style.css

@media (max-width: 720px) {
	#mainpage-outertext {
		margin-left:10px !important;
	}
	#mainpage-innertext {
		margin-right: auto !important;
		font-size: x-small !important;
	}
	#mainpage-section-mb {
		margin-right: auto !important;
	}
	
	#mainpage-topbanner {
		min-width: auto !important;
		margin-left: auto !important;
	}
	
	#mainpage-site-heading {
		font-size: xx-large !important;
	}
	
	#sbl-breadcrumbs {
		display: none;
	}
}