fieldSelector.css

.slds-modal__content {
    min-height: 50%;    
}
.fldsel-modal__container{
    width: 50%;    
    margin: 0 auto;    
    min-width: 20rem;
    max-width: none;
}

.label {    
    color: rgb(0, 112, 210);
    font-size: .875rem;
    text-decoration: none;
    outline-offset: -4px;
    display: inline-block;
}

a:hover {
    text-decoration: none !important;
}

.assistiveText {
    position: absolute!important;
    height: 1px;
    width: 1px;
    overflow: hidden;
    clip: rect(1px,1px,1px,1px);
}

.referenceDetailContent {
    margin-top: 1.5rem;
    padding: 1rem;
    border: 1px solid rgb(217, 219, 221);
}
.referenceIcon {
    display: inline-block;
    height: 50px;
    width: 50px;
    border-radius: 5px;
    border: 1px solid rgb(0, 112, 210);
    background-color: rgb(0, 112, 210);
    background-size: 46px;
    background-repeat: no-repeat;
    background-position: 2px 2px;
    background-image: url(/projRes/ui-process-builder-components/processuirule/img/actions/folder.png);
}