MediaWiki:Common.css

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

/* Remove the page title from specific pages */
body.page-Main_Page h1#firstHeading {
    display: none !important;
}
body.page-Palette h1#firstHeading {
    display: none !important;
}

/* Use class="wikitable timeline" to apply
.timeline table {
    border: none;
}
.timeline tr td,
.timeline tr {
    border: none;
}
*/

.timeline table {
    border: 1px solid black;   /* Outer border for the entire table */
    border-collapse: collapse; /* Ensures borders are consistent */
}

.timeline tr td,
.timeline tr th {
    border-left: 1px solid black;  /* Keeps left border */
    border-right: 1px solid black; /* Keeps right border */
}

.timeline tr:first-child th,
.timeline tr:last-child td {
    border-top: 1px solid black;    /* Top border for the first row */
    border-bottom: 1px solid black; /* Bottom border for the last row */
}