body { font-family: Verdana, Arial, Helvetica, sans-serif; }
section, header, nav, article, footer { display: block; padding: 5px;}
section { width: 999px; margin: 5px auto; border: solid 1px silver; }
header { height: 133px; background: silver;}
nav { float: left; width: 200px; }
article { line-height: 1.7; padding-left: 220px; background: url('twocolors.jpg') repeat-y }
aside { display: block; float: right;}
footer { clear: both; height: 20px;  background: silver; }

header h1 { color: white;}
header h2 { color: gray;}
nav ul { line-height: 2; list-style-type: none; }
article h1 { font-size: 1.3em; }
article ul { list-style-image: url('dot.gif'); }
mark { background-color: yellow; }
time { border-bottom-style: dotted; border-bottom-width: 1px; }
mark2{ color: gray;}
mark3{ color: green;}