CSS background cover mobile iOS fix

style.scss

/** 
 * This applies to Genesis Blocks that have
 * a 'fixed' background image applied.
 */
.gb-has-parallax {

	/** 
	 * This is the fix for mobile (iOS). 
	 * It displays as a normal background image which fills
	 * the container and scrolls with the content.
	 */
	background-attachment: scroll;
	
	/**
	 * Keep the normal fixed behavior for larger screens.
	 */
	@include media-breakpoint-up(md) {
		background-attachment: fixed;
	}

}

/* Also ensure the .site-inner element does not have any transform applied. */
.site-inner {
	transform: none;
}