.container {
  position: relative;
}

.controls {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: 1rem;
  left: 1rem;
}

.controls button {
  cursor: pointer;
  width: 2rem;
  height: 2rem;
  background-color: white;
  margin-bottom: 0.5rem;
}

.controls button:hover {
  background-color: #f0f0f0;
}

.controls button:active {
  background-color: #b0b0b0;
}