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✏️ Editing: _sticky-top-bar.scss

@import "wp-admin-colors";
@import "ui-constants";

$ameStickyBarZIndex: 5;
$ameStickyBarBaseTopPadding: $defaultActorSelectorTopMargin;
$ameStickyBarBaseBottomPadding: $largeActorSelectorToUiGap - 1px; //-1 for the border.
$ameStickyBarPinnedPadding: 16px;

/*
 * The minimum screen width at which the sticky bar will be sticky.
 * The Admin Bar stops sticking to the top of the window at 600px. Let's do the same for our top bar.
 */
$ameStickyBarMinScreenWidth: 601px;

.ame-sticky-top-bar {
	padding-top: $ameStickyBarBaseTopPadding;
	padding-bottom: $ameStickyBarBaseBottomPadding;
	border-bottom: 1px solid transparent;
	display: block;
}

@media screen and (min-width: $ameStickyBarMinScreenWidth) {
	.ame-sticky-top-bar {
		position: sticky;
		//Stick below the admin bar.
		top: calc(var(--wp-admin--admin-bar--height, 32px));
		z-index: $ameStickyBarZIndex;

//To prevent sudden jumps when the bar becomes pinned, set the top padding to the pinned
		//value early but compensate for it with a negative margin. This way it looks like the bar
		//has the base top padding until it becomes pinned. It also gets pinned earlier, when the
		//invisible top edge is reached.
		padding-top: $ameStickyBarPinnedPadding;
		margin-top: #{$ameStickyBarBaseTopPadding - $ameStickyBarPinnedPadding};
		//However, this makes the bar partially overlap the elements above it, so we need to
		//disable pointer events on the bar to stop it interfering with those elements.
		pointer-events: none;

//Re-enable pointer events for children. Otherwise, they apparently inherit the disabled
		//state.
		> * {
			pointer-events: auto;
		}
	}

.ame-sticky-top-bar.ame-is-pinned-top-bar {
		background-color: wpColor(gray-0);
		border-bottom: 1px solid wpColor(gray-10);
		box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);

pointer-events: auto;

//Like with the top padding, use a negative margin to prevent jumps when the bar
		//becomes pinned and the bottom padding changes.
		padding-bottom: $ameStickyBarPinnedPadding;
		margin-bottom: #{$ameStickyBarBaseBottomPadding - $ameStickyBarPinnedPadding};
	}

//When the bar is pinned, expand it horizontally to fill the content area.
	.ame-is-pinned-top-bar {
		margin-left: calc(-1 * var(--ame-sticky-bar-left-offset, 0));
		padding-left: var(--ame-sticky-bar-left-offset, 0);

margin-right: calc(-1 * var(--ame-sticky-bar-right-offset, 0));
		padding-right: var(--ame-sticky-bar-right-offset, 0);
	}
}

.ame-sticky-top-bar-flex-content {
	display: flex;
	flex-direction: row;
	flex-wrap: nowrap;
	align-items: center;
}

.ame-sticky-top-bar #ws_actor_selector {
	//When inside the sticky bar, the top spacing is handled by the bar itself.
	margin-top: 0;
}

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