/**
 * Nikolas X — Single post interactive UX (TOC, TTS, back-to-top).
 */

/* —— Layout with optional TOC —— */
.nx-single-layout {
	display: block;
}

.nx-single-layout__main {
	min-width: 0;
}

.nx-container--post {
	width: min(100% - (var(--nx-gutter) * 2), var(--nx-container-narrow));
}

@media (min-width: 1100px) {
	.nx-container--post:has(.nx-single-layout--has-toc) {
		width: min(100% - (var(--nx-gutter) * 2), 64rem);
	}

	.nx-single-layout--has-toc {
		display: grid;
		grid-template-columns: 13.5rem minmax(0, 1fr);
		gap: var(--nx-space-7);
		align-items: start;
	}
}

/* —— TOC —— */
.nx-post-toc {
	position: relative;
	margin: 0 0 var(--nx-space-5);
	padding: var(--nx-space-4);
	border: var(--nx-border-width) solid var(--nx-color-border);
	border-radius: var(--nx-radius);
	background: var(--nx-color-light);
}

.nx-post-toc[hidden] {
	display: none !important;
}

.nx-post-toc__title {
	margin: 0 0 var(--nx-space-3);
	font-size: var(--nx-fs-meta);
	font-weight: var(--nx-fw-semibold);
	letter-spacing: var(--nx-tracking-wide);
	text-transform: uppercase;
	color: var(--nx-color-muted);
}

.nx-post-toc__list {
	list-style: none;
	margin: 0;
	padding: 0;
	display: flex;
	flex-direction: column;
	gap: var(--nx-space-1);
}

.nx-post-toc__link {
	display: block;
	padding: var(--nx-space-2) var(--nx-space-3);
	border-radius: var(--nx-radius-sm);
	border-left: 2px solid transparent;
	color: var(--nx-color-text);
	font-size: var(--nx-fs-small);
	line-height: var(--nx-lh-snug);
	text-decoration: none;
	transition:
		background-color var(--nx-duration-fast) var(--nx-ease),
		color var(--nx-duration-fast) var(--nx-ease),
		border-color var(--nx-duration-fast) var(--nx-ease);
}

.nx-post-toc__link:hover {
	background: rgba(79, 70, 255, 0.08);
	color: var(--nx-color-primary);
	text-decoration: none;
}

.nx-post-toc__link.is-active,
.nx-post-toc__link[aria-current='true'] {
	background: rgba(79, 70, 255, 0.1);
	border-left-color: var(--nx-color-primary);
	color: var(--nx-color-primary);
	font-weight: var(--nx-fw-semibold);
}

@media (min-width: 1100px) {
	.nx-single-layout--has-toc .nx-post-toc {
		position: sticky;
		top: calc(var(--nx-space-6) + 3.5rem);
		margin-bottom: 0;
		max-height: calc(100vh - 6rem);
		overflow: auto;
	}
}

/* Desktop: hide mobile jump toggle */
.nx-post-toc__toggle {
	display: none;
}

@media (min-width: 1100px) {
	.nx-post-toc__panel[hidden] {
		display: block !important;
	}

	.nx-post-toc__panel {
		display: block;
	}
}

/* Mobile / tablet: sticky “Jump to section” dropdown (no sideways scroll) */
@media (max-width: 1099.98px) {
	.nx-post-toc {
		position: sticky;
		top: 4.5rem;
		z-index: calc(var(--nx-z-sticky) - 20);
		margin-inline: 0;
		padding: 0;
		border: 0;
		background: transparent;
	}

	.admin-bar .nx-post-toc {
		top: calc(4.5rem + 32px);
	}

	.nx-post-toc__title--desktop {
		position: absolute;
		width: 1px;
		height: 1px;
		padding: 0;
		margin: -1px;
		overflow: hidden;
		clip: rect(0, 0, 0, 0);
		white-space: nowrap;
		border: 0;
	}

	.nx-post-toc__toggle {
		display: flex;
		align-items: center;
		gap: var(--nx-space-2);
		width: 100%;
		min-height: 2.75rem;
		padding: var(--nx-space-3) var(--nx-space-4);
		border: var(--nx-border-width) solid var(--nx-color-border);
		border-radius: var(--nx-radius);
		background: var(--nx-color-white);
		box-shadow: var(--nx-shadow-sm, 0 1px 2px rgba(0, 0, 0, 0.06));
		font-family: inherit;
		font-size: var(--nx-fs-small);
		font-weight: var(--nx-fw-semibold);
		color: var(--nx-color-text);
		text-align: left;
		cursor: pointer;
		-webkit-tap-highlight-color: transparent;
	}

	.nx-post-toc__toggle:focus-visible {
		outline: 2px solid var(--nx-color-focus);
		outline-offset: 2px;
	}

	.nx-post-toc__toggle-label {
		flex: 0 0 auto;
		color: var(--nx-color-muted);
		font-weight: var(--nx-fw-medium);
		font-size: var(--nx-fs-meta);
		text-transform: uppercase;
		letter-spacing: var(--nx-tracking-wide);
	}

	.nx-post-toc__toggle-current {
		flex: 1 1 auto;
		min-width: 0;
		overflow: hidden;
		text-overflow: ellipsis;
		white-space: nowrap;
		color: var(--nx-color-primary);
	}

	.nx-post-toc__chevron {
		flex: 0 0 auto;
		width: 0.65rem;
		height: 0.65rem;
		border-right: 2px solid currentColor;
		border-bottom: 2px solid currentColor;
		transform: rotate(45deg);
		margin-top: -0.2rem;
		transition: transform var(--nx-duration-fast) var(--nx-ease);
	}

	.nx-post-toc.is-open .nx-post-toc__chevron {
		transform: rotate(-135deg);
		margin-top: 0.2rem;
	}

	.nx-post-toc__panel {
		position: absolute;
		left: 0;
		right: 0;
		top: calc(100% + var(--nx-space-2));
		max-height: min(70vh, 22rem);
		overflow: auto;
		padding: var(--nx-space-2);
		border: var(--nx-border-width) solid var(--nx-color-border);
		border-radius: var(--nx-radius);
		background: var(--nx-color-white);
		box-shadow: var(--nx-shadow-md);
		-webkit-overflow-scrolling: touch;
	}

	.nx-post-toc__panel[hidden] {
		display: none !important;
	}

	.nx-post-toc__list {
		flex-direction: column;
		gap: 0;
	}

	.nx-post-toc__link {
		padding: var(--nx-space-3) var(--nx-space-4);
		border-left: 0;
		border-radius: var(--nx-radius-sm);
		font-size: 0.9375rem;
		line-height: 1.35;
		white-space: normal;
	}

	.nx-post-toc__link.is-active,
	.nx-post-toc__link[aria-current='true'] {
		border-left: 0;
		background: rgba(79, 70, 255, 0.1);
	}
}

@media screen and (max-width: 782px) {
	.admin-bar .nx-post-toc {
		top: calc(4.5rem + 46px);
	}
}

.nx-entry__section-heading {
	scroll-margin-top: 5.5rem;
}

@media (min-width: 1100px) {
	.nx-entry__section-heading {
		scroll-margin-top: 6rem;
	}
}

/* —— TTS controls —— */
.nx-entry__standfirst-row {
	display: flex;
	flex-direction: column;
	gap: var(--nx-space-3);
}

.nx-tts {
	display: inline-flex;
	align-items: center;
	gap: var(--nx-space-2);
	flex-wrap: wrap;
}

.nx-tts[hidden] {
	display: none !important;
}

.nx-tts__label {
	font-size: var(--nx-fs-meta);
	font-weight: var(--nx-fw-medium);
	color: var(--nx-color-muted);
	margin-right: var(--nx-space-1);
}

.nx-tts .nx-button,
.nx-tts .nx-btn {
	min-height: var(--nx-control-h-sm);
	padding-inline: var(--nx-space-3);
	font-size: var(--nx-fs-meta);
}

.nx-tts .nx-button:disabled,
.nx-tts .nx-btn:disabled {
	opacity: 0.45;
	cursor: not-allowed;
	transform: none;
}

.nx-tts.is-speaking .nx-tts__label {
	color: var(--nx-color-primary);
}

/* —— Back to top —— */
.nx-back-to-top {
	position: fixed;
	right: var(--nx-space-5);
	bottom: var(--nx-space-5);
	z-index: var(--nx-z-overlay);
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: var(--nx-space-2);
	min-width: 2.75rem;
	min-height: 2.75rem;
	padding: 0 var(--nx-space-4);
	border: var(--nx-border-width) solid var(--nx-color-border);
	border-radius: var(--nx-radius);
	background: var(--nx-color-white);
	color: var(--nx-color-text);
	box-shadow: var(--nx-shadow-md);
	font-family: inherit;
	font-size: var(--nx-fs-small);
	font-weight: var(--nx-fw-semibold);
	cursor: pointer;
	opacity: 0;
	pointer-events: none;
	transform: translateY(0.5rem);
	transition:
		opacity var(--nx-duration) var(--nx-ease),
		transform var(--nx-duration) var(--nx-ease),
		background-color var(--nx-duration-fast) var(--nx-ease),
		color var(--nx-duration-fast) var(--nx-ease),
		border-color var(--nx-duration-fast) var(--nx-ease);
}

.nx-back-to-top[hidden] {
	display: none !important;
}

.nx-back-to-top.is-visible {
	opacity: 1;
	pointer-events: auto;
	transform: translateY(0);
}

.nx-back-to-top:hover {
	background: var(--nx-color-primary);
	border-color: var(--nx-color-primary);
	color: var(--nx-color-white);
}

.nx-back-to-top:focus-visible {
	outline: 2px solid var(--nx-color-focus);
	outline-offset: 2px;
}

.nx-back-to-top__icon {
	display: block;
	width: 1rem;
	height: 1rem;
}

@media (max-width: 479.98px) {
	.nx-back-to-top {
		right: var(--nx-space-4);
		bottom: var(--nx-space-4);
		padding-inline: var(--nx-space-3);
	}

	.nx-back-to-top__text {
		position: absolute;
		width: 1px;
		height: 1px;
		padding: 0;
		margin: -1px;
		overflow: hidden;
		clip: rect(0, 0, 0, 0);
		white-space: nowrap;
		border: 0;
	}
}