:root {
  --bg: #0e1117;
  --fg: #e6ebf5;
}

html, body {
  height: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Noto Sans,
               Apple Color Emoji, Segoe UI Emoji, Noto Color Emoji, Arial, Helvetica, sans-serif;
  display: grid;
  place-items: center;
}

#game {
  display: block;
  background: transparent;
  box-shadow: 0 10px 30px rgba(0,0,0,0.35);
  border-radius: 10px;
  width: 100vw;
  height: 100vh;
}

#hud {
  position: fixed;
  top: 8px;
  left: 0;
  right: 0;
  text-align: center;
  font-size: 18px;
  letter-spacing: 0.5px;
  text-shadow: 0 1px 2px rgba(0,0,0,0.6);
  pointer-events: none;
  z-index: 10;
}

#controls {
  position: fixed;
  bottom: 14px;
  left: 0;
  right: 0;
  display: flex;
  gap: 10px;
  align-items: center;
  justify-content: center;
  z-index: 20;
}

#controls button {
  background: rgba(255,255,255,0.1);
  color: var(--fg);
  border: 1px solid rgba(255,255,255,0.15);
  padding: 8px 14px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  backdrop-filter: blur(6px);
}

#controls button:hover {
  background: rgba(255,255,255,0.18);
}

#overlay.hidden { display: none; }

#overlay {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(0,0,0,0.35);
  color: var(--fg);
  font-size: 48px;
  text-shadow: 0 2px 8px rgba(0,0,0,0.7);
  z-index: 5;
  pointer-events: none;
}