:root{font-family:system-ui,Microsoft JhengHei,sans-serif}body{margin:0;background:#f5f5f5;color:#1a1a1a}.app{max-width:640px;margin:0 auto;padding:24px}.card-box{background:#fff;border-radius:16px;padding:18px 24px;text-align:center;box-shadow:0 2px 10px #00000014;margin:12px 0}.chinese{font-size:2rem;font-weight:700}.english{font-size:2.4rem;font-weight:700;color:#1558d6;margin-top:16px}.pattern{font-size:1.2rem;color:#666;margin-top:8px}button{font-size:1.3rem;padding:16px 20px;border:none;border-radius:12px;margin:8px;cursor:pointer;min-width:120px}.btn-good{background:#2e7d32;color:#fff}.btn-again{background:#ef6c00;color:#fff}.btn-dismiss{background:#eee;color:#555}.btn-speak{background:#0b8043;color:#fff;margin-top:12px}.btn-speak-sm{background:#0b8043;color:#fff;font-size:.95rem;padding:4px 10px;min-width:0;margin-left:8px}.example{margin-top:20px;padding-top:12px;border-top:1px solid #eee;text-align:left}.example-title{font-size:1rem;color:#999;margin-bottom:8px}.example-item{margin-bottom:14px}.example-en{font-size:1.5rem;color:#333;line-height:1.4}.example-zh{font-size:1.2rem;color:#777;margin-top:4px}.btn-primary{background:#1558d6;color:#fff;width:100%}input{font-size:1.3rem;padding:14px;width:100%;box-sizing:border-box;margin:8px 0;border:1px solid #ccc;border-radius:10px}.error{color:#c62828;font-size:1.1rem}.word{cursor:pointer;border-bottom:1px dashed #b0c4f5;-webkit-tap-highlight-color:transparent}.word:active{background:#dbe6ff}.collect-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000059;display:flex;align-items:center;justify-content:center;z-index:50}.collect-menu{background:#fff;border-radius:14px;padding:20px;width:80%;max-width:320px;text-align:center}.collect-menu button{display:block;width:100%;margin:8px 0}.collect-word{font-size:2rem;font-weight:700;margin-bottom:4px;word-break:break-word}.collect-sub{font-size:1.2rem;color:#666;margin-bottom:4px}.collect-trans{font-size:1.5rem;color:#1558d6;margin:6px 0 4px;min-height:1.5rem}.collect-saved{font-size:1.2rem;color:#2e7d32;font-weight:700;margin:12px 0}.tap-hint{font-size:.95rem;color:#999;margin-top:8px}.vocab-trans{font-size:1.1rem;color:#1558d6;font-weight:400}.toast{position:fixed;bottom:40px;left:50%;transform:translate(-50%);background:#000c;color:#fff;padding:10px 18px;border-radius:20px;z-index:60}.tabs{display:flex;gap:8px;margin:4px 0}.tab{flex:1;background:#eee;color:#555;margin:0;padding-top:8px;padding-bottom:8px}.tab.active{background:#1558d6;color:#fff}.vocab-item{text-align:left;padding:12px 20px;margin:8px 0}.vocab-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px}.vocab-word{font-size:1.4rem;font-weight:700}.vocab-sub{font-size:1rem;color:#666;margin-bottom:4px}.vocab-actions button{margin-left:6px}.ja-reading{font-size:1.8rem;color:#1558d6;margin-top:8px}.ja-romaji{font-size:1.3rem;color:#777;letter-spacing:1px}.langtabs{display:flex;gap:8px;margin:8px 0 0}.langtab{flex:1;background:#eee;color:#555;font-weight:700;margin:0;padding-top:8px;padding-bottom:8px}.langtab.active{background:#0b8043;color:#fff}.link-btn{background:none;border:none;color:#1558d6;text-decoration:underline;font-size:1rem;padding:6px;cursor:pointer}.version{text-align:center;color:#aaa;font-size:.85rem;margin:18px 0 8px;letter-spacing:.5px}.stats-strip{display:flex;align-items:center;gap:14px;margin:10px 0 2px}.streak{font-size:1.2rem;font-weight:700;color:#e65100;white-space:nowrap}.goal{flex:1;font-size:.95rem;color:#666}.goal-bar,.progress{height:12px;background:#e0e0e0;border-radius:6px;overflow:hidden}.goal-bar{margin-bottom:4px}.goal-fill,.progress-fill{height:100%;background:#2e7d32;border-radius:6px;transition:width .3s}.level-btn{min-width:72px;margin:4px;background:#eee;color:#555;font-size:1.1rem;padding:10px 12px}.level-btn.active{background:#1558d6;color:#fff}.lesson-top{display:flex;align-items:center;gap:10px;margin:10px 0 4px}.lesson-top .progress{flex:1}.lesson-top .link-btn{font-size:1.3rem;text-decoration:none;color:#999;min-width:0;margin:0}.q-title{font-size:1.3rem;font-weight:700;color:#444;margin:12px 4px 0}.q-box{padding:22px 20px}.options{display:flex;flex-direction:column}.opt{background:#fff;color:#1a1a1a;border:2px solid #ddd;margin:6px 0;font-size:1.4rem;padding:14px 16px;text-align:center}.opt:disabled{cursor:default;color:#1a1a1a}.opt.correct{border-color:#2e7d32;background:#e8f5e9}.opt.wrong{border-color:#ef6c00;background:#fff3e0}.btn-listen{background:#0b8043;color:#fff;font-size:2.6rem;width:110px;height:110px;border-radius:55px;padding:0;min-width:0}.cloze{font-size:1.6rem;line-height:1.6;color:#333}.blank{display:inline-block;min-width:80px;border-bottom:3px solid #1558d6;color:#1558d6;font-weight:700;padding:0 4px}.answer-line{min-height:64px;border-bottom:2px solid #ddd;margin-top:12px;display:flex;flex-wrap:wrap;justify-content:center}.tiles{display:flex;flex-wrap:wrap;justify-content:center;margin:10px 0}.tile{background:#fff;border:2px solid #ccc;color:#1a1a1a;min-width:0;margin:5px;padding:10px 14px;font-size:1.3rem}.tile:disabled{visibility:hidden}.answer-line .tile:disabled{visibility:visible;color:#1a1a1a}.correct-sentence{margin-top:10px;font-size:1.3rem;color:#2e7d32;font-weight:700}.btn-primary:disabled{background:#b0bec5}.feedback{position:sticky;bottom:0;margin:12px -8px 0;padding:14px 18px 8px;border-radius:16px 16px 0 0;text-align:center;box-shadow:0 -2px 10px #00000014}.feedback.ok{background:#e8f5e9}.feedback.bad{background:#fff3e0}.feedback-title{font-size:1.5rem;font-weight:700}.feedback.ok .feedback-title{color:#2e7d32}.feedback.bad .feedback-title{color:#e65100}.feedback-row{display:flex;gap:6px;margin:6px 0}.feedback-answer{flex:1;min-width:0;margin:0;padding:10px 12px;background:#fff;border:2px solid #cfd8dc;font-size:1.4rem;color:#1558d6;font-weight:700}.feedback-sentence{flex:0 0 auto;min-width:0;margin:0;padding:10px 12px;background:#0b8043;color:#fff;font-size:1.1rem}.opt-speak{font-size:1rem}.cloze .btn-speak-sm{vertical-align:middle}.feedback-zh{color:#555;font-weight:400;margin-left:10px}.feedback button.btn-good,.feedback button.btn-again{width:100%;margin:6px 0 2px}.summary-title{font-size:1.8rem;font-weight:700;color:#2e7d32}.summary-score{font-size:1.3rem;margin:8px 0;color:#444}.summary-score strong{font-size:1.8rem;color:#2e7d32}.summary-goal{font-size:1.3rem;color:#e65100;font-weight:700;margin-bottom:6px}.summary-words{text-align:left;margin:12px 0;border-top:1px solid #eee}.summary-word{display:flex;gap:10px;padding:8px 4px;border-bottom:1px solid #f0f0f0;cursor:pointer;font-size:1.15rem}.summary-fx{font-weight:700;color:#1558d6}.summary-zh{flex:1;color:#666}.sticky-bottom{position:sticky;bottom:0;padding:6px 0 4px;background:linear-gradient(#f5f5f500,#f5f5f5 30%)}.sticky-bottom .btn-primary{margin:0}.btn-hard{background:#f9a825;color:#fff}.feedback.mid{background:#fffde7}.feedback.mid .feedback-title{color:#f57f17}.feedback button.btn-hard{width:100%;margin:6px 0 2px}.summary-vague{font-size:1.1rem;color:#f57f17}.grade-row{display:flex;gap:6px}.grade-row button{flex:1;min-width:0;margin:4px 0;padding:14px 6px}.answer-line,.answer-line .tile{touch-action:none;user-select:none;-webkit-user-select:none}.dragging-line{background:#f5f9ff;border-radius:10px}.tile.dragging{border-color:#1558d6;background:#e3f2fd;transform:scale(1.1);box-shadow:0 4px 12px #1558d640}.drag-hint{font-size:.95rem;color:#999;margin-top:6px}