div{margin:1em 0}#topButtons{margin:0;display:grid;grid-template-columns:auto auto}#topButtons div{margin:0}#renderCheckDiv{justify-self:center}#topButtons label{position:absolute;left:70%}#IO{display:flex;height:80vh;margin-top:1ex}textarea,pre,iframe{border:1px solid #000;margin:0;padding:2px;font-size:1em;overflow:scroll;white-space:pre-wrap;resize:horizontal;width:50%}#regexDIV{display:grid;grid-template-columns:40% auto 40%;justify-items:center}#firstRegexDIV{display:flex;flex-direction:row;flex-wrap:wrap}#matchbox{padding-right:1em}#flags label{padding:0 .5ex}#regexDIV div{margin:0}label{font-weight:700}label abbr{color:red;font-size:90%;padding-left:.5ex}#helpPopover{position:absolute;top:25%;left:50%;transform:translate(-50%)}#helpPopover button{float:right}