.nav ul.main {
	position: absolute;
	display: block;
}
.nav ul.main .column {
	visibility: hidden;
	opacity: 0;
	-webkit-transition: all .15s ease-in-out;
	-moz-transition: all .15s ease-in-out;
	-o-transition: all .15s ease-in-out;
	transition: all .15s ease-in-out;
}
.nav li:hover ul.main .column {
	visibility: visible;
	opacity: 1;
	-webkit-transition: all .35s ease-in-out;
	-moz-transition: all .35s ease-in-out;
	-o-transition: all .35s ease-in-out;
	transition: all .35s ease-in-out;
	-webkit-transition-delay: 300ms;
	-moz-transition-delay: 300ms;
	-o-transition-delay: 300ms;
	transition-delay: 300ms;
}