body{background-color:#ff8c00;font-family:monospace;font-size:150%;display:block;margin:auto;width:55%}header{border-bottom:1px solid #222;margin-bottom:1rem}footer{border-top:1px solid #222;margin-top:1rem}a{color:blue;text-decoration:none}section{background-color:orange;margin-left:auto;margin-right:auto;margin-top:1rem;margin-bottom:1rem;padding:2rem}div.center{display:block;margin:auto;width:50%}p.center,img.center,ul.center{display:block;margin-left:auto;margin-right:auto;width:50%}