/* Your existing CSS remains exactly the same */
        
        .signup-btn {
            background: #1a1a1a;
            color: white;
            padding: 0.5rem 1.5rem;
            border-radius: 6px;
            font-weight: 500;
            transition: all 0.3s ease;
        }
        
        .signup-btn:hover {
            background: #333;
            color: white;
            transform: translateY(-1px);
            box-shadow: 0 4px 8px rgba(0,0,0,0.1);
        }
        
        .auth-section {
            padding: 140px 0 80px;
            background: #fafafa;
            min-height: 100vh;
            display: flex;
            align-items: center;
        }
        
        .auth-container {
            max-width: 400px;
            margin: 0 auto;
            padding: 0 20px;
            width: 100%;
        }
        
        .auth-card {
            background: white;
            padding: 3rem 2.5rem;
            border-radius: 12px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
            border: 1px solid #f0f0f0;
        }
        
        .auth-card h2 {
            text-align: center;
            margin-bottom: 2rem;
            color: #1a1a1a;
            font-size: 1.8rem;
            font-weight: 700;
        }
        
        .form-group {
            margin-bottom: 1.5rem;
        }
        
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            color: #4a4a4a;
            font-weight: 500;
        }
        
        .form-group input {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid #e0e0e0;
            border-radius: 8px;
            font-size: 1rem;
            transition: all 0.3s;
            background: #fafafa;
        }
        
        .form-group input:focus {
            outline: none;
            border-color: #1a1a1a;
            background: white;
            box-shadow: 0 0 0 3px rgba(26, 26, 26, 0.1);
        }
        
        .btn-primary:hover:not(:disabled) {
            background: #333;
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        
        .btn-primary:disabled {
            background: #666;
            cursor: not-allowed;
            opacity: 0.7;
        }
        
        .auth-links {
            margin-top: 2rem;
            text-align: center;
        }
        
        .auth-links p {
            margin-bottom: 0.5rem;
            color: #666;
        }
        
        .auth-links a {
            color: #1a1a1a;
            text-decoration: none;
            font-weight: 500;
            transition: color 0.3s;
        }
        
        .auth-links a:hover {
            color: #333;
            text-decoration: underline;
        }
        
        .message {
            margin-top: 1rem;
            padding: 1rem;
            border-radius: 8px;
            text-align: center;
        }
        
        .success {
            background: #d1fae5;
            color: #065f46;
            border: 1px solid #a7f3d0;
        }
        
        .error {
            background: #fee2e2;
            color: #991b1b;
            border: 1px solid #fecaca;
        }
        
        .warning {
            background: #fef3c7;
            color: #92400e;
            border: 1px solid #fde68a;
        }
        
        .info {
            background: #dbeafe;
            color: #1e40af;
            border: 1px solid #bfdbfe;
        }
        
        .password-toggle {
            position: relative;
        }
        
        .toggle-password {
            position: absolute;
            right: 12px;
            top: 50%;
            transform: translateY(-50%);
            background: none;
            border: none;
            color: #666;
            cursor: pointer;
            font-size: 0.9rem;
            padding: 4px 8px;
        }
        
        .alert {
            padding: 12px 16px;
            border-radius: 8px;
            margin-bottom: 1rem;
            display: flex;
            align-items: flex-start;
            gap: 10px;
        }
        
        .alert-icon {
            font-size: 1.2rem;
            flex-shrink: 0;
            margin-top: 2px;
        }
        
        .alert-content {
            flex: 1;
        }
        
        .alert-title {
            font-weight: 600;
            margin-bottom: 4px;
        }
        
        .alert-message {
            font-size: 0.9rem;
            opacity: 0.9;
        }
        
        .spinner {
            display: inline-block;
            width: 16px;
            height: 16px;
            border: 2px solid rgba(255,255,255,.3);
            border-radius: 50%;
            border-top-color: white;
            animation: spin 1s ease-in-out infinite;
            margin-right: 8px;
            vertical-align: middle;
        }
        
        @keyframes spin {
            to { transform: rotate(360deg); }
        }
        
        @media (max-width: 768px) {
            
            .auth-section {
                padding: 120px 0 60px;
            }
            
            .auth-card {
                padding: 2rem 1.5rem;
            }
            
            .auth-card h2 {
                font-size: 1.5rem;
            }
        }