body {
    background-color: #121212;
    color: #ffffff;
    font-family: Arial, sans-serif;
  }
  
  .container {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
  }
  
  .title {
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 20px;
    color: #ffffff;
  }
  
  .input-group, .settings, .buttons {
    margin-bottom: 20px;
  }
  
  .label {
    display: block;
    margin-bottom: 5px;
    color: #ffffff;
  }
  
  .textarea, .select, .range {
    width: 100%;
    padding: 10px;
    margin-bottom: 10px;
    border: 1px solid #333333;
    border-radius: 5px;
    background-color: #1e1e1e;
    color: #ffffff;
  }
  
  .textarea {
    height: 120px;
  }
  
  .value {
    display: block;
    margin-top: 5px;
    color: #aaaaaa;
  }
  
  .button {
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.3s;
  }
  
  .button.speak {
    background: linear-gradient(145deg, rgba(0, 255, 0, 0.5), rgba(0, 255, 0, 0.2));
    color: #ffffff;
  }
  
  .button.speak:hover {
    background: linear-gradient(145deg, rgba(0, 255, 0, 0.7), rgba(0, 255, 0, 0.4));
    transform: scale(1.05);
  }
  
  .button.speak.disabled {
    opacity: 0.5;
    cursor: not-allowed;
  }
  
  .button.stop {
    background: linear-gradient(145deg, rgba(255, 0, 0, 0.5), rgba(255, 0, 0, 0.2));
    color: #ffffff;
  }
  
  .button.stop:hover {
    background: linear-gradient(145deg, rgba(255, 0, 0, 0.7), rgba(255, 0, 0, 0.4));
    transform: scale(1.05);
  }
  
  .settings {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
  }
  
  .setting {
    flex: 1;
    margin-right: 10px;
  }
  
  .setting:last-child {
    margin-right: 0;
  }
  
  .buttons {
    display: flex;
    justify-content: space-between;
  }