/**
 * Age of Dinosaurs — Learn Hub Stylesheet
 *
 * Implements museum field-journal aesthetic for the educational knowledge hub:
 * - Natural-history color palette (Bone, Sand, Chalk, Fern, Deep Fern, Espresso)
 * - Strict typography stack (Fraunces, Nunito Sans, DM Mono)
 * - Zero forbidden colors (no black, dark navy, dark blue, or crimson)
 * - 100% responsive without horizontal scroll on 320px–1920px viewports
 * - WCAG 2.2 AA accessibility and prefers-reduced-motion support
 *
 * @package AgeOfDinosaurs
 */

/* -------------------------------------------------------------------------
 * 1. Base Learn Hub & Breadcrumbs
 * ------------------------------------------------------------------------- */
.learn-hub-experience {
	background-color: var(--color-bone);
	color: var(--color-espresso);
	min-height: 100vh;
	padding-bottom: var(--space-4xl);
}

.learn-breadcrumbs {
	padding: calc(var(--nav-height, 66px) + var(--nav-top-offset, 14px) + 0.75rem) 0 var(--space-xs);
	background-color: var(--color-chalk);
	border-bottom: 1px solid var(--color-border-default);
}

/* -------------------------------------------------------------------------
 * 2. Hero Section
 * ------------------------------------------------------------------------- */
.learn-hero {
	padding-top: var(--space-xl);
	padding-bottom: var(--space-3xl);
}

.learn-hero__layout {
	display: grid;
	grid-template-columns: 1fr;
	gap: var(--space-2xl);
	align-items: center;
}

@media (min-width: 992px) {
	.learn-hero__layout {
		grid-template-columns: 1.15fr 0.85fr;
		gap: var(--space-3xl);
	}
}

.learn-hero__eyebrow {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: var(--space-xs);
	margin-bottom: var(--space-md);
}

.learn-hero__meta-sep {
	color: var(--color-dune);
}

.learn-hero__subtitle {
	font-family: var(--font-family-data);
	font-size: var(--font-size-xs);
	font-weight: 600;
	text-transform: uppercase;
	letter-spacing: 0.08em;
	color: var(--color-stone);
}

.learn-hero__title {
	font-family: var(--font-family-display);
	font-size: clamp(2.25rem, 1.8rem + 2.5vw, 3.5rem);
	font-weight: 800;
	line-height: 1.15;
	color: var(--color-espresso);
	margin: 0 0 var(--space-md) 0;
	letter-spacing: -0.02em;
}

.learn-hero__deck {
	font-size: clamp(1rem, 0.95rem + 0.35vw, 1.18rem);
	line-height: 1.65;
	color: var(--color-stone);
	margin: 0 0 var(--space-xl) 0;
	max-width: 62ch;
}

.learn-hero__actions {
	display: flex;
	flex-wrap: wrap;
	gap: var(--space-md);
	margin-bottom: var(--space-2xl);
}

.learn-hero__actions .btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: var(--space-xs);
	min-height: 48px;
}

/* Hero Metrics Bar */
.learn-metrics-bar {
	display: flex;
	flex-wrap: wrap;
	gap: var(--space-md);
	padding-top: var(--space-md);
	border-top: 1px solid var(--color-dune);
}

.learn-metric-pill {
	display: flex;
	flex-direction: column;
	gap: 2px;
}

.learn-metric-pill__num {
	font-family: var(--font-family-display);
	font-size: 1.5rem;
	font-weight: 700;
	color: var(--color-fern);
	line-height: 1;
}

.learn-metric-pill__txt {
	font-family: var(--font-family-data);
	font-size: var(--font-size-xs);
	color: var(--color-stone);
	text-transform: uppercase;
	letter-spacing: 0.05em;
}

/* Hero Media Card */
.learn-hero__media-card {
	padding: var(--space-md);
	border: 1px solid var(--color-dune);
	border-radius: var(--radius-xl);
	background: var(--color-sand);
}

.learn-hero__media-frame {
	position: relative;
	border-radius: var(--radius-lg);
	overflow: hidden;
	aspect-ratio: 1376 / 768;
	background-color: var(--color-chalk);
}

.learn-hero__img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	display: block;
}

.learn-hero__media-badge {
	position: absolute;
	bottom: var(--space-xs);
	left: var(--space-xs);
	right: var(--space-xs);
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	justify-content: space-between;
	gap: var(--space-2xs);
	padding: var(--space-2xs) var(--space-xs);
	background: rgba(46, 42, 34, 0.85);
	backdrop-filter: blur(8px);
	border-radius: var(--radius-md);
}

.learn-hero__media-caption {
	font-family: var(--font-family-data);
	font-size: 0.72rem;
	color: var(--color-bone);
}

.learn-hero__media-body {
	padding: var(--space-md) var(--space-xs) var(--space-xs);
}

.learn-hero__media-title {
	font-family: var(--font-family-display);
	font-size: 1.25rem;
	font-weight: 700;
	margin: 0 0 var(--space-xs) 0;
	color: var(--color-espresso);
}

.learn-hero__media-desc {
	font-size: var(--font-size-sm);
	line-height: 1.55;
	color: var(--color-stone);
	margin: 0;
}

/* -------------------------------------------------------------------------
 * 3. Start Here: Orientation Pillars
 * ------------------------------------------------------------------------- */
.learn-orientation {
	background: var(--color-sand);
	padding-top: var(--space-3xl);
	padding-bottom: var(--space-3xl);
	border-top: 1px solid var(--color-dune);
	border-bottom: 1px solid var(--color-dune);
}

.learn-orientation-grid {
	display: grid;
	grid-template-columns: 1fr;
	gap: var(--space-lg);
	margin-top: var(--space-xl);
}

@media (min-width: 600px) {
	.learn-orientation-grid {
		grid-template-columns: repeat(2, minmax(0, 1fr));
	}
}

@media (min-width: 1100px) {
	.learn-orientation-grid {
		grid-template-columns: repeat(4, minmax(0, 1fr));
	}
}

.learn-orientation-card {
	display: flex;
	flex-direction: column;
	min-width: 0;
	padding: var(--space-xl);
	background: var(--color-chalk);
	border: 1px solid var(--color-dune);
	border-radius: var(--radius-lg);
	height: 100%;
}

.learn-orientation-card__icon {
	color: var(--color-fern);
	margin-bottom: var(--space-md);
}

.learn-orientation-card__title {
	font-family: var(--font-family-display);
	font-size: 1.2rem;
	font-weight: 700;
	color: var(--color-espresso);
	margin: 0 0 var(--space-sm) 0;
}

.learn-orientation-card__text {
	font-size: var(--font-size-sm);
	line-height: 1.6;
	color: var(--color-stone);
	margin: 0 0 var(--space-lg) 0;
	flex-grow: 1;
}

.learn-orientation-card__tag {
	align-self: flex-start;
}

/* -------------------------------------------------------------------------
 * 4. Featured Learning Guides
 * ------------------------------------------------------------------------- */
.learn-featured {
	padding-top: var(--space-4xl);
	padding-bottom: var(--space-3xl);
}

.learn-featured-grid {
	display: grid;
	grid-template-columns: 1fr;
	gap: var(--space-2xl);
	margin-top: var(--space-xl);
}

@media (min-width: 860px) {
	.learn-featured-grid {
		grid-template-columns: repeat(2, minmax(0, 1fr));
	}
}

.learn-featured-card {
	display: flex;
	flex-direction: column;
	min-width: 0;
	border: 1px solid var(--color-dune);
	border-radius: var(--radius-xl);
	background: var(--color-chalk);
	overflow: hidden;
	box-shadow: var(--shadow-sm);
	transition: transform var(--motion-duration-fast) var(--motion-ease-default),
				box-shadow var(--motion-duration-fast) var(--motion-ease-default);
}

.learn-featured-card:hover {
	transform: translateY(-4px);
	box-shadow: var(--shadow-md);
}

.learn-featured-card__media {
	position: relative;
	aspect-ratio: 1376 / 768;
	width: 100%;
	background-color: var(--color-sand);
	overflow: hidden;
}

.learn-featured-card__img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	display: block;
	transition: transform var(--motion-duration-normal) var(--motion-ease-default);
}

.learn-featured-card:hover .learn-featured-card__img {
	transform: scale(1.02);
}

.learn-featured-card__badge-row {
	position: absolute;
	top: var(--space-sm);
	left: var(--space-sm);
	right: var(--space-sm);
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	justify-content: space-between;
	gap: var(--space-xs);
}

.learn-featured-card__disclaimer {
	font-family: var(--font-family-data);
	font-size: 0.68rem;
	padding: 4px 8px;
	border-radius: var(--radius-sm);
	background: rgba(46, 42, 34, 0.85);
	backdrop-filter: blur(4px);
	color: var(--color-bone);
	letter-spacing: 0.03em;
}

.learn-featured-card__body {
	padding: var(--space-xl);
	display: flex;
	flex-direction: column;
	flex-grow: 1;
}

.learn-featured-card__meta {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: var(--space-sm);
	font-family: var(--font-family-data);
	font-size: var(--font-size-xs);
	color: var(--color-stone);
	margin-bottom: var(--space-sm);
}

.learn-meta-time {
	display: inline-flex;
	align-items: center;
	gap: 4px;
}

.learn-meta-dino strong {
	color: var(--color-fern);
}

.learn-featured-card__title {
	font-family: var(--font-family-display);
	font-size: clamp(1.25rem, 1.1rem + 0.8vw, 1.6rem);
	font-weight: 700;
	line-height: 1.25;
	color: var(--color-espresso);
	margin: 0 0 var(--space-sm) 0;
}

.learn-featured-card__text {
	font-size: var(--font-size-md);
	line-height: 1.6;
	color: var(--color-stone);
	margin: 0 0 var(--space-xl) 0;
	flex-grow: 1;
}

.learn-featured-card__footer {
	margin-top: auto;
}

/* -------------------------------------------------------------------------
 * 5. Complete Knowledge Archive & Toolbar
 * ------------------------------------------------------------------------- */
.learn-catalog {
	padding-top: var(--space-3xl);
	padding-bottom: var(--space-4xl);
	background-color: var(--color-bone);
}

.learn-toolbar {
	display: flex;
	flex-direction: column;
	gap: var(--space-lg);
	margin-top: var(--space-xl);
	margin-bottom: var(--space-xl);
	padding: var(--space-lg);
	background: var(--color-chalk);
	border: 1px solid var(--color-dune);
	border-radius: var(--radius-xl);
}

/* Topic Pills */
.learn-topic-pills {
	display: flex;
	flex-wrap: wrap;
	gap: var(--space-xs);
}

.learn-topic-pill {
	display: inline-flex;
	align-items: center;
	gap: var(--space-xs);
	min-height: 44px;
	padding: var(--space-xs) var(--space-md);
	border-radius: var(--radius-pill);
	border: 1px solid var(--color-dune);
	background: var(--color-bone);
	color: var(--color-espresso);
	font-family: var(--font-family-data);
	font-size: var(--font-size-xs);
	font-weight: 600;
	cursor: pointer;
	transition: all var(--motion-duration-fast) var(--motion-ease-default);
}

.learn-topic-pill:hover {
	border-color: var(--color-fern);
	background: var(--color-sand);
}

.learn-topic-pill:focus-visible {
	outline: 2px solid var(--color-fern);
	outline-offset: 2px;
}

.learn-topic-pill.is-active {
	background: var(--color-fern);
	border-color: var(--color-fern);
	color: var(--color-bone);
}

.learn-topic-pill__count {
	display: inline-block;
	padding: 1px 6px;
	font-size: 0.72rem;
	border-radius: var(--radius-pill);
	background: rgba(46, 42, 34, 0.08);
	color: inherit;
}

.learn-topic-pill.is-active .learn-topic-pill__count {
	background: rgba(255, 250, 240, 0.25);
}

/* Search Filter */
.learn-search-filter {
	width: 100%;
}

.learn-search-input-wrap {
	position: relative;
	display: flex;
	align-items: center;
	width: 100%;
}

.learn-search-icon {
	position: absolute;
	left: var(--space-md);
	color: var(--color-stone);
	pointer-events: none;
}

.learn-search-input {
	width: 100%;
	min-height: 48px;
	padding-left: 2.75rem;
	padding-right: 2.75rem;
	border: 1px solid var(--color-dune);
	border-radius: var(--radius-md);
	background: var(--color-bone);
	color: var(--color-espresso);
	font-size: var(--font-size-md);
}

.learn-search-input:focus {
	border-color: var(--color-fern);
	outline: 2px solid var(--color-fern);
	outline-offset: 1px;
}

.learn-search-clear {
	position: absolute;
	right: var(--space-xs);
	min-width: 44px;
	min-height: 44px;
	display: flex;
	align-items: center;
	justify-content: center;
	background: transparent;
	border: none;
	font-size: 1.4rem;
	color: var(--color-stone);
	cursor: pointer;
	border-radius: var(--radius-sm);
}

.learn-search-clear:hover {
	color: var(--color-clay);
}

/* Live Results Status */
.learn-results-status {
	font-family: var(--font-family-data);
	font-size: var(--font-size-sm);
	color: var(--color-stone);
	margin-bottom: var(--space-lg);
}

/* Complete Guides Grid */
.learn-guides-grid {
	display: grid;
	grid-template-columns: 1fr;
	gap: var(--space-xl);
}

@media (min-width: 700px) {
	.learn-guides-grid {
		grid-template-columns: repeat(2, minmax(0, 1fr));
	}
}

@media (min-width: 1100px) {
	.learn-guides-grid {
		grid-template-columns: repeat(3, minmax(0, 1fr));
	}
}

.learn-guide-card {
	display: flex;
	flex-direction: column;
	min-width: 0;
	background: var(--color-chalk);
	border: 1px solid var(--color-dune);
	border-radius: var(--radius-lg);
	padding: var(--space-xl);
	box-shadow: var(--shadow-sm);
	transition: transform var(--motion-duration-fast) var(--motion-ease-default),
				box-shadow var(--motion-duration-fast) var(--motion-ease-default);
}

.learn-guide-card:hover {
	transform: translateY(-3px);
	box-shadow: var(--shadow-md);
}

.learn-guide-card__thumb {
	position: relative;
	aspect-ratio: 1376 / 768;
	width: calc(100% + var(--space-xl) * 2);
	margin-top: calc(var(--space-xl) * -1);
	margin-left: calc(var(--space-xl) * -1);
	margin-right: calc(var(--space-xl) * -1);
	margin-bottom: var(--space-md);
	overflow: hidden;
	border-top-left-radius: var(--radius-lg);
	border-top-right-radius: var(--radius-lg);
	background: var(--color-sand);
}

.learn-guide-card__thumb-img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	display: block;
}

.learn-guide-card__thumb-label {
	position: absolute;
	bottom: var(--space-2xs);
	right: var(--space-2xs);
	font-family: var(--font-family-data);
	font-size: 0.65rem;
	padding: 2px 6px;
	border-radius: var(--radius-sm);
	background: rgba(46, 42, 34, 0.85);
	color: var(--color-bone);
}

.learn-guide-card__header {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: var(--space-xs);
	margin-bottom: var(--space-sm);
}

.learn-guide-card__read-time {
	display: inline-flex;
	align-items: center;
	gap: 4px;
	font-family: var(--font-family-data);
	font-size: var(--font-size-xs);
	color: var(--color-stone);
}

.learn-guide-card__title {
	font-family: var(--font-family-display);
	font-size: 1.25rem;
	font-weight: 700;
	line-height: 1.25;
	color: var(--color-espresso);
	margin: 0 0 var(--space-sm) 0;
}

.learn-guide-card__excerpt {
	font-size: var(--font-size-sm);
	line-height: 1.6;
	color: var(--color-stone);
	margin: 0 0 var(--space-md) 0;
	flex-grow: 1;
}

.learn-guide-card__specimen-tag {
	font-family: var(--font-family-data);
	font-size: var(--font-size-xs);
	padding: var(--space-2xs) var(--space-xs);
	background: var(--color-sand);
	border-radius: var(--radius-sm);
	margin-bottom: var(--space-md);
	display: inline-flex;
	align-items: center;
	gap: 4px;
}

.learn-specimen-label {
	color: var(--color-stone);
}

.learn-guide-card__action {
	margin-top: auto;
}

.learn-guide-card__action .btn {
	padding-left: 0;
	color: var(--color-fern);
	font-weight: 700;
	display: inline-flex;
	align-items: center;
	gap: 6px;
	min-height: 44px;
}

.learn-guide-card__action .btn:hover {
	color: var(--color-clay);
}

/* Empty State */
.learn-empty-state {
	text-align: center;
	padding: var(--space-3xl) var(--space-xl);
	margin-top: var(--space-xl);
}

.learn-empty-state__icon {
	color: var(--color-stone);
	margin-bottom: var(--space-md);
}

.learn-empty-state__title {
	font-family: var(--font-family-display);
	font-size: 1.4rem;
	margin: 0 0 var(--space-sm) 0;
}

.learn-empty-state__text {
	color: var(--color-stone);
	margin: 0 0 var(--space-lg) 0;
}

/* -------------------------------------------------------------------------
 * 6. Dynamic Dinosaur CPT Relationship Cards
 * ------------------------------------------------------------------------- */
.learn-evidence-dinos {
	padding-top: var(--space-4xl);
	padding-bottom: var(--space-3xl);
	background: var(--color-sand);
	border-top: 1px solid var(--color-dune);
	border-bottom: 1px solid var(--color-dune);
}

.learn-evidence-grid {
	display: grid;
	grid-template-columns: 1fr;
	gap: var(--space-lg);
	margin-top: var(--space-xl);
}

@media (min-width: 600px) {
	.learn-evidence-grid {
		grid-template-columns: repeat(2, minmax(0, 1fr));
	}
}

@media (min-width: 900px) {
	.learn-evidence-grid {
		grid-template-columns: repeat(3, minmax(0, 1fr));
	}
}

@media (min-width: 1200px) {
	.learn-evidence-grid {
		grid-template-columns: repeat(5, minmax(0, 1fr));
	}
}

.learn-evidence-card {
	display: flex;
	flex-direction: column;
	min-width: 0;
	background: var(--color-chalk);
	border: 1px solid var(--color-dune);
	border-radius: var(--radius-lg);
	overflow: hidden;
	height: 100%;
}

.learn-evidence-card__media {
	position: relative;
	aspect-ratio: 16 / 10;
	background: var(--color-bone);
	overflow: hidden;
}

.learn-evidence-card__img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	display: block;
}

.learn-evidence-card__chip {
	position: absolute;
	top: var(--space-2xs);
	left: var(--space-2xs);
	font-size: 0.65rem;
}

.learn-evidence-card__body {
	padding: var(--space-md);
	display: flex;
	flex-direction: column;
	flex-grow: 1;
}

.learn-evidence-card__period {
	margin-bottom: var(--space-xs);
}

.learn-evidence-card__title {
	font-family: var(--font-family-display);
	font-size: 1.1rem;
	font-weight: 700;
	margin: 0 0 var(--space-2xs) 0;
	line-height: 1.25;
}

.learn-evidence-card__link {
	color: var(--color-espresso);
	text-decoration: none;
}

.learn-evidence-card__link:hover {
	color: var(--color-fern);
}

.learn-evidence-card__sci {
	font-size: var(--font-size-xs);
	color: var(--color-stone);
	margin: 0 0 var(--space-xs) 0;
}

.learn-evidence-card__formation {
	font-family: var(--font-family-data);
	font-size: 0.75rem;
	color: var(--color-stone);
	margin: 0 0 var(--space-md) 0;
	flex-grow: 1;
}

.learn-evidence-card__footer {
	margin-top: auto;
}

.learn-evidence-card__footer .btn {
	padding-left: 0;
	font-size: var(--font-size-xs);
	color: var(--color-fern);
	font-weight: 700;
}

/* -------------------------------------------------------------------------
 * 7. FAQ Section (Accordion)
 * ------------------------------------------------------------------------- */
.learn-faq {
	padding-top: var(--space-4xl);
	padding-bottom: var(--space-4xl);
}

.learn-faq-list {
	display: flex;
	flex-direction: column;
	gap: var(--space-md);
	margin-top: var(--space-xl);
}

.learn-faq-item {
	background: var(--color-chalk);
	border: 1px solid var(--color-dune);
	border-radius: var(--radius-lg);
	overflow: hidden;
	transition: border-color var(--motion-duration-fast) var(--motion-ease-default);
}

.learn-faq-item[open] {
	border-color: var(--color-fern);
}

.learn-faq-item__question {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: var(--space-md);
	padding: var(--space-lg) var(--space-xl);
	font-family: var(--font-family-display);
	font-size: 1.15rem;
	font-weight: 700;
	color: var(--color-espresso);
	cursor: pointer;
	min-height: 48px;
	user-select: none;
	list-style: none;
}

.learn-faq-item__question::-webkit-details-marker {
	display: none;
}

.learn-faq-item__question:hover {
	background: var(--color-sand);
}

.learn-faq-item__question:focus-visible {
	outline: 2px solid var(--color-fern);
	outline-offset: -2px;
}

.learn-faq-item__icon {
	color: var(--color-fern);
	display: flex;
	align-items: center;
	justify-content: center;
	transition: transform var(--motion-duration-fast) var(--motion-ease-default);
	flex-shrink: 0;
}

.learn-faq-item[open] .learn-faq-item__icon {
	transform: rotate(45deg);
	color: var(--color-clay);
}

.learn-faq-item__answer {
	padding: 0 var(--space-xl) var(--space-xl);
	font-size: var(--font-size-md);
	line-height: 1.7;
	color: var(--color-stone);
}

.learn-faq-item__answer p {
	margin: 0;
}

/* -------------------------------------------------------------------------
 * 8. Explore More Hub
 * ------------------------------------------------------------------------- */
.learn-explore-more {
	padding-top: var(--space-4xl);
	padding-bottom: var(--space-3xl);
	background: var(--color-bone);
}

.learn-explore-grid {
	display: grid;
	grid-template-columns: 1fr;
	gap: var(--space-lg);
	margin-top: var(--space-xl);
}

@media (min-width: 600px) {
	.learn-explore-grid {
		grid-template-columns: repeat(2, minmax(0, 1fr));
	}
}

@media (min-width: 1080px) {
	.learn-explore-grid {
		grid-template-columns: repeat(4, minmax(0, 1fr));
	}
}

.learn-explore-card {
	display: flex;
	flex-direction: column;
	min-width: 0;
	padding: var(--space-xl);
	background: var(--color-chalk);
	border: 1px solid var(--color-dune);
	border-radius: var(--radius-xl);
	text-decoration: none;
	color: inherit;
	height: 100%;
}

.learn-explore-card__badge {
	align-self: flex-start;
	margin-bottom: var(--space-sm);
}

.learn-explore-card__title {
	font-family: var(--font-family-display);
	font-size: 1.25rem;
	font-weight: 700;
	color: var(--color-espresso);
	margin: 0 0 var(--space-xs) 0;
}

.learn-explore-card__desc {
	font-size: var(--font-size-sm);
	line-height: 1.55;
	color: var(--color-stone);
	margin: 0 0 var(--space-lg) 0;
	flex-grow: 1;
}

.learn-explore-card .btn {
	padding-left: 0;
	font-weight: 700;
	color: var(--color-fern);
}

.learn-explore-card:hover .btn {
	color: var(--color-clay);
}

/* -------------------------------------------------------------------------
 * 9. Interactive Guide Reader Modal
 * ------------------------------------------------------------------------- */
.learn-modal {
	position: fixed;
	top: 0;
	left: 0;
	right: 0;
	bottom: 0;
	z-index: var(--z-modal, 2050);
	display: flex;
	align-items: center;
	justify-content: center;
	padding: var(--space-md);
}

.learn-modal[hidden] {
	display: none;
}

.learn-modal__backdrop {
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	bottom: 0;
	background: rgba(46, 42, 34, 0.7);
	backdrop-filter: blur(8px);
}

.learn-modal__dialog {
	position: relative;
	background: var(--color-bone);
	border: 1px solid var(--color-dune);
	border-radius: var(--radius-xl);
	max-width: 800px;
	width: 100%;
	max-height: 90vh;
	display: flex;
	flex-direction: column;
	box-shadow: var(--shadow-lg);
	overflow: hidden;
}

.learn-modal__header {
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: var(--space-lg) var(--space-xl);
	border-bottom: 1px solid var(--color-dune);
	background: var(--color-chalk);
}

.learn-modal__meta {
	display: flex;
	align-items: center;
	gap: var(--space-sm);
}

.learn-modal__time {
	font-family: var(--font-family-data);
	font-size: var(--font-size-xs);
	color: var(--color-stone);
}

.learn-modal__close {
	background: transparent;
	border: none;
	color: var(--color-espresso);
	cursor: pointer;
	min-width: 44px;
	min-height: 44px;
	display: flex;
	align-items: center;
	justify-content: center;
	border-radius: var(--radius-sm);
}

.learn-modal__close:hover {
	color: var(--color-clay);
}

.learn-modal__close:focus-visible {
	outline: 2px solid var(--color-fern);
	outline-offset: 2px;
}

.learn-modal__content-scroll {
	padding: var(--space-2xl) var(--space-xl);
	overflow-y: auto;
	flex-grow: 1;
}

.learn-modal__title {
	font-family: var(--font-family-display);
	font-size: clamp(1.6rem, 1.3rem + 1.2vw, 2.2rem);
	font-weight: 800;
	line-height: 1.2;
	color: var(--color-espresso);
	margin: 0 0 var(--space-md) 0;
}

.learn-modal__lead {
	font-size: var(--font-size-lg);
	line-height: 1.6;
	color: var(--color-stone);
	margin: 0 0 var(--space-xl) 0;
	border-left: 3px solid var(--color-fern);
	padding-left: var(--space-md);
}

.learn-modal__figure {
	margin: 0 0 var(--space-xl) 0;
	border-radius: var(--radius-lg);
	overflow: hidden;
	border: 1px solid var(--color-dune);
	background: var(--color-chalk);
}

.learn-modal__img {
	width: 100%;
	height: auto;
	display: block;
	aspect-ratio: 1376 / 768;
	object-fit: cover;
}

.learn-modal__caption {
	display: block;
	padding: var(--space-xs) var(--space-md);
	font-family: var(--font-family-data);
	font-size: var(--font-size-xs);
	color: var(--color-stone);
	background: var(--color-sand);
}

.learn-modal__body {
	font-size: var(--font-size-md);
	line-height: 1.75;
	color: var(--color-espresso);
}

.learn-modal__section {
	margin-bottom: var(--space-xl);
}

.learn-modal__heading {
	font-family: var(--font-family-display);
	font-size: 1.35rem;
	font-weight: 700;
	color: var(--color-espresso);
	margin: 0 0 var(--space-xs) 0;
}

.learn-modal__text {
	margin: 0;
	color: var(--color-stone);
}

.learn-modal__citations {
	margin-top: var(--space-2xl);
	padding-top: var(--space-xl);
	border-top: 1px solid var(--color-dune);
}

.learn-modal__citations-title {
	font-family: var(--font-family-data);
	font-size: var(--font-size-sm);
	text-transform: uppercase;
	letter-spacing: 0.05em;
	color: var(--color-stone);
	margin: 0 0 var(--space-sm) 0;
}

.learn-modal__citations-list {
	margin: 0;
	padding-left: var(--space-lg);
	font-size: var(--font-size-xs);
	color: var(--color-stone);
	line-height: 1.6;
}

.learn-modal__footer {
	padding: var(--space-md) var(--space-xl);
	border-top: 1px solid var(--color-dune);
	background: var(--color-chalk);
	display: flex;
	justify-content: flex-end;
}

/* -------------------------------------------------------------------------
 * 10. Prefers-Reduced-Motion
 * ------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
	.learn-featured-card,
	.learn-featured-card:hover,
	.learn-featured-card__img,
	.learn-guide-card,
	.learn-guide-card:hover,
	.learn-topic-pill,
	.learn-faq-item__icon {
		transition: none !important;
		transform: none !important;
	}
}