AVENUE Template | CSS for hover title and subtitle | Font too big in mobile devices

Site URL: http://www.orensoffer.com/

Hey I’m looking to see what this person used for CSS for the title and subtitles that are shown when you hover above the images. 

Also I like to know how I can keep my font small and contained inside the image when I get on the website with a mobile device. Whenever I look at the website in my iPhone, the title becomes too big and overlaps with others.

Add to Design > Custom CSS

@media screen and (max-width:640px) {
.project-title *, .project-title {
    font-size: 9px !important;
}
}