How do I get the same height of text blocks, can't chose section-id

Site URL: https://easy-recall.com/mitdir

Hi, 

I can't figure out,  how to set my two text blocks (next to each other) having the same height. In this template I can't find the section-id to target the code. I also tried markdown blocks, but then I don't know how to get it into two coloums. 

It looks fine while in the edit-mode, but I don't know why that is. 

Help is highly appreciated.

Add to Design > Custom CSS

@media screen and (min-width:768px) {
div#block-yui_3_17_2_1_1644078124047_196328+.row {
    display: flex;
}
div#block-yui_3_17_2_1_1644078124047_196328+.row>.span-4 {
    flex: 1;
    border: 8px dashed #60213e;
}
div#block-yui_3_17_2_1_1644078124047_196328+.row>.span-4 .html-block {
    border: none;
}
div#block-yui_3_17_2_1_1644078124047_196328+.row .span-4:last-child {
    border: 8px dashed #006271;
}
}