r: white;
            padding: 20px;
        }
        
        .footer a {
            color: #fff;
            text-decoration: none;
        }
        
        .footer a:hover {
            text-decoration: underline;
        }
        
        .loading {
            display: none;
            text-align: center;
            margin: 20px 0;
        }
        
        .spinner-border {
            color: var(--vietmap-primary);
        }
        
        @media (max-width: 576px) {
            .container 