Multicolumn Photos TOO BIG on mobile view

[EC23]

I have multicolumns on all my collection pages and the photos look great on desktop, BUT on the mobile view the photos are TOO LARGE.  How can I reduce the photos sizes on mobile view only(without affecting desktop view)?

Using Dawn theme........eminentcrowns.com

[Dawood_Mirza_ · Accepted solution]

Add this code in custom CSS 
adjust the height, width and margin accordingly
These will work perfectly for only images in multicolumn 

@media only screen and (max-width: 768px) {
.multicolumn-card {
height: 200px;
width: 200px;
margin: auto;
margin-bottom : 100px;
}
}

Tell me If it worked!!

[EC23]

Worked perfectly...Thank you!