html,body{height:100%;width:100%;overflow:hidden;margin:0}body{padding:1em;display:flex;flex-direction:column;align-content:center;align-items:center;justify-content:flex-start;flex-wrap:wrap;margin-top:5%}summary{text-align:center}footer{position:fixed;text-align:center;width:100%;height:max-content;bottom:10%}#sub,#sub:empty{display:none}#sub:not(:empty){display:inline;color:#fff;background-color:#000;padding:5px;font-size:larger}