body {
  background-color: #0f0f0f;
  display: flex;
  align-items: center;
}

canvas {
  background-color: #f0f0f0;
  border-bottom: transparent;
  margin: 0 auto;
  display: block;
  box-shadow: 0px 0px 20px 0px rgba(0, 0, 0, 0.4);
}

.container {
  display: grid;
  margin: 0 auto;
}

.btn.container {
  margin-left: 0;
}

.btn {
  padding: 16px 32px;
  margin: 5px;
  font-size: 24px;
  font-weight: bold;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background-color 0.2s ease-in-out;
}

.start:hover {
  background-color: #3498db;
}

.stop:hover {
  background-color: #3498db;
}

.start {
  background-color: #2ecc71;
  color: #fff;
}

.stop {
  background-color: #e74c3c;
  color: #fff;
}

.info.container {
  font-size: 24px;
  font-weight: bold;
  color: #fff;
}