html,body{margin:0;padding:0;height:100%;background:#02060c;overflow:hidden}
body{display:flex;align-items:center;justify-content:center;
 background:radial-gradient(120% 90% at 50% 10%,#07182e 0%,#030a16 55%,#010409 100%);
 touch-action:none;user-select:none;-webkit-user-select:none}
canvas{width:min(100vw,177.78vh);aspect-ratio:800/450;border-radius:6px;
 box-shadow:0 0 40px rgba(35,160,255,.25),0 0 120px rgba(20,90,180,.18),inset 0 0 0 1px rgba(80,180,255,.2);
 background:#04070f}