.omni-puzzle-game-container{max-width:1200px;margin:0 auto;padding:20px}.omni-puzzle-toolbar{display:flex;align-items:center;justify-content:space-between;gap:clamp(1rem, 3vw, 2.5rem);font-size:clamp(1.1rem, 2.6vw, 1.6rem);user-select:none;margin-bottom:20px}.omni-puzzle-controls-left{display:flex;align-items:center;gap:10px;flex-wrap:wrap;justify-content:flex-start}.omni-puzzle-controls-right{display:flex;align-items:center;gap:10px;flex-wrap:wrap;justify-content:flex-end}.omni-puzzle-controls-left label{font-weight:600;font-size:16px}#omni-puzzle-pieces-select{padding:8px 12px;font-size:16px;border:2px solid #333;border-radius:4px;background:#fff;cursor:pointer}.omni-puzzle-btn{padding:10px 20px;font-size:16px;font-weight:600;background:#4f883d;color:#fff;border:none;border-radius:4px;cursor:pointer;transition:background 0.3s ease}.omni-puzzle-btn:hover{background:#3e6c31}.omni-puzzle-timer{font-size:18px;font-weight:700;color:#333;text-align:center;white-space:nowrap}#fullscreen-wrapper{display:flex;align-items:center}.omni-puzzle-canvas-wrapper{max-width:1000px;margin:0 auto;width:100%}#omni-puzzle-canvas{border:3px solid #333;display:block;width:100%;height:auto;background:#f5f5f5;cursor:grab;touch-action:none;box-sizing:border-box}#omni-puzzle-canvas:active{cursor:grabbing}.omni-puzzle-teacher-desc{max-width:1200px;margin:0 auto 20px;color:#000;font-size:16px;line-height:1.6}.omni-puzzle-admin-note{max-width:1200px;margin:30px auto 0;color:#000;font-size:15px;line-height:1.6}.omni-puzzle-preview{max-width:1200px;margin:20px auto;text-align:center;display:flex;flex-direction:column;align-items:center;gap:12px;position:relative}.omni-puzzle-preview-inner{position:relative;display:inline-flex;align-items:center;justify-content:center}.omni-puzzle-preview-controls{display:flex;align-items:center;justify-content:center;gap:12px;padding:6px 12px;border-radius:999px;background:#f1f5f9;box-shadow:0 1px 4px rgb(15 23 42 / .18);z-index:1}.omni-puzzle-preview-zoom-btn{width:38px;height:38px;border-radius:50%;border:1px solid rgb(15 23 42 / .12);background:#fff;color:#111827;font-size:22px;font-weight:600;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;transition:background 0.2s ease,color 0.2s ease,transform 0.2s ease,border-color 0.2s ease}.omni-puzzle-preview-zoom-btn:hover{background:#2563eb;border-color:#1d4ed8;color:#fff;transform:translateY(-1px)}.omni-puzzle-preview-zoom-btn:active{transform:scale(.94)}.omni-puzzle-preview-zoom-btn:disabled{cursor:not-allowed;opacity:.55;background:#e2e8f0;color:#475569;border-color:rgb(71 85 105 / .35)}.omni-puzzle-preview-img{width:200px;height:auto;border:2px solid #333;border-radius:4px;box-shadow:0 2px 8px rgb(0 0 0 / .1);transition:width 0.2s ease,height 0.2s ease}.omni-puzzle-hidden-helper{max-width:1200px;margin:24px auto 0;text-align:center;display:flex;flex-direction:column;align-items:center;gap:10px;color:#1f2937}.omni-puzzle-hidden-title{font-weight:600;font-size:16px}.omni-puzzle-hidden-btn{display:inline-block;padding:.75em 1.5em;background:#2270b8;color:#fff;border:none;border-radius:.5em;font-size:1rem;font-weight:600;line-height:1.2;text-align:center;cursor:pointer;transition:background 0.2s ease,transform 0.2s ease,box-shadow 0.2s ease;box-shadow:0 4px 12px rgb(34 112 184 / .25)}.omni-puzzle-hidden-btn:hover{background:#1a5a9a;transform:translateY(-2px);box-shadow:0 6px 16px rgb(34 112 184 / .35)}.omni-puzzle-hidden-btn:active{transform:translateY(0);box-shadow:0 3px 8px rgb(34 112 184 / .25)}.omni-puzzle-hidden-hint{font-size:14px;color:#6b7280;max-width:420px}.omni-puzzle-game-container:fullscreen{background:#fff;display:flex;flex-direction:column;justify-content:center;align-items:center;padding:20px}.omni-puzzle-game-container:fullscreen .omni-puzzle-toolbar{background:rgb(255 255 255 / .95);padding:15px 20px;border-radius:8px;width:90%;max-width:1000px;margin-bottom:20px}.omni-puzzle-game-container:fullscreen .omni-puzzle-canvas-wrapper{max-width:90%;max-height:calc(100vh - 150px);display:flex;justify-content:center}.omni-puzzle-game-container:fullscreen #omni-puzzle-canvas{max-height:calc(100vh - 150px);width:auto;max-width:100%}.omni-puzzle-game-container:fullscreen .omni-puzzle-preview{position:fixed;top:20px;right:20px;margin:0;z-index:10000;background:rgb(255 255 255 / .96);padding:16px;border-radius:12px;box-shadow:0 6px 18px rgb(15 23 42 / .35);gap:16px}.omni-puzzle-game-container:fullscreen .omni-puzzle-preview-controls{position:absolute;top:16px;right:16px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;padding:8px;border-radius:999px;background:rgb(15 23 42 / .72);box-shadow:0 6px 16px rgb(15 23 42 / .45);z-index:2}.omni-puzzle-game-container:fullscreen .omni-puzzle-preview-img{width:250px;max-width:none;max-height:none;object-fit:contain}.omni-puzzle-game-container:fullscreen .omni-puzzle-preview-zoom-btn{background:rgb(255 255 255 / .95);border-color:rgb(148 163 184 / .35);color:#0f172a}.omni-puzzle-game-container:fullscreen .omni-puzzle-preview-zoom-btn:hover{background:#38bdf8;border-color:#0ea5e9;color:#0f172a}.omni-puzzle-game-container:-webkit-full-screen{background:#fff;display:flex;flex-direction:column;justify-content:center;align-items:center;padding:20px}.omni-puzzle-game-container:-webkit-full-screen .omni-puzzle-toolbar{background:rgb(255 255 255 / .95);padding:15px 20px;border-radius:8px;width:90%;max-width:1000px;margin-bottom:20px}.omni-puzzle-game-container:-webkit-full-screen .omni-puzzle-canvas-wrapper{max-width:90%;max-height:calc(100vh - 150px);display:flex;justify-content:center}.omni-puzzle-game-container:-webkit-full-screen #omni-puzzle-canvas{max-height:calc(100vh - 150px);width:auto;max-width:100%}.omni-puzzle-game-container:-webkit-full-screen .omni-puzzle-preview{position:fixed;top:20px;right:20px;margin:0;z-index:10000;background:rgb(255 255 255 / .96);padding:16px;border-radius:12px;box-shadow:0 6px 18px rgb(15 23 42 / .35);gap:16px}.omni-puzzle-game-container:-webkit-full-screen .omni-puzzle-preview-controls{position:absolute;top:16px;right:16px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;padding:8px;border-radius:999px;background:rgb(15 23 42 / .72);box-shadow:0 6px 16px rgb(15 23 42 / .45);z-index:2}.omni-puzzle-game-container:-webkit-full-screen .omni-puzzle-preview-img{width:250px;max-width:none;max-height:none;object-fit:contain}.omni-puzzle-game-container:-webkit-full-screen .omni-puzzle-preview-zoom-btn{background:rgb(255 255 255 / .95);border-color:rgb(148 163 184 / .35);color:#0f172a}.omni-puzzle-game-container:-webkit-full-screen .omni-puzzle-preview-zoom-btn:hover{background:#38bdf8;border-color:#0ea5e9;color:#0f172a}.omni-puzzle-game-container:-moz-full-screen{background:#fff;display:flex;flex-direction:column;justify-content:center;align-items:center;padding:20px}.omni-puzzle-game-container:-moz-full-screen .omni-puzzle-toolbar{background:rgb(255 255 255 / .95);padding:15px 20px;border-radius:8px;width:90%;max-width:1000px;margin-bottom:20px}.omni-puzzle-game-container:-moz-full-screen .omni-puzzle-canvas-wrapper{max-width:90%;max-height:calc(100vh - 150px);display:flex;justify-content:center}.omni-puzzle-game-container:-moz-full-screen #omni-puzzle-canvas{max-height:calc(100vh - 150px);width:auto;max-width:100%}.omni-puzzle-game-container:-moz-full-screen .omni-puzzle-preview{position:fixed;top:20px;right:20px;margin:0;z-index:10000;background:rgb(255 255 255 / .96);padding:16px;border-radius:12px;box-shadow:0 6px 18px rgb(15 23 42 / .35);gap:16px}.omni-puzzle-game-container:-moz-full-screen .omni-puzzle-preview-controls{position:absolute;top:16px;right:16px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;padding:8px;border-radius:999px;background:rgb(15 23 42 / .72);box-shadow:0 6px 16px rgb(15 23 42 / .45);z-index:2}.omni-puzzle-game-container:-moz-full-screen .omni-puzzle-preview-img{width:250px;max-width:none;max-height:none;object-fit:contain}.omni-puzzle-game-container:-moz-full-screen .omni-puzzle-preview-zoom-btn{background:rgb(255 255 255 / .95);border-color:rgb(148 163 184 / .35);color:#0f172a}.omni-puzzle-game-container:-moz-full-screen .omni-puzzle-preview-zoom-btn:hover{background:#38bdf8;border-color:#0ea5e9;color:#0f172a}.omni-puzzle-popup{position:fixed;top:0;left:0;width:100%;height:100%;background:rgb(0 0 0 / .8);display:flex;justify-content:center;align-items:center;z-index:9999;opacity:0;transition:opacity 0.3s ease}.omni-puzzle-popup.show{opacity:1}.omni-puzzle-popup-content{background:#fff;padding:40px;border-radius:12px;text-align:center;max-width:500px;width:90%;box-shadow:0 10px 40px rgb(0 0 0 / .3);transform:scale(.7);transition:transform 0.3s ease}.omni-puzzle-popup.show .omni-puzzle-popup-content{transform:scale(1)}.omni-puzzle-popup-content h2{font-size:32px;color:#4CAF50;margin:0 0 20px 0}.omni-puzzle-popup-content p{font-size:18px;color:#333;margin:10px 0}.omni-puzzle-popup-content .omni-puzzle-time{font-size:24px;font-weight:700;color:#2196F3;margin:20px 0}.omni-puzzle-popup-content .omni-puzzle-btn{margin-top:20px;min-width:150px}.omni-puzzle-popup-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:20px}.omni-puzzle-btn-outline{background:#fff;color:#4f883d;border:2px solid #4f883d}.omni-puzzle-btn-outline:hover{background:#3e6c31;color:#fff}.omni-puzzle-summary{background:#f5f7fb;border-radius:10px;padding:18px;margin-top:20px;text-align:left;line-height:1.5}.omni-puzzle-summary p{margin:6px 0;font-size:16px}@media (max-width:768px){.omni-puzzle-toolbar{grid-template-columns:1fr;grid-template-rows:auto auto auto;text-align:center}.omni-puzzle-controls-left,.omni-puzzle-controls-right{justify-content:center;width:100%}.omni-puzzle-timer{order:2}.omni-puzzle-btn{flex:1;min-width:120px}.omni-puzzle-popup-content{padding:30px 20px}.omni-puzzle-popup-content h2{font-size:24px}.omni-puzzle-popup-content p{font-size:16px}.omni-puzzle-popup-content .omni-puzzle-time{font-size:20px}}@media (max-width:480px){.omni-puzzle-game-container{padding:10px}.omni-puzzle-controls-left label{font-size:14px}.omni-puzzle-btn{font-size:14px;padding:8px 12px}.omni-puzzle-timer{font-size:16px}.omni-puzzle-popup-content{padding:20px 15px}.omni-puzzle-popup-content h2{font-size:20px}}