* { margin: 0; padding: 0; box-sizing: border-box; }

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #0a0500;
  font-family: 'Playfair Display', 'Georgia', serif;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}

canvas {
  display: block;
  width: 100%;
  height: 100%;
}

#ui-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 10;
}

#fullscreen-btn {
  position: fixed;
  top: 12px;
  right: 12px;
  pointer-events: auto;
  background: rgba(212, 175, 55, 0.15);
  border: 1px solid rgba(212, 175, 55, 0.4);
  color: #d4af37;
  font-size: 20px;
  width: 40px;
  height: 40px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  transition: background 0.2s;
  z-index: 20;
  font-family: 'Major Mono Display', monospace;
}

#fullscreen-btn:hover {
  background: rgba(212, 175, 55, 0.3);
}