:root {
            --primary: #0066cc;
            --primary-light: #e6f2ff;
            --dark: #1a1a1a;
            --light: #f8f9fa;
            --gray: #6c757d;
            --danger: #dc3545;
            --border: #dee2e6;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Inter', sans-serif;
            background-color: var(--light);
            color: var(--dark);
            line-height: 1.6;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        .auth-container {
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
            padding: 40px 0;
        }
        
        .auth-card {
            background: white;
            border-radius: 10px;
            box-shadow: var(--shadow);
            width: 100%;
            max-width: 500px;
            overflow: hidden;
        }
        
        .auth-header {
            background: var(--primary);
            color: white;
            padding: 20px;
            text-align: center;
        }
        
        .auth-header h1 {
            font-size: 24px;
            font-weight: 600;
        }
        
        .auth-body {
            padding: 30px;
        }
        
        .form-group {
            margin-bottom: 20px;
        }
        
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
            color: var(--dark);
        }
        
        .form-control {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid var(--border);
            border-radius: 5px;
            font-size: 16px;
            transition: border 0.3s;
        }
        
        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px var(--primary-light);
        }
        
        .btn {
            display: inline-block;
            background: var(--primary);
            color: white;
            border: none;
            padding: 12px 20px;
            border-radius: 5px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 500;
            text-align: center;
            transition: background 0.3s;
            width: 100%;
        }
        
        .btn:hover {
            background: #0052a3;
        }
        
        .text-center {
            text-align: center;
        }
        
        .mt-3 {
            margin-top: 15px;
        }
        
        .text-muted {
            color: var(--gray);
        }
        
        .text-danger {
            color: var(--danger);
        }
        
        .alert {
            padding: 15px;
            border-radius: 5px;
            margin-bottom: 20px;
        }
        
        .alert-success {
            background: #d4edda;
            color: #155724;
        }
        
        .alert-danger {
            background: #f8d7da;
            color: #721c24;
        }
        
        .login-link {
            color: var(--primary);
            text-decoration: none;
        }
        
        .login-link:hover {
            text-decoration: underline;
        }