* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html,
body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #05100f;
  color: #eaf7f0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  overscroll-behavior: none;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}

#stage {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at 50% 40%, #0d2b2a 0%, #05100f 72%);
}

canvas#game {
  display: block;
  touch-action: none;
  image-rendering: auto;
  border-radius: 6px;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.65), 0 0 0 1px rgba(120, 220, 170, 0.08);
}

@media (max-width: 620px) {
  canvas#game {
    border-radius: 0;
    box-shadow: none;
  }
}