body { background: silver; color: black; margin-left: 2em; margin-right: 2em;  }
h1 { background: teal; color: white; }
h2 { background: silver; color: blue; }
h3 { background: silver; color: black; }
h4 { background: teal; color: white; }
p { line-height: 1.5em; }
table, td, th { border-width: 2px; border-style: solid; border-color: lightsalmon; }
th { background: aquamarine; }
td { background: honeydew; }