body {
  font-family: Arial, sans-serif;
  text-align: center;
  background-color: #f0f0f0;
  padding: 20px;
}

#metronome-controls {
  margin: 20px auto;
  display: inline-block;
}

button {
  margin: 5px;
  padding: 10px 20px;
  background-color: #4CAF50;
  color: white;
  border: none;
  cursor: pointer;
  font-size: 16px;
}

button:disabled {
  background-color: #ccc;
  cursor: not-allowed;
}

#measures {
  margin-top: 20px;
}
.measure {
  margin: 10px 0;
  padding: 10px;
  border: 1px solid black;
}

.measure.active {
  background-color: yellow;
  border-color: orange;
  font-weight: bold;
}

.beat {
  padding: 5px;
}

.active-beat {
  background-color: lightblue;
  border: 1px solid blue;
  font-weight: bold;
}