Custom Font for Portfolio/Project Title

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

I was able to use CSS to custom the font for header and h1 to h5 text, but for some reason can't seem to change the font for my portfolio header title (the text that appears on top of pictures that are linked to a different page). I was hoping someone could help me with the code for that

Add to Design > Custom CSS

h3.portfolio-title {
    font-size: 30px !important;
    color: red !important;
    font-family: monospace !important;
}