.container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  max-height: 75vh;
}

.button {
  display: flex;
  justify-content: center;
  margin-top: 15px;
}

.btn {
  background-color: #4caf50;
  border: none;
  color: white;
  padding: 10px 20px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
  margin: 10px;
  cursor: pointer;
  border-radius: 5px;
}

.btn:hover {
  background-color: #3e8e41;
}

.control {
  text-align: center;
}

canvas {
  background: #000;
  width: 95vmin;
}
body {
  overscroll-behavior-y: contain;
  max-height: 80vh;
  user-select: none;
  -moz-user-select: none;
  -o-user-select: none;
}