MediaWiki:Common.css

.wikitable,
.prettytable {
 margin: 1em 1em 1em 0;
 background: #f9f9f9;
 border: 1px #AAA solid;
 border-collapse: collapse;
 empty-cells:show;
}

.wikitable th, .wikitable td,
.prettytable th, .prettytable td {
 border: 1px #AAA solid;
 padding: 0.3em;
}

.wikitable caption,
.prettytable caption {
 font-weight: bold;
}