A:link    { color: blue; text-decoration: none; }
A:visited { text-decoration: none }
h1 {text-align: center }
h2 {color: #800080; text-align: center}
h3 {color: #800000; }
h4 { margin-top: 1em; }
strong { font-weight: bold; color: darkblue; }
strong.feature {color: #00008B; font-weight: bold }
p.copyright { text-align: right; }
p.formula { text-align: center; }
th { background-color: white; width: 20%; }