[Plugin: WordPress Popular Posts] Changing Font Size of Post Title

I had this working before the last update, but for some reason I can’t remember how I adjusted the Post Title font. Below is what I am currently trying. The font-size:20px; for the title style is not working. Any suggestions?

/* title styles */
.wpp-post-title {
font-size:20px;
}

/* thumbnail styles */
img.wpp-thumbnail {
float: left;
text-align: left;
padding-right: 5px;
}

/* excerpt styles */
.wpp-excerpt {
}