@mixin _oHeaderMegaMenu() {
	@keyframes o-header-mega {
		0% {
			opacity: 0;
		}
		100% {
			opacity: 1;
		}
	}

	.o-header__mega {
		@include oPrivateTypographySans(0);
		@include oPrivateVisualEffectsShadowContent('low');
		display: none;
		position: absolute;
		top: 100%;
		left: oPrivateGridGutter('L');
		right: oPrivateGridGutter('L');
		z-index: $_o-header-mega-z-index;
		box-sizing: border-box;
		padding: $_o-header-mega-padding-y 0;
		border-top: 1px solid _oHeaderGet('header-border');
		background-color: _oHeaderGet('mega-menu-background');

		&[aria-expanded="true"],
		// core experience fallback
		[data-o-header--no-js] :hover > & {
			display: block;
		}
	}

	.o-header__mega--animation {
		animation: o-header-mega 0.5s ease-out;
	}

	.o-header__mega-wrapper {
		display: table;
		table-layout: fixed;
		width: 100%;
		// no margins for table cells... also so we avoid using :last-child for old IE
		border-spacing: $_o-header-mega-padding-x 0;
		margin-left: $_o-header-mega-padding-x * -1;
	}

	.o-header__mega-column {
		display: table-cell;
		padding-left: $_o-header-mega-padding-x;
		border-left: 1px solid _oHeaderGet('header-border');

		&:first-child {
			border-left: 0;
			padding-left: 0;
		}
	}

	.o-header__mega-column--articles {
		.o-header__mega-item {
			&:before {
				@include oPrivateIconsContent(
					'arrow-right',
						oPrivateFoundationGet('o3-color-palette-claret-60'),
					$size: $_o-header-icon-size-small
				);
				vertical-align: text-top;
				content: '';
			}
		}

		.o-header__mega-link {
			white-space: none;
		}
	}

	.o-header__mega-column--subsections {
		width: 30%;

		.o-header__mega-list {
			columns: 2;
		}

		.o-header__mega-item {
			&:first-child {
				font-weight: 600;
			}
		}
	}

	.o-header__mega-heading {
		margin: 0 0 $_o-header-padding-y;
		font-size: inherit;
		text-transform: uppercase;
	}

	.o-header__mega-list {
		margin: 0;
		padding: 0;
		list-style: none;
	}

	.o-header__mega-item {
		line-height: 1.5;
	}

	.o-header__mega-link {
		@include _oHeaderLink();

		&:hover {
			text-decoration: underline;
		}
	}
}