Module:Infobox/styles.css

/* == Infobox Core Styles == */

.infobox-subbox {
    padding: 0;
    border: none;
    margin: -3px;
    width: auto;
    min-width: 100%;
    font-size: 100%;
    clear: none;
    float: none;
    background-color: transparent;
}

.infobox-3cols-child {
    margin: auto;
}

.infobox .navbar {
    font-size: 100%;
}

/* == Infobox Header Styling (Larger + Themed) == */

.infobox .infobox-header {
    font-size: 115%; /* 15% bigger */
    padding: 0.6em;
    background-color: #ff4fa1;
    color: #ffffff;
    font-weight: bold;
    text-align: center;
}

/* == Dark Mode Support: Manual preference (MediaWiki user settings) == */
@media screen {
    html.skin-theme-clientpref-night .infobox .infobox-header {
        background-color: #a63a78 !important;
        color: #f8f9fa !important;
    }

    html.skin-theme-clientpref-night .infobox-full-data:not(.notheme) > div:not(.notheme)[style] {
        background: #1f1f23 !important;
        color: #f8f9fa !important;
    }
}

/* == Dark Mode Support: OS preference (prefers-color-scheme) == */
@media screen and (prefers-color-scheme: dark) {
    html.skin-theme-clientpref-os .infobox .infobox-header {
        background-color: #a63a78 !important;
        color: #f8f9fa !important;
    }

    html.skin-theme-clientpref-os .infobox-full-data:not(.notheme) div:not(.notheme) {
        background: #1f1f23 !important;
        color: #f8f9fa !important;
    }
}

/* == Responsive Infobox Table Fixes (Vector 2022 skin) == */

@media (min-width: 640px) {
    body.skin--responsive .infobox-table {
        display: table !important;
    }
    body.skin--responsive .infobox-table > caption {
        display: table-caption !important;
    }
    body.skin--responsive .infobox-table > tbody {
        display: table-row-group;
    }
    body.skin--responsive .infobox-table tr {
        display: table-row !important;
    }
    body.skin--responsive .infobox-table th,
    body.skin--responsive .infobox-table td {
        padding-left: inherit;
        padding-right: inherit;
    }
}