Add a CTA button in Menu

I am trying to add a CTA button in the menu which has green background and and white text

Here’s the code:

.cta-button {
	-moz-box-shadow:inset 0px 1px 0px 0px #9acc85;
	-webkit-box-shadow:inset 0px 1px 0px 0px #9acc85;
	box-shadow:inset 0px 1px 0px 0px #9acc85;
	background:-webkit-gradient(linear, left top, left bottom, color-stop(0.05, #74ad5a), color-stop(1, #68a54b));
	background:-moz-linear-gradient(top, #74ad5a 5%, #68a54b 100%);
	background:-webkit-linear-gradient(top, #74ad5a 5%, #68a54b 100%);
	background:-o-linear-gradient(top, #74ad5a 5%, #68a54b 100%);
	background:-ms-linear-gradient(top, #74ad5a 5%, #68a54b 100%);
	background:linear-gradient(to bottom, #74ad5a 5%, #68a54b 100%);
	filter:progid:DXImageTransform.Microsoft.gradient(startColorstr='#74ad5a', endColorstr='#68a54b',GradientType=0);
	background-color:#74ad5a;
	border:1px solid #3b6e22;
	display:inline-block;
	cursor:pointer;
	color:#ffffff;
	padding:6px 12px;
	text-decoration:none;
}
.cta-button:hover {
	background:-webkit-gradient(linear, left top, left bottom, color-stop(0.05, #68a54b), color-stop(1, #74ad5a));
	background:-moz-linear-gradient(top, #68a54b 5%, #74ad5a 100%);
	background:-webkit-linear-gradient(top, #68a54b 5%, #74ad5a 100%);
	background:-o-linear-gradient(top, #68a54b 5%, #74ad5a 100%);
	background:-ms-linear-gradient(top, #68a54b 5%, #74ad5a 100%);
	background:linear-gradient(to bottom, #68a54b 5%, #74ad5a 100%);
	filter:progid:DXImageTransform.Microsoft.gradient(startColorstr='#68a54b', endColorstr='#74ad5a',GradientType=0);
	background-color:#68a54b;
}
.cta-button:active {
	position:relative;
	top:1px;
}

I have added this to quick css and added the class from menu.

However I don’t see any change at all. How do I accomplish this?