body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f9;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
  }
  
  #pomodoro-clock {
    text-align: center;
    padding: 20px;
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    width: 300px;
  }
  
  h1 {
    font-size: 24px;
    margin-bottom: 20px;
  }
  
  div {
    margin: 10px 0;
  }
  
  button {
    padding: 10px 15px;
    margin: 5px;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
  }
  
  button:disabled {
    background-color: #ccc;
    cursor: not-allowed;
  }
  
  #time-left {
    font-size: 36px;
    font-weight: bold;
  }
  
  audio {
    display: none;
  }