five-for-the-future/themes/pub/wporg/css/components/_site-header.scss

.site-header {
	background: $color__wp-blue;
	padding: 1rem 0;
	position: relative;

	.site-branding {
		margin: 0 auto;
		max-width: 960px;
		padding: 0 ms( 4 );

		@include breakpoint( $ms-breakpoint ) {
			padding: 0 10px;
		}
	}

	&.home {
		padding: ms( 4 ) ms( 1 );
		text-align: center;
	}
}