From SPCodex, The Smashing Pumpkins wiki
.infobox {
border: 1px solid #a2a9b1;
border-spacing: 3px;
background-color: #f8f9fa;
color: black;
/* @noflip */
margin: 0.5em 0 0.5em 1em;
padding: 0.2em;
/* @noflip */
float: right;
/* @noflip */
clear: right;
font-size: 88%;
line-height: 1.5em;
}
.infobox caption {
font-size: 125%;
font-weight: bold;
padding: 0.2em;
text-align: center;
}
.infobox td,
.infobox th {
vertical-align: top;
/* @noflip */
text-align: left;
}
.infobox.bordered {
border-collapse: collapse;
}
.infobox.bordered td,
.infobox.bordered th {
border: 1px solid #a2a9b1;
}
.infobox.bordered .borderless td,
.infobox.bordered .borderless th {
border: 0;
}
.infobox.sisterproject {
width: 20em;
font-size: 90%;
}
.infobox.standard-talk {
border: 1px solid #c0c090;
background-color: #f8eaba;
}
.infobox.standard-talk.bordered td,
.infobox.standard-talk.bordered th {
border: 1px solid #c0c090;
}
/* styles for bordered infobox with merged rows */
.infobox.bordered .mergedtoprow td,
.infobox.bordered .mergedtoprow th {
border: 0;
border-top: 1px solid #a2a9b1;
/* @noflip */
border-right: 1px solid #a2a9b1;
}
.infobox.bordered .mergedrow td,
.infobox.bordered .mergedrow th {
border: 0;
/* @noflip */
border-right: 1px solid #a2a9b1;
}