* { margin: 0; padding: 0; box-sizing: border-box; }
html, body { width: 100%; height: 100%; overflow: hidden; background: #1a1a1a; }
body { font-family: system-ui, sans-serif; -webkit-user-select: none; user-select: none; }
canvas { display: block; background: #87CEEB; touch-action: none; }