:root {
  --bg: #111;
  --block: #6cf;
  --player: #ffb86b;
  --hud: #ddd;
}

html,
body {
  display: block;
  height: 100%;
  margin: 0;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(180deg, #0b1220, #07101a);
}

canvas {
  image-rendering: pixelated;
  background: var(--bg);
  max-width: 100%;
  height: auto;
  display: block;
}

.hint {
  position: fixed;
  left: 12px;
  top: 12px;
  color: var(--hud);
  font-family: system-ui, Segoe UI, Roboto, Arial, sans-serif;
  font-size: 13px;
}