:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --secondary: #64748b;
            --success: #10b981;
            --danger: #ef4444;
            --light: #f8fafc;
            --dark: #1e293b;
            --gray: #94a3b8;
            --border: #e2e8f0;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }
        
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
        }
        
        .auth-container {
            display: flex;
            background: white;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
            min-height: 600px;
        }
        
        .auth-welcome {
            flex: 1;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: white;
            padding: 40px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            text-align: center;
        }
        
        .auth-welcome h2 {
            font-size: 2.2rem;
            margin-bottom: 20px;
        }
        
        .auth-welcome p {
            font-size: 1.1rem;
            opacity: 0.9;
            line-height: 1.6;
        }
        
        .auth-welcome-icon {
            font-size: 5rem;
            margin-bottom: 30px;
            opacity: 0.9;
        }
        
        .auth-form-container {
            flex: 1;
            padding: 40px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        
        .form-header {
            text-align: center;
            margin-bottom: 30px;
        }
        
        .form-header h2 {
            color: var(--dark);
            font-size: 2rem;
            margin-bottom: 10px;
        }
        
        .form-header p {
            color: var(--secondary);
        }
        
        .auth-form {
            width: 100%;
            max-width: 400px;
            margin: 0 auto;
        }
        
        .form-group {
            margin-bottom: 20px;
        }
        
        .form-group label {
            display: block;
            margin-bottom: 8px;
            color: var(--dark);
            font-weight: 500;
        }
        
        .input-with-icon {
            position: relative;
        }
        
        .input-with-icon i {
            position: absolute;
            left: 15px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--gray);
        }
        
        .input-with-icon input {
            padding-left: 45px;
        }
        
        .form-control {
            width: 100%;
            padding: 14px;
            border: 1px solid var(--border);
            border-radius: 8px;
            font-size: 16px;
            transition: all 0.3s;
        }
        
        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
        }
        
        .btn {
            display: block;
            width: 100%;
            padding: 14px;
            border: none;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .btn-primary {
            background: var(--primary);
            color: white;
        }
        
        .btn-primary:hover {
            background: var(--primary-dark);
        }
        
        .btn-secondary {
            background: white;
            color: var(--primary);
            border: 1px solid var(--border);
        }
        
        .btn-secondary:hover {
            background: #f1f5f9;
        }
        
        .form-footer {
            text-align: center;
            margin-top: 30px;
            color: var(--secondary);
        }
        
        .form-footer a {
            color: var(--primary);
            text-decoration: none;
            font-weight: 500;
        }
        
        .form-footer a:hover {
            text-decoration: underline;
        }
        
        .error-message {
            color: var(--danger);
            font-size: 14px;
            margin-top: 5px;
            display: none;
        }
        
        .success-message {
            color: var(--success);
            font-size: 14px;
            margin-top: 5px;
            display: none;
        }
        
        .secured-page {
            display: none;
            width: 100%;
            max-width: 800px;
            margin: 0 auto;
            background: white;
            border-radius: 16px;
            padding: 40px;
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
        }
        
        .secured-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 30px;
            padding-bottom: 20px;
            border-bottom: 1px solid var(--border);
        }
        
        .user-info {
            display: flex;
            align-items: center;
        }
        
        .user-avatar {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--primary);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: bold;
            margin-right: 15px;
        }
        
        .logout-btn {
            background: var(--danger);
            color: white;
            border: none;
            padding: 10px 20px;
            border-radius: 8px;
            cursor: pointer;
            font-weight: 500;
            transition: all 0.3s;
        }
        
        .logout-btn:hover {
            background: #dc2626;
        }
        
        .dashboard-content {
            margin-top: 30px;
        }
        
        .dashboard-content h2 {
            color: var(--dark);
            margin-bottom: 20px;
        }
        
        .stats-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            margin-top: 30px;
        }
        
        .stat-card {
            background: #f8fafc;
            border-radius: 12px;
            padding: 20px;
            text-align: center;
        }
        
        .stat-card i {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 15px;
        }
        
        .stat-card h3 {
            font-size: 1.8rem;
            margin-bottom: 5px;
            color: var(--dark);
        }
        
        .stat-card p {
            color: var(--secondary);
        }
        
        @media (max-width: 900px) {
            .auth-container {
                flex-direction: column;
            }
            
            .auth-welcome {
                padding: 30px 20px;
            }
            
            .auth-form-container {
                padding: 30px 20px;
            }
        }