wikimedia/mediawiki-core

.mw-widgets-rowWidget {
    clear: left;
    float: left;
    margin-bottom: -1px;
    width: 100%;
}

.mw-widgets-rowWidget-label {
    display: block;
    margin-right: 5%;
    padding-top: 0.5em;
    width: 35%;
}

.mw-widgets-rowWidget > .mw-widgets-rowWidget-label {
    float: left;
}

.mw-widgets-rowWidget > .mw-widgets-rowWidget-cells {
    float: left;
}

.mw-widgets-rowWidget > .mw-widgets-rowWidget-cells > .oo-ui-inputWidget {
    float: left;
    margin-right: -1px;
    width: 8em;
}

.mw-widgets-rowWidget > .mw-widgets-rowWidget-cells > .oo-ui-inputWidget > input,
.mw-widgets-rowWidget > .mw-widgets-rowWidget-delete-button > .oo-ui-buttonElement-button {
    margin: 0;
    border-radius: 0;
}