.portals-section{background-image:url(/images/topography.svg);background-size:auto;background-position:50%;background-repeat:repeat}html{scroll-behavior:smooth}.fade{transition:opacity .5s ease-in-out}.fade-in{opacity:1}.fade-out{opacity:0}.hero{margin-top:calc(-1*var(--header-height, 0px));padding-top:var(--header-height,0);background-size:cover;background-position:50%;background-image:linear-gradient(rgba(0,0,0,.5),transparent),url(/images/homepage/background.jpeg)}