body {
      font-family: Arial, sans-serif;
      margin: 0;
      padding: 0;
      display: flex;
      flex-direction: column;
      height: 100vh;
      background-color: #f1f2f6;
    }

    header {
      background: #0f172a;
      color: white;
      padding: 12px;
      text-align: center;
    }

    header h2 {
      margin: 0;
      font-size: 1.2em;
    }

    main {
      flex: 1;
      display: flex;
      justify-content: center;
      align-items: center;
      flex-direction: column;
      row-gap: 5%;
    }

    #login-form {
      background: #fff;
      padding: 30px;
      border-radius: 12px;
      box-shadow: 0 2px 8px rgba(0,0,0,0.2);
      width: 100%;
      max-width: 400px;
    }

    #login-form input {
      width: 100%;
      padding: 12px;
      margin: 10px 0;
      border-radius: 20px;
      border: 1px solid #ccc;
      outline: none;
      box-sizing: border-box;
    }

    #login-form button {
      width: 100%;
      padding: 12px;
      border-radius: 20px;
      border: none;
      background-color: #1e293b;
      color: white;
      font-size: 1em;
      cursor: pointer;
      margin-top: 10px;
    }

    #login-form button:hover {
      background-color: #334155;
    }

    #login-error {
      color: red;
      margin-top: 10px;
      font-size: 0.9em;
      text-align: center;
    }