Make spacers visible and adjust height for mobile

Site URL: https://www.madebydot.tv/

I'd like to add some space between each project on my website's home page when viewing it on mobile.

At the moment there's not much differentiation/gap between each project as we keep scrolling down.

How do I turn the spacers on and define a minimum height just for the home page?

@tuanphan

Add to Design > Custom CSS

/* space between projects mobile */
@media screen and (max-width:640px) {
div#page-5fdeee8cc18bd5077cac6b50 .button-block {
    margin-bottom: 50px;
}
}