MediaWiki:Common.css

/* CSS placed here will be applied to all skins */

table {
 border-collapse: collapse;
 border-spacing: 0px;
}
td, th {
 border: solid 1px silver;
 vertical-align: top;
 text-align: left;
 padding: 0.2em;
}
.firstcolfixed td:first-child {
 font-family: monospace;
 color: red;
}
th {
 font-weight: bold;
}