Common.css

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/***** CSS placed here will be applied to/* default skin for navigation boxes */
table.navbox {            /* navbox container style */
  border: 1px solid #aaa;
  width: 100%; 
  margin: auto;
  clear: both;
  font-size: 88%;
  text-align: center;
  padding: 1px;
}
table.navbox + table.navbox {
  margin-top: -1px;        /* single pixel border between adjacent navboxes (doesn't work for IE6, but that's okay) */
}
.navbox-title, .navbox-abovebelow, table.navbox th {
  text-align: center;      /* title and above/below styles */
  padding-left: 1em;
  padding-right: 1em;
}
.navbox-group {           /* group style */
  white-space: nowrap;
  text-align: right;
  font-weight: bold;
  padding-left: 1em;
  padding-right: 1em;
}
.navbox, .navbox-subgroup {
  background: #fdfdfd;     /* Background color */
}
.navbox-list {
  border-left: 2px solid #fdfdfd;   /* Must match background color */
}
.navbox-title, table.navbox th {
  background: #ccccff;     /* Level 1 color */
}
.navbox-abovebelow, .navbox-group, .navbox-subgroup .navbox-title {
  background: #ddddff;     /* Level 2 color */
}
.navbox-subgroup .navbox-group, .navbox-subgroup .navbox-abovebelow {
  background: #e6e6ff;     /* Level 3 color */
}
.navbox-even {
  background: #f7f7f7;     /* Even row striping */
}
.navbox-odd {
  background: transparent; /* Odd row striping */
}
 
@media print {
    .navbox {
        display: none;
    }
}

.nowraplinks a { /* prevents line breaks in links in primarily navbox */
    white-space: nowrap;
}

MediaWiki

Common.css