/**
 * Persian Table of Contents — Premium front-end UI
 * RTL-first · Logical properties · Fully themeable via CSS variables
 */

.ptoc {
	/* Fallback defaults (overridden by inline CSS vars from settings) */
	--ptoc-bg: #ffffff;
	--ptoc-link: #1f1f1f;
	--ptoc-hover: #0f766e;
	--ptoc-radius: 10px;
	--ptoc-border: #e8e8e8;
	--ptoc-border-w: 1px;
	--ptoc-shadow-blur: 14px;
	--ptoc-shadow-alpha: 0.06;
	--ptoc-toggle-bg: #ffffff;
	--ptoc-toggle-hover-bg: #f5f5f5;
	--ptoc-panel-bg: #ffffff;
	--ptoc-link-font-size: 14px;
	--ptoc-link-line-height: 1.65;
	--ptoc-link-padding-y: 7px;
	--ptoc-link-padding-x: 10px;
	--ptoc-active-bg: #f3faf8;
	--ptoc-marker-size: 7px;
	--ptoc-indent: 14px;
	--ptoc-badge-bg: #0f766e;
	--ptoc-badge-text: #ffffff;
	--ptoc-anim: 240ms;
	--ptoc-title-size: 15px;
	--ptoc-muted: color-mix(in srgb, var(--ptoc-link) 52%, transparent);
	--ptoc-pad: 0.65rem 0.85rem;
	--ptoc-ease: cubic-bezier(0.22, 1, 0.36, 1);
	--ptoc-gap: 0.2rem;

	direction: rtl;
	box-sizing: border-box;
	display: block;
	width: 100%;
	max-width: 100%;
	margin-block: 0 1.35rem;
	margin-inline: 0;
	padding: 0;
	position: relative;
	isolation: isolate;
	overflow: hidden;

	background: var(--ptoc-bg);
	border: var(--ptoc-border-w) solid var(--ptoc-border);
	border-radius: var(--ptoc-radius);
	/* Neutral black shadow — no blue/slate cast */
	box-shadow:
		0 1px 0 rgba(0, 0, 0, 0.03),
		0 6px var(--ptoc-shadow-blur) rgba(0, 0, 0, var(--ptoc-shadow-alpha));

	font-family: inherit;
	font-size: 0.9rem;
	line-height: 1.6;
	color: var(--ptoc-link);
	-webkit-font-smoothing: antialiased;
}

/* Thin accent rail (RTL-aware) */
.ptoc::after {
	content: "";
	position: absolute;
	inset-block: 0;
	inset-inline-start: 0;
	inline-size: 3px;
	background: var(--ptoc-hover);
	z-index: 2;
	pointer-events: none;
}

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

/* ── Header / Toggle ───────────────────────────────────────── */

.ptoc__toggle {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 0.55rem;
	width: 100%;
	margin: 0;
	padding: var(--ptoc-pad);
	padding-inline-start: calc(0.85rem + 3px);
	border: 0 !important;
	border-block-end: 1px solid transparent !important;
	border-radius: 0 !important;
	/* Defeat theme `button` styles (often blue primary) */
	background: var(--ptoc-toggle-bg) !important;
	background-image: none !important;
	background-color: var(--ptoc-toggle-bg) !important;
	color: var(--ptoc-link) !important;
	box-shadow: none !important;
	text-shadow: none !important;
	font: inherit;
	font-weight: 700;
	font-size: 0.95em;
	line-height: 1.4;
	text-align: start;
	text-transform: none !important;
	letter-spacing: normal !important;
	cursor: pointer;
	appearance: none;
	-webkit-appearance: none;
	transition:
		background-color var(--ptoc-anim) var(--ptoc-ease),
		border-color var(--ptoc-anim) var(--ptoc-ease);
}

.ptoc.is-open .ptoc__toggle {
	border-block-end-color: var(--ptoc-border) !important;
}

.ptoc__toggle:hover,
.ptoc__toggle:focus,
.ptoc__toggle:active {
	background: var(--ptoc-toggle-hover-bg) !important;
	background-image: none !important;
	background-color: var(--ptoc-toggle-hover-bg) !important;
	color: var(--ptoc-link) !important;
	box-shadow: none !important;
}

.ptoc__toggle:focus {
	outline: none;
}

.ptoc__toggle:focus-visible {
	outline: 2px solid var(--ptoc-hover);
	outline-offset: -2px;
}

.ptoc__toggle-meta {
	display: flex;
	align-items: center;
	gap: 0.55rem;
	min-width: 0;
	flex: 1;
}

.ptoc__toggle-icon-box {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	flex-shrink: 0;
	inline-size: 1.7rem;
	block-size: 1.7rem;
	border-radius: 7px;
	background: color-mix(in srgb, var(--ptoc-hover) 10%, transparent);
	color: var(--ptoc-hover);
}

.ptoc__toggle-icon-box svg {
	display: block;
	width: 14px;
	height: 14px;
}

.ptoc__toggle-copy {
	display: flex;
	flex-direction: row;
	flex-wrap: wrap;
	align-items: baseline;
	gap: 0.35rem 0.55rem;
	min-width: 0;
}

.ptoc__toggle-label {
	display: block;
	font-weight: 700;
	letter-spacing: 0;
	line-height: 1.3;
	color: var(--ptoc-link);
	font-size: var(--ptoc-title-size);
}

.ptoc__toggle-sub {
	display: inline;
	font-size: calc(var(--ptoc-title-size) * 0.78);
	font-weight: 500;
	color: var(--ptoc-muted);
	line-height: 1.3;
}

/* Kept for backward compatibility if markup still includes it */
.ptoc__toggle-count {
	display: none;
}

.ptoc__toggle-chevron {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	flex-shrink: 0;
	inline-size: 1.55rem;
	block-size: 1.55rem;
	border-radius: 999px;
	background: transparent;
	color: var(--ptoc-muted);
	transition:
		transform var(--ptoc-anim) var(--ptoc-ease),
		color var(--ptoc-anim) var(--ptoc-ease);
}

.ptoc__toggle-chevron svg {
	width: 15px;
	height: 15px;
}

.ptoc.is-open .ptoc__toggle-chevron {
	transform: rotate(180deg);
	background: transparent;
	color: var(--ptoc-hover);
}

/* Title alignment */
.ptoc--align-center .ptoc__toggle {
	justify-content: center;
	position: relative;
}

.ptoc--align-center .ptoc__toggle-meta {
	flex: 1;
	justify-content: center;
	text-align: center;
}

.ptoc--align-center .ptoc__toggle-copy {
	align-items: center;
	justify-content: center;
	text-align: center;
}

.ptoc--align-center .ptoc__toggle-icon-box {
	position: absolute;
	inset-inline-start: calc(0.75rem + 3px);
}

.ptoc--align-center .ptoc__toggle-chevron {
	position: absolute;
	inset-inline-end: 0.65rem;
}

.ptoc--align-end .ptoc__toggle-meta {
	justify-content: flex-end;
	text-align: end;
}

.ptoc--align-end .ptoc__toggle-copy {
	align-items: flex-end;
	text-align: end;
}

.ptoc--align-start .ptoc__toggle-meta {
	justify-content: flex-start;
	text-align: start;
}

/* ── Panel ─────────────────────────────────────────────────── */

.ptoc__panel {
	max-height: 0;
	opacity: 0;
	overflow: hidden;
	pointer-events: none;
	transform: translateY(-4px);
	background: var(--ptoc-panel-bg);
	padding-block: 0;
	padding-inline: 0.75rem 0.75rem;
	padding-inline-start: calc(0.75rem + 3px);

	transition:
		max-height var(--ptoc-anim) var(--ptoc-ease),
		opacity var(--ptoc-anim) var(--ptoc-ease),
		transform var(--ptoc-anim) var(--ptoc-ease),
		padding-block var(--ptoc-anim) var(--ptoc-ease);
}

.ptoc.is-open .ptoc__panel {
	max-height: var(--ptoc-panel-h, 1200px);
	opacity: 1;
	pointer-events: auto;
	transform: translateY(0);
	padding-block: 0.55rem 0.7rem;
}

/* ── Lists ─────────────────────────────────────────────────── */

.ptoc__list {
	margin: 0;
	padding: 0;
	list-style: none;
	display: flex;
	flex-direction: column;
	gap: var(--ptoc-gap);
}

.ptoc__list--nested {
	margin-block-start: 0.35rem;
	margin-block-end: 0.15rem;
	padding-inline-start: var(--ptoc-indent);
	position: relative;
	gap: calc(var(--ptoc-gap) * 0.85);
}

/* Timeline rail for nested levels */
.ptoc__list--nested::before {
	content: "";
	position: absolute;
	inset-block: 0.35rem 0.35rem;
	inset-inline-start: calc(var(--ptoc-indent) * 0.35);
	inline-size: 2px;
	border-radius: 999px;
	background: color-mix(in srgb, var(--ptoc-hover) 22%, var(--ptoc-border));
	pointer-events: none;
}

.ptoc__item {
	margin: 0;
	padding: 0;
}

.ptoc__item--h2 > .ptoc__link {
	font-weight: 700;
}

.ptoc__item--h3 > .ptoc__link,
.ptoc__item--h4 > .ptoc__link {
	font-weight: 500;
}

.ptoc__item--h3 > .ptoc__link {
	font-size: calc(var(--ptoc-link-font-size) * 0.97);
}

.ptoc__item--h4 > .ptoc__link {
	font-size: calc(var(--ptoc-link-font-size) * 0.94);
	opacity: 0.92;
}

/* ── Links (SEO: real <a href="#id">) ──────────────────────── */

.ptoc__link {
	display: flex;
	align-items: flex-start;
	gap: 0.65rem;
	position: relative;

	font-size: var(--ptoc-link-font-size);
	line-height: var(--ptoc-link-line-height);

	padding-inline: var(--ptoc-link-padding-x);
	padding-block: var(--ptoc-link-padding-y);

	color: var(--ptoc-link);
	text-decoration: none;
	border-radius: calc(var(--ptoc-radius) * 0.55);
	border: 1px solid transparent;
	background: transparent;

	transition:
		color var(--ptoc-anim) var(--ptoc-ease),
		background-color var(--ptoc-anim) var(--ptoc-ease),
		border-color var(--ptoc-anim) var(--ptoc-ease),
		box-shadow var(--ptoc-anim) var(--ptoc-ease),
		padding-inline-start var(--ptoc-anim) var(--ptoc-ease);

	word-break: break-word;
}

/* Default marker: filled ring */
.ptoc__link::before {
	content: "";
	flex-shrink: 0;
	inline-size: var(--ptoc-marker-size);
	block-size: var(--ptoc-marker-size);
	margin-block-start: calc(var(--ptoc-link-line-height) * 0.35em);
	border-radius: 999px;
	background: var(--ptoc-hover);
	box-shadow: 0 0 0 3px color-mix(in srgb, var(--ptoc-hover) 18%, transparent);
	transition:
		background-color var(--ptoc-anim) var(--ptoc-ease),
		box-shadow var(--ptoc-anim) var(--ptoc-ease),
		transform var(--ptoc-anim) var(--ptoc-ease);
}

.ptoc__item--h3 > .ptoc__link::before {
	background: color-mix(in srgb, var(--ptoc-hover) 70%, #fff);
	box-shadow: 0 0 0 3px color-mix(in srgb, var(--ptoc-hover) 12%, transparent);
}

.ptoc__item--h4 > .ptoc__link::before {
	background: transparent;
	border: 2px solid color-mix(in srgb, var(--ptoc-hover) 55%, var(--ptoc-link));
	box-shadow: none;
	inline-size: calc(var(--ptoc-marker-size) - 1px);
	block-size: calc(var(--ptoc-marker-size) - 1px);
}

/* Marker: line */
.ptoc--marker-line .ptoc__link::before {
	inline-size: 3px;
	block-size: calc(var(--ptoc-marker-size) * 1.6);
	border-radius: 999px;
	border: 0;
	box-shadow: none;
	background: var(--ptoc-hover);
	margin-block-start: calc(var(--ptoc-link-line-height) * 0.28em);
}

.ptoc--marker-line .ptoc__item--h3 > .ptoc__link::before,
.ptoc--marker-line .ptoc__item--h4 > .ptoc__link::before {
	background: color-mix(in srgb, var(--ptoc-hover) 55%, var(--ptoc-link));
	border: 0;
}

/* Marker: none */
.ptoc--marker-none .ptoc__link::before {
	content: none;
	margin: 0;
	inline-size: 0;
	block-size: 0;
	box-shadow: none;
	border: 0;
}

.ptoc--marker-none .ptoc__link {
	gap: 0.4rem;
}

.ptoc__text {
	flex: 1;
	min-width: 0;
}

.ptoc__badge {
	flex-shrink: 0;
	align-self: center;
	background: var(--ptoc-badge-bg);
	color: var(--ptoc-badge-text);
	font-size: 0.68em;
	font-weight: 800;
	line-height: 1;
	letter-spacing: 0.02em;
	padding-block: 0.28em;
	padding-inline: 0.55em;
	border-radius: 999px;
}

.ptoc__link:hover,
.ptoc__link:focus-visible {
	color: var(--ptoc-hover);
	background: color-mix(in srgb, var(--ptoc-hover) 8%, transparent);
	border-color: color-mix(in srgb, var(--ptoc-hover) 22%, transparent);
	padding-inline-start: calc(var(--ptoc-link-padding-x) + 2px);
}

.ptoc__link:hover::before,
.ptoc__link:focus-visible::before {
	transform: scale(1.15);
}

.ptoc__link.is-active {
	color: var(--ptoc-hover);
	font-weight: 700;
	background: var(--ptoc-active-bg);
	border-color: color-mix(in srgb, var(--ptoc-hover) 28%, transparent);
	box-shadow: inset 3px 0 0 var(--ptoc-hover);
}

.ptoc__link.is-active::before {
	background: var(--ptoc-hover);
	box-shadow: 0 0 0 4px color-mix(in srgb, var(--ptoc-hover) 22%, transparent);
	transform: scale(1.1);
}

.ptoc__link:focus {
	outline: none;
}

.ptoc__link:focus-visible {
	outline: 2px solid var(--ptoc-hover);
	outline-offset: 2px;
}

/* Numbers mode (visual only; keeps <ol>) */
.ptoc--numbers .ptoc__list {
	list-style: persian;
	padding-inline-start: 1.55rem;
	gap: 0.2rem;
}

.ptoc--numbers .ptoc__list--nested::before {
	display: none;
}

.ptoc--numbers .ptoc__link::before {
	content: none;
	margin: 0;
	inline-size: 0;
	block-size: 0;
	box-shadow: none;
	border: 0;
}

.ptoc--numbers .ptoc__link {
	display: inline;
	padding-inline: 0.2rem;
	border: 0;
	box-shadow: none;
}

.ptoc--numbers .ptoc__link:hover,
.ptoc--numbers .ptoc__link.is-active {
	background: transparent;
	padding-inline-start: 0.2rem;
	text-decoration: underline;
	text-underline-offset: 0.2em;
}

:target {
	scroll-margin-block-start: 5.5rem;
}

/* ── Mobile ────────────────────────────────────────────────── */

@media (max-width: 600px) {
	.ptoc {
		--ptoc-pad: 0.55rem 0.7rem;
		margin-block-end: 1.15rem;
	}

	.ptoc__toggle {
		padding-inline-start: calc(0.7rem + 3px);
		gap: 0.45rem;
	}

	.ptoc__toggle-icon-box {
		inline-size: 1.55rem;
		block-size: 1.55rem;
		border-radius: 6px;
	}

	.ptoc__panel {
		padding-inline: 0.6rem;
		padding-inline-start: calc(0.6rem + 3px);
	}

	.ptoc.is-open .ptoc__panel {
		padding-block: 0.45rem 0.6rem;
	}
}

@media (prefers-reduced-motion: reduce) {
	.ptoc__toggle,
	.ptoc__toggle-chevron,
	.ptoc__panel,
	.ptoc__link,
	.ptoc__link::before {
		transition: none !important;
	}
}