/* =============================================================
   Sonic Polyglot / Glosify — Design System Foundations
   =============================================================
   Web fonts are requested by a <link> in the layout <head>, not by an
   @import here: an @import makes the font stylesheet a child request of
   this file, so the browser cannot start it until site.css has arrived.
   ============================================================= */

:root {
    /* Brand colors */
    --primary: #53e076;
    --primary-fixed: #72fe8f;
    --primary-fixed-dim: #53e076;
    --primary-container: #1db954;
    --on-primary: #003914;
    --on-primary-container: #004118;
    --inverse-primary: #006e2d;
    --surface-tint: #53e076;

    --secondary: #99d59d;
    --secondary-container: #1c5329;
    --secondary-fixed: #b5f1b8;
    --on-secondary: #003914;
    --on-secondary-container: #8cc690;

    --tertiary: #ffb3b3;
    --tertiary-container: #ff767b;
    --on-tertiary: #680114;

    --error: #ffb4ab;
    --error-container: #93000a;
    --on-error: #690005;
    --on-error-container: #ffdad6;

    /* Surfaces (midnight blue scale) */
    --bg: #041329;
    --background: #041329;
    --surface: #112036;
    --surface-lowest: #010e24;
    --surface-low: #0d1c32;
    --surface-container-lowest: #010e24;
    --surface-container-low: #0d1c32;
    --surface-container: #112036;
    --surface-container-high: #1c2a41;
    --surface-container-highest: #27354c;
    --surface-high: #1c2a41;
    --surface-highest: #27354c;
    --surface-bright: #2c3951;
    --inverse-surface: #d6e3ff;
    --inverse-on-surface: #233148;

    /* Foreground */
    --on-surface: #d6e3ff;
    --on-background: #d6e3ff;
    --on-surface-var: #bccbb9;
    --on-surface-variant: #bccbb9;
    --outline: #869585;
    --outline-var: #3d4a3d;
    --outline-variant: #3d4a3d;

    /* Type families */
    --font-display: 'Plus Jakarta Sans', system-ui, sans-serif;
    --font-body: 'Plus Jakarta Sans', system-ui, sans-serif;
    --font-serif: 'Lora', Georgia, serif;
    --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

    /* Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 2rem;
    --radius-xl: 3rem;
    --radius-full: 9999px;

    /* Spacing */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;

    /* Elevation / shadow / glow */
    --shadow-card: 0 1px 0 rgba(255, 255, 255, 0.03) inset, 0 8px 24px rgba(0, 0, 0, 0.35);
    --shadow-pop: 0 12px 40px rgba(0, 0, 0, 0.45);
    --glow-primary: 0 0 24px rgba(83, 224, 118, 0.35);
    --glow-soft: 0 0 80px rgba(83, 224, 118, 0.18);

    /* Motion */
    --ease-standard: cubic-bezier(0.2, 0, 0, 1);
    --ease-emphasized: cubic-bezier(0.3, 0, 0, 1);
    --dur-fast: 150ms;
    --dur-base: 250ms;
    --dur-slow: 400ms;
}

html {
  font-size: 14px;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

/* Selection — neon green like the design system */
::selection { background: var(--primary); color: var(--on-primary); }

/* The signature uppercase tracked "label" microtype */
.eyebrow,
.label-eyebrow {
    font-family: var(--font-body);
    font-weight: 700;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    color: var(--on-surface-var);
    margin: 0;
}

.eyebrow.is-primary,
.label-eyebrow.is-primary { color: var(--primary); }

/* Brand wordmark — italic Plus Jakarta Sans 800 */
.wordmark {
    font-family: var(--font-display);
    font-weight: 800;
    font-style: italic;
    letter-spacing: -0.02em;
    color: var(--primary);
    margin: 0;
}

.wordmark a {
    color: inherit;
    text-decoration: none;
}

/* Material Symbols defaults */
.material-symbols-outlined {
    font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
    vertical-align: middle;
}

.material-symbols-outlined.filled,
.material-symbols-filled {
    font-variation-settings: 'FILL' 1, 'wght' 500, 'GRAD' 0, 'opsz' 24;
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
  box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
}

html {
  position: relative;
  min-height: 100%;
}

body {
  margin-bottom: 60px;
}

.form-floating > .form-control-plaintext::placeholder, .form-floating > .form-control::placeholder {
  color: var(--bs-secondary-color);
  text-align: end;
}

.form-floating > .form-control-plaintext:focus::placeholder, .form-floating > .form-control:focus::placeholder {
  text-align: start;
}

.material-symbols-filled {
  font-variation-settings: 'FILL' 1, 'wght' 400, 'GRAD' 0, 'opsz' 24;
}

.icon-sm {
  font-size: 18px;
}

.language-context-pill {
  text-decoration: none;
}

.language-context-pill-active {
  background: rgba(83, 224, 118, 0.12);
  color: #53e076;
}

.language-context-pill-empty {
  background: rgba(255, 180, 171, 0.14);
  color: #ffb4ab;
}

.language-context-icon {
  font-size: 14px;
}

.language-change-link {
  color: var(--primary);
  font-weight: 700;
  text-decoration: none;
}

.language-change-link-sm {
  font-size: 12px;
}

.target-language-display {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: default;
}

.admin-credit-search {
    display: flex;
    gap: 12px;
    align-items: center;
    max-width: 720px;
    margin-bottom: 22px;
}

.admin-credit-search .form-input {
    margin: 0;
}

.admin-credit-grid {
    display: grid;
    grid-template-columns: minmax(260px, 360px) minmax(0, 1fr);
    gap: 20px;
    align-items: start;
}

.admin-credit-panel {
    min-width: 0;
}

.admin-credit-user-list {
    display: grid;
    gap: 8px;
}

.admin-credit-user {
    display: grid;
    gap: 4px;
    padding: 12px;
    border: 1px solid color-mix(in srgb, var(--outline-variant) 70%, transparent);
    border-radius: 8px;
    background: var(--surface-container-low);
    color: var(--on-surface);
    text-decoration: none;
}

.admin-credit-user:hover,
.admin-credit-user.is-active {
    border-color: color-mix(in srgb, var(--primary) 40%, var(--outline-variant));
    background: var(--surface-container);
}

.admin-credit-user span {
    color: var(--on-surface-var);
    font-size: 13px;
}

.admin-credit-summary {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    margin-bottom: 18px;
}

.admin-credit-summary div {
    display: grid;
    gap: 6px;
    padding: 14px;
    border: 1px solid color-mix(in srgb, var(--outline-variant) 70%, transparent);
    border-radius: 8px;
    background: var(--surface-container-low);
}

.admin-credit-summary span {
    color: var(--on-surface-var);
    font-size: 12px;
    font-weight: 800;
    text-transform: uppercase;
}

.admin-credit-summary strong {
    font-size: 28px;
}

.admin-credit-grant {
    max-width: 520px;
    margin-bottom: 24px;
}

.admin-credit-table {
    width: 100%;
    border-collapse: collapse;
    overflow: hidden;
    border: 1px solid color-mix(in srgb, var(--outline-variant) 70%, transparent);
    border-radius: 8px;
    background: var(--surface-container-low);
    font-size: 13px;
}

.admin-credit-table th,
.admin-credit-table td {
    padding: 10px 12px;
    border-bottom: 1px solid color-mix(in srgb, var(--outline-variant) 70%, transparent);
    text-align: left;
    vertical-align: top;
}

.admin-credit-table th {
    color: var(--on-surface-var);
    font-size: 12px;
    font-weight: 800;
    text-transform: uppercase;
}

.admin-credit-table tr:last-child td {
    border-bottom: 0;
}

.admin-credit-empty {
    padding: 24px;
}

@media (max-width: 900px) {
    .admin-credit-grid,
    .admin-credit-summary {
        grid-template-columns: 1fr;
    }

    .admin-credit-search {
        align-items: stretch;
        flex-direction: column;
    }
}

.share-form {
  margin: 0;
}

.btn-hero-secondary {
  border: 1px solid rgba(214, 227, 255, 0.2);
  background: rgba(17, 32, 54, 0.72);
  color: var(--on-surface);
}

.visibility-checkbox-form {
  display: inline-flex;
}

.visibility-checkbox {
  align-items: center;
  border: 1px solid rgba(214, 227, 255, 0.18);
  border-radius: 8px;
  background: rgba(17, 32, 54, 0.48);
  color: var(--on-surface-var);
  cursor: pointer;
  display: inline-flex;
  font-size: 13px;
  font-weight: 750;
  gap: 9px;
  min-height: 40px;
  padding: 8px 12px;
}

.visibility-checkbox input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.visibility-checkbox-box {
  align-items: center;
  border: 1px solid rgba(214, 227, 255, 0.32);
  border-radius: 4px;
  display: inline-flex;
  flex: 0 0 auto;
  height: 18px;
  justify-content: center;
  width: 18px;
}

.visibility-checkbox input[type="checkbox"]:focus-visible + input + .visibility-checkbox-box {
  box-shadow: 0 0 0 2px var(--primary);
}

.visibility-checkbox input[type="checkbox"]:checked + input + .visibility-checkbox-box {
  border-color: rgba(83, 224, 118, 0.75);
  background: rgba(83, 224, 118, 0.18);
}

.visibility-checkbox input[type="checkbox"]:checked + input + .visibility-checkbox-box::after {
  color: var(--primary);
  content: "check";
  font-family: "Material Symbols Outlined";
  font-size: 16px;
  font-variation-settings: "FILL" 1, "wght" 700, "GRAD" 0, "opsz" 20;
  line-height: 1;
}

.visibility-checkbox:hover {
  border-color: rgba(83, 224, 118, 0.35);
  color: var(--on-surface);
}

.collection-share-form {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.btn-inline-share,
.btn-copy-public {
  align-items: center;
  border: 1px solid rgba(83, 224, 118, 0.28);
  border-radius: 999px;
  background: rgba(83, 224, 118, 0.12);
  color: var(--primary);
  display: inline-flex;
  font-weight: 800;
  gap: 6px;
  justify-content: center;
  min-height: 38px;
  padding: 8px 14px;
}

.btn-inline-share {
  cursor: pointer;
}

.btn-copy-public {
  width: 100%;
}

.explore-path {
  margin: -8px 0 16px;
}
/* Extracted from Glosify/Views/Languages/Index.cshtml */
.language-page {
        display: flex;
        flex-direction: column;
        gap: 64px;
        padding-bottom: 64px;
    }

    .language-hero {
        text-align: center;
        display: flex;
        flex-direction: column;
        gap: 18px;
        align-items: center;
    }

    .language-brand {
        font-size: 28px;
        font-weight: 800;
        letter-spacing: -0.03em;
        color: #1DB954;
        margin: 0;
    }

    .language-tagline {
        font-size: clamp(32px, 5vw, 48px);
        font-weight: 900;
        letter-spacing: -0.03em;
        line-height: 1.1;
        margin: 0;
        color: var(--on-surface);
        max-width: 880px;
    }

    .language-tagline .accent {
        background: linear-gradient(90deg, var(--primary), var(--primary-container));
        -webkit-background-clip: text;
        background-clip: text;
        color: transparent;
    }

    .language-current {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 8px 16px;
        border-radius: 9999px;
        background: rgba(83, 224, 118, 0.12);
        color: var(--primary);
        font-size: 13px;
        font-weight: 700;
        letter-spacing: 0.02em;
    }

    .language-form {
        display: grid;
        grid-template-columns: repeat(4, minmax(0, 1fr));
        gap: 24px;
        margin: 0;
        padding: 0;
        border: 0;
    }

    @media (max-width: 1024px) {
        .language-form { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    }

    @media (max-width: 600px) {
        .language-form { grid-template-columns: minmax(0, 1fr); }
    }

    .language-card {
        appearance: none;
        font: inherit;
        cursor: pointer;
        position: relative;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 24px;
        padding: 36px 24px;
        border-radius: 24px;
        text-decoration: none;
        color: var(--on-surface);
        background: linear-gradient(135deg, rgba(44, 57, 81, 0.6) 0%, rgba(17, 32, 54, 0.6) 100%);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border: 1px solid rgba(255, 255, 255, 0.10);
        box-shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
        transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
        overflow: hidden;
    }

    .language-card:hover,
    .language-card:focus-visible {
        transform: scale(1.05);
        border-color: rgba(83, 224, 118, 0.32);
        box-shadow: 0 22px 50px rgba(0, 0, 0, 0.45);
        outline: none;
    }

    .language-card.is-current {
        border-color: var(--primary);
        box-shadow: 0 22px 50px rgba(83, 224, 118, 0.18);
    }

    .language-card.is-current::after {
        content: "Active";
        position: absolute;
        top: 14px;
        right: 14px;
        background: var(--primary);
        color: var(--on-primary);
        font-size: 10px;
        font-weight: 800;
        letter-spacing: 0.12em;
        text-transform: uppercase;
        padding: 4px 10px;
        border-radius: 9999px;
    }

    .flag-frame {
        width: 96px;
        height: 64px;
        border-radius: 8px;
        overflow: hidden;
        box-shadow: 0 10px 24px rgba(0, 0, 0, 0.4);
        transition: transform 0.3s ease;
    }

    .language-card:hover .flag-frame,
    .language-card:focus-visible .flag-frame {
        transform: scale(1.1);
    }

    .flag-frame svg {
        display: block;
        width: 100%;
        height: 100%;
    }

    .language-name {
        font-size: 24px;
        font-weight: 800;
        letter-spacing: -0.01em;
        margin: 0;
        transition: color 0.3s ease;
    }

    .language-card:hover .language-name,
    .language-card:focus-visible .language-name,
    .language-card.is-current .language-name {
        color: var(--primary);
    }

/* Extracted from Glosify/Views/Quiz/flashcard-quiz.cshtml */
.flash-shell {
        display: grid;
        gap: 30px;
        padding-bottom: 48px;
    }

    .flash-header {
        display: flex;
        align-items: flex-end;
        justify-content: space-between;
        gap: 24px;
    }

    .flash-kicker {
        color: var(--primary);
        font-size: 11px;
        font-weight: 850;
        letter-spacing: 0.14em;
        margin: 0 0 8px;
        text-transform: uppercase;
    }

    .flash-title {
        font-size: 34px;
        font-weight: 900;
        letter-spacing: -0.03em;
        line-height: 1.08;
        margin: 0;
    }

    .flash-subtitle,
    .progress-count {
        color: var(--on-surface-var);
        font-size: 14px;
        font-weight: 700;
    }

    .progress-wrap {
        display: grid;
        gap: 12px;
    }

    .progress-meta {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 20px;
    }

    .progress-track {
        height: 10px;
        overflow: hidden;
        border-radius: 9999px;
        background: var(--surface-highest);
    }

    .progress-fill {
        height: 100%;
        width: 0;
        border-radius: inherit;
        background: linear-gradient(90deg, var(--primary), var(--primary-container));
        transition: width 0.25s ease;
    }

    .card-stage {
        display: grid;
        justify-items: center;
        gap: 24px;
        perspective: 1200px;
    }

    .card-reveal-form {
        width: min(100%, 720px);
    }

    .flashcard {
        --flashcard-flip-ease: cubic-bezier(0.22, 1, 0.36, 1);
        width: min(100%, 720px);
        min-height: 360px;
        display: grid;
        align-content: center;
        gap: 24px;
        border: 1px solid rgba(61, 74, 61, 0.28);
        border-radius: 8px;
        background: var(--surface);
        box-shadow: 0 28px 70px rgba(1, 14, 36, 0.34);
        color: var(--on-surface);
        font: inherit;
        padding: 44px;
        text-align: center;
        backface-visibility: hidden;
        transform-style: preserve-3d;
        transition:
            transform 0.36s var(--flashcard-flip-ease),
            box-shadow 0.24s ease,
            border-color 0.24s ease;
        will-change: transform;
    }

    .card-reveal-form .flashcard {
        width: 100%;
    }

    .flashcard-clickable {
        cursor: pointer;
    }

    .flashcard-clickable:hover,
    .flashcard-clickable:focus-visible {
        border-color: rgba(83, 224, 118, 0.54);
        box-shadow: 0 32px 78px rgba(1, 14, 36, 0.4);
        outline: none;
        transform: translateY(-3px) rotateY(-3deg);
    }

    .flashcard-clickable.is-flipping {
        pointer-events: none;
        transform: rotateY(88deg) scale(0.98);
    }

    .flashcard.is-revealed {
        animation: flashcard-flip-in 0.42s var(--flashcard-flip-ease) both;
    }

    @keyframes flashcard-flip-in {
        from {
            opacity: 0.92;
            transform: rotateY(-88deg) scale(0.98);
        }

        to {
            opacity: 1;
            transform: rotateY(0);
        }
    }

    @media (prefers-reduced-motion: reduce) {
        .flashcard {
            transition: none;
        }

        .flashcard.is-revealed {
            animation: none;
        }
    }

    .card-label {
        width: fit-content;
        justify-self: center;
        border-radius: 9999px;
        background: rgba(83, 224, 118, 0.12);
        color: var(--primary);
        font-size: 11px;
        font-weight: 850;
        letter-spacing: 0.12em;
        padding: 6px 12px;
        text-transform: uppercase;
    }

    .card-word {
        font-size: clamp(36px, 8vw, 70px);
        font-weight: 900;
        line-height: 1.05;
        margin: 0;
        overflow-wrap: anywhere;
    }

    .card-answer {
        display: none;
        gap: 14px;
    }

    .card-answer.revealed {
        display: grid;
    }

    .translation {
        color: var(--primary);
        font-size: 26px;
        font-weight: 850;
        overflow-wrap: anywhere;
    }

    .card-answer .translation {
        font-size: clamp(36px, 7vw, 58px);
        line-height: 1.08;
    }

    .example {
        color: var(--on-surface-var);
        font-size: 15px;
        font-weight: 650;
        line-height: 1.55;
        overflow-wrap: anywhere;
    }

    .controls {
        width: min(100%, 720px);
        display: grid;
        gap: 14px;
    }

    .btn-main,
    .btn-rating,
    .btn-linkish {
        border: none;
        border-radius: 9999px;
        cursor: pointer;
        font: inherit;
        font-weight: 850;
    }

    .btn-main {
        background: var(--primary-container);
        color: var(--on-primary);
        padding: 18px 24px;
    }

    .rating-row {
        display: none;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 12px;
    }

    .rating-row.revealed {
        display: grid;
    }

    .btn-rating {
        background: var(--surface-low);
        border: 1px solid rgba(61, 74, 61, 0.28);
        color: var(--on-surface);
        min-height: 58px;
        padding: 14px;
    }

    .btn-rating.again {
        color: var(--error);
    }

    .btn-rating.easy {
        color: var(--primary);
    }

    .btn-linkish {
        justify-self: center;
        background: transparent;
        color: var(--on-surface-var);
        padding: 8px 12px;
    }

    .results {
        display: none;
        width: min(100%, 720px);
        border: 1px solid rgba(83, 224, 118, 0.32);
        border-radius: 8px;
        background: var(--surface);
        padding: 32px;
        text-align: center;
    }

    .results.visible {
        display: grid;
        gap: 18px;
    }

    .result-score {
        color: var(--primary);
        font-size: 52px;
        font-weight: 900;
        line-height: 1;
    }

    .result-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 12px;
    }

    .result-stat {
        border-radius: 8px;
        background: var(--surface-low);
        padding: 16px;
    }

    .result-stat span {
        display: block;
    }

    .result-stat span:first-child {
        color: var(--on-surface-var);
        font-size: 12px;
        font-weight: 800;
        text-transform: uppercase;
    }

    .result-stat span:last-child {
        font-size: 24px;
        font-weight: 900;
    }

    .empty-state {
        width: min(100%, 720px);
        border: 1px dashed rgba(83, 224, 118, 0.36);
        border-radius: 8px;
        background: var(--surface-low);
        color: var(--on-surface-var);
        padding: 42px;
        text-align: center;
    }

    @media (max-width: 700px) {
        .flash-header,
        .progress-meta {
            align-items: flex-start;
            flex-direction: column;
        }

        .flash-header .flash-subtitle {
            display: none;
        }

        .flashcard {
            min-height: 220px;
            padding: 24px 18px;
        }

        .card-stage {
            gap: 16px;
        }

        .controls {
            gap: 10px;
        }

        .result-grid {
            grid-template-columns: 1fr;
        }

        .rating-row,
        .rating-row.revealed {
            grid-template-columns: repeat(3, minmax(0, 1fr));
            gap: 8px;
        }

        .btn-rating {
            min-height: 50px;
            padding: 12px 8px;
            font-size: 14px;
        }

        .btn-linkish {
            padding: 6px 10px;
        }
    }

/* Extracted from Glosify/Views/Quiz/quiz-view.cshtml */
.workspace {
        display: flex;
        flex-direction: column;
        gap: 32px;
        padding-bottom: 48px;
    }

    .workspace-hero {
        position: relative;
        min-height: 220px;
        display: flex;
        align-items: center;
        overflow: hidden;
        border-radius: 8px;
        padding: 48px;
        background: var(--surface-low);
    }

    .workspace-hero::before {
        content: "";
        position: absolute;
        inset: 0;
        background:
            linear-gradient(90deg, rgba(4, 19, 41, 0.98), rgba(4, 19, 41, 0.78), rgba(4, 19, 41, 0.38)),
            url("https://images.unsplash.com/photo-1524995997946-a1c2e315a42f?auto=format&fit=crop&w=1600&q=80") center/cover;
    }

    .workspace-hero-content {
        position: relative;
        z-index: 1;
        max-width: 620px;
    }

    .hero-label {
        color: var(--primary);
        font-size: 11px;
        font-weight: 800;
        letter-spacing: 0.16em;
        text-transform: uppercase;
        margin-bottom: 10px;
    }

    .hero-title {
        font-size: 40px;
        font-weight: 900;
        letter-spacing: -0.04em;
        line-height: 1.05;
        margin: 0 0 24px;
    }

    .btn-hero,
    .btn-submit {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 10px;
        border: none;
        border-radius: 9999px;
        background: var(--primary-container);
        color: var(--on-primary);
        font-weight: 850;
        text-decoration: none;
        cursor: pointer;
        transition: transform 0.2s, box-shadow 0.2s;
    }

    .btn-hero {
        padding: 15px 30px;
        box-shadow: 0 14px 34px rgba(29, 185, 84, 0.24);
    }

    .btn-submit {
        width: 100%;
        padding: 15px 20px;
    }

    .btn-hero:hover,
    .btn-submit:hover {
        transform: translateY(-1px);
        box-shadow: 0 18px 42px rgba(29, 185, 84, 0.28);
    }

    .btn-submit:disabled {
        cursor: wait;
        opacity: 0.68;
        transform: none;
        box-shadow: none;
    }

    .tool-grid {
        display: grid;
        grid-template-columns: minmax(260px, 1fr) minmax(0, 2fr);
        gap: 24px;
    }

    .tool-grid-single {
        grid-template-columns: minmax(260px, 420px);
    }

    .panel {
        background: var(--surface);
        border: 1px solid rgba(61, 74, 61, 0.28);
        border-radius: 8px;
        padding: 28px;
    }

    .panel-header {
        display: flex;
        align-items: center;
        gap: 12px;
        margin-bottom: 22px;
    }

    .panel-icon {
        width: 40px;
        height: 40px;
        display: flex;
        align-items: center;
        justify-content: center;
        flex-shrink: 0;
        border-radius: 9999px;
        background: rgba(83, 224, 118, 0.1);
        color: var(--primary);
    }

    .panel-title {
        font-size: 18px;
        font-weight: 800;
        margin: 0;
    }

    .form-group { margin-bottom: 16px; }

    .panel-message {
        border-radius: 8px;
        font-size: 13px;
        font-weight: 750;
        line-height: 1.4;
        margin-bottom: 16px;
        padding: 12px 14px;
    }

    .panel-message.success {
        background: rgba(83, 224, 118, 0.12);
        color: var(--primary);
    }

    .panel-message.error {
        background: rgba(255, 96, 96, 0.14);
        color: #ffb4b4;
    }

    .generation-progress {
        display: grid;
        gap: 10px;
        border: 1px solid rgba(83, 224, 118, 0.24);
        border-radius: 8px;
        background: rgba(83, 224, 118, 0.08);
        margin-bottom: 16px;
        padding: 14px;
    }

    .generation-progress[hidden] {
        display: none;
    }

    .generation-progress-top {
        display: flex;
        align-items: center;
        gap: 10px;
        color: var(--on-surface);
        font-size: 13px;
        font-weight: 850;
        line-height: 1.35;
    }

    .generation-spinner {
        color: var(--primary);
        font-size: 22px;
        animation: spin 1.1s linear infinite;
    }

    .generation-progress-track {
        height: 6px;
        overflow: hidden;
        border-radius: 9999px;
        background: rgba(188, 203, 185, 0.14);
    }

    .generation-progress-fill {
        width: 42%;
        height: 100%;
        border-radius: inherit;
        background: linear-gradient(90deg, transparent, var(--primary), transparent);
        animation: progress-sweep 1.45s ease-in-out infinite;
    }

    .generation-progress-meta {
        color: var(--on-surface-var);
        font-size: 12px;
        font-weight: 750;
    }

    @keyframes spin {
        to { transform: rotate(360deg); }
    }

    @keyframes progress-sweep {
        0% { transform: translateX(-110%); }
        100% { transform: translateX(250%); }
    }

    .service-warmup {
        display: grid;
        justify-items: start;
        max-width: 680px;
        gap: 14px;
        padding: 64px 0;
    }

    .service-warmup-icon {
        display: grid;
        place-items: center;
        width: 56px;
        height: 56px;
        border-radius: 8px;
        background: rgba(83, 224, 118, 0.12);
        color: var(--primary);
    }

    .service-warmup-icon .material-symbols-outlined {
        font-size: 30px;
        animation: spin 1.4s linear infinite;
    }

    .service-warmup-title {
        margin: 0;
        color: var(--on-surface);
        font-size: clamp(32px, 5vw, 56px);
        font-weight: 950;
        line-height: 0.95;
    }

    .service-warmup-message {
        margin: 0;
        color: var(--on-surface-var);
        font-size: 17px;
        font-weight: 650;
        line-height: 1.6;
    }

    .form-label {
        display: block;
        color: var(--on-surface-var);
        font-size: 11px;
        font-weight: 800;
        letter-spacing: 0.08em;
        text-transform: uppercase;
        margin-bottom: 8px;
    }

    .visually-hidden {
        position: absolute !important;
        width: 1px !important;
        height: 1px !important;
        padding: 0 !important;
        margin: -1px !important;
        overflow: hidden !important;
        clip: rect(0, 0, 0, 0) !important;
        white-space: nowrap !important;
        border: 0 !important;
    }

    .scan-toolbar {
        display: flex;
        align-items: center;
        gap: 12px;
        margin-bottom: 10px;
    }

    .btn-scan-text {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        min-height: 42px;
        border: 1px solid rgba(83, 224, 118, 0.28);
        border-radius: 9999px;
        background: rgba(83, 224, 118, 0.10);
        color: var(--primary);
        cursor: pointer;
        font: inherit;
        font-size: 13px;
        font-weight: 850;
        padding: 0 16px;
    }

    .btn-scan-text:disabled {
        cursor: wait;
        opacity: 0.62;
    }

    .assistant-model-picker {
        margin-left: auto;
    }

    .assistant-model-picker select {
        min-height: 42px;
        max-width: 210px;
        border: 1px solid rgba(83, 224, 118, 0.24);
        border-radius: 9999px;
        background: var(--surface-highest);
        color: var(--on-surface);
        cursor: pointer;
        font: inherit;
        font-size: 12px;
        font-weight: 800;
        padding: 0 34px 0 14px;
    }

    .btn-icon-repair {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 34px;
        height: 34px;
        border: 1px solid rgba(83, 224, 118, 0.24);
        border-radius: 8px;
        background: rgba(83, 224, 118, 0.08);
        color: var(--primary);
        cursor: pointer;
    }

    .btn-icon-repair:disabled,
    .btn-inline-repair:disabled {
        cursor: wait;
        opacity: 0.58;
    }

    .btn-icon-repair .material-symbols-outlined {
        font-size: 20px;
    }

    .btn-inline-repair {
        display: inline-flex;
        align-items: center;
        gap: 5px;
        margin-left: 10px;
        border: none;
        background: transparent;
        color: var(--primary);
        cursor: pointer;
        font: inherit;
        font-size: 12px;
        font-weight: 850;
    }

    .btn-inline-repair .material-symbols-outlined {
        font-size: 17px;
    }

    .btn-scan-text .material-symbols-outlined {
        font-size: 20px;
    }

    .scan-status {
        color: var(--on-surface-var);
        font-size: 12px;
        font-weight: 750;
        line-height: 1.35;
    }

    .scan-status.is-error {
        color: var(--error);
    }

    .form-input,
    .form-textarea {
        width: 100%;
        background: var(--surface-highest);
        color: var(--on-surface);
        border: none;
        border-radius: 9999px;
        padding: 13px 18px;
        font: inherit;
        outline: none;
    }

    .form-textarea {
        min-height: 150px;
        resize: vertical;
        border-radius: 8px;
        background: var(--surface-lowest);
        padding: 18px;
    }

    .form-input:focus,
    .form-textarea:focus {
        box-shadow: 0 0 0 2px var(--primary);
    }

    .collection-header {
        display: flex;
        justify-content: space-between;
        align-items: flex-end;
        gap: 20px;
        margin-bottom: 18px;
    }

    .collection-title {
        font-size: 24px;
        font-weight: 900;
        letter-spacing: -0.03em;
        margin: 0;
    }

    .collection-subtitle {
        color: var(--on-surface-var);
        font-size: 14px;
        margin: 5px 0 0;
    }

    .tab-group {
        display: flex;
        flex-shrink: 0;
        background: var(--surface);
        border-radius: 9999px;
        padding: 4px;
    }

    .tab {
        border: none;
        border-radius: 9999px;
        background: transparent;
        color: var(--on-surface-var);
        padding: 8px 22px;
        font-weight: 800;
    }

    .tab.active {
        background: var(--primary);
        color: var(--on-primary);
    }

    .word-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: 16px;
    }

    .tab-panel[hidden] {
        display: none;
    }

    .sentence-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
        gap: 16px;
    }

    .sentence-card {
        display: grid;
        gap: 14px;
        min-height: 140px;
        background: var(--surface-low);
        border: 1px solid rgba(61, 74, 61, 0.22);
        border-radius: 8px;
        padding: 22px;
    }

    .sentence-card-top {
        display: flex;
        align-items: flex-start;
        gap: 14px;
    }

    .sentence-text {
        color: var(--on-surface);
        font-size: 17px;
        font-weight: 800;
        line-height: 1.45;
        overflow-wrap: anywhere;
    }

    .sentence-translation {
        color: var(--on-surface-var);
        font-size: 14px;
        font-weight: 650;
        line-height: 1.5;
        overflow-wrap: anywhere;
    }

    .sentence-meta {
        color: rgba(188, 203, 185, 0.68);
        font-size: 12px;
        font-weight: 750;
    }

    .word-card {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 18px;
        min-height: 100px;
        background: var(--surface-low);
        border: 1px solid rgba(61, 74, 61, 0.22);
        border-radius: 8px;
        padding: 22px;
        transition: border-color 0.2s, transform 0.2s, background 0.2s;
    }

    .word-card:hover {
        transform: translateY(-2px);
        border-color: rgba(83, 224, 118, 0.52);
        background: var(--surface);
    }

    .word-card.loading {
        opacity: 0.6;
        pointer-events: none;
    }

    .word-card.loading .word-icon {
        animation: spin 0.8s linear infinite;
    }

    @keyframes spin {
        to { transform: rotate(360deg); }
    }

    .word-card-main {
        display: flex;
        align-items: center;
        gap: 18px;
        min-width: 0;
        flex: 1 1 auto;
    }

    .word-card-link {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 18px;
        min-width: 0;
        flex: 1;
        color: inherit;
        text-decoration: none;
    }

    .word-card-left {
        display: flex;
        align-items: center;
        gap: 18px;
        min-width: 0;
        flex: 1 1 auto;
    }

    .word-card-left > div {
        min-width: 0;
        flex: 1 1 auto;
    }

    .word-icon {
        width: 46px;
        height: 46px;
        display: flex;
        align-items: center;
        justify-content: center;
        flex-shrink: 0;
        border-radius: 8px;
        background: var(--surface-highest);
        color: var(--primary);
    }

    .word-wiktionary-link {
        text-decoration: none;
        transition: background 0.2s, color 0.2s, transform 0.2s;
    }

    .word-wiktionary-link:hover,
    .word-wiktionary-link:focus-visible {
        background: var(--primary);
        color: var(--on-primary);
        transform: translateY(-1px);
    }

    .word-wiktionary-link:focus-visible {
        outline: 2px solid var(--primary);
        outline-offset: 3px;
    }

    .word {
        font-size: 18px;
        font-weight: 850;
        overflow-wrap: break-word;
        word-break: normal;
    }

    .word-card .translation {
        color: var(--on-surface-var);
        font-size: 14px;
        font-weight: 650;
        margin-top: 3px;
        overflow-wrap: break-word;
        word-break: normal;
    }

    .word-date {
        color: rgba(188, 203, 185, 0.65);
        font-size: 12px;
        font-weight: 700;
        white-space: nowrap;
    }

    .word-actions {
        display: flex;
        align-items: center;
        flex-direction: column;
        gap: 10px;
        flex-shrink: 0;
    }

    .delete-word-form {
        margin: 0;
    }

    .btn-icon-delete {
        width: 38px;
        height: 38px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        border: 1px solid rgba(255, 96, 96, 0.28);
        border-radius: 9999px;
        background: rgba(255, 96, 96, 0.08);
        color: #ffb4b4;
        cursor: pointer;
    }

    .btn-icon-delete .material-symbols-outlined {
        font-size: 20px;
    }

    .btn-icon-delete:hover {
        background: rgba(255, 96, 96, 0.16);
        border-color: rgba(255, 96, 96, 0.48);
    }

    .empty-state {
        grid-column: 1 / -1;
        display: flex;
        align-items: center;
        justify-content: center;
        min-height: 180px;
        color: var(--on-surface-var);
        background: var(--surface-low);
        border: 1px dashed rgba(83, 224, 118, 0.35);
        border-radius: 8px;
        text-align: center;
        padding: 32px;
    }

    @media (max-width: 900px) {
        .tool-grid { grid-template-columns: 1fr; }
        .collection-header { align-items: flex-start; flex-direction: column; }
    }

/* Extracted from Glosify/Views/Quiz/select-quiz.cshtml */
.select-quiz-page {
        min-height: calc(100vh - 6rem);
        display: flex;
        flex-direction: column;
        gap: 32px;
        padding-bottom: 48px;
    }

    .select-header {
        display: flex;
        justify-content: space-between;
        align-items: flex-end;
        gap: 24px;
    }

    .select-kicker {
        color: var(--primary);
        font-size: 11px;
        font-weight: 800;
        letter-spacing: 0.16em;
        text-transform: uppercase;
        margin-bottom: 8px;
    }

    .select-title {
        font-size: 40px;
        font-weight: 900;
        letter-spacing: -0.03em;
        line-height: 1.05;
        margin: 0;
    }

    .select-subtitle {
        color: var(--on-surface-var);
        font-size: 15px;
        margin: 10px 0 0;
    }

    .btn-new-quiz {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        flex-shrink: 0;
        background: var(--primary-container);
        color: var(--on-primary);
        border: none;
        border-radius: 9999px;
        padding: 14px 24px;
        font-weight: 800;
        cursor: pointer;
        transition: transform 0.2s, box-shadow 0.2s;
        box-shadow: 0 12px 28px rgba(29, 185, 84, 0.18);
    }

    a.btn-new-quiz {
        text-decoration: none;
    }

    .btn-new-quiz:hover { transform: translateY(-1px); box-shadow: 0 16px 36px rgba(29, 185, 84, 0.24); }
    .btn-new-quiz:active { transform: scale(0.98); }

    .select-actions,
    .empty-actions {
        display: flex;
        align-items: center;
        gap: 12px;
        flex-wrap: wrap;
    }

    .btn-secondary-action {
        background: var(--surface-high);
        color: var(--on-surface);
        border: 1px solid rgba(83, 224, 118, 0.22);
        box-shadow: none;
    }

    .btn-back-library {
        background: transparent;
        color: var(--on-surface-var);
        border: 1px solid rgba(188, 203, 185, 0.2);
        box-shadow: none;
    }

    .btn-secondary-action:hover {
        box-shadow: 0 12px 28px rgba(0, 0, 0, 0.18);
    }

    .library-section {
        display: flex;
        flex-direction: column;
        gap: 14px;
    }

    .library-section-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
        color: var(--on-surface-var);
    }

    .library-section-header h2 {
        color: var(--on-surface);
        font-size: 18px;
        font-weight: 850;
        margin: 0;
    }

    .library-section-header span {
        min-width: 32px;
        min-height: 28px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        border-radius: 9999px;
        background: var(--surface-high);
        font-size: 12px;
        font-weight: 800;
    }

    .quiz-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
        gap: 18px;
    }

    .quiz-card {
        min-height: 188px;
        display: flex;
        flex-direction: column;
        justify-content: space-between;
        background: var(--surface);
        color: inherit;
        border: 1px solid rgba(61, 74, 61, 0.28);
        border-radius: 8px;
        padding: 24px;
        transition: transform 0.2s, border-color 0.2s, background 0.2s;
    }

    .quiz-card:hover {
        transform: translateY(-2px);
        background: var(--surface-high);
        border-color: rgba(83, 224, 118, 0.4);
    }

    .quiz-card[draggable="true"] {
        cursor: grab;
    }

    .quiz-card[draggable="true"]:active,
    .quiz-card.is-dragging {
        cursor: grabbing;
    }

    .quiz-card.is-dragging {
        opacity: 0.54;
        transform: scale(0.98);
    }

    .quiz-drag-preview {
        position: fixed;
        top: -1000px;
        left: -1000px;
        z-index: 9999;
        width: 280px;
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 14px 16px;
        border: 1px solid rgba(83, 224, 118, 0.44);
        border-radius: 8px;
        background: var(--surface-high);
        color: var(--on-surface);
        box-shadow: 0 18px 44px rgba(0, 0, 0, 0.34);
        pointer-events: none;
    }

    .quiz-drag-preview > .material-symbols-outlined {
        width: 40px;
        height: 40px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        flex-shrink: 0;
        border-radius: 8px;
        background: rgba(83, 224, 118, 0.12);
        color: var(--primary);
    }

    .quiz-drag-preview-text {
        min-width: 0;
        display: grid;
        gap: 2px;
    }

    .quiz-drag-preview strong,
    .quiz-drag-preview small {
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .quiz-drag-preview strong {
        font-size: 14px;
        font-weight: 850;
    }

    .quiz-drag-preview small {
        color: var(--on-surface-var);
        font-size: 12px;
        font-weight: 700;
    }

    .quiz-card-link {
        color: inherit;
        text-decoration: none;
    }

    .quiz-card-top {
        display: flex;
        align-items: flex-start;
        justify-content: space-between;
        gap: 16px;
    }

    .quiz-icon {
        width: 48px;
        height: 48px;
        display: flex;
        align-items: center;
        justify-content: center;
        flex-shrink: 0;
        background: rgba(83, 224, 118, 0.1);
        color: var(--primary);
        border-radius: 8px;
    }

    .quiz-arrow {
        color: var(--on-surface-var);
        transition: color 0.2s, transform 0.2s;
    }

    .quiz-card:hover .quiz-arrow {
        color: var(--primary);
        transform: translateX(2px);
    }

    .collection-card {
        border-color: rgba(87, 166, 255, 0.28);
    }

    .collection-card:hover {
        border-color: rgba(87, 166, 255, 0.5);
    }

    .is-dragging-quiz .collection-card {
        outline: 1px dashed rgba(143, 195, 255, 0.42);
        outline-offset: -8px;
        background-image: linear-gradient(135deg, rgba(87, 166, 255, 0.08), transparent 58%);
    }

    .collection-card.is-drop-target {
        background: rgba(87, 166, 255, 0.12);
        border-color: rgba(143, 195, 255, 0.75);
        box-shadow: 0 18px 42px rgba(87, 166, 255, 0.12);
        transform: translateY(-2px);
    }

    .collection-card.is-drop-saving {
        opacity: 0.7;
        pointer-events: none;
    }

    .collection-icon {
        background: rgba(87, 166, 255, 0.12);
        color: #8fc3ff;
    }

    .quiz-name {
        font-size: 20px;
        font-weight: 800;
        letter-spacing: -0.02em;
        margin: 20px 0 6px;
    }

    .quiz-languages {
        color: var(--on-surface-var);
        font-size: 14px;
        font-weight: 600;
    }

    .quiz-meta {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
        margin-top: 28px;
        color: rgba(188, 203, 185, 0.7);
        font-size: 12px;
        font-weight: 700;
    }

    .status-pill {
        color: var(--primary);
        background: rgba(83, 224, 118, 0.1);
        border-radius: 9999px;
        padding: 5px 10px;
    }

    .delete-form {
        margin: 18px 0 0;
    }

    .btn-delete {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 6px;
        min-height: 36px;
        border: 1px solid rgba(255, 96, 96, 0.28);
        border-radius: 9999px;
        background: rgba(255, 96, 96, 0.08);
        color: #ffb4b4;
        cursor: pointer;
        font-size: 12px;
        font-weight: 800;
        padding: 0 12px;
    }

    .btn-delete .material-symbols-outlined {
        font-size: 18px;
    }

    .btn-delete:hover {
        background: rgba(255, 96, 96, 0.16);
        border-color: rgba(255, 96, 96, 0.48);
    }

    .page-message {
        border-radius: 8px;
        background: rgba(83, 224, 118, 0.12);
        color: var(--primary);
        font-size: 13px;
        font-weight: 750;
        padding: 12px 14px;
    }

    .empty-state {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        min-height: 360px;
        gap: 18px;
        text-align: center;
        background: var(--surface);
        border: 1px dashed rgba(83, 224, 118, 0.35);
        border-radius: 8px;
        padding: 48px 24px;
    }

    .empty-icon {
        width: 64px;
        height: 64px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: rgba(83, 224, 118, 0.1);
        color: var(--primary);
        border-radius: 9999px;
    }

    .empty-title {
        font-size: 24px;
        font-weight: 850;
        margin: 0;
    }

    .empty-copy {
        color: var(--on-surface-var);
        max-width: 420px;
        margin: 0;
    }

    .modal-backdrop {
        display: none;
        position: fixed;
        inset: 0;
        z-index: 100;
        align-items: center;
        justify-content: center;
        padding: 24px;
        background: rgba(1, 14, 36, 0.82);
        backdrop-filter: blur(8px);
    }

    .modal-backdrop.open { display: flex; }

    .modal {
        width: 100%;
        max-width: 500px;
        background: var(--surface);
        border: 1px solid rgba(61, 74, 61, 0.35);
        border-radius: 8px;
        padding: 32px;
        box-shadow: 0 32px 80px rgba(0, 0, 0, 0.5);
    }

    .modal-title {
        font-size: 24px;
        font-weight: 850;
        letter-spacing: -0.02em;
        margin: 0 0 24px;
    }

    .form-group { margin-bottom: 16px; }
    .form-label {
        display: block;
        color: var(--on-surface-var);
        font-size: 11px;
        font-weight: 800;
        letter-spacing: 0.08em;
        text-transform: uppercase;
        margin-bottom: 8px;
    }

    .form-input,
    .select-input {
        width: 100%;
        background: var(--surface-highest);
        color: var(--on-surface);
        border: none;
        border-radius: 9999px;
        padding: 13px 18px;
        font: inherit;
        outline: none;
    }

    .form-input:focus,
    .select-input:focus { box-shadow: 0 0 0 2px var(--primary); }

    .modal-actions {
        display: flex;
        justify-content: flex-end;
        gap: 12px;
        margin-top: 28px;
    }

    .btn-cancel,
    .btn-create {
        border: none;
        border-radius: 9999px;
        padding: 12px 24px;
        font-weight: 800;
        cursor: pointer;
    }

    .btn-cancel { background: var(--surface-highest); color: var(--on-surface-var); }
    .btn-create { background: var(--primary-container); color: var(--on-primary); }

    @media (max-width: 720px) {
        .select-header {
            align-items: flex-start;
            flex-direction: column;
        }

        .select-title { font-size: 32px; }
        .select-actions,
        .empty-actions,
        .btn-new-quiz { width: 100%; justify-content: center; }
    }

/* Extracted from Glosify/Views/Quiz/start-quiz-settings.cshtml */
.settings-shell {
        display: grid;
        gap: 28px;
        padding-bottom: 48px;
    }

    .settings-header {
        display: grid;
        gap: 10px;
        max-width: 880px;
    }

    .config-badge {
        width: fit-content;
        border-radius: 9999px;
        background: rgba(83, 224, 118, 0.12);
        color: var(--primary);
        font-size: 11px;
        font-weight: 850;
        letter-spacing: 0.12em;
        padding: 6px 12px;
        text-transform: uppercase;
    }

    .page-title {
        font-size: 40px;
        font-weight: 900;
        letter-spacing: -0.03em;
        line-height: 1.08;
        margin: 0;
    }

    .page-subtitle {
        color: var(--on-surface-var);
        font-size: 16px;
        margin: 0;
    }

    .settings-grid {
        display: grid;
        grid-template-columns: minmax(0, 2fr) minmax(280px, 1fr);
        gap: 24px;
    }

    .settings-panel,
    .start-panel {
        background: var(--surface);
        border: 1px solid rgba(61, 74, 61, 0.28);
        border-radius: 8px;
        padding: 28px;
    }

    .settings-panel {
        display: grid;
        gap: 28px;
    }

    .section-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
        margin-bottom: 16px;
    }

    .section-title {
        font-size: 18px;
        font-weight: 850;
        margin: 0;
    }

    .section-note {
        color: var(--on-surface-var);
        font-size: 13px;
        margin: 3px 0 0;
    }

    .length-grid,
    .mode-grid {
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 14px;
    }

    .choice input {
        position: absolute;
        opacity: 0;
        pointer-events: none;
    }

    .choice-card {
        min-height: 112px;
        display: grid;
        place-items: center;
        gap: 8px;
        border: 1px solid rgba(61, 74, 61, 0.28);
        border-radius: 8px;
        background: var(--surface-low);
        color: var(--on-surface);
        cursor: pointer;
        padding: 20px;
        text-align: center;
        transition: background 0.2s, border-color 0.2s, transform 0.2s;
    }

    .choice-card:hover {
        transform: translateY(-1px);
        border-color: rgba(83, 224, 118, 0.5);
        background: var(--surface-high);
    }

    .choice input:checked + .choice-card {
        border-color: rgba(83, 224, 118, 0.75);
        background: rgba(83, 224, 118, 0.12);
    }

    .choice-card .num {
        color: var(--primary);
        font-size: 28px;
        font-weight: 900;
        line-height: 1;
    }

    .choice-card .label,
    .mode-name {
        font-size: 13px;
        font-weight: 800;
    }

    .choice-card .material-symbols-outlined {
        color: var(--primary);
        font-size: 34px;
    }

    .start-panel {
        display: flex;
        flex-direction: column;
        gap: 18px;
        align-self: start;
    }

    .stat-row {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
        padding: 14px 0;
        border-bottom: 1px solid rgba(61, 74, 61, 0.22);
    }

    .stat-row span:first-child {
        color: var(--on-surface-var);
        font-weight: 700;
    }

    .stat-row span:last-child {
        font-weight: 850;
    }

    .btn-start {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 10px;
        width: 100%;
        border: none;
        border-radius: 9999px;
        background: var(--primary-container);
        color: var(--on-primary);
        cursor: pointer;
        font-size: 18px;
        font-weight: 900;
        padding: 18px 22px;
    }

    .btn-start:disabled {
        cursor: not-allowed;
        filter: grayscale(1);
        opacity: 0.58;
    }

    .empty-callout {
        border: 1px dashed rgba(255, 180, 171, 0.38);
        border-radius: 8px;
        color: var(--error);
        font-size: 14px;
        font-weight: 700;
        line-height: 1.45;
        padding: 16px;
    }

    .range-presets {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
        margin-bottom: 18px;
    }

    .range-preset {
        border: 1px solid rgba(61, 74, 61, 0.28);
        border-radius: 9999px;
        background: var(--surface-low);
        color: var(--on-surface);
        cursor: pointer;
        font-size: 12px;
        font-weight: 800;
        padding: 6px 14px;
        transition: background 0.2s, border-color 0.2s;
    }

    .range-preset:hover {
        border-color: rgba(83, 224, 118, 0.5);
        background: var(--surface-high);
    }

    .range-slider {
        position: relative;
        height: 32px;
        margin: 4px 2px 2px;
    }

    .range-slider-track {
        position: absolute;
        top: 50%;
        left: 0;
        right: 0;
        height: 6px;
        margin-top: -3px;
        background: var(--surface-low);
        border-radius: 9999px;
    }

    .range-slider-fill {
        position: absolute;
        top: 0;
        bottom: 0;
        background: var(--primary);
        border-radius: 9999px;
    }

    .range-thumb {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 32px;
        margin: 0;
        background: transparent;
        -webkit-appearance: none;
        appearance: none;
        pointer-events: none;
    }

    .range-thumb::-webkit-slider-runnable-track {
        background: transparent;
    }

    .range-thumb::-moz-range-track {
        background: transparent;
        border: none;
    }

    .range-thumb::-webkit-slider-thumb {
        -webkit-appearance: none;
        appearance: none;
        pointer-events: auto;
        width: 20px;
        height: 20px;
        border-radius: 9999px;
        background: var(--primary);
        border: 3px solid var(--surface);
        box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
        cursor: pointer;
    }

    .range-thumb::-moz-range-thumb {
        pointer-events: auto;
        width: 20px;
        height: 20px;
        border-radius: 9999px;
        background: var(--primary);
        border: 3px solid var(--surface);
        box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
        cursor: pointer;
    }

    .range-thumb-max {
        z-index: 4;
    }

    .range-thumb-min {
        z-index: 3;
    }

    .range-slider-label {
        color: var(--on-surface-var);
        font-size: 13px;
        margin: 10px 0 0;
    }

    .range-slider:has(.range-thumb:disabled) {
        opacity: 0.45;
        pointer-events: none;
    }

    .range-presets:has(+ .range-slider .range-thumb:disabled) {
        opacity: 0.45;
        pointer-events: none;
    }

    .word-picker-row {
        display: flex;
        align-items: center;
        flex-wrap: wrap;
        gap: 12px;
        margin-top: 18px;
    }

    .word-picker-summary {
        color: var(--primary);
        font-size: 13px;
        font-weight: 800;
    }

    .word-picker-clear {
        border: none;
        background: none;
        color: var(--on-surface-var);
        cursor: pointer;
        font-size: 13px;
        font-weight: 700;
        padding: 0;
        text-decoration: underline;
    }

    .word-picker-clear:hover {
        color: var(--on-surface);
    }

    .word-picker-dialog {
        background: var(--surface);
        border: 1px solid rgba(61, 74, 61, 0.28);
        border-radius: 12px;
        color: var(--on-surface);
        padding: 0;
        width: min(560px, 92vw);
        max-height: 80vh;
    }

    .word-picker-dialog::backdrop {
        background: rgba(4, 8, 6, 0.6);
        backdrop-filter: blur(2px);
    }

    .word-picker-header {
        align-items: center;
        border-bottom: 1px solid rgba(61, 74, 61, 0.28);
        display: flex;
        justify-content: space-between;
        padding: 18px 22px;
    }

    .word-picker-header h3 {
        font-size: 17px;
        font-weight: 850;
        margin: 0;
    }

    .word-picker-toolbar {
        align-items: center;
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        padding: 16px 22px 0;
    }

    .word-picker-search {
        background: var(--surface-low);
        border: 1px solid rgba(61, 74, 61, 0.28);
        border-radius: 9999px;
        color: var(--on-surface);
        flex: 1;
        min-width: 140px;
        padding: 7px 14px;
        font-size: 13px;
    }

    .word-picker-count {
        color: var(--on-surface-var);
        font-size: 12px;
        font-weight: 700;
        white-space: nowrap;
    }

    .word-picker-list {
        display: grid;
        gap: 4px;
        max-height: 45vh;
        overflow-y: auto;
        padding: 14px 22px;
    }

    .word-picker-item {
        align-items: center;
        border-radius: 8px;
        cursor: pointer;
        display: grid;
        gap: 12px;
        grid-template-columns: auto 1fr 1fr;
        padding: 8px 10px;
    }

    .word-picker-item:hover {
        background: var(--surface-low);
    }

    .word-picker-lemma {
        font-weight: 800;
    }

    .word-picker-translation {
        color: var(--on-surface-var);
    }

    .word-picker-footer {
        border-top: 1px solid rgba(61, 74, 61, 0.28);
        padding: 16px 22px;
    }

    .word-picker-footer .btn-start {
        width: auto;
        padding: 12px 24px;
        font-size: 15px;
    }

    @media (max-width: 900px) {
        .settings-grid,
        .length-grid,
        .mode-grid {
            grid-template-columns: 1fr;
        }
    }

/* Extracted from Glosify/Views/Quiz/typewordquiz.cshtml */
.main-content { flex: 1; display: flex; flex-direction: column; position: relative; overflow-y: auto; height: 100vh; }

    /* ── Topbar ── */
    .topbar { position: sticky; top: 0; width: 100%; z-index: 40; background: rgba(4,19,41,0.8); backdrop-filter: blur(30px); display: flex; align-items: center; justify-content: space-between; padding: 0 32px; height: 80px; }
    .topbar-left { display: flex; align-items: center; gap: 32px; }
    .topbar-logo { font-size: 22px; font-weight: 900; color: var(--primary-container); letter-spacing: -0.05em; }
    .topbar-right { display: flex; align-items: center; gap: 24px; }
    .btn-icon { background: none; border: none; cursor: pointer; color: #94a3b8; transition: color 0.3s; }
    .btn-icon:hover { color: white; }
    .topbar-avatar { width: 40px; height: 40px; border-radius: 9999px; overflow: hidden; border: 2px solid var(--primary-container); }
    .topbar-avatar img { width: 100%; height: 100%; object-fit: cover; }

    /* ── Quiz section ── */
    .quiz-section { flex: 1; display: flex; flex-direction: column; align-items: center; padding: 48px 32px; }

    .progress-wrap { width: 100%; max-width: 896px; margin-bottom: 48px; }
    .progress-header { display: flex; justify-content: space-between; align-items: flex-end; margin-bottom: 16px; }
    .progress-label { font-size: 11px; text-transform: uppercase; letter-spacing: 0.15em; color: var(--primary); font-weight: 700; }
    .progress-title { font-size: 20px; font-weight: 800; color: white; }
    .progress-count { color: #94a3b8; font-weight: 700; }
    .progress-track { height: 8px; width: 100%; background: var(--surface-highest); border-radius: 9999px; overflow: hidden; }
    .progress-fill { height: 100%; width: 70%; background: linear-gradient(to right, var(--primary), var(--primary-container)); border-radius: 9999px; transition: width 0.5s; }

    .quiz-card { width: 100%; max-width: 672px; background: var(--surface); border-radius: 16px; padding: 48px; position: relative; overflow: hidden; display: flex; flex-direction: column; align-items: center; box-shadow: 0 40px 80px rgba(1,14,36,0.3); }
    .card-glow-tr { position: absolute; top: -96px; right: -96px; width: 256px; height: 256px; background: rgba(29,185,84,0.05); border-radius: 9999px; filter: blur(48px); }
    .card-glow-bl { position: absolute; bottom: -96px; left: -96px; width: 256px; height: 256px; background: rgba(83,224,118,0.05); border-radius: 9999px; filter: blur(48px); }

    .prompt { text-align: center; margin-bottom: 40px; position: relative; z-index: 1; }
    .prompt-badge { display: inline-block; background: rgba(29,185,84,0.1); color: var(--primary-container); padding: 4px 16px; border-radius: 9999px; font-size: 10px; text-transform: uppercase; letter-spacing: -0.03em; font-weight: 900; margin-bottom: 16px; }
    .prompt-word { font-size: 36px; font-weight: 800; color: white; line-height: 1.2; }
    .prompt-hint { color: #94a3b8; margin-top: 8px; font-size: 14px; font-style: italic; }

    .action-bar { display: flex; gap: 16px; margin-bottom: 32px; position: relative; z-index: 1; }
    .btn-action { width: 48px; height: 48px; border-radius: 9999px; background: var(--surface-highest); display: flex; align-items: center; justify-content: center; border: none; cursor: pointer; transition: transform 0.2s; }
    .btn-action.primary { color: var(--primary); }
    .btn-action.muted { color: #94a3b8; }
    .btn-action:hover { transform: scale(1.1); }
    .btn-action:active { transform: scale(0.95); }

    .answer-input-wrap { width: 100%; margin-bottom: 32px; position: relative; z-index: 1; }
    .answer-input { width: 100%; background: var(--surface-low); border: none; border-radius: 12px; padding: 24px 32px; font-size: 24px; font-weight: 500; color: white; font-family: inherit; text-align: center; outline: none; transition: box-shadow 0.2s; }
    .answer-input::placeholder { color: #475569; }
    .answer-input:focus { box-shadow: 0 0 0 2px rgba(29,185,84,0.5); }

    .btn-check { width: 100%; padding: 20px; background: var(--primary-container); color: var(--on-primary); font-weight: 900; font-size: 18px; border-radius: 9999px; display: flex; align-items: center; justify-content: center; gap: 12px; border: none; cursor: pointer; position: relative; z-index: 1; box-shadow: 0 10px 30px rgba(29,185,84,0.4); transition: transform 0.2s; }
    .btn-check:hover { transform: scale(1.02); }
    .btn-check:active { transform: scale(0.95); }

    .stats-grid { width: 100%; max-width: 896px; margin-top: 48px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
    .stat-card { background: var(--surface-low); padding: 24px; border-radius: 8px; display: flex; align-items: center; gap: 16px; }
    .stat-card.highlight { border-left: 4px solid var(--primary); }
    .stat-icon { width: 48px; height: 48px; border-radius: 9999px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
    .stat-icon.primary-bg { background: rgba(83,224,118,0.1); color: var(--primary); }
    .stat-icon.muted-bg { background: var(--surface-highest); color: #94a3b8; }
    .stat-label { font-size: 11px; color: #64748b; text-transform: uppercase; letter-spacing: 0.1em; font-weight: 700; }
    .stat-value { font-size: 24px; font-weight: 900; color: white; margin-top: 2px; }

    @media (max-width: 768px) {
        .stats-grid { grid-template-columns: 1fr; }
    }

    .typing-shell {
        display: grid;
        gap: 30px;
        padding-bottom: 48px;
    }

    .typing-stage {
        display: grid;
        justify-items: center;
        gap: 20px;
    }

    .typing-card {
        width: min(100%, 720px);
        display: grid;
        gap: 18px;
        justify-items: center;
        border: 1px solid rgba(61, 74, 61, 0.28);
        border-radius: 8px;
        background: var(--surface);
        box-shadow: 0 28px 70px rgba(1, 14, 36, 0.34);
        padding: 38px;
        text-align: center;
        transition: border-color 0.2s ease, box-shadow 0.2s ease;
    }

    .typing-card.is-correct {
        border-color: rgba(83, 224, 118, 0.72);
        box-shadow: 0 28px 70px rgba(29, 185, 84, 0.16);
    }

    .typing-card.is-incorrect {
        border-color: rgba(255, 180, 171, 0.58);
    }

    .typing-prompt-label {
        color: var(--on-surface-var);
        font-size: 12px;
        font-weight: 850;
        letter-spacing: 0.12em;
        margin: 0;
        text-transform: uppercase;
    }

    .typing-prompt {
        font-size: clamp(34px, 7vw, 62px);
        font-weight: 900;
        line-height: 1.06;
        margin: 0;
        overflow-wrap: anywhere;
    }

    .typing-form {
        width: 100%;
        display: grid;
        gap: 16px;
    }

    .typing-form .answer-input {
        color: var(--on-surface);
        background-color: var(--surface-low);
    }

    .typing-feedback {
        min-height: 24px;
        color: var(--on-surface-var);
        font-size: 16px;
        font-weight: 850;
        margin: 0;
    }

    .typing-feedback.is-correct {
        color: var(--primary);
    }

    .typing-feedback.is-incorrect {
        color: var(--error);
    }

    .typing-reveal {
        width: 100%;
        display: grid;
        gap: 6px;
        border-radius: 8px;
        background: var(--surface-low);
        padding: 18px;
    }

    .typing-reveal[hidden] {
        display: none;
    }

    .typing-reveal span {
        color: var(--on-surface-var);
        font-size: 11px;
        font-weight: 850;
        letter-spacing: 0.1em;
        text-transform: uppercase;
    }

    .typing-reveal strong {
        color: var(--primary);
        font-size: 28px;
        font-weight: 900;
        overflow-wrap: anywhere;
    }

    .typing-reveal p {
        color: var(--on-surface-var);
        font-size: 14px;
        font-weight: 650;
        line-height: 1.5;
        margin: 0;
        overflow-wrap: anywhere;
    }

    .ukrainian-keyboard {
        width: min(100%, 720px);
        display: grid;
        gap: 8px;
        border: 1px solid rgba(61, 74, 61, 0.28);
        border-radius: 8px;
        background: var(--surface-low);
        padding: 14px;
    }

    .ukrainian-keyboard[hidden] {
        display: none;
    }

    .keyboard-row {
        display: grid;
        grid-template-columns: repeat(12, minmax(0, 1fr));
        gap: 8px;
    }

    .keyboard-row:nth-child(2) {
        grid-template-columns: repeat(11, minmax(0, 1fr));
        padding-inline: 18px;
    }

    .keyboard-row:nth-child(3) {
        grid-template-columns: repeat(11, minmax(0, 1fr));
    }

    .keyboard-row-actions {
        grid-template-columns: 3fr 1fr;
        padding-inline: 60px;
    }

    .keyboard-key {
        min-height: 44px;
        border: 1px solid rgba(83, 224, 118, 0.16);
        border-radius: 8px;
        background: var(--surface-high);
        color: var(--on-surface);
        cursor: pointer;
        font: inherit;
        font-size: 20px;
        font-weight: 850;
        transition: background 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
    }

    .keyboard-key:hover,
    .keyboard-key:focus-visible {
        background: rgba(83, 224, 118, 0.12);
        border-color: rgba(83, 224, 118, 0.46);
        outline: none;
        transform: translateY(-1px);
    }

    .keyboard-key-wide {
        font-size: 14px;
        letter-spacing: 0.04em;
        text-transform: uppercase;
    }

    .typing-shell .results:not([hidden]) {
        display: grid;
        gap: 18px;
        justify-self: center;
    }

    .typing-result-actions {
        display: grid;
        gap: 12px;
    }

    @media (max-width: 700px) {
        .typing-card {
            padding: 28px 18px;
        }

        .keyboard-row,
        .keyboard-row:nth-child(2),
        .keyboard-row:nth-child(3) {
            grid-template-columns: repeat(6, minmax(0, 1fr));
            padding-inline: 0;
        }

        .keyboard-row-actions {
            grid-template-columns: 1fr 72px;
        }

        .keyboard-key {
            min-height: 42px;
            font-size: 18px;
        }
    }

/* Extracted from Glosify/Views/Shared/_AppLayout.cshtml */
:root {
            --bg: #041329;
            --surface-lowest: #010e24;
            --surface-low: #0d1c32;
            --surface: #112036;
            --surface-high: #1c2a41;
            --surface-highest: #27354c;
            --surface-bright: #2c3951;
            --on-surface: #d6e3ff;
            --on-surface-var: #bccbb9;
            --primary: #53e076;
            --primary-container: #1db954;
            --on-primary: #003914;
            --on-primary-container: #004118;
            --error: #ffb4ab;
            --outline-var: #3d4a3d;
        }
        body {
            font-family: 'Plus Jakarta Sans', sans-serif;
            background-color: #041329;
        }
        .material-symbols-outlined {
            font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
        }
        .glass-player {
            background: rgba(17, 32, 54, 0.9);
            backdrop-filter: blur(40px);
        }

*, *::before, *::after { box-sizing: border-box; }

body { margin: 0; }

        ::-webkit-scrollbar { width: 6px; }
        ::-webkit-scrollbar-track { background: var(--surface-lowest); }
        ::-webkit-scrollbar-thumb { background: var(--surface-highest); border-radius: 10px; }

        .material-symbols-outlined {
            font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
        }

        /* ── Sidebar ── */
        .sidebar {
            width: 256px;
            height: 100vh;
            background: var(--surface-lowest);
            display: flex;
            flex-direction: column;
            padding: 24px 0;
            flex-shrink: 0;
            position: sticky;
            top: 0;
            z-index: 50;
        }

        .sidebar-brand { padding: 0 32px 48px; }
        .sidebar-brand h1 {
            color: var(--primary-container);
            font-size: 22px;
            font-weight: 900;
            font-style: italic;
            letter-spacing: -0.05em;
        }
        .sidebar-brand p {
            color: var(--on-surface-var);
            font-size: 11px;
            text-transform: uppercase;
            letter-spacing: 0.15em;
            font-weight: 700;
            margin-top: 4px;
        }

        .sidebar nav {
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 4px;
            padding: 0 16px;
            overflow-y: auto;
        }

        .nav-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            color: var(--surface-highest);
            text-decoration: none;
            border-radius: 9999px;
            font-size: 14px;
            font-weight: 500;
            transition: color 0.2s, background 0.2s;
        }
        .nav-item:hover { color: var(--primary); background: var(--surface); }
        .nav-item.active { background: var(--surface); color: var(--primary-container); font-weight: 700; }

        .sidebar-bottom { padding: 0 24px; margin-top: 16px; }

        .btn-sidebar-cta {
            width: 100%;
            background: var(--primary-container);
            color: var(--on-primary);
            padding: 12px;
            border-radius: 9999px;
            font-weight: 700;
            font-size: 14px;
            border: none;
            cursor: pointer;
            transition: transform 0.2s;
            box-shadow: 0 4px 15px rgba(29,185,84,0.15);
        }
        .btn-sidebar-cta:hover { transform: scale(1.05); }
        .btn-sidebar-cta:active { transform: scale(0.95); }

        .sidebar-footer-links {
            margin-top: 24px;
            padding-top: 24px;
            border-top: 1px solid rgba(61,74,61,0.4);
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .sidebar-footer-links a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 8px 16px;
            color: var(--surface-highest);
            text-decoration: none;
            font-size: 12px;
            font-weight: 500;
            transition: color 0.2s;
        }
        .sidebar-footer-links a:hover { color: var(--primary); }
        .sidebar-footer-links .material-symbols-outlined { font-size: 18px; }

        /* ── Page wrapper (sits next to sidebar) ── */
        .page-wrapper {
            flex: 1;
            display: flex;
            flex-direction: column;
            height: 100vh;
            overflow: hidden;
            min-width: 0;
        }

/* =============================================================
   Auth shell (Login / Register / Forgot Password)
   ============================================================= */
.auth-body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    font-family: var(--font-body);
    color: var(--on-surface);
    background: var(--background);
}

.auth-halos {
    position: fixed;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
    z-index: 0;
}

.auth-halo {
    position: absolute;
    border-radius: 9999px;
    filter: blur(120px);
}

.auth-halo-tl {
    top: -10%;
    left: -10%;
    width: 40%;
    height: 40%;
    background: rgba(83, 224, 118, 0.10);
}

.auth-halo-br {
    bottom: -10%;
    right: -10%;
    width: 50%;
    height: 50%;
    background: rgba(39, 53, 76, 0.40);
}

.auth-shell {
    position: relative;
    width: 100%;
    max-width: 480px;
    z-index: 1;
}

.brand-stack {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    margin-bottom: 40px;
}

.brand-orb {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    background: var(--primary-container);
    color: var(--on-primary-container);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    box-shadow: 0 0 30px rgba(29, 185, 84, 0.30);
}

.brand-orb .material-symbols-outlined { font-size: 36px; }

.brand-stack h1 {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 36px;
    letter-spacing: -0.03em;
    margin: 0 0 8px;
    color: var(--on-background);
}

.brand-stack .brand-tagline {
    color: var(--on-surface-var);
    font-weight: 500;
    letter-spacing: -0.01em;
    margin: 0;
}

.glass-card {
    background: rgba(17, 32, 54, 0.78);
    backdrop-filter: blur(40px);
    -webkit-backdrop-filter: blur(40px);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 24px;
    padding: 48px 44px;
    box-shadow: var(--shadow-pop);
}

.glass-card.is-centered { text-align: center; }

.auth-card-header {
    margin-bottom: 32px;
}

.auth-card-header h2 {
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--on-surface);
    margin: 0 0 8px;
}

.auth-card-header p {
    color: var(--on-surface-var);
    font-size: 14px;
    margin: 0;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.field {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.field-label {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--on-surface-var);
    margin-left: 4px;
}

.field-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 4px;
}

.field-link {
    font-size: 11px;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
    transition: color var(--dur-fast) var(--ease-standard);
}

.field-link:hover { color: var(--primary-fixed); }

.field-input {
    width: 100%;
    background: var(--surface-container-lowest);
    border: 1px solid transparent;
    border-radius: 12px;
    padding: 16px 20px;
    font: inherit;
    font-size: 14px;
    color: var(--on-surface);
    box-sizing: border-box;
    transition: border-color var(--dur-fast) var(--ease-standard), box-shadow var(--dur-fast) var(--ease-standard);
}

.field-input::placeholder { color: var(--outline); }

.field-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(83, 224, 118, 0.18);
}

.btn-primary-pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    border: 0;
    border-radius: var(--radius-full);
    background: var(--primary-container);
    color: var(--on-primary);
    font: inherit;
    font-weight: 800;
    font-size: 15px;
    padding: 16px 24px;
    cursor: pointer;
    box-shadow: 0 10px 30px rgba(29, 185, 84, 0.20);
    transition: transform var(--dur-fast) var(--ease-standard), box-shadow var(--dur-fast) var(--ease-standard);
}

.btn-primary-pill:hover {
    transform: scale(1.02);
    box-shadow: 0 14px 38px rgba(29, 185, 84, 0.30);
}

.btn-primary-pill:active { transform: scale(0.98); }

.btn-primary-pill .material-symbols-outlined { font-size: 20px; }

.auth-divider {
    position: relative;
    margin: 36px 0;
    text-align: center;
}

.auth-divider::before {
    content: "";
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: rgba(255, 255, 255, 0.08);
}

.auth-divider span {
    position: relative;
    background: #182336;
    padding: 0 16px;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--outline);
}

.btn-social {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 100%;
    background: var(--surface-container-highest);
    color: var(--on-surface);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 14px 20px;
    font: inherit;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: background var(--dur-fast) var(--ease-standard), border-color var(--dur-fast) var(--ease-standard);
}

.btn-social:hover {
    background: var(--surface-bright);
    border-color: rgba(255, 255, 255, 0.10);
}

.external-login-stack {
    display: grid;
    gap: 0.75rem;
}

.btn-social img { width: 20px; height: 20px; display: block; }

.btn-social-form { margin: 0; }

.auth-footer {
    margin-top: 32px;
    text-align: center;
    color: var(--on-surface-var);
    font-size: 14px;
}

.auth-footer a {
    color: var(--primary);
    font-weight: 700;
    text-decoration: none;
    margin-left: 4px;
}

.auth-footer a:hover { text-decoration: underline; }

.auth-error {
    margin-bottom: 24px;
    padding: 12px 16px;
    border: 1px solid rgba(255, 180, 171, 0.32);
    border-radius: 12px;
    background: rgba(255, 180, 171, 0.08);
    color: var(--error);
    font-size: 13px;
    line-height: 1.5;
}

.auth-error > div + div { margin-top: 4px; }

.auth-icon-hero {
    color: var(--primary);
    font-size: 44px;
    margin-bottom: 16px;
    display: inline-block;
}

.legal-links {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-top: 40px;
    opacity: 0.45;
    list-style: none;
    padding: 0;
}

.legal-links a {
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--on-surface-var);
    text-decoration: none;
}

.back-to-login {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary);
    font-weight: 700;
    text-decoration: none;
}

.back-to-login:hover { text-decoration: underline; }

.back-to-login .material-symbols-outlined { font-size: 18px; }

@media (max-width: 540px) {
    .auth-body {
        align-items: flex-start;
        padding: 16px 14px;
    }

    .brand-stack {
        margin-bottom: 20px;
    }

    .brand-orb {
        width: 48px;
        height: 48px;
        margin-bottom: 14px;
    }

    .brand-orb .material-symbols-outlined {
        font-size: 30px;
    }

    .brand-stack h1 {
        font-size: 30px;
    }

    .glass-card {
        border-radius: 18px;
        padding: 26px 20px;
    }

    .auth-card-header {
        margin-bottom: 22px;
    }

    .auth-card-header h2 {
        font-size: 22px;
    }

    .auth-form {
        gap: 16px;
    }

    .field-input {
        padding: 14px 16px;
    }

    .btn-primary-pill,
    .btn-social {
        min-height: 48px;
        padding: 13px 16px;
    }

    .auth-divider {
        margin: 22px 0;
    }

    .auth-footer {
        margin-top: 22px;
    }

    .legal-links {
        flex-wrap: wrap;
        gap: 12px 18px;
        margin-top: 24px;
    }
}

@media (max-width: 380px) {
    .auth-body {
        padding-inline: 10px;
    }

    .glass-card {
        padding: 22px 16px;
    }

    .auth-divider span {
        padding-inline: 10px;
    }
}

/* =============================================================
   Application shell (sidebar + topbar + canvas)
   ============================================================= */
.app-body {
    margin: 0;
    background: var(--background);
    color: var(--on-surface);
    font-family: var(--font-body);
    overflow-x: hidden;
}

.app-shell {
    display: flex;
    min-height: 100vh;
}

.app-sidebar {
    position: sticky;
    top: 0;
    width: 256px;
    height: 100vh;
    flex-shrink: 0;
    background: var(--surface);
    display: flex;
    flex-direction: column;
    padding: 32px 24px;
    z-index: 50;
    overflow-y: auto;
}

.app-sidebar-brand {
    margin-bottom: 40px;
}

.app-sidebar-brand .wordmark {
    font-size: 22px;
}

.app-sidebar-brand .brand-tier {
    color: var(--on-surface-var);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    font-weight: 700;
    margin: 4px 0 0;
}

.language-context-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 14px;
    padding: 6px 14px;
    border-radius: 9999px;
    font-size: 12px;
    font-weight: 700;
    text-decoration: none;
    transition: filter var(--dur-fast) var(--ease-standard);
}

.language-context-pill:hover { filter: brightness(1.1); }

.app-nav {
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex: 1;
}

.app-nav-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 16px;
    border-radius: 12px;
    color: var(--on-surface-var);
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    transition: background var(--dur-fast) var(--ease-standard), color var(--dur-fast) var(--ease-standard);
}

.app-nav-item:hover {
    color: var(--on-surface);
    background: var(--surface-container-high);
}

.app-nav-item.is-active {
    background: var(--secondary-container);
    color: var(--primary);
}

.app-nav-item.is-active .material-symbols-outlined {
    font-variation-settings: 'FILL' 1, 'wght' 500, 'GRAD' 0, 'opsz' 24;
}

.nav-svg-icon {
    width: 20px;
    height: 20px;
    flex: 0 0 20px;
}

.app-sidebar-cta {
    margin-top: 24px;
    width: 100%;
    background: var(--primary-container);
    color: var(--on-primary);
    padding: 14px;
    border: 0;
    border-radius: 9999px;
    font: inherit;
    font-weight: 800;
    font-size: 14px;
    cursor: pointer;
    box-shadow: 0 8px 24px rgba(29, 185, 84, 0.18);
    transition: transform var(--dur-fast) var(--ease-standard);
}

.app-sidebar-cta:hover { transform: scale(1.02); }
.app-sidebar-cta:active { transform: scale(0.98); }

.app-main {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
}

.app-topbar {
    position: sticky;
    top: 0;
    z-index: 40;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 14px 32px;
    background: rgba(4, 19, 41, 0.72);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
}

.app-search {
    flex: 1;
    max-width: 480px;
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--surface-container-high);
    border-radius: 9999px;
    padding: 8px 16px;
}

.app-search .material-symbols-outlined {
    color: var(--on-surface-var);
    font-size: 20px;
}

.app-search input {
    flex: 1;
    background: transparent;
    border: 0;
    outline: none;
    color: var(--on-surface);
    font: inherit;
    font-size: 14px;
}

.app-search input::placeholder { color: var(--outline); }

.app-topbar-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.icon-button {
    width: 40px;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 0;
    border-radius: 9999px;
    background: transparent;
    color: var(--on-surface-var);
    cursor: pointer;
    text-decoration: none;
    transition: background var(--dur-fast) var(--ease-standard), color var(--dur-fast) var(--ease-standard);
}

.icon-button:hover {
    background: var(--surface-container-high);
    color: var(--on-surface);
}

.icon-button .material-symbols-outlined { font-size: 22px; }

.credit-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    min-height: 36px;
    padding: 0 12px;
    border: 1px solid color-mix(in srgb, var(--outline-variant) 72%, transparent);
    border-radius: 9999px;
    background: var(--surface-container-low);
    color: var(--on-surface);
    font-size: 13px;
    font-weight: 800;
    line-height: 1;
    text-decoration: none;
    white-space: nowrap;
}

.credit-pill .material-symbols-outlined {
    font-size: 18px;
    color: var(--primary);
}

.credit-pill:hover {
    color: var(--on-surface);
    background: var(--surface-container-high);
}

.account-block {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
}

.account-meta {
    display: none;
    flex-direction: column;
    align-items: flex-end;
    min-width: 0;
}

.account-meta-eyebrow {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    color: var(--outline);
    font-weight: 700;
}

.account-meta-email {
    font-size: 13px;
    color: var(--on-surface);
    max-width: 220px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

@media (min-width: 1024px) {
    .account-meta { display: flex; }
}

.account-avatar {
    width: 36px;
    height: 36px;
    border-radius: 9999px;
    background: var(--surface-container-highest);
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.account-avatar .material-symbols-outlined { font-size: 22px; }

.btn-login {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: 9999px;
    background: var(--primary-container);
    color: var(--on-primary);
    font-weight: 800;
    font-size: 14px;
    text-decoration: none;
}

.btn-login .material-symbols-outlined { font-size: 20px; }

.app-canvas {
    flex: 1;
    padding: 32px 32px 64px;
    width: 100%;
}

.app-mobile-brand,
.app-mobile-nav {
    display: none;
}

@media (max-width: 900px) {
    .app-body {
        padding-bottom: calc(64px + env(safe-area-inset-bottom));
    }

    .app-sidebar {
        position: fixed;
        transform: translateX(-100%);
        transition: transform var(--dur-base) var(--ease-standard);
    }

    .app-mobile-brand {
        display: inline-flex;
        color: var(--primary);
        font-family: var(--font-display);
        font-size: 18px;
        font-style: italic;
        font-weight: 850;
        letter-spacing: 0;
        line-height: 1;
        text-decoration: none;
        white-space: nowrap;
    }

    .app-canvas { padding: 24px 18px 32px; }

    .app-topbar { padding: 12px 18px; }

    .app-search {
        max-width: none;
        min-width: 0;
    }

    .app-topbar-right {
        flex-shrink: 0;
    }

    .app-mobile-nav {
        position: fixed;
        left: 0;
        right: 0;
        bottom: 0;
        z-index: 80;
        display: grid;
        grid-auto-flow: column;
        grid-auto-columns: minmax(0, 1fr);
        gap: 2px;
        padding: 6px max(8px, env(safe-area-inset-left)) calc(6px + env(safe-area-inset-bottom)) max(8px, env(safe-area-inset-right));
        border-top: 1px solid rgba(61, 74, 61, 0.42);
        background: rgba(4, 19, 41, 0.94);
        backdrop-filter: blur(22px);
        -webkit-backdrop-filter: blur(22px);
    }

    .app-mobile-nav a,
    .app-mobile-nav .app-nav-item {
        min-width: 0;
        min-height: 50px;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 3px;
        border-radius: 8px;
        color: var(--on-surface-var);
        font-size: 10px;
        font-weight: 800;
        line-height: 1.1;
        padding: 4px 2px;
        text-align: center;
        text-decoration: none;
    }

    .app-mobile-nav a > span:last-child {
        max-width: 100%;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .app-mobile-nav a.is-active,
    .app-mobile-nav .app-nav-item.is-active {
        background: rgba(83, 224, 118, 0.12);
        color: var(--primary);
    }

    .app-mobile-nav .nav-svg-icon,
    .app-mobile-nav .material-symbols-outlined {
        width: 20px;
        height: 20px;
        flex: 0 0 auto;
        font-size: 20px;
    }
}

@media (max-width: 700px) {
    .app-topbar {
        gap: 12px;
    }

    .app-search,
    .app-topbar-right .icon-button:not([title="Log out"]) {
        display: none;
    }

    .app-topbar .account-avatar {
        display: none;
    }

    .btn-login {
        min-height: 38px;
        padding: 8px 12px;
    }

    .language-page {
        gap: 32px;
        padding-bottom: 28px;
    }

    .language-tagline {
        font-size: 30px;
    }

    .language-card {
        gap: 16px;
        padding: 26px 18px;
    }

    .workspace,
    .select-quiz-page,
    .settings-shell,
    .flash-shell,
    .typing-shell,
    .detail-page {
        gap: 22px;
        padding-bottom: 28px;
    }

    .workspace-hero {
        min-height: 0;
        padding: 28px 20px;
    }

    .hero-title,
    .select-title,
    .page-title,
    .flash-title {
        font-size: 30px;
        letter-spacing: 0;
    }

    .hero-actions {
        display: grid;
        gap: 10px;
    }

    .scan-toolbar {
        align-items: stretch;
        flex-direction: column;
        gap: 8px;
    }

    .btn-scan-text {
        width: 100%;
    }

    .btn-hero,
    .btn-submit,
    .btn-start,
    .btn-main,
    .btn-check {
        width: 100%;
        min-height: 48px;
        padding-inline: 16px;
    }

    .panel,
    .settings-panel,
    .start-panel,
    .modal,
    .detail-section,
    .meta-panel {
        padding: 20px;
    }

    .collection-header,
    .select-header,
    .detail-topbar,
    .progress-meta {
        align-items: stretch;
        flex-direction: column;
    }

    .tab-group,
    .detail-actions,
    .modal-actions {
        width: 100%;
    }

    .tab {
        flex: 1;
        padding-inline: 12px;
    }

    .word-grid,
    .sentence-grid,
    .quiz-grid {
        grid-template-columns: 1fr;
    }

    .word-card {
        align-items: stretch;
        flex-direction: column;
        gap: 14px;
        padding: 18px;
    }

    .word-actions {
        justify-content: space-between;
        width: 100%;
    }

    .sentence-card-top {
        gap: 12px;
    }

    .detail-hero,
    .detail-grid {
        grid-template-columns: 1fr;
    }

    .hero-panel {
        padding: 24px 20px;
    }

    .detail-title {
        font-size: 34px;
    }

    .variant-row {
        grid-template-columns: 1fr;
    }

    .slot-table {
        display: block;
        overflow-x: auto;
    }

    .flashcard {
        min-height: 220px;
        padding: 24px 18px;
    }

    .typing-card {
        padding: 24px 16px;
    }

    .answer-input {
        font-size: 18px;
        padding: 18px 16px;
    }

    .table {
        display: block;
        width: 100%;
        overflow-x: auto;
        white-space: nowrap;
    }

    .row {
        display: block;
    }

    [class*="col-"] {
        max-width: 100%;
        width: 100%;
    }
}

@media (max-width: 430px) {
    .app-canvas {
        padding-inline: 12px;
    }

    .app-topbar {
        padding-inline: 12px;
    }

    .app-mobile-brand {
        font-size: 16px;
    }

    .btn-login span {
        display: none;
    }

    .language-brand {
        font-size: 22px;
    }

    .language-tagline {
        font-size: 26px;
    }

    .workspace-hero,
    .panel,
    .settings-panel,
    .start-panel,
    .modal,
    .detail-section,
    .meta-panel,
    .hero-panel {
        padding: 18px;
    }

    .modal-backdrop {
        align-items: flex-end;
        padding: 12px;
    }

    .modal-actions {
        flex-direction: column-reverse;
    }

    .btn-cancel,
    .btn-create,
    .edit-link {
        width: 100%;
        min-height: 44px;
    }

    .result-grid {
        grid-template-columns: 1fr;
    }
}

/* =============================================================
   Assistant chat panel
   ============================================================= */
.assistant-float {
    position: fixed;
    right: 28px;
    bottom: 28px;
    z-index: 1200;
    display: flex;
    align-items: flex-end;
    flex-direction: column;
    gap: 14px;
}

.assistant-fab {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    min-height: 56px;
    border: none;
    border-radius: 9999px;
    background: var(--primary-container, #1db954);
    color: var(--on-primary, #003914);
    box-shadow: 0 18px 42px rgba(0, 0, 0, 0.32);
    cursor: pointer;
    font: inherit;
    font-size: 14px;
    font-weight: 850;
    padding: 0 20px;
}

.assistant-fab .material-symbols-outlined {
    font-size: 24px;
}

.assistant-popover {
    order: -1;
    width: min(440px, calc(100vw - 32px));
    height: min(700px, calc(100vh - 112px));
    max-height: min(700px, calc(100vh - 112px));
    padding: 0;
    overflow: hidden;
    border: 1px solid var(--outline-variant, #3d4a3d);
    border-radius: 8px;
    background: var(--surface, #112036);
    color: var(--on-surface, #d6e3ff);
    box-shadow: 0 24px 70px rgba(0, 0, 0, 0.5);
}

.assistant-popover[hidden] {
    display: none;
}

.assistant-panel {
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.assistant-ide-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 38px;
    padding: 0 8px 0 10px;
    border-bottom: 1px solid rgba(61, 74, 61, 0.42);
    background: var(--surface-low, #0d1c32);
}

.assistant-tabs {
    display: flex;
    align-items: stretch;
    gap: 16px;
    height: 38px;
}

.assistant-tab {
    position: relative;
    border: 0;
    border-radius: 0;
    background: transparent;
    color: var(--on-surface-variant, #bccbb9);
    cursor: pointer;
    font: inherit;
    font-size: 11px;
    font-weight: 750;
    letter-spacing: 0;
    padding: 0;
}

.assistant-tab.is-active {
    color: var(--on-surface, #d6e3ff);
}

.assistant-tab.is-active::after {
    position: absolute;
    right: 0;
    bottom: 0;
    left: 0;
    height: 1px;
    background: var(--primary, #53e076);
    content: "";
}

.assistant-header-actions {
    display: inline-flex;
    align-items: center;
    gap: 2px;
}

.assistant-pane {
    display: flex;
    flex: 1 1 auto;
    min-height: 0;
    flex-direction: column;
}

.assistant-pane[hidden] {
    display: none;
}

.assistant-context {
    margin: 0;
    color: var(--on-surface-variant, #b8c2cf);
    font-size: 12px;
    font-weight: 750;
    line-height: 1.35;
}

.assistant-context-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    min-height: 28px;
    padding: 0 2px 7px;
}

.assistant-context-chip {
    display: inline-flex;
    align-items: center;
    min-width: 0;
    gap: 6px;
    color: var(--on-surface-variant, #bccbb9);
    font-size: 11px;
    font-weight: 700;
}

.assistant-context-chip span:last-child {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.assistant-context-chip .material-symbols-outlined {
    color: var(--primary, #53e076);
    font-size: 15px;
}

.assistant-context-picker {
    display: inline-flex;
    align-items: center;
    min-width: 0;
}

.assistant-context-picker .form-label {
    margin: 0;
    font-size: 12px;
}

.assistant-context-picker select {
    max-width: 150px;
    min-height: 28px;
    border: 0;
    border-radius: 5px;
    background: var(--surface-container-highest, #27354c);
    color: var(--on-surface, #d6e3ff);
    font: inherit;
    font-size: 11px;
    padding: 0 6px;
    text-overflow: ellipsis;
}

.assistant-context-picker select option,
.assistant-model-picker select option {
    background: var(--surface-container-highest, #27354c);
    color: var(--on-surface, #d6e3ff);
}

.assistant-reset,
.assistant-close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    flex: 0 0 auto;
    border: 0;
    border-radius: 4px;
    background: transparent;
    color: var(--on-surface-variant, #bccbb9);
    cursor: pointer;
}

.assistant-reset:hover,
.assistant-close:hover {
    background: rgba(255, 255, 255, 0.08);
    color: var(--on-surface, #d6e3ff);
}

.assistant-reset .material-symbols-outlined,
.assistant-close .material-symbols-outlined {
    font-size: 18px;
}

.assistant-transcript {
    display: flex;
    flex-direction: column;
    flex: 1 1 auto;
    gap: 12px;
    min-height: 0;
    overflow-y: auto;
    padding: 14px 12px;
    -webkit-overflow-scrolling: touch;
}

.assistant-chat-list-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 38px;
    padding: 7px 10px;
    border-bottom: 1px solid rgba(61, 74, 61, 0.34);
    color: var(--on-surface, #d6e3ff);
    font-size: 12px;
    font-weight: 750;
}

.assistant-chat-list {
    display: flex;
    flex: 1 1 auto;
    min-height: 0;
    flex-direction: column;
    gap: 6px;
    overflow-y: auto;
    padding: 8px;
}

.assistant-chat-list-empty {
    margin: auto;
    color: var(--on-surface-variant, #bccbb9);
    font-size: 12px;
}

.assistant-chat-item {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 6px;
    border: 1px solid transparent;
    border-radius: 6px;
    background: transparent;
}

.assistant-chat-item:hover,
.assistant-chat-item.is-active {
    border-color: rgba(83, 224, 118, 0.28);
    background: rgba(255, 255, 255, 0.06);
}

.assistant-chat-main {
    display: flex;
    min-width: 0;
    flex-direction: column;
    gap: 2px;
    border: 0;
    background: transparent;
    color: inherit;
    cursor: pointer;
    font: inherit;
    padding: 8px;
    text-align: left;
}

.assistant-chat-main strong,
.assistant-chat-main span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.assistant-chat-main strong {
    color: var(--on-surface, #d6e3ff);
    font-size: 12px;
    font-weight: 750;
}

.assistant-chat-main span {
    color: var(--on-surface-variant, #bccbb9);
    font-size: 11px;
}

.assistant-chat-actions {
    display: inline-flex;
    gap: 1px;
    padding-right: 5px;
}

.assistant-list-action {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    border: 0;
    border-radius: 4px;
    background: transparent;
    color: var(--on-surface-variant, #bccbb9);
    cursor: pointer;
}

.assistant-list-action:hover {
    background: rgba(255, 255, 255, 0.08);
    color: var(--on-surface, #d6e3ff);
}

.assistant-list-action .material-symbols-outlined {
    font-size: 17px;
}

.assistant-empty {
    display: flex;
    flex: 1 1 auto;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    max-width: 260px;
    margin: auto;
    color: var(--on-surface-variant, #bccbb9);
    text-align: center;
    padding: 36px 12px;
}

.assistant-empty .material-symbols-outlined {
    margin-bottom: 14px;
    color: var(--on-surface-variant, #bccbb9);
    font-size: 42px;
}

.assistant-empty strong {
    color: var(--on-surface, #d6e3ff);
    font-size: 13px;
    font-weight: 800;
}

.assistant-empty span:last-child {
    margin-top: 8px;
    font-size: 12px;
    line-height: 1.5;
}

.assistant-message {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.assistant-message-user {
    align-items: flex-end;
}

.assistant-message-user .assistant-bubble {
    background: var(--primary-container, #1db954);
    color: var(--on-primary, #003914);
}

.assistant-message-model .assistant-bubble {
    background: transparent;
    color: var(--on-surface, #d6e3ff);
}

.assistant-bubble {
    max-width: 94%;
    padding: 9px 11px;
    border-radius: 8px;
    font-size: 13px;
    line-height: 1.5;
    white-space: pre-wrap;
    word-wrap: break-word;
}

.assistant-bubble a {
    color: var(--primary, #53e076);
    font-weight: 750;
    text-decoration: underline;
    text-underline-offset: 2px;
}

.assistant-tool-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 13px;
    color: var(--on-surface-variant, #b8c2cf);
}

.assistant-tool {
    display: flex;
    align-items: center;
    gap: 6px;
}

.assistant-tool .material-symbols-outlined {
    font-size: 16px;
}

.assistant-tool-name {
    font-family: ui-monospace, "SF Mono", Menlo, monospace;
    font-size: 12px;
}

.assistant-pending-card {
    border: 1px solid var(--outline-variant, #3d4a3d);
    border-radius: 8px;
    padding: 12px 14px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    background: var(--surface-container-low, #0d1c32);
}

.assistant-pending-heading {
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 600;
    font-size: 14px;
}

.assistant-pending-list {
    margin: 0;
    padding-left: 18px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 13px;
}

.assistant-pending-actions {
    display: flex;
    gap: 8px;
    justify-content: flex-end;
}

.assistant-pending-tag {
    align-self: flex-end;
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
}

.assistant-pending-tag.success {
    background: var(--secondary-container, #1c5329);
    color: var(--on-secondary-container, #8cc690);
}

.assistant-pending-tag.muted {
    background: var(--surface-container, #112036);
    color: var(--on-surface-variant, #b8c2cf);
}

.assistant-status {
    font-size: 13px;
    color: var(--on-surface-variant, #bccbb9);
    padding: 0 12px;
}

.assistant-status.is-error {
    color: var(--error, #ffb4ab);
}

.assistant-input {
    display: flex;
    flex: 0 0 auto;
    flex-direction: column;
    padding: 8px 10px 10px;
    border-top: 1px solid rgba(61, 74, 61, 0.42);
    background: var(--surface, #112036);
}

.assistant-composer {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border: 1px solid var(--outline-variant, #3d4a3d);
    border-radius: 8px;
    background: var(--surface-container-high, #1c2a41);
}

.assistant-composer .form-textarea {
    min-height: 74px;
    max-height: 180px;
    border: 0;
    border-radius: 0;
    background: transparent;
    color: var(--on-surface, #d6e3ff);
    padding: 11px 12px 6px;
    resize: none;
}

.assistant-composer .form-textarea:focus {
    outline: none;
    box-shadow: none;
}

.assistant-composer-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    min-height: 36px;
    padding: 4px 6px 6px;
}

.assistant-composer-tools {
    display: flex;
    align-items: center;
    min-width: 0;
    gap: 6px;
}

.assistant-icon-tool,
.assistant-send {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border: 0;
    border-radius: 5px;
    background: transparent;
    color: var(--on-surface-variant, #bccbb9);
    cursor: pointer;
}

.assistant-icon-tool:hover,
.assistant-send:hover {
    background: rgba(255, 255, 255, 0.08);
    color: var(--on-surface, #d6e3ff);
}

.assistant-icon-tool .material-symbols-outlined,
.assistant-send .material-symbols-outlined {
    font-size: 19px;
}

.assistant-send:disabled {
    cursor: default;
    opacity: 0.45;
}

.assistant-model-picker select {
    min-height: 28px;
    border: 0;
    border-radius: 5px;
    background: var(--surface-container-highest, #27354c);
    color: var(--on-surface, #d6e3ff);
    font: inherit;
    font-size: 11px;
    padding: 0 6px;
}

.scan-status {
    color: var(--on-surface-variant, #bccbb9);
    font-size: 11px;
}

.btn-secondary {
    background: transparent;
    border: 1px solid var(--outline-variant, #344155);
    color: inherit;
    padding: 9px 18px;
    border-radius: 999px;
    font: inherit;
    cursor: pointer;
}

.btn-secondary:disabled {
    opacity: 0.5;
    cursor: default;
}

@media (max-width: 720px) {
    .assistant-float {
        right: 16px;
        bottom: calc(74px + env(safe-area-inset-bottom));
    }

    .assistant-popover {
        width: calc(100vw - 32px);
        height: min(680px, calc(100vh - 132px));
        max-height: calc(100vh - 132px);
    }

    .assistant-fab-label {
        display: none;
    }

    .assistant-fab {
        width: 56px;
        padding: 0;
    }

    .assistant-float.is-open {
        top: 64px;
        right: 12px;
        bottom: calc(72px + env(safe-area-inset-bottom));
        left: 12px;
        align-items: stretch;
        gap: 0;
    }

    .assistant-float.is-open .assistant-fab {
        display: none;
    }

    .assistant-float.is-open .assistant-popover {
        width: 100%;
        height: 100%;
        max-height: none;
    }

    .assistant-transcript {
        min-height: 0;
    }

    .assistant-float.is-open .assistant-transcript {
        max-height: none;
    }

    .assistant-input .form-textarea {
        min-height: 82px;
        max-height: 24vh;
        resize: none;
    }
}

@supports (height: 100dvh) {
    .assistant-popover {
        height: min(700px, calc(100dvh - 112px));
        max-height: min(700px, calc(100dvh - 112px));
    }

    @media (max-width: 720px) {
        .assistant-popover {
            height: min(680px, calc(100dvh - 132px));
            max-height: calc(100dvh - 132px);
        }

        .assistant-input .form-textarea {
            max-height: 24dvh;
        }
    }
}

.books-page {
    display: flex;
    flex-direction: column;
    gap: clamp(32px, 5vw, 64px);
    padding-bottom: 48px;
}

.book-reader-page {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* Reclaim the canvas's bottom padding so the book can use the full height. */
.app-canvas:has(.book-reader-page) {
    padding-bottom: 20px;
}

.reader-toolbar {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 16px;
}

.books-library-hero {
    position: relative;
    isolation: isolate;
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(330px, 0.75fr);
    align-items: center;
    gap: clamp(32px, 6vw, 88px);
    min-height: 430px;
    overflow: hidden;
    padding: clamp(32px, 5vw, 72px);
    border: 1px solid rgba(83, 224, 118, 0.14);
    border-radius: 28px;
    background:
        radial-gradient(circle at 12% 12%, rgba(83, 224, 118, 0.16), transparent 34%),
        linear-gradient(135deg, #0b2031 0%, #07172b 55%, #10243a 100%);
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.28);
}

.books-library-hero::after {
    content: "";
    position: absolute;
    z-index: -1;
    right: 23%;
    bottom: -170px;
    width: 360px;
    height: 360px;
    border-radius: 50%;
    background: rgba(83, 224, 118, 0.07);
    filter: blur(2px);
}

.books-hero-copy {
    position: relative;
    z-index: 1;
    max-width: 650px;
}

.books-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 20px;
    color: var(--primary);
    font-size: 11px;
    font-weight: 850;
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

.books-eyebrow .material-symbols-outlined {
    font-size: 18px;
}

.books-hero-title {
    max-width: 680px;
    margin: 0;
    color: #f2f6ff;
    font-size: clamp(2.65rem, 5.2vw, 5rem);
    font-weight: 850;
    letter-spacing: -0.065em;
    line-height: 0.98;
}

.books-hero-title span {
    color: var(--primary);
}

.books-hero-description {
    max-width: 590px;
    margin: 24px 0 0;
    color: rgba(214, 227, 255, 0.72);
    font-size: clamp(0.98rem, 1.4vw, 1.1rem);
    line-height: 1.75;
}

.books-library-stats {
    display: flex;
    align-items: center;
    gap: 22px;
    margin-top: 34px;
}

.books-library-stat {
    display: flex;
    align-items: baseline;
    gap: 8px;
}

.books-library-stat strong {
    color: #f2f6ff;
    font-size: 1.45rem;
    font-variant-numeric: tabular-nums;
}

.books-library-stat span {
    color: rgba(214, 227, 255, 0.58);
    font-size: 0.8rem;
    font-weight: 750;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.books-stat-divider {
    width: 1px;
    height: 28px;
    background: rgba(214, 227, 255, 0.16);
}

.books-upload-card {
    position: relative;
    z-index: 2;
    padding: 26px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 20px;
    background: rgba(17, 32, 54, 0.78);
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.34);
    backdrop-filter: blur(18px);
}

.books-upload-heading {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 22px;
}

.books-upload-icon {
    width: 48px;
    height: 48px;
    display: grid;
    flex: 0 0 auto;
    place-items: center;
    border-radius: 14px;
    background: rgba(83, 224, 118, 0.13);
    color: var(--primary);
}

.books-upload-heading p {
    margin: 0 0 3px;
    color: rgba(214, 227, 255, 0.56);
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.books-upload-heading h2 {
    margin: 0;
    color: #f2f6ff;
    font-size: 1.2rem;
    font-weight: 800;
}

.books-file-picker {
    position: relative;
    display: flex;
    align-items: center;
    gap: 13px;
    min-width: 0;
    padding: 15px;
    border: 1px dashed rgba(83, 224, 118, 0.38);
    border-radius: 14px;
    background: rgba(83, 224, 118, 0.045);
    cursor: pointer;
    transition: border-color var(--dur-fast), background var(--dur-fast);
}

.books-file-picker:hover,
.books-file-picker:focus-within {
    border-color: rgba(83, 224, 118, 0.78);
    background: rgba(83, 224, 118, 0.08);
}

.books-file-picker > .material-symbols-outlined {
    flex: 0 0 auto;
    color: #ff9898;
    font-size: 28px;
}

.books-file-picker-copy {
    display: grid;
    flex: 1 1 auto;
    min-width: 0;
    gap: 3px;
}

.books-file-picker-copy strong {
    overflow: hidden;
    color: #f2f6ff;
    font-size: 0.85rem;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.books-file-picker-copy small {
    color: rgba(214, 227, 255, 0.52);
    font-size: 0.7rem;
}

.books-file-browse {
    flex: 0 0 auto;
    color: var(--primary);
    font-size: 0.74rem;
    font-weight: 800;
}

.books-file-picker input {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    opacity: 0;
}

.books-upload-button {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-top: 13px;
    padding: 14px 18px;
    border: 0;
    border-radius: 12px;
    background: var(--primary);
    color: var(--on-primary);
    font: inherit;
    font-size: 0.86rem;
    font-weight: 850;
    cursor: pointer;
    box-shadow: 0 12px 28px rgba(83, 224, 118, 0.18);
    transition: transform var(--dur-fast), box-shadow var(--dur-fast), background var(--dur-fast);
}

.books-upload-button:hover {
    background: var(--primary-fixed);
    box-shadow: 0 16px 32px rgba(83, 224, 118, 0.26);
    transform: translateY(-1px);
}

.books-upload-button .material-symbols-outlined {
    font-size: 19px;
}

.books-hero-orbit {
    position: absolute;
    z-index: -1;
    display: block;
    border: 1px solid rgba(83, 224, 118, 0.11);
    border-radius: 50%;
    pointer-events: none;
}

.books-hero-orbit-one {
    top: -190px;
    right: -120px;
    width: 520px;
    height: 520px;
}

.books-hero-orbit-two {
    right: 90px;
    bottom: -330px;
    width: 600px;
    height: 600px;
}

.books-notice {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: -38px;
    padding: 13px 16px;
    border: 1px solid rgba(83, 224, 118, 0.24);
    border-radius: 12px;
    background: rgba(83, 224, 118, 0.08);
    color: var(--on-surface);
    font-size: 0.86rem;
    font-weight: 650;
}

.books-notice .material-symbols-outlined {
    color: var(--primary);
    font-size: 20px;
}

.books-collection {
    display: grid;
    gap: 24px;
}

.books-collection-header {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 20px;
}

.books-section-label {
    margin: 0 0 7px;
    color: var(--primary);
    font-size: 0.68rem;
    font-weight: 850;
    letter-spacing: 0.17em;
    text-transform: uppercase;
}

.books-collection-header h2 {
    margin: 0;
    color: var(--on-surface);
    font-size: clamp(1.55rem, 3vw, 2.15rem);
    font-weight: 850;
    letter-spacing: -0.035em;
}

.books-count-pill {
    padding: 8px 13px;
    border: 1px solid rgba(188, 203, 185, 0.14);
    border-radius: var(--radius-full);
    background: var(--surface-low);
    color: var(--on-surface-var);
    font-size: 0.72rem;
    font-weight: 750;
}

.book-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(330px, 1fr));
    gap: 20px;
}

.book-card {
    min-width: 0;
}

.book-card-link {
    display: grid;
    grid-template-columns: 112px minmax(0, 1fr);
    gap: 20px;
    min-height: 190px;
    height: 100%;
    padding: 18px;
    overflow: hidden;
    border: 1px solid rgba(188, 203, 185, 0.12);
    border-radius: 18px;
    background:
        linear-gradient(145deg, rgba(255, 255, 255, 0.025), transparent 48%),
        var(--surface);
    color: inherit;
    text-decoration: none;
    box-shadow: 0 18px 45px rgba(0, 0, 0, 0.14);
    transition: border-color var(--dur-base), box-shadow var(--dur-base), transform var(--dur-base), background var(--dur-base);
}

.book-card-link:hover {
    border-color: rgba(83, 224, 118, 0.36);
    background:
        linear-gradient(145deg, rgba(83, 224, 118, 0.055), transparent 48%),
        var(--surface-container-high);
    box-shadow: 0 24px 55px rgba(0, 0, 0, 0.25);
    transform: translateY(-4px);
}

.book-card-link:focus-visible {
    outline: 3px solid rgba(83, 224, 118, 0.52);
    outline-offset: 3px;
}

.book-cover {
    position: relative;
    display: flex;
    flex-direction: column;
    min-width: 0;
    overflow: hidden;
    padding: 13px 12px;
    border-radius: 5px 12px 12px 5px;
    color: white;
    box-shadow: -5px 8px 22px rgba(0, 0, 0, 0.28), inset 4px 0 rgba(255, 255, 255, 0.1);
    transition: transform var(--dur-base);
}

.book-card-link:hover .book-cover {
    transform: rotate(-1.5deg) translateY(-2px);
}

.book-cover::after {
    content: "";
    position: absolute;
    z-index: 2;
    inset: 0;
    background: linear-gradient(115deg, rgba(255, 255, 255, 0.1), transparent 30%, rgba(0, 0, 0, 0.09));
    pointer-events: none;
}

.book-cover-1 { background: linear-gradient(155deg, #1d8462, #0b3c3d); }
.book-cover-2 { background: linear-gradient(155deg, #6553b9, #262a68); }
.book-cover-3 { background: linear-gradient(155deg, #bc5b4a, #663236); }
.book-cover-4 { background: linear-gradient(155deg, #2f779d, #173752); }

.book-cover-preview {
    position: absolute;
    z-index: 1;
    inset: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    object-fit: cover;
    object-position: top center;
    background: #ffffff;
    transition: opacity var(--dur-slow);
}

.book-cover-preview.is-rendered {
    opacity: 1;
}

.book-cover-mark {
    align-self: flex-end;
    display: grid;
    width: 25px;
    height: 25px;
    place-items: center;
    border: 1px solid rgba(255, 255, 255, 0.44);
    border-radius: 50%;
    font-size: 0.65rem;
    font-weight: 900;
}

.book-cover-title {
    display: -webkit-box;
    margin-top: auto;
    overflow: hidden;
    font-family: var(--font-serif);
    font-size: 0.8rem;
    font-weight: 700;
    line-height: 1.25;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 3;
}

.book-cover-rule {
    width: 24px;
    height: 2px;
    margin: 10px 0 7px;
    background: rgba(255, 255, 255, 0.72);
}

.book-cover-type {
    font-size: 0.48rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.book-card-content {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.book-card-topline,
.book-card-footer,
.book-format,
.book-page-count,
.book-read-action {
    display: flex;
    align-items: center;
}

.book-card-topline {
    justify-content: space-between;
    gap: 10px;
}

.book-format {
    gap: 4px;
    color: #ff9c9c;
    font-size: 0.65rem;
    font-weight: 850;
    letter-spacing: 0.1em;
}

.book-format .material-symbols-outlined {
    font-size: 15px;
}

.book-added {
    overflow: hidden;
    color: rgba(188, 203, 185, 0.58);
    font-size: 0.66rem;
    font-weight: 650;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.book-title {
    display: -webkit-box;
    margin: 21px 0 12px;
    overflow: hidden;
    color: var(--on-surface);
    font-size: 1.08rem;
    font-weight: 820;
    letter-spacing: -0.018em;
    line-height: 1.35;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
}

.book-card-footer {
    justify-content: space-between;
    gap: 12px;
    margin-top: auto;
}

.book-page-count {
    gap: 6px;
    color: var(--on-surface-var);
    font-size: 0.72rem;
    font-weight: 700;
}

.book-page-count .material-symbols-outlined {
    color: rgba(188, 203, 185, 0.7);
    font-size: 17px;
}

.book-read-action {
    gap: 5px;
    color: var(--primary);
    font-size: 0.72rem;
    font-weight: 850;
}

.book-read-action .material-symbols-outlined {
    font-size: 16px;
    transition: transform var(--dur-fast);
}

.book-card-link:hover .book-read-action .material-symbols-outlined {
    transform: translateX(3px);
}

.books-empty-state {
    grid-column: 1 / -1;
    display: grid;
    justify-items: center;
    min-height: 320px;
    place-content: center;
    padding: 46px 24px;
    border: 1px dashed rgba(83, 224, 118, 0.27);
    border-radius: 20px;
    background:
        radial-gradient(circle at 50% 0%, rgba(83, 224, 118, 0.09), transparent 44%),
        var(--surface-low);
    text-align: center;
}

.books-empty-icon {
    display: grid;
    width: 64px;
    height: 64px;
    margin-bottom: 18px;
    place-items: center;
    border-radius: 18px;
    background: rgba(83, 224, 118, 0.1);
    color: var(--primary);
    transform: rotate(-4deg);
}

.books-empty-icon .material-symbols-outlined {
    font-size: 31px;
}

.books-empty-state h3 {
    margin: 0;
    color: var(--on-surface);
    font-size: 1.25rem;
    font-weight: 850;
}

.books-empty-state p {
    max-width: 470px;
    margin: 10px 0 22px;
    color: var(--on-surface-var);
    font-size: 0.88rem;
    line-height: 1.65;
}

.books-empty-action {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    color: var(--primary);
    font-size: 0.8rem;
    font-weight: 850;
    cursor: pointer;
}

.books-empty-action .material-symbols-outlined {
    font-size: 17px;
}

.pdf-reader-shell {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.reader-antiforgery {
    display: none;
}

.reader-workspace {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
    min-width: 0;
}

.reader-workspace.is-split {
    grid-template-columns: minmax(0, 1fr) minmax(320px, 1fr);
}

.pdf-canvas-wrap {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: calc(100vh - 120px);
    min-height: 420px;
    overflow: auto;
    padding: 24px;
    border: 1px solid var(--outline-variant);
    border-radius: 16px;
    background: radial-gradient(circle at top, var(--surface) 0%, var(--background) 100%);
    text-align: center;
    scroll-behavior: smooth;
}

.pdf-page-surface {
    position: relative;
    flex: 0 0 auto;
    margin: auto;
    overflow: hidden;
    border-radius: 4px;
    background: white;
    box-shadow: 0 22px 48px rgba(15, 23, 42, 0.20);
}

.pdf-page-surface canvas {
    display: block;
    background: white;
}

.reader-highlight-layer {
    position: absolute;
    inset: 0;
    z-index: 1;
    overflow: hidden;
    pointer-events: none;
}

.reader-highlight-fragment {
    position: absolute;
    border-radius: 2px;
}

.reader-highlight-fragment.is-selection {
    background: color-mix(in srgb, var(--primary) 24%, transparent);
}

.reader-highlight-fragment.is-linked {
    background: color-mix(in srgb, var(--primary) 16%, transparent);
}

.reader-highlight-fragment.is-hover {
    background: color-mix(in srgb, var(--primary) 12%, transparent);
}

.reader-highlight-fragment.is-speech {
    border: 1px solid color-mix(in srgb, var(--primary) 62%, transparent);
    background: color-mix(in srgb, var(--primary) 28%, transparent);
    box-shadow: 0 0 0 2px color-mix(in srgb, var(--primary) 10%, transparent);
}

.textLayer {
    position: absolute;
    inset: 0;
    z-index: 2;
    overflow: clip;
    line-height: 1;
    text-align: initial;
    text-size-adjust: none;
    forced-color-adjust: none;
    transform-origin: 0 0;
    caret-color: CanvasText;
}

.textLayer :is(span, br) {
    position: absolute;
    margin: 0;
    padding: 0;
    color: transparent;
    white-space: pre;
    cursor: text;
    transform-origin: 0 0;
}

.textLayer > :not(.markedContent),
.textLayer .markedContent span:not(.markedContent) {
    z-index: 1;
}

.textLayer span.markedContent {
    top: 0;
    height: 0;
}

.textLayer span[role="img"] {
    user-select: none;
    cursor: default;
}

.textLayer ::selection {
    background: transparent;
    color: transparent;
}

.textLayer span.is-linked-source {
    background: transparent;
}

.textLayer br::selection {
    background: transparent;
}

.textLayer .endOfContent {
    display: block;
    position: absolute;
    inset: 100% 0 0;
    z-index: 0;
    cursor: default;
    user-select: none;
}

.textLayer.selecting .endOfContent {
    top: 0;
}

.reader-translation-pane {
    min-width: 0;
    height: calc(100vh - 120px);
    min-height: 420px;
    overflow: auto;
    border: 1px solid var(--outline-variant);
    border-radius: 16px;
    background: var(--surface);
    box-shadow: 0 18px 42px rgba(1, 14, 36, 0.22);
}

.reader-translation-heading {
    position: sticky;
    top: 0;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 18px 22px;
    border-bottom: 1px solid var(--outline-variant);
    background: color-mix(in srgb, var(--surface) 92%, transparent);
    backdrop-filter: blur(12px);
}

.reader-translation-heading div {
    display: grid;
    gap: 2px;
}

.reader-translation-heading span,
.reader-translation-heading small {
    color: var(--on-surface-var);
    font-size: 11px;
    font-weight: 750;
}

.reader-translation-heading strong {
    color: var(--on-surface);
    font-size: 16px;
}

.reader-translation-state {
    margin: 22px;
    padding: 18px;
    border-radius: 10px;
    background: var(--surface-low);
    color: var(--on-surface-var);
    font-size: 14px;
    line-height: 1.5;
}

.reader-translation-state.is-error {
    color: var(--error);
}

.reader-translation-content {
    padding: clamp(24px, 4vw, 48px);
    color: var(--on-surface);
    font-family: Georgia, "Times New Roman", serif;
    font-size: clamp(17px, 1.35vw, 21px);
    line-height: 1.75;
    text-align: left;
}

.reader-translation-paragraph {
    margin: 0 0 1.15em;
}

.reader-translation-segment {
    border-radius: 4px;
    cursor: text;
    transition: background 0.16s ease, color 0.16s ease;
}

.reader-translation-segment:hover,
.reader-translation-segment.is-linked,
.reader-translation-segment.is-speaking {
    background: color-mix(in srgb, var(--primary) 20%, transparent);
}

.reader-translation-segment.is-speaking {
    box-shadow: 0 0 0 2px color-mix(in srgb, var(--primary) 16%, transparent);
}

.reader-nav-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 6;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 58px;
    height: 58px;
    border-radius: 9999px;
    border: 1px solid var(--outline-variant);
    background: color-mix(in srgb, var(--surface) 88%, transparent);
    color: var(--on-surface);
    cursor: pointer;
    box-shadow: 0 14px 34px rgba(15, 23, 42, 0.24);
    backdrop-filter: blur(8px);
    transition: transform 0.16s ease, background 0.16s ease, color 0.16s ease, opacity 0.16s ease;
}

.reader-nav-prev {
    left: 22px;
}

.reader-nav-next {
    right: 22px;
}

.reader-nav-arrow:hover:not(:disabled) {
    background: var(--primary);
    color: var(--on-primary, #ffffff);
    transform: translateY(-50%) scale(1.08);
}

.reader-nav-arrow:focus-visible {
    outline: 3px solid color-mix(in srgb, var(--primary) 45%, transparent);
    outline-offset: 3px;
}

.reader-nav-arrow:disabled {
    opacity: 0.3;
    pointer-events: none;
    box-shadow: none;
}

.reader-nav-arrow .material-symbols-outlined {
    font-size: 32px;
}

.reader-page-pill {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 6;
    padding: 8px 20px;
    border-radius: 9999px;
    background: rgba(15, 23, 42, 0.80);
    color: #ffffff;
    font-weight: 700;
    font-size: 0.9rem;
    letter-spacing: 0.01em;
    box-shadow: 0 12px 30px rgba(15, 23, 42, 0.32);
    backdrop-filter: blur(4px);
    pointer-events: none;
}

.reader-tts-live {
    position: absolute;
    bottom: 66px;
    left: 50%;
    z-index: 7;
    max-width: min(420px, calc(100vw - 32px));
    transform: translateX(-50%);
    overflow: hidden;
    padding: 7px 14px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 9999px;
    background: rgba(15, 23, 42, 0.86);
    color: rgba(255, 255, 255, 0.92);
    font-size: 12px;
    font-weight: 750;
    text-overflow: ellipsis;
    white-space: nowrap;
    box-shadow: 0 10px 26px rgba(15, 23, 42, 0.3);
    backdrop-filter: blur(8px);
    pointer-events: none;
}

.reader-tts-live.is-error {
    border-color: color-mix(in srgb, var(--error) 55%, transparent);
    color: var(--error);
}

.reader-back {
    position: absolute;
    top: 16px;
    left: 16px;
    z-index: 7;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    height: 40px;
    padding: 0 16px 0 12px;
    border-radius: 9999px;
    background: rgba(15, 23, 42, 0.82);
    color: rgba(255, 255, 255, 0.92);
    font-weight: 700;
    font-size: 0.85rem;
    text-decoration: none;
    box-shadow: 0 12px 30px rgba(15, 23, 42, 0.34);
    backdrop-filter: blur(8px);
    transition: background 0.15s ease, color 0.15s ease, transform 0.15s ease;
}

.reader-back:hover {
    background: var(--primary);
    color: var(--on-primary, #ffffff);
    transform: translateY(-1px);
}

.reader-back:focus-visible {
    outline: 3px solid color-mix(in srgb, var(--primary) 45%, transparent);
    outline-offset: 3px;
}

.reader-back .material-symbols-outlined {
    font-size: 20px;
}

.reader-tools {
    position: absolute;
    top: 16px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 7;
    display: inline-flex;
    align-items: center;
    gap: 2px;
    padding: 6px;
    border-radius: 9999px;
    background: rgba(15, 23, 42, 0.82);
    box-shadow: 0 12px 30px rgba(15, 23, 42, 0.34);
    backdrop-filter: blur(8px);
}

.reader-translation-tools {
    position: absolute;
    top: 16px;
    right: 16px;
    z-index: 8;
    display: inline-flex;
    align-items: center;
    gap: 2px;
    padding: 6px;
    border-radius: 9999px;
    background: rgba(15, 23, 42, 0.82);
    box-shadow: 0 12px 30px rgba(15, 23, 42, 0.34);
    backdrop-filter: blur(8px);
}

.reader-translation-toggle {
    gap: 6px;
    border: 1px solid rgba(255, 255, 255, 0.16);
    padding-left: 9px;
    padding-right: 7px;
}

.reader-translation-status {
    min-width: 32px;
    padding: 3px 8px;
    border-radius: 9999px;
    background: rgba(255, 255, 255, 0.12);
    color: rgba(255, 255, 255, 0.76);
    font-size: 10px;
    font-weight: 850;
    line-height: 1.2;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.reader-translation-toggle.is-active .reader-translation-status {
    background: rgba(255, 255, 255, 0.2);
    color: currentColor;
}

.reader-tool.reader-translation-toggle[data-translation-state="translating"] {
    background: color-mix(in srgb, var(--primary) 72%, #0f172a);
}

.reader-translation-toggle[data-translation-state="translating"] [data-translation-toggle-icon] {
    animation: reader-translation-spin 0.9s linear infinite;
}

.reader-tool.reader-translation-toggle[data-translation-state="error"],
.reader-tool.reader-translation-toggle[data-translation-state="unavailable"] {
    background: color-mix(in srgb, var(--error) 48%, #0f172a);
}

@keyframes reader-translation-spin {
    to {
        transform: rotate(360deg);
    }
}

.reader-language-picker select {
    width: 116px;
    height: 40px;
    padding: 0 28px 0 10px;
    border: 0;
    border-radius: 9999px;
    outline: none;
    background: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.96);
    font: inherit;
    font-size: 12px;
    font-weight: 750;
    cursor: pointer;
}

.reader-language-picker select:focus-visible {
    outline: 2px solid rgba(255, 255, 255, 0.75);
    outline-offset: 2px;
}

.reader-mobile-tabs {
    position: absolute;
    top: 62px;
    left: 50%;
    z-index: 9;
    display: none;
    transform: translateX(-50%);
    padding: 4px;
    border-radius: 9999px;
    background: rgba(15, 23, 42, 0.88);
    box-shadow: 0 10px 26px rgba(15, 23, 42, 0.3);
}

.reader-mobile-tabs button {
    min-height: 34px;
    padding: 0 14px;
    border: 0;
    border-radius: 9999px;
    background: transparent;
    color: rgba(255, 255, 255, 0.78);
    font: inherit;
    font-size: 12px;
    font-weight: 800;
    cursor: pointer;
}

.reader-mobile-tabs button.is-active {
    background: var(--primary);
    color: var(--on-primary);
}

.reader-selection-popover {
    position: fixed;
    z-index: 1400;
    width: min(340px, calc(100vw - 24px));
    padding: 12px 14px;
    border: 1px solid var(--outline-variant);
    border-radius: 12px;
    background: var(--surface);
    color: var(--on-surface);
    box-shadow: 0 20px 54px rgba(0, 0, 0, 0.46);
    pointer-events: none;
}

.reader-selection-popover [data-hover-translation] {
    display: block;
    font-size: 16px;
    line-height: 1.5;
}

.reader-tool {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 10px;
    border: none;
    border-radius: 9999px;
    background: transparent;
    color: rgba(255, 255, 255, 0.92);
    font: inherit;
    font-weight: 700;
    font-size: 0.85rem;
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease, opacity 0.15s ease;
}

.reader-tool:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.16);
}

.reader-tool:focus-visible {
    outline: 2px solid rgba(255, 255, 255, 0.75);
    outline-offset: 2px;
}

.reader-tool:disabled {
    opacity: 0.35;
    cursor: default;
}

.reader-tool.is-active {
    background: var(--primary);
    color: var(--on-primary, #ffffff);
}

.reader-tts-toggle {
    gap: 6px;
}

.reader-tts-toggle.is-reading {
    background: var(--primary);
    color: var(--on-primary, #ffffff);
}

.reader-voice-picker {
    display: inline-flex;
    align-items: center;
}

.reader-voice-picker select {
    width: 104px;
    height: 36px;
    padding: 0 28px 0 10px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 9999px;
    background: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.94);
    font: inherit;
    font-size: 12px;
    font-weight: 750;
    cursor: pointer;
}

.reader-voice-picker select:focus-visible {
    outline: 2px solid rgba(255, 255, 255, 0.75);
    outline-offset: 2px;
}

.reader-tool .material-symbols-outlined {
    font-size: 22px;
}

.reader-zoom-value {
    min-width: 58px;
    font-variant-numeric: tabular-nums;
}

.reader-tool-divider {
    width: 1px;
    height: 22px;
    margin: 0 4px;
    background: rgba(255, 255, 255, 0.24);
}

@media (max-width: 760px) {
    .reader-toolbar,
    .book-card {
        align-items: stretch;
        flex-direction: column;
    }

    .pdf-canvas-wrap {
        height: calc(100vh - 170px);
        padding: 12px;
    }

    .reader-workspace.is-split {
        grid-template-columns: minmax(0, 1fr);
    }

    .pdf-reader-shell:has(.reader-workspace.is-split) .reader-mobile-tabs {
        display: inline-flex;
    }

    .reader-workspace.is-split.mobile-show-original .reader-translation-pane,
    .reader-workspace.is-split.mobile-show-translation .pdf-canvas-wrap {
        display: none;
    }

    .reader-translation-pane {
        height: calc(100vh - 170px);
        min-height: 420px;
    }

    .reader-nav-arrow {
        width: 48px;
        height: 48px;
    }

    .reader-nav-prev {
        left: 10px;
    }

    .reader-nav-next {
        right: 10px;
    }

    .reader-nav-arrow .material-symbols-outlined {
        font-size: 26px;
    }

    .reader-tools {
        top: 10px;
        right: 10px;
        left: auto;
        transform: none;
        gap: 0;
        padding: 4px;
    }

    .reader-back {
        top: 10px;
        left: 10px;
        justify-content: center;
        width: 36px;
        height: 36px;
        padding: 0;
    }

    .reader-back-label {
        display: none;
    }

    .reader-translation-tools {
        top: 58px;
        right: 10px;
        gap: 0;
        padding: 4px;
    }

    .reader-translation-label,
    .reader-split-label,
    .reader-tts-label {
        display: none;
    }

    .reader-language-picker select {
        width: 102px;
        height: 36px;
    }

    .reader-voice-picker select {
        width: 88px;
        height: 34px;
        padding-left: 8px;
        font-size: 11px;
    }

    .reader-mobile-tabs {
        top: 104px;
    }

    .reader-tool {
        min-width: 36px;
        height: 36px;
        padding: 0 6px;
    }

    .reader-zoom-value {
        min-width: 50px;
    }
}

@media (min-width: 761px) and (max-width: 1250px) {
    .reader-translation-tools {
        top: 68px;
    }

    .reader-translation-label,
    .reader-split-label {
        display: none;
    }
}

@media (max-width: 980px) {
    .books-library-hero {
        grid-template-columns: 1fr;
    }

    .books-upload-card {
        max-width: 560px;
    }
}

@media (max-width: 620px) {
    .books-page {
        gap: 36px;
        padding-bottom: 24px;
    }

    .books-library-hero {
        margin-inline: -8px;
        padding: 30px 20px 22px;
        border-radius: 22px;
    }

    .books-hero-title {
        font-size: clamp(2.45rem, 13vw, 3.35rem);
    }

    .books-hero-description {
        line-height: 1.6;
    }

    .books-library-stats {
        margin-top: 26px;
    }

    .books-upload-card {
        padding: 18px;
    }

    .books-file-browse {
        display: none;
    }

    .books-collection-header {
        align-items: start;
        flex-direction: column;
        gap: 12px;
    }

    .book-grid {
        grid-template-columns: 1fr;
    }

    .book-card-link {
        grid-template-columns: 92px minmax(0, 1fr);
        gap: 15px;
        min-height: 168px;
        padding: 14px;
    }

    .book-title {
        margin-top: 15px;
    }

    .book-added {
        display: none;
    }

    .book-read-action {
        width: 32px;
        height: 32px;
        justify-content: center;
        border-radius: 50%;
        background: rgba(83, 224, 118, 0.1);
        font-size: 0;
    }

    .books-notice {
        margin-top: -18px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .book-card-link,
    .book-cover,
    .book-read-action .material-symbols-outlined,
    .books-upload-button {
        transition: none;
    }
}

/* =============================================================
   Mobile polish
   ============================================================= */
/* Keep form fields at 16px on touch devices so iOS Safari does
   not auto-zoom the page when a field receives focus. */
@media (max-width: 900px), (pointer: coarse) {
    .field-input,
    .form-input,
    .form-textarea,
    .assistant-composer .form-textarea,
    .assistant-context-picker select,
    .assistant-model-picker select,
    .app-search input {
        font-size: 16px;
    }
}

/* Size against the visible viewport on mobile browsers whose
   URL bar collapses (100vh overshoots there). */
@supports (min-height: 100dvh) {
    .auth-body,
    .app-shell {
        min-height: 100dvh;
    }

    .app-sidebar {
        height: 100dvh;
    }
}

/* =============================================================
   Flashcard swipe gestures
   ============================================================= */
.flashcard {
    position: relative;
    touch-action: pan-y;
}

.flashcard.is-dragging {
    animation: none;
    transition: none;
}

.flashcard.is-swipe-out-left,
.flashcard.is-swipe-out-right {
    animation: none;
    pointer-events: none;
    transition: transform 0.22s ease-in, opacity 0.22s ease-in;
    opacity: 0;
}

.flashcard.is-swipe-out-left {
    transform: translateX(-110%) rotate(-7deg);
}

.flashcard.is-swipe-out-right {
    transform: translateX(110%) rotate(7deg);
}

.flashcard.is-revealed::before,
.flashcard.is-revealed::after {
    position: absolute;
    top: 16px;
    z-index: 1;
    border-radius: 9999px;
    padding: 6px 12px;
    font-size: 11px;
    font-weight: 850;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.15s ease;
}

.flashcard.is-revealed::before {
    content: "Again";
    left: 16px;
    border: 1px solid rgba(255, 180, 171, 0.45);
    background: rgba(255, 180, 171, 0.12);
    color: var(--error);
}

.flashcard.is-revealed::after {
    content: "Good";
    right: 16px;
    border: 1px solid rgba(83, 224, 118, 0.45);
    background: rgba(83, 224, 118, 0.12);
    color: var(--primary);
}

.flashcard.drag-left::before,
.flashcard.drag-right::after {
    opacity: 1;
}

.swipe-hint {
    display: none;
    margin: 0;
    color: var(--outline);
    font-size: 12px;
    font-weight: 700;
    text-align: center;
}

@media (pointer: coarse) {
    .swipe-hint {
        display: block;
    }
}

@media (prefers-reduced-motion: reduce) {
    .flashcard.is-swipe-out-left,
    .flashcard.is-swipe-out-right {
        transition: none;
    }
}

/* Classroom */
.classroom-page {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.classroom-tabs {
    align-self: flex-start;
}

.classroom-tabs .tab {
    text-decoration: none;
    display: inline-flex;
    align-items: center;
}

.classroom-join-code {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--surface);
    border-radius: 16px;
    padding: 12px 18px;
}

.classroom-code-value {
    font-size: 20px;
    letter-spacing: 0.12em;
    font-variant-numeric: tabular-nums;
}

.classroom-invite-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.classroom-invite-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}

.classroom-invite-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.classroom-board {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.classroom-board-meta {
    display: flex;
    align-items: center;
    gap: 10px;
}

.classroom-board-body {
    margin: 10px 0 0;
    white-space: pre-wrap;
}

.classroom-board-actions {
    display: flex;
    gap: 12px;
    margin-top: 12px;
}

.classroom-pin-icon {
    font-size: 18px;
    color: var(--primary);
}

.classroom-announcement-input {
    resize: vertical;
    min-height: 80px;
}

.classroom-content-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.classroom-member-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.classroom-danger-zone {
    margin-top: 24px;
    padding-top: 16px;
    border-top: 1px solid var(--outline-variant, rgba(128, 128, 128, 0.25));
}

.classroom-results-table-wrap {
    overflow-x: auto;
}

/* Classroom layout fixes: equal-width form panels, right-sized buttons */
.classroom-page .books-header {
    flex-wrap: wrap;
    align-items: center;
}

.classroom-page .tool-grid {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    max-width: 1000px;
}

.classroom-page .btn-submit {
    width: auto;
    padding: 12px 26px;
}

.classroom-page .form-input,
.classroom-page .form-textarea {
    max-width: 520px;
}

.classroom-composer,
.classroom-board {
    width: 100%;
    max-width: 760px;
}

.classroom-composer .classroom-announcement-input {
    max-width: none;
}

/* Classroom index */
.classroom-index-page {
    gap: clamp(34px, 5vw, 64px);
    padding-bottom: 48px;
}

.classroom-index-hero {
    position: relative;
    isolation: isolate;
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
    align-items: center;
    gap: clamp(30px, 6vw, 80px);
    min-height: 420px;
    overflow: hidden;
    padding: clamp(34px, 5vw, 70px);
    border: 1px solid rgba(117, 160, 255, 0.16);
    border-radius: 28px;
    background:
        radial-gradient(circle at 10% 0%, rgba(83, 224, 118, 0.14), transparent 34%),
        radial-gradient(circle at 86% 90%, rgba(96, 126, 255, 0.18), transparent 42%),
        linear-gradient(140deg, #092232 0%, #09172e 58%, #131b3a 100%);
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.28);
}

.classroom-hero-copy {
    position: relative;
    z-index: 2;
}

.classroom-hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 20px;
    color: var(--primary);
    font-size: 11px;
    font-weight: 850;
    letter-spacing: 0.17em;
    text-transform: uppercase;
}

.classroom-hero-eyebrow .material-symbols-outlined {
    font-size: 18px;
}

.classroom-hero-copy h1 {
    max-width: 650px;
    margin: 0;
    color: #f3f6ff;
    font-size: clamp(2.75rem, 5.2vw, 5rem);
    font-weight: 850;
    letter-spacing: -0.065em;
    line-height: 0.98;
}

.classroom-hero-copy h1 span {
    color: var(--primary);
}

.classroom-hero-copy > p {
    max-width: 590px;
    margin: 24px 0 0;
    color: rgba(214, 227, 255, 0.7);
    font-size: clamp(0.96rem, 1.3vw, 1.08rem);
    line-height: 1.75;
}

.classroom-hero-stats {
    display: flex;
    align-items: center;
    gap: 22px;
    margin-top: 34px;
}

.classroom-hero-stats > div {
    display: flex;
    align-items: baseline;
    gap: 8px;
}

.classroom-hero-stats strong {
    color: #f3f6ff;
    font-size: 1.45rem;
    font-variant-numeric: tabular-nums;
}

.classroom-hero-stats span {
    color: rgba(214, 227, 255, 0.54);
    font-size: 0.7rem;
    font-weight: 750;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.classroom-hero-stats > i {
    width: 1px;
    height: 28px;
    background: rgba(214, 227, 255, 0.15);
}

.classroom-hero-visual {
    position: relative;
    z-index: 1;
    min-height: 260px;
}

.classroom-orbit {
    position: absolute;
    border: 1px solid rgba(126, 156, 255, 0.16);
    border-radius: 50%;
}

.classroom-orbit-one {
    inset: -38px 6% -34px 4%;
}

.classroom-orbit-two {
    inset: 9% 17% 8% 15%;
    border-color: rgba(83, 224, 118, 0.13);
}

.classroom-visual-card {
    position: absolute;
    display: flex;
    align-items: center;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(22, 39, 64, 0.82);
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.34);
    backdrop-filter: blur(18px);
}

.classroom-visual-card-main {
    top: 50%;
    left: 50%;
    width: min(100%, 330px);
    gap: 13px;
    padding: 18px;
    border-radius: 18px;
    transform: translate(-50%, -50%) rotate(-2deg);
}

.classroom-visual-card-main > .material-symbols-outlined {
    display: grid;
    width: 46px;
    height: 46px;
    flex: 0 0 auto;
    place-items: center;
    border-radius: 14px;
    background: rgba(83, 224, 118, 0.12);
    color: var(--primary);
}

.classroom-visual-card-main > div {
    display: grid;
    min-width: 0;
    gap: 3px;
}

.classroom-visual-card-main strong {
    color: #f3f6ff;
    font-size: 0.86rem;
}

.classroom-visual-card-main small {
    color: rgba(214, 227, 255, 0.55);
    font-size: 0.67rem;
}

.classroom-visual-live {
    margin-left: auto;
    padding: 5px 8px;
    border-radius: var(--radius-full);
    background: rgba(83, 224, 118, 0.12);
    color: var(--primary);
    font-size: 0.58rem;
    font-weight: 850;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.classroom-visual-person {
    position: absolute;
    z-index: 2;
    display: grid;
    width: 46px;
    height: 46px;
    place-items: center;
    border: 4px solid #101d35;
    border-radius: 50%;
    color: #08172c;
    font-size: 0.67rem;
    font-weight: 900;
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.3);
}

.classroom-person-one {
    top: 8%;
    right: 13%;
    background: #ffbd92;
}

.classroom-person-two {
    right: 2%;
    bottom: 10%;
    background: #9eb7ff;
}

.classroom-person-three {
    bottom: 3%;
    left: 4%;
    background: #8ce6aa;
}

.classroom-visual-note {
    position: absolute;
    z-index: 3;
    top: 4%;
    left: 0;
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 9px 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    background: rgba(17, 32, 54, 0.88);
    color: rgba(243, 246, 255, 0.82);
    font-size: 0.65rem;
    font-weight: 750;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.28);
    transform: rotate(3deg);
}

.classroom-visual-note .material-symbols-outlined {
    color: var(--primary);
    font-size: 17px;
}

.classroom-index-notice {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: -38px;
    padding: 13px 16px;
    border: 1px solid rgba(83, 224, 118, 0.24);
    border-radius: 12px;
    background: rgba(83, 224, 118, 0.08);
    color: var(--on-surface);
    font-size: 0.86rem;
    font-weight: 650;
}

.classroom-index-notice .material-symbols-outlined {
    color: var(--primary);
    font-size: 20px;
}

.classroom-invitations,
.classroom-actions-section,
.classroom-collection {
    display: grid;
    gap: 22px;
}

.classroom-section-heading {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 20px;
}

.classroom-section-heading p {
    margin: 0 0 7px;
    color: var(--primary);
    font-size: 0.68rem;
    font-weight: 850;
    letter-spacing: 0.17em;
    text-transform: uppercase;
}

.classroom-section-heading h2 {
    margin: 0;
    color: var(--on-surface);
    font-size: clamp(1.5rem, 3vw, 2.1rem);
    font-weight: 850;
    letter-spacing: -0.035em;
}

.classroom-heading-count {
    padding: 8px 13px;
    border: 1px solid rgba(188, 203, 185, 0.14);
    border-radius: var(--radius-full);
    background: var(--surface-low);
    color: var(--on-surface-var);
    font-size: 0.7rem;
    font-weight: 750;
}

.classroom-invite-list {
    gap: 10px;
}

.classroom-invite-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 18px;
    border: 1px solid rgba(126, 156, 255, 0.21);
    border-radius: 16px;
    background:
        linear-gradient(100deg, rgba(110, 136, 255, 0.08), transparent 55%),
        var(--surface);
}

.classroom-invite-icon {
    display: grid;
    width: 46px;
    height: 46px;
    flex: 0 0 auto;
    place-items: center;
    border-radius: 14px;
    background: rgba(126, 156, 255, 0.12);
    color: #9eb7ff;
}

.classroom-invite-copy {
    display: grid;
    min-width: 0;
    gap: 3px;
}

.classroom-invite-label {
    color: #9eb7ff;
    font-size: 0.6rem;
    font-weight: 850;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.classroom-invite-copy strong {
    color: var(--on-surface);
    font-size: 0.95rem;
}

.classroom-invite-copy p {
    margin: 0;
    color: var(--on-surface-var);
    font-size: 0.73rem;
}

.classroom-invite-card .classroom-invite-actions {
    margin-left: auto;
}

.classroom-invite-accept,
.classroom-invite-decline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 0;
    font: inherit;
    font-weight: 820;
    cursor: pointer;
}

.classroom-invite-accept {
    gap: 6px;
    min-height: 40px;
    padding: 0 15px;
    border-radius: 11px;
    background: var(--primary);
    color: var(--on-primary);
    font-size: 0.75rem;
}

.classroom-invite-accept .material-symbols-outlined {
    font-size: 17px;
}

.classroom-invite-decline {
    width: 40px;
    height: 40px;
    border: 1px solid rgba(188, 203, 185, 0.15);
    border-radius: 11px;
    background: transparent;
    color: var(--on-surface-var);
}

.classroom-invite-decline .material-symbols-outlined {
    font-size: 19px;
}

.classroom-action-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
    gap: 20px;
}

.classroom-action-card {
    position: relative;
    overflow: hidden;
    padding: clamp(22px, 3vw, 30px);
    border: 1px solid rgba(188, 203, 185, 0.12);
    border-radius: 20px;
    background: var(--surface);
}

.classroom-create-card {
    background:
        radial-gradient(circle at 100% 0%, rgba(83, 224, 118, 0.09), transparent 36%),
        var(--surface);
}

.classroom-join-card {
    background:
        radial-gradient(circle at 100% 0%, rgba(126, 156, 255, 0.11), transparent 40%),
        var(--surface);
}

.classroom-action-heading {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 24px;
}

.classroom-action-icon {
    display: grid;
    width: 48px;
    height: 48px;
    flex: 0 0 auto;
    place-items: center;
    border-radius: 14px;
    background: rgba(83, 224, 118, 0.1);
    color: var(--primary);
}

.classroom-join-card .classroom-action-icon {
    background: rgba(126, 156, 255, 0.11);
    color: #9eb7ff;
}

.classroom-action-heading > div > span {
    color: var(--primary);
    font-size: 0.61rem;
    font-weight: 850;
    letter-spacing: 0.13em;
    text-transform: uppercase;
}

.classroom-join-card .classroom-action-heading > div > span {
    color: #9eb7ff;
}

.classroom-action-heading h3 {
    margin: 4px 0 5px;
    color: var(--on-surface);
    font-size: 1.1rem;
    font-weight: 840;
}

.classroom-action-heading p {
    margin: 0;
    color: var(--on-surface-var);
    font-size: 0.74rem;
    line-height: 1.5;
}

.classroom-create-fields {
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 12px;
}

.classroom-field {
    display: grid;
    gap: 7px;
}

.classroom-field label {
    color: var(--on-surface-var);
    font-size: 0.68rem;
    font-weight: 780;
}

.classroom-field label span {
    margin-left: 4px;
    color: rgba(188, 203, 185, 0.46);
    font-weight: 650;
}

.classroom-field input {
    width: 100%;
    min-width: 0;
    height: 48px;
    padding: 0 15px;
    border: 1px solid rgba(188, 203, 185, 0.13);
    border-radius: 12px;
    outline: 0;
    background: var(--surface-low);
    color: var(--on-surface);
    font: inherit;
    font-size: 0.82rem;
    transition: border-color var(--dur-fast), box-shadow var(--dur-fast);
}

.classroom-field input::placeholder {
    color: rgba(188, 203, 185, 0.38);
}

.classroom-field input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(83, 224, 118, 0.09);
}

.classroom-code-field input {
    color: #c9d5ff;
    font-size: 1rem;
    font-weight: 850;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.classroom-code-field input:focus {
    border-color: #9eb7ff;
    box-shadow: 0 0 0 3px rgba(126, 156, 255, 0.1);
}

.classroom-primary-action,
.classroom-secondary-action {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    min-height: 46px;
    margin-top: 16px;
    padding: 0 18px;
    border: 0;
    border-radius: 12px;
    font: inherit;
    font-size: 0.76rem;
    font-weight: 850;
    cursor: pointer;
    transition: transform var(--dur-fast), box-shadow var(--dur-fast);
}

.classroom-primary-action {
    background: var(--primary);
    color: var(--on-primary);
    box-shadow: 0 12px 28px rgba(83, 224, 118, 0.16);
}

.classroom-secondary-action {
    width: 100%;
    background: #9eb7ff;
    color: #101a36;
    box-shadow: 0 12px 28px rgba(126, 156, 255, 0.14);
}

.classroom-primary-action:hover,
.classroom-secondary-action:hover {
    box-shadow: 0 16px 34px rgba(0, 0, 0, 0.24);
    transform: translateY(-1px);
}

.classroom-primary-action .material-symbols-outlined,
.classroom-secondary-action .material-symbols-outlined {
    font-size: 18px;
}

.classroom-index-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(285px, 1fr));
    gap: 18px;
}

.classroom-index-card {
    position: relative;
    min-width: 0;
    overflow: hidden;
    border: 1px solid rgba(188, 203, 185, 0.12);
    border-radius: 18px;
    background: var(--surface);
    box-shadow: 0 18px 45px rgba(0, 0, 0, 0.14);
    transition: border-color var(--dur-base), box-shadow var(--dur-base), transform var(--dur-base);
}

.classroom-index-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--classroom-accent, var(--primary));
}

.classroom-index-card-1 { --classroom-accent: #53e076; --classroom-accent-rgb: 83, 224, 118; }
.classroom-index-card-2 { --classroom-accent: #9eb7ff; --classroom-accent-rgb: 158, 183, 255; }
.classroom-index-card-3 { --classroom-accent: #ffad98; --classroom-accent-rgb: 255, 173, 152; }
.classroom-index-card-4 { --classroom-accent: #d5a7ff; --classroom-accent-rgb: 213, 167, 255; }

.classroom-index-card:hover {
    border-color: rgba(var(--classroom-accent-rgb), 0.38);
    box-shadow: 0 24px 55px rgba(0, 0, 0, 0.24);
    transform: translateY(-4px);
}

.classroom-index-card > a {
    display: flex;
    flex-direction: column;
    min-height: 220px;
    height: 100%;
    padding: 22px;
    color: inherit;
    text-decoration: none;
}

.classroom-index-card > a:focus-visible {
    outline: 3px solid rgba(var(--classroom-accent-rgb), 0.5);
    outline-offset: -4px;
}

.classroom-card-top,
.classroom-card-footer,
.classroom-member-count,
.classroom-open-action {
    display: flex;
    align-items: center;
}

.classroom-card-top,
.classroom-card-footer {
    justify-content: space-between;
    gap: 12px;
}

.classroom-card-icon {
    display: grid;
    width: 42px;
    height: 42px;
    place-items: center;
    border-radius: 13px;
    background: rgba(var(--classroom-accent-rgb), 0.1);
    color: var(--classroom-accent);
}

.classroom-role-badge {
    padding: 6px 9px;
    border-radius: var(--radius-full);
    background: rgba(var(--classroom-accent-rgb), 0.09);
    color: var(--classroom-accent);
    font-size: 0.58rem;
    font-weight: 850;
    letter-spacing: 0.09em;
    text-transform: uppercase;
}

.classroom-card-copy {
    margin: 22px 0 20px;
}

.classroom-card-copy h3 {
    display: -webkit-box;
    margin: 0;
    overflow: hidden;
    color: var(--on-surface);
    font-size: 1.08rem;
    font-weight: 840;
    letter-spacing: -0.02em;
    line-height: 1.35;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
}

.classroom-card-copy p {
    display: -webkit-box;
    margin: 8px 0 0;
    overflow: hidden;
    color: var(--on-surface-var);
    font-size: 0.73rem;
    line-height: 1.55;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
}

.classroom-card-copy .classroom-card-placeholder {
    color: rgba(188, 203, 185, 0.48);
    font-style: italic;
}

.classroom-card-footer {
    margin-top: auto;
}

.classroom-member-count {
    gap: 6px;
    color: var(--on-surface-var);
    font-size: 0.69rem;
    font-weight: 720;
}

.classroom-member-count .material-symbols-outlined {
    font-size: 17px;
}

.classroom-open-action {
    gap: 5px;
    color: var(--classroom-accent);
    font-size: 0.7rem;
    font-weight: 850;
}

.classroom-open-action .material-symbols-outlined {
    font-size: 16px;
    transition: transform var(--dur-fast);
}

.classroom-index-card:hover .classroom-open-action .material-symbols-outlined {
    transform: translateX(3px);
}

.classroom-empty-state {
    grid-column: 1 / -1;
    display: grid;
    justify-items: center;
    min-height: 310px;
    place-content: center;
    padding: 44px 24px;
    border: 1px dashed rgba(126, 156, 255, 0.25);
    border-radius: 20px;
    background:
        radial-gradient(circle at 50% 0%, rgba(126, 156, 255, 0.1), transparent 45%),
        var(--surface-low);
    text-align: center;
}

.classroom-empty-visual {
    position: relative;
    display: grid;
    width: 68px;
    height: 68px;
    margin-bottom: 18px;
    place-items: center;
    border-radius: 20px;
    background: rgba(126, 156, 255, 0.1);
    color: #9eb7ff;
    transform: rotate(-3deg);
}

.classroom-empty-visual .material-symbols-outlined {
    font-size: 32px;
}

.classroom-empty-visual i {
    position: absolute;
    width: 13px;
    height: 13px;
    border: 3px solid var(--surface-low);
    border-radius: 50%;
    background: var(--primary);
}

.classroom-empty-visual i:first-of-type {
    top: -3px;
    right: -2px;
}

.classroom-empty-visual i:last-of-type {
    bottom: 1px;
    left: -5px;
    background: #ffad98;
}

.classroom-empty-state h3 {
    margin: 0;
    color: var(--on-surface);
    font-size: 1.25rem;
    font-weight: 850;
}

.classroom-empty-state p {
    max-width: 470px;
    margin: 10px 0 22px;
    color: var(--on-surface-var);
    font-size: 0.84rem;
    line-height: 1.65;
}

.classroom-empty-state a {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    color: var(--primary);
    font-size: 0.77rem;
    font-weight: 850;
    text-decoration: none;
}

.classroom-empty-state a .material-symbols-outlined {
    font-size: 17px;
}

@media (max-width: 980px) {
    .classroom-index-hero,
    .classroom-action-grid {
        grid-template-columns: 1fr;
    }

    .classroom-hero-visual {
        min-height: 230px;
    }

    .classroom-action-card {
        max-width: 760px;
    }
}

@media (max-width: 620px) {
    .classroom-index-page {
        gap: 38px;
        padding-bottom: 24px;
    }

    .classroom-index-hero {
        margin-inline: -8px;
        padding: 30px 20px 24px;
        border-radius: 22px;
    }

    .classroom-hero-copy h1 {
        font-size: clamp(2.5rem, 13vw, 3.4rem);
    }

    .classroom-hero-copy > p {
        line-height: 1.6;
    }

    .classroom-hero-stats {
        gap: 13px;
        margin-top: 26px;
    }

    .classroom-hero-stats > div {
        display: grid;
        gap: 1px;
    }

    .classroom-hero-stats > i {
        height: 35px;
    }

    .classroom-hero-visual {
        min-height: 205px;
    }

    .classroom-visual-note {
        left: 3px;
    }

    .classroom-invite-card {
        align-items: flex-start;
        flex-wrap: wrap;
    }

    .classroom-invite-copy {
        flex: 1 1 calc(100% - 64px);
    }

    .classroom-invite-card .classroom-invite-actions {
        width: 100%;
        justify-content: flex-end;
    }

    .classroom-section-heading {
        align-items: flex-start;
        flex-direction: column;
        gap: 12px;
    }

    .classroom-action-card {
        padding: 20px;
    }

    .classroom-create-fields {
        grid-template-columns: 1fr;
    }

    .classroom-primary-action {
        width: 100%;
    }

    .classroom-index-grid {
        grid-template-columns: 1fr;
    }

    .classroom-index-notice {
        margin-top: -20px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .classroom-index-card,
    .classroom-open-action .material-symbols-outlined,
    .classroom-primary-action,
    .classroom-secondary-action {
        transition: none;
    }
}

/* Classroom chat */
/* Classroom chat — floating panel next to the assistant */
.classroom-chat-float {
    position: fixed;
    right: calc(28px + var(--assistant-offset, 190px));
    bottom: 28px;
    z-index: 1190;
    display: flex;
    align-items: flex-end;
    flex-direction: column;
    gap: 14px;
}

.classroom-chat-fab {
    position: relative;
    background: var(--surface-highest);
    color: var(--on-surface);
}

.classroom-chat-fab .classroom-unread-badge {
    position: absolute;
    top: -4px;
    right: -4px;
    margin-left: 0;
}

.classroom-chat-popover {
    display: flex;
}

.classroom-chat-popover[hidden] {
    display: none;
}

.classroom-chat-tab-label {
    display: inline-flex;
    align-items: center;
    padding: 0 10px;
    color: var(--on-surface);
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 0.08em;
    cursor: default;
}

.classroom-chat-status {
    color: var(--on-surface-var);
    font-size: 11px;
    font-weight: 700;
    margin-right: 4px;
    white-space: nowrap;
}

.classroom-chat-pane {
    display: flex;
    flex-direction: column;
    flex: 1 1 auto;
    min-height: 0;
}

.classroom-chat-message {
    max-width: 88%;
    align-self: flex-start;
}

.classroom-chat-message.is-own {
    align-self: flex-end;
    align-items: flex-end;
}

.classroom-chat-message .classroom-chat-meta {
    display: flex;
    align-items: baseline;
    gap: 8px;
    padding: 0 2px;
    color: var(--on-surface-var);
    font-size: 11px;
}

.classroom-chat-meta strong {
    color: var(--on-surface);
    font-size: 11px;
    font-weight: 800;
}

.classroom-chat-bubble {
    background: var(--surface-highest);
    color: var(--on-surface);
    max-width: 100%;
}

.classroom-chat-message.is-own .classroom-chat-bubble {
    background: var(--primary-container, #1db954);
    color: var(--on-primary, #003914);
}

.classroom-chat-form {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px;
    border-top: 1px solid rgba(61, 74, 61, 0.42);
    background: var(--surface-low, #0d1c32);
}

.classroom-chat-form .classroom-chat-input {
    flex: 1;
    min-width: 0;
}

@media (max-width: 720px) {
    .classroom-chat-float {
        right: 16px;
        bottom: calc(142px + env(safe-area-inset-bottom));
    }

    .classroom-chat-float.is-open {
        top: 64px;
        right: 12px;
        bottom: calc(72px + env(safe-area-inset-bottom));
        left: 12px;
        align-items: stretch;
        gap: 0;
    }

    .classroom-chat-float.is-open .classroom-chat-fab {
        display: none;
    }

    .classroom-chat-float.is-open .classroom-chat-popover {
        width: 100%;
        height: 100%;
        max-height: none;
    }
}

.classroom-unread-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 20px;
    height: 20px;
    margin-left: 6px;
    padding: 0 6px;
    border-radius: 9999px;
    background: var(--primary);
    color: var(--on-primary);
    font-size: 11px;
    font-weight: 800;
}

/* Classroom video call */
.classroom-call-page .books-header {
    align-items: center;
}

.call-lobby-card {
    max-width: 420px;
    margin: 48px auto 0;
    padding: 40px 32px;
    background: var(--surface);
    border-radius: 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    text-align: center;
}

.call-lobby-avatar {
    width: 88px;
    height: 88px;
    border-radius: 50%;
    background: var(--surface-highest);
    color: var(--on-surface);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    font-weight: 800;
    margin-bottom: 8px;
}

.call-lobby-title {
    font-size: 20px;
    font-weight: 800;
    margin: 0;
}

.call-lobby-subtitle {
    color: var(--on-surface-var);
    font-size: 14px;
    margin: 0 0 16px;
}

.call-lobby-presence {
    color: var(--on-surface-var);
    font-size: 13px;
    font-weight: 700;
    margin: -8px 0 16px;
}

/* "Live" pill on the classroom header's call link */
.classroom-call-live {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-left: 8px;
    padding: 2px 10px;
    border-radius: 9999px;
    background: rgba(255, 255, 255, 0.18);
    font-size: 12px;
    font-weight: 800;
}

.classroom-call-live .call-status-dot {
    background: #ff5f57;
}

.classroom-call-live[hidden] {
    display: none;
}

.call-lobby-presence[hidden] {
    display: none;
}

/* Full-screen meeting stage (Teams-style) */
.call-stage {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    background: var(--surface-lowest);
}

body.call-in-progress {
    overflow: hidden;
}

.call-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 14px 24px;
    background: rgba(4, 19, 41, 0.72);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
}

.call-topbar-info {
    display: flex;
    align-items: center;
    gap: 14px;
    min-width: 0;
}

.call-topbar-name {
    font-size: 15px;
    font-weight: 800;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.call-status-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 4px 12px;
    border-radius: 9999px;
    background: var(--surface-high);
    color: var(--on-surface-var);
    font-size: 12px;
    font-weight: 700;
    white-space: nowrap;
}

.call-status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--on-surface-var);
}

.classroom-call-page.is-connected .call-status-dot {
    background: var(--primary);
}

.call-participant-count {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--on-surface-var);
    font-size: 13px;
    font-weight: 700;
}

.call-participant-count .material-symbols-outlined {
    font-size: 18px;
}

.call-stage-main {
    flex: 1;
    min-height: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px 24px 110px;
    overflow-y: auto;
}

.classroom-call-grid {
    display: grid;
    grid-template-columns: repeat(var(--call-cols, 1), minmax(0, 1fr));
    gap: 12px;
    width: 100%;
    max-width: 1400px;
    align-content: center;
    justify-content: center;
}

.classroom-call-grid[data-count="1"] {
    max-width: 960px;
}

.classroom-call-grid[data-count="2"],
.classroom-call-grid[data-count="3"],
.classroom-call-grid[data-count="4"] {
    max-width: 1200px;
}

.classroom-call-grid:empty::before {
    content: "Waiting for others to join…";
    display: block;
    text-align: center;
    color: var(--on-surface-var);
    font-size: 15px;
    font-weight: 600;
}

.classroom-call-tile {
    position: relative;
    background: var(--surface);
    border-radius: 12px;
    overflow: hidden;
    aspect-ratio: 16 / 9;
    display: flex;
    align-items: center;
    justify-content: center;
}

.classroom-call-video,
.classroom-call-video > div,
.classroom-call-video video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.classroom-call-video {
    position: absolute;
    inset: 0;
    display: none;
}

.classroom-call-tile.has-video .classroom-call-video {
    display: block;
}

.classroom-call-tile.has-video .classroom-call-avatar {
    display: none;
}

.classroom-call-avatar {
    width: clamp(48px, 25%, 96px);
    aspect-ratio: 1;
    border-radius: 50%;
    background: var(--surface-highest);
    color: var(--on-surface);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: clamp(16px, 3vw, 32px);
    font-weight: 800;
}

.classroom-call-name {
    position: absolute;
    left: 10px;
    bottom: 8px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 3px 10px;
    border-radius: 9999px;
    background: rgba(0, 0, 0, 0.55);
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    max-width: calc(100% - 20px);
}

.classroom-call-name .classroom-call-muted {
    font-size: 14px;
    color: var(--error);
}

/* Local picture-in-picture tile */
.call-pip {
    position: absolute;
    right: 20px;
    bottom: 104px;
    width: 220px;
    aspect-ratio: 16 / 9;
    border-radius: 12px;
    overflow: hidden;
    background: var(--surface-high);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
}

.call-pip .classroom-call-avatar {
    width: 52px;
    font-size: 18px;
}

/* Bottom control bar */
.call-controls {
    position: absolute;
    left: 50%;
    bottom: 24px;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 10px 18px;
    border-radius: 9999px;
    background: rgba(17, 32, 54, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
    z-index: 3;
}

.call-ctrl {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--surface-highest);
    color: var(--on-surface);
    transition: background 0.15s ease, color 0.15s ease;
}

.call-ctrl:hover {
    background: var(--surface-bright);
}

.call-ctrl .material-symbols-outlined {
    font-size: 24px;
}

.call-ctrl.is-off {
    background: #fff;
    color: #1a1a2e;
}

.call-ctrl-danger {
    background: #d64545;
    color: #fff;
    width: 64px;
    border-radius: 9999px;
}

.call-ctrl-danger:hover {
    background: #b93a3a;
}

@media (max-width: 700px) {
    .call-stage-main {
        padding: 12px 12px 150px;
    }

    .call-pip {
        width: 132px;
        right: 12px;
        bottom: 108px;
    }

    .call-ctrl {
        width: 46px;
        height: 46px;
    }

    .call-controls {
        bottom: 18px;
    }
}

/* Classroom planning */
.classroom-lesson {
    margin-top: 24px;
}

.classroom-lesson-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 12px;
}

.classroom-due.is-overdue {
    color: #d64545;
    font-weight: 700;
}

.btn-icon-tts {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    padding: 0;
    margin-left: 6px;
    vertical-align: middle;
    border: 1px solid rgba(83, 224, 118, 0.24);
    border-radius: 8px;
    background: rgba(83, 224, 118, 0.08);
    color: var(--primary);
    cursor: pointer;
    transition: background 120ms ease, transform 120ms ease;
}

.btn-icon-tts:hover {
    background: rgba(83, 224, 118, 0.18);
}

.btn-icon-tts .material-symbols-outlined {
    font-size: 18px;
    line-height: 1;
}

.btn-icon-tts.is-playing {
    background: rgba(83, 224, 118, 0.28);
    animation: btn-icon-tts-pulse 900ms ease-in-out infinite;
}

@keyframes btn-icon-tts-pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.08); }
}

/* Custom quiz builder and player */
/* Starting a custom quiz POSTs so the row exists before the editor opens. The form
   wrapper must not disturb the surrounding flex rows, and the button needs the page
   font that the anchor it replaced inherited for free. */
.custom-quiz-new-form { display: contents; }
button.btn-hero, button.btn-new-quiz { font: inherit; }
.custom-quiz-library { margin-top: 2rem; }
.custom-quiz-card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1rem; }
.custom-quiz-card { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 1rem 1.15rem; border: 1px solid var(--border-color, rgba(255,255,255,.1)); border-radius: 16px; background: var(--surface, #171d1a); }
.custom-quiz-card h3 { margin: 0 0 .4rem; }
.custom-quiz-card-actions { display: flex; align-items: center; flex-wrap: wrap; gap: .5rem; }
.custom-quiz-draft { opacity: .68; }

.custom-builder, .custom-player { width: min(1500px, 100%); margin: 0 auto; }
.custom-builder-header, .custom-player-header { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-bottom: 1.25rem; }
.custom-builder-back { display: inline-block; margin-bottom: .5rem; color: var(--muted, #a9b2ac); text-decoration: none; }
.custom-builder-name { display: block; width: min(620px, 75vw); padding: .15rem 0; border: 0; border-bottom: 1px solid transparent; background: transparent; color: inherit; font: inherit; font-size: clamp(1.7rem, 4vw, 2.65rem); font-weight: 800; }
.custom-builder-name:focus { outline: 0; border-bottom-color: var(--primary); }
.custom-builder-header p, .custom-player-header p { margin: .35rem 0 0; color: var(--muted, #a9b2ac); }
.custom-builder-actions { display: flex; gap: .6rem; flex-wrap: wrap; }
.custom-builder-layout { display: grid; grid-template-columns: 220px minmax(0, 1fr) 300px; gap: 1rem; align-items: start; }
.custom-block-palette, .custom-inspector, .custom-canvas-wrap { border: 1px solid var(--border-color, rgba(255,255,255,.1)); border-radius: 18px; background: var(--surface, #171d1a); }
.custom-block-palette, .custom-inspector { position: sticky; top: 1rem; max-height: calc(100vh - 2rem); overflow: auto; padding: 1rem; }
.custom-block-palette h2, .custom-inspector h2 { margin: 0; font-size: 1.05rem; }
.custom-block-palette > p, .custom-inspector > p { color: var(--muted, #a9b2ac); font-size: .86rem; }
.custom-builder-runtime { margin: -.35rem 0 .85rem; color: var(--muted, #a9b2ac); font-size: .78rem; font-weight: 700; }
.custom-builder-runtime.is-ready { color: var(--primary); }
.custom-palette-block { display: flex; align-items: stretch; width: 100%; margin: .45rem 0; border: 1px solid rgba(83,224,118,.18); border-radius: 11px; background: rgba(83,224,118,.06); color: inherit; overflow: hidden; }
.custom-palette-block:hover { background: rgba(83,224,118,.13); }
.custom-palette-drag { display: flex; align-items: center; flex: 1; gap: .55rem; min-width: 0; padding: .68rem .5rem .68rem .75rem; border: 0; background: transparent; color: inherit; cursor: grab; text-align: left; touch-action: none; }
.custom-palette-drag > span:not(.material-symbols-outlined) { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.custom-palette-add { display: inline-grid; place-items: center; width: 40px; padding: 0; border: 0; border-left: 1px solid rgba(83,224,118,.18); background: rgba(83,224,118,.06); color: var(--primary); cursor: pointer; }
.custom-palette-add:hover, .custom-palette-add:focus-visible { background: rgba(83,224,118,.2); }
.custom-palette-block .material-symbols-outlined { font-size: 19px; color: var(--primary); }
.custom-canvas-wrap { min-height: 640px; padding: 1rem; }
.custom-canvas-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin: 0 0 .75rem; color: var(--muted, #a9b2ac); }
.custom-canvas-toolbar > span { display: inline-flex; align-items: center; gap: .4rem; color: var(--on-surface, #fff); font-size: .82rem; font-weight: 800; }
.custom-canvas-toolbar .material-symbols-outlined { color: var(--primary); font-size: 18px; }
.custom-canvas-toolbar small { font-size: .75rem; }
.custom-canvas, .custom-preview-grid, .custom-player-grid { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); grid-auto-rows: minmax(72px, auto); gap: .85rem; align-items: stretch; }
.custom-canvas { position: relative; min-height: 560px; padding: 1.4rem .45rem .45rem; border: 1px dashed rgba(83,224,118,.16); border-radius: 14px; background-color: rgba(0,0,0,.08); background-image: linear-gradient(to right, rgba(255,255,255,.035) 1px, transparent 1px), linear-gradient(to bottom, rgba(255,255,255,.025) 1px, transparent 1px); background-size: calc(100% / 12) 100%, 100% 96px; align-content: start; }
.custom-canvas[hidden], .custom-preview[hidden], .custom-inspector[hidden] { display: none; }
.custom-canvas-empty { grid-column: 1 / -1; grid-row: 1; display: grid; place-items: center; min-height: 510px; border: 2px dashed rgba(255,255,255,.12); border-radius: 14px; color: var(--muted, #a9b2ac); pointer-events: none; }
.custom-canvas-block, .custom-preview-block, .custom-play-block { grid-column: var(--custom-column, auto) / span var(--custom-span, 12); grid-row: var(--custom-row, auto); min-width: 0; }
.custom-canvas-block { position: relative; padding: 1rem; cursor: default; overflow: visible; transition: border-color .15s ease, box-shadow .15s ease, opacity .15s ease; }
.custom-canvas-block.is-selected { border-color: var(--primary); box-shadow: 0 0 0 2px rgba(83,224,118,.12); }
.custom-canvas-block.is-dragging { opacity: .22; }
.custom-canvas-chrome { position: absolute; top: 0; left: .45rem; z-index: 4; display: flex; align-items: center; max-width: calc(100% - .9rem); min-height: 31px; padding: 2px 4px; border: 1px solid var(--border-color, rgba(255,255,255,.14)); border-radius: 9px; background: var(--surface-highest, #27302c); box-shadow: 0 7px 20px rgba(0,0,0,.28); opacity: 0; pointer-events: none; transform: translateY(-58%); transition: opacity .15s ease; }
.custom-canvas-block:hover .custom-canvas-chrome, .custom-canvas-block:focus-within .custom-canvas-chrome { opacity: 1; pointer-events: auto; }
.custom-canvas-type { max-width: 105px; overflow: hidden; padding: 0 .35rem; font-size: .68rem; font-weight: 850; text-overflow: ellipsis; text-transform: uppercase; white-space: nowrap; }
.custom-drag-handle { display: inline-grid; place-items: center; padding: 2px; border: 0; background: transparent; color: var(--muted, #a9b2ac); cursor: grab; touch-action: none; }
.custom-drag-handle:active { cursor: grabbing; }
.custom-canvas-controls { display: flex; gap: 0; }
.custom-canvas-controls .btn-icon { width: 27px; height: 27px; }
.custom-canvas-controls .material-symbols-outlined { font-size: 16px; }
.custom-block-content { height: 100%; pointer-events: none; }
.custom-resize-handle { position: absolute; z-index: 3; top: 50%; right: -6px; width: 12px; height: 38px; padding: 0; border: 1px solid rgba(83,224,118,.55); border-radius: 6px; background: var(--surface-highest, #27302c); cursor: ew-resize; opacity: 0; touch-action: none; transform: translateY(-50%); }
.custom-resize-handle::after { content: ""; position: absolute; inset: 7px 4px; border-right: 1px solid var(--primary); border-left: 1px solid var(--primary); }
.custom-canvas-block:hover .custom-resize-handle, .custom-canvas-block:focus-within .custom-resize-handle { opacity: 1; }
.custom-drop-indicator { z-index: 2; min-height: 72px; border: 2px solid var(--primary); border-radius: 14px; background: rgba(83,224,118,.13); box-shadow: inset 0 0 0 2px rgba(83,224,118,.08); pointer-events: none; }
.custom-drop-indicator[hidden] { display: none; }
.custom-drag-ghost { position: fixed; z-index: 2000; max-width: 210px; padding: .6rem .8rem; border: 1px solid rgba(83,224,118,.5); border-radius: 10px; background: var(--surface-highest, #27302c); color: var(--on-surface, #fff); box-shadow: 0 12px 35px rgba(0,0,0,.38); font-size: .8rem; font-weight: 800; opacity: .92; pointer-events: none; }
.is-custom-dragging, .is-custom-dragging * { cursor: grabbing !important; user-select: none !important; }
.custom-inspector-field { display: grid; gap: .35rem; margin: .8rem 0; font-size: .86rem; }
.custom-inspector-field > span, .custom-binding-editor legend { font-weight: 700; }
.custom-binding-editor { margin: 1rem 0; padding: .75rem; border: 1px solid rgba(255,255,255,.1); border-radius: 12px; }
.custom-inspector h3 { margin: 1.1rem 0 .5rem; font-size: .95rem; }
.custom-inspector-type { padding: .45rem .6rem; border-radius: 8px; background: rgba(83,224,118,.08); color: var(--primary) !important; }
.custom-option-editor { display: grid; grid-template-columns: minmax(0, 1fr) 95px auto auto; gap: .35rem; align-items: center; margin: .45rem 0; }
.custom-preview { min-height: 560px; }
.custom-preview-block, .custom-play-block { padding: 1rem; border: 1px solid rgba(255,255,255,.09); border-radius: 14px; background: rgba(255,255,255,.025); }
.custom-preview-block h2, .custom-play-block h2 { margin: 0; }
.custom-instruction { margin: 0; color: var(--muted, #a9b2ac); }
.custom-bound-label { margin: 0; font-size: 1.25rem; font-weight: 750; }
.custom-preview-block label:not(.custom-choice):not(.custom-check), .custom-play-block label:not(.custom-choice):not(.custom-check) { display: grid; gap: .45rem; font-weight: 700; }
.custom-preview-block fieldset, .custom-play-block fieldset { margin: 0; padding: 0; border: 0; }
.custom-preview-block legend, .custom-play-block legend { margin-bottom: .65rem; font-weight: 750; }
.custom-choice, .custom-check { display: flex; align-items: center; gap: .55rem; margin: .45rem 0; cursor: pointer; }
.custom-choice input, .custom-check input { accent-color: var(--primary); }
.custom-word-bank { display: flex; align-items: center; flex-wrap: wrap; gap: .5rem; }
.custom-word-bank > span { width: 100%; font-weight: 750; }
.custom-word-bank button { padding: .45rem .75rem; border: 1px solid rgba(83,224,118,.35); border-radius: 999px; background: rgba(83,224,118,.09); color: inherit; cursor: pointer; }
.custom-player { max-width: 1100px; }
.custom-player-header { display: block; }
.custom-player-header h1 { margin: .2rem 0 1rem; font-size: clamp(2rem, 5vw, 3.4rem); }
.custom-answer-feedback { min-height: 1.25rem; margin-top: .45rem; font-size: .86rem; font-weight: 700; }
.custom-answer-feedback.is-correct { color: var(--primary); }
.custom-answer-feedback.is-incorrect, .custom-answer-feedback.is-incomplete { color: #ff8585; }
.custom-overall-feedback { padding: .8rem 1rem; border-radius: 10px; background: rgba(83,224,118,.08); }

/* Custom quiz design starters */
.custom-template-gallery { margin: 0 0 1rem; padding: 1rem; border: 1px solid var(--border-color, rgba(255,255,255,.1)); border-radius: 18px; background: linear-gradient(145deg, rgba(255,255,255,.035), rgba(255,255,255,.012)); }
.custom-template-heading { display: flex; align-items: end; justify-content: space-between; gap: 1.5rem; margin-bottom: .85rem; }
.custom-template-heading h2 { margin: .15rem 0 0; font-size: 1.15rem; }
.custom-template-heading > p { max-width: 590px; margin: 0; color: var(--muted, #a9b2ac); font-size: .82rem; }
.custom-template-eyebrow { color: var(--primary); font-size: .68rem; font-weight: 900; letter-spacing: .12em; text-transform: uppercase; }
.custom-template-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: .7rem; }
.custom-template-card { position: relative; display: grid; grid-template-rows: 78px 1fr auto; min-width: 0; overflow: hidden; border: 1px solid rgba(255,255,255,.09); border-radius: 14px; background: rgba(5,14,24,.32); transition: border-color .16s ease, transform .16s ease; }
.custom-template-card:hover { border-color: rgba(255,255,255,.22); transform: translateY(-2px); }
.custom-template-card.is-active { border-color: var(--primary); box-shadow: 0 0 0 2px rgba(83,224,118,.1); }
.custom-template-card.is-active::after { content: "Active style"; position: absolute; top: 8px; right: 8px; padding: .22rem .45rem; border-radius: 999px; background: var(--primary); color: #082012; font-size: .6rem; font-weight: 900; text-transform: uppercase; }
.custom-template-card-preview { position: relative; display: grid; grid-template-columns: 1fr 1.6fr; grid-template-rows: repeat(2, 1fr); gap: 5px; padding: 13px; overflow: hidden; }
.custom-template-card-preview .material-symbols-outlined { z-index: 1; grid-row: 1 / 3; display: grid; place-items: center; border-radius: 9px; font-size: 25px; }
.custom-template-card-preview i { display: block; border-radius: 999px; }
.custom-template-card-preview i:last-child { grid-column: 1 / -1; height: 5px; opacity: .6; }
.custom-template-card-copy { padding: .75rem .8rem .55rem; }
.custom-template-card-copy h3 { margin: 0 0 .32rem; font-size: .9rem; }
.custom-template-card-copy p { margin: 0 0 .55rem; color: var(--muted, #a9b2ac); font-size: .73rem; line-height: 1.4; }
.custom-template-card-copy small { color: rgba(255,255,255,.52); font-size: .64rem; }
.custom-template-card-actions { display: flex; align-items: center; gap: .35rem; padding: .65rem .8rem .75rem; }
.custom-template-card-actions .btn-secondary, .custom-template-card-actions .btn-linkish { min-height: 30px; padding: .35rem .58rem; font-size: .68rem; }
.custom-template-card-editorial .custom-template-card-preview { background: linear-gradient(135deg, #e9eef6, #cbd7e9); }
.custom-template-card-editorial .custom-template-card-preview .material-symbols-outlined { background: #16243b; color: #dce8fa; }
.custom-template-card-editorial .custom-template-card-preview i { background: #526782; }
.custom-template-card-aurora .custom-template-card-preview { background: linear-gradient(135deg, #22294f, #4e2774 55%, #b44c7d); }
.custom-template-card-aurora .custom-template-card-preview .material-symbols-outlined { background: rgba(255,255,255,.15); color: #ffd4ec; }
.custom-template-card-aurora .custom-template-card-preview i { background: linear-gradient(90deg, #8cf4dc, #f4a8d0); }
.custom-template-card-paper .custom-template-card-preview { background: #f3ead8; }
.custom-template-card-paper .custom-template-card-preview .material-symbols-outlined { border: 1px solid #c6b99d; background: #fffaf0; color: #6f5135; }
.custom-template-card-paper .custom-template-card-preview i { border: 1px solid #c6b99d; background: #fffaf0; }
.custom-template-card-word_lab .custom-template-card-preview { background: linear-gradient(135deg, #162b27, #224e43); }
.custom-template-card-word_lab .custom-template-card-preview .material-symbols-outlined { background: #d4ff62; color: #173021; }
.custom-template-card-word_lab .custom-template-card-preview i { background: #75e5c0; }

/* Editorial: content first, almost no boxes. */
[data-custom-style="editorial"] :is(.custom-player-grid, .custom-preview-grid) { gap: .7rem 1.15rem; }
[data-custom-style="editorial"] .custom-play-block { border-color: transparent; background: transparent; }
[data-custom-style="editorial"] .custom-play-block[data-block-type="quiz_heading"] { padding: .25rem 0 .7rem; border-bottom: 1px solid rgba(163,188,222,.28); border-radius: 0; }
[data-custom-style="editorial"] .custom-play-block[data-block-type="quiz_heading"] h2 { font-family: Georgia, 'Times New Roman', serif; font-size: clamp(1.9rem, 4vw, 3rem); font-weight: 500; letter-spacing: -.03em; }
[data-custom-style="editorial"] .custom-play-block[data-block-type="instruction_label"] { padding: .2rem 0 1rem; }
[data-custom-style="editorial"] .custom-play-block[data-block-type="prompt_label"],
[data-custom-style="editorial"] .custom-play-block[data-block-type="translation_label"] { display: flex; align-items: center; min-height: 78px; padding: 1rem 1.15rem; border: 0; border-left: 3px solid #8ba7cd; border-radius: 4px 0 0 4px; background: linear-gradient(90deg, rgba(139,167,205,.13), transparent); }
[data-custom-style="editorial"] .custom-bound-label { font-family: Georgia, 'Times New Roman', serif; font-size: 1.45rem; font-weight: 500; }
[data-custom-style="editorial"] .custom-play-block:is([data-block-type="text_input"], [data-block-type="textarea"], [data-block-type="radio_group"], [data-block-type="multi_select_group"], [data-block-type="select_menu"], [data-block-type="checkbox"]) { padding: .72rem 0; }
[data-custom-style="editorial"] .form-input { border: 0; border-bottom: 2px solid rgba(162,188,222,.42); border-radius: 5px 5px 0 0; background: rgba(143,169,204,.09); }
[data-custom-style="editorial"] .form-input:focus { border-bottom-color: #a9c6ec; box-shadow: none; }
[data-custom-style="editorial"] .custom-play-block[data-block-type="feedback_message"] { padding: .3rem 0; }

/* Aurora: layered glass cards and warm/cool color. */
[data-custom-style="aurora"] :is(.custom-canvas, .custom-preview-grid, .custom-player-grid) { padding: 1.15rem; border: 1px solid rgba(218,177,255,.2); border-radius: 26px; background-color: #181b36; background-image: radial-gradient(circle at 8% 8%, rgba(72,225,206,.18), transparent 34%), radial-gradient(circle at 92% 10%, rgba(235,86,164,.23), transparent 36%), linear-gradient(145deg, #171d38, #211731); }
[data-custom-style="aurora"] .custom-play-block { border-color: rgba(255,255,255,.1); background: rgba(255,255,255,.07); box-shadow: 0 14px 30px rgba(6,7,24,.2); backdrop-filter: blur(10px); }
[data-custom-style="aurora"] .custom-play-block[data-block-type="quiz_heading"],
[data-custom-style="aurora"] .custom-play-block[data-block-type="instruction_label"] { border-color: transparent; background: transparent; box-shadow: none; }
[data-custom-style="aurora"] .custom-play-block[data-block-type="quiz_heading"] h2 { font-size: clamp(2rem, 4vw, 3.2rem); background: linear-gradient(90deg, #a5f3df, #ffd0e8 72%); background-clip: text; color: transparent; letter-spacing: -.04em; }
[data-custom-style="aurora"] .custom-play-block[data-block-type="prompt_label"] { min-height: 100px; background: linear-gradient(135deg, rgba(74,218,203,.18), rgba(227,102,175,.14)); }
[data-custom-style="aurora"] .custom-bound-label { font-size: 1.55rem; }
[data-custom-style="aurora"] .form-input { border-color: rgba(210,195,255,.2); background: rgba(7,11,31,.45); }
[data-custom-style="aurora"] .custom-choice { padding: .6rem .7rem; border: 1px solid rgba(255,255,255,.09); border-radius: 10px; background: rgba(8,12,34,.3); }
[data-custom-style="aurora"] .btn-submit { background: linear-gradient(90deg, #65e3c5, #f193c5); color: #17152a; }

/* Paper: an intentionally light, printable worksheet. */
[data-custom-style="paper"] :is(.custom-canvas, .custom-preview-grid, .custom-player-grid) { padding: clamp(1rem, 3vw, 2.2rem); border-radius: 8px; background-color: #f3ecde; background-image: linear-gradient(rgba(106,84,57,.055) 1px, transparent 1px); background-size: 100% 34px; color: #26303a; box-shadow: 0 18px 55px rgba(0,0,0,.2); }
[data-custom-style="paper"] .custom-play-block { border-color: transparent; background: rgba(255,252,246,.58); }
[data-custom-style="paper"] .custom-play-block[data-block-type="quiz_heading"] { padding: 0 0 .8rem; border-bottom: 3px double #8f795e; border-radius: 0; background: transparent; }
[data-custom-style="paper"] .custom-play-block[data-block-type="quiz_heading"] h2 { font-family: Georgia, 'Times New Roman', serif; font-size: clamp(2rem, 4vw, 3rem); color: #3c2e21; }
[data-custom-style="paper"] .custom-play-block[data-block-type="instruction_label"] { padding: .7rem 0 1rem; background: transparent; }
[data-custom-style="paper"] .custom-instruction { color: #665b4d; }
[data-custom-style="paper"] .custom-bound-label { color: #513d2c; font-family: Georgia, 'Times New Roman', serif; font-size: 1.35rem; }
[data-custom-style="paper"] .custom-play-block legend, [data-custom-style="paper"] .custom-play-block label { color: #26303a; }
[data-custom-style="paper"] .custom-choice { padding: .58rem .7rem; border: 1px solid #d6c8b4; border-radius: 7px; background: #fffaf1; }
[data-custom-style="paper"] .form-input { border-color: #cfc0aa; background: rgba(255,255,255,.76); color: #26303a; }
[data-custom-style="paper"] .custom-overall-feedback { border: 1px dashed #a38d70; background: rgba(218,204,181,.42); color: #4b3b2c; }
[data-custom-style="paper"] .custom-canvas-chrome { color: #f4f6f4; }

/* Word lab: bank first, friendly high-contrast guidance. */
[data-custom-style="word_lab"] :is(.custom-canvas, .custom-preview-grid, .custom-player-grid) { padding: 1.15rem; border: 1px solid rgba(139,255,204,.16); border-radius: 24px; background: linear-gradient(150deg, #10241f, #142d29 55%, #10221f); }
[data-custom-style="word_lab"] .custom-play-block { border-color: rgba(138,237,198,.12); background: rgba(6,17,15,.24); }
[data-custom-style="word_lab"] .custom-play-block[data-block-type="quiz_heading"],
[data-custom-style="word_lab"] .custom-play-block[data-block-type="instruction_label"] { border-color: transparent; background: transparent; }
[data-custom-style="word_lab"] .custom-play-block[data-block-type="quiz_heading"] h2 { font-size: clamp(2rem, 4vw, 3rem); color: #d9ff72; letter-spacing: -.04em; }
[data-custom-style="word_lab"] .custom-play-block[data-block-type="word_bank"] { padding: 1.2rem; border: 1px solid rgba(217,255,114,.35); background: rgba(217,255,114,.08); box-shadow: inset 0 0 30px rgba(137,255,204,.04); }
[data-custom-style="word_lab"] .custom-word-bank > span { color: #d9ff72; font-size: .72rem; letter-spacing: .1em; text-transform: uppercase; }
[data-custom-style="word_lab"] .custom-word-bank button { border-color: rgba(217,255,114,.48); background: #d9ff72; color: #193126; font-weight: 850; }
[data-custom-style="word_lab"] .custom-play-block[data-block-type="prompt_label"] { display: flex; align-items: center; border-color: transparent; background: transparent; }
[data-custom-style="word_lab"] .custom-bound-label { color: #8cf1ce; font-size: 1.35rem; }
[data-custom-style="word_lab"] .form-input { border: 1px dashed rgba(139,241,205,.4); background: rgba(1,10,8,.35); }
[data-custom-style="word_lab"] .btn-submit { background: #d9ff72; color: #173023; }

/* Textbook-style single-line answers: the real control is the blank, not a second box below it. */
:is(.custom-preview-block, .custom-play-block) label.custom-inline-answer { display: flex !important; align-items: baseline; flex-wrap: wrap; gap: .28rem; min-height: 2.4rem; font-size: 1rem; font-weight: 720; line-height: 1.6; }
:is(.custom-preview-block, .custom-play-block) .custom-inline-answer input.form-input { flex: 0 1 14rem; width: min(14rem, 100%); min-width: 6rem; padding: .2rem .15rem .15rem; border: 0; border-bottom: 2px solid rgba(162,188,222,.52); border-radius: 0; background: transparent; box-shadow: none; }
:is(.custom-preview-block, .custom-play-block) .custom-inline-answer input.form-input:focus { border-bottom-color: var(--primary); outline: 0; box-shadow: 0 2px 0 rgba(83,224,118,.14); }
[data-custom-style="paper"] .custom-inline-answer input.form-input { border-bottom-color: #8f795e; color: #26303a; }
[data-custom-style="aurora"] .custom-inline-answer input.form-input { border-bottom-color: rgba(210,195,255,.58); }
[data-custom-style="word_lab"] .custom-inline-answer input.form-input { border-bottom-color: rgba(217,255,114,.58); }

@media (max-width: 1100px) {
    .custom-builder-layout { grid-template-columns: 180px minmax(0, 1fr); }
    .custom-inspector { position: static; grid-column: 1 / -1; max-height: none; }
    .custom-template-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 720px) {
    .custom-builder-header { align-items: flex-start; flex-direction: column; }
    .custom-builder-layout { display: flex; flex-direction: column; }
    .custom-block-palette, .custom-inspector, .custom-canvas-wrap { position: static; width: 100%; max-height: none; }
    .custom-block-palette { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .35rem; }
    .custom-block-palette h2, .custom-block-palette > p { grid-column: 1 / -1; }
    .custom-palette-block { margin: 0; }
    .custom-canvas-toolbar { align-items: flex-start; flex-direction: column; gap: .2rem; }
    .custom-template-heading { align-items: flex-start; flex-direction: column; gap: .35rem; }
    .custom-template-grid { display: flex; margin-right: -1rem; padding-right: 1rem; overflow-x: auto; scroll-snap-type: x mandatory; }
    .custom-template-card { flex: 0 0 min(82vw, 285px); scroll-snap-align: start; }
    .custom-canvas-block, .custom-preview-block, .custom-play-block { grid-column: 1 / -1; grid-row: auto; }
    .custom-canvas-controls .btn-icon:nth-of-type(1), .custom-canvas-controls .btn-icon:nth-of-type(4) { display: none; }
    .custom-quiz-card { align-items: flex-start; flex-direction: column; }
}
@media (hover: none) {
    .custom-canvas-block.is-selected .custom-canvas-chrome { opacity: 1; pointer-events: auto; }
    .custom-canvas-block.is-selected .custom-resize-handle { opacity: 1; }
}
