:root{ --bg:#050814; }
html,body{ height:100%; }
body{
  margin:0;
  background: var(--bg);
  overflow:hidden;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
}
canvas{
  position:fixed;
  inset:0;
  width:100vw;
  height:100vh;
  display:block;
}