body {
    font-family: Georgia, serif;
    background: url('https://i.pinimg.com/736x/5d/aa/06/5daa06a967ce2b1e5cb20f838c3d32f3.jpg') no-repeat center center fixed;
    background-size: cover;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
  }

  .container {
    background: rgba(255, 255, 255, 0.7);
    padding: 25px;
    border: 1px solid #ccc;
    border-radius: 10px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.3);
    width: 400px;
    text-align: center;
  }

  h2 {
    margin-bottom: 15px;
    color: #333;
  }

  #output {
    min-height: 50px;
    border: 1px solid #ccc;
    padding: 10px;
    margin-bottom: 10px;
    background-color: #f5f5f5;
    border-radius: 5px;
    font-size: 16px;
    color: #333;
  }

  button {
    padding: 8px 14px;
    margin: 5px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-weight: bold;
    color: white;
  }

  button:hover {
    opacity: 0.9;
  }

  .start {
    background-color: #4CAF50;
  }

  .stop {
    background-color: #e53935;
  }

  .add {
    background-color: #2196F3;
  }

  ul {
    list-style: none;
    padding: 0;
    margin-top: 15px;
  }

  li {
    background-color: #e0f7fa;
    padding: 10px;
    margin-bottom: 6px;
    border-radius: 5px;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .removeBtn {
    background-color: #e53935;
    color: white;
    border: none;
    border-radius: 4px;
    padding: 4px 8px;
    cursor: pointer;
    font-size: 12px;
  }