body {
      font-family: Arial, sans-serif;
      background: #eef1f5;
      display: flex;
      justify-content: center;
      align-items: center;
      height: 100vh;
    }
    .login-box {
      background: white;
      padding: 30px;
      border-radius: 12px;
      box-shadow: 0 0 10px rgba(0,0,0,0.1);
      width: 320px;
      text-align: center;
    }
    input {
      width: 100%;
      padding: 10px;
      margin: 8px 0;
      border: 1px solid #ccc;
      border-radius: 8px;
    }
    button {
      width: 100%;
      padding: 10px;
      border: none;
      background: #007bff;
      color: white;
      border-radius: 8px;
      cursor: pointer;
    }
    button:hover {
      background: #0056b3;
    }
    .error {
      color: red;
      font-size: 14px;
      margin-top: 10px;
    }