Increasing Font In Menu

Hello- I am trying to increase the font in the menu, but I can’t seem to find the font size in the CSS. The site is https://blacksnowmedia.com/soc/.

Below is the CSS that relates to the main nav, in case it helps. I am new at this, but my best guess is that the ‘[class^=”icon-“]’ regulates the properties of the nav, but this icon class is throughout my CSS and I want to only change the navigation. any insight is appreciated

‘.main-navigation ul {
padding-top: 20px;
text-align:right;
}
.main-navigation ul li {
display: inline-table;
float: none;
border-right: 1px solid #ccc;
margin-top:5px;
}
.main-navigation ul li a {
padding-left: 15px;
padding-right: 15px;
}
.main-navigation a {
font-weight:normal;
}
.main-navigation ul li.current-menu-item > a, .main-navigation ul li.current-menu-item > a [class^=”icon-“] {
color: #99AC28;