:root {
  color-scheme: dark;
}

html, body {
  height: 100%;
  margin: 0;
  background: #050607;
  overflow: hidden;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, "Noto Sans JP", sans-serif;
}

#c {
  display: block;
  width: 100vw;
  height: 100vh;
}

.hud {
  position: fixed;
  left: 14px;
  bottom: 12px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 999px;
  background: rgba(0,0,0,.35);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: rgba(255,255,255,.75);
  font-size: 12px;
  user-select: none;
}

.hud .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, #ffd58a, #ff6b1a 55%, #3a0b00 100%);
  box-shadow: 0 0 12px rgba(255,120,40,.5);
}

.hud .sep { opacity: .45; }
.hud .hint { opacity: .7; }

@media (prefers-reduced-motion: reduce) {
  .hud .hint::after {
    content: " (reduced motion)";
    opacity: .7;
  }
}