:root { color-scheme: light; background: #87ceeb; }
* { box-sizing: border-box; }
html, body { margin: 0; width: 100%; height: 100%; overflow: hidden; }
main { position: fixed; inset: 0; overflow: hidden; background: linear-gradient(160deg, #fff 0%, #f8f8f8 38%, #87ceeb 100%); }
canvas { width: 100%; height: 100%; display: block; pointer-events: none; }