body { background: snow;
color : black;
margin-left: 10em;
margin-right: 10em;
margin-top: 3em;
}
h1 { background: steelblue; color : white; font-size: 1.7em; }
h2 { font-size: 1.2em; }
table, th, td {
border-style: solid;
border-color: silver;
border-collapse: collapse;
background-color: lightgrey;
}
th {
text-align: left;
}