focalboard/webapp/src/components/viewHeader.scss

.ViewHeader {
    flex: 0 0 auto;
    display: flex;
    flex-direction: row;

    border-bottom: solid 1px rgba(var(--main-fg), 0.16);
    margin-bottom: 10px;
    padding: 10px 10px;
    color: #909090;

    > div {
        margin-right: 5px;
        white-space: nowrap
    }
}