how to set up font in submenu in hamburger menu themyfy code example

Example: menu berger in themyfy doesnt work

/* reset mobile menu */
@media screen and (max-width: 480px) {

	#menu-icon {
		display: none;
	}
	#main-nav-wrap {
		position: static;
	}
	
	/* main nav */
	#main-nav {
		position: inherit;
		width: auto !important;
		padding: 0;
		display: block;
		background: none !important;
		border: none !important;
		
		box-shadow: none;
		border-radius: none;
	}
	#main-nav li {
		clear: none !important;
		float: left !important;
		margin: 0 5px 0 0 !important;
		padding: 0 0 7px !important;
		position: relative;
		display: inline-block;
		zoom:1;
		*display:inline;
	}
	
	/* sub-levels link */
	#main-nav ul a  {
		padding: 6px 0 6px 15px !important;
		margin: 0 !important;
		width: 180px !important;
	}
	
	/* sub-level ul */
	#main-nav ul {
		width: 190px !important;
		margin: 0 !important;
		padding: 5px 0 !important;
		position: absolute;
		left: -4px;
		top: 28px;
		background: #fff;
		border: solid 1px #ddd;
		border-bottom-color: #bbb;
		z-index: 100;
		display: none;
	}
	#main-nav ul li {
		background: none;
		padding: 0;
		margin: 0;
		display: block;
		float: none !important;
	}
	
	/* sub-sub-level dropdown */
	#main-nav ul ul {
		left: 190px;
		top: -2px;
	}
	
	/* show dropdown ul on hover */
	#main-nav li:hover > ul {
		display: block;
	}

}
/* end reset mobile menu */