wikimedia/mediawiki-core

.mw-special-BlockList {
    .oo-ui-fieldsetLayout-group {
        max-width: 50em;
    }

    .oo-ui-layout {
        &.mw-field-block-type,
        &.mw-field-limit.mw-has-field-block-type {
            display: inline-block;
            width: 50%;
            box-sizing: border-box;
            margin-top: 0;
        }

        &.mw-field-block-type {
            padding-right: 1em;
        }
    }

    .mw-blocklist-hidden {
        color: #72777d;
    }
}