body{margin:0;padding:0;overflow:hidden;font-family:Arial,sans-serif;touch-action:none}#game-container{position:relative;width:100vw;height:100vh}#hud{position:absolute;top:20px;left:20px;color:#fff;font-size:18px;text-shadow:1px 1px 2px rgba(0,0,0,.8);z-index:10;pointer-events:none}#hud div{margin-bottom:10px}#start-screen{position:absolute;top:0;left:0;width:100%;height:100%;display:flex;flex-direction:column;justify-content:center;align-items:center;background-color:#000000b3;color:#fff;z-index:20}#start-screen h1{margin-bottom:30px;text-align:center;font-size:2.5rem}#start-button{padding:12px 24px;font-size:20px;background-color:#4caf50;color:#fff;border:none;border-radius:4px;cursor:pointer;transition:background-color .3s;min-width:200px;min-height:60px;-webkit-tap-highlight-color:transparent;-webkit-user-select:none;user-select:none;touch-action:manipulation}#start-button:hover{background-color:#45a049}#start-button:active{background-color:#3e8e41;transform:scale(.98)}@media (max-width: 768px){#hud{font-size:16px;top:10px;left:10px}#start-screen h1{font-size:2rem;padding:0 20px}#start-button{padding:15px 30px;font-size:22px;min-width:220px;min-height:70px}}@media (max-height: 500px) and (orientation: landscape){#hud{top:5px;left:5px;font-size:14px}#hud div{margin-bottom:5px}#start-screen h1{font-size:1.5rem;margin-bottom:15px}#start-button{min-height:50px}}.high-score-email-container{position:fixed;top:0;left:0;width:100%;height:100%;background-color:#000c;display:flex;justify-content:center;align-items:center;z-index:1000}.high-score-email-content{background-color:#222;border:2px solid #0ff;border-radius:10px;padding:20px;max-width:500px;width:90%;color:#fff;text-align:center}.high-score-email-content h2{color:#0ff;margin-top:0}.high-score-email-content input{width:100%;padding:10px;margin:15px 0;border:1px solid #0ff;background-color:#333;color:#fff;border-radius:5px;font-size:16px}.high-score-email-content .button-row{display:flex;justify-content:space-between;margin-top:20px}.high-score-email-content button{padding:10px 20px;background-color:#0ff;color:#000;border:none;border-radius:5px;cursor:pointer;font-weight:700;transition:background-color .2s}.high-score-email-content button:hover{background-color:#0cf}#skip-email{background-color:#555;color:#fff}#skip-email:hover{background-color:#777}.high-score-notification{position:fixed;top:20%;left:50%;transform:translate(-50%);background-color:#0f0c;color:#fff;padding:15px 30px;border-radius:10px;font-size:24px;font-weight:700;z-index:1000;text-align:center;animation:pulse 1s infinite}.high-score-notification.fade-out{opacity:0;transition:opacity 1s}@keyframes pulse{0%{transform:translate(-50%) scale(1)}50%{transform:translate(-50%) scale(1.1)}to{transform:translate(-50%) scale(1)}}.lap-completed-message{position:fixed;top:30%;left:50%;transform:translate(-50%);background-color:#000000b3;color:#fff;padding:15px 30px;border-radius:10px;font-size:24px;z-index:1000;text-align:center}.lap-completed-message span{color:#0ff;font-weight:700}.lap-completed-message.fade-out{opacity:0;transition:opacity .5s}.high-score-container{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);background-color:#000000e6;border:2px solid #0ff;border-radius:10px;width:80%;max-width:600px;max-height:80vh;overflow-y:auto;z-index:1000;padding:20px;color:#fff}.high-score-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;border-bottom:1px solid #0ff;padding-bottom:10px}.high-score-header h2{margin:0;color:#0ff}.close-btn{background:none;border:none;color:#0ff;font-size:24px;cursor:pointer}.high-score-table{width:100%;border-collapse:collapse}.high-score-table th,.high-score-table td{padding:10px;text-align:left;border-bottom:1px solid rgba(0,255,255,.3)}.high-score-table th{color:#0ff}.loading,.no-scores,.error{text-align:center;padding:20px}.no-scores{font-style:italic}.error{color:#f55}.player-score{background-color:#0ff3;font-weight:700}.track-tabs{display:flex;flex-wrap:wrap;gap:5px;margin-bottom:15px;justify-content:center}.track-tab{background-color:#00000080;color:#fff;border:1px solid rgba(0,255,255,.3);border-radius:5px;padding:8px 12px;cursor:pointer;font-size:14px;transition:all .2s}.track-tab.active{background-color:#0ff3;border-color:#0ff;color:#0ff}.track-tab:hover{background-color:#00ffff1a}.track-scores{max-height:400px;overflow-y:auto}