@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&display=swap');
        
        body {
            font-family: 'Poppins', sans-serif;
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
        }
        
        .auth-container {
            background: white;
            border-radius: 20px;
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
            overflow: hidden;
            width: 100%;
            max-width: 420px;
            transition: all 0.3s ease;
        }
        
        .auth-container:hover {
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
            transform: translateY(-5px);
        }
        
        .tab-button {
            transition: all 0.3s ease;
            position: relative;
        }
        
        .tab-button.active {
            color: #8b5cf6;
        }
        
        .tab-button.active:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: #8b5cf6;
            border-radius: 3px 3px 0 0;
            animation: underline 0.3s ease-out;
        }
        
        @keyframes underline {
            from { transform: scaleX(0); }
            to { transform: scaleX(1); }
        }
        
        .form-input {
            transition: all 0.3s ease;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
        }
        
        .form-input:focus {
            box-shadow: 0 5px 15px rgba(139, 92, 246, 0.1);
            border-color: #8b5cf6;
        }
        
        .btn-primary {
            background: linear-gradient(135deg, #8b5cf6 0%, #6d28d9 100%);
            transition: all 0.3s ease;
            box-shadow: 0 4px 6px rgba(139, 92, 246, 0.2);
        }
        
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 7px 14px rgba(139, 92, 246, 0.3);
        }
        
        .btn-social {
            transition: all 0.3s ease;
        }
        
        .btn-social:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
        }
        
        .divider {
            display: flex;
            align-items: center;
            text-align: center;
            color: #9ca3af;
        }
        
        .divider::before, .divider::after {
            content: "";
            flex: 1;
            border-bottom: 1px solid #e5e7eb;
        }
        
        .divider::before {
            margin-right: 1rem;
        }
        
        .divider::after {
            margin-left: 1rem;
        }
        
        .role-btn {
            transition: all 0.3s ease;
        }
        
        .role-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
        }
        
        .hidden {
            display: none;
        }
        
        .fade-in {
            animation: fadeIn 0.5s ease-in;
        }
        
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }