body {
    font-family: Arial, sans-serif;
    margin: 20px;
    background: #f8f9fa;
  }
  h1 {
    text-align: center;
    color: #333;
  }
  table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
    background: #fff;
    box-shadow: 0 0 5px rgba(0,0,0,0.1);
  }
  th, td {
    border: 1px solid #ccc;
    padding: 8px;
    text-align: center;
  }
  th {
    background: #007bff;
    color: white;
  }
  button {
    margin: 5px;
    padding: 10px 15px;
    background: #007bff;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
  }
  button:hover {
    background: #0056b3;
  }
  input[type="file"], input[type="text"], input[type="password"] {
    margin: 5px;
    padding: 8px;
  }
  .controls {
    text-align: center;
  }
  .login-container {
    width: 300px;
    margin: 100px auto;
    padding: 20px;
    background: #fff;
    border-radius: 6px;
    box-shadow: 0 0 5px rgba(0,0,0,0.2);
    text-align: center;
  }
  .error {
    color: red;
    font-size: 0.9em;
  }