:root { color-scheme: dark; font-family: system-ui, sans-serif; background: #10161e; color: #e8eef7; }
body { margin: 0; }
#stage { display: flex; flex-direction: column; align-items: center; min-height: 100vh; }
#scene-status { font-size: 14px; padding: 0 16px; min-height: 2em; }
#canvas { display: block; width: 420px; max-width: 100%; height: 100vh; min-height: 720px; outline-offset: -3px; }
@media (max-width: 760px) {
  #canvas { width: 100%; height: 720px; min-height: 720px; }
}