CSS to change appearance of #section on smaller screen sizes

Site URL: https://www.kerndesignlab.com

I'm trying to do two things:

First, I'd like to get the section#featured-project (on the homepage) to appear the same on a large resolution monitor as on a 13-inch laptop -- meaning I'd like the featured image to bleed to the bottom edge of the section container, which it does not do on a laptop screen.

Second, I'd like to get the section#featured-project (on the homepage) to appear the same on tablet screens as on mobile screens -- meaning I'd like it to stack, which it does not do on a tablet screen.

I've tried multiple different sets of code in the design>CSS, but nothing seems to be working. I'm not sure what I should be targeting, a block, a page, a section, etc. I'd appreciate any help. Thanks.

Q1. You mean like this?

Add to Design > Custom CSS

/* featured */
section#featured-project>div {
    width: 100%;
    margin-left: 0;
    margin-right: 0;
    max-width: 100%;
}

Q2. Add to Design > Custom CSS

/* featured tablet mobile */
@media screen and (max-width:900px) {
div#page-60564f79ca24454a73152ec1 .span-12 .row {
    display: flex;
    flex-direction: column-reverse;
    justify-content: center;
    align-items: center;
}
div#page-60564f79ca24454a73152ec1 .span-12 .row .col {
    width: 100%;
}
}