Neuro Pro 3 Themes How Change font size in post title?

Hi
I’v just bought Neuro Pro Theme, I don’t know how change font size in post title, it’s too big. Check:
wychowaniefizyczne.net

I search is style css, but could find, where can i find this?

/*==================================== POST AND PAGE CONTENT ===========================================*/

.entry-header {
margin-top: 0;
}

.entry-summary {
margin: 10px 0;
}

.postformats {
float: right;
}

.postformats .glyphicon {
color: #ccc;
margin-top: 5px;
margin-left: 15px;
}

blockquote {
margin: 20px 10px;
padding: 3px;
background-color: #cccccc;
}

blockquote p {
margin: 10px;
}

blockquote cite {
font-size: 0.4em;
}

blockquote cite:before {
position: relative;
top: -2px;
margin: 0 5px;
content: ‘ ̶ ‘;
}

.page-links {
clear: both;
}

.more-content {
margin-bottom: 15px;
padding: 10px;
border: 1px solid #dddddd;
background: #ffffff;
}

.previous-post {
margin-top: 5px;
margin-bottom: 0;
padding-bottom: 0;
text-align: left;
}

.next-post {
margin-top: 5px;
margin-bottom: 0;
padding-bottom: 0;
text-align: right;
}

Where can i find font size of post title?