/* CUBIC Styles */
@import url('https://fonts.googleapis.com/css2?family=Cantarell:wght@400;700&family=Honk:MORF@15&display=swap');

:root {
    --color-primary: #f6d75e;
    --color-primary-dark: #ffd84d;
    --color-secondary: rgba(152, 125, 216, 0.26);
    --color-background: #1a1033;
    --color-card: rgba(207, 195, 245, 0.18);
    --color-text: #f7f2ff;
    --color-text-muted: #bcafbd;
    --color-border: rgba(233, 216, 255, 0.2);
    --color-accent: #b8a1ff;
    --color-error: #d4183d;
    --color-success: #28a745;
    --font-family: 'Jost', sans-serif;
    --font-display: 'Jost', sans-serif;
    --header-size-bump: 0.42rem;
    --radius: 14px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    overflow-x: hidden;
}

body {
    overflow-x: hidden;
    font-family: var(--font-family);
    background-color: #120a26;
    background-image: var(--site-background-image, url('../images/background-options/vercors.jpg'));
    background-position: center center;
    background-repeat: no-repeat;
    background-size: cover;
    background-attachment: fixed;
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
}

h1,
h2,
h3,
.navbar h1,
.module-title h2,
.page-header h2,
.section-header h3 {
    font-family: var(--font-display);
    letter-spacing: 0.02em;
}

h1 {
    font-size: calc(1.5em + var(--header-size-bump));
}

h2 {
    font-size: calc(1.3em + var(--header-size-bump));
}

h3 {
    font-size: calc(1em + var(--header-size-bump));
}

/* Login Page */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.login-card {
    background: var(--color-card);
    border: 2px solid var(--color-border);
    backdrop-filter: blur(8px);
    border-radius: var(--radius);
    padding: 2.5rem;
    width: 100%;
    max-width: 450px;
    box-shadow: 0 20px 44px rgba(6, 1, 20, 0.42);
}

.logo-section {
    text-align: center;
    margin-bottom: 2rem;
}

.logo-icon {
    background: var(--color-accent);
    border-radius: 50%;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
}

.logo-icon svg {
    stroke: #f7faff;
}

.login-card h1 {
    font-size: calc(2rem + var(--header-size-bump));
    margin-bottom: 0.5rem;
}

.login-card p {
    color: var(--color-text-muted);
    margin-bottom: 1rem;
}

.alert {
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
}

.alert-error {
    background-color: #fee;
    color: var(--color-error);
    border: 1px solid var(--color-error);
}

.alert-success {
    background-color: #efe;
    color: var(--color-success);
    border: 1px solid var(--color-success);
}

.login-form {
    margin-top: 1.5rem;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-input {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    font-family: var(--font-family);
    font-size: 1rem;
    background: var(--color-card);
    transition: border-color 0.2s;
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.btn {
    padding: 0.78rem 1.55rem;
    border: none;
    border-radius: calc(var(--radius) + 4px);
    font-family: var(--font-family);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    justify-content: center;
    box-shadow: 0 10px 22px rgba(11, 3, 31, 0.32);
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: #2d1a00;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, #ffe79b 100%);
    transform: translateY(-2px);
    box-shadow: 0 14px 28px rgba(245, 205, 83, 0.34);
}

.btn-outline {
    background: rgba(28, 17, 52, 0.58);
    color: var(--color-text);
    border: 2px solid rgba(233, 216, 255, 0.26);
    backdrop-filter: blur(10px);
    box-shadow: 0 10px 22px rgba(6, 1, 20, 0.22);
}

.btn-outline:hover {
    border-color: rgba(246, 215, 94, 0.55);
    background: rgba(34, 21, 62, 0.74);
    box-shadow: 0 12px 26px rgba(6, 1, 20, 0.28);
}

.btn-danger {
    background: rgba(120, 24, 24, 0.38);
    color: #ffd7d7;
    border: 2px solid rgba(248, 113, 113, 0.45);
    backdrop-filter: blur(10px);
    box-shadow: 0 10px 22px rgba(72, 8, 8, 0.24);
}

@keyframes btn-pulse-aura {
    0%, 100% { box-shadow: 0 0 0 0 rgba(176, 159, 255, 0.75); }
    55%       { box-shadow: 0 0 0 12px rgba(176, 159, 255, 0); }
}
.btn-pulse-aura {
    animation: btn-pulse-aura 2s ease-in-out infinite;
}

.btn-danger:hover {
    border-color: rgba(248, 113, 113, 0.78);
    background: rgba(145, 28, 28, 0.55);
    box-shadow: 0 12px 26px rgba(72, 8, 8, 0.32);
}

.btn-wide {
    min-width: 200px;
}

.btn-secondary {
    background: linear-gradient(135deg, #6e53b6 0%, #8f71d8 100%);
    color: #f8f3ff;
}

.btn-secondary:hover {
    background: linear-gradient(135deg, #7f63c8 0%, #a085e5 100%);
}

.btn.disabled,
.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.form-toggle {
    text-align: center;
    margin-top: 1rem;
}

.form-toggle a {
    color: var(--color-text-muted);
    text-decoration: underline;
    font-size: 0.9rem;
}

.form-toggle a:hover {
    color: var(--color-text);
}

/* Navigation Bar */
.navbar {
    background: rgba(73, 64, 97, 0.82);
    border-bottom: 2px solid var(--color-border);
    padding: 0.7rem 1.5rem;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 8px 28px rgba(7, 1, 23, 0.45);
    backdrop-filter: blur(10px);
}

.navbar-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 4rem;
}

.logo-icon-small {
    background: var(--color-accent);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-icon-small svg {
    stroke: #f7faff;
}

.navbar-display-logo {
    display: block;
    width: auto;
    height: 32px;
    max-width: 180px;
    object-fit: contain;
}

.navbar-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.navbar .btn {
    padding: 0.38rem 0.9rem;
    font-size: 0.9rem;
}

.navbar .btn-icon-only {
    width: 40px;
    height: 40px;
    padding: 0;
}

.navbar .btn-icon-only svg {
    width: 18px;
    height: 18px;
}

.welcome-text {
    color: var(--color-text-muted);
}

.navbar-logo {
    filter: drop-shadow(0 0 10px rgba(12, 12, 12, 0.4));
}

.navbar-back-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    white-space: nowrap;
}

.navbar-back-label {
    display: inline;
}

.welcome-text-mobile {
    display: none;
}

.settings-btn-mobile {
    display: none;
}

/* Main Content */
.main-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

.container {
    width: 100%;
}

.library-frosted-container {
    background: rgba(28, 17, 52, 0.58);
    border: 2px solid rgba(233, 216, 255, 0.28);
    backdrop-filter: blur(10px);
    border-radius: 18px;
    box-shadow: 0 12px 32px rgba(6, 1, 20, 0.24);
    padding: 1rem;
}

.container-narrow {
    max-width: 900px;
    margin: 0 auto;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.stat-tile {
    background: rgba(28, 17, 52, 0.58);
    border-radius: var(--radius);
    padding: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border-left: 4px solid;
    border-top: 1px solid rgba(233, 216, 255, 0.28);
    border-right: 1px solid rgba(233, 216, 255, 0.16);
    border-bottom: 1px solid rgba(233, 216, 255, 0.16);
    backdrop-filter: blur(10px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.15);
    transition: transform 0.2s, box-shadow 0.2s;
}

.stat-tile:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.stat-tile-primary {
    border-left-color: var(--color-primary);
}

.stat-tile-primary .stat-icon {
    background: rgba(255, 212, 59, 0.1);
    color: var(--color-primary);
}

.stat-tile-accent {
    border-left-color: #FF6B6B;
}

.stat-tile-accent .stat-icon {
    background: rgba(255, 107, 107, 0.1);
    color: #FF6B6B;
}

.stat-tile-secondary {
    border-left-color: #4ECDC4;
}

.stat-tile-secondary .stat-icon {
    background: rgba(78, 205, 196, 0.1);
    color: #4ECDC4;
}

.stat-tile-success {
    border-left-color: #95E1D3;
}

.stat-tile-success .stat-icon {
    background: rgba(149, 225, 211, 0.1);
    color: #95E1D3;
}

.stat-icon {
    width: 42px;
    height: 42px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-icon-large {
    width: 62px;
    height: 62px;
}

.stat-icon svg {
    width: 100%;
    height: 100%;
}

.stat-icon-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

.stat-content {
    flex: 1;
}

.stat-value {
    font-size: 1.45rem;
    font-weight: 700;
    margin: 0;
    color: var(--color-text);
}

.stat-label {
    font-size: 1rem;
    color: var(--color-text-muted);
    margin: 0.2rem 0 0 0;
}

/* Daily Welcome & Quiz Styles */
.dashboard-layout {
    display: flex;
    flex-direction: column;
}

.dashboard-layout .welcome-section {
    order: -3;
    margin-bottom: 1.25rem;
}

.dashboard-layout .dashboard-stats-grid {
    order: -2;
    margin-bottom: 1.25rem;
}

.dashboard-layout .dashboard-daily-section {
    order: -1;
}

.dashboard-layout .daily-section-minimized {
    order: -1;
    margin-bottom: 1.25rem;
}

.daily-welcome-section {
    padding: 0;
    margin-bottom: 1.25rem;
}

.daily-section-minimized {
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0.6rem 0.75rem;
    border-radius: calc(var(--radius) - 4px);
    border: 1px dashed rgba(246, 215, 94, 0.45);
    background: rgba(20, 12, 40, 0.36);
    color: var(--color-text-muted);
    font-size: 0.8rem;
}

.daily-tip {
    display: flex;
    gap: 0.65rem;
    margin: 0.85rem 0;
    background: #fff5c9;
    padding: 0.75rem;
    border-radius: calc(var(--radius) - 2px);
    border: 1px solid #e8d37a;
    backdrop-filter: blur(10px);
}

.daily-tip svg {
    flex-shrink: 0;
    color: #8a6400;
}

.daily-tip h4 {
    margin: 0 0 0.25rem 0;
    font-size: 1rem;
    color: #5f4500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    opacity: 1;
}

.daily-tip p {
    margin: 0;
    font-size: 1rem;
    line-height: 1.4;
    color: #2f2200;
}

.daily-quiz-container {
    background: rgba(184, 161, 255, 0.1);
    border-radius: calc(var(--radius) - 2px);
    padding: 0.95rem;
    margin-top: 0.85rem;
    border: 1px solid rgba(246, 215, 94, 0.22);
    backdrop-filter: blur(10px);
    font-size: 1rem;
}

.dashboard-languages-container {
    background: rgba(255, 255, 255, 0.12);
    border-radius: calc(var(--radius) - 2px);
    padding: 0.95rem;
    margin-top: 0.85rem;
    border: 1px solid rgba(246, 215, 94, 0.22);
    backdrop-filter: blur(10px);
}

.dashboard-languages-container .page-header {
    margin-bottom: 1rem;
}

.weekly-leaderboard-card {
    background: rgba(255, 255, 255, 0.12);
    border-radius: calc(var(--radius) - 2px);
    padding: 0.95rem;
    margin-top: 0.85rem;
    border: 1px solid rgba(246, 215, 94, 0.22);
    backdrop-filter: blur(10px);
}

.weekly-leaderboard-card .page-header {
    margin-bottom: 0.65rem;
}

.weekly-leaderboard-empty {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    margin: 0;
}

.weekly-leaderboard-table {
    width: 100%;
    border-collapse: collapse;
    overflow: hidden;
    border-radius: 10px;
}

.weekly-leaderboard-table th,
.weekly-leaderboard-table td {
    text-align: left;
    padding: 0.6rem 0.65rem;
    border-bottom: 1px solid rgba(233, 216, 255, 0.16);
    font-size: 0.95rem;
}

.weekly-leaderboard-table th {
    color: var(--color-text-muted);
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.weekly-leaderboard-table tbody tr:last-child td {
    border-bottom: none;
}

.leaderboard-row-me {
    background: rgba(246, 215, 94, 0.12);
    font-weight: 700;
}

.leaderboard-separator td {
    color: var(--color-text-muted);
    text-align: center;
    letter-spacing: 0.08em;
    border-bottom: 1px dashed rgba(233, 216, 255, 0.24);
}

.quiz-header-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.85rem;
}

.quiz-header-bar h3 {
    margin: 0;
    font-size: calc(0.98rem + var(--header-size-bump));
    color: var(--color-text);
}

.quiz-progress {
    background: rgba(28, 17, 52, 0.85);
    padding: 0.3rem 0.55rem;
    border-radius: calc(var(--radius) - 4px);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-primary);
    border: 1px solid rgba(246, 215, 94, 0.35);
}

.quiz-question {
    animation: fadeIn 0.3s ease-in;
}

.daily-quiz-container .quiz-question-row {
    display: flex;
    align-items: center;
    gap: 0.55rem;
}

.question-text {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-text);
    margin: 0 0 0.85rem 0;
    line-height: 1.4;
}

.daily-quiz-container .question-text {
    flex: 1.1;
    margin: 0;
    line-height: 1.3;
}

.quiz-options {
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
    margin-bottom: 0.85rem;
}

.daily-quiz-container .quiz-options {
    flex: 1.8;
    display: flex;
    flex-direction: row;
    gap: 0.5rem;
    margin: 0;
}

.quiz-option {
    display: flex;
    align-items: flex-start;
    gap: 0.65rem;
    padding: 0.7rem;
    background: rgba(20, 12, 40, 0.48);
    border: 1px solid rgba(184, 161, 255, 0.28);
    border-radius: calc(var(--radius) - 2px);
    cursor: pointer;
    transition: all 0.2s ease;
}

.daily-quiz-container .quiz-option {
    flex: 1;
    min-height: 100%;
}

.quiz-option input[type="radio"] {
    margin-top: 0.15rem;
    cursor: pointer;
    accent-color: var(--color-primary);
    flex-shrink: 0;
}

.quiz-option:hover {
    background: rgba(246, 215, 94, 0.14);
    border-color: rgba(246, 215, 94, 0.6);
    transform: translateX(4px);
}

.quiz-option input[type="radio"]:checked + .option-text {
    font-weight: 600;
}

.option-text {
    font-size: 0.85rem;
    line-height: 1.35;
    color: var(--color-text);
}

.quiz-feedback {
    padding: 0.75rem;
    border-radius: calc(var(--radius) - 2px);
    margin-bottom: 0.85rem;
    font-size: 0.85rem;
    line-height: 1.35;
}

.daily-quiz-container .quiz-feedback {
    margin-top: 0.6rem;
    margin-bottom: 0;
}

.quiz-feedback.correct {
    background: rgba(149, 225, 211, 0.3);
    color: var(--color-text);
    border-left: 4px solid var(--color-primary);
}

.quiz-feedback.incorrect {
    background: rgba(255, 107, 107, 0.2);
    color: var(--color-text);
    border-left: 4px solid #ffb4a8;
}

.quiz-navigation {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
}

.daily-quiz-container .quiz-navigation {
    flex: 0 0 auto;
    margin-left: auto;
    justify-content: flex-end;
}

.quiz-navigation .btn {
    flex: 1;
    max-width: 130px;
    font-size: 0.8rem;
    padding: 0.5rem 0.75rem;
}

.daily-quiz-container .quiz-navigation .btn {
    max-width: 120px;
    flex: 0 0 auto;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.quiz-results {
    display: grid;
    grid-template-columns: minmax(280px, 0.9fr) minmax(0, 1fr);
    column-gap: 0.9rem;
    align-items: start;
    text-align: left;
    animation: fadeIn 0.3s ease-in;
}

.results-header {
    grid-column: 1;
}

.results-header h3 {
    margin: 0 0 0.6rem 0;
    font-size: calc(1.1rem + var(--header-size-bump));
    color: var(--color-text);
}

.score-display {
    display: inline-block;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-primary);
    background: rgba(20, 12, 40, 0.58);
    padding: 0.6rem 0.95rem;
    border-radius: calc(var(--radius) - 2px);
    border: 1px solid rgba(246, 215, 94, 0.4);
}

.results-summary {
    grid-column: 2;
    margin: 0;
    text-align: left;
    font-size: 0.85rem;
    line-height: 1.45;
}

.results-summary .result-item {
    padding: 0.65rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: calc(var(--radius) - 2px);
}

.result-item.correct {
    background: rgba(149, 225, 211, 0.25);
    border-left: 4px solid var(--color-primary);
}

.result-item.incorrect {
    background: rgba(255, 107, 107, 0.2);
    border-left: 4px solid #ffb4a8;
}

.btn-close-quiz {
    grid-column: 1;
    justify-self: start;
    width: fit-content;
    max-width: none;
    margin-top: 0.2rem;
}

.page-header,
.section-header {
    margin-bottom: 1rem;
}

.page-header.text-center,
.text-center {
    text-align: center;
}

.page-header h2,
.section-header h3 {
    margin-bottom: 0.3rem;
}

.page-header-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.text-muted {
    color: var(--color-text-muted);
}

/* Empty State */
.empty-state {
    background: var(--color-card);
    border: 2px dashed var(--color-border);
    backdrop-filter: blur(8px);
    border-radius: var(--radius);
    padding: 4rem 2rem;
    text-align: center;
    max-width: 850px;
    margin: 2rem auto;
}

.empty-state svg {
    stroke: var(--color-text-muted);
    margin-bottom: 1rem;
}

.empty-state h3 {
    margin-bottom: 0.5rem;
}

.empty-state p {
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
}

/* Language Grid */
.language-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.language-card {
    background: rgba(255, 245, 201, 0.82);
    border: 2px solid rgba(232, 211, 122, 0.82);
    backdrop-filter: blur(8px);
    border-radius: var(--radius);
    padding: 1.5rem;
    text-decoration: none;
    color: #2f2200;
    transition: all 0.3s;
    max-width: 900px;
    margin: 0 auto;
}

.language-card:hover {
    border-color: rgba(216, 187, 88, 0.95);
    background: rgba(255, 241, 181, 0.92);
    box-shadow: 0 10px 24px rgba(95, 69, 0, 0.18);
    transform: translateY(-2px);
}

.language-card-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.language-flag {
    font-size: 2.5rem;
}

.language-flag-image {
    width: 60px;
    height: 60px;
    object-fit: cover;
    border-radius: var(--radius);
}

.language-card h3 {
    margin: 0;
}

.language-description {
    color: #5f4500;
    margin-bottom: 1rem;
}

.language-stats {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    color: #5f4500;
}

/* Learning Tips */
.learning-tips-container {
    margin-top: 2.5rem;
}

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

.learning-tip-card {
    background: var(--color-card);
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.25rem;
}

.learning-tip-card h3 {
    margin: 0 0 0.5rem 0;
    font-size: calc(1.05rem + var(--header-size-bump));
}

.learning-tip-card p {
    margin: 0;
    color: var(--color-text-muted);
    line-height: 1.45;
}

/* Language Selection Bubbles */
.language-selection-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.language-bubble {
    position: relative;
}

.language-bubble-btn {
    background: rgba(207, 195, 245, 0.48);
    opacity: 0.95;
    border: 4px solid var(--color-primary);
    border-radius: var(--radius);
    padding: 2rem 1.5rem;
    width: 100%;
    cursor: pointer;
    transition: all 0.3s;
    font-family: var(--font-family);
    text-align: center;
}

.language-bubble-btn:hover:not(:disabled) {
    border-color: var(--color-primary-dark);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
    transform: scale(1.05);
}

.language-bubble.added .language-bubble-btn {
    border-color: var(--color-border);
    background: var(--color-secondary);
    opacity: 0.6;
    cursor: not-allowed;
}

.flag-circle {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: var(--color-secondary);
    border: 4px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
}

.flag-emoji {
    font-size: 3.5rem;
}

.flag-image {
    width: 70px;
    height: 70px;
    object-fit: cover;
    border-radius: var(--radius);
}

.language-bubble h3 {
    font-size: calc(1.5rem + var(--header-size-bump));
    margin-bottom: 0.5rem;
}

.language-bubble p {
    color: #4a1d8a;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.status-text {
    display: block;
    color: var(--color-primary-dark);
    font-weight: 500;
}

.language-bubble.added .status-text {
    color: var(--color-text-muted);
}

/* Module Page */
.module-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    margin-bottom: 1rem;
    background: rgba(28, 17, 52, 0.58);
    border: 2px solid rgba(233, 216, 255, 0.28);
    backdrop-filter: blur(10px);
    border-radius: 18px;
    padding: 1rem;
    box-shadow: 0 12px 32px rgba(6, 1, 20, 0.24);
}

.module-header-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: nowrap;
    gap: 1rem;
    width: 100%;
    position: relative;
}

.module-header-bar p,
.module-header-bar .text-muted,
.module-header-bar small {
    color: var(--color-text-muted);
}

.module-header-bar .btn {
    white-space: nowrap;
    flex-shrink: 0;
}

.module-title {
    display: flex;
    align-items: flex-end;
    flex: 1;
    min-width: 0;
    gap: 1rem;
    margin-right: 1rem;
}


.module-flag {
    font-size: 4rem;
    font-family: 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', sans-serif;
}

.module-flag-image {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: var(--radius);
}

.module-title h2 {
    margin-bottom: 0.25rem;
}

.module-points-tile {
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    min-width: 120px;
    padding: 0.5rem 0.75rem;
    border-radius: 12px;
    border: 1px solid rgba(246, 215, 94, 0.45);
    background: rgba(20, 12, 40, 0.42);
    box-shadow: 0 8px 20px rgba(6, 1, 20, 0.22);
    flex-shrink: 0;
}

.module-points-label {
    font-size: 0.72rem;
    letter-spacing: 0.03em;
    color: var(--color-text-muted);
}

.module-points-value {
    font-size: 1.1rem;
    font-weight: 700;
    line-height: 1.1;
    color: var(--color-primary);
}

.chat-header-bar {
    width: 100%;
    flex: 1 1 100%;
    align-items: flex-start;
}

.chat-header-left {
    flex: 0 0 auto;
}

.chat-header-right {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-left: auto;
    flex: 1 1 auto;
    min-width: 0;
    justify-content: flex-end;
}

.chat-header-right .module-switcher {
    width: auto;
    flex: 1 1 auto;
    min-width: 0;
    margin-top: 0;
}

.chat-header-metrics {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    flex-shrink: 0;
}

.module-back-link {
    display: inline-flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    gap: 0.55rem;
    min-width: 0;
    padding: 0.48rem 0.88rem 0.48rem 0.72rem;
    border-radius: 999px;
    text-decoration: none;
    color: inherit;
    flex-shrink: 0;
    background: rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 2px 8px rgba(6, 1, 20, 0.12);
    transition: transform 0.18s ease, background 0.18s ease, box-shadow 0.18s ease;
}

.module-back-link:hover,
.module-back-link:focus {
    outline: none;
    background: rgba(255, 255, 255, 0.22);
    box-shadow: 0 8px 18px rgba(6, 1, 20, 0.18);
    transform: translateY(-1px);
}

.module-back-link-chevron {
    flex-shrink: 0;
    opacity: 0.75;
}

.module-back-link-flag {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.module-back-link-flag-image {
    width: 46px;
    height: 46px;
    object-fit: cover;
    border-radius: 12px;
    box-shadow: 0 6px 14px rgba(6, 1, 20, 0.16);
}

.module-back-link-flag-emoji {
    font-size: 2.2rem;
    line-height: 1;
}

.module-back-link-caption {
    font-size: 0.95rem;
    line-height: 1.1;
    font-weight: 700;
    letter-spacing: 0.01em;
    color: var(--color-text-muted);
    text-align: left;
    max-width: 12ch;
}

.module-switcher {
    width: 70%;
    display: flex;
    align-items: stretch;
    gap: 0.4rem;
    margin-top: 1rem;
    padding: 0.35rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(233, 216, 255, 0.16);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.module-header-bar .module-switcher {
    position: absolute;
    left: 50%;
    top: 20%;
    transform: translate(-50%, -50%);
    width: min(620px, calc(100% - 18rem));
    margin-top: 0;
    z-index: 4;
}

.module-header-switcher-only {
    align-items: stretch;
}

.module-header-bar-leading {
    justify-content: space-between;
}

.module-header-leading {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex: 1 1 auto;
    min-width: 0;
    flex-wrap: nowrap;
}

.module-header-leading .module-points-tile {
    margin-left: auto;
}

.module-header-switcher-only .module-header-bar {
    justify-content: center;
    min-height: 4.25rem;
}

.module-header-switcher-only .module-switcher {
    position: static;
    left: auto;
    top: auto;
    transform: none;
    width: min(620px, 100%);
    margin-top: 0;
    z-index: 4;
}

.module-header-bar > :not(.module-switcher) {
    position: relative;
    z-index: 2;
}

.module-switcher-item {
    flex: 1 1 0;
    min-width: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.1rem;
    padding: 0.58rem 0.85rem;
    border-radius: 999px;
    text-decoration: none;
    color: var(--color-text-muted);
    transition: transform 0.18s ease, background 0.18s ease, color 0.18s ease, box-shadow 0.18s ease;
}

.module-switcher-item:hover,
.module-switcher-item:focus {
    outline: none;
    transform: translateY(-1px);
    color: #fff;
}

.module-switcher-item.is-active {
    color: #fff;
    background: linear-gradient(135deg, rgba(109, 59, 176, 0.96), rgba(11, 95, 154, 0.92));
    box-shadow: 0 10px 22px rgba(27, 14, 52, 0.28);
}

.module-switcher-label {
    font-size: 0.92rem;
    font-weight: 700;
    line-height: 1;
}

.module-switcher-description {
    font-size: 0.7rem;
    line-height: 1;
    opacity: 0.8;
}

.module-header .module-switcher {
    margin-top: 0.95rem;
}

.chat-sidebar-metrics {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 0 0 1rem;
}

.chat-sidebar-metrics .module-points-tile {
    flex: 1 1 140px;
    min-width: 0;
}

.dossier-header-frosted {
    background: rgba(28, 17, 52, 0.58);
    border: 2px solid rgba(233, 216, 255, 0.28);
    backdrop-filter: blur(10px);
    border-radius: 18px;
    box-shadow: 0 12px 32px rgba(6, 1, 20, 0.24);
}

.list-card[data-dossier-color] {
    --dossier-hue-bg: var(--dossier-color-rgba, rgba(28, 17, 52, 0.58));
    background: var(--dossier-hue-bg);
    border: 2px solid rgba(233, 216, 255, 0.28);
    backdrop-filter: blur(10px);
}

.units-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.unit-card {
    background: var(--color-card);
    border: 2px solid var(--color-border);
    backdrop-filter: blur(8px);
    border-radius: var(--radius);
    padding: 1.5rem;
    color: var(--color-text);
    transition: all 0.3s;
}

.unit-card-link {
    display: block;
    text-decoration: none;
    color: inherit;
}

.unit-card:hover {
    border-color: rgba(246, 215, 94, 0.85);
    box-shadow: 0 10px 24px rgba(7, 1, 22, 0.42);
    transform: translateY(-2px);
}

.unit-card-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.unit-card-header svg {
    stroke: var(--color-primary);
}

.unit-card h4 {
    margin: 0;
}

.unit-card-actions .btn {
    width: auto;
    margin-top: 0.45rem;
    padding: 0.22rem 0.55rem;
    border-radius: 999px;
    font-size: 0.78rem;
    line-height: 1.2;
    font-weight: 600;
    min-height: 0;
}

.unit-description {
    color: var(--color-text-muted);
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.unit-progress {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.unit-status {
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 500;
}

.unit-status.completed {
    background: #d4edda;
    color: #155724;
}

.unit-status.in-progress {
    background: #fff3cd;
    color: #856404;
}

.unit-status.not-started {
    background: #f8f9fa;
    color: var(--color-text-muted);
}

/* Shared list tiles */
.lists-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.list-card {
    background: var(--color-card);
    border: 2px solid var(--color-border);
    backdrop-filter: blur(8px);
    border-radius: var(--radius);
    padding: 0.9rem;
    color: var(--color-text);
    transition: all 0.25s;
}

.list-card:hover {
    border-color: rgba(246, 215, 94, 0.85);
    box-shadow: 0 10px 24px rgba(7, 1, 22, 0.42);
    transform: translateY(-2px);
}

.list-card-link {
    display: block;
    color: inherit;
    text-decoration: none;
}

.list-card-header {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    margin-bottom: 0.5rem;
}

.list-card-header svg {
    stroke: var(--color-primary-dark);
}

.list-card-header h4 {
    margin: 0;
}

.list-description {
    color: var(--color-text-muted);
    margin-bottom: 0.7rem;
    font-size: 0.92rem;
}

.list-progress {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.84rem;
    color: var(--color-text-muted);
}

.list-card-actions {
    margin-top: 0.7rem;
}

.list-mastery-footer {
    margin-top: 0.7rem;
}

.list-mastery-label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    font-size: 0.78rem;
    color: var(--color-text-muted);
    margin-bottom: 0.28rem;
}

.dossier-tile .text-muted,
.dossier-lists-grid .list-card .text-muted,
.dossier-header-frosted .text-muted {
    color: var(--color-text-muted);
}

.list-mastery-bar {
    width: 100%;
    height: 6px;
    background: rgba(148, 163, 184, 0.35);
    border-radius: 999px;
    overflow: hidden;
}

.list-mastery-fill {
    height: 100%;
    background: linear-gradient(90deg, #f6d75e 0%, #c6f48f 100%);
    transition: width 0.25s ease;
}

.list-status {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.18rem 0.6rem;
    border-radius: 999px;
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: none;
    white-space: nowrap;
}

.list-status.completed,
.list-status.review-list {
    background: #d4edda;
    color: #155724;
}

.list-status.in-progress {
    background: #fff3cd;
    color: #856404;
}

.list-status.not-started {
    background: #dbeafe;
    color: #1e3a8a;
    border: 1px solid #93c5fd;
    letter-spacing: 0.01em;
}

.list-status.not-started::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 999px;
    background: currentColor;
    margin-right: 0.35rem;
}

.list-card-actions .btn {
    padding: 0.34rem 0.68rem;
    font-size: 0.76rem;
    min-height: 28px;
    border-radius: 999px;
    box-shadow: none;
    border-width: 1px;
    font-weight: 600;
}

/* Review Card */
.practice-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-bottom: 2rem;
}

.review-card {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-secondary) 100%);
    border: 2px solid #ffffff;
    border-radius: var(--radius);
    padding: 1.3rem;
    text-decoration: none;
    color: var(--color-text);
    display: block;
    transition: all 0.3s;
}

.review-card:hover {
    border-color: #ffffff;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transform: translateY(-2px);
}

.review-card-header {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    margin-bottom: 0.55rem;
}

.review-card-header svg {
    stroke: #ffffff;
}

.review-card h4 {
    margin: 0;
    font-size: 1.28rem;
}

.review-card p {
    color: #fff2b8;
    margin-bottom: 0.65rem;
}

.link-text {
    color: #fff2b8;
    font-weight: 500;
}

.module-page .review-card {
    background: linear-gradient(145deg, #fff8dd 0%, #fff2c4 52%, #ffe8a8 100%);
    border: 2px solid #6b4ea8;
    color: #2f1f55;
    padding: 1rem 1.05rem;
}

.module-page .review-card.practice-card {
    position: relative;
    overflow: hidden;
    background: linear-gradient(145deg, #e8f0fb 0%, #dce7f8 52%, #cddaf4 100%);
    border-color: #3d5da8;
}

.module-page .review-card.practice-card h4 { color: #1a3464; }
.module-page .review-card.practice-card p,
.module-page .review-card.practice-card .link-text { color: #2d5087; }
.module-page .review-card.practice-card .review-card-header svg { stroke: #2d5087; }

.module-page .review-card.practice-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url('../images/mc-review-demo.png');
    background-position: center;
    background-size: contain;
    background-repeat: repeat;
    opacity: 0.22;
    pointer-events: none;
}

.module-page .review-card.practice-card > * {
    position: relative;
    z-index: 1;
}

.module-page .review-card.chat-practice-card {
    position: relative;
    overflow: hidden;
    background: linear-gradient(145deg, rgba(255, 248, 221, 0.9) 0%, rgba(255, 242, 196, 0.86) 52%, rgba(255, 232, 168, 0.88) 100%);
}

.module-page .review-card.chat-practice-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url('../images/chat-demo.png');
    background-position: center;
    background-size: contain;
    background-repeat: repeat-x;
    opacity: 0.22;
    pointer-events: none;
}

.module-page .review-card.chat-practice-card > * {
    position: relative;
    z-index: 1;
}

.module-page .chat-cost-indicator {
    position: absolute;
    top: 0.1rem;
    left: 0.7rem;
    z-index: 2;
    border-radius: 999px;
    border: 1px solid rgba(74, 52, 120, 0.35);
    background: rgba(255, 250, 224, 0.84);
    color: #4b2f7a;
    font-size: 0.72rem;
    font-weight: 700;
    padding: 0.2rem 0.5rem;
    display: inline-block;
    max-width: 250px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.module-page .review-card.chat-practice-card-locked {
    filter: saturate(0.72);
    opacity: 0.72;
    pointer-events: none;
}

.module-page .review-card.chat-practice-card-locked .link-text {
    color: #e6c000;
    animation: yellowGlow 2s ease-in-out infinite;
}

@keyframes yellowGlow {
    0%, 100% { text-shadow: 0 0 5px rgba(255, 220, 40, 0.55), 0 0 10px rgba(255, 200, 0, 0.3); }
    50% { text-shadow: 0 0 9px rgba(255, 230, 50, 1), 0 0 18px rgba(255, 210, 0, 0.65), 0 0 28px rgba(255, 175, 0, 0.35); }
}

.module-page .review-card.matching-card {
    position: relative;
    overflow: hidden;
    background: linear-gradient(145deg, #fef6e8 0%, #fdebd2 52%, #fce0bc 100%);
    border-color: #b06020;
}

.module-page .review-card.matching-card h4 { color: #7b3f00; }
.module-page .review-card.matching-card p,
.module-page .review-card.matching-card .link-text { color: #9e5200; }
.module-page .review-card.matching-card .review-card-header svg { stroke: #9e5200; }

.module-page .review-card.matching-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url('../images/matching-demo.png');
    background-position: center;
    background-size: contain;
    background-repeat: repeat-x;
    opacity: 0.2;
    pointer-events: none;
}

.module-page .review-card.matching-card > * {
    position: relative;
    z-index: 1;
}

.module-page .review-card.write-card {
    position: relative;
    overflow: hidden;
    background: linear-gradient(145deg, #fdeef5 0%, #fbe0ec 52%, #f8d0e2 100%);
    border-color: #a0155a;
}

.module-page .review-card.write-card h4 { color: #6d0e3c; }
.module-page .review-card.write-card p,
.module-page .review-card.write-card .link-text { color: #9e1254; }
.module-page .review-card.write-card .review-card-header svg { stroke: #9e1254; }

.module-page .review-card.write-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url('../images/write-demo.png');
    background-position: center;
    background-size: contain;
    background-repeat: repeat;
    opacity: 0.2;
    pointer-events: none;
}

.module-page .review-card.write-card > * {
    position: relative;
    z-index: 1;
}

.module-page .review-card.collocator-card {
    position: relative;
    overflow: hidden;
    background: linear-gradient(145deg, #e8f5e9 0%, #d8f0db 52%, #c6e8cb 100%);
    border-color: #2e7d32;
}

.module-page .review-card.collocator-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 70% 30%, rgba(56, 142, 60, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.module-page .review-card.collocator-card > * {
    position: relative;
    z-index: 1;
}

.module-page .review-card.collocator-card h4 {
    color: #1b5e20;
}

.module-page .review-card.collocator-card p,
.module-page .review-card.collocator-card .link-text {
    color: #2e7d32;
}

.module-page .review-card.collocator-card .review-card-header svg {
    stroke: #2e7d32;
}

.module-page .review-card:hover {
    border-color: #5f4498;
    box-shadow: 0 8px 18px rgba(69, 44, 117, 0.22);
}

.module-page .review-card-header svg {
    stroke: #4a2f83;
    width: 26px;
    height: 26px;
}

.module-page .review-card h4 {
    color: #2f1f55;
    font-size: 1.1rem;
}

.module-page .review-card p,
.module-page .review-card .link-text {
    color: #4b347f;
    font-size: 0.88rem;
    line-height: 1.35;
}

.module-page .module-landing-tiles {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.module-page .module-landing-tiles .review-card {
    width: 100%;
    max-width: 600px;}

.module-page .review-card-header {
    gap: 0.55rem;
    margin-bottom: 0.4rem;
}

.module-page .review-card p {
    margin-bottom: 0.45rem;
}

.toast-notice {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    margin-bottom: 1rem;
    padding: 0.75rem 0.95rem;
    border-radius: 12px;
    border: 1px solid transparent;
    box-shadow: 0 6px 16px rgba(15, 23, 42, 0.14);
    transition: opacity 0.24s ease, transform 0.24s ease;
}

.toast-notice-success {
    background: linear-gradient(145deg, #eaf9ef 0%, #dbf2e3 100%);
    border-color: #7dc89a;
    color: #14532d;
}

.toast-notice .toast-content {
    font-size: 0.92rem;
    font-weight: 600;
}

.toast-notice .toast-close {
    border: 1px solid rgba(20, 83, 45, 0.35);
    background: rgba(255, 255, 255, 0.62);
    color: inherit;
    border-radius: 999px;
    width: 26px;
    height: 26px;
    cursor: pointer;
    line-height: 1;
    font-size: 1rem;
}

.toast-notice.is-hiding {
    opacity: 0;
    transform: translateY(-6px);
}

/* Unit Learning Page */
.unit-header {
    margin-bottom: 1.8rem;
}

.unit-title-section {
    display: flex;
    align-items: center;
    gap: 0.81rem;
    margin-bottom: 0.81rem;
}

.unit-flag {
    font-size: 2rem;
    font-family: 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', sans-serif;
}

.unit-flag-image {
    width: 50px;
    height: 50px;
    object-fit: cover;
    border-radius: var(--radius);
}

.unit-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1.5rem;
    flex: 1;
}

.unit-info p {
    margin: 0;
    white-space: nowrap;
}

.unit-header h2 {
    margin-bottom: 0.25rem;
    margin: 0;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: rgba(177, 154, 233, 0.26);
    border-radius: 999px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #f6d75e 0%, #ffe48d 100%);
    box-shadow: 0 0 12px rgba(255, 220, 102, 0.6);
    transition: width 0.3s;
}

/* Flashcard */
.flashcard-container {
    margin-bottom: 1.8rem;
    perspective: 1000px;
}

.flashcard {
    position: relative;
    width: 100%;
    min-height: 405px;
    cursor: pointer;
}

.flashcard-inner {
    position: relative;
    width: 100%;
    height: 100%;
    min-height: 405px;
    transition: transform 0.6s;
    transform-style: preserve-3d;
}

.flashcard-front,
.flashcard-back {
    position: absolute;
    width: 100%;
    min-height: 405px;
    backface-visibility: hidden;
    background: var(--color-card);
    border: 4px solid var(--color-primary);
    border-radius: var(--radius);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    overflow-y: auto;
}

.flashcard-back {
    transform: rotateY(180deg);
}

.flashcard-label {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-bottom: 0.5rem;
}

.flashcard-term,
.flashcard-translation {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    text-align: center;
}

.flashcard-translation {
    color: var(--color-primary-dark);
}

.flashcard-notes {
    background: var(--color-secondary);
    border-radius: var(--radius);
    padding: 0.75rem;
    margin-bottom: 1rem;
    max-width: 500px;
}

.flashcard-notes p {
    font-style: italic;
    color: var(--color-text-muted);
    margin: 0;
    font-size: 0.9rem;
}

.flashcard-media {
    display: flex;
    gap: 1rem;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.flashcard-image-placeholder {
    background: var(--color-secondary);
    border: 2px dashed var(--color-border);
    border-radius: var(--radius);
    padding: 1rem;
    text-align: center;
    flex: 1;
    min-width: 150px;
    max-height: 30vh;
    overflow: hidden;
}

.flashcard-image-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius);
}

.flashcard-image-placeholder svg {
    stroke: var(--color-text-muted);
    width: 36px;
    height: 36px;
}

.flashcard-image-placeholder p {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-top: 0.3rem;
    margin: 0;
}

.btn-audio {
    background: rgba(255, 255, 255, 0.12);
    color: #4b2f72;
    border: 1px solid rgba(123, 89, 171, 0.65);
    border-radius: var(--radius);
    padding: 0.6rem 1.2rem;
    font-family: var(--font-family);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s;
    white-space: nowrap;
}

.btn-audio:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
}

.flashcard-hint {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

/* Navigation Controls */
.navigation-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.page-indicator {
    color: var(--color-text-muted);
}

.complete-unit-section {
    text-align: center;
    margin-top: 2rem;
}

/* Review Page */
.review-container {
    max-width: 950px;
    margin: 0 auto;
}

.review-card-large {
    background: var(--color-card);
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    padding: 3rem;
    text-align: center;
}

.review-icon {
    background: var(--color-accent);
    border-radius: 50%;
    width: 120px;
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.review-icon svg {
    stroke: var(--color-primary-dark);
}

.review-card-large h3 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.quiz-placeholder {
    background: var(--color-secondary);
    border: 2px dashed var(--color-border);
    border-radius: var(--radius);
    padding: 3rem 2rem;
    margin: 2rem 0;
}

.quiz-placeholder p {
    color: var(--color-text-muted);
    margin-bottom: 0.5rem;
}

.small-text {
    font-size: 0.9rem;
}

/* Settings Page */
.settings-container {
    max-width: 1000px;
    margin: 0 auto;
}

.settings-header {
    margin-bottom: 1.5rem;
}

.settings-section {
    margin-bottom: 2rem;
}

.settings-section h3 {
    margin-bottom: 0.9rem;
}

.settings-card {
    background: rgba(207, 195, 245, 0.28);
    border: 2px solid rgba(233, 216, 255, 0.24);
    backdrop-filter: blur(10px);
    box-shadow: 0 12px 28px rgba(6, 1, 20, 0.16);
    border-radius: var(--radius);
    padding: 1.25rem;
}

.empty-state {
    background: rgba(207, 195, 245, 0.22);
    border: 1px solid rgba(233, 216, 255, 0.18);
    backdrop-filter: blur(10px);
    box-shadow: 0 10px 24px rgba(6, 1, 20, 0.14);
}

.settings-form {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.settings-future-note {
    margin-top: 1rem;
    padding-top: 0.9rem;
    border-top: 1px dashed var(--color-border);
}

.settings-future-note h4 {
    margin-bottom: 0.25rem;
}

.settings-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 0.9rem;
}

.settings-language-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.language-settings-card h4 {
    margin: 0;
}

.language-settings-header {
    margin-bottom: 0.9rem;
}

.language-settings-title {
    display: flex;
    align-items: center;
    gap: 0.7rem;
}

.language-settings-form {
    gap: 0.25rem;
}

.settings-help-text {
    margin-top: 0.35rem;
    color: var(--color-text-muted);
    font-size: 0.86rem;
}

.settings-chat-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

.settings-danger-btn {
    color: #9f1d1d;
    border-color: rgba(159, 29, 29, 0.4);
}

.settings-danger-btn:hover {
    background: rgba(159, 29, 29, 0.08);
    border-color: rgba(159, 29, 29, 0.7);
    color: #7f1d1d;
}

.chat-avatar-placeholder {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 0.8rem;
}

.chat-avatar-option {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.6rem 0.75rem;
    border: 1px dashed var(--color-border);
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.45);
}

.chat-avatar-option.is-disabled {
    opacity: 0.7;
}

/* Responsive Design */
@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 0.75rem;
    }

    html {
        font-size: 14px;
    }

    body {
        line-height: 1.45;
    }

    .navbar {
        padding: 0.55rem 0.75rem;
    }

    .navbar-container {
        flex-direction: column;
        align-items: stretch;
        gap: 0.55rem;
    }

    .navbar-brand {
        width: 100%;
        justify-content: space-between;
        gap: 0.5rem;
    }

    .navbar-display-logo {
        height: 28px;
        max-width: 150px;
    }

    .navbar-logo {
        height: 30px;
    }

    .navbar .navbar-back-btn {
        padding: 0.42rem 0.65rem;
        gap: 0;
    }

    .navbar .navbar-back-label {
        display: none;
    }

    .welcome-text-desktop {
        display: none;
    }

    .welcome-text-mobile {
        display: inline;
        font-size: 0.85rem;
        white-space: nowrap;
    }

    .settings-btn-mobile {
        display: inline-flex;
        width: 34px;
        height: 34px;
        flex-shrink: 0;
    }

    .settings-btn-desktop {
        display: none;
    }

    .navbar-actions {
        width: 100%;
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 0.4rem;
    }

    .navbar-actions .btn {
        min-width: 0;
        padding: 0.42rem 0.5rem;
        font-size: 0.76rem;
        gap: 0.2rem;
        white-space: nowrap;
    }

    .navbar-actions .btn-wide {
        min-width: 0;
    }

    .navbar-actions .btn:not(.btn-icon-only) svg {
        display: none;
    }

    .navbar .btn-icon-only {
        width: 34px;
        height: 34px;
        justify-self: center;
    }

    .language-grid,
    .language-selection-grid,
    .units-grid {
        grid-template-columns: 1fr;
    }

    .practice-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .main-content {
        padding: 1.25rem 0.85rem;
    }

    .page-header,
    .section-header,
    .module-header {
        margin-bottom: 0.6rem;
    }

    .page-header h2 {
        font-size: calc(1.35rem + var(--header-size-bump));
    }

    .section-header h3 {
        font-size: calc(1.15rem + var(--header-size-bump));
    }

    .btn {
        padding: 0.58rem 1rem;
        font-size: 0.9rem;
    }

    .form-input {
        padding: 0.6rem;
        font-size: 0.92rem;
    }

    .stat-tile,
    .language-card,
    .unit-card,
    .review-card,
    .learning-tip-card,
    .empty-state {
        padding: 0.75rem;
    }

    .stat-value {
        font-size: 1.25rem;
    }

    .stat-icon {
        width: 24px;
        height: 24px;
    }

    .daily-welcome-section {
        padding: 0;
        margin-bottom: 1rem;
    }

    .dashboard-layout .dashboard-stats-grid {
        margin-bottom: 1rem;
    }

    .dashboard-layout .daily-section-minimized {
        margin-bottom: 1rem;
    }

    .daily-tip {
        flex-direction: column;
        gap: 0.35rem;
        padding: 0.65rem;
        margin: 0.75rem 0;
    }

    .daily-tip svg {
        width: 24px;
        height: 24px;
    }

    .daily-tip h4 {
        font-size: 0.78rem;
        margin-bottom: 0.15rem;
    }

    .daily-tip p {
        font-size: 0.82rem;
    }

    .daily-quiz-container {
        padding: 0.75rem;
        margin-top: 0.75rem;
    }

    .weekly-leaderboard-card {
        padding: 0.75rem;
        margin-top: 0.75rem;
    }

    .weekly-leaderboard-table th,
    .weekly-leaderboard-table td {
        padding: 0.48rem 0.5rem;
        font-size: 0.84rem;
    }

    .quiz-header-bar {
        margin-bottom: 0.75rem;
        gap: 0.5rem;
    }

    .quiz-header-bar h3 {
        font-size: calc(0.9rem + var(--header-size-bump));
        margin-bottom: 0;
    }

    .quiz-progress {
        padding: 0.25rem 0.5rem;
        font-size: 0.78rem;
    }

    .question-text {
        font-size: 0.88rem;
        margin-bottom: 0.75rem;
    }

    .daily-quiz-container .quiz-question-row {
        flex-direction: column;
        align-items: stretch;
        gap: 0.5rem;
    }

    .daily-quiz-container .question-text {
        margin: 0;
    }

    .quiz-options {
        gap: 0.5rem;
        margin-bottom: 0.75rem;
    }

    .daily-quiz-container .quiz-options {
        flex-direction: column;
        margin: 0;
    }

    .quiz-option {
        padding: 0.65rem;
        gap: 0.5rem;
    }

    .option-text {
        font-size: 0.8rem;
    }

    .quiz-feedback {
        padding: 0.65rem;
        font-size: 0.8rem;
        margin-bottom: 0.75rem;
    }

    .quiz-navigation {
        gap: 0.5rem;
        flex-wrap: wrap;
    }

    .daily-quiz-container .quiz-navigation {
        margin-left: 0;
        justify-content: flex-start;
    }

    .quiz-navigation .btn {
        flex: 1;
        min-width: 105px;
        font-size: 0.78rem;
        padding: 0.42rem 0.6rem;
    }

    .daily-quiz-container .quiz-navigation .btn {
        flex: 1;
        max-width: none;
    }

    .results-header h3 {
        font-size: calc(1rem + var(--header-size-bump));
        margin-bottom: 0.55rem;
    }

    .quiz-results {
        grid-template-columns: 1fr;
        row-gap: 0.65rem;
    }

    .results-header,
    .results-summary,
    .btn-close-quiz {
        grid-column: 1;
    }

    .btn-close-quiz {
        justify-self: stretch;
        width: 100%;
    }

    .score-display {
        font-size: 1.45rem;
        padding: 0.6rem 0.85rem;
    }

    .results-summary {
        font-size: 0.8rem;
    }

    .result-item {
        padding: 0.6rem;
        margin-bottom: 0.45rem;
    }

    .module-flag {
        font-size: 3.2rem;
    }

    .module-flag-image {
        width: 64px;
        height: 64px;
    }

    .review-card h4 {
        font-size: 1.2rem;
    }

    .flashcard-term,
    .flashcard-translation {
        font-size: 1.75rem;
    }

    .navigation-controls {
        flex-wrap: wrap;
    }

    .page-header-actions {
        flex-direction: column;
        align-items: flex-start;
    }

    .settings-section-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .settings-chat-grid {
        grid-template-columns: 1fr;
    }

}

@media (max-width: 640px) {
    html {
        font-size: 13px;
    }

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

    .module-header-bar {
        flex-direction: column;
        align-items: stretch;
    }

    .module-header-bar .module-switcher {
        position: static;
        left: auto;
        top: auto;
        transform: none;
        width: 100%;
        margin-top: 0.35rem;
    }

    .module-header-leading {
        width: 100%;
        flex-wrap: nowrap;
        gap: 0.45rem;
    }

    .module-back-link {
        padding: 0.32rem 0.5rem;
    }

    .module-back-link-flag-image {
        width: 38px;
        height: 38px;
    }

    .module-back-link-flag-emoji {
        font-size: 1.95rem;
    }

    .module-back-link-caption {
        font-size: 0.8rem;
    }

    .module-switcher {
        gap: 0.3rem;
        padding: 0.28rem;
    }

    .module-switcher-item {
        padding: 0.5rem 0.55rem;
    }

    .module-switcher-label {
        font-size: 0.82rem;
    }

    .module-switcher-description {
        font-size: 0.64rem;
    }

    .chat-header-bar {
        align-items: flex-start;
    }

    .chat-sidebar-metrics {
        width: 100%;
    }

    .main-content {
        padding: 1rem 0.7rem;
    }
}

/* Quiz Styles */
#quiz-container {
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
}

.quiz-setup {
    background: var(--color-card);
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    padding: 3rem;
    text-align: center;
}

.quiz-icon {
    color: var(--color-primary);
    margin-bottom: 1.5rem;
    display: flex;
    justify-content: center;
}

.quiz-setup h3 {
    font-size: calc(2rem + var(--header-size-bump));
    margin-bottom: 0.5rem;
    color: var(--color-text);
}

.quiz-setup > p {
    color: var(--color-text-muted);
    margin-bottom: 2rem;
    font-size: 1.2rem;
}

.round-selection {
    margin-top: 2rem;
}

.round-label {
    font-size: 1.2rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
    color: var(--color-text);
}

.round-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.btn-round {
    background: var(--color-card);
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.5rem 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.btn-round:hover {
    background: var(--color-accent);
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

.btn-round.is-active {
    background: rgba(246, 215, 94, 0.2);
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px rgba(246, 215, 94, 0.26);
}

.round-number {
    font-size: 2.7rem;
    font-weight: 700;
    color: var(--color-primary);
}

.round-text {
    font-size: 1.2rem;
    color: var(--color-text-muted);
}

.mode-selection {
    margin-top: 1.25rem;
}

.mode-buttons {
    margin-bottom: 1.35rem;
}

.write-container .round-buttons.mode-buttons {
    grid-template-columns: 1fr;
    gap: 0.65rem;
    margin-bottom: 1rem;
}

.write-container .btn-round.btn-mode {
    aspect-ratio: auto;
    min-height: 82px;
    align-items: flex-start;
    text-align: left;
    padding: 0.7rem 0.8rem;
    gap: 0.25rem;
}

.btn-mode {
    align-items: flex-start;
    text-align: left;
    min-height: 94px;
    padding: 1rem 1rem 0.85rem;
}

.btn-mode .mode-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-text);
}

.btn-mode .mode-description {
    font-size: 1.2rem;
    line-height: 1.35;
}

.activity-compact > .container > .module-header {
    margin-top: 0.5rem;
}

.setup-actions {
    margin-top: 1rem;
}

.quiz-info {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

.quiz-info svg {
    color: var(--color-primary);
}

/* Quiz Question */
.quiz-question {
    background: var(--color-card);
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    padding: 2rem;
    width: 100%;
}

.quiz-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--color-border);
}

.quiz-progress {
    font-weight: 600;
    color: var(--color-text);
    font-size: 1.1rem;
}

.quiz-timer {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--color-secondary);
    border-radius: 20px;
    font-weight: 600;
    color: var(--color-text);
}

.quiz-timer svg {
    color: var(--color-primary);
}

.quiz-timer.timer-warning {
    background: #ffe0e0;
    animation: pulse 0.5s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.question-image {
    margin: 1.5rem 0;
    text-align: center;
}

.question-image img {
    max-width: 100%;
    max-height: 300px;
    border-radius: var(--radius);
    border: 2px solid var(--color-border);
}

.question-audio {
    margin: 1.5rem 0;
    text-align: center;
}

.question-audio-controls {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.65rem;
}

.btn-audio {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(123, 89, 171, 0.65);
    border-radius: var(--radius);
    color: #4b2f72;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-audio:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* Keep yellow playback buttons in write + multiple-choice game modes */
.write-container .btn-audio,
.review-container .btn-audio,
.review-compact .btn-audio {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: #4b2f72;
    border: 1px solid rgba(123, 89, 171, 0.65);
    box-shadow: 0 10px 20px rgba(245, 205, 83, 0.28);
}

.write-container .btn-audio svg,
.review-container .btn-audio svg,
.review-compact .btn-audio svg {
    stroke: #4b2f72;
}

.write-container .btn-audio:hover:not(:disabled),
.review-container .btn-audio:hover:not(:disabled),
.review-compact .btn-audio:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, #ffe79b 100%);
    border-color: rgba(123, 89, 171, 0.75);
}

.btn-audio:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-audio-mute {
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(123, 89, 171, 0.65);
    color: #4b2f72;
}

.btn-audio-mute:hover {
    background: rgba(255, 255, 255, 0.2);
}

.btn-audio-mute.is-muted {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(123, 89, 171, 0.65);
    color: #4b2f72;
}

.btn-audio-mute.is-muted:hover {
    background: rgba(255, 255, 255, 0.2);
}

.btn-audio-toggle {
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(123, 89, 171, 0.65);
    color: #4b2f72;
}

.btn-audio-toggle:hover {
    background: rgba(255, 255, 255, 0.2);
}

.question-term.is-hidden {
    color: transparent;
    text-shadow: none;
    background: transparent;
    border: 0;
    border-radius: 0;
    padding: 0;
    margin: 0;
    min-height: 0;
    display: inline-block;
    line-height: 1.15;
    user-select: none;
    position: relative;
}

.question-term.is-hidden::after {
    content: '';
    text-shadow: none;
    position: absolute;
    inset: -0.15rem -0.45rem;
    background: rgba(18, 10, 38, 0.97);
    border: 1px solid rgba(233, 216, 255, 0.24);
    border-radius: 999px;
    box-shadow: 0 10px 24px rgba(6, 1, 20, 0.28);
    pointer-events: none;
    z-index: 1;
}

.question-prompt {
    text-align: center;
    margin: 2rem 0;
}

.question-prompt h3 {
    font-size: calc(1.3rem + var(--header-size-bump));
    color: var(--color-text-muted);
    margin-bottom: 1rem;
    font-weight: 500;
}

.question-term {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-text);
    margin: 1rem 0;
}

.quiz-options {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    margin: 2rem 0;
}

.quiz-option {
    background: var(--color-card);
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.25rem 1.5rem;
    font-size: 1.1rem;
    text-align: left;
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--color-text);
}

.quiz-option:hover:not(:disabled) {
    background: var(--color-accent);
    border-color: var(--color-primary);
    transform: translateX(5px);
}

.quiz-option:disabled {
    cursor: not-allowed;
}

.quiz-option.correct {
    background: #d4edda;
    border-color: #28a745;
    color: #155724;
    font-weight: 600;
}

.quiz-option.incorrect {
    background: #f8d7da;
    border-color: #dc3545;
    color: #721c24;
}

/* Type-in Question */
.type-in-container {
    margin: 2rem 0;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: center;
}

.type-in-input {
    width: 100%;
    max-width: 500px;
    padding: 1rem 1.5rem;
    font-size: 1.2rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-card);
    color: var(--color-text);
    text-align: center;
    transition: all 0.3s ease;
}

.type-in-input:focus {
    outline: none;
    border-color: var(--color-primary);
    background: var(--color-secondary);
}

.type-in-input.correct {
    background: #d4edda;
    border-color: #28a745;
    color: #155724;
}

.type-in-input.incorrect,
.type-in-input.timeout {
    background: #f8d7da;
    border-color: #dc3545;
    color: #721c24;
}

.btn-submit {
    padding: 0.75rem 2rem;
    font-size: 1.1rem;
    font-weight: 600;
}

.special-char-panel {
    width: 100%;
    max-width: 500px;
    margin-top: -0.25rem;
}

.special-char-label {
    margin-bottom: 0.6rem;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-align: center;
}

.special-char-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}

.special-char-button {
    min-width: 32px;
    height: 32px;
    padding: 0 0.5rem;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    background: var(--color-card);
    color: var(--color-text);
    font-size: 0.75rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease;
}

.special-char-button:hover:not(:disabled) {
    border-color: var(--color-primary);
    background: var(--color-secondary);
    transform: translateY(-1px);
}

.special-char-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.correct-answer-display {
    margin-top: 1rem;
    padding: 1rem;
    background: #d4edda;
    border: 2px solid #28a745;
    border-radius: var(--radius);
    color: #155724;
    font-size: 1.1rem;
}

.correct-answer-display strong {
    color: #155724;
    font-weight: 700;
}

.fill-blank {
    display: inline-block;
    color: var(--color-text-muted);
    letter-spacing: 0.08em;
    margin: 0 0.1em;
}

.collocator-sentence {
    font-size: 1.45rem;
    line-height: 1.55;
    font-style: italic;
    margin: 0.5rem 0 1rem;
}

.collocator-hint {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    margin-bottom: 0.5rem;
    padding: 0.45rem 0.75rem;
    background: var(--color-background-secondary);
    border-left: 3px solid var(--color-border-secondary);
    border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
}

.collocator-hint-label {
    font-weight: 600;
    color: rgba(255, 214, 51, 0.9);
    margin-right: 0.35em;
}

/* ── Collocator drag-and-drop game ─────────────────────────────── */

.collocator-instruction {
    margin: 0 0 1.1rem;
    font-size: 0.88rem;
    color: var(--color-text-muted);
    text-align: center;
    letter-spacing: 0.01em;
}

/* Drop zone inline in the sentence */
.drop-zone {
    display: inline-block;
    min-width: 90px;
    padding: 0.1em 0.6em;
    margin: 0 0.15em;
    border-radius: 6px;
    border: 2px dashed var(--color-border);
    background: var(--color-background-secondary);
    color: var(--color-text-muted);
    font-style: normal;
    font-size: 0.9em;
    vertical-align: middle;
    cursor: pointer;
    transition: border-color 0.18s ease, background 0.18s ease, box-shadow 0.18s ease;
    user-select: none;
}

.drop-zone.awaiting-drop {
    border-color: var(--color-primary);
    background: var(--color-secondary);
    box-shadow: 0 0 0 3px rgba(75, 59, 116, 0.12);
}

.drop-zone.drag-over {
    border-color: var(--color-primary);
    background: var(--color-secondary);
    box-shadow: 0 0 0 4px rgba(75, 59, 116, 0.2);
    transform: scale(1.04);
}

.drop-zone.is-correct {
    border-style: solid;
    border-color: #16a34a;
    background: #dcfce7;
    color: #14532d;
    font-weight: 700;
    cursor: default;
}

.drop-zone.is-incorrect {
    border-style: solid;
    border-color: #dc2626;
    background: #fee2e2;
    color: #7f1d1d;
    animation: dnd-shake 0.4s ease;
    cursor: default;
}

.drop-zone.is-timeout {
    border-style: solid;
    border-color: #d97706;
    background: #fef3c7;
    color: #78350f;
    font-weight: 700;
    cursor: default;
}

.drop-zone-placeholder {
    opacity: 0.55;
    letter-spacing: 0.12em;
    font-style: italic;
}

.drop-zone-word {
    font-weight: 700;
    font-style: normal;
}

/* Standalone drop zone shown below sentence when word isn't found in text */
.collocator-standalone-drop {
    margin: 0.5rem 0 0.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
    color: var(--color-text-muted);
}

.collocator-standalone-drop .drop-zone {
    font-size: 1rem;
}

/* Answer chips */
.collocator-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem;
    justify-content: center;
    margin: 0.5rem 0 0.25rem;
}

.collocation-chip {
    padding: 0.55rem 1.2rem;
    border-radius: 999px;
    border: 2px solid var(--color-border);
    background: var(--color-card);
    color: var(--color-text);
    font-size: 1.05rem;
    font-weight: 600;
    cursor: grab;
    transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease, background 0.15s ease, opacity 0.15s ease;
    user-select: none;
    touch-action: none;
}

.collocation-chip:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.12);
    border-color: var(--color-primary);
}

.collocation-chip.is-selected {
    border-color: var(--color-primary);
    background: var(--color-secondary);
    box-shadow: 0 0 0 3px rgba(75, 59, 116, 0.18);
    transform: translateY(-2px);
}

.collocation-chip.is-dragging {
    opacity: 0.45;
    cursor: grabbing;
}

.collocation-chip.is-correct {
    border-color: #16a34a;
    background: #dcfce7;
    color: #14532d;
    cursor: default;
}

.collocation-chip.is-wrong {
    border-color: #dc2626;
    background: #fee2e2;
    color: #7f1d1d;
    opacity: 0.55;
    cursor: not-allowed;
    text-decoration: line-through;
}

.collocation-chip:disabled {
    cursor: not-allowed;
}

@keyframes dnd-shake {
    0%, 100% { transform: translateX(0); }
    20%       { transform: translateX(-5px); }
    40%       { transform: translateX(5px); }
    60%       { transform: translateX(-4px); }
    80%       { transform: translateX(4px); }
}

/* Mode selector (setup screen) */
.mode-selection {
    margin-bottom: 0.75rem;
    text-align: left;
}

.mode-selection > label {
    display: block;
    margin-bottom: 0.35rem;
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: rgba(244, 242, 255, 0.6);
}

.mode-buttons {
    display: flex;
    gap: 0.55rem;
}

.btn-mode {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 0;
    gap: 0.2rem;
    padding: 0.5rem 0.7rem;
    border-radius: 12px;
    border: 2px solid var(--color-border);
    background: var(--color-card);
    color: var(--color-text);
    font-family: inherit;
    cursor: pointer;
    text-align: center;
    transition: border-color 0.18s ease, background 0.18s ease;
}

.btn-mode:hover {
    border-color: var(--color-primary);
}

.btn-mode.is-active {
    border-color: rgba(246, 215, 94, 0.9);
    background: rgba(246, 215, 94, 0.08);
}

.btn-mode-title {
    font-size: 0.92rem;
    font-weight: 600;
}

.btn-mode-desc {
    font-size: 0.78rem;
    color: var(--color-text-muted);
    line-height: 1.3;
}

/* Unscramble mode */
.fill-blank-phrase {
    display: inline-block;
    padding: 0 0.25em;
    color: var(--color-text-muted);
    font-style: italic;
}

.unscramble-answer-slots {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
    min-height: 2.8rem;
    padding: 0.6rem 0.75rem;
    border-radius: 12px;
    border: 2px dashed var(--color-border);
    background: var(--color-background-secondary);
    margin: 0.5rem 0;
    transition: border-color 0.2s ease, background 0.2s ease;
}

.unscramble-answer-slots.is-correct {
    border-style: solid;
    border-color: #16a34a;
    background: rgba(22, 163, 74, 0.08);
}

.unscramble-answer-slots.is-incorrect {
    border-style: solid;
    border-color: #dc2626;
    background: rgba(220, 38, 38, 0.06);
    animation: dnd-shake 0.45s ease;
}

.unscramble-answer-slots.is-timeout {
    border-style: solid;
    border-color: var(--color-text-muted);
}

.answer-slot {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.35rem 0.8rem;
    border-radius: 999px;
    font-size: 1rem;
    font-weight: 600;
    transition: background 0.15s ease, border-color 0.15s ease;
}

.answer-slot.is-empty {
    min-width: 3.5rem;
    min-height: 2rem;
    border: 2px dashed rgba(255, 255, 255, 0.22);
    background: rgba(255, 255, 255, 0.04);
}

.answer-slot.is-filled {
    border: 2px solid var(--color-primary);
    background: var(--color-secondary);
    color: var(--color-text);
    cursor: pointer;
}

.answer-slot.is-filled:hover {
    border-color: #dc2626;
    background: rgba(220, 38, 38, 0.12);
}

.answer-slot.is-correct-reveal {
    border: 2px solid #16a34a;
    background: rgba(22, 163, 74, 0.12);
    color: var(--color-text);
    cursor: default;
}

.collocation-chip.is-used {
    opacity: 0.22;
    cursor: not-allowed;
    transform: none;
}

@media (max-width: 768px) {
    .collocator-dnd-question .quiz-header {
        flex-direction: row;
        align-items: center;
        flex-wrap: nowrap;
        gap: 0.5rem;
    }

    .collocator-dnd-question .quiz-progress {
        font-size: 0.82rem;
        min-width: 0;
        flex-shrink: 1;
    }

    .collocator-dnd-question .quiz-timer {
        flex-shrink: 0;
    }
}

/* ── end Collocator drag-and-drop ──────────────────────────────── */

.quiz-score {
    text-align: center;
    font-size: 1.2rem;
    font-weight: 600;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 2px solid var(--color-border);
    color: var(--color-text);
}

.timeout-message {
    color: var(--color-error);
    font-weight: 700;
}

/* Quiz Results */
.quiz-results {
    background: var(--color-card);
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    padding: 3rem;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    max-width: 600px;
    margin: 0 auto;
}

.results-emoji {
    font-size: 5rem;
    margin-bottom: 1rem;
}

.result-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 120px;
    height: 120px;
    background: rgba(40, 167, 69, 0.2);
    border-radius: 50%;
    margin: 0 auto 2rem;
}

.result-icon svg {
    color: var(--color-success);
    width: 80px;
    height: 80px;
}

.quiz-results h2 {
    font-size: calc(2.5rem + var(--header-size-bump));
    margin-bottom: 2rem;
    color: var(--color-text);
}

.results-score {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    margin: 2rem 0;
}

.score-circle {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    background: var(--color-primary);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border: 4px solid var(--color-primary-dark);
}

.score-number {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--color-text);
    line-height: 1;
}

.score-total {
    font-size: 1.5rem;
    color: var(--color-text);
}

.score-percentage {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
}

.write-results-hero {
    margin: 1.35rem 0 0.6rem;
}

.write-results-hero-image {
    width: 170px;
    height: auto;
    max-width: 100%;
    display: block;
    margin: 0 auto;
}

@media (max-width: 768px) {
    .write-results-hero-image {
        width: 85px;
    }
}

.results-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin: 2rem 0;
    padding: 2rem;
    background: var(--color-secondary);
    border-radius: var(--radius);
    width: 100%;
}

.stat {
    text-align: center;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.results-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
    flex-wrap: wrap;
}

.results-actions .btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

/* Quiz Error */
.quiz-error {
    background: var(--color-card);
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    padding: 3rem;
    text-align: center;
}

/* Compact Matching / Write Mode */
.activity-compact .game-container,
.activity-compact .review-container {
    padding: 1.25rem 0;
}

.activity-compact .game-setup,
.activity-compact .quiz-setup,
.activity-compact .game-question,
.activity-compact .quiz-question,
.activity-compact .game-results,
.activity-compact .quiz-results,
.activity-compact .game-error,
.activity-compact .quiz-error {
    max-width: 1050px;
    margin: 0 auto;
}

.activity-compact .game-setup,
.activity-compact .quiz-setup {
    padding: 2.2rem;
    background: rgba(28, 17, 52, 0.58);
    border: 2px solid rgba(233, 216, 255, 0.28);
    backdrop-filter: blur(10px);
    border-radius: 18px;
    box-shadow: 0 12px 32px rgba(6, 1, 20, 0.24);
}

.activity-compact .game-icon,
.activity-compact .quiz-icon {
    width: 84px;
    height: 84px;
    margin-bottom: 1.1rem;
}

.activity-compact .game-icon svg,
.activity-compact .quiz-icon svg {
    width: 48px;
    height: 48px;
}

.activity-compact .game-setup h3,
.activity-compact .quiz-setup h3 {
    font-size: calc(1.6rem + var(--header-size-bump));
}

.activity-compact .game-setup > p,
.activity-compact .quiz-info,
.activity-compact .round-label {
    font-size: 0.98rem;
}

.activity-compact .game-info {
    padding: 1.05rem;
    margin-bottom: 1.4rem;
    gap: 0.75rem;
}

.activity-compact .info-item {
    gap: 0.5rem;
    font-size: 0.9rem;
}

.activity-compact .round-selection {
    margin-top: 1.25rem;
}

.activity-compact .round-buttons {
    gap: 0.75rem;
    margin-bottom: 1.4rem;
    grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
}

.activity-compact .btn-round {
    padding: 1rem 0.85rem;
    gap: 0.3rem;
}

.activity-compact .round-number {
    font-size: 2rem;
}

.activity-compact .round-text {
    font-size: 0.82rem;
}

.activity-compact .game-info .info-item svg,
.activity-compact .quiz-info svg {
    width: 16px;
    height: 16px;
}

.activity-compact .game-setup > button,
.activity-compact .quiz-setup > button,
.activity-compact .game-setup .btn,
.activity-compact .quiz-setup .btn {
    padding: 0.7rem 1.15rem;
    font-size: 1rem;
}

.activity-compact .game-question,
.activity-compact .quiz-question {
    padding: 1.6rem;
    background: rgba(28, 17, 52, 0.58);
    border: 2px solid rgba(233, 216, 255, 0.28);
    backdrop-filter: blur(10px);
    border-radius: 18px;
    box-shadow: 0 12px 32px rgba(6, 1, 20, 0.24);
}

.activity-compact .game-header,
.activity-compact .quiz-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.4rem;
    padding-bottom: 0.8rem;
    width: 100%;
}

.activity-compact .game-progress,
.activity-compact .quiz-progress,
.activity-compact .game-timer,
.activity-compact .quiz-timer {
    font-size: 1rem;
}

.activity-compact .game-board,
.activity-compact .matching-board {
    gap: 0.75rem;
}

.activity-compact .term-tile,
.activity-compact .definition-tile {
    padding: 0.8rem 0.9rem;
    font-size: 0.92rem;
}

.activity-compact .question-image {
    margin: 1rem 0;
}

.activity-compact .question-image img {
    max-height: 220px;
}

.activity-compact .question-prompt {
    margin: 1.25rem 0;
}

.activity-compact .question-prompt h3 {
    font-size: calc(1.05rem + var(--header-size-bump));
}

.activity-compact .question-term {
    font-size: 2rem;
    margin: 0.75rem 0;
}

.activity-compact .quiz-options {
    gap: 0.75rem;
    margin: 1.4rem 0;
}

.activity-compact .quiz-option {
    padding: 0.95rem 1.1rem;
    font-size: 0.98rem;
}

.activity-compact .type-in-container {
    margin: 1.4rem 0;
    gap: 0.8rem;
}

.activity-compact .type-in-input {
    max-width: 420px;
    padding: 0.8rem 1rem;
    font-size: 1rem;
}

.activity-compact .btn-submit {
    padding: 0.6rem 1.4rem;
    font-size: 0.98rem;
}

.activity-compact .special-char-panel {
    max-width: 420px;
    margin-top: -0.1rem;
}

.activity-compact .special-char-button {
    min-width: 28px;
    height: 28px;
    font-size: 0.7rem;
}

.activity-compact .correct-answer-display {
    padding: 0.75rem;
    font-size: 0.95rem;
}

.activity-compact .game-results,
.activity-compact .quiz-results {
    background: rgba(28, 17, 52, 0.58);
    border: 2px solid rgba(233, 216, 255, 0.28);
    backdrop-filter: blur(10px);
    border-radius: 18px;
    box-shadow: 0 12px 32px rgba(6, 1, 20, 0.24);
    padding: 2.2rem;
}

.activity-compact .quiz-score,
.activity-compact .game-score {
    margin-top: 1.25rem;
    padding-top: 1rem;
    font-size: 1rem;
}

@media (max-width: 768px) {
    .activity-compact .game-setup,
    .activity-compact .quiz-setup,
    .activity-compact .game-question,
    .activity-compact .quiz-question,
    .activity-compact .game-results,
    .activity-compact .quiz-results,
    .activity-compact .game-error,
    .activity-compact .quiz-error {
        padding: 0.5rem;
    }

    .activity-compact .game-setup,
    .activity-compact .quiz-setup,
    .activity-compact .game-question,
    .activity-compact .quiz-question,
    .activity-compact .game-results,
    .activity-compact .quiz-results {
        background: rgba(28, 17, 52, 0.58);
        border: 1px solid rgba(233, 216, 255, 0.22);
        backdrop-filter: blur(8px);
    }

    .activity-compact .game-setup h3,
    .activity-compact .quiz-setup h3 {
        font-size: calc(1.35rem + var(--header-size-bump));
    }

    .activity-compact .game-icon,
    .activity-compact .quiz-icon {
        width: 68px;
        height: 68px;
        margin-bottom: 0.8rem;
    }

    .activity-compact .game-icon svg,
    .activity-compact .quiz-icon svg {
        width: 38px;
        height: 38px;
    }

    .activity-compact .round-buttons {
        grid-template-columns: 1fr;
        gap: 0.6rem;
        margin-bottom: 1rem;
    }

    .activity-compact .btn-round {
        padding: 0.75rem 0.7rem;
    }

    .activity-compact .round-number {
        font-size: 1.75rem;
    }

    .activity-compact .round-text {
        font-size: 0.8rem;
    }

    .activity-compact .game-info {
        padding: 0.85rem;
        margin-bottom: 1rem;
    }

    .activity-compact .info-item {
        font-size: 0.82rem;
    }

    .activity-compact .game-setup > p,
    .activity-compact .quiz-info,
    .activity-compact .round-label {
        font-size: 0.88rem;
    }

    .activity-compact .question-term {
        font-size: 1.45rem;
    }

    .activity-compact .question-image img {
        max-height: 180px;
    }

    .activity-compact .quiz-option,
    .activity-compact .term-tile,
    .activity-compact .definition-tile {
        padding: 0.72rem 0.8rem;
        font-size: 0.9rem;
    }

    .activity-compact .btn-audio,
    .activity-compact .game-setup .btn,
    .activity-compact .quiz-setup .btn {
        padding: 0.55rem 0.9rem;
        font-size: 0.85rem;
    }

    .activity-compact .type-in-input {
        padding: 0.7rem 0.85rem;
        font-size: 0.92rem;
    }

    .activity-compact .btn-submit {
        padding: 0.5rem 1.1rem;
        font-size: 0.9rem;
    }

    .activity-compact .quiz-score,
    .activity-compact .game-score {
        font-size: 0.92rem;
    }

    .activity-compact > .container {
        display: flex;
        flex-direction: column;
    }

    .activity-compact > .container > .game-container,
    .activity-compact > .container > .review-container,
    .activity-compact > .container > .chat-layout {
        order: 1;
    }

    .activity-compact > .container > .module-header {
        order: 2;
        margin-top: 1rem;
    }

    .write-container .quiz-setup {
        width: 100%;
        max-width: 100%;
        padding: 0.9rem;
    }

    .write-container .quiz-icon {
        width: 56px;
        height: 56px;
        margin-bottom: 0.65rem;
    }

    .write-container .quiz-icon svg {
        width: 30px;
        height: 30px;
    }

    .write-container .quiz-setup h3 {
        font-size: calc(1.1rem + var(--header-size-bump));
        margin-bottom: 0.35rem;
    }

    .write-container .quiz-setup > .text-muted,
    .write-container .quiz-info {
        font-size: 0.84rem;
    }

    .write-container .round-selection {
        margin-top: 0.95rem;
    }

    .write-container .round-buttons {
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 0.55rem;
        margin-bottom: 0.8rem;
    }

    .write-container .round-buttons.mode-buttons {
        grid-template-columns: 1fr;
    }

    .write-container .btn-round {
        padding: 0.44rem 0.32rem;
        gap: 0.18rem;
        border-radius: 10px;
        min-height: 74px;
        aspect-ratio: 1 / 1;
        width: 100%;
        justify-content: center;
    }

    .write-container .btn-round.btn-mode {
        aspect-ratio: auto;
        min-height: 72px;
        justify-content: flex-start;
        align-items: flex-start;
        text-align: left;
        padding: 0.5rem 0.58rem;
    }

    .write-container .btn-mode .mode-title {
        font-size: 0.92rem;
    }

    .write-container .btn-mode .mode-description {
        font-size: 0.78rem;
        line-height: 1.2;
    }

    .write-container .round-number {
        font-size: 1.5rem;
    }

    .write-container .round-text {
        font-size: 0.78rem;
    }

    .write-container .setup-actions {
        margin-top: 0.85rem;
    }

    .write-container .setup-actions .btn {
        width: 100%;
        padding: 0.65rem 1rem;
        font-size: 0.9rem;
    }

    .write-container .quiz-results {
        width: 90vw;
        max-width: 90vw;
    }
}

.quiz-error svg {
    color: var(--color-error);
    margin-bottom: 1rem;
}

.quiz-error h3 {
    font-size: calc(2rem + var(--header-size-bump));
    margin-bottom: 1rem;
    color: var(--color-text);
}

.quiz-error p {
    color: var(--color-text-muted);
    margin-bottom: 2rem;
}

/* Compact Review Mode */
.review-compact .review-container {
    padding: 0.25rem 0;
}

.review-compact .quiz-setup,
.review-compact .quiz-question,
.review-compact .quiz-results,
.review-compact .quiz-error {
    max-width: 860px;
    margin: 0 auto;
    padding: 1.1rem;
}

.review-compact .quiz-setup h3,
.review-compact .quiz-results h2,
.review-compact .quiz-error h3 {
    font-size: calc(1.6rem + var(--header-size-bump));
}

.review-compact .quiz-icon {
    margin-bottom: 1rem;
}

.review-compact .quiz-icon svg,
.review-compact .quiz-error svg {
    width: 48px;
    height: 48px;
}

.review-compact .round-selection {
    margin-top: 1.4rem;
}

.review-compact .round-label,
.review-compact .quiz-info,
.review-compact .quiz-progress,
.review-compact .quiz-score,
.review-compact .question-prompt h3,
.review-compact .question-prompt,
.review-compact .quiz-error p {
    font-size: 0.92rem;
}

.review-compact .round-buttons {
    gap: 0.75rem;
    margin-bottom: 1.4rem;
}

.review-compact .btn-round {
    padding: 1.05rem 0.9rem;
    gap: 0.35rem;
}

.review-compact .round-number {
    font-size: 2rem;
}

.review-compact .quiz-header {
    margin-bottom: 0.9rem;
    padding-bottom: 0.55rem;
}

.review-compact .quiz-timer {
    padding: 0.3rem 0.65rem;
    font-size: 0.9rem;
}

.review-compact .question-image {
    margin: 1rem 0;
}

.review-compact .question-image img {
    max-height: 220px;
}

.review-compact .question-audio {
    margin: 0.55rem 0;
}

.review-compact .btn-audio {
    padding: 0.55rem 1rem;
    font-size: 0.9rem;
}

.review-compact .question-prompt {
    margin: 0.7rem 0;
}

.review-compact .question-term {
    font-size: 2rem;
    margin: 0.35rem 0;
}

.review-compact .quiz-options {
    gap: 0.6rem;
    margin: 0.85rem 0;
}

.review-compact .quiz-option {
    padding: 0.68rem 1.1rem;
    font-size: 1rem;
}

.review-compact .type-in-container {
    margin: 1.4rem 0;
    gap: 0.8rem;
}

.review-compact .type-in-input {
    max-width: 420px;
    padding: 0.8rem 1rem;
    font-size: 1rem;
}

.review-compact .btn-submit {
    padding: 0.6rem 1.4rem;
    font-size: 0.98rem;
}

.review-compact .special-char-panel {
    max-width: 420px;
    margin-top: -0.1rem;
}

.review-compact .special-char-button {
    min-width: 28px;
    height: 28px;
    font-size: 0.7rem;
}

.review-compact .correct-answer-display {
    padding: 0.75rem;
    font-size: 0.95rem;
}

.review-compact .results-emoji {
    font-size: 4rem;
}

.review-compact .score-circle {
    width: 124px;
    height: 124px;
}

.review-compact .score-number {
    font-size: 2.8rem;
}

.review-compact .score-total {
    font-size: 1.15rem;
}

.review-compact .score-percentage {
    font-size: 1.6rem;
}

.review-compact .results-stats {
    padding: 1rem;
    gap: 0.75rem;
    margin: 1rem 0;
}

.review-compact .stat-value {
    font-size: 2rem;
}

.review-compact .results-actions {
    margin-top: 1.4rem;
}

.review-compact .results-actions .btn,
.review-compact .quiz-error .btn,
.review-compact .quiz-results .btn {
    padding: 0.6rem 1.1rem;
    font-size: 0.92rem;
}

.review-compact .quiz-score {
    margin-top: 1.4rem;
    padding-top: 1rem;
}

.review-compact > .container {
    max-width: 1180px;
}

@media (max-width: 768px) {
    .review-compact .quiz-setup,
    .review-compact .quiz-question,
    .review-compact .quiz-results,
    .review-compact .quiz-error {
        padding: 0.7rem;
    }

    .review-compact .quiz-header {
        flex-direction: row;
        align-items: flex-start;
        justify-content: space-between;
        gap: 0.55rem;
    }

    .review-compact .quiz-progress {
        flex: 1;
        min-width: 0;
        line-height: 1.25;
    }

    .review-compact .quiz-timer {
        flex-shrink: 0;
        margin-left: auto;
        white-space: nowrap;
    }

    .review-compact .question-audio {
        margin: 0.45rem 0;
    }

    .review-compact .question-prompt {
        margin: 0.55rem 0;
    }

    .review-compact .question-term {
        margin: 0.25rem 0;
    }

    .review-compact .quiz-options {
        gap: 0.5rem;
        margin: 0.65rem 0;
    }

    .review-compact .quiz-option {
        padding: 0.56rem 0.9rem;
    }

    .review-compact .question-term {
        font-size: 1.45rem;
    }

    .review-compact .question-image img {
        max-height: 180px;
    }

    .review-compact .round-selection .round-buttons:not(.mode-buttons) {
        grid-template-columns: repeat(3, minmax(74px, 1fr));
        gap: 0.5rem;
    }

    .review-compact .btn-round {
        aspect-ratio: 1 / 1;
        padding: 0.24rem;
        min-height: 0;
        justify-content: center;
    }

    .review-compact .btn-round.btn-mode {
        aspect-ratio: auto;
        min-height: 74px;
        align-items: flex-start;
        text-align: left;
        padding: 0.36rem 0.52rem;
        gap: 0.2rem;
    }

    .review-compact .btn-round[data-fill-source] {
        aspect-ratio: auto;
        min-height: 0;
        justify-content: center;
        padding: 0.56rem 0.9rem;
    }

    .review-compact .btn-round[data-fill-source] .round-text {
        font-size: 0.95rem;
        line-height: 1.2;
    }

    .review-compact .round-number {
        font-size: 1.78rem;
    }

    .review-compact .round-text {
        font-size: 0.82rem;
    }

    .review-compact .btn-mode .mode-title {
        font-size: 1.3rem;
    }

    .review-compact .btn-mode .mode-description {
        font-size: 1rem;
        line-height: 1.22;
    }

    .review-compact .score-circle {
        width: 108px;
        height: 108px;
    }

    .review-compact .results-stats {
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 0.45rem;
        padding: 0.75rem;
        margin: 0.85rem 0;
    }

    .review-compact .results-stats .stat {
        min-width: 0;
    }

    .review-compact .results-stats .stat-value {
        font-size: 1.35rem;
    }

    .review-compact .results-stats .stat-label {
        font-size: 0.72rem;
    }

    .review-compact .results-stats .stat {
        padding: 0.2rem 0;
    }

}

/* Responsive Quiz Styles */
@media (max-width: 768px) {
    .quiz-setup,
    .quiz-question,
    .quiz-results,
    .quiz-error {
        padding: 1.1rem;
    }

    .round-buttons {
        grid-template-columns: 1fr;
    }

    .quiz-header {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }

    .question-term {
        font-size: 1.65rem;
    }

    .quiz-option {
        padding: 0.85rem;
    }

    .results-stats {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .results-actions {
        flex-direction: column;
    }

    .results-actions .btn {
        width: 100%;
        justify-content: center;
    }
}
/* Matching Game Styles */
.game-container {
    padding: .25rem 0;
}

.game-setup {
    background: var(--color-card);
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    padding: 3rem;
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.game-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100px;
    height: 100px;
    background: var(--color-secondary);
    border-radius: 50%;
    margin: 0 auto 2rem;
}

.game-icon svg {
    color: var(--color-primary-dark);
    width: 60px;
    height: 60px;
}

.game-setup h3 {
    font-size: calc(2rem + var(--header-size-bump));
    margin-bottom: 0.5rem;
    color: var(--color-text);
}

.game-setup > p {
    color: var(--color-text-muted);
    margin-bottom: 2rem;
    font-size: 1.2rem;
}

.game-info {
    background: var(--color-secondary);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-bottom: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--color-text);
    font-weight: 500;
}

.info-item svg {
    color: var(--color-primary-dark);
    flex-shrink: 0;
}

.time-limit-selector {
    margin-bottom: 1rem;
}

.time-limit-label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text-muted);
    margin-bottom: 0.45rem;
}

.time-limit-options {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    justify-content: center;
}

.time-limit-options .btn {
    min-width: 120px;
}

.game-setup .round-buttons.mode-buttons {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.35rem;
}

.game-setup .btn-round.btn-mode {
    min-height: 0;
    padding: 1rem;
    border-radius: 22px;
    align-items: center;
    justify-content: center;
    text-align: center;
    width: auto;
    min-width: 120px;
}

.game-setup .btn-mode .mode-title {
    font-size: 0.9rem;
    line-height: 1.2;
}

.btn-large {
    font-size: 1.1rem;
    padding: 1rem 2rem;
    width: 100%;
}

/* Matching Game Board */
.matching-game {
    background: rgba(28, 17, 52, 0.58);
    border: 2px solid rgba(233, 216, 255, 0.28);
    backdrop-filter: blur(10px);
    box-shadow: 0 12px 32px rgba(6, 1, 20, 0.24);
    border-radius: var(--radius);
    padding: 2rem;
    min-height: 500px;
}

.game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 2px solid var(--color-border);
}

.game-progress h3 {
    font-size: calc(1.5rem + var(--header-size-bump));
    color: var(--color-primary-dark);
}

.game-timer {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--color-text);
    padding: 0.5rem 1rem;
    background: var(--color-secondary);
    border-radius: var(--radius);
}

.game-timer svg {
    color: var(--color-primary-dark);
}

.game-timer.warning {
    color: var(--color-error);
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.matching-board {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
    min-height: 400px;
    align-content: start;
}

.board-legend {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.legend-pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.32rem 0.72rem;
    border-radius: 999px;
    font-size: 0.82rem;
    font-weight: 600;
    border: 1px solid #574200;
    color: #2a2100;
}

.legend-pill.term-pill {
    background: #fff6cf;
    border-color: #574200;
    color: #2a2100;
}

.legend-pill.definition-pill {
    background: #f5d548;
    border-color: #574200;
    color: #2a2100;
}

.term-tile,
.definition-tile {
    border: 2px solid;
    border-radius: var(--radius);
    padding: 1rem 0.8rem;
    font-weight: 500;
    color: var(--color-text);
    text-align: center;
    user-select: none;
    transition: all 0.2s ease;
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.term-tile {
    background: #fff6cf;
    border-color: #574200;
    color: #2a2100;
    cursor: grab;
}

.definition-tile {
    background: #f5d548;
    border-color: #574200;
    color: #2a2100;
    cursor: pointer;
}

.term-tile:not(.matched):hover,
.definition-tile:not(.matched):hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    border-color: #2f2500;
}

.term-tile.selected {
    border-color: #e39b00;
    box-shadow: 0 0 0 3px rgba(227, 155, 0, 0.22);
    transform: translateY(-1px);
}

.term-tile.dragging {
    opacity: 0.5;
    transform: scale(0.95);
    cursor: grabbing;
}

.definition-tile.drag-over {
    background: #f8df73;
    border-color: #2f2500;
    box-shadow: 0 0 10px rgba(87, 66, 0, 0.28);
}

.term-tile.matched,
.definition-tile.matched {
    background: #d7f0d5;
    border-color: #2c6e2f;
    color: #19391b;
    cursor: default;
    opacity: 0.7;
    pointer-events: none;
}

.term-tile.matched span,
.definition-tile.matched span {
    text-decoration: line-through;
    opacity: 0.6;
}

.definition-tile.shake {
    animation: shake 0.5s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}

/* Game Results */
.game-results {
    background: var(--color-card);
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    padding: 3rem;
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.result-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 120px;
    height: 120px;
    background: var(--color-secondary);
    border-radius: 50%;
    margin: 0 auto 2rem;
}

.game-won .result-icon {
    background: rgba(40, 167, 69, 0.2);
}

.game-won .result-icon svg {
    color: var(--color-success);
    width: 80px;
    height: 80px;
}

.game-over .result-icon {
    background: rgba(212, 24, 61, 0.1);
}

.game-over .result-icon svg {
    color: var(--color-error);
    width: 80px;
    height: 80px;
}

.game-results h3 {
    font-size: calc(2rem + var(--header-size-bump));
    margin-bottom: 1rem;
    color: var(--color-text);
}

.result-score {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--color-primary-dark);
    margin-bottom: 0.5rem;
}

.result-time,
.result-accuracy {
    color: var(--color-text-muted);
    margin-bottom: 0.25rem;
}

.result-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
    flex-wrap: wrap;
}

.result-actions .btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

/* Error State */
.error-state {
    background: var(--color-card);
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    padding: 3rem;
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.error-state svg {
    color: var(--color-error);
    margin-bottom: 1rem;
}

.error-state h3 {
    font-size: calc(2rem + var(--header-size-bump));
    margin-bottom: 1rem;
    color: var(--color-text);
}

.error-state p {
    color: var(--color-text-muted);
    margin-bottom: 2rem;
}

/* Responsive Matching Game */
@media (max-width: 768px) {
    .matching-board {
        gap: 0.6rem;
        min-height: auto;
    }

    .game-setup {
        padding: 0.85rem;
    }

    .game-icon {
        width: 68px;
        height: 68px;
        margin: 0 auto 0.85rem;
    }

    .game-icon svg {
        width: 38px;
        height: 38px;
    }

    .game-setup h3 {
        font-size: calc(1.45rem + var(--header-size-bump));
        margin-bottom: 0.35rem;
    }

    .game-setup > p {
        margin-bottom: 1.1rem;
        font-size: 0.92rem;
    }

    .matching-game .game-header {
        flex-direction: row;
        gap: 0.6rem;
        align-items: center;
        justify-content: space-between;
        flex-wrap: nowrap;
        border-bottom: 2px solid var(--color-border);
        padding-bottom: 1rem;
    }

    .matching-game .game-progress {
        min-width: 0;
    }

    .matching-game .game-progress h3 {
        margin: 0;
        font-size: calc(1.15rem + var(--header-size-bump));
        white-space: nowrap;
    }

    .matching-game .game-timer {
        flex-shrink: 0;
        white-space: nowrap;
        padding: 0.4rem 0.7rem;
    }

    .game-setup .round-buttons.mode-buttons {
        gap: 0.45rem;
        margin-bottom: 1rem;
    }

    .game-setup .btn-round.btn-mode {
        min-width: 108px;
        padding: 0.48rem 0.75rem;
    }

    .game-timer {
        font-size: 1rem;
    }

    .matching-game {
        padding: 0.8rem;
    }

    .term-tile,
    .definition-tile {
        padding: 0.8rem;
        min-height: 56px;
        font-size: 0.9rem;
    }

    .game-results {
        padding: 1.35rem 0.85rem;
    }

    .result-icon {
        width: 90px;
        height: 90px;
    }

    .game-won .result-icon svg,
    .game-over .result-icon svg {
        width: 60px;
        height: 60px;
    }

    .game-results h3 {
        font-size: calc(1.5rem + var(--header-size-bump));
    }

    .result-actions {
        flex-direction: column;
    }

    .result-actions .btn {
        width: 100%;
        justify-content: center;
    }
}