:root {
            --primary-color: #2563eb;
            --primary-dark: #1d4ed8;
            --secondary-color: #64748b;
            --success-color: #10b981;
            --danger-color: #ef4444;
            --warning-color: #f59e0b;
            --light-color: #f8fafc;
            --dark-color: #1e293b;
            --border-color: #e2e8f0;
            --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
            --hover-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
            --gradient-bg: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }
        
        body {
            background: var(--gradient-bg);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }
        
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
        }
        
        .login-wrapper {
            display: flex;
            background: white;
            border-radius: 20px;
            overflow: hidden;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
            min-height: 600px;
        }
        
        /* Left Side - Welcome Section */
        .welcome-section {
            flex: 1;
            background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
            color: white;
            padding: 60px 40px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            position: relative;
            overflow: hidden;
        }
        
        .welcome-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -50%;
            width: 400px;
            height: 400px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
        }
        
        .welcome-section::after {
            content: '';
            position: absolute;
            bottom: -80px;
            right: 20px;
            width: 300px;
            height: 300px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
        }
        
        .logo {
            display: flex;
            align-items: center;
            gap: 15px;
            margin-bottom: 40px;
            position: relative;
            z-index: 1;
        }
        
        .logo-icon {
            font-size: 40px;
            background: rgba(255, 255, 255, 0.2);
            width: 70px;
            height: 70px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
        }
        
        .logo-text {
            font-size: 28px;
            font-weight: 700;
        }
        
        .welcome-title {
            font-size: 36px;
            font-weight: 700;
            margin-bottom: 20px;
            position: relative;
            z-index: 1;
        }
        
        .welcome-description {
            font-size: 18px;
            line-height: 1.6;
            opacity: 0.9;
            margin-bottom: 30px;
            position: relative;
            z-index: 1;
        }
        
        .features-list {
            list-style: none;
            position: relative;
            z-index: 1;
        }
        
        .features-list li {
            margin-bottom: 15px;
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 16px;
        }
        
        .features-list i {
            background: rgba(255, 255, 255, 0.2);
            width: 32px;
            height: 32px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
        }
        
        /* Right Side - Login Form */
        .login-section {
            flex: 1;
            padding: 60px 50px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        
        .login-header {
            margin-bottom: 40px;
            text-align: center;
        }
        
        .login-title {
            font-size: 32px;
            font-weight: 700;
            color: var(--dark-color);
            margin-bottom: 10px;
        }
        
        .login-subtitle {
            color: var(--secondary-color);
            font-size: 16px;
        }
        
        /* Form Styling */
        .form-group {
            margin-bottom: 24px;
            position: relative;
        }
        
        .form-label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--dark-color);
            font-size: 15px;
        }
        
        .input-with-icon {
            position: relative;
        }
        
        .input-icon {
            position: absolute;
            left: 16px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--secondary-color);
            font-size: 18px;
        }
        
        input[type="text"],
        input[type="password"] {
            width: 100%;
            padding: 16px 16px 16px 50px;
            border: 2px solid var(--border-color);
            border-radius: 10px;
            font-size: 16px;
            transition: all 0.3s;
            background-color: var(--light-color);
        }
        
        input[type="text"]:focus,
        input[type="password"]:focus {
            outline: none;
            border-color: var(--primary-color);
            background-color: white;
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
        }
        
        .show-password {
            position: absolute;
            right: 16px;
            top: 50%;
            transform: translateY(-50%);
            background: none;
            border: none;
            color: var(--secondary-color);
            cursor: pointer;
            font-size: 18px;
        }
        
        .show-password:hover {
            color: var(--primary-color);
        }
        
        /* Button */
        .btn {
            width: 100%;
            padding: 16px;
            border: none;
            border-radius: 10px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
        }
        
        .btn-primary {
            background: var(--primary-color);
            color: white;
            margin-top: 10px;
        }
        
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(37, 99, 235, 0.3);
        }
        
        .btn-primary:active {
            transform: translateY(0);
        }
        
        /* Error Message */
        .error-message {
            background-color: #fee2e2;
            color: #991b1b;
            padding: 16px;
            border-radius: 10px;
            margin-bottom: 24px;
            border-left: 4px solid var(--danger-color);
            display: flex;
            align-items: center;
            gap: 12px;
            animation: slideIn 0.3s ease;
        }
        
        @keyframes slideIn {
            from {
                opacity: 0;
                transform: translateY(-10px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        .error-message i {
            font-size: 20px;
        }
        
        /* Divider */
        .divider {
            display: flex;
            align-items: center;
            margin: 30px 0;
            color: var(--secondary-color);
        }
        
        .divider::before,
        .divider::after {
            content: '';
            flex: 1;
            height: 1px;
            background: var(--border-color);
        }
        
        .divider-text {
            padding: 0 16px;
            font-size: 14px;
        }
        
        /* Register Link */
        .register-link {
            text-align: center;
            margin-top: 30px;
            padding-top: 30px;
            border-top: 1px solid var(--border-color);
        }
        
        .register-text {
            color: var(--secondary-color);
            margin-bottom: 16px;
        }
        
        .btn-secondary {
            background: var(--light-color);
            color: var(--dark-color);
            border: 2px solid var(--border-color);
        }
        
        .btn-secondary:hover {
            background: #f1f5f9;
            border-color: var(--primary-color);
            color: var(--primary-color);
            transform: translateY(-2px);
        }
        
        /* Remember Me */
        .remember-me {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-top: 20px;
        }
        
        .remember-me input[type="checkbox"] {
            width: 18px;
            height: 18px;
            cursor: pointer;
        }
        
        .remember-me label {
            color: var(--secondary-color);
            cursor: pointer;
            font-size: 15px;
        }
        
        /* Responsive */
        @media (max-width: 992px) {
            .login-wrapper {
                flex-direction: column;
                max-width: 500px;
                margin: 0 auto;
            }
            
            .welcome-section {
                padding: 40px 30px;
            }
            
            .login-section {
                padding: 40px 30px;
            }
        }
        
        @media (max-width: 576px) {
            body {
                padding: 10px;
            }
            
            .welcome-title {
                font-size: 28px;
            }
            
            .login-title {
                font-size: 26px;
            }
            
            .logo-text {
                font-size: 24px;
            }
            
            .logo-icon {
                width: 60px;
                height: 60px;
                font-size: 32px;
            }
        }
        
        /* Loading Animation */
        .loading {
            display: none;
        }
        
        .loading.active {
            display: inline-block;
            animation: spin 1s linear infinite;
        }
        
        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }
        
        /* Footer */
        .login-footer {
            text-align: center;
            margin-top: 40px;
            color: var(--secondary-color);
            font-size: 14px;
        }
        
        .login-footer a {
            color: var(--primary-color);
            text-decoration: none;
        }
        
        .login-footer a:hover {
            text-decoration: underline;
        }