:root {
            /* Colors */
            --header-bg: linear-gradient(135deg, #1e5799 0%, #2989d8 50%, #207cca 51%, #7db9e8 100%);
            --headerTop-bg: rgba(255, 255, 255, 0.1);
            --primary-color: #4a90e2;
            --secondary-color: #6c757d;
            --success-color: #28a745;
            --danger-color: #dc3545;
            --warning-color: #ffc107;
            --info-color: #17a2b8;
            --light-color: #f8f9fa;
            --dark-color: #343a40;
            --white-color: #ffffff;

            /* Typography */
            --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            --font-size-base: 0.9rem;
            --font-size-sm: 0.8rem;
            --font-size-lg: 1.1rem;
            --font-size-xl: 1.3rem;

            /* Spacing */
            --spacing-xs: 0.25rem;
            --spacing-sm: 0.5rem;
            --spacing-md: 1rem;
            --spacing-lg: 1.5rem;
            --spacing-xl: 2rem;

            /* Border */
            --border-radius: 4px;
            --border-color: #dee2e6;

            /* Shadow */
            --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
            --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.15);
            --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.2);

            /* Layout */
            --header-height: 120px;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-size: var(--font-size-base);
        }

        body {
            font-family: var(--font-family);
            background: linear-gradient(135deg, #1e5799 0%, #2989d8 50%, #207cca 51%, #7db9e8 100%);
            color: var(--dark-color);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
            position: relative;
            overflow: hidden;
        }


      
        /* Content Area */
        .content {
            background-color: white;
            border-radius: 12px;
            box-shadow: var(--shadow-lg);
            width: 100%;
            max-width: 450px;
            position: relative;
            z-index: 5;
            animation: slideInUp 0.8s ease-out;
            overflow: hidden;
        }

        .content-header {
            background: var(--header-bg);
            color: white;
            padding: 20px;
            text-align: center;
        }

        .content-header h2 {
            font-size: var(--font-size-xl);
            font-weight: 600;
            margin-bottom: 5px;
        }

        .content-header p {
            font-size: var(--font-size-sm);
            opacity: 0.9;
        }

        /* Login Form */
        .login-form {
            padding: 30px;
        }

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

        .form-label {
            display: block;
            font-weight: 600;
            margin-bottom: 8px;
            color: #555;
            text-transform: uppercase;
            font-size: var(--font-size-sm);
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 2px solid #e1e5e9;
            border-radius: 6px;
            background-color: #f8f9fa;
            font-size: var(--font-size-base);
            transition: all 0.3s ease;
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary-color);
            background-color: white;
            box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
        }

        .form-control:valid {
            border-color: var(--success-color);
        }

        .form-control:invalid {
            border-color: var(--danger-color);
        }


        /* Password Input Container */
        .password-container {
            position: relative;
        }

        .password-toggle {
            position: absolute;
            right: 12px;
            top: 50%;
            transform: translateY(-50%);
            background: none;
            border: none;
            cursor: pointer;
            color: var(--secondary-color);
            font-size: 16px;
            padding: 4px;
            border-radius: 4px;
            transition: color 0.3s ease;
        }

        .password-toggle:hover {
            color: var(--primary-color);
        }

        /* Remember Me */
        .checkbox-group {
            display: flex;
            align-items: center;
            gap: 8px;
            margin: 20px 0;
        }

        .checkbox {
            width: 18px;
            height: 18px;
            accent-color: var(--primary-color);
        }

        .checkbox-label {
            font-size: var(--font-size-sm);
            color: var(--secondary-color);
            cursor: pointer;
        }

        /* Login Button */
        .btn-login {
            width: 100%;
            background: linear-gradient(135deg, var(--primary-color), #357abd);
            color: white;
            border: none;
            padding: 14px 20px;
            border-radius: 8px;
            cursor: pointer;
            font-weight: 600;
            font-size: var(--font-size-base);
            transition: all 0.3s ease;
            box-shadow: var(--shadow-sm);
            margin-bottom: 20px;
        }

        .btn-login:hover {
            background: linear-gradient(135deg, #357abd, #2a5a8a);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .btn-login:active {
            transform: translateY(0);
        }

        .btn-login:disabled {
            background: var(--secondary-color);
            cursor: not-allowed;
            transform: none;
            box-shadow: none;
        }

   
        /* Error Message */
        .error-message {
            background-color: #f8d7da;
            color: #721c24;
            padding: 10px 15px;
            border-radius: 4px;
            margin-bottom: 20px;
            border: 1px solid #f5c6cb;
            font-size: var(--font-size-sm);
            display: none;
        }

        .error-message.show {
            display: block;
            animation: shake 0.5s ease-in-out;
        }

        /* Footer */
        .footer {
            text-align: center;
            padding: 20px;
            font-size: var(--font-size-sm);
            font-weight: 600;
            background: var(--header-bg);
            color: var(--white-color);
            position: fixed;
            right: 0;
            bottom: 0;
            left: 0;
            z-index: 1030;
        }

        /* Responsive Design */
        @media (max-width: 768px) {
           
            .content {
                max-width: 100%;
            }

            .login-form {
                padding: 20px;
            }

        }

        @media (max-width: 480px) {
            .content {
                margin: 0 10px;
            }

            .login-form {
                padding: 15px;
            }
        }