html,
body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  background: #04060f;
  overflow: hidden;
  overscroll-behavior: none;
  touch-action: none;
  -webkit-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: "Trebuchet MS", "Segoe UI", system-ui, -apple-system, sans-serif;
  display: flex;
  align-items: center;
  justify-content: center;
}

#stage {
  position: relative;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(120% 80% at 50% 0%, #0d1430 0%, #04060f 62%);
}

canvas#game {
  display: block;
  touch-action: none;
  border-radius: 18px;
  box-shadow:
    0 0 0 1px rgba(90, 190, 255, 0.18),
    0 24px 90px rgba(20, 120, 220, 0.20);
  cursor: crosshair;
}