portfolio Adding a card border to portfolio image thumbnails?

Hi!

I would love some help with CSS on this.
Would love for the portfolio page titles to have that pink background on (as pictured) as well as a 'see project' button on the right side of the title. 

Not sure if it's also possible to have the projects be staggered, instead of next to each other? 

SITE URL: https://violet-raccoon-bag5.squarespace.com/moje-prace
Password: juliawebsite123

Appreciate any help with this.

Add to Website Tools (under Not Linked) > Custom CSS

h3.portfolio-title:after {
    content: "View project";
}
h3.portfolio-title {
    display: flex;
    justify-content: space-between;
    background-color: pink;
}
.portfolio-text {
    background-color: pink;
    margin: 0 !important;
    padding-top: 10px;
    padding-left: 5px;
    padding-right: 5px;
}