*{margin:0;padding:0;box-sizing:border-box}:root{--bg-primary: #e8e0f0;--bg-secondary: #f5f0fa;--color-hint: #ffffff;--color-hint-border: #aaa;--color-empty: #b8a9d4;--color-filled: #d4c8e8;--color-correct: #6ecf6e;--color-selected: #ffd700;--color-text: #333;--cell-size: 48px;--cell-gap: 2px;--font-cell: 1.4rem;--bank-char-size: 44px}body{font-family:PingFang TC,Microsoft JhengHei,Noto Sans TC,sans-serif;background:var(--bg-primary);color:var(--color-text);min-height:100dvh;display:flex;justify-content:center;overflow-x:hidden}#app{width:100%;max-width:480px;display:flex;flex-direction:column;min-height:100dvh}.screen{display:flex;flex-direction:column;flex:1}.screen.hidden{display:none}.toolbar{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;background:var(--bg-secondary);border-bottom:1px solid #ddd}.toolbar .level-title{font-size:1.1rem;font-weight:600}.toolbar button{background:none;border:1px solid #ccc;border-radius:8px;padding:6px 14px;font-size:.9rem;cursor:pointer;font-family:inherit}.toolbar button:active{background:#ddd}.overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:100}.overlay.hidden{display:none}.victory-content{background:#fff;border-radius:16px;padding:32px 24px;text-align:center;max-width:360px;width:90%;max-height:80vh;overflow-y:auto}.victory-character{width:120px;height:120px;object-fit:contain;margin:0 auto 8px;display:block;border-radius:12px}.victory-content h2{font-size:1.5rem;margin-bottom:16px}.idiom-definitions{text-align:left;margin-bottom:20px}.idiom-definitions .idiom-def{margin-bottom:12px}.idiom-definitions .idiom-def .idiom-name{font-weight:700;font-size:1.1rem;color:#4a3d8f}.idiom-definitions .idiom-def .idiom-meaning{font-size:.9rem;color:#666;margin-top:2px}.btn-next{background:#6c5ce7;color:#fff;border:none;border-radius:12px;padding:12px 32px;font-size:1.1rem;cursor:pointer;font-family:inherit}.btn-next:active{background:#5a4bd6}.title-row{display:flex;align-items:center;justify-content:center;gap:12px;padding:12px 16px 0}.btn-lang{background:none;border:1px solid #ccc;border-radius:8px;padding:4px 10px;font-size:.8rem;cursor:pointer;font-family:inherit;white-space:nowrap}.btn-lang:active{background:#ddd}.jump-bar{display:flex;gap:8px;padding:12px 16px 0;justify-content:center}.jump-bar input{width:140px;padding:8px 12px;border:2px solid #ddd;border-radius:8px;font-size:.9rem;font-family:inherit;text-align:center}.jump-bar input:focus{outline:none;border-color:#4a3d8f}.jump-bar button{padding:8px 16px;background:#4a3d8f;color:#fff;border:none;border-radius:8px;font-size:.9rem;cursor:pointer;font-family:inherit}.jump-bar button:active{background:#3a2d7f}@media(max-width:380px){:root{--cell-size: 40px;--font-cell: 1.2rem;--bank-char-size: 38px}}@media(min-width:500px){:root{--cell-size: 56px;--font-cell: 1.6rem;--bank-char-size: 50px}}.grid-container{flex:1;display:flex;align-items:center;justify-content:center;padding:16px;overflow:auto}.grid{display:grid;gap:var(--cell-gap)}.cell{width:var(--cell-size);height:var(--cell-size);display:flex;align-items:center;justify-content:center;font-size:var(--font-cell);font-weight:700;border-radius:6px;cursor:default;-webkit-user-select:none;user-select:none;transition:background-color .2s,transform .15s}.cell--empty{display:none}.cell--hint{background:var(--color-hint);border:2px solid var(--color-hint-border);color:var(--color-text)}.cell--blank{background:var(--color-empty);border:2px solid transparent;cursor:pointer}.cell--blank:active{transform:scale(.95)}.cell--blank.selected{border-color:var(--color-selected);box-shadow:0 0 8px #ffd70099}.cell--filled{background:var(--color-filled);border:2px solid #c0b0e0;color:var(--color-text);cursor:pointer}.cell--wrong{background:#f06060;border:2px solid #d94444;color:#fff;cursor:pointer}.cell--correct{background:var(--color-correct);border:2px solid #4baf4b;color:#fff;cursor:default}.cell.drop-target{border-color:var(--color-selected);box-shadow:0 0 10px #ffd700b3;transform:scale(1.08)}.char-bank{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;padding:16px;background:var(--bg-secondary);border-top:1px solid #ddd;min-height:80px}.char-btn{width:var(--bank-char-size);height:var(--bank-char-size);display:flex;align-items:center;justify-content:center;font-size:var(--font-cell);font-weight:700;background:#fff;border:2px solid #ccc;border-radius:8px;cursor:grab;user-select:none;-webkit-user-select:none;-webkit-touch-callout:none;touch-action:none;transition:background-color .15s,transform .15s,opacity .2s;font-family:inherit}.char-btn:active{transform:scale(.92)}.char-btn.selected{background:var(--color-selected);border-color:#e6be00;transform:scale(1.08)}.char-btn.used{opacity:.3;pointer-events:none}.drag-ghost{position:fixed;transform:translate(-50%,-50%);width:var(--bank-char-size);height:var(--bank-char-size);display:flex;align-items:center;justify-content:center;font-size:var(--font-cell);font-weight:700;background:var(--color-selected);border:2px solid #e6be00;border-radius:8px;box-shadow:0 4px 16px #00000040;z-index:200;pointer-events:none;opacity:.92}@keyframes pop-correct{0%{transform:scale(1)}50%{transform:scale(1.2)}to{transform:scale(1)}}@keyframes shake-wrong{0%,to{transform:translate(0)}20%{transform:translate(-4px)}40%{transform:translate(4px)}60%{transform:translate(-4px)}80%{transform:translate(4px)}}@keyframes fade-in-up{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.animate-correct{animation:pop-correct .4s ease}.animate-wrong{animation:shake-wrong .4s ease}.victory-content{animation:fade-in-up .4s ease;position:relative;z-index:1}.fireworks-canvas{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;pointer-events:none;z-index:0}#level-select h1{text-align:center;padding:24px 16px 0;color:#4a3d8f;font-size:1.6rem}.chapter-tabs{display:flex;gap:6px;padding:16px 16px 8px;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none}.chapter-tabs::-webkit-scrollbar{display:none}.chapter-tab{flex-shrink:0;display:flex;flex-direction:column;align-items:center;gap:2px;padding:6px 10px;border:2px solid #ddd;border-radius:10px;background:#fff;cursor:pointer;transition:all .15s;font-family:inherit}.chapter-avatar{width:36px;height:36px;border-radius:50%;object-fit:cover}.chapter-tab.active{border-color:#4a3d8f;background:#f0eeff}.chapter-tab:active{transform:scale(.96)}.chapter-label{font-size:.9rem;font-weight:600;color:#4a3d8f}.chapter-progress{font-size:.7rem;color:#999}.level-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(64px,1fr));gap:8px;padding:12px 16px;background-size:cover;background-position:center;background-repeat:no-repeat;border-radius:12px;margin:0 8px;position:relative}.level-grid:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:#e8e0f0d1;border-radius:12px;pointer-events:none}.level-card{background:#fff;border:2px solid #ddd;border-radius:10px;padding:10px 4px;text-align:center;cursor:pointer;transition:transform .15s,box-shadow .15s;font-family:inherit;position:relative;z-index:1}.level-card:active{transform:scale(.96)}.level-card.completed{border-color:var(--color-correct);background:#f0fff0}.level-card .level-number{font-size:1rem;font-weight:700;color:#4a3d8f}.level-card .level-status{font-size:.75rem;color:var(--color-correct);font-weight:600}.pagination-bar{display:flex;justify-content:center;align-items:center;gap:4px;padding:12px 16px 24px}.page-btn{min-width:36px;height:36px;border:1px solid #ddd;border-radius:8px;background:#fff;cursor:pointer;font-family:inherit;font-size:.9rem;color:#4a3d8f;transition:all .15s}.page-btn.active{background:#4a3d8f;color:#fff;border-color:#4a3d8f}.page-btn:disabled{opacity:.3;cursor:default}