/* Add a right-side border to a container within a grid column. 

Class= right-border-container
*/

@media (min-width: 768px) {
    /* Step 1 — targets the grid COLUMN that wraps your container */
    .col:has(.right-border-container) {
        align-self: stretch !important;
        display: flex;
        flex-direction: column;
    }

    /* Step 2 — targets your inner container */
    .right-border-container {
        flex: 1;
        border-right: 1px solid #bfbfbf;
    }
}