.scrollable-container {
    width: auto; /* Adjust width as needed */
    height: 600px; /* Adjust height as needed.  Without a defined height, there won't be a scrollbar */
    overflow-y: auto; /*  This will enable the scrollbar */
    border: 1px solid black; /* Optional, just for visibility */
}

/*.reveal {*/
/*    background-color: pink;*/
/*    width: 100%;*/
/*    height: 600px; !* or 80vh, or 100vh if you want fullscreen *!*/
/*}*/