body, html {
      height: 100%;
    }
    body {
      background-color: #000;
      color: #fff;
    }
    .login-container {
      max-width: 400px;
      margin: 0 auto;
      margin-top: 100px;
      background-color: #333;
      padding: 20px;
      border-radius: 8px;
      box-shadow: 0 0 10px rgba(0,0,0,0.2);
    }
    .form-control {
      background-color: #444;
      color: #fff;
      border: 1px solid #555;
    }
    .form-check-input {
      background-color: #444;
      border-color: #555;
    }
    .btn-primary {
      background-color: #007bff;
      border-color: #007bff;
    }
    .btn-primary:hover {
      background-color: #0056b3;
      border-color: #0056b3;
    }