Hello,

Can you please add some valid WP credentials in your profile data extra fields? So we can give this a closer look. 
Read this article for more information.

Best regards!

Hello,

I added this code into your Custom Css box in Customize > General > Custom Codes:

@media (max-width: 480px){
#footer-wrapper.reveal {
    position: relative !important;
	}
main#main {
    margin-bottom: 0 !important;
}
}

Please check your site and let me know.

Best regards!