HTML {background:#e8e8e8;}
BODY {background-image: linear-gradient(135deg, #c0c0c0, #f8f8f8);;margin:25px; padding:25px;}
.center {text-align:center;}
.red {color:#ff0000;}
.bordered {margin: 1ex; border-width: thin; border-color: black; border-style: solid; padding: 1ex}