cerebrate/webroot/scss/custom.scss

$secondary: #6c757d !default;
$translateX: calc(1.5rem * -.5 + 5px);
$rectHeight: calc(100% + 4px);
$borderRadius: 3px;

.multi-metafields-container {
    position: relative; 

    @include media-breakpoint-up(sm) {
        &::before {
            content: none !important;
        }
    }
    &::before {
        border-style: solid;
        border-color: $secondary;
        border-width: 2px 0px 2px 2px;
        border-radius: 3px 0px 0px 3px;
        opacity: 0.5;
        position: absolute;
        content: ' ';
        width: 0.5rem;
        height: calc(100% - 33px);
        transform: translate(0px, 18px);
    }

    // @include media-breakpoint-up(sm) {
    //     &::before {
    //         content: none !important;
    //     }
    // }
    // &::before {
    //     content: ' ';
    //     background-color: $secondary;
    //     opacity: 0.5;
    //     position: absolute;
    //     width: 0.25rem;
    //     transform: translate(5px, 10px);
    //     height: calc(100% - 17px);
    //     border-radius: $borderRadius;
    // }

    & > .multi-metafield-container {
        position: relative;

        & > .multi-metafield-input-container::before {
            content: ' ';
        }

        @include media-breakpoint-up(sm) {
           & > .multi-metafield-input-container::before {
                background-color: $secondary;
                opacity: 0.5;
                position: absolute;
                width: 0.25rem;
                transform: translateX($translateX);
                height: $rectHeight;
           }
        }

        &:first-child > .multi-metafield-input-container::before {
            border-top-left-radius: $borderRadius;
            border-top-right-radius: $borderRadius;
        }

        &:last-child > .multi-metafield-input-container::before {
            border-bottom-left-radius: $borderRadius;
            border-bottom-right-radius: $borderRadius;
            height: 100%;
        }
    }
}