h1 {
  margin-top: 32px;
}

body {
  margin-left: 32px;
  background: #111;
  color: white;
  min-height: 100vh;
  font-family: 'Segoe UI', Arial, sans-serif;
}

canvas {
  border: 1px solid white;
  background: black;
  cursor: grab;
  display: none; /* Hide by default */
  position: fixed;
  right: 30px;
  bottom: 80px;
  z-index: 1001;
  box-shadow: 0 4px 24px #000a;
}
canvas:active {
  cursor: grabbing;
}
#sim-toggle-btn {
  position: fixed;
  right: 30px;
  bottom: 30px;
  z-index: 1002;
  background: #222;
  color: #fff;
  border: none;
  border-radius: 50%;
  width: 48px;
  height: 48px;
  font-size: 24px;
  box-shadow: 0 2px 8px #000a;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}
#sim-toggle-btn:hover {
  background: #444;
}