body {
      font-family: Arial, sans-serif;
      background: #111;
      color: #fff;
      text-align: center;
      padding: 40px;
    }

    input, button {
      padding: 10px;
      margin: 5px;
      border-radius: 5px;
      border: none;
      font-size: 1rem;
    }

    button {
      background-color: #28a745;
      color: white;
      cursor: pointer;
    }

    button:hover {
      background-color: #218838;
    }

    table {
      margin-top: 30px;
      width: 100%;
      max-width: 400px;
      margin-left: auto;
      margin-right: auto;
      border-collapse: collapse;
    }

    th, td {
      border: 1px solid #555;
      padding: 10px;
    }

    th {
      background-color: #222;
    }