/*
 * Infinity Linkers Smart TOC
 * Everything visual runs on the --iltoc-* custom properties set on .iltoc.
 * Override the properties (or these classes) from your own CSS.
 */

:where(h2, h3)[id] {
	scroll-margin-top: var(--iltoc-offset, 80px);
}

.iltoc-wrap {
	margin: 1.75em 0;
}

.iltoc {
	box-sizing: border-box;
	max-width: 100%;
	padding: var(--iltoc-pad, 20px 24px);
	border: var(--iltoc-border-width, 1px) solid var(--iltoc-border, #ececf1);
	border-radius: var(--iltoc-radius, 16px);
	background: var(--iltoc-bg, #f6f6f8);
	box-shadow: var(--iltoc-shadow, none);
	color: var(--iltoc-text, #1f2328);
	font-family: var(--iltoc-font-body, inherit);
	font-size: var(--iltoc-link-size, 0.95rem);
	line-height: 1.45;
	text-align: start;
}

.iltoc *,
.iltoc *::before,
.iltoc *::after {
	box-sizing: border-box;
}

/* Title ------------------------------------------------------------- */

.iltoc .iltoc__title {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 12px;
	margin: 0 0 12px;
	padding: 0;
	color: var(--iltoc-muted, #6b7280);
	font-family: var(--iltoc-font-title, inherit);
	font-size: var(--iltoc-title-size, 0.78rem);
	font-weight: 700;
	line-height: 1.3;
	letter-spacing: 0.08em;
	text-transform: uppercase;
}

.iltoc label.iltoc__title {
	cursor: default;
	pointer-events: none;
}

.iltoc--no-title .iltoc__title-text,
.iltoc .iltoc__check {
	position: absolute;
	width: 1px;
	height: 1px;
	margin: -1px;
	padding: 0;
	overflow: hidden;
	border: 0;
	clip-path: inset(50%);
	white-space: nowrap;
}

.iltoc .iltoc__check {
	opacity: 0;
}

.iltoc .iltoc__check:focus-visible + .iltoc__title {
	outline: 2px solid var(--iltoc-accent, #4f46e5);
	outline-offset: 4px;
}

.iltoc .iltoc__icon,
.iltoc .iltoc__chevron {
	display: none;
	flex: none;
}

.iltoc .iltoc__chevron {
	width: 0.6em;
	height: 0.6em;
	margin: -0.2em 0.2em 0;
	border: solid currentColor;
	border-width: 0 2px 2px 0;
	transform: rotate(45deg);
	transition: transform 0.2s ease;
}

/* List -------------------------------------------------------------- */

.iltoc .iltoc__list {
	margin: 0;
	padding: 0;
	list-style: none;
	counter-reset: iltoc;
}

.iltoc .iltoc__item {
	margin: 0;
	padding: 0;
	list-style: none;
	break-inside: avoid;
}

.iltoc .iltoc__item + .iltoc__item {
	margin-top: var(--iltoc-gap, 2px);
}

.iltoc .iltoc__link {
	display: flex;
	align-items: baseline;
	gap: 0.65em;
	margin: 0 -10px;
	padding: 7px 10px;
	border-radius: min(var(--iltoc-radius, 16px), 10px);
	color: inherit;
	font-weight: 500;
	text-decoration: none;
	box-shadow: none;
	transition: background-color 0.15s ease, color 0.15s ease;
}

.iltoc .iltoc__link:hover,
.iltoc .iltoc__link:focus {
	color: var(--iltoc-accent, #4f46e5);
	text-decoration: none;
}

.iltoc .iltoc__link:focus-visible {
	outline: 2px solid var(--iltoc-accent, #4f46e5);
	outline-offset: 2px;
}

.iltoc .iltoc__link.is-active {
	background: var(--iltoc-active-bg, rgba(79, 70, 229, 0.1));
	color: var(--iltoc-active-text, #4338ca);
	font-weight: 600;
}

.iltoc .iltoc__text {
	min-width: 0;
	overflow-wrap: anywhere;
}

.iltoc .iltoc__list--sub {
	margin: var(--iltoc-gap, 2px) 0 0;
	padding-inline-start: 1.1em;
	font-size: 0.94em;
	counter-reset: iltoc-sub;
}

/* Numbering --------------------------------------------------------- */

.iltoc--numbered .iltoc__item {
	counter-increment: iltoc;
}

.iltoc--numbered .iltoc__link::before {
	flex: none;
	min-width: 1.6em;
	color: var(--iltoc-accent, #4f46e5);
	content: counter(iltoc, decimal-leading-zero);
	font-size: 0.82em;
	font-weight: 700;
	font-variant-numeric: tabular-nums;
}

.iltoc--numbered .iltoc__list--sub .iltoc__item {
	counter-increment: iltoc-sub;
}

.iltoc--numbered .iltoc__list--sub .iltoc__link::before {
	content: counter(iltoc) "." counter(iltoc-sub);
}

.iltoc--numbered .iltoc__link.is-active::before {
	color: inherit;
}

/* Layout: pills ------------------------------------------------------ */

.iltoc--pills .iltoc__list {
	display: flex;
	flex-wrap: wrap;
	gap: 8px;
}

.iltoc--pills .iltoc__item,
.iltoc--pills .iltoc__list--sub {
	display: contents;
}

.iltoc--pills .iltoc__link {
	align-items: center;
	min-height: 44px;
	margin: 0;
	padding: 8px 16px;
	border: 1px solid var(--iltoc-border, #ececf1);
	border-radius: 999px;
	background: color-mix(in srgb, var(--iltoc-text, #1f2328) 4%, transparent);
	font-size: 0.94em;
}

.iltoc--pills .iltoc__link:hover {
	border-color: var(--iltoc-accent, #4f46e5);
}

.iltoc--pills .iltoc__link.is-active {
	border-color: transparent;
}

/* Presets (structure only — colours come from the variables) -------- */

.iltoc--preset-minimal-line {
	border-width: 0 0 0 3px;
	border-left-color: var(--iltoc-accent, #4f46e5);
}

.iltoc--preset-bold-outline {
	--iltoc-border-width: 2px;
}

.iltoc--preset-bold-outline .iltoc__title {
	letter-spacing: 0.12em;
}

.iltoc--preset-dark {
	--iltoc-button-text: var(--iltoc-bg);
}

.iltoc--preset-glass {
	-webkit-backdrop-filter: blur(16px) saturate(1.5);
	backdrop-filter: blur(16px) saturate(1.5);
}

/* Desktop ------------------------------------------------------------ */

@media (min-width: 768px) {
	.iltoc--box.iltoc--cols-2 > .iltoc__list {
		columns: 2;
		column-gap: 36px;
	}

	.iltoc--box.iltoc--cols-2 .iltoc__item + .iltoc__item {
		margin-top: 0;
		padding-top: var(--iltoc-gap, 2px);
	}

	.iltoc--collapsible label.iltoc__title {
		cursor: pointer;
		pointer-events: auto;
	}

	.iltoc--collapsible .iltoc__chevron {
		display: block;
	}

	.iltoc--collapsible.iltoc--d-open .iltoc__check:checked ~ .iltoc__list,
	.iltoc--collapsible.iltoc--d-closed .iltoc__check:not(:checked) ~ .iltoc__list {
		display: none;
	}

	.iltoc--collapsible.iltoc--d-open .iltoc__check:checked + .iltoc__title,
	.iltoc--collapsible.iltoc--d-closed .iltoc__check:not(:checked) + .iltoc__title {
		margin-bottom: 0;
	}

	.iltoc--collapsible.iltoc--d-open .iltoc__check:checked + .iltoc__title .iltoc__chevron,
	.iltoc--collapsible.iltoc--d-closed .iltoc__check:not(:checked) + .iltoc__title .iltoc__chevron {
		transform: rotate(-45deg);
	}
}

/* Touch targets ------------------------------------------------------ */

@media (max-width: 767.98px), (pointer: coarse) {
	.iltoc .iltoc__link {
		align-items: center;
		min-height: 44px;
	}

	.iltoc label.iltoc__title {
		min-height: 44px;
	}
}

/* Mobile ------------------------------------------------------------- */

@media (max-width: 767.98px) {
	.iltoc--collapsible:not(.iltoc--float-m) label.iltoc__title {
		cursor: pointer;
		pointer-events: auto;
	}

	.iltoc--collapsible:not(.iltoc--float-m) .iltoc__chevron {
		display: block;
	}

	.iltoc--collapsible.iltoc--m-open:not(.iltoc--float-m) .iltoc__check:checked ~ .iltoc__list,
	.iltoc--collapsible.iltoc--m-closed:not(.iltoc--float-m) .iltoc__check:not(:checked) ~ .iltoc__list {
		display: none;
	}

	.iltoc--collapsible.iltoc--m-open:not(.iltoc--float-m) .iltoc__check:checked + .iltoc__title,
	.iltoc--collapsible.iltoc--m-closed:not(.iltoc--float-m) .iltoc__check:not(:checked) + .iltoc__title {
		margin-bottom: 0;
	}

	.iltoc--collapsible.iltoc--m-open:not(.iltoc--float-m) .iltoc__check:checked + .iltoc__title .iltoc__chevron,
	.iltoc--collapsible.iltoc--m-closed:not(.iltoc--float-m) .iltoc__check:not(:checked) + .iltoc__title .iltoc__chevron {
		transform: rotate(-45deg);
	}

	/* Floating button: a round button in the corner, the list opens as a sheet. */

	.iltoc-wrap--float-m {
		margin: 0;
	}

	.iltoc.iltoc--float-m {
		position: fixed;
		z-index: 9990;
		right: 16px;
		bottom: calc(16px + env(safe-area-inset-bottom, 0px));
		left: auto;
		width: auto;
		padding: 0;
		border: 0;
		border-radius: 0;
		background: none;
		box-shadow: none;
		-webkit-backdrop-filter: none;
		backdrop-filter: none;
	}

	.iltoc.iltoc--float-m.iltoc--left {
		right: auto;
		left: 16px;
	}

	.iltoc--float-m label.iltoc__title {
		justify-content: center;
		width: 56px;
		height: 56px;
		margin: 0;
		border-radius: 50%;
		background: var(--iltoc-accent, #4f46e5);
		box-shadow: 0 8px 24px rgba(0, 0, 0, 0.28);
		color: var(--iltoc-button-text, #fff);
		cursor: pointer;
		pointer-events: auto;
	}

	.iltoc--float-m .iltoc__title-text {
		position: absolute;
		width: 1px;
		height: 1px;
		margin: -1px;
		overflow: hidden;
		clip-path: inset(50%);
		white-space: nowrap;
	}

	.iltoc--float-m .iltoc__icon {
		display: block;
		width: 22px;
		height: 2px;
		border-radius: 2px;
		background: currentColor;
		box-shadow: 0 -7px 0 currentColor, 0 7px 0 currentColor;
	}

	.iltoc--float-m .iltoc__chevron {
		display: none;
	}

	.iltoc--float-m > .iltoc__list {
		display: none;
		position: fixed;
		right: 12px;
		bottom: calc(84px + env(safe-area-inset-bottom, 0px));
		left: 12px;
		max-height: min(70vh, 520px);
		padding: 12px 22px;
		overflow: auto;
		overscroll-behavior: contain;
		border: var(--iltoc-border-width, 1px) solid var(--iltoc-border, #ececf1);
		border-radius: var(--iltoc-radius, 16px);
		background: linear-gradient(var(--iltoc-bg, #f6f6f8), var(--iltoc-bg, #f6f6f8)), var(--iltoc-panel-bg, #fff);
		box-shadow: 0 16px 48px rgba(0, 0, 0, 0.28);
	}

	.iltoc--float-m .iltoc__check:checked ~ .iltoc__list {
		display: block;
	}
}

@media (prefers-reduced-motion: reduce) {
	.iltoc .iltoc__link,
	.iltoc .iltoc__chevron {
		transition: none;
	}
}

@media print {
	.iltoc.iltoc--float-m {
		display: none;
	}
}