       :root {
            --primary: #2c3e50;
            --secondary: #3498db;
            --success: #27ae60;
            --warning: #f39c12;
            --danger: #e74c3c;
            --light: #ecf0f1;
            --dark: #2c3e50;
        }
        
        body {
            background-color: #f8f9fa;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #2c3e50 0%, #3498db 100%);
        }
        
        .login-container {
            background-color: white;
            border-radius: 10px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
            overflow: hidden;
            width: 100%;
            max-width: 400px;
        }
        
        .login-header {
            background-color: var(--primary);
            color: white;
            padding: 30px 20px;
            text-align: center;
        }
        
        .login-header i {
            font-size: 3rem;
            margin-bottom: 15px;
        }
        
        .login-header h1 {
            font-size: 1.8rem;
            margin-bottom: 5px;
        }
        
        .login-header p {
            opacity: 0.8;
            margin-bottom: 0;
        }
        
        .login-body {
            padding: 30px;
        }
        
        .form-group {
            margin-bottom: 20px;
        }
        
        .form-control {
            border: 1px solid #e1e5eb;
            border-radius: 5px;
            padding: 12px 15px;
            transition: all 0.3s;
        }
        
        .form-control:focus {
            border-color: var(--secondary);
            box-shadow: 0 0 0 0.2rem rgba(52, 152, 219, 0.25);
        }
        
        .input-group-text {
            background-color: white;
            border: 1px solid #e1e5eb;
            border-right: none;
        }
        
        .input-group .form-control {
            border-left: none;
        }
        
        .input-group .form-control:focus {
            border-left: none;
        }
        
        .btn-login {
            background-color: var(--secondary);
            border: none;
            border-radius: 5px;
            color: white;
            font-weight: 600;
            padding: 12px;
            transition: all 0.3s;
            width: 100%;
        }
        
        .btn-login:hover {
            background-color: #2980b9;
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }
        
        .btn-login:active {
            transform: translateY(0);
        }
        
        .login-footer {
            text-align: center;
            padding: 20px;
            border-top: 1px solid #e1e5eb;
            background-color: #f8f9fa;
        }
        
        .login-footer a {
            color: var(--secondary);
            text-decoration: none;
        }
        
        .login-footer a:hover {
            text-decoration: underline;
        }
        
        .alert {
            border-radius: 5px;
            padding: 10px 15px;
            margin-bottom: 20px;
        }
        
        .password-toggle {
            cursor: pointer;
            color: #6c757d;
        }
        
        .password-toggle:hover {
            color: var(--dark);
        }
        
        /* Animation for form elements */
        .form-group {
            animation: fadeIn 0.5s ease forwards;
            opacity: 0;
        }
        
        .form-group:nth-child(1) {
            animation-delay: 0.1s;
        }
        
        .form-group:nth-child(2) {
            animation-delay: 0.2s;
        }
        
        .form-group:nth-child(3) {
            animation-delay: 0.3s;
        }
        
        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(10px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        /* Responsive adjustments */
        @media (max-width: 576px) {
            .login-container {
                margin: 20px;
                max-width: none;
            }
            
            .login-header {
                padding: 20px 15px;
            }
            
            .login-body {
                padding: 20px;
            }
        }