:root{--native-primary: #2563eb;--native-light: #eff6ff;--native-dark: #1d4ed8;--sino-primary: #059669;--sino-light: #ecfdf5;--sino-dark: #047857;--correct: #059669;--incorrect: #dc2626;--bg-primary: #ffffff;--bg-secondary: #f9fafb;--bg-tertiary: #f3f4f6;--text-primary: #111827;--text-secondary: #6b7280;--text-muted: #9ca3af;--border: #e5e7eb;--border-light: #f3f4f6;--font-korean: "Noto Sans KR", sans-serif;--font-latin: "Inter", system-ui, -apple-system, sans-serif;--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--spacing-2xl: 3rem;--radius-sm: 6px;--radius: 8px;--radius-lg: 12px;--radius-xl: 16px;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow: 0 1px 3px 0 rgb(0 0 0 / .1), 0 1px 2px -1px rgb(0 0 0 / .1);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 6px -4px rgb(0 0 0 / .1);--transition: .15s ease;--transition-slow: .3s ease}[data-theme=dark]{--native-primary: #60a5fa;--native-light: #1e3a5f;--native-dark: #3b82f6;--sino-primary: #34d399;--sino-light: #134e4a;--sino-dark: #10b981;--correct: #34d399;--incorrect: #f87171;--bg-primary: #1f2937;--bg-secondary: #111827;--bg-tertiary: #374151;--text-primary: #f9fafb;--text-secondary: #d1d5db;--text-muted: #9ca3af;--border: #374151;--border-light: #4b5563}*{box-sizing:border-box;margin:0;padding:0}html{color-scheme:light}[data-theme=dark]{color-scheme:dark}body{font-family:var(--font-latin);background-color:var(--bg-secondary);color:var(--text-primary);line-height:1.6;min-height:100vh;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;transition:background-color var(--transition),color var(--transition)}#root{min-height:100vh;display:flex;flex-direction:column}.korean-text{font-family:var(--font-korean);font-size:1.75rem;font-weight:500;letter-spacing:-.01em}.korean-text-large{font-family:var(--font-korean);font-size:2.5rem;font-weight:600;letter-spacing:-.02em}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--spacing-sm);padding:var(--spacing-sm) var(--spacing-md);border:none;border-radius:var(--radius);font-family:var(--font-latin);font-size:.9375rem;font-weight:500;cursor:pointer;transition:all var(--transition);outline:none}.btn:focus-visible{box-shadow:0 0 0 2px var(--bg-secondary),0 0 0 4px var(--native-primary)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background-color:var(--native-primary);color:#fff}.btn-primary:hover:not(:disabled){background-color:var(--native-dark);transform:translateY(-1px)}.btn-primary:active:not(:disabled){transform:translateY(0)}.btn-secondary{background-color:var(--bg-primary);color:var(--text-primary);border:1px solid var(--border)}.btn-secondary:hover:not(:disabled){background-color:var(--bg-tertiary);border-color:var(--border-light)}.btn-ghost{background-color:transparent;color:var(--text-secondary)}.btn-ghost:hover:not(:disabled){background-color:var(--bg-tertiary);color:var(--text-primary)}.btn-lg{padding:var(--spacing-md) var(--spacing-lg);font-size:1rem;border-radius:var(--radius-lg)}.btn-icon{width:40px;height:40px;padding:0;border-radius:var(--radius)}.card{background-color:var(--bg-primary);border-radius:var(--radius-lg);border:1px solid var(--border);padding:var(--spacing-lg);transition:all var(--transition)}@keyframes shake{0%,to{transform:translate(0)}20%{transform:translate(-4px)}40%{transform:translate(4px)}60%{transform:translate(-4px)}80%{transform:translate(4px)}}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.02)}}@keyframes fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.shake{animation:shake .4s ease-in-out}.pulse{animation:pulse .3s ease-in-out}.fade-in{animation:fadeIn .3s ease-out}.text-center{text-align:center}.text-secondary{color:var(--text-secondary)}.text-muted{color:var(--text-muted)}:focus-visible{outline:2px solid var(--native-primary);outline-offset:2px}::selection{background-color:var(--native-primary);color:#fff}@media (max-width: 640px){.korean-text{font-size:1.5rem}.korean-text-large{font-size:2rem}}.theme-toggle{display:flex;align-items:center;justify-content:center;width:36px;height:36px;padding:0;background-color:transparent;border:1px solid var(--border);border-radius:var(--radius);color:var(--text-secondary);cursor:pointer;transition:all var(--transition)}.theme-toggle:hover{background-color:var(--bg-tertiary);color:var(--text-primary);border-color:var(--border-light)}.theme-toggle-icon{display:flex;align-items:center;justify-content:center}.header{background-color:var(--bg-primary);border-bottom:1px solid var(--border);padding:var(--spacing-sm) var(--spacing-lg);position:sticky;top:0;z-index:100;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background-color:#ffffffe6;transition:background-color var(--transition),border-color var(--transition)}[data-theme=dark] .header{background-color:#1f2937e6}.header-content{max-width:1000px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:var(--spacing-md)}.header-title{display:flex;flex-direction:column;cursor:pointer;line-height:1.2;transition:opacity var(--transition)}.header-title:hover{opacity:.8}.header-korean{font-family:var(--font-korean);font-size:1.25rem;font-weight:600;color:var(--text-primary);letter-spacing:-.01em}.header-english{font-size:.6875rem;color:var(--text-muted);font-weight:500;letter-spacing:.02em}.header-nav{display:flex;align-items:center;gap:2px}.nav-btn{display:flex;flex-direction:column;align-items:center;gap:1px;padding:var(--spacing-xs) var(--spacing-sm);background:none;border:none;border-radius:var(--radius);cursor:pointer;transition:all var(--transition);color:var(--text-muted)}.nav-btn:hover{background-color:var(--bg-tertiary);color:var(--text-primary)}.nav-btn.active{background-color:var(--bg-tertiary);color:var(--native-primary)}.nav-icon{font-size:1.125rem;line-height:1}.nav-label{font-size:.5625rem;font-weight:500;text-transform:uppercase;letter-spacing:.03em;opacity:.9}@media (max-width: 768px){.header{padding:var(--spacing-sm) var(--spacing-md)}.header-content{gap:var(--spacing-sm)}.header-title{flex-direction:row;align-items:baseline;gap:var(--spacing-xs)}.header-korean{font-size:1.125rem}.header-english,.nav-label{display:none}.nav-btn{padding:var(--spacing-sm)}.nav-icon{font-size:1.25rem}}.home{max-width:720px;margin:0 auto;padding:var(--spacing-lg)}.home-hero{text-align:center;padding:var(--spacing-2xl) 0 var(--spacing-xl)}.home-title{margin-bottom:var(--spacing-sm)}.home-subtitle{color:var(--text-secondary);font-size:1rem;font-weight:400}.home-modes{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--spacing-md);margin-bottom:var(--spacing-xl)}.mode-card{display:flex;flex-direction:column;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-lg);background-color:var(--bg-primary);border:1px solid var(--border);border-radius:var(--radius-lg);cursor:pointer;transition:all var(--transition);text-align:center}.mode-card:hover{border-color:var(--text-muted);background-color:var(--bg-tertiary)}.mode-card:active{transform:scale(.98)}.mode-icon{font-size:2rem;line-height:1}.mode-title{font-size:1rem;font-weight:600;color:var(--text-primary)}.mode-description{font-size:.8125rem;color:var(--text-muted);line-height:1.4}.home-stats{background-color:var(--bg-primary);border:1px solid var(--border);border-radius:var(--radius-lg);padding:var(--spacing-lg);margin-bottom:var(--spacing-xl)}.home-stats h3{text-align:center;margin-bottom:var(--spacing-md);font-size:.6875rem;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.08em}.stats-grid{display:flex;justify-content:center;gap:var(--spacing-2xl)}.stat-item{display:flex;flex-direction:column;align-items:center}.stat-value{font-size:1.75rem;font-weight:700;color:var(--text-primary);letter-spacing:-.02em}.stat-label{font-size:.6875rem;font-weight:500;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em}.home-info{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--spacing-md)}.info-card{padding:var(--spacing-md);border-radius:var(--radius-lg);border:1px solid var(--border);background-color:var(--bg-primary)}.info-card h4{font-family:var(--font-korean);font-size:1rem;font-weight:600;margin-bottom:var(--spacing-xs);display:flex;align-items:baseline;gap:var(--spacing-sm)}.info-card h4 span{font-family:var(--font-latin);font-size:.6875rem;font-weight:500;color:var(--text-muted)}.info-card p{font-size:.8125rem;color:var(--text-secondary);line-height:1.5}.info-native{border-left:3px solid var(--native-primary)}.info-native h4{color:var(--native-primary)}.info-sino{border-left:3px solid var(--sino-primary)}.info-sino h4{color:var(--sino-primary)}@media (max-width: 640px){.home-modes,.home-info{grid-template-columns:1fr}.stats-grid{gap:var(--spacing-xl)}.stat-value{font-size:1.5rem}}.audio-btn{display:inline-flex;align-items:center;justify-content:center;background-color:var(--bg-tertiary);border:1px solid var(--border);border-radius:var(--radius);cursor:pointer;transition:all var(--transition);color:var(--text-secondary)}.audio-btn:hover:not(:disabled){background-color:var(--native-light);border-color:var(--native-primary);color:var(--native-primary)}.audio-btn:disabled{cursor:default}.audio-btn.playing{background-color:var(--native-light);border-color:var(--native-primary);color:var(--native-primary)}.audio-btn-small{width:28px;height:28px;font-size:.875rem}.audio-btn-medium{width:36px;height:36px;font-size:1rem}.audio-btn-large{width:44px;height:44px;font-size:1.25rem}.reference{max-width:900px;margin:0 auto;padding:var(--spacing-lg)}.reference-tabs{display:flex;justify-content:center;gap:var(--spacing-md);margin-bottom:var(--spacing-xl)}.tab-btn{display:flex;flex-direction:column;align-items:center;gap:2px;padding:var(--spacing-md) var(--spacing-xl);background-color:var(--bg-primary);border:2px solid var(--border);border-radius:var(--radius);cursor:pointer;transition:all .2s ease}.tab-btn:hover{border-color:var(--text-secondary)}.tab-native.active{background-color:var(--native-light);border-color:var(--native-primary)}.tab-sino.active{background-color:var(--sino-light);border-color:var(--sino-primary)}.tab-korean{font-family:var(--font-korean);font-size:1.25rem;font-weight:600}.tab-english{font-size:.75rem;color:var(--text-secondary)}.reference-content{animation:fadeIn .3s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.reference-note{text-align:center;color:var(--text-secondary);margin-bottom:var(--spacing-xl);font-size:1rem}.reference-section{margin-bottom:var(--spacing-xl)}.reference-section h3{font-size:1.125rem;margin-bottom:var(--spacing-sm);color:var(--text-primary)}.section-note{font-size:.875rem;color:var(--text-secondary);margin-bottom:var(--spacing-md)}.number-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:var(--spacing-md)}.examples-grid{grid-template-columns:repeat(auto-fill,minmax(160px,1fr))}.number-card{display:flex;flex-direction:column;align-items:center;gap:var(--spacing-xs);padding:var(--spacing-md);background-color:var(--bg-primary);border-radius:var(--radius);box-shadow:var(--shadow);transition:transform .2s ease}.number-card:hover{transform:translateY(-2px)}.card-native{border-top:3px solid var(--native-primary)}.card-sino{border-top:3px solid var(--sino-primary)}.number-value{font-size:1.5rem;font-weight:700;color:var(--text-primary)}.number-korean{font-size:1.25rem}.number-romanization{font-size:.75rem;color:var(--text-secondary);font-style:italic}@media (max-width: 640px){.reference-tabs{flex-direction:column;align-items:stretch}.tab-btn{flex-direction:row;justify-content:center;gap:var(--spacing-sm)}.number-grid{grid-template-columns:repeat(2,1fr)}.examples-grid{grid-template-columns:1fr}}.system-selector{display:flex;gap:var(--spacing-xs);justify-content:center;flex-wrap:wrap}.system-btn{display:flex;flex-direction:column;align-items:center;gap:2px;padding:var(--spacing-sm) var(--spacing-lg);background-color:var(--bg-primary);border:1px solid var(--border);border-radius:var(--radius);cursor:pointer;transition:all var(--transition);min-width:90px}.system-btn:hover{border-color:var(--text-muted)}.system-btn-native.active{background-color:var(--native-light);border-color:var(--native-primary)}.system-btn-native.active .system-label{color:var(--native-primary)}.system-btn-sino.active{background-color:var(--sino-light);border-color:var(--sino-primary)}.system-btn-sino.active .system-label{color:var(--sino-primary)}.system-btn-both.active{background-color:var(--bg-tertiary);border-color:var(--text-primary)}.system-label{font-family:var(--font-korean);font-size:1rem;font-weight:600;color:var(--text-primary)}.system-sublabel{font-size:.625rem;font-weight:500;color:var(--text-muted);text-transform:uppercase;letter-spacing:.03em}.system-btn.active .system-sublabel{opacity:.8}.flashcards{max-width:500px;margin:0 auto;padding:var(--spacing-lg)}.flashcards-header{text-align:center;margin-bottom:var(--spacing-xl)}.cards-reviewed{margin-top:var(--spacing-md);color:var(--text-muted);font-size:.8125rem}.flashcard-container{perspective:1000px;margin-bottom:var(--spacing-xl)}.flashcard{position:relative;width:100%;height:280px;cursor:pointer;transform-style:preserve-3d;transition:transform .5s cubic-bezier(.4,0,.2,1)}.flashcard.flipped{transform:rotateY(180deg)}.flashcard-front,.flashcard-back{position:absolute;width:100%;height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;backface-visibility:hidden;border-radius:var(--radius-xl);border:1px solid var(--border);background-color:var(--bg-primary);transition:border-color var(--transition),background-color var(--transition)}.flashcard-front{gap:var(--spacing-sm)}.flashcard-back{transform:rotateY(180deg)}.flashcard-native .flashcard-back{border-color:var(--native-primary);border-width:2px}.flashcard-sino .flashcard-back{border-color:var(--sino-primary);border-width:2px}.flashcard-number{font-size:4.5rem;font-weight:700;color:var(--text-primary);letter-spacing:-.02em}.flashcard-hint{margin-top:var(--spacing-sm);color:var(--text-muted);font-size:.8125rem}.flashcard-answer{display:flex;align-items:center;gap:var(--spacing-md)}.flashcard-romanization{margin-top:var(--spacing-sm);color:var(--text-secondary);font-size:1rem;font-style:italic}.flashcard-system-badge{position:absolute;bottom:var(--spacing-md);font-family:var(--font-korean);font-size:.75rem;font-weight:500;padding:var(--spacing-xs) var(--spacing-sm);border-radius:var(--radius)}.flashcards-actions{display:flex;justify-content:center}@media (max-width: 640px){.flashcard{height:240px}.flashcard-number{font-size:3.5rem}}.quiz{max-width:500px;margin:0 auto;padding:var(--spacing-lg)}.quiz-header{text-align:center;margin-bottom:var(--spacing-xl)}.direction-selector{display:flex;justify-content:center;gap:var(--spacing-xs);margin-top:var(--spacing-md)}.direction-btn{padding:var(--spacing-sm) var(--spacing-md);background:var(--bg-primary);border:1px solid var(--border);border-radius:var(--radius);cursor:pointer;transition:all var(--transition);font-family:var(--font-korean);color:var(--text-secondary)}.direction-btn:hover{border-color:var(--text-muted);color:var(--text-primary)}.direction-btn.active{background-color:var(--text-primary);border-color:var(--text-primary);color:var(--bg-primary)}.direction-icon{font-size:.8125rem}.difficulty-selector{display:flex;justify-content:center;gap:var(--spacing-xs);margin-top:var(--spacing-md);margin-bottom:var(--spacing-md)}.difficulty-btn{padding:var(--spacing-xs) var(--spacing-md);background:var(--bg-primary);border:1px solid var(--border);border-radius:var(--radius);font-size:.8125rem;cursor:pointer;transition:all var(--transition);color:var(--text-secondary)}.difficulty-btn:hover:not(:disabled){border-color:var(--text-muted);color:var(--text-primary)}.difficulty-btn.active{background-color:var(--text-primary);border-color:var(--text-primary);color:var(--bg-primary)}.difficulty-btn:disabled{opacity:.4;cursor:not-allowed}.quiz-stats{display:flex;justify-content:center;gap:var(--spacing-xl)}.stat{display:flex;flex-direction:column;align-items:center}.stat-value{font-size:1.25rem;font-weight:700;color:var(--text-primary);letter-spacing:-.01em}.stat-label{font-size:.625rem;font-weight:500;color:var(--text-muted);text-transform:uppercase;letter-spacing:.03em}.quiz-question{margin-bottom:var(--spacing-lg)}.question-card{position:relative;display:flex;align-items:center;justify-content:center;height:140px;border-radius:var(--radius-xl);background-color:var(--bg-primary);border:1px solid var(--border);transition:border-color var(--transition)}.question-native{border-color:var(--native-primary);border-width:2px}.question-sino{border-color:var(--sino-primary);border-width:2px}.question-number{font-size:3.5rem;font-weight:700;letter-spacing:-.02em}.question-korean-container{display:flex;align-items:center;gap:var(--spacing-md)}.question-korean{font-size:2rem}.option-number{font-size:1.75rem;font-weight:700;letter-spacing:-.01em}.quiz-result-info{text-align:center;margin-bottom:var(--spacing-md)}.result-romanization{color:var(--text-secondary);font-style:italic;font-size:1rem}.system-badge{position:absolute;top:var(--spacing-sm);right:var(--spacing-sm);font-family:var(--font-korean);font-size:.6875rem;font-weight:500;padding:var(--spacing-xs) var(--spacing-sm);border-radius:var(--radius)}.badge-native{background-color:var(--native-light);color:var(--native-primary)}.badge-sino{background-color:var(--sino-light);color:var(--sino-primary)}.quiz-options{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--spacing-sm);margin-bottom:var(--spacing-lg)}.option-wrapper{position:relative}.option-wrapper .audio-btn{position:absolute;top:var(--spacing-xs);right:var(--spacing-xs);z-index:1}.option-btn{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--spacing-xs);padding:var(--spacing-md);min-height:90px;width:100%;background-color:var(--bg-primary);border:1px solid var(--border);border-radius:var(--radius-lg);cursor:pointer;transition:all var(--transition)}.option-btn:hover:not(:disabled){border-color:var(--text-muted);background-color:var(--bg-tertiary)}.option-btn:disabled{cursor:default}.option-btn.correct{border-color:var(--correct);border-width:2px;background-color:var(--sino-light)}.option-btn.incorrect{border-color:var(--incorrect);border-width:2px;background-color:#dc26261a;animation:shake .4s ease}.option-korean{font-size:1.25rem}.option-romanization{font-size:.75rem;color:var(--text-muted)}.quiz-actions{display:flex;justify-content:center}@media (max-width: 480px){.quiz-options{grid-template-columns:1fr}.option-btn{min-height:72px}.question-number{font-size:3rem}}.typing{max-width:600px;margin:0 auto;padding:var(--spacing-lg)}.typing-header{text-align:center;margin-bottom:var(--spacing-xl)}.mode-selector{display:flex;justify-content:center;gap:var(--spacing-xs);margin-top:var(--spacing-md)}.mode-btn{padding:var(--spacing-sm) var(--spacing-md);background:none;border:1px solid var(--border);border-radius:999px;font-size:.875rem;cursor:pointer;transition:all .2s ease}.mode-btn:hover{border-color:var(--native-primary)}.mode-btn.active{background-color:var(--native-primary);border-color:var(--native-primary);color:#fff}.streak-badge{display:inline-block;margin-top:var(--spacing-md);padding:var(--spacing-xs) var(--spacing-md);background-color:#fef3c7;border-radius:999px;font-weight:600;color:#d97706}.typing-question{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--spacing-md);min-height:180px;padding:var(--spacing-xl);background-color:var(--bg-primary);border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:var(--spacing-xl)}.typing-question.question-native{border:3px solid var(--native-primary)}.typing-question.question-sino{border:3px solid var(--sino-primary)}.question-number-large{font-size:4rem;font-weight:700}.system-badge{position:absolute;top:var(--spacing-sm);right:var(--spacing-sm);font-family:var(--font-korean);font-size:.75rem;padding:var(--spacing-xs) var(--spacing-sm);border-radius:999px}.badge-native{background-color:var(--native-primary);color:#fff}.badge-sino{background-color:var(--sino-primary);color:#fff}.typing-form{display:flex;flex-direction:column;gap:var(--spacing-md);align-items:center}.typing-input{width:100%;max-width:400px;padding:var(--spacing-md);font-size:1.5rem;text-align:center;border:2px solid var(--border);border-radius:var(--radius);outline:none;transition:all .2s ease}.typing-input:focus{border-color:var(--native-primary);box-shadow:0 0 0 3px var(--native-light)}.typing-input.correct{border-color:var(--correct);background-color:#dcfce7}.typing-input.incorrect{border-color:var(--incorrect);background-color:#fee2e2}.typing-input[type=number]::-webkit-inner-spin-button,.typing-input[type=number]::-webkit-outer-spin-button{-webkit-appearance:none;margin:0}.typing-input[type=number]{-moz-appearance:textfield}.typing-result{display:flex;flex-direction:column;align-items:center;gap:var(--spacing-md);padding:var(--spacing-lg);border-radius:var(--radius);margin-top:var(--spacing-md)}.typing-result.correct{background-color:#dcfce7}.typing-result.incorrect{background-color:#fee2e2}.result-icon{font-size:1.25rem;font-weight:600}.result-correct .result-icon{color:var(--correct)}.result-incorrect .result-icon{color:var(--incorrect)}.result-incorrect{display:flex;flex-direction:column;align-items:center;gap:var(--spacing-sm)}.correct-answer{display:flex;flex-direction:column;align-items:center;gap:var(--spacing-xs)}.correct-answer strong{font-size:1.25rem}.speed{max-width:600px;margin:0 auto;padding:var(--spacing-lg)}.speed-header{text-align:center;margin-bottom:var(--spacing-xl)}.speed-start{text-align:center}.speed-info{background-color:var(--bg-primary);border-radius:var(--radius);padding:var(--spacing-xl);margin-bottom:var(--spacing-xl);box-shadow:var(--shadow)}.speed-info h2{font-size:1.5rem;margin-bottom:var(--spacing-sm)}.speed-info p{color:var(--text-secondary);margin-bottom:var(--spacing-lg)}.high-score-display{display:flex;justify-content:center;align-items:center;gap:var(--spacing-sm);font-size:1.125rem}.high-score-display strong{font-size:1.5rem;color:var(--native-primary)}.start-btn{padding:var(--spacing-lg) var(--spacing-xl);font-size:1.25rem}.speed-stats{display:flex;justify-content:center;align-items:center;gap:var(--spacing-xl);margin-bottom:var(--spacing-lg)}.speed-timer{text-align:center}.timer-value{font-size:2.5rem;font-weight:700;font-variant-numeric:tabular-nums;color:var(--text-primary)}.timer-value.low{color:var(--incorrect);animation:pulse .5s ease infinite}.speed-score{display:flex;flex-direction:column;align-items:center}.score-value{font-size:2.5rem;font-weight:700;color:var(--native-primary)}.score-label{font-size:.75rem;color:var(--text-secondary);text-transform:uppercase}.speed-question{display:flex;align-items:center;justify-content:center;height:120px;background-color:var(--bg-primary);border-radius:var(--radius);margin-bottom:var(--spacing-lg);box-shadow:var(--shadow)}.speed-question.question-native{border:3px solid var(--native-primary)}.speed-question.question-sino{border:3px solid var(--sino-primary)}.speed-question .question-number{font-size:3.5rem;font-weight:700}.speed-options{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--spacing-md)}.speed-option-btn{padding:var(--spacing-lg);background-color:var(--bg-primary);border:2px solid var(--border);border-radius:var(--radius);cursor:pointer;transition:all .15s ease}.speed-option-btn:hover{border-color:var(--native-primary);background-color:var(--native-light);transform:scale(1.02)}.speed-option-btn:active{transform:scale(.98)}.speed-option-btn .option-korean{font-size:1.5rem}.speed-finished{text-align:center}.finished-content{background-color:var(--bg-primary);border-radius:var(--radius);padding:var(--spacing-xl);margin-bottom:var(--spacing-xl);box-shadow:var(--shadow)}.new-high-score{font-size:1.5rem;font-weight:700;color:#d97706;margin-bottom:var(--spacing-lg);animation:pulse .5s ease infinite}.final-score{display:flex;flex-direction:column;align-items:center;margin-bottom:var(--spacing-md)}.final-score-value{font-size:5rem;font-weight:700;color:var(--native-primary);line-height:1}.final-score-label{font-size:1.25rem;color:var(--text-secondary);text-transform:uppercase}.score-comparison{color:var(--text-secondary)}@media (max-width: 480px){.speed-options{grid-template-columns:1fr}.speed-option-btn{padding:var(--spacing-md)}}.app{min-height:100vh;display:flex;flex-direction:column}.main-content{flex:1;padding-bottom:var(--spacing-xl)}