/* Chinese Learning Styles */
/* Imports main.css for base styles */

/* ── Typography for Chinese ── */
.chinese-char {
    font-family: 'STSong', 'SimSun', 'AR PL UMing CN', 'Noto Serif CJK SC', serif;
    font-size: 2.5em;
    line-height: 1.2;
}

.chinese-text {
    font-family: 'STSong', 'SimSun', 'AR PL UMing CN', 'Noto Serif CJK SC', serif;
}

.pinyin {
    font-family: 'Arial', sans-serif;
    color: #e53e3e;
    font-size: 0.85em;
}

/* ── Color Overrides for Chinese Theme ── */
h1, h2 { color: #c53030; }
.back-link { color: #c53030; border-color: #feb2b2; }
.back-link:hover { background: #c53030; }

/* ── Unit Cards ── */
.unit-card {
    background: white;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    padding: 24px;
    transition: transform 0.2s, box-shadow 0.2s;
    border-left: 6px solid var(--unit-color, #c53030);
}
.unit-card:hover { transform: translateY(-4px); box-shadow: 0 8px 32px rgba(0,0,0,0.15); }

.unit-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}
.unit-number {
    background: var(--unit-color, #c53030);
    color: white;
    border-radius: 50%;
    width: 44px; height: 44px;
    display: flex; align-items: center; justify-content: center;
    font-weight: bold; font-size: 1.1em;
    flex-shrink: 0;
}
.unit-theme {
    color: #718096; font-size: 0.9em;
    margin-bottom: 12px;
}

.lesson-list { list-style: none; padding: 0; margin: 0 0 16px 0; }
.lesson-list li {
    padding: 8px 12px;
    border-radius: 8px;
    margin-bottom: 4px;
    display: flex; align-items: center; gap: 8px;
    background: #f7fafc;
    font-family: 'STSong', 'SimSun', serif;
}
.lesson-list li .lesson-icon { font-size: 1.1em; }

.unit-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.unit-btn {
    padding: 8px 16px;
    border-radius: 20px;
    border: none;
    cursor: pointer;
    font-size: 0.85em;
    font-weight: bold;
    text-decoration: none;
    display: inline-flex; align-items: center; gap: 4px;
    transition: all 0.2s;
}
.btn-primary { background: var(--unit-color, #c53030); color: white; }
.btn-primary:hover { filter: brightness(1.1); color: white; }
.btn-outline { background: white; color: var(--unit-color, #c53030); border: 2px solid var(--unit-color, #c53030); }
.btn-outline:hover { background: var(--unit-color, #c53030); color: white; }

/* ── Lesson Page ── */
.lesson-page { max-width: 900px; margin: 0 auto; }

.lesson-nav {
    display: flex; gap: 12px; flex-wrap: wrap;
    margin: 20px 0;
}
.tab-btn {
    padding: 10px 20px;
    border-radius: 24px;
    border: 2px solid #e2e8f0;
    background: white;
    cursor: pointer;
    font-size: 0.9em;
    font-weight: bold;
    transition: all 0.2s;
    color: #4a5568;
}
.tab-btn.active {
    background: #c53030; color: white; border-color: #c53030;
}
.tab-btn:hover:not(.active) { border-color: #c53030; color: #c53030; }

.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ── Story Reading ── */
.story-box {
    background: #fffaf0;
    border: 2px solid #fbd38d;
    border-radius: 12px;
    padding: 24px;
    margin: 16px 0;
    font-family: 'STSong', 'SimSun', serif;
    font-size: 1.2em;
    line-height: 2;
    white-space: pre-wrap;
}

.story-controls {
    display: flex; gap: 12px; margin-bottom: 12px; flex-wrap: wrap;
}
.speak-story-btn {
    padding: 8px 20px;
    background: #c53030; color: white;
    border: none; border-radius: 20px;
    cursor: pointer; font-size: 0.9em; font-weight: bold;
    display: flex; align-items: center; gap: 6px;
    transition: all 0.2s;
}
.speak-story-btn:hover { background: #9b2c2c; }

/* ── Character Grid ── */
.char-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 16px;
    margin: 16px 0;
}

.char-card {
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.1);
    padding: 16px;
    text-align: center;
    cursor: pointer;
    transition: all 0.25s;
    border: 2px solid transparent;
    position: relative;
}
.char-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.15);
    border-color: #c53030;
}

.char-display {
    font-family: 'STSong', 'SimSun', 'Heiti SC', serif;
    font-size: 3em;
    color: #1a202c;
    line-height: 1.1;
    margin-bottom: 4px;
}
.char-pinyin {
    color: #e53e3e;
    font-size: 1em;
    font-weight: bold;
    margin-bottom: 4px;
}
.char-meaning {
    color: #718096;
    font-size: 0.78em;
    line-height: 1.3;
}
.char-example {
    margin-top: 6px;
    font-family: 'STSong', 'SimSun', serif;
    color: #4a5568;
    font-size: 1em;
    font-weight: bold;
}
.char-strokes {
    position: absolute; top: 6px; right: 8px;
    font-size: 0.7em; color: #a0aec0;
}
.char-speak-btn {
    background: none; border: none; cursor: pointer;
    font-size: 1.2em; position: absolute; top: 6px; left: 8px;
    opacity: 0.6; transition: opacity 0.2s;
}
.char-speak-btn:hover { opacity: 1; }

/* ── Vocabulary Table ── */
.vocab-table {
    width: 100%; border-collapse: collapse;
    margin: 16px 0;
}
.vocab-table th {
    background: #c53030; color: white;
    padding: 10px 14px; text-align: left;
    font-size: 0.9em;
}
.vocab-table th:first-child { border-radius: 8px 0 0 0; }
.vocab-table th:last-child { border-radius: 0 8px 0 0; }
.vocab-table td {
    padding: 10px 14px;
    border-bottom: 1px solid #e2e8f0;
    font-size: 0.95em;
}
.vocab-table tr:nth-child(even) td { background: #fff5f5; }
.vocab-table tr:hover td { background: #fee2e2; }
.vocab-word {
    font-family: 'STSong', 'SimSun', serif;
    font-size: 1.3em;
    font-weight: bold;
    color: #1a202c;
}
.vocab-pinyin { color: #e53e3e; font-size: 0.9em; }
.vocab-speak {
    background: none; border: none; cursor: pointer;
    font-size: 1.1em; padding: 2px 6px;
    opacity: 0.7; transition: opacity 0.2s;
}
.vocab-speak:hover { opacity: 1; }

/* ── Comprension ── */
.qa-list { list-style: none; padding: 0; }
.qa-item {
    background: white;
    border-radius: 12px;
    padding: 16px 20px;
    margin-bottom: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}
.qa-question {
    font-family: 'STSong', 'SimSun', serif;
    font-size: 1.05em;
    font-weight: bold;
    color: #2d3748;
    margin-bottom: 8px;
    cursor: pointer;
    display: flex; justify-content: space-between; align-items: flex-start;
}
.qa-question::after { content: '▼'; font-size: 0.8em; color: #a0aec0; flex-shrink: 0; margin-left: 8px; }
.qa-question.open::after { content: '▲'; }
.qa-answer {
    font-family: 'STSong', 'SimSun', serif;
    font-size: 1em;
    color: #4a5568;
    line-height: 1.6;
    border-left: 3px solid #c53030;
    padding-left: 12px;
    display: none;
}
.qa-item.open .qa-answer { display: block; }

/* ── Practice Section ── */
.practice-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin: 16px 0;
}
.practice-card {
    background: white;
    border-radius: 12px;
    padding: 20px;
    text-align: center;
    box-shadow: 0 2px 12px rgba(0,0,0,0.08);
    text-decoration: none;
    color: #2d3748;
    transition: all 0.25s;
    border: 2px solid transparent;
}
.practice-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.12);
    border-color: #c53030;
    color: #c53030;
}
.practice-icon { font-size: 2.5em; margin-bottom: 8px; }
.practice-title { font-weight: bold; font-size: 1em; margin-bottom: 4px; }
.practice-desc { font-size: 0.8em; color: #718096; }

/* ── Flashcard Styles ── */
.flashcard-area {
    max-width: 600px;
    margin: 0 auto;
}
.flashcard-container {
    perspective: 1000px;
    height: 300px;
    margin: 24px 0;
}
.flashcard {
    width: 100%; height: 100%;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.5s ease;
    cursor: pointer;
}
.flashcard.flipped { transform: rotateY(180deg); }
.flashcard-front, .flashcard-back {
    position: absolute;
    width: 100%; height: 100%;
    backface-visibility: hidden;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 32px rgba(0,0,0,0.15);
    padding: 32px;
}
.flashcard-front {
    background: linear-gradient(135deg, #fff5f5, #ffe4e4);
    border: 3px solid #fed7d7;
}
.flashcard-back {
    background: linear-gradient(135deg, #f0fff4, #c6f6d5);
    border: 3px solid #9ae6b4;
    transform: rotateY(180deg);
}
.fc-char {
    font-family: 'STSong', 'SimSun', 'Heiti SC', serif;
    font-size: 5em;
    color: #1a202c;
    text-align: center;
    line-height: 1;
}
.fc-back-content { text-align: center; }
.fc-pinyin { color: #e53e3e; font-size: 1.8em; font-weight: bold; margin: 8px 0; }
.fc-meaning { color: #2d3748; font-size: 1.1em; margin: 4px 0; }
.fc-example {
    font-family: 'STSong', 'SimSun', serif;
    font-size: 1.3em;
    color: #4a5568;
    margin-top: 8px;
}
.fc-hint { font-size: 0.85em; color: #a0aec0; margin-top: 12px; }

.flashcard-controls {
    display: flex; justify-content: center; gap: 16px; margin: 16px 0;
    flex-wrap: wrap;
}
.fc-btn {
    padding: 10px 24px;
    border-radius: 24px; border: none; cursor: pointer;
    font-size: 0.95em; font-weight: bold;
    transition: all 0.2s;
}
.fc-nav { background: #e2e8f0; color: #4a5568; }
.fc-nav:hover { background: #cbd5e0; }
.fc-flip { background: #c53030; color: white; }
.fc-flip:hover { background: #9b2c2c; }
.fc-speak { background: #38a169; color: white; }
.fc-speak:hover { background: #276749; }

.fc-progress { text-align: center; color: #718096; font-size: 0.9em; margin: 8px 0; }

/* ── Dictation Styles ── */
.dictation-word-display {
    text-align: center;
    margin: 24px 0;
}
.dict-play-btn {
    background: #c53030; color: white;
    border: none; border-radius: 12px;
    padding: 16px 32px;
    font-size: 1.1em;
    cursor: pointer;
    display: inline-flex; align-items: center; gap: 10px;
    transition: all 0.2s;
    margin-bottom: 20px;
}
.dict-play-btn:hover { background: #9b2c2c; }
.dict-play-btn .big-icon { font-size: 1.5em; }

.dict-input-area {
    display: flex; gap: 12px; align-items: center;
    justify-content: center; flex-wrap: wrap;
    margin: 16px 0;
}
.dict-input {
    font-family: 'STSong', 'SimSun', serif;
    font-size: 2em;
    width: 200px;
    padding: 12px 16px;
    border: 3px solid #e2e8f0;
    border-radius: 12px;
    text-align: center;
    outline: none;
    transition: border-color 0.2s;
}
.dict-input:focus { border-color: #c53030; }
.dict-input.correct { border-color: #38a169; background: #f0fff4; }
.dict-input.incorrect { border-color: #e53e3e; background: #fff5f5; }

.dict-check-btn {
    padding: 12px 24px;
    background: #c53030; color: white;
    border: none; border-radius: 12px;
    font-size: 1em; font-weight: bold;
    cursor: pointer; transition: all 0.2s;
}
.dict-check-btn:hover { background: #9b2c2c; }

.dict-feedback {
    text-align: center;
    margin: 16px 0;
    padding: 16px;
    border-radius: 12px;
    font-size: 1em;
}
.dict-feedback.correct-fb { background: #f0fff4; border: 2px solid #9ae6b4; color: #276749; }
.dict-feedback.incorrect-fb { background: #fff5f5; border: 2px solid #fed7d7; color: #9b2c2c; }

.dict-correct-display {
    font-family: 'STSong', 'SimSun', serif;
    font-size: 2em;
    color: #276749;
    margin: 8px 0;
}

/* ── Quiz Styles ── */
.quiz-question-text {
    font-family: 'STSong', 'SimSun', serif;
    font-size: 1.1em;
    color: #2d3748;
    margin-bottom: 20px;
    padding: 16px;
    background: #fff5f5;
    border-radius: 12px;
    border-left: 4px solid #c53030;
}
.quiz-char-big {
    font-family: 'STSong', 'SimSun', serif;
    font-size: 3em;
    color: #1a202c;
    display: block;
    margin: 8px 0;
}

.quiz-choices {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin: 16px 0;
}
.quiz-choice {
    padding: 14px 18px;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    cursor: pointer;
    font-size: 0.95em;
    transition: all 0.2s;
    background: white;
    text-align: left;
    font-family: 'STSong', 'SimSun', serif;
}
.quiz-choice:hover:not(:disabled) { border-color: #c53030; background: #fff5f5; }
.quiz-choice.chosen-correct { border-color: #38a169 !important; background: #f0fff4 !important; color: #276749 !important; }
.quiz-choice.chosen-wrong { border-color: #e53e3e !important; background: #fff5f5 !important; color: #9b2c2c !important; }
.quiz-choice.show-correct { border-color: #38a169 !important; background: #f0fff4 !important; }

/* ── Matching Game ── */
.matching-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin: 16px 0;
}
.match-column { display: flex; flex-direction: column; gap: 10px; }
.match-col-title { font-weight: bold; color: #718096; font-size: 0.85em; text-align: center; margin-bottom: 4px; }
.match-item {
    padding: 12px 16px;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s;
    background: white;
    text-align: center;
}
.match-item.chinese { font-family: 'STSong', 'SimSun', serif; font-size: 1.3em; }
.match-item:hover { border-color: #c53030; background: #fff5f5; }
.match-item.selected { border-color: #c53030; background: #fff5f5; color: #c53030; }
.match-item.matched { border-color: #38a169; background: #f0fff4; color: #276749; pointer-events: none; }
.match-item.wrong-flash { border-color: #e53e3e; background: #fff5f5; animation: wrongFlash 0.4s ease; }
@keyframes wrongFlash {
    0%, 100% { background: #fff5f5; }
    50% { background: #fed7d7; }
}

/* ── Festival Display ── */
.festival-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
    margin: 16px 0;
}
.festival-card {
    background: white;
    border-radius: 12px;
    padding: 20px;
    text-align: center;
    box-shadow: 0 2px 12px rgba(0,0,0,0.08);
    border-top: 4px solid #c53030;
    transition: all 0.2s;
}
.festival-card:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0,0,0,0.12); }
.festival-emoji { font-size: 2.5em; margin-bottom: 8px; }
.festival-name { font-family: 'STSong', 'SimSun', serif; font-size: 1.3em; font-weight: bold; color: #c53030; }
.festival-name-en { font-size: 0.8em; color: #718096; margin-bottom: 6px; }
.festival-date { font-size: 0.85em; color: #4a5568; margin-bottom: 8px; }
.festival-customs { font-family: 'STSong', 'SimSun', serif; font-size: 0.9em; color: #4a5568; }

/* ── Progress bar ── */
.progress-bar-wrap {
    background: #e2e8f0;
    border-radius: 99px;
    height: 8px;
    margin: 8px 0;
    overflow: hidden;
}
.progress-bar-fill {
    background: #c53030;
    height: 100%;
    border-radius: 99px;
    transition: width 0.3s ease;
}

/* ── Score Display ── */
.score-display {
    text-align: center;
    background: #fffaf0;
    border: 2px solid #fbd38d;
    border-radius: 12px;
    padding: 20px;
    margin: 16px 0;
}
.score-big { font-size: 2.5em; font-weight: bold; color: #c53030; }

/* ── Selector Controls ── */
.selector-panel {
    background: #f7fafc;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
}
.selector-panel h3 { margin-bottom: 12px; color: #2d3748; }
.lesson-checkboxes { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; }
.lesson-check-label {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 6px 14px;
    border: 2px solid #e2e8f0;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.9em;
}
.lesson-check-label:has(input:checked) { border-color: #c53030; background: #fff5f5; color: #c53030; }
.lesson-check-label input { display: none; }

.settings-row { display: flex; align-items: center; gap: 12px; margin: 12px 0; font-size: 0.9em; }
.settings-row select, .settings-row input[type="number"] {
    padding: 6px 12px; border: 2px solid #e2e8f0; border-radius: 8px;
    font-size: 1em;
}
.settings-row label { color: #4a5568; }

.primary-btn {
    padding: 12px 28px;
    background: #c53030; color: white;
    border: none; border-radius: 24px;
    font-size: 1em; font-weight: bold;
    cursor: pointer; transition: all 0.2s;
    display: inline-block;
}
.primary-btn:hover { background: #9b2c2c; transform: translateY(-2px); }

/* ── Results ── */
.results-card {
    background: white;
    border-radius: 16px;
    padding: 32px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    max-width: 500px;
    margin: 0 auto;
}
.results-card h2 { color: #c53030; font-size: 2em; margin-bottom: 16px; }
.results-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 20px 0; }
.result-item { background: #f7fafc; border-radius: 8px; padding: 12px; }
.result-label { font-size: 0.8em; color: #718096; }
.result-value { font-size: 1.5em; font-weight: bold; color: #2d3748; }
.result-btn { margin: 8px; }

/* ── Responsive ── */
@media (max-width: 640px) {
    .char-grid { grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); }
    .quiz-choices { grid-template-columns: 1fr; }
    .matching-grid { grid-template-columns: 1fr; }
    .practice-grid { grid-template-columns: 1fr 1fr; }
    .fc-char { font-size: 4em; }
    .flashcard-container { height: 260px; }
}

/* ── Stroke order hint ── */
.stroke-hint { font-size: 0.75em; color: #a0aec0; margin-top: 4px; }

/* ── Type badges ── */
.type-badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 12px;
    font-size: 0.75em;
    font-weight: bold;
    margin-left: 6px;
}
.type-story { background: #bee3f8; color: #2b6cb0; }
.type-poem { background: #fefcbf; color: #b7791f; }
.type-fable { background: #c6f6d5; color: #276749; }
.type-informational { background: #e9d8fd; color: #553c9a; }

/* ── Moral box ── */
.moral-box {
    background: linear-gradient(135deg, #fffbeb, #fef3c7);
    border: 2px solid #fbbf24;
    border-radius: 12px;
    padding: 16px 20px;
    margin: 16px 0;
    font-family: 'STSong', 'SimSun', serif;
}
.moral-box .moral-title { font-weight: bold; color: #92400e; margin-bottom: 6px; }
.moral-box p { color: #78350f; line-height: 1.7; }
.moral-box .moral-en { font-family: Arial, sans-serif; font-size: 0.9em; color: #92400e; margin-top: 8px; font-style: italic; }

/* ── Hanzi Writer container ── */
.hanzi-writer-container {
    display: flex; flex-wrap: wrap; gap: 16px;
    justify-content: center;
    margin: 16px 0;
}
.hanzi-char-writer {
    text-align: center;
    background: white;
    border-radius: 12px;
    padding: 16px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.1);
}
.hanzi-char-writer canvas { border-radius: 8px; }
.hanzi-char-label {
    font-size: 0.9em; color: #718096;
    margin-top: 6px;
    font-family: 'STSong', 'SimSun', serif;
}
.hw-btn {
    background: #c53030; color: white;
    border: none; border-radius: 8px;
    padding: 4px 12px;
    font-size: 0.8em;
    cursor: pointer; margin-top: 6px;
}
.hw-btn:hover { background: #9b2c2c; }

/* hidden utility */
.hidden { display: none !important; }

/* ── Quiz page (quiz.html) ── */
.quiz-question-card {
    background: #fff5f5;
    border: 2px solid #fed7d7;
    border-radius: 16px;
    padding: 24px;
    text-align: center;
    margin: 16px 0;
    min-height: 110px;
}
.quiz-char-display {
    font-family: 'STSong', 'SimSun', 'AR PL UMing CN', 'Noto Serif CJK SC', serif;
    font-size: 3em;
    color: #1a202c;
    cursor: pointer;
    margin: 4px 0;
}
.quiz-choice-btn {
    padding: 14px 18px;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    cursor: pointer;
    font-size: 1em;
    transition: all 0.2s;
    background: white;
    text-align: center;
    width: 100%;
}
.quiz-choice-btn:hover:not(:disabled) { border-color: #c53030; background: #fff5f5; }
.quiz-choice-btn.choice-correct { border-color: #38a169 !important; background: #f0fff4 !important; color: #276749 !important; }
.quiz-choice-btn.choice-wrong { border-color: #e53e3e !important; background: #fff5f5 !important; color: #9b2c2c !important; }
.quiz-choices { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 16px 0; }
.quiz-feedback {
    text-align: center;
    padding: 12px 16px;
    border-radius: 12px;
    font-size: 1em;
    margin: 8px 0;
}
.quiz-feedback.fb-correct { background: #f0fff4; border: 2px solid #9ae6b4; color: #276749; }
.quiz-feedback.fb-wrong { background: #fff5f5; border: 2px solid #fed7d7; color: #9b2c2c; }

/* ── Dictation additions ── */
.dict-input-area { display: flex; gap: 10px; margin: 16px 0; flex-wrap: wrap; }
.dict-input {
    flex: 1; min-width: 180px;
    padding: 14px 18px;
    font-size: 1.4em;
    font-family: 'STSong', 'SimSun', serif;
    border: 3px solid #e2e8f0;
    border-radius: 12px;
    outline: none;
    transition: border-color 0.2s;
}
.dict-input:focus { border-color: #c53030; }
.dict-input.correct { border-color: #38a169; background: #f0fff4; }
.dict-input.incorrect { border-color: #e53e3e; background: #fff5f5; }
.dict-check-btn {
    padding: 12px 24px;
    background: #c53030; color: white;
    border: none; border-radius: 12px;
    font-size: 1em; cursor: pointer; transition: all 0.2s;
}
.dict-check-btn:hover { background: #9b2c2c; }
.dict-feedback {
    text-align: center;
    padding: 16px;
    border-radius: 12px;
    margin: 8px 0;
}
.dict-correct-display {
    font-family: 'STSong', 'SimSun', serif;
    font-size: 2.5em;
    font-weight: bold;
    color: #c53030;
    margin: 8px 0;
}

@media (max-width: 640px) {
    .quiz-choices { grid-template-columns: 1fr; }
    .dict-input-area { flex-direction: column; }
}