body {
    font-family: Arial, sans-serif;
    background-color: #f2f2f2;
    margin: 0;
    padding: 0;
  }
  
  .container {
    max-width: 600px;
    margin: 50px auto;
    background-color: #fff;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    overflow: hidden;
  }
  
  .heading {
    text-align: center;
    color: #333;
    margin-top: 0;
  }
  
  .stopwatch {
    text-align: center;
    margin-top: 30px;
  }
  
  .display {
    font-size: 3em;
    margin-bottom: 20px;
    color: #333;
    transition: transform 0.3s;
  }
  
  .controls {
    margin-bottom: 20px;
  }
  
  button {
    margin: 5px;
    padding: 10px 20px;
    font-size: 1em;
    background-color: #007bff;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
  }
  
  button:hover {
    background-color: #0056b3;
  }
  
  .laps {
    list-style-type: none;
    padding: 0;
    margin: 0 auto;
    max-width: 400px;
    text-align: left;
  }
  
  .lap-item {
    margin-bottom: 5px;
    padding: 10px;
    background-color: #f9f9f9;
    border-radius: 5px;
    transition: transform 0.3s;
  }
  
  .lap-item:hover {
    transform: scale(1.03);
  }
  
  /* Media queries for responsiveness */
  @media (max-width: 768px) {
    .container {
      max-width: 90%;
    }
    
    .display {
      font-size: 2.5em;
    }
  }
  
  @media (max-width: 576px) {
    .container {
      padding: 10px;
    }
    
    .display {
      font-size: 2em;
    }
  }
  
  footer {
      margin-top: 20px;
      text-align: center;
      font-size: 0.8em;
      color: #777;
    }