styles.css

#sidebox {width:40%; float:right; margin:10px 0 10px 20px; border:none}

#sidebox .mw-editsection {display:none}

#sidebox h2 {background:#f1f3f9; margin:0; padding:2px 10px; font-size:1rem}

#sidebox h3 {margin:0; font-size:1rem; border-bottom:1px solid #818181}

#sidebox > div {flex-basis:100%; padding:0 14px}

.maincol h2 {margin-top:0;}