*{box-sizing:border-box;margin:0;padding:0}body{color:#333;background-image:url(./cube_nets-Bbz7OPRP.svg);background-repeat:repeat;min-height:100vh;font-family:SF Mono,Fira Code,Fira Mono,Roboto Mono,Courier New,monospace}.game-container{box-sizing:border-box;flex-direction:column;max-height:100vh;margin:0 auto;padding:20px;display:flex;overflow:visible}@media (width<=480px){.game-container{padding:10px}}.game-header{background:#ffffffeb;border:1px solid #999;margin-bottom:20px;padding:20px}.game-header h1{text-align:center;color:#4a5568;margin-bottom:15px;font-size:2rem;font-weight:700}.game-stats{flex-wrap:wrap;justify-content:space-around;gap:15px;margin-bottom:15px;display:flex}.stat{flex-direction:column;align-items:center;min-width:100px;display:flex}.stat .label{color:#666;margin-bottom:5px;font-size:.9rem}.stat .value{color:#2d3748;font-size:1.2rem;font-weight:600}.time-progress-container{background:#e2e8f0;width:100%;height:8px;overflow:hidden}.time-progress-bar{background:linear-gradient(90deg,#48bb78,#ed8936,#f56565);height:100%;transition:width .1s}.game-content{flex:1;grid-template-columns:1fr 2fr;gap:20px;min-height:0;display:grid}@media (width<=768px){.game-container{max-height:none;overflow:auto}.game-content{grid-template-columns:1fr}}.shape-section,.options-section{background:#ffffffeb;border:1px solid #999;flex-direction:column;min-height:0;padding:20px;display:flex}.options-section{overflow:hidden}.shape-section h2,.options-header{justify-content:center;align-items:center;margin-bottom:10px;display:flex}.options-section h2{color:#4a5568;margin:0;font-size:1.5rem}.restart-btn{padding:.5rem 1rem;font-size:.9rem}.shape-section p,.options-section p{text-align:center;color:#666;margin-bottom:0}.instruction{color:#666;margin-top:5px;font-size:.9rem;font-style:italic}.shape-3d-container{border:none;flex:1 1 0;width:100%;min-height:200px;margin:10px 0;position:relative}.shape-3d-container canvas{position:absolute;top:0;left:0;width:100%!important;height:100%!important}.options-canvas{cursor:pointer;background:#f7fafc;border:1px solid #999;max-width:100%;height:auto;margin:0 auto;display:block}.debug{border:2px solid #48bb78;box-shadow:0 0 10px #48bb7880}.result-modal-overlay{z-index:1000;background:#00000080;justify-content:center;align-items:center;width:100%;height:100%;display:flex;position:fixed;top:0;left:0}.result-modal{text-align:center;background:#fff;border:1px solid #999;width:90%;max-width:400px;padding:30px;animation:.3s modalSlideIn}@keyframes modalSlideIn{0%{opacity:0;transform:translateY(-20px)scale(.95)}to{opacity:1;transform:translateY(0)scale(1)}}.result-title{margin-bottom:20px;font-size:2rem;font-weight:700}.result-title.correct{color:#48bb78}.result-title.incorrect{color:#f56565}.score-info,.correct-answer-info{color:#666;margin-bottom:25px}.score-info p,.correct-answer-info p{margin-bottom:8px}.result-actions{justify-content:center;gap:15px;display:flex}.btn{cursor:pointer;background:#fff;border:1px solid #999;padding:12px 24px;font-size:1rem;font-weight:600;text-decoration:none;transition:background .15s;display:inline-block}.btn-primary{color:#fff;background:#333;border-color:#333}.btn-primary:hover{background:#555}.btn-secondary{color:#333;background:#fff}.btn-secondary:hover{background:#eee}.cube-3d{width:60px;height:60px;transform-style:preserve-3d}.face-3d{backface-visibility:hidden;border:2px solid #333;justify-content:center;align-items:center;width:60px;height:60px;font-size:24px;font-weight:700;display:flex;position:absolute}.triangular-prism-3d{width:60px;height:60px;transform-style:preserve-3d}.triangular-face{clip-path:polygon(50% 0%,0% 100%,100% 100%)}@media (width<=768px){.game-header h1{font-size:1.5rem}.game-stats{flex-direction:row;align-items:center;gap:5px;margin-bottom:5px}.stat{flex-direction:row;min-width:0}.stat .label{margin-bottom:0;font-size:.8rem}.stat .value{font-size:.8rem;font-weight:400}#difficulty-stat .label,.shape-section h2{display:none}.shape-3d-container{margin:0}.result-actions{flex-direction:column}.shape-3d-container{flex:none;min-height:250px}.shape-section,.options-section{padding:15px}.options-header{flex-direction:column;gap:10px}.options-section h2{text-align:center;color:#4a5568;font-size:1.2rem}}@media (width<=480px){.shape-3d-container{min-height:200px}.shape-section h2,.options-section h2{font-size:1rem}}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.loading{animation:2s linear infinite spin}.options-section{position:relative}.folding-overlay{z-index:10;background:#000000d9;justify-content:center;align-items:center;animation:.3s ease-in fadeIn;display:flex;position:absolute;inset:0}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.folding-animation-container{width:100%;height:100%;position:relative}.folding-animation-container canvas{width:100%;height:100%;display:block}.result-indicator{z-index:20;pointer-events:none;justify-content:center;align-items:center;width:120px;height:120px;font-size:5rem;animation:.4s ease-out forwards resultPop;display:flex;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)scale(0)}.result-indicator.correct{color:#fff;background:#48bb78e6}.result-indicator.incorrect{color:#fff;background:#f56565e6}@keyframes resultPop{0%{opacity:0;transform:translate(-50%,-50%)scale(0)}60%{opacity:1;transform:translate(-50%,-50%)scale(1.2)}to{opacity:1;transform:translate(-50%,-50%)scale(1)}}.loading-overlay{z-index:1000;background:#000000b3;flex-direction:column;justify-content:center;align-items:center;animation:.2s ease-in fadeIn;display:flex;position:fixed;inset:0}.loading-overlay p{color:#fff;margin-top:20px;font-size:1.2rem}.loading-spinner{border:2px solid #ffffff4d;border-top-color:#fff;width:50px;height:50px;animation:1s linear infinite spin}