MediaWiki:Citizen.css

/* All CSS here will be loaded for users of the Citizen skin */
.citizen-body a.image:hover > img {
  transform: scale(1) !important;
}

.wikitable > tr > th, .wikitable > * > tr > th {
    background-color: #eaecf0;
    text-align: center;
}

.wikitable > tr > th, .wikitable > tr > td, .wikitable > * > tr > th, .wikitable > * > tr > td {
    border: 1px solid #a2a9b1;
    padding: 0.2em 0.4em;
}

th {
    display: table-cell;
    vertical-align: inherit;
    font-weight: bold;
    text-align: -internal-center;
}