/* Full-viewport dark canvas & no page scroll */
html,
body {
  height: 100%;
  margin: 0;
  background: #000;
  overflow: hidden; /* no scrolling */
}

/* WebGL canvas fills the viewport */
canvas {
  display: block;
  outline: none;
  width: 100vw;
  height: 100vh;
  justify-content: center;
  text-align: center;
}

/* Loading overlay */
#loading {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  color: #aaa;
  font: 14px/1 system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  pointer-events: none;
}

/* No-JS fallback */
.noscript-note {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  color: #ddd;
  background: #000;
  font: 14px/1.2 system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
}