body {
      margin: 0;
      background: #000;
      transition: background-color 0.3s ease;
      font-family: 'Courier New', Courier, monospace;
    }
    .overlay {
      background-color: rgba(0, 0, 0, 0.8); /* default dark */
      position: absolute;
      inset: 0;
      transition: background-color 0.3s ease;
      display: flex;
      justify-content: center;
      align-items: center;
      padding: 2rem;
    }
    .terminal-box {
      background-color: #000;
      color: #33ff33;
      padding: 2rem;
      border-radius: 1rem;
      width: 90%;
      max-width: 800px;
      box-shadow: 0 0 20px rgba(0,0,0,0.5);
    }
    .countdown {
      color: #ff5555;
      font-weight: bold;
      margin-top: 1rem;
    }
    textarea {
      width: 100%;
      background-color: #000;
      color: #33ff33;
      border: none;
      resize: none;
      height: 200px;
    }
    .slider-container {
      position: absolute;
      top: 1rem;
      right: 1rem;
      color: white;
      z-index: 1000;
      text-align: right;
    }