html, body {
  margin: 0;
  padding: 0;
}

canvas {
  display: block;
  margin: 0 auto;
}

.controls {
  display: flex;
  justify-content: center;
  margin: 16px 0;
  align-items: center;
  gap: 16px;
}

.ctrl-button {
  width: 44px;
  height: 44px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  background: #005f6b;
  border: none;
  border-radius: 50%;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  cursor: pointer;
  touch-action: none;
}

.ctrl-button.play-button {
  width: 56px;
  height: 56px;
}

.ctrl-button:hover {
  background: #007a8a;
}