*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background:linear-gradient(135deg,#667eea,#764ba2);min-height:100vh;display:flex;justify-content:center;align-items:center;padding:20px}#app{background:#fff;border-radius:16px;box-shadow:0 20px 60px #0000004d;padding:30px;max-width:900px;width:100%}#game-header{text-align:center;margin-bottom:20px}#game-header h1{font-size:2.5rem;color:#333;margin-bottom:10px;font-weight:800}#level-info{display:flex;justify-content:space-around;margin-top:15px;padding:10px;background:#f5f5f5;border-radius:8px}#level-info span{font-size:1.1rem;font-weight:600;color:#555}#game-container{display:flex;justify-content:center;align-items:center;margin:20px 0;background:#f0f0f0;border-radius:8px;padding:20px}#game-canvas{display:block;border-radius:4px;box-shadow:0 4px 12px #0000001a}#controls{margin-top:20px;text-align:center}.control-text{background:#f9f9f9;padding:15px;border-radius:8px;margin-bottom:15px}.control-text p{margin:8px 0;color:#555;font-size:1rem}.control-text strong{color:#667eea;font-weight:700}button{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;padding:12px 30px;font-size:1rem;font-weight:600;border-radius:8px;cursor:pointer;transition:transform .2s,box-shadow .2s;margin:5px}button:hover{transform:translateY(-2px);box-shadow:0 6px 20px #667eea66}button:active{transform:translateY(0)}#complete-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#000c;display:flex;justify-content:center;align-items:center;z-index:1000;animation:fadeIn .3s ease-in}#complete-overlay.hidden{display:none}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}#complete-popup{background:#fff;padding:40px;border-radius:16px;text-align:center;max-width:400px;animation:slideUp .3s ease-out}@keyframes slideUp{0%{transform:translateY(30px);opacity:0}to{transform:translateY(0);opacity:1}}#complete-popup h2{font-size:2rem;color:#333;margin-bottom:20px}#complete-moves{font-size:1.3rem;color:#667eea;font-weight:600;margin-bottom:25px}.button-group{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}.button-group button{flex:1;min-width:120px}@media (max-width: 768px){#app{padding:20px}#game-header h1{font-size:2rem}#level-info{flex-direction:column;gap:5px}#game-canvas{max-width:100%;height:auto}#complete-popup{padding:30px 20px;margin:20px}}#help-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#000c;display:flex;justify-content:center;align-items:center;z-index:2000}#help-popup{background:#fff;border-radius:16px;padding:30px;max-width:600px;max-height:80vh;overflow-y:auto;position:relative;box-shadow:0 20px 60px #0000004d}#help-popup h2{color:#333;margin-bottom:20px;font-size:2rem}#help-popup h3{color:#555;margin-top:20px;margin-bottom:10px;font-size:1.3rem}.close-btn{position:absolute;top:15px;right:20px;background:#f5f5f5;border:2px solid #ddd;font-size:2rem;color:#666;cursor:pointer;padding:0;width:40px;height:40px;display:flex;align-items:center;justify-content:center;border-radius:50%;transition:all .2s;font-weight:700;line-height:1;z-index:1000;pointer-events:auto}.close-btn:hover{background:#667eea;color:#fff;border-color:#667eea;transform:scale(1.1)}.close-btn:active{transform:scale(.95)}.legend-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px;margin:15px 0}.legend-item{display:flex;align-items:center;gap:12px;padding:8px;background:#f9f9f9;border-radius:6px;font-size:.9rem}.legend-item .tile-icon{flex-shrink:0;margin:0}.legend-symbol{display:inline-block;width:30px;text-align:center;font-weight:700;margin-right:8px;color:#667eea}#help-popup p{margin:8px 0;color:#666;line-height:1.6}#legend{margin:20px 0;padding:15px;background:#f9f9f9;border-radius:12px;border:1px solid #e0e0e0}#legend summary{cursor:pointer;font-size:1.1rem;font-weight:700;color:#333;padding:5px 0;list-style:none;-webkit-user-select:none;user-select:none;margin-bottom:15px}#legend summary::-webkit-details-marker{display:none}#legend summary:before{content:"▼ ";display:inline-block;transition:transform .3s;margin-right:5px}#legend[open] summary:before{transform:rotate(-90deg)}#legend summary:hover{color:#667eea}#legend h3{margin:0 0 15px;color:#333;font-size:1.1rem}.legend-row{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}.legend-tile{display:flex;flex-direction:column;align-items:center;gap:5px;min-width:70px}.tile-icon{width:40px;height:40px;border-radius:6px;box-shadow:0 2px 4px #0000001a}.legend-tile span{font-size:.75rem;color:#666;font-weight:500;text-align:center}.mobile-only{display:none}@media (max-width: 768px),(hover: none){.mobile-only{display:flex}.control-text{display:none}}#mobile-controls{margin:15px 0 10px;justify-content:center;padding:0}.dpad-container{position:relative;width:150px;height:150px;display:flex;align-items:center;justify-content:center}.dpad-center{position:absolute;width:50px;height:50px;background:radial-gradient(circle at 30% 30%,#f5f5f5,#d0d0d0);border-radius:50%;box-shadow:0 6px 12px #00000040,inset 0 1px 3px #fff9,inset 0 -2px 4px #00000026;display:flex;align-items:center;justify-content:center;z-index:2;pointer-events:none;border:2px solid rgba(0,0,0,.08)}.dpad-center:before{content:"";width:20px;height:20px;background:linear-gradient(to bottom,transparent 44%,rgba(0,0,0,.25) 50%,transparent 56%),linear-gradient(to right,transparent 44%,rgba(0,0,0,.25) 50%,transparent 56%);border-radius:2px}.dpad-btn{position:absolute;background:transparent;border:none;color:#667eea;font-size:1.8rem;font-weight:700;cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:transparent;-webkit-user-select:none;user-select:none;width:40px;height:40px;display:flex;align-items:center;justify-content:center;transition:all .2s ease-out;z-index:1;filter:drop-shadow(0 2px 4px rgba(0,0,0,.2));line-height:1;padding:0;margin:0}.dpad-btn:active{color:#764ba2;transform:scale(.85);filter:drop-shadow(0 1px 2px rgba(0,0,0,.3))}.dpad-btn.up{top:0;left:50%;transform:translate(-50%)}.dpad-btn.down{bottom:0;left:50%;transform:translate(-50%)}.dpad-btn.left{left:0;top:50%;transform:translateY(-50%);margin-top:0}.dpad-btn.right{right:0;top:50%;transform:translateY(-50%);margin-top:0}.dpad-btn.up:active,.dpad-btn.down:active{transform:translate(-50%) scale(.85)}.dpad-btn.left:active,.dpad-btn.right:active{transform:translateY(-50%) scale(.85)}@media (max-width: 768px){#game-header h1{font-size:1.5rem}#level-info{font-size:.9rem}#game-canvas{max-width:100%;height:auto}#legend{padding:10px;margin:10px 0}#legend summary{font-size:1rem;margin-bottom:0}#legend[open] summary{margin-bottom:15px}#legend h3{font-size:1rem}.legend-row{gap:8px}.legend-tile{gap:4px}.tile-icon{width:30px!important;height:30px!important}.legend-tile span{font-size:.65rem}.button-group{flex-direction:column;width:100%;gap:8px}.button-group button{width:100%}}@media (max-width: 480px){#game-header,#game-container{padding:10px}.dpad-container{width:130px;height:130px}.dpad-center{width:45px;height:45px}.dpad-center:before{width:18px;height:18px}.dpad-btn{font-size:1.5rem;width:36px;height:36px}.dpad-btn.up{top:0}.dpad-btn.down{bottom:0}.dpad-btn.left{left:0}.dpad-btn.right{right:0}}