.stats{display:flex;justify-content:center;margin-bottom:30px;padding:20px;background:#faf8f6;border-radius:8px;border:1px solid #e8e3dd}.stat-item{text-align:center}.stat-label{font-size:.75em;color:#9a8a7a;margin-bottom:5px;font-weight:300}.stat-value{font-size:1.8em;font-weight:400;color:#5a4a3a}.level-selector{margin-bottom:30px;text-align:center}.level-btn{padding:10px 24px;margin:5px;border:1px solid #c9b8a8;background:#fff;color:#5a4a3a;border-radius:20px;cursor:pointer;font-size:.9em;transition:all .2s ease}.level-btn:hover{background:#faf8f6;border-color:#8b7355}.level-btn.active{background:#8b7355;color:#fff;border-color:#8b7355}.question-area{margin-bottom:30px}.context{font-size:.85em;color:#9a8a7a;margin-bottom:10px;font-style:italic}.japanese-sentence{font-size:1.2em;color:#333;margin-bottom:20px;padding:20px;background:#fff9f3;border-radius:8px;border-left:3px solid #c9b8a8}.area-label{margin-bottom:10px;color:#8b7355;font-weight:400;font-size:.9em}.word-pool{display:flex;flex-wrap:wrap;gap:10px;padding:20px;background:#faf8f6;border-radius:8px;min-height:80px;margin-bottom:20px;border:1px solid #e8e3dd}.word-chip{padding:10px 20px;background:#fff;border:1px solid #c9b8a8;border-radius:16px;cursor:pointer;transition:all .2s ease;user-select:none;color:#5a4a3a}.word-chip:hover{transform:translateY(-1px);box-shadow:0 2px 4px rgba(0,0,0,.08)}.answer-area{display:flex;flex-wrap:wrap;gap:10px;padding:20px;background:#f0ede8;border-radius:8px;min-height:80px;margin-bottom:20px;border:1px dashed #c9b8a8}.answer-chip{padding:10px 20px;background:#8b7355;color:#fff;border-radius:16px;cursor:pointer;transition:all .2s ease;user-select:none}.answer-chip:hover{background:#7a6448}.controls{display:flex;gap:10px;justify-content:center;margin-bottom:20px;flex-wrap:wrap}.btn{padding:12px 28px;border:none;border-radius:20px;cursor:pointer;font-size:.95em;transition:all .2s ease;font-weight:400}.btn-primary{background:#8b7355;color:#fff}.btn-primary:hover{background:#7a6448}.btn-secondary{background:#c9b8a8;color:#fff}.btn-secondary:hover{background:#b8a798}.btn-hint{background:#d4c5b3;color:#5a4a3a}.btn-hint:hover{background:#c9b8a8}.btn-reload{background:#9a8a7a;color:#fff}.btn-reload:hover{background:#8a7a6a}.feedback{padding:20px;border-radius:8px;margin-bottom:20px;text-align:center;font-size:1.05em;border:1px solid}.feedback.correct{background:#f5ede5;color:#5a4a3a;border-color:#d4c5b3}.feedback.incorrect{background:#f5ede5;color:#5a4a3a;border-color:#d4c5b3}.correct-answer{margin-top:10px;padding:15px;background:#fff;border-radius:6px;font-weight:400}.hint{padding:15px;background:#fff9f3;border-radius:8px;margin-bottom:20px;border-left:3px solid #d4c5b3;color:#5a4a3a}.hint-pattern{font-weight:500;font-size:1.1em;margin-bottom:5px}.hint-detail{font-size:.9em;color:#8b7355}.loading{text-align:center;padding:40px;font-size:1.1em;color:#8b7355}.error{text-align:center;padding:40px;color:#6a4a4a;background:#faf5f5;border-radius:8px;margin:20px 0;border:1px solid #d4c5c5}.hidden{display:none}@media (max-width:768px){.container{padding:20px}h1{font-size:1.5em}.level-btn{padding:8px 16px;font-size:.85em}.japanese-sentence{font-size:1.1em}.answer-chip,.word-chip{padding:8px 16px;font-size:.9em}.btn{padding:10px 20px;font-size:.9em}.stats{flex-direction:column;gap:15px}}