:root:has(#popover-menu:popover-open) body {
	overflow: hidden;
	pointer-events: none;
	user-select: none;
	touch-action: none;
}

::view-transition-group(navbar) {
	z-index: 9999;
	animation: none;
}

::view-transition-old(navbar) {
	display: none;
}

::view-transition-group(nav-popover) {
	display: none;
}

#navbar {
	position: fixed;
	inset: 0;
	inset-block-end: auto;
	block-size: 5rem;
	padding-inline-start: 3rem;
	padding-inline-end: 2.5rem;
	pointer-events: none;
	view-transition-name: navbar;
	--main_nav-background: light-dark(var(--bright_white), var(--black));
	z-index: 1000;

	@media (max-width: 45rem) {
		padding-inline-start: 0.8rem;
		padding-inline-end: 0.3rem;

		&:has(.toc-button) {
			padding-inline-start: 0.3rem;
		}
	}

	> nav {
		display: flex;
		align-items: center;
		justify-content: end;
		block-size: 100%;
		text-transform: uppercase;
		font-size: clamp(0.9rem, 0.7rem + 2vi, 1.3rem);

		> a,
		> button {
			filter: drop-shadow(0 0 1rem var(--main_nav-background)) drop-shadow(0 0 0.1rem var(--main_nav-background));
		}

		a {
			padding: 0.5rem;
			text-decoration: none;
			pointer-events: all;
			color: currentColor;
		}

		svg {
			block-size: 1.65rem;
			fill: currentColor;
		}

		.search-nav svg {
			block-size: 1.4rem;
		}

		#navlanding {
			font-weight: 700;
		}

		ul,
		li {
			margin: 0;
			list-style: none;
		}

		button {
			pointer-events: all;
			background: none;
			font-size: 1.75rem;

			&:hover {
				color: inherit;
			}
		}

		.toc-button {
			display: none;
			margin-inline-end: auto;
		}

		#popover-menu {
			pointer-events: auto;
			overflow-y: auto;
			overscroll-behavior: none;
			touch-action: pan-y;

			inline-size: fit-content;
			block-size: 100dvb;
			inset-inline-start: auto;
			border: none;
			background: linear-gradient(transparent, var(--red));
			backdrop-filter: blur(1.5rem);
			color: light-dark(var(--black), var(--bright_white));
			box-shadow: -0.5rem 0 2rem oklch(from var(--black) l c h / 0.4);
			view-transition-name: nav-popover;
			transition:
				opacity 0.25s,
				transform 0.25s;

			@starting-style {
				transform: translateX(1rem);

				&:dir(rtl) {
					transform: translateX(-1rem);
				}
			}

			@media (max-width: 45rem) {
				inline-size: 100%;

				@starting-style {
					opacity: 0;
					transform: translateY(1rem);
				}
			}

			&::backdrop {
				background: oklch(from light-dark(var(--bright_white), var(--black)) l c h / 0.4);
			}

			button {
				position: absolute;
				inset-block-start: 1rem;
				inset-inline-end: 2.2rem;
				padding: 0.8rem;

				@media (max-width: 45rem) {
					inset-inline-end: 0;
				}
			}

			ul {
				justify-content: center;
				max-block-size: 100%;
				margin-block: 4rem;
				margin-inline: 3rem;
				font-size: 2rem;
				font-weight: 700;
				text-align: end;

				li {
					inline-size: 100%;
				}

				a {
					display: block;
					padding-block: 1.25rem;
				}

				@media (max-width: 45rem) {
					margin-block: 4rem;
					margin-inline: 0.8rem;
					text-align: center;
				}
			}
		}
	}

	.skip-link {
		position: absolute;
		inset-block-start: 0;
		inset-inline-start: 0;
		padding: 0.5rem;
		margin: 1rem;
		background: light-dark(var(--white), var(--grey));
		transform: translateY(calc(-100% - 2rem));
		transition: transform 0.1s;
		z-index: calc(infinity);

		&:focus-within {
			transform: translateY(0%);
		}
	}

	&::after {
		content: "";
		position: absolute;
		inset-block-start: 0;
		inset-inline-start: 0;
		inline-size: 100%;
		block-size: 100%;
		background: linear-gradient(
			180deg,
			color-mix(in oklch, var(--main_nav-background) 100%, transparent) 0%,
			color-mix(in oklch, var(--main_nav-background) 45%, transparent) 25%,
			color-mix(in oklch, var(--main_nav-background) 15%, transparent) 50%,
			color-mix(in oklch, var(--main_nav-background) 5%, transparent) 75%,
			color-mix(in oklch, var(--main_nav-background) 0%, transparent) 100%
		);
		z-index: -1;
	}
}

#scroll-container {
	display: none; /* Set to block in JS */
	position: sticky;
	inset-block-start: 3rem;
	block-size: calc(100vb - 6rem);
	inline-size: 2px;
	background-color: light-dark(var(--white), var(--grey));
	z-index: 1000;

	#indicator {
		position: absolute;
		inset-inline-start: -0.5px;
		inline-size: 3px;
		background-color: var(--magenta);
		min-block-size: 5%;
	}

	nav:not(#toc-menu) ol li {
		position: absolute;
		margin: 0;
		list-style-type: none;

		&::marker {
			content: "";
		}

		&::after {
			content: "";
			position: absolute;
			margin-inline-start: -0.5px;
			inline-size: 5px;
			block-size: 5px;
			background-color: light-dark(var(--bright_white), var(--black));
		}

		a {
			position: absolute;
			text-decoration: none;
			color: currentColor;
		}
	}

	@media (max-width: 45rem) {
		position: fixed;
		inset: 0 0 auto;
		block-size: 4px;
		inline-size: 100%;

		#indicator {
			block-size: 100%;
		}
	}
}

.heading-label {
	background: linear-gradient(to bottom, transparent, light-dark(var(--bright_white), var(--black)) 0.5rem);
	margin-block-start: -0.6rem;
	padding-block-start: 0.6rem;
	opacity: 0;
	visibility: hidden;
	transition:
		opacity 0.25s ease,
		visibility 0.25s;
}

.heading-label,
.scroll-percentage {
	display: block;
	inline-size: 8rem;
	margin-inline-start: 1rem;
	line-height: 1;
	font-size: 0.8rem;
	visibility: hidden;
	opacity: 0;
	filter: blur(0.5rem);
	transition:
		visibility 0.25s ease,
		opacity 0.25s ease,
		filter 0.25s ease;
}

.sidebar {
	margin-inline-end: -3rem;
	padding-inline-end: 3rem;

	&:focus-within :where(.heading-label, .scroll-percentage),
	&:hover :where(.heading-label, .scroll-percentage) {
		visibility: visible;
		opacity: 1;
		filter: none;
	}
}

#toc-menu {
	inline-size: 100%;
	block-size: fit-content;
	max-height: 40%;
	padding: 1rem;
	border: none;
	background: linear-gradient(transparent, light-dark(var(--bright_white), var(--black)));
	backdrop-filter: blur(1.5rem);
	color: light-dark(var(--black), var(--bright_white));

	.horizontal-percentage {
		font-size: 0.9rem;
		height: 1.95rem;
		align-content: center;
	}

	.header-list-link a {
		&[aria-current="true"] {
			font-weight: bold;
		}

		&::after {
			display: none;
		}
	}

	.close {
		position: fixed;
		inset-block-start: 1rem;
		inset-inline-end: 1rem;
		background: oklch(from var(--grey) l c h / calc(alpha - 0.5));
		padding: 0.1rem;

		svg {
			block-size: 1.75rem;
			fill: var(--bright_white);
		}
	}
}

@media (max-width: 45rem) {
	html:has(#toc-menu:popover-open) {
		margin-block-start: var(--toc-height);
		scroll-padding-top: calc(var(--toc-height) + 2rem);
	}

	#scroll-container:has(#toc-menu:popover-open) {
		inset-block-start: var(--toc-height);
	}
}

@media print {
	#navbar,
	#scroll-container,
	.sidebar {
		display: none;
	}
}