{
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        body {
            background: #f4f6f9;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
        }

        .login-container {
            background: #ffffff;
            padding: 40px;
            border-radius: 8px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            width: 100%;
            max-width: 400px;
        }

        .login-header {
            text-align: center;
            margin-bottom: 30px;
        }

        .login-header h2 {
            color: #333333;
            font-size: 24px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .login-header p {
            color: #777777;
            font-size: 14px;
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-group label {
            display: block;
            margin-bottom: 8px;
            color: #555555;
            font-size: 14px;
            font-weight: 500;
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid #cccccc;
            border-radius: 6px;
            font-size: 14px;
            color: #333333;
            transition: border-color 0.2s;
        }

        .form-control:focus {
            outline: none;
            border-color: #007bff;
        }

        .btn-login {
            width: 100%;
            padding: 12px;
            background: #007bff;
            border: none;
            border-radius: 6px;
            color: #ffffff;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
            margin-top: 10px;
        }

        .btn-login:hover {
            background: #0056b3;
        }

        .alert-error {
            background-color: #f8d7da;
            color: #721c24;
            padding: 12px;
            border-radius: 6px;
            margin-bottom: 20px;
            font-size: 14px;
            border: 1px solid #f5c6cb;
        }