body{margin:0;padding:0;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;overflow:hidden}#root{width:100vw;height:100vh}.overlay{pointer-events:none;box-sizing:border-box;flex-direction:column;justify-content:space-between;width:100%;height:100%;padding:20px;display:flex;position:absolute;top:0;left:0}.hud{justify-content:space-between;width:100%;display:flex}.hud-item{color:#4caf50;text-transform:uppercase;letter-spacing:2px;background:#000000b3;border:2px solid #4caf50;border-radius:8px;flex-direction:column;align-items:center;padding:10px 20px;font-size:24px;font-weight:700;display:flex}.timer-display{color:#0ff;border-color:#0ff;min-width:150px}.best-time{opacity:.8;margin-top:4px;font-size:12px}.intro-screen{color:#fff;z-index:100;background:#000000e6;justify-content:center;align-items:center;width:100%;height:100%;display:flex;position:absolute;top:0;left:0}.intro-content{text-align:center;width:90%;max-width:600px}.intro-content h1{color:#4caf50;text-shadow:0 0 20px #4caf5080;margin-bottom:10px;font-size:3rem}.level-selection{background:#ffffff0d;border:1px solid #ffffff1a;border-radius:15px;margin:40px 0;padding:20px}.level-grid{grid-template-columns:repeat(auto-fill,minmax(60px,1fr));gap:15px;max-height:300px;margin-top:20px;padding:10px;display:grid;overflow-y:auto}.level-btn{color:#fff;cursor:pointer;background:#2196f3;border:none;border-radius:8px;padding:15px;font-weight:700;transition:transform .2s,background .2s}.level-btn:hover{background:#1976d2;transform:scale(1.1)}.start-btn{color:#4caf50;cursor:pointer;background:0 0;border:2px solid #4caf50;border-radius:30px;margin-top:20px;padding:15px 40px;font-size:1.2rem;font-weight:700;transition:all .3s}.start-btn:hover{color:#fff;background:#4caf50;box-shadow:0 0 30px #4caf5066}.hud-column{flex-direction:column;display:flex}.bottom-ui{flex-direction:column;align-items:center;gap:15px;display:flex}.open-shop-btn{color:#fff;cursor:pointer;pointer-events:auto;background:#2196f3;border:none;border-radius:5px;padding:12px 30px;font-size:18px;font-weight:700;box-shadow:0 4px 15px #2196f366}.open-shop-btn:hover{background:#1976d2;transform:translateY(-2px)}.shop-overlay{z-index:200;background:#000000d9;justify-content:center;align-items:center;width:100%;height:100%;display:flex;position:absolute;top:0;left:0}.shop-content{color:#fff;background:#1a1a1a;border:3px solid #2196f3;border-radius:15px;width:90%;max-width:600px;padding:30px}.shop-header{border-bottom:2px solid #333;justify-content:space-between;align-items:center;margin-bottom:20px;padding-bottom:10px;display:flex}.shop-header h1{color:#2196f3;margin:0}.shop-coins{color:gold;font-size:24px;font-weight:700}.shop-grid{flex-direction:column;gap:20px;display:flex}.shop-item{background:#222;border-radius:10px;justify-content:space-between;align-items:center;padding:20px;display:flex}.item-info h3{margin:0;font-size:18px}.item-info p{color:#888;margin:5px 0 0}.buy-btn{color:#fff;cursor:pointer;background:#4caf50;border:none;border-radius:5px;padding:10px 20px;font-weight:700}.buy-btn:disabled{color:#666;cursor:not-allowed;background:#333}.close-shop-btn{color:#fff;cursor:pointer;background:#f44336;border:none;border-radius:5px;width:100%;margin-top:30px;padding:15px;font-size:18px;font-weight:700}.skins-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:15px;max-height:400px;padding-right:10px;display:grid;overflow-y:auto}.skin-card{text-align:center;background:#222;border:2px solid #0000;border-radius:10px;padding:10px;transition:all .2s}.skin-card.selected{background:#1a1a1a;border-color:#2196f3}.skin-preview{border-radius:5px;width:100%;height:60px;margin-bottom:10px;box-shadow:inset 0 0 10px #00000080}.skin-info h4{margin:0 0 10px;font-size:14px}.select-btn{color:#fff;cursor:pointer;background:#2196f3;border:none;border-radius:4px;width:100%;padding:8px;font-weight:700}.select-btn.active{cursor:default;background:#4caf50}