:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media(prefers-color-scheme:light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}.home-container{display:flex;flex-direction:column;justify-content:center;align-items:center;height:100vh;gap:2rem}.title{font-size:2.5rem;color:var(--primary-color);margin:0}.menu{display:flex;flex-direction:column;gap:1rem;width:100%;max-width:300px}.menu-btn{padding:1.5rem;font-size:1.2rem;font-weight:700;color:#fff;border-radius:12px;box-shadow:0 4px 6px #0000001a}.menu-btn.learn{background:linear-gradient(135deg,#6366f1,#a855f7)}.menu-btn.quiz{background:linear-gradient(135deg,#f43f5e,#fb923c)}.card{background:#fff;border-radius:20px;padding:2rem;box-shadow:0 10px 25px #0000001a;width:100%;max-width:320px;height:400px;display:flex;flex-direction:column;align-items:center;position:relative;transition:transform .3s ease;cursor:pointer;overflow:hidden}.card:hover{transform:translateY(-5px)}.card-header{width:100%;display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem}.level-badge{background:#e0e7ff;color:#4f46e5;padding:4px 10px;border-radius:20px;font-size:.9rem;font-weight:700}.favorite-btn{background:none;border:none;font-size:1.5rem;padding:0;color:#d1d5db;box-shadow:none}.favorite-btn.active{color:#fbbf24}.hanja-display{font-size:6rem;font-weight:700;margin:1rem 0;color:#1f2937}.card-details{display:flex;flex-direction:column;align-items:center;width:100%;opacity:0;transform:translateY(20px);transition:all .3s ease}.card-details.visible{opacity:1;transform:translateY(0)}.sound-meaning{font-size:1.5rem;margin-bottom:1.5rem}.sound{font-weight:700;margin-right:.5rem}.meaning{color:#6b7280}.examples{width:100%;background:#f9fafb;border-radius:12px;padding:1rem}.example-item{display:flex;justify-content:center;gap:.5rem;margin-bottom:.5rem;font-size:1.1rem}.example-item:last-child{margin-bottom:0}.hanja-sub{color:#9ca3af}.tap-hint{margin-top:auto;color:#9ca3af;animation:pulse 2s infinite}@keyframes pulse{0%{opacity:.5}50%{opacity:1}to{opacity:.5}}.learn-container{display:flex;flex-direction:column;height:100vh;box-sizing:border-box}.learn-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem}.back-btn{background:none;font-size:1.5rem;padding:5px;color:#6b7280}.controls{display:flex;gap:1rem}.toggle-label{font-size:.9rem;display:flex;align-items:center;gap:5px;cursor:pointer}.card-area{flex:1;display:flex;justify-content:center;align-items:center;perspective:1000px}.nav-controls{display:flex;justify-content:space-between;align-items:center;padding:1rem 0;margin-top:auto}.nav-controls button{background:var(--primary-color);color:#fff;width:100px;border-radius:50px}.nav-controls button:disabled{background:#d1d5db;cursor:not-allowed}.progress{font-weight:700;color:#6b7280}.quiz-setup-container{text-align:left}.setup-section{margin-bottom:2rem}.setup-section h2{font-size:1.2rem;color:#4b5563;margin-bottom:1rem}.mode-grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem}.mode-card{background:#fff;border:2px solid transparent;border-radius:12px;padding:1rem;text-align:left;transition:all .2s;box-shadow:0 2px 5px #0000000d;display:flex;flex-direction:column;justify-content:center}.mode-card:hover{transform:translateY(-2px)}.mode-card.selected{border-color:var(--primary-color);background:#eff6ff}.mode-card h3{margin:0 0 .5rem;font-size:1rem;color:#1f2937}.mode-card p{margin:0;font-size:.8rem;color:#6b7280}.count-options{display:flex;flex-wrap:wrap;gap:.5rem}.count-options button{background:#fff;color:#1f2937;border:1px solid #d1d5db;padding:8px 16px}.count-options button.selected{background:var(--primary-color);color:#fff;border-color:var(--primary-color)}.count-options input{padding:8px 12px;border:1px solid #d1d5db;border-radius:8px;width:80px}.count-options input.selected-input{border-color:var(--primary-color);outline:2px solid #a5b4fc}.start-btn{width:100%;padding:1.2rem;font-size:1.3rem;background:linear-gradient(135deg,#10b981,#059669);color:#fff;margin-top:1rem;box-shadow:0 4px 6px #0000001a;font-weight:700}.play-container{display:flex;flex-direction:column;height:100vh;padding:1rem;box-sizing:border-box;max-width:600px;margin:0 auto}.play-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem}.header-left{flex:1}.nav-btn{background:#fff;border:1px solid #e5e7eb;padding:8px 12px;border-radius:8px;font-size:1.2rem;color:#4b5563;box-shadow:0 2px 4px #0000000d}.nav-btn:disabled{background:#f3f4f6;color:#d1d5db;cursor:not-allowed;box-shadow:none}.stat-box{background:#fff;padding:.5rem 1rem;border-radius:12px;box-shadow:0 2px 4px #0000000d;font-weight:700;display:flex;flex-direction:column;align-items:center;font-size:.9rem;margin-left:10px}.stat-box .value{font-size:1.2rem;color:var(--primary-color)}.combo-box .value{color:#fca5a5;animation:bounce .5s infinite alternate}.time-box.urgent .value{color:red;animation:pulse .5s infinite}.question-card{background:#fff;border-radius:20px;padding:2rem;margin-bottom:2rem;min-height:150px;display:flex;justify-content:center;align-items:center;box-shadow:0 4px 6px #0000000d;transition:transform .3s ease}.question-card:hover{transform:translateY(-2px)}.hanja-big{font-size:6rem;font-weight:700;color:#1f2937}.hint-display{text-align:center}.hint-label{display:block;margin-bottom:1rem;color:#6b7280}.hint-row{font-size:1.5rem;margin-bottom:.5rem}.masked-hanja{color:#cbd5e1}.options-grid-unified{display:grid;grid-template-columns:1fr 1fr;gap:1rem}.unified-opt-btn{background:#fff;border:2px solid #e5e7eb;padding:1.5rem 1rem;border-radius:16px;display:flex;flex-direction:column;align-items:center;gap:5px;transition:all .2s cubic-bezier(.4,0,.2,1);box-shadow:0 4px 6px #0000000d;position:relative;overflow:hidden;cursor:pointer}.unified-opt-btn:hover{transform:translateY(-3px);box-shadow:0 10px 15px #0000001a;border-color:#a5b4fc}.unified-opt-btn:active{transform:scale(.98)}.opt-sound{font-size:1.8rem;font-weight:700;color:#1f2937}.opt-meaning{font-size:1rem;color:#6b7280}.unified-opt-btn.correct{background:#d1fae5!important;border-color:#10b981!important;color:#065f46!important}.unified-opt-btn.wrong{background:#fee2e2!important;border-color:#ef4444!important;color:#991b1b!important}.feedback-overlay{position:fixed;inset:0;display:flex;justify-content:center;align-items:center;z-index:100;animation:fadeIn .2s forwards}.correct-bg{background:#a7f3d0f2}.wrong-bg{background:#fecacaf2}.feedback-content{text-align:center;padding:2rem;width:80%;max-width:400px}.result-icon{font-size:3rem;font-weight:700;margin-bottom:1rem;color:#1f2937}.answer-reveal{margin-bottom:1.5rem}.answer-reveal .big-char{display:block;font-size:4rem;font-weight:700}.answer-reveal .info{font-size:1.5rem;color:#4b5563}.examples-reveal{background:#ffffff80;padding:1rem;border-radius:12px;margin-bottom:2rem;font-size:1.1rem}.next-btn{width:100%;padding:1rem;font-size:1.2rem;background:#1f2937;color:#fff;box-shadow:0 4px 6px #0000001a;border-radius:12px;cursor:pointer}@keyframes bounce{0%{transform:scale(1)}to{transform:scale(1.1)}}.result-container{display:flex;flex-direction:column;justify-content:center;align-items:center;height:100vh}.score-card{background:#fff;padding:3rem 2rem;border-radius:24px;box-shadow:0 10px 25px #0000001a;width:100%;margin-bottom:2rem;box-sizing:border-box}.score-value{font-size:4rem;font-weight:700;color:var(--primary-color);margin:1rem 0}.score-details{font-size:1.2rem;color:#6b7280}.action-buttons{display:flex;gap:1rem;width:100%;margin-bottom:1rem}.secondary-actions{margin-top:1rem}.action-buttons button{flex:1;padding:1rem;font-size:1.1rem;border-radius:12px;cursor:pointer;transition:transform .1s}.action-buttons button:active{transform:scale(.98)}.retry-wrong-btn{background:linear-gradient(135deg,#f59e0b,#d97706);color:#fff;font-weight:700;box-shadow:0 4px 6px #f59e0b4d;border:none}.restart-btn{background:var(--primary-color);color:#fff;border:none}.home-btn{background:#fff;color:#4b5563;border:2px solid #e5e7eb}:root{--primary-color: #4f46e5;--secondary-color: #ec4899;--bg-color: #f3f4f6;--card-bg: #ffffff;--text-color: #1f2937}#root{width:100%;max-width:600px;margin:0 auto;display:flex;flex-direction:column;justify-content:center;min-height:100vh}body{margin:0;font-family:Inter,sans-serif;background:linear-gradient(135deg,#e0f2fe,#dbeafe);color:var(--text-color);-webkit-font-smoothing:antialiased;min-height:100vh;display:flex;justify-content:center}.page-container{padding:20px;width:100%;box-sizing:border-box;text-align:center}button{cursor:pointer;border:none;border-radius:8px;padding:10px 20px;font-size:1rem;transition:transform .1s}button:active{transform:scale(.98)}