:root{color:#f5f5f5;background:#1e1e1e;font-family:Arial,Helvetica,sans-serif}*{box-sizing:border-box}body{margin:0}#app{place-items:center;min-height:100vh;display:grid}.container{text-align:center;padding:32px}h1{margin-bottom:16px}p{margin:12px 0}button{cursor:pointer;padding:10px 18px;font-size:16px}#toggleWireframe{z-index:10;cursor:pointer;padding:8px 12px;font-size:14px;position:absolute;top:16px;right:16px}canvas{display:block}