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solid var(--border-color);cursor:pointer;box-shadow:var(--shadow-card);border-radius:16px;flex-direction:column;align-items:center;gap:8px;padding:24px 16px;transition:all .2s;display:flex}.quiz-category-card:hover{background:var(--bg-card-hover);border-color:var(--border-active);transform:translateY(-2px);box-shadow:0 4px 16px #00000040}.quiz-cat-emoji{font-size:36px;line-height:1}.quiz-cat-label{color:var(--text-primary);font-size:14px;font-weight:600}.quiz-hint-area{margin-left:auto}.quiz-hint-btn{background:var(--btn-secondary-bg);color:var(--text-secondary);border:1px solid var(--border-color);border-radius:100px;padding:6px 14px;font-size:12px;font-weight:600;transition:all .2s}.quiz-hint-btn:hover:not(:disabled){color:var(--accent-noun);border-color:var(--accent-noun)}.quiz-hint-btn:disabled{opacity:.4;cursor:default}.quiz-word-bank{background:var(--bg-card);border:1px solid var(--border-color);border-radius:16px;flex-wrap:wrap;justify-content:center;gap:8px;margin-bottom:24px;padding:16px;display:flex}.quiz-chip{background:var(--btn-secondary-bg);color:var(--text-primary);border:2px solid var(--border-color);cursor:pointer;border-radius:100px;padding:8px 18px;font-family:Noto Sans KR,sans-serif;font-size:16px;font-weight:500;transition:all .2s}.quiz-chip:hover:not(:disabled){border-color:var(--border-active);background:var(--bg-card-hover)}.quiz-chip.selected{border-color:var(--btn-primary-bg-flat);background:var(--btn-primary-bg);color:var(--btn-primary-text);box-shadow:0 0 12px var(--btn-primary-bg-flat)}.quiz-chip.used{opacity:.3;cursor:default;text-decoration:line-through}.quiz-chip.eliminated{opacity:.15;cursor:default;text-decoration:line-through}.quiz-targets{grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:10px;display:grid}.quiz-target{background:var(--bg-card);border:2px solid var(--border-color);cursor:default;text-align:center;border-radius:14px;flex-direction:column;align-items:center;gap:6px;min-height:100px;padding:20px 12px 16px;transition:all .2s;display:flex}.quiz-target.selectable{cursor:pointer}.quiz-target.selectable:hover{border-color:var(--border-active);background:var(--bg-card-hover)}.quiz-target.correct{border-color:var(--accent-verb);background:var(--accent-verb-glow)}.quiz-target.wrong{border-color:var(--accent-blank);background:#ef444414}.quiz-target-emoji{font-size:28px;line-height:1}.quiz-target-en{color:var(--text-secondary);font-size:13px;font-weight:500}.quiz-target-matched{color:var(--text-primary);margin-top:2px;font-family:Noto Sans KR,sans-serif;font-size:14px;font-weight:600}.quiz-score-card{background:var(--bg-card);border:1px solid var(--border-color);box-shadow:var(--shadow-card);border-radius:20px;flex-direction:column;align-items:center;gap:12px;margin-bottom:24px;padding:32px;display:flex}.quiz-score-circle{background:var(--btn-primary-bg);width:100px;height:100px;box-shadow:0 0 20px var(--btn-primary-bg-flat);border-radius:50%;justify-content:center;align-items:center;display:flex}.quiz-score-pct{color:var(--btn-primary-text);font-size:28px;font-weight:700}.quiz-score-text{color:var(--text-secondary);font-size:16px;font-weight:500}.quiz-perfect{color:var(--accent-verb);text-transform:uppercase;letter-spacing:.08em;font-size:14px;font-weight:700}.quiz-wrong-list{margin-bottom:24px}.quiz-wrong-list h4{text-transform:uppercase;color:var(--text-muted);letter-spacing:.1em;margin-bottom:10px;font-size:12px;font-weight:700}.quiz-wrong-item{background:var(--bg-card);border:1px solid var(--border-color);cursor:pointer;border-radius:10px;align-items:center;gap:10px;margin-bottom:6px;padding:10px 14px;transition:all .15s;display:flex}.quiz-wrong-item:hover{background:var(--bg-card-hover);border-color:var(--border-active)}.quiz-wrong-emoji{font-size:20px}.quiz-wrong-kr{color:var(--text-primary);font-family:Noto Sans KR,sans-serif;font-size:16px;font-weight:500}.quiz-wrong-en{color:var(--text-muted);margin-left:auto;font-size:13px}.quiz-actions{justify-content:center;gap:10px;display:flex}.quiz-retry-btn{background:var(--btn-primary-bg);color:var(--btn-primary-text);box-shadow:var(--btn-primary-shadow);border-radius:14px;padding:12px 28px;font-size:15px;font-weight:600;transition:all .2s}.quiz-retry-btn:hover{box-shadow:var(--btn-hover-lift), var(--btn-primary-shadow);transform:translateY(-1px)}.learn-section{width:100%;max-width:720px;margin:0 auto;padding:32px 24px 48px}.learn-header{margin-bottom:32px}.learn-title{color:var(--text-primary);margin-bottom:8px;font-size:24px;font-weight:700}.learn-subtitle{color:var(--text-muted);font-size:14px;line-height:1.6}.learn-loading{color:var(--text-muted);text-align:center;padding:48px 16px;font-size:14px}.lesson-grid{flex-direction:column;gap:12px;display:flex}.lesson-card{text-align:left;background:var(--bg-card);border:1px solid var(--border-color);border-radius:16px;flex-direction:column;align-items:flex-start;gap:6px;padding:20px 24px;transition:all .2s;display:flex}.lesson-card:hover{background:var(--bg-card-hover);border-color:var(--border-active);box-shadow:var(--shadow-card);transform:translateY(-1px)}.lesson-number{text-transform:uppercase;letter-spacing:.08em;color:var(--btn-primary-bg-flat);font-size:11px;font-weight:700}.lesson-card-title{color:var(--text-primary);font-size:17px;font-weight:600}.lesson-card-desc{color:var(--text-muted);font-size:13px;line-height:1.5}.lesson-card-meta{gap:12px;margin-top:4px;display:flex}.lesson-char-count,.lesson-exercise-count{color:var(--text-muted);background:var(--btn-secondary-bg);border:1px solid var(--border-color);border-radius:100px;padding:2px 10px;font-size:11px;font-weight:600}.lesson-char-preview{flex-wrap:wrap;gap:6px;margin-top:6px;display:flex}.lesson-char-chip{background:var(--btn-secondary-bg);color:var(--text-secondary);border:1px solid var(--border-color);border-radius:6px;padding:2px 8px;font-family:Noto Sans KR,sans-serif;font-size:15px;font-weight:400}.lesson-char-chip.more{color:var(--text-muted);font-size:11px;font-weight:600}.lesson-view{width:100%;max-width:640px;margin:0 auto;padding:24px 24px 48px}.back-btn{background:var(--btn-secondary-bg);color:var(--text-secondary);border:1px solid var(--border-color);border-radius:8px;align-items:center;gap:6px;margin-bottom:20px;padding:6px 14px;font-size:13px;font-weight:500;transition:all .2s;display:inline-flex}.back-btn:hover{color:var(--text-primary);border-color:var(--border-active)}.lesson-view-header{margin-bottom:28px}.lesson-view-title{color:var(--text-primary);margin-top:4px;margin-bottom:8px;font-size:22px;font-weight:700}.lesson-view-desc{color:var(--text-muted);font-size:14px;line-height:1.6}.section-label{text-transform:uppercase;letter-spacing:.1em;color:var(--text-muted);margin-bottom:14px;font-size:11px;font-weight:700}.character-grid{grid-template-columns:repeat(auto-fill,minmax(72px,1fr));gap:8px;margin-bottom:20px;display:grid}.char-grid-item{background:var(--bg-card);border:1px solid var(--border-color);border-radius:12px;flex-direction:column;align-items:center;gap:4px;padding:14px 8px;transition:all .2s;display:flex}.char-grid-item:hover{background:var(--bg-card-hover);border-color:var(--border-active);transform:translateY(-1px)}.char-grid-item.consonant .char-grid-char{color:#f87171}.char-grid-item.vowel .char-grid-char{color:#60a5fa}.char-grid-char{font-family:Noto Sans KR,sans-serif;font-size:28px;font-weight:400;line-height:1}.char-grid-rom{color:var(--text-muted);font-size:11px;font-weight:500}.start-learning-btn,.start-exercises-btn{background:var(--btn-primary-bg);width:100%;color:var(--btn-primary-text);box-shadow:var(--btn-primary-shadow);border:none;border-radius:14px;margin-top:8px;padding:14px;font-size:15px;font-weight:600;transition:all .2s;display:block}.start-learning-btn:hover,.start-exercises-btn:hover{box-shadow:var(--btn-hover-lift), var(--btn-primary-shadow);transform:translateY(-1px)}.skip-to-exercises-btn{background:var(--btn-secondary-bg);width:100%;color:var(--text-secondary);border:1px solid var(--border-color);border-radius:12px;margin-top:8px;padding:12px;font-size:13px;font-weight:500;transition:all 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#60a5fa33}.char-large{font-family:Noto Sans KR,sans-serif;font-size:96px;font-weight:400;line-height:1}.char-romanization{color:var(--text-secondary);font-size:20px;font-weight:600}.char-type-badge{text-transform:uppercase;letter-spacing:.1em;color:var(--text-muted);background:var(--btn-secondary-bg);border:1px solid var(--border-color);border-radius:100px;padding:3px 12px;font-size:10px;font-weight:700}.char-section{background:var(--bg-card);border:1px solid var(--border-color);border-radius:14px;margin-bottom:12px;padding:16px 20px}.char-section-label{text-transform:uppercase;letter-spacing:.1em;color:var(--text-muted);margin-bottom:8px;font-size:11px;font-weight:700}.char-section-text{color:var(--text-secondary);font-size:14px;line-height:1.6}.char-section.phonetic-bridge{border-color:#4ade8026}.char-section.phonetic-bridge .char-section-label{color:var(--accent-verb)}.char-section.mouth-position{border-color:#ff8c4226}.char-section.mouth-position .char-section-label{color:var(--accent-noun)}.stroke-order-display{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.stroke-number{background:var(--btn-secondary-bg);width:28px;height:28px;color:var(--text-secondary);border:1px solid var(--border-color);border-radius:50%;justify-content:center;align-items:center;font-size:13px;font-weight:700;display:flex}.stroke-hint{color:var(--text-muted);margin-left:4px;font-size:12px}.char-words{flex-direction:column;gap:8px;display:flex}.char-word-item{background:var(--bg-card-hover);border:1px solid var(--border-color);border-radius:10px;flex-direction:column;gap:2px;padding:10px 14px;display:flex}.char-word-top{align-items:baseline;gap:10px;display:flex}.char-word-kr{color:var(--text-primary);font-family:Noto Sans KR,sans-serif;font-size:18px;font-weight:500}.char-word-rom{color:var(--text-muted);font-size:12px}.char-word-en{color:var(--text-muted);font-size:13px}.char-word-item .lantern-player{flex-direction:row;gap:8px;margin:4px 0 0}.char-word-item .lantern{width:28px;height:38px}.char-card-actions{gap:10px;margin-top:24px;display:flex}.char-nav-btn{border:none;border-radius:14px;flex:1;padding:14px;font-size:14px;font-weight:600;transition:all .2s}.char-nav-btn.prev{background:var(--btn-secondary-bg);color:var(--text-secondary);border:1px solid var(--border-color)}.char-nav-btn.prev:hover{color:var(--text-primary);border-color:var(--border-active)}.char-nav-btn.next{background:var(--btn-primary-bg);color:var(--btn-primary-text);box-shadow:var(--btn-primary-shadow)}.char-nav-btn.next:hover{box-shadow:var(--btn-hover-lift), var(--btn-primary-shadow);transform:translateY(-1px)}.exercise-view{width:100%;max-width:560px;margin:0 auto;padding:24px 24px 48px}.exercise-top-bar{justify-content:space-between;align-items:center;margin-bottom:24px;display:flex}.exercise-progress{color:var(--text-muted);background:var(--btn-secondary-bg);border:1px solid var(--border-color);border-radius:100px;padding:4px 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.2s}.exercise-option:hover:not(:disabled){border-color:var(--border-active);background:var(--bg-card-hover)}.exercise-option.selected{border-color:var(--btn-primary-bg-flat)}.exercise-option.correct{border-color:var(--accent-verb);background:var(--accent-verb-glow);color:var(--accent-verb)}.exercise-option.wrong{border-color:var(--accent-blank);background:var(--accent-blank-glow);color:var(--accent-blank)}.exercise-feedback{border-radius:10px;margin-bottom:16px;padding:8px 16px;font-size:15px;font-weight:600}.exercise-feedback.correct{color:var(--accent-verb);background:var(--accent-verb-glow)}.exercise-feedback.wrong{color:var(--accent-blank);background:var(--accent-blank-glow)}.exercise-next-btn{background:var(--btn-primary-bg);color:var(--btn-primary-text);box-shadow:var(--btn-primary-shadow);border:none;border-radius:14px;padding:14px 40px;font-size:15px;font-weight:600;transition:all .2s}.exercise-next-btn:hover{box-shadow:var(--btn-hover-lift), var(--btn-primary-shadow);transform:translateY(-1px)}.match-pairs-grid{justify-content:center;gap:20px;margin-bottom:20px;display:flex}.match-column{flex-direction:column;gap:8px;display:flex}.match-item{background:var(--btn-secondary-bg);border:2px solid var(--border-color);color:var(--text-primary);border-radius:12px;min-width:80px;padding:12px 20px;font-family:Noto Sans KR,sans-serif;font-size:18px;transition:all .2s}.match-item.rom{font-family:Inter,sans-serif;font-size:14px;font-weight:500}.match-item:hover:not(:disabled){border-color:var(--border-active)}.match-item.selected{border-color:var(--btn-primary-bg-flat);background:var(--accent-noun-glow)}.match-item.matched{border-color:var(--accent-verb);background:var(--accent-verb-glow);color:var(--accent-verb);opacity:.7}.exercise-complete{text-align:center;padding:48px 24px}.exercise-complete-icon{margin-bottom:16px;font-size:48px}.exercise-complete h3{color:var(--text-primary);margin-bottom:8px;font-size:22px;font-weight:700}.exercise-complete p{color:var(--text-muted);margin-bottom:24px;font-size:15px}.exercise-complete-actions{flex-direction:column;align-items:center;gap:10px;display:flex}.hangul-chart-overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:200;background:#0009;justify-content:center;align-items:center;padding:24px;display:flex;position:fixed;inset:0}.hangul-chart{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:20px;width:100%;max-width:600px;max-height:85vh;overflow-y:auto;box-shadow:0 8px 48px #00000080}.hangul-chart-header{border-bottom:1px solid var(--border-color);background:var(--bg-secondary);z-index:1;justify-content:space-between;align-items:center;padding:16px 20px;display:flex;position:sticky;top:0}.hangul-chart-header h3{color:var(--text-primary);font-size:16px;font-weight:700}.hangul-chart-close{background:var(--btn-secondary-bg);width:32px;height:32px;color:var(--text-muted);border:1px solid var(--border-color);border-radius:8px;justify-content:center;align-items:center;font-size:20px;transition:all .2s;display:flex}.hangul-chart-close:hover{color:var(--text-primary);border-color:var(--border-active)}.hangul-chart-body{padding:20px}.chart-group{margin-bottom:20px}.chart-group-label{text-transform:uppercase;letter-spacing:.1em;margin-bottom:10px;font-size:11px;font-weight:700}.consonant-label{color:#f87171}.vowel-label{color:#60a5fa}.chart-grid{grid-template-columns:repeat(auto-fill,minmax(58px,1fr));gap:6px;display:grid}.chart-cell{background:var(--bg-card);border:1px solid var(--border-color);border-radius:10px;flex-direction:column;align-items:center;gap:2px;padding:10px 4px;transition:all 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