*{margin:0;padding:0;box-sizing:border-box;touch-action:none;-webkit-user-select:none;user-select:none}body{font-family:Arial,sans-serif;background:linear-gradient(to bottom,#87ceeb,#98fb98);overflow:hidden;height:100vh;display:flex;justify-content:center;align-items:center}#gameCanvas{width:100%;max-width:400px;height:100vh;display:block}#ui{position:absolute;top:0;left:0;right:0;bottom:0;pointer-events:none}#score,#coins{position:absolute;top:20px;font-size:24px;font-weight:700;color:#fff;text-shadow:2px 2px 4px rgba(0,0,0,.5);pointer-events:none}#score{left:20px}#coins{right:20px}.hidden{display:none!important}#gameOver,#startScreen{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);background:#fffffff2;padding:30px;border-radius:15px;text-align:center;pointer-events:all;box-shadow:0 10px 30px #0000004d}#gameOver h2,#startScreen h1{color:#ff6b35;margin-bottom:15px}#gameOver p,#startScreen p{color:#333;margin-bottom:20px}button{background:#ff6b35;color:#fff;border:none;padding:15px 30px;font-size:18px;border-radius:25px;cursor:pointer;font-weight:700;transition:all .3s}button:active{transform:scale(.95)}button:hover{background:#e55a2b}@media (max-width: 480px){#score,#coins{font-size:20px}#gameOver,#startScreen{padding:20px}}