/**
 * Phase 21 — Notes Hub
 * Uses IlmGhar tokens; hub + single scope.
 */

.ig-notes-hub {
	--nh-ink: var(--ig-color-text, #0f172a);
	--nh-muted: var(--ig-color-text-muted, #64748b);
	--nh-line: color-mix(in srgb, var(--ig-color-border, #e2e8f0) 88%, transparent);
	--nh-surface: var(--ig-color-bg, #ffffff);
	--nh-soft: var(--ig-color-bg-light, #f8fafc);
	--nh-accent: var(--ig-color-primary, #1d4ed8);
	--nh-radius: 1rem;
	--nh-ease: cubic-bezier(0.22, 1, 0.36, 1);
	overflow-x: clip;
	background: var(--nh-surface);
	color: var(--nh-ink);
}

.ig-notes-hub .ig-home-section {
	padding-block: clamp(3rem, 2.4rem + 2vw, 5rem);
}

.ig-notes-hub .ig-home-section--tint {
	background: var(--nh-soft);
}

.ig-notes-hub .ig-home-head {
	margin-bottom: clamp(1.5rem, 1.2rem + 1vw, 2.25rem);
	max-width: 40rem;
}

.ig-notes-hub .ig-home-head--center {
	margin-inline: auto;
	text-align: center;
}

/* Hero */
.ig-nh-hero {
	position: relative;
	isolation: isolate;
	padding: clamp(3rem, 2.4rem + 2.5vw, 5rem) 0 clamp(3.5rem, 2.8rem + 2vw, 5.5rem);
	background:
		linear-gradient(180deg, rgba(255, 255, 255, 0.05), transparent 42%),
		linear-gradient(150deg, #0c2a1f 0%, #134e3a 48%, #0f3d5c 100%);
	color: #fff;
	overflow: hidden;
}

.ig-nh-hero__bg {
	position: absolute;
	inset: 0;
	z-index: 0;
	pointer-events: none;
	background:
		radial-gradient(55% 45% at 88% 12%, rgba(52, 211, 153, 0.22), transparent 60%),
		radial-gradient(40% 35% at 8% 80%, rgba(56, 189, 248, 0.14), transparent 55%);
}

.ig-nh-hero .ig-container {
	position: relative;
	z-index: 1;
}

.ig-nh-hero__inner {
	max-width: 40rem;
}

.ig-nh-hero__eyebrow {
	margin: 0 0 0.65rem;
	font-size: 0.72rem;
	font-weight: 650;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	opacity: 0.85;
}

.ig-nh-hero__title {
	margin: 0 0 0.85rem;
	font-size: clamp(2rem, 1.55rem + 2vw, 3rem);
	font-weight: 750;
	letter-spacing: -0.03em;
	line-height: 1.12;
}

.ig-nh-hero__text {
	margin: 0;
	font-size: 1.05rem;
	line-height: 1.55;
	opacity: 0.92;
	max-width: 36rem;
}

.ig-nh-hero__crumbs {
	display: flex;
	flex-wrap: wrap;
	gap: 0.4rem;
	align-items: center;
	margin: 0 0 1.25rem;
	font-size: 0.88rem;
	opacity: 0.9;
}

.ig-nh-hero__crumbs a {
	color: inherit;
	text-decoration: underline;
	text-underline-offset: 0.15em;
}

.ig-nh-hero__crumbs a:hover {
	opacity: 1;
}

/* Filters */
.ig-nh-filters {
	max-width: 56rem;
	margin-inline: auto;
	padding: 1.25rem;
	border: 1px solid var(--nh-line);
	border-radius: var(--nh-radius);
	background: var(--nh-surface);
	box-shadow: var(--ig-shadow-sm, 0 1px 2px rgba(15, 23, 42, 0.06));
}

.ig-nh-filters__grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(11rem, 1fr));
	gap: 0.85rem;
}

.ig-nh-field {
	display: flex;
	flex-direction: column;
	gap: 0.35rem;
}

.ig-nh-field--grow {
	grid-column: 1 / -1;
}

.ig-nh-field__label {
	font-size: 0.78rem;
	font-weight: 600;
	color: var(--nh-muted);
}

.ig-nh-field select,
.ig-nh-field input {
	width: 100%;
	min-height: 2.6rem;
	padding: 0.45rem 0.7rem;
	border: 1px solid var(--nh-line);
	border-radius: 0.65rem;
	background: var(--nh-soft);
	color: var(--nh-ink);
	font: inherit;
}

.ig-nh-filters__actions {
	margin-top: 1rem;
	display: flex;
	justify-content: flex-end;
}

/* Cards / chips */
.ig-nh-card-grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(15.5rem, 1fr));
	gap: 1rem;
}

.ig-nh-card {
	display: flex;
	flex-direction: column;
	gap: 0.45rem;
	padding: 1.15rem 1.2rem 1.25rem;
	border: 1px solid var(--nh-line);
	border-radius: var(--nh-radius);
	background: var(--nh-surface);
	text-decoration: none;
	color: inherit;
	transition: transform 0.25s var(--nh-ease), border-color 0.25s var(--nh-ease), box-shadow 0.25s var(--nh-ease);
}

.ig-nh-card:hover {
	transform: translateY(-2px);
	border-color: color-mix(in srgb, var(--nh-accent) 35%, var(--nh-line));
	box-shadow: 0 10px 28px rgba(15, 23, 42, 0.08);
}

.ig-nh-card__mono {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 2.5rem;
	height: 2.5rem;
	border-radius: 0.75rem;
	background: color-mix(in srgb, var(--nh-accent) 12%, transparent);
	color: var(--nh-accent);
	font-weight: 750;
	font-size: 0.85rem;
}

.ig-nh-card__meta {
	font-size: 0.78rem;
	color: var(--nh-muted);
	font-weight: 600;
}

.ig-nh-card__title {
	margin: 0;
	font-size: 1.1rem;
	letter-spacing: -0.02em;
}

.ig-nh-card__text {
	margin: 0;
	font-size: 0.92rem;
	line-height: 1.45;
	color: var(--nh-muted);
}

.ig-nh-chip-grid {
	display: flex;
	flex-wrap: wrap;
	gap: 0.55rem;
}

.ig-nh-chip {
	display: inline-flex;
	align-items: center;
	padding: 0.45rem 0.85rem;
	border-radius: 999px;
	border: 1px solid var(--nh-line);
	background: var(--nh-surface);
	color: var(--nh-ink);
	text-decoration: none;
	font-size: 0.9rem;
	font-weight: 600;
	transition: background 0.2s var(--nh-ease), border-color 0.2s var(--nh-ease);
}

.ig-nh-chip:hover {
	border-color: color-mix(in srgb, var(--nh-accent) 40%, var(--nh-line));
	background: color-mix(in srgb, var(--nh-accent) 8%, var(--nh-surface));
}

.ig-nh-note-grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(16rem, 1fr));
	gap: 1rem;
}

.ig-nh-note-card {
	border: 1px solid var(--nh-line);
	border-radius: var(--nh-radius);
	background: var(--nh-surface);
	transition: border-color 0.2s var(--nh-ease), box-shadow 0.2s var(--nh-ease);
}

.ig-nh-note-card:hover {
	border-color: color-mix(in srgb, var(--nh-accent) 30%, var(--nh-line));
	box-shadow: 0 8px 24px rgba(15, 23, 42, 0.07);
}

.ig-nh-note-card__link {
	display: block;
	padding: 1.1rem 1.15rem 1.2rem;
	text-decoration: none;
	color: inherit;
}

.ig-nh-note-card__meta,
.ig-nh-note-card__chapter {
	margin: 0 0 0.35rem;
	font-size: 0.78rem;
	color: var(--nh-muted);
	font-weight: 600;
}

.ig-nh-note-card__title {
	margin: 0 0 0.4rem;
	font-size: 1.05rem;
	letter-spacing: -0.02em;
}

.ig-nh-note-card__excerpt {
	margin: 0;
	font-size: 0.9rem;
	line-height: 1.45;
	color: var(--nh-muted);
}

.ig-nh-empty {
	color: var(--nh-muted);
	margin: 0;
}

/* FAQ */
.ig-nh-faq {
	max-width: 42rem;
	margin-inline: auto;
	display: grid;
	gap: 0.65rem;
}

.ig-nh-faq__item {
	border: 1px solid var(--nh-line);
	border-radius: 0.85rem;
	background: var(--nh-surface);
	padding: 0.85rem 1rem;
}

.ig-nh-faq__q {
	cursor: pointer;
	font-weight: 650;
	list-style: none;
}

.ig-nh-faq__q::-webkit-details-marker {
	display: none;
}

.ig-nh-faq__a {
	margin-top: 0.55rem;
	color: var(--nh-muted);
	font-size: 0.95rem;
	line-height: 1.55;
}

.ig-nh-faq__a p {
	margin: 0;
}

/* Related modules */
.ig-nh-related-grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(14rem, 1fr));
	gap: 0.85rem;
}

.ig-nh-related {
	display: flex;
	flex-direction: column;
	gap: 0.3rem;
	padding: 1rem 1.05rem;
	border-radius: 0.85rem;
	border: 1px solid var(--nh-line);
	text-decoration: none;
	color: inherit;
	background: var(--nh-surface);
}

.ig-nh-related:hover {
	border-color: color-mix(in srgb, var(--nh-accent) 35%, var(--nh-line));
}

.ig-nh-related__label {
	font-size: 0.98rem;
}

.ig-nh-related__text {
	font-size: 0.85rem;
	color: var(--nh-muted);
}

.ig-nh-intro__card {
	max-width: 46rem;
	padding: 1.5rem 1.6rem;
	border-radius: var(--nh-radius);
	border: 1px solid var(--nh-line);
	background: var(--nh-soft);
}

.ig-nh-intro__title {
	margin: 0 0 0.65rem;
	font-size: 1.35rem;
	letter-spacing: -0.02em;
}

.ig-nh-intro__text,
.ig-nh-intro__note {
	margin: 0 0 0.75rem;
	color: var(--nh-muted);
	line-height: 1.55;
}

.ig-nh-intro__note {
	margin-bottom: 0;
	font-size: 0.92rem;
}

/* Single */
.ig-notes-hub--single {
	padding-bottom: 3rem;
}

.ig-nh-single-hero {
	padding: clamp(2.5rem, 2rem + 2vw, 4rem) 0 1.5rem;
	background: linear-gradient(180deg, var(--nh-soft), var(--nh-surface));
}

.ig-nh-single-hero .ig-nh-hero__crumbs {
	opacity: 1;
	color: var(--nh-muted);
}

.ig-nh-single-hero .ig-nh-hero__crumbs a {
	color: var(--nh-accent);
}

.ig-nh-single-hero__title {
	margin: 0.35rem 0 0.65rem;
	font-size: clamp(1.75rem, 1.4rem + 1.5vw, 2.5rem);
	letter-spacing: -0.03em;
	line-height: 1.15;
}

.ig-nh-single-hero__text {
	margin: 0;
	max-width: 40rem;
	color: var(--nh-muted);
	line-height: 1.55;
}

.ig-nh-toolbar {
	position: sticky;
	top: 0;
	z-index: 20;
	border-block: 1px solid var(--nh-line);
	background: color-mix(in srgb, var(--nh-surface) 92%, transparent);
	backdrop-filter: blur(8px);
}

.ig-nh-toolbar__inner {
	display: flex;
	flex-wrap: wrap;
	gap: 0.55rem;
	padding-block: 0.75rem;
}

.ig-nh-meta-grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(10rem, 1fr));
	gap: 0.85rem 1.25rem;
	margin: 0;
}

.ig-nh-meta-grid dt {
	font-size: 0.75rem;
	text-transform: uppercase;
	letter-spacing: 0.05em;
	color: var(--nh-muted);
	font-weight: 650;
}

.ig-nh-meta-grid dd {
	margin: 0.2rem 0 0;
	font-weight: 600;
}

.ig-nh-single-meta,
.ig-nh-chapters,
.ig-nh-reading,
.ig-nh-single-related,
.ig-nh-faq--single,
.ig-nh-report {
	padding-block: 1.75rem;
}

.ig-nh-section-title {
	margin: 0 0 1rem;
	font-size: 1.25rem;
	letter-spacing: -0.02em;
}

.ig-nh-chapters__list {
	list-style: none;
	margin: 0;
	padding: 0;
	display: grid;
	gap: 0.45rem;
}

.ig-nh-chapters__list li {
	display: flex;
	justify-content: space-between;
	gap: 1rem;
	padding: 0.7rem 0.9rem;
	border: 1px solid var(--nh-line);
	border-radius: 0.7rem;
	background: var(--nh-surface);
}

.ig-nh-chapters__list li.is-current {
	border-color: color-mix(in srgb, var(--nh-accent) 35%, var(--nh-line));
	background: color-mix(in srgb, var(--nh-accent) 6%, var(--nh-surface));
}

.ig-nh-chapters__list a {
	color: inherit;
	text-decoration: none;
	font-weight: 600;
}

.ig-nh-chapters__list em {
	font-style: normal;
	font-size: 0.78rem;
	color: var(--nh-accent);
	font-weight: 650;
}

.ig-nh-reading__body,
.ig-nh-reading__preview {
	max-width: 46rem;
	line-height: 1.7;
}

.ig-nh-related-block {
	margin-bottom: 1.75rem;
}

.ig-nh-related-list {
	margin: 0;
	padding-left: 1.1rem;
	display: grid;
	gap: 0.35rem;
}

.ig-nh-refs {
	margin-top: 1.5rem;
	padding-top: 1.25rem;
	border-top: 1px solid var(--nh-line);
}

.ig-nh-refs__title {
	margin: 0 0 0.5rem;
	font-size: 1.05rem;
}

.ig-nh-report__inner {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	justify-content: space-between;
	gap: 1rem;
	padding: 1.1rem 1.25rem;
	border-radius: var(--nh-radius);
	border: 1px dashed var(--nh-line);
	background: var(--nh-soft);
}

.ig-nh-report__inner p {
	margin: 0;
	font-weight: 600;
}

/* Buttons fallback if component styles differ */
.ig-notes-hub .ig-btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	min-height: 2.5rem;
	padding: 0.45rem 1rem;
	border-radius: 0.65rem;
	font-weight: 650;
	font-size: 0.92rem;
	text-decoration: none;
	border: 1px solid transparent;
	cursor: pointer;
}

.ig-notes-hub .ig-btn--primary {
	background: var(--nh-accent);
	color: #fff;
}

	.ig-notes-hub .ig-btn--ghost,
	.ig-notes-hub .ig-btn--outline {
		background: transparent;
		border-color: var(--nh-line);
		color: var(--nh-ink);
	}

/* Dark mode */
html[data-theme="dark"] .ig-notes-hub,
.ig-theme-dark .ig-notes-hub {
	--nh-surface: var(--ig-color-bg, #0b1220);
	--nh-soft: var(--ig-color-bg-light, #111827);
	--nh-ink: var(--ig-color-text, #e5e7eb);
	--nh-muted: var(--ig-color-text-muted, #94a3b8);
	--nh-line: color-mix(in srgb, var(--ig-color-border, #334155) 90%, transparent);
}

@media print {
	.ig-nh-toolbar,
	.ig-nh-report,
	.ig-nh-single-related,
	.ig-site-header,
	.ig-site-footer,
	.site-header,
	.site-footer {
		display: none !important;
	}

	.ig-nh-print-area {
		color: #000;
	}
}

@media (max-width: 640px) {
	.ig-nh-filters__actions {
		justify-content: stretch;
	}

	.ig-nh-filters__actions .ig-btn {
		width: 100%;
	}
}