html {
	Background-color: antiquewhite;
	Color: darkslategray;
}
body {
	Font-family: sans-serif;
	Width: 90ex;
	Max-width: 90%;
	Margin: 3ex auto;
	Line-height: 1.6em;
}
main {
	Padding: 3ex;
	Color: midnightblue;
	Background-color: oldlace;
	Box-shadow: 0.5ex 0.5ex 0.5ex tan;
	Font-size: large;
}
nav, footer { Margin: 1em; Font-weight: bold; Text-align: center; }

h1 {
	Font-size: 3em;
	Font-family: serif;
	Font-weight: normal;
	Text-decoration: double underline;
	Line-height: 1.2em;
}
header, h1, h2, h3 { Text-align: center; }
        
a { Color: dodgerblue; }
a:visited { Color: darkred; }
a:hover, a:active { Color: deepskyblue; }

li a, dt a, sup { Font-weight: bold; }

blockquote {
	Background-color: ghostwhite;
	Padding: 1ex;
}
pre { Max-width: 100%; Overflow: auto; }