Hi,
u can easly achive it with flexbox. Just define in your container display to flex, flex direction as a column and for elements property flex-grow to 1 what expand your items to container height (so u need to specify your container height (here e.g. 150px)).
Working example below:
.cs-btn-print, .cs-btn-nprint{
background-color: #0071bd;
color: white;
width: 100%;
padding:1rem;
border-radius: 0.5rem;
}
.col-md {
height:150px;
display:flex;
flex-direction: column;
}
.col-md button {
flex-grow: 1;
}
<div class="col-md">
<div class="row"></div>
<button id="" type="button" class="cs-btn-print">Print</button>
<button id="" type="button" class="cs-btn-nprint">Non-Print</button>
</div>
Cheers