Limit Gallery Block Image Size

Site URL: https://www.rafida.org

Hey,

I'm trying to limit the maximum size of an image on mobile. 
This code used to work for image blocks, but not working for gallery blocks.
The reason I switched to a single image gallery rather than an image block is for the video lightbox function.

The image I'm trying to restrict is the large orange play button at the top of the home page.
Any idea why it's not working?

website: rafida.org
pass: lastphasetesting3

- Code provided below.
- Screenshot provided of single image gallery I'm trying to restrict on mobile

@media screen and (max-width:640px) {
div#block-yui_3_17_2_1_1600057330272_455 img {
    width: 50% !important;
    height: auto !important;
    transform: translateX(-50%);
    left: 50% !important;
    top: 0 !important;
}
div#block-yui_3_17_2_1_1600057330272_455 .image-block-wrapper {
    padding-bottom: 50% !important;
}
}

Add to Home > design > Custom CSS

/* Play icon mobile */
@media screen and (max-width:640px) {
div#block-yui_3_17_2_1_1600056103323_14741 {
    width: 50%;
    margin: 0 auto;
}
}

@tuanphan

Worked! Thanks a lot.