#grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));padding:3em 1em 0;margin-bottom:10rem}aside{grid-column:span 3 / span 3;margin-left:auto;width:100%;max-width:320px}main{grid-column:span 6 / span 86;max-width:75ch;margin-inline:auto;width:100%}div#rightSidebar{grid-column:span 3 / span 3;margin-right:auto;position:sticky;display:flex;top:0;height:100vh}aside,main,div#rightSidebar{padding:0 1.5em}