The CSS for the row/column borders provided in GalaxyAnvil

row-border-group.css

/* LAYOUT */
.user-css-presentation .user-css .row-border-group .user-row {
    display: flex;
}

.user-css-presentation .user-css .row-border-group .user-row .col-md-6 {
    border-left: 1px solid;
    border-right: 1px solid;
}

.user-css-presentation .user-css .row-border-group .user-row .col-md-4 {
    border-left: 1px solid;
    border-right: 1px solid;
    border-top: 1px solid;
    border-bottom: 1px solid;
}

.user-css-presentation .user-css .row-border-group .user-row .col-md-6:first-child {
    border-left: none;
}

.user-css-presentation .user-css .row-border-group .user-row .col-md-6:last-child {
    border-right: none;
}

.user-css-presentation .user-css .row-border-group .user-row:first-child .col-md-6 {
    border: none;
}

.user-css-presentation .user-css .row-border-group .user-row:last-child .col-md-6 {
    border: none;
}

.user-css-presentation .user-css .row-border-group .user-row .col-md-4:first-child {
    border-left: none;
    border-top: none;
    border-bottom: none;
}

.user-css-presentation .user-css .row-border-group .user-row .col-md-4:last-child {
    border-right: none;
    border-top: none;
    border-bottom: none;
}

.user-css-presentation .user-css .row-border-group .user-row:first-child .col-md-4 {
    border-top: none;
    border-left: none;
    border-right: none;
}

.user-css-presentation .user-css .row-border-group .user-row:last-child .col-md-4 {
    border-bottom: none;
    border-left: none;
    border-right: none;
}

.user-css-presentation .user-css .row-border-group .user-row .col-md-6:after, .user-css-presentation .user-css .row-border-group .user-row .col-md-6:before,
.user-css-presentation .user-css .row-border-group .user-row .col-md-4:after, .user-css-presentation .user-css .row-border-group .user-row .col-md-4:before
{
    content: url(https://www.worldanvil.com/uploads/images/d4222ca4f7e45bb789519bd04deb8449.gif);
    position: absolute;
}

.user-css-presentation .user-css .row-border-group .user-row:not(:first-child):not(:last-child) .col-md-6:first-child:after, /* 2-col Middle left cell, top border */
.user-css-presentation .user-css .row-border-group .user-row:not(:first-child):not(:last-child) .col-md-6:last-child:after, /* 2-col Middle right cell, top border */
.user-css-presentation .user-css .row-border-group .user-row:last-child .col-md-6:first-child:before, /* 2-col Bottom left cell, top border */
.user-css-presentation .user-css .row-border-group .user-row:last-child .col-md-6:last-child:before, /* 2-col Bottom right cell, top border */
.user-css-presentation .user-css .row-border-group .user-row:not(:first-child):not(:last-child) .col-md-4:first-child:after, /* 3-col Middle left cell, top border */
.user-css-presentation .user-css .row-border-group .user-row:not(:first-child):not(:last-child) .col-md-4:last-child:after, /* 3-col Middle right cell, top border */
.user-css-presentation .user-css .row-border-group .user-row:last-child .col-md-4:first-child:before, /* 3-col Bottom left cell, top border */
.user-css-presentation .user-css .row-border-group .user-row:last-child .col-md-4:last-child:before /* 3-col Bottom right cell, top border */
{
    left: 0;
    right: 0;
    top: 0;
    height: 1px;
}

.user-css-presentation .user-css .row-border-group .user-row:not(:first-child):not(:last-child) .col-md-6:first-child:before, /* 2-col Middle left cell, bottom border */
.user-css-presentation .user-css .row-border-group .user-row:not(:first-child):not(:last-child) .col-md-6:last-child:before, /* 2-col Middle right cell, bottom border */
.user-css-presentation .user-css .row-border-group .user-row:first-child .col-md-6:first-child:before, /* 2-col Top left cell, bottom border */
.user-css-presentation .user-css .row-border-group .user-row:first-child .col-md-6:last-child:before, /* 2-col Top right cell, bottom border */
.user-css-presentation .user-css .row-border-group .user-row:not(:first-child):not(:last-child) .col-md-4:first-child:before, /* 3-col Middle left cell, bottom border */
.user-css-presentation .user-css .row-border-group .user-row:not(:first-child):not(:last-child) .col-md-4:last-child:before, /* 3-col Middle right cell, bottom border */
.user-css-presentation .user-css .row-border-group .user-row:first-child .col-md-4:first-child:before, /* 3-col Top left cell, bottom border */
.user-css-presentation .user-css .row-border-group .user-row:first-child .col-md-4:last-child:before /* 3-col Top right cell, bottom border */
{
    left: 0;
    right: 0;
    bottom: 0;
    height: 1px;
}

.user-css-presentation .user-css .row-border-group .user-row:first-child .col-md-6:first-child:after, /* 2-col Top left cell, right border */
.user-css-presentation .user-css .row-border-group .user-row:last-child .col-md-6:first-child:after, /* 2-col Bottom left cell, right border */
.user-css-presentation .user-css .row-border-group .user-row:first-child .col-md-4:not(:first-child):not(:last-child):before, /* 3-col Top middle cell, right border */
.user-css-presentation .user-css .row-border-group .user-row:last-child .col-md-4:not(:first-child):not(:last-child):before, /* 3-col Bottom middle cell, right border */
.user-css-presentation .user-css .row-border-group .user-row:first-child .col-md-4:first-child:after, /* 3-col Top left cell, right border */
.user-css-presentation .user-css .row-border-group .user-row:last-child .col-md-4:first-child:after /* 3-col Bottom left cell, right border */
{
    top: 0;
    bottom: 0;
    right: 0;
    width: 1px;
}

.user-css-presentation .user-css .row-border-group .user-row:first-child .col-md-6:last-child:after, /* 2-col Top right cell, left border */
.user-css-presentation .user-css .row-border-group .user-row:last-child .col-md-6:last-child:after, /* 2-col Bottom right cell, left border */
.user-css-presentation .user-css .row-border-group .user-row:first-child .col-md-4:not(:first-child):not(:last-child):after, /* 3-col Top middle cell, left border */
.user-css-presentation .user-css .row-border-group .user-row:last-child .col-md-4:not(:first-child):not(:last-child):after, /* 3-col Bottom middle cell, left border */
.user-css-presentation .user-css .row-border-group .user-row:first-child .col-md-4:last-child:after, /* 3-col Top right cell, left border */
.user-css-presentation .user-css .row-border-group .user-row:last-child .col-md-4:last-child:after /* 3-col Bottom right cell, left border */
{
    top: 0;
    bottom: 0;
    left: 0;
    width: 1px;
}

.user-css-presentation .user-css .row-border-group .user-row:only-child .col-md-6:first-child:after, /* 2-col Single row left cell, right border */
.user-css-presentation .user-css .row-border-group .user-row:only-child .col-md-4:first-child:after, /* 3-col Single row left cell, right border */
.user-css-presentation .user-css .row-border-group .user-row:only-child .col-md-4:not(:first-child):not(:last-child):after /* 3-col Single row middle cell, right border */
{
    left: auto;
    right: 0;
    top: 0;
    bottom: 0;
    width: 1px;
}

.user-css-presentation .user-css .row-border-group .user-row:only-child .col-md-6:last-child:after, /* 2-col Single row right cell, left border */
.user-css-presentation .user-css .row-border-group .user-row:only-child .col-md-4:last-child:after, /* 3-col Single row right cell, left border */
.user-css-presentation .user-css .row-border-group .user-row:only-child .col-md-4:not(:first-child):not(:last-child):before /* 3-col Single row middle cell, left border */
{
    left: 0;
    right: auto;
    top: 0;
    bottom: 0;
    width: 1px;
}

.user-css-presentation .user-css .row-border-group .user-row:only-child .col-md-6:first-child:before,
.user-css-presentation .user-css .row-border-group .user-row:only-child .col-md-6:last-child:before,
.user-css-presentation .user-css .row-border-group .user-row:only-child .col-md-4:first-child:before,
.user-css-presentation .user-css .row-border-group .user-row:only-child .col-md-4:last-child:before
{
    display: none;
}

/* THEMEING */
.user-css-presentation .user-css .row-border-group .user-row .col-md-6,
.user-css-presentation .user-css .row-border-group .user-row .col-md-4
{
    border-color: var(--accentA);
}

.user-css-presentation .user-css .row-border-group .user-row:not(:first-child):not(:last-child) .col-md-6:first-child:after,
.user-css-presentation .user-css .row-border-group .user-row:not(:first-child):not(:last-child) .col-md-6:first-child:before,
.user-css-presentation .user-css .row-border-group .user-row:first-child .col-md-6:first-child:before,
.user-css-presentation .user-css .row-border-group .user-row:last-child .col-md-6:first-child:before,
.user-css-presentation .user-css .row-border-group .user-row:first-child .col-md-4:first-child:before, /* 3-col Top left cell, bottom border */
.user-css-presentation .user-css .row-border-group .user-row:not(:first-child):not(:last-child) .col-md-4:first-child:after, /* 3-col Middle left cell, top border */
.user-css-presentation .user-css .row-border-group .user-row:not(:first-child):not(:last-child) .col-md-4:first-child:before, /* 3-col Middle left cell, bottom border */
.user-css-presentation .user-css .row-border-group .user-row:last-child .col-md-4:first-child:before /* 3-col Bottom left cell, top border */
{
    background-image: linear-gradient(to right, var(--defaultAFullTransparent), var(--accentA));
}

.user-css-presentation .user-css .row-border-group .user-row:not(:first-child):not(:last-child) .col-md-6:last-child:after,
.user-css-presentation .user-css .row-border-group .user-row:not(:first-child):not(:last-child) .col-md-6:last-child:before,
.user-css-presentation .user-css .row-border-group .user-row:first-child .col-md-6:last-child:before,
.user-css-presentation .user-css .row-border-group .user-row:last-child .col-md-6:last-child:before,
.user-css-presentation .user-css .row-border-group .user-row:first-child .col-md-4:last-child:before, /* 3-col Top right cell, bottom border */
.user-css-presentation .user-css .row-border-group .user-row:not(:first-child):not(:last-child) .col-md-4:last-child:after, /* 3-col Middle right cell, top border */
.user-css-presentation .user-css .row-border-group .user-row:not(:first-child):not(:last-child) .col-md-4:last-child:before, /* 3-col Middle right cell, bottom border */
.user-css-presentation .user-css .row-border-group .user-row:last-child .col-md-4:last-child:before /* 3-col Bottom right cell, top border */
{
    background-image: linear-gradient(to left, var(--defaultAFullTransparent), var(--accentA));
}

.user-css-presentation .user-css .row-border-group .user-row:first-child .col-md-6:first-child:after,
.user-css-presentation .user-css .row-border-group .user-row:first-child .col-md-6:last-child:after,
.user-css-presentation .user-css .row-border-group .user-row:first-child .col-md-4:first-child:after, /* 3-col Top left cell, right border */
.user-css-presentation .user-css .row-border-group .user-row:first-child .col-md-4:not(:first-child):not(:last-child):after, /* 3-col Top middle cell, left border */
.user-css-presentation .user-css .row-border-group .user-row:first-child .col-md-4:not(:first-child):not(:last-child):before, /* 3-col Top middle cell, right border */
.user-css-presentation .user-css .row-border-group .user-row:first-child .col-md-4:last-child:after /* 3-col Top right cell, left border */
{
    background-image: linear-gradient(to bottom, var(--defaultAFullTransparent), var(--accentA));
}

.user-css-presentation .user-css .row-border-group .user-row:last-child .col-md-6:first-child:after,
.user-css-presentation .user-css .row-border-group .user-row:last-child .col-md-6:last-child:after,
.user-css-presentation .user-css .row-border-group .user-row:last-child .col-md-4:first-child:after, /* 3-col Bottom left cell, right border */
.user-css-presentation .user-css .row-border-group .user-row:last-child .col-md-4:not(:first-child):not(:last-child):after, /* 3-col Bottom middle cell, left border */
.user-css-presentation .user-css .row-border-group .user-row:last-child .col-md-4:not(:first-child):not(:last-child):before, /* 3-col Bottom middle cell, right border */
.user-css-presentation .user-css .row-border-group .user-row:last-child .col-md-4:last-child:after /* 3-col Bottom right cell, left border */
{
    background-image: linear-gradient(to top, var(--defaultAFullTransparent), var(--accentA));
}

.user-css-presentation .user-css .row-border-group .user-row:only-child .col-md-6:first-child:after,
.user-css-presentation .user-css .row-border-group .user-row:only-child .col-md-6:last-child:after,
.user-css-presentation .user-css .row-border-group .user-row:only-child .col-md-4:first-child:after, /* 3-col Single row left cell, right border */
.user-css-presentation .user-css .row-border-group .user-row:only-child .col-md-4:not(:first-child):not(:last-child):after, /* 3-col Single row middle cell, right border */
.user-css-presentation .user-css .row-border-group .user-row:only-child .col-md-4:last-child:after, /* 3-col Single row right cell, left border */
.user-css-presentation .user-css .row-border-group .user-row:only-child .col-md-4:not(:first-child):not(:last-child):before /* 3-col Single row middle cell, left border */
{
    background-image: linear-gradient(to top, var(--defaultAFullTransparent), var(--accentA), var(--defaultAFullTransparent));
}