:root {
	--transition-duration: 500ms;
	--transition-easing: cubic-bezier(0.77, 0, 0.18, 1);
	--transition-color: #000;
}

html::before {
	content: "";
	position: fixed;
	inset: 0;
	z-index: 2147483647;
	background: var(--transition-color);
}

html.transition-ready::before {
	display: none;
}

.page-transition {
	position: fixed;
	inset: 0;
	z-index: 2147483647;
	pointer-events: none;
	overflow: hidden;
}

.page-transition.is-transitioning {
	pointer-events: auto;
}

.page-transition__bar {
	position: absolute;
	left: 0;
	width: 100%;
	height: 50vh;
	background: var(--transition-color);
	transition: transform var(--transition-duration) var(--transition-easing);
	will-change: transform;
}

.page-transition__bar--top {
	top: 0;
	transform: translateY(0);
}

.page-transition__bar--bottom {
	bottom: 0;
	transform: translateY(0);
}

.page-transition.is-open .page-transition__bar--top {
	transform: translateY(-100%);
}

.page-transition.is-open .page-transition__bar--bottom {
	transform: translateY(100%);
}

@media (prefers-reduced-motion: reduce) {
	.page-transition__bar {
		transition-duration: 1ms;
	}
}