themes-wordpress/spearhead/assets/sass/_header.scss

$admin-bar-height: 46px;
$site-branding-height: 68px;

.has-main-navigation { // to override seedlet
	.site-header {
		padding: var(--global--spacing-vertical) 0;

		@include media( laptop ) {
			padding: var(--global--spacing-vertical) var(--global--spacing-horizontal);
		}

		a {
			text-decoration: none;
		}

		@include media( laptop-only ) {

			.site-title {
				margin: 0;
			}

			.site-description {
				display: none;
			}
		}
	}
}

.has-sticky-post .site-header {
	background: var(--sticky-posts--color-background);
}

.site-header {
	display: grid;
	grid-template-areas:
		"site-logo site-logo site-logo"
		"branding branding primary-navigation";
	grid-template-columns: 0.5fr 1fr 0.5fr;
	grid-template-rows: auto;
	grid-column-gap: 16px;
	max-width: var(--responsive--alignfull-width);
	padding: var(--global--spacing-vertical) 0;

	@include media( laptop ) {
		grid-template-areas:
			"site-logo site-logo site-logo"
			"branding primary-navigation primary-navigation";
		padding: var(--global--spacing-vertical) var(--global--spacing-horizontal);
	}

	.site-branding {
		grid-area: branding;
		padding: var(--global--spacing-horizontal);
		text-align: left;
		justify-self: flex-start;
		align-self: center;

		@include media( laptop ) {
			padding: 0;
		}

		.site-logo {
			margin-left: 0;
			margin-top: 0;
		}

		.site-title {
			margin-bottom: 4px;

			> a {
				background: inherit;
				text-decoration: none;
				text-shadow: none;
			}
		}
	}

	.site-logo {
		grid-area: site-logo;
		margin: 0;

		a {
			display: block;

			&:hover {
				border-color: transparent;
			}
		}
	}

	.primary-navigation-wrapper {
		margin-bottom: 6px;
	}

	.primary-navigation {
		margin-top: 0;
		position: relative;

		@include media( laptop-only ) { // TODO - use $navigation-max-break-point variable
			.primary-menu-container {

				.admin-bar & {
					top: $site-branding-height + $admin-bar-height;
				}

				a {
					color: var(--primary-nav--dropdown-color-link);
				}
			}

			.social-navigation a {
				color: var(--primary-nav--dropdown-color-link);
			}
		}

		button#primary-close-menu {
			color: var(--global--color-secondary);
			margin: 0;
			margin-top: 0.25rem;
			padding: var(--global--spacing-horizontal);
			position: relative;
			top: 0;
			right: 0;
			float: right;

			.has-marketing-bar & {
				top: calc(-1 * var(--wpcom-marketing-bar--height));
			}

			.admin-bar & {
				top: calc(-1 * var(--wpadmin-bar--height));
			}

			.admin-bar.has-marketing-bar & {
				top: calc(calc(-1 * var(--wpadmin-bar--height)) + calc(-1 * var(--wpcom-marketing-bar--height)));
			}

			&:hover {
				color: var(--global--color-primary);
			}
		}
	}

	.primary-navigation .menu-item-has-children > .svg-icon {
		margin-top: -2px;
		margin-left: -2px;
	}


	.primary-navigation > div > ul li,
	.woo-navigation > div > ul li {
		color: var(--global--color-secondary);

		a:hover {
			border-color: transparent;
			color: var(--global--color-primary);
		}
	}

	> .site-branding,
	> nav {
		margin: 0;
	}

	.social-navigation {
		flex-basis: 100%;

		ul {
			justify-content: flex-start;
			flex-wrap: nowrap;
			margin-top: var(--social-nav--padding);

			li {
				margin: 0;
				padding: 0 var(--social-nav--padding) 0 0;
			}

		}

		@include media( laptop ) {
			flex-basis: auto;

			ul {
				justify-content: flex-end;
				margin-top: 0;

				li {
					padding: 0 0 0 var(--social-nav--padding);
				}
			}
		}

		.menu-item {
			width: auto;

			> a {
				padding: 0;

				&:hover {
					border-color: var(--primary-nav--color-border);
					color: var(--primary-nav--color-link-hover);
				}
			}
		}
	}
}

.has-title-and-tagline {

	.site-logo {
		margin: 0;

		@include media( laptop ) {
			padding-bottom: var(--global--spacing-vertical);
		}
	}

	.site-branding {
		align-self: flex-start;
	}
}

.primary-navigation-open {

	.site-header {
		padding-top: 0;
	}

	.has-title-and-tagline .site-logo {
		display: none;
	}
}

.site-header div.menu-button-container {

	button#primary-open-menu {
		padding: var(--global--spacing-horizontal);
		margin-top: 0;
		margin-right: 0;

		&::before {
			margin: 0;
		}
	}

	#woo-open-menu {
		margin-left: auto;
	}

	.primary-navigation-open & {
		margin: 0;
	}
}