/**
 * Age of Dinosaurs — Timeline & Geological History Pillar Styles
 *
 * Implements the museum-grade Deep Time pillar experience:
 * - Panoramic paleoart hero with verified metrics
 * - Proportional Mesozoic duration visual bar
 * - Vertical chronological rail with period color accents
 * - Dynamic dinosaur specimen showcase cards
 * - Comparative paleogeography & 24-hour cosmic clock
 * - Accessible FAQ accordion
 *
 * Consumes design tokens from tokens.css.
 *
 * @package AgeOfDinosaurs
 */

/* ==========================================================================
   1. Pillar Page Wrapper & Breadcrumbs
   ========================================================================== */
.timeline-pillar-experience {
	background-color: var(--color-bg-primary);
	color: var(--color-espresso);
	width: 100%;
	overflow-x: clip; /* Clean container boundary */
}

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

.timeline-breadcrumbs .breadcrumbs__current {
	color: var(--color-text-primary);
	font-weight: var(--font-weight-bold);
}

/* ==========================================================================
   2. Hero Section
   ========================================================================== */
.timeline-hero {
	padding-top: clamp(2rem, 1.5rem + 2vw, 4rem);
	padding-bottom: clamp(2.5rem, 2rem + 2.5vw, 4.5rem);
	border-bottom: 1px solid var(--color-border-default);
	background: radial-gradient(circle at 50% 0%, rgba(234, 223, 200, 0.45) 0%, transparent 70%);
}

.timeline-hero__content {
	display: flex;
	flex-direction: column;
	align-items: center;
	text-align: center;
	max-width: 960px;
	margin: 0 auto;
}

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

.timeline-hero__meta-sep {
	color: var(--color-stone);
	opacity: 0.6;
}

.timeline-hero__dates {
	font-family: var(--font-family-data);
	font-size: var(--font-size-small);
	font-weight: var(--font-weight-medium);
	color: var(--color-stone);
	letter-spacing: 0.05em;
	text-transform: uppercase;
}

.timeline-hero__title {
	font-family: var(--font-family-heading);
	font-size: var(--font-size-h1);
	font-weight: var(--font-weight-extrabold);
	line-height: var(--line-height-heading);
	letter-spacing: var(--letter-spacing-tight);
	color: var(--color-espresso);
	margin: 0 0 var(--space-lg) 0;
}

.timeline-hero__deck {
	font-family: var(--font-family-body);
	font-size: clamp(1.125rem, 1.05rem + 0.35vw, 1.35rem);
	line-height: 1.65;
	color: var(--color-stone);
	margin: 0 0 var(--space-2xl) 0;
	max-width: 800px;
}

/* Metrics Grid */
.timeline-metrics-grid {
	display: grid;
	grid-template-columns: repeat(2, 1fr);
	gap: var(--space-md);
	width: 100%;
	margin-bottom: var(--space-2xl);
}

@media (min-width: 768px) {
	.timeline-metrics-grid {
		grid-template-columns: repeat(4, 1fr);
		gap: var(--space-lg);
	}
}

.timeline-metric-card {
	background-color: var(--color-bg-surface);
	border: 1px solid var(--color-border-default);
	border-radius: var(--radius-xl);
	padding: var(--space-lg) var(--space-md);
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	text-align: center;
	box-shadow: var(--shadow-sm);
	transition: transform var(--motion-duration-fast) var(--motion-ease-standard),
	            box-shadow var(--motion-duration-fast) var(--motion-ease-standard);
}

.timeline-metric-card:hover {
	transform: translateY(-2px);
	box-shadow: var(--shadow-md);
}

.timeline-metric-card__value {
	font-family: var(--font-family-heading);
	font-size: clamp(1.75rem, 1.5rem + 1vw, 2.5rem);
	font-weight: var(--font-weight-extrabold);
	line-height: 1;
	color: var(--color-deep-fern);
}

.timeline-metric-card__unit {
	font-family: var(--font-family-data);
	font-size: 0.75rem;
	font-weight: 700;
	color: var(--color-fern);
	text-transform: uppercase;
	letter-spacing: 0.05em;
	margin: 4px 0 6px 0;
}

.timeline-metric-card__label {
	font-family: var(--font-family-body);
	font-size: var(--font-size-small);
	color: var(--color-stone);
	line-height: 1.35;
}

/* Hero Visual Figure */
.timeline-hero__figure {
	width: 100%;
	margin: 0 0 var(--space-2xl) 0;
}

.timeline-hero__image-frame {
	position: relative;
	width: 100%;
	border-radius: var(--radius-2xl, 20px);
	overflow: hidden;
	border: 1px solid var(--color-border-default);
	box-shadow: var(--shadow-lg);
	background: radial-gradient(circle at center, #FFFAF0 0%, #EADFC8 100%);
	aspect-ratio: 16 / 9;
}

.timeline-hero__image {
	width: 100%;
	height: 100%;
	object-fit: cover;
	display: block;
}

.timeline-hero__caption {
	margin-top: var(--space-md);
	font-family: var(--font-family-body);
	font-size: var(--font-size-small);
	line-height: 1.5;
	color: var(--color-stone);
	text-align: left;
	background-color: var(--color-bg-secondary);
	padding: var(--space-md) var(--space-lg);
	border-radius: var(--radius-lg);
	border: 1px solid var(--color-border-default);
}

.timeline-hero__caption-tag {
	display: inline-block;
	font-family: var(--font-family-data);
	font-size: 0.6875rem;
	font-weight: 700;
	text-transform: uppercase;
	letter-spacing: 0.08em;
	color: var(--color-deep-fern);
	background-color: rgba(63, 125, 78, 0.12);
	padding: 2px 8px;
	border-radius: var(--radius-pill);
	margin-right: 6px;
}

/* Jump Navigation */
.timeline-jump-nav {
	width: 100%;
	display: flex;
	flex-direction: column;
	align-items: center;
	gap: var(--space-sm);
	padding: var(--space-md);
	background-color: var(--color-bg-surface);
	border: 1px solid var(--color-border-default);
	border-radius: var(--radius-xl);
}

.timeline-jump-nav__label {
	font-family: var(--font-family-data);
	font-size: var(--font-size-small);
	font-weight: 600;
	color: var(--color-stone);
	text-transform: uppercase;
	letter-spacing: 0.05em;
}

.timeline-jump-nav__list {
	display: flex;
	flex-wrap: wrap;
	justify-content: center;
	gap: var(--space-xs);
	list-style: none;
	margin: 0;
	padding: 0;
}

.timeline-jump-link {
	display: inline-flex;
	align-items: center;
	min-height: 40px;
	padding: 6px 14px;
	border-radius: var(--radius-pill);
	font-family: var(--font-family-body);
	font-size: var(--font-size-small);
	font-weight: var(--font-weight-semibold);
	text-decoration: none;
	color: var(--color-espresso);
	background-color: var(--color-bg-secondary);
	border: 1px solid var(--color-border-default);
	transition: all var(--motion-duration-fast) var(--motion-ease-standard);
}

@media (max-width: 768px) {
	.timeline-jump-link {
		min-height: 44px;
	}
}

.timeline-jump-link:hover,
.timeline-jump-link:focus-visible {
	border-color: var(--color-fern);
	color: var(--color-deep-fern);
	background-color: rgba(63, 125, 78, 0.08);
}

.timeline-jump-link--triassic:hover {
	border-color: #D9894B;
	color: #B8601E;
	background-color: #FDF3EC;
}

.timeline-jump-link--jurassic:hover {
	border-color: #3F7D4E;
	color: #1F4A32;
	background-color: #EDF5EF;
}

.timeline-jump-link--cretaceous:hover {
	border-color: #4FA6A0;
	color: #286F6B;
	background-color: #EDF7F6;
}

/* ==========================================================================
   3. Editorial Intro & Prose Container
   ========================================================================== */
.timeline-intro-section {
	padding-top: clamp(2.5rem, 2rem + 2vw, 4rem);
	padding-bottom: clamp(1.5rem, 1rem + 1.5vw, 2.5rem);
}

.timeline-section-title {
	font-family: var(--font-family-heading);
	font-size: var(--font-size-h2);
	font-weight: var(--font-weight-bold);
	line-height: var(--line-height-heading);
	color: var(--color-espresso);
	margin: 0 0 var(--space-md) 0;
	text-align: center;
}

.timeline-prose {
	font-family: var(--font-family-body);
	font-size: 1.125rem;
	line-height: 1.8;
	color: var(--color-espresso);
}

.timeline-prose p {
	margin-top: 0;
	margin-bottom: 1.5rem;
}

/* ==========================================================================
   4. Proportional Duration Scale Bar
   ========================================================================== */
.timeline-scale-section {
	padding-bottom: clamp(2rem, 1.5rem + 1.5vw, 3.5rem);
}

.timeline-scale-card {
	background-color: var(--color-bg-surface);
	border: 1px solid var(--color-border-default);
	border-radius: var(--radius-2xl, 20px);
	padding: clamp(1.5rem, 1rem + 1.5vw, 2.5rem);
	box-shadow: var(--shadow-sm);
}

.timeline-scale-card__title {
	font-family: var(--font-family-heading);
	font-size: 1.35rem;
	font-weight: var(--font-weight-bold);
	color: var(--color-espresso);
	margin: 0 0 0.5rem 0;
	text-align: center;
}

.timeline-scale-card__subtitle {
	font-family: var(--font-family-body);
	font-size: var(--font-size-small);
	color: var(--color-stone);
	text-align: center;
	margin: 0 0 var(--space-xl) 0;
}

.timeline-bar {
	display: flex;
	flex-direction: column;
	border-radius: var(--radius-lg);
	overflow: hidden;
	box-shadow: var(--shadow-md);
	border: 1px solid var(--color-border-default);
	margin-bottom: var(--space-xl);
}

@media (min-width: 640px) {
	.timeline-bar {
		flex-direction: row;
		min-height: 84px;
	}
}

.timeline-bar__segment {
	padding: var(--space-md);
	display: flex;
	flex-direction: column;
	justify-content: center;
	color: #FFFFFF;
	transition: filter var(--motion-duration-fast) var(--motion-ease-standard);
}

.timeline-bar__segment--triassic {
	background-color: #C87532; /* Triassic warm ochre */
}

.timeline-bar__segment--jurassic {
	background-color: #3F7D4E; /* Jurassic lush fern */
}

.timeline-bar__segment--cretaceous {
	background-color: #3E8D88; /* Cretaceous lagoon teal */
}

.timeline-bar__segment:hover {
	filter: brightness(1.08);
}

.timeline-bar__meta {
	display: flex;
	flex-direction: column;
	gap: 2px;
}

.timeline-bar__period {
	font-family: var(--font-family-heading);
	font-size: 1.125rem;
	font-weight: var(--font-weight-bold);
	line-height: 1.2;
}

.timeline-bar__dates {
	font-family: var(--font-family-data);
	font-size: 0.8125rem;
	font-weight: 500;
	opacity: 0.95;
}

.timeline-bar__duration {
	font-family: var(--font-family-data);
	font-size: 0.6875rem;
	opacity: 0.85;
	text-transform: uppercase;
}

.timeline-scale-card__callout {
	background-color: var(--color-bg-secondary);
	border-left: 4px solid var(--color-fern);
	border-radius: 0 var(--radius-md) var(--radius-md) 0;
	padding: var(--space-md) var(--space-lg);
	font-family: var(--font-family-body);
	font-size: var(--font-size-small);
	color: var(--color-espresso);
	line-height: 1.6;
}

.timeline-scale-card__callout p {
	margin: 4px 0 0 0;
}

/* ==========================================================================
   5. Vertical Timeline Rail & Period Blocks
   ========================================================================== */
.timeline-rail-wrapper {
	position: relative;
	padding-top: var(--space-xl);
	padding-bottom: var(--space-3xl);
}

.timeline-period-block {
	position: relative;
	margin-bottom: clamp(3rem, 2.5rem + 3vw, 5.5rem);
	background-color: var(--color-bg-surface);
	border: 1px solid var(--color-border-default);
	border-radius: var(--radius-2xl, 24px);
	padding: clamp(1.5rem, 1rem + 2vw, 3rem);
	box-shadow: var(--shadow-md);
	scroll-margin-top: 90px;
}

/* Period Accent Borders */
.timeline-period-block--triassic {
	border-top: 6px solid #D9894B;
}

.timeline-period-block--jurassic {
	border-top: 6px solid #3F7D4E;
}

.timeline-period-block--cretaceous {
	border-top: 6px solid #4FA6A0;
}

.timeline-period-header {
	margin-bottom: var(--space-2xl);
	padding-bottom: var(--space-xl);
	border-bottom: 1px solid var(--color-border-default);
}

.timeline-period-header__badge-wrap {
	display: flex;
	align-items: center;
	gap: var(--space-sm);
	flex-wrap: wrap;
	margin-bottom: var(--space-sm);
}

.timeline-period-header__range {
	font-family: var(--font-family-data);
	font-size: var(--font-size-small);
	font-weight: 600;
	color: var(--color-stone);
}

.timeline-period-header__title {
	font-family: var(--font-family-heading);
	font-size: var(--font-size-h2);
	font-weight: var(--font-weight-bold);
	color: var(--color-espresso);
	line-height: var(--line-height-heading);
	margin: 0 0 var(--space-sm) 0;
}

.timeline-period-header__lead {
	font-family: var(--font-family-body);
	font-size: clamp(1.05rem, 1rem + 0.25vw, 1.25rem);
	line-height: 1.6;
	color: var(--color-stone);
	margin: 0;
	max-width: 860px;
}

/* Narrative Cards Grid */
.timeline-period-grid {
	display: grid;
	grid-template-columns: 1fr;
	gap: var(--space-lg);
	margin-bottom: var(--space-2xl);
}

@media (min-width: 860px) {
	.timeline-period-grid {
		grid-template-columns: repeat(3, 1fr);
	}
}

.timeline-period-card {
	background-color: var(--color-bg-secondary);
	border: 1px solid var(--color-border-default);
	border-radius: var(--radius-xl);
	padding: var(--space-lg);
	display: flex;
	flex-direction: column;
	gap: var(--space-sm);
}

.timeline-period-card__heading {
	display: flex;
	align-items: center;
	gap: var(--space-xs);
	font-family: var(--font-family-heading);
	font-size: 1.125rem;
	font-weight: var(--font-weight-bold);
	color: var(--color-espresso);
	margin: 0;
}

.timeline-period-card__heading svg {
	color: var(--color-fern);
	flex-shrink: 0;
}

.timeline-period-card p {
	font-family: var(--font-family-body);
	font-size: var(--font-size-small);
	line-height: 1.65;
	color: var(--color-espresso);
	margin: 0;
}

/* Showcase Section Inside Periods */
.timeline-showcase {
	background-color: var(--color-bg-primary);
	border: 1px solid var(--color-border-default);
	border-radius: var(--radius-xl);
	padding: clamp(1rem, 0.75rem + 1vw, 2rem);
}

.timeline-showcase__header {
	display: flex;
	flex-direction: column;
	gap: 4px;
	margin-bottom: var(--space-lg);
}

@media (min-width: 600px) {
	.timeline-showcase__header {
		flex-direction: row;
		align-items: center;
		justify-content: space-between;
	}
}

.timeline-showcase__title {
	font-family: var(--font-family-heading);
	font-size: 1.25rem;
	font-weight: var(--font-weight-bold);
	color: var(--color-espresso);
	margin: 0;
}

.timeline-showcase__count {
	font-family: var(--font-family-data);
	font-size: 0.8125rem;
	color: var(--color-stone);
	text-transform: uppercase;
	letter-spacing: 0.05em;
}

.timeline-showcase__grid {
	display: grid;
	grid-template-columns: 1fr;
	gap: var(--space-md);
}

@media (min-width: 640px) {
	.timeline-showcase__grid {
		grid-template-columns: repeat(2, 1fr);
	}
}

@media (min-width: 1024px) {
	.timeline-showcase__grid {
		grid-template-columns: repeat(3, 1fr);
	}
}

/* Individual Specimen Showcase Card */
.timeline-dino-card {
	display: flex;
	flex-direction: column;
	background-color: var(--color-bg-surface);
	border: 1px solid var(--color-border-default);
	border-radius: var(--radius-lg);
	overflow: hidden;
	box-shadow: var(--shadow-xs);
	transition: transform var(--motion-duration-fast) var(--motion-ease-standard),
	            box-shadow var(--motion-duration-fast) var(--motion-ease-standard);
}

.timeline-dino-card:hover {
	transform: translateY(-2px);
	box-shadow: var(--shadow-md);
}

.timeline-dino-card__visual {
	position: relative;
	margin: 0;
	aspect-ratio: 16 / 10;
	background: radial-gradient(circle at center, #FFFAF0 0%, #EADFC8 100%);
	overflow: hidden;
}

.timeline-dino-card__visual img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	display: block;
	transition: transform var(--motion-duration-normal) var(--motion-ease-standard);
}

.timeline-dino-card:hover .timeline-dino-card__visual img {
	transform: scale(1.04);
}

.timeline-dino-card__diet {
	position: absolute;
	top: var(--space-xs);
	right: var(--space-xs);
	z-index: 2;
	font-size: 0.6875rem;
	padding: 2px 8px;
}

.timeline-dino-card__content {
	display: flex;
	flex-direction: column;
	flex: 1;
	padding: var(--space-md);
}

.timeline-dino-card__title {
	font-family: var(--font-family-heading);
	font-size: 1.125rem;
	font-weight: var(--font-weight-bold);
	margin: 0 0 2px 0;
	line-height: 1.3;
}

.timeline-dino-card__title a {
	color: var(--color-espresso);
	text-decoration: none;
	transition: color var(--motion-duration-fast) var(--motion-ease-standard);
}

.timeline-dino-card__title a:hover {
	color: var(--color-fern);
}

.timeline-dino-card__sci {
	font-family: var(--font-family-body);
	font-size: 0.8125rem;
	color: var(--color-stone);
	font-style: italic;
	margin: 0 0 var(--space-xs) 0;
}

.timeline-dino-card__meta {
	display: flex;
	align-items: center;
	gap: 6px;
	font-family: var(--font-family-data);
	font-size: 0.75rem;
	color: var(--color-stone);
	margin-bottom: var(--space-xs);
}

.timeline-dino-card__divider {
	opacity: 0.5;
}

.timeline-dino-card__rock {
	font-family: var(--font-family-body);
	font-size: 0.75rem;
	color: var(--color-stone);
	margin: 0 0 var(--space-md) 0;
	flex: 1;
}

.timeline-dino-card__btn {
	margin-top: auto;
	width: 100%;
}

/* Curation in-progress card */
.timeline-curation-card {
	padding: var(--space-lg);
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	text-align: center;
	background-color: var(--color-bg-secondary);
	border: 1px dashed var(--color-border-default);
	border-radius: var(--radius-lg);
}

.timeline-curation-card__icon {
	color: var(--color-fern);
	margin-bottom: var(--space-xs);
}

.timeline-curation-card__title {
	font-family: var(--font-family-heading);
	font-size: 1rem;
	font-weight: var(--font-weight-bold);
	color: var(--color-espresso);
	margin: 0 0 var(--space-xs) 0;
}

.timeline-curation-card__text {
	font-family: var(--font-family-body);
	font-size: 0.8125rem;
	line-height: 1.5;
	color: var(--color-stone);
	margin: 0;
}

/* ==========================================================================
   6. Key Milestones Section
   ========================================================================== */
.timeline-events-section {
	padding-top: clamp(2.5rem, 2rem + 2vw, 4.5rem);
	padding-bottom: clamp(2.5rem, 2rem + 2vw, 4.5rem);
	background-color: var(--color-bg-secondary);
	border-top: 1px solid var(--color-border-default);
	border-bottom: 1px solid var(--color-border-default);
}

.timeline-section-header {
	text-align: center;
	max-width: 760px;
	margin: 0 auto var(--space-2xl) auto;
}

.timeline-section-deck {
	font-family: var(--font-family-body);
	font-size: 1.125rem;
	color: var(--color-stone);
	margin: var(--space-sm) 0 0 0;
}

.timeline-milestones-list {
	display: flex;
	flex-direction: column;
	gap: var(--space-md);
	max-width: 860px;
	margin: 0 auto;
}

.timeline-milestone-item {
	display: grid;
	grid-template-columns: 1fr;
	gap: var(--space-xs);
	background-color: var(--color-bg-surface);
	border: 1px solid var(--color-border-default);
	border-radius: var(--radius-xl);
	padding: var(--space-md) var(--space-lg);
	box-shadow: var(--shadow-xs);
}

@media (min-width: 640px) {
	.timeline-milestone-item {
		grid-template-columns: 130px 1fr;
		gap: var(--space-lg);
		align-items: center;
	}
}

.timeline-milestone-item__date {
	font-family: var(--font-family-data);
	font-size: 0.9375rem;
	font-weight: 700;
	color: var(--color-deep-fern);
	background-color: rgba(63, 125, 78, 0.1);
	padding: 6px 12px;
	border-radius: var(--radius-pill);
	display: inline-block;
	text-align: center;
}

.timeline-milestone-item__content h3 {
	font-family: var(--font-family-heading);
	font-size: 1.125rem;
	font-weight: var(--font-weight-bold);
	color: var(--color-espresso);
	margin: 0 0 4px 0;
}

.timeline-milestone-item__content p {
	font-family: var(--font-family-body);
	font-size: var(--font-size-small);
	line-height: 1.55;
	color: var(--color-stone);
	margin: 0;
}

/* ==========================================================================
   7. Earth Then vs Earth Now (Comparative Table)
   ========================================================================== */
.timeline-comparison-section {
	padding-top: clamp(2.5rem, 2rem + 2vw, 4.5rem);
	padding-bottom: clamp(2.5rem, 2rem + 2vw, 4.5rem);
}

.timeline-comparison-table-wrapper {
	overflow-x: auto;
	border: 1px solid var(--color-border-default);
	border-radius: var(--radius-xl);
	background-color: var(--color-bg-surface);
	box-shadow: var(--shadow-sm);
}

.timeline-comparison-table {
	width: 100%;
	border-collapse: collapse;
	text-align: left;
	font-family: var(--font-family-body);
	font-size: var(--font-size-small);
}

.timeline-comparison-table th,
.timeline-comparison-table td {
	padding: var(--space-md) var(--space-lg);
	border-bottom: 1px solid var(--color-border-default);
	vertical-align: top;
	line-height: 1.6;
}

.timeline-comparison-table thead th {
	background-color: var(--color-bg-secondary);
	font-family: var(--font-family-heading);
	font-weight: var(--font-weight-bold);
	color: var(--color-espresso);
	font-size: 0.9375rem;
	border-bottom: 2px solid var(--color-border-default);
}

.timeline-comparison-table tbody tr:last-child th,
.timeline-comparison-table tbody tr:last-child td {
	border-bottom: none;
}

.timeline-comparison-table tbody tr:hover {
	background-color: rgba(234, 223, 200, 0.25);
}

/* ==========================================================================
   8. Lifespan Concepts Grid
   ========================================================================== */
.timeline-lifespan-section {
	padding-top: clamp(2.5rem, 2rem + 2vw, 4rem);
	padding-bottom: clamp(2.5rem, 2rem + 2vw, 4rem);
	background-color: var(--color-bg-secondary);
	border-top: 1px solid var(--color-border-default);
	border-bottom: 1px solid var(--color-border-default);
}

.timeline-concept-grid {
	display: flex;
	flex-direction: column;
	gap: var(--space-md);
	margin-top: var(--space-xl);
}

.timeline-concept-card {
	background-color: var(--color-bg-surface);
	border: 1px solid var(--color-border-default);
	border-radius: var(--radius-xl);
	padding: var(--space-lg);
	box-shadow: var(--shadow-xs);
}

.timeline-concept-card__title {
	font-family: var(--font-family-heading);
	font-size: 1.1875rem;
	font-weight: var(--font-weight-bold);
	color: var(--color-espresso);
	margin: 0 0 var(--space-xs) 0;
}

.timeline-concept-card p {
	font-family: var(--font-family-body);
	font-size: var(--font-size-small);
	line-height: 1.6;
	color: var(--color-stone);
	margin: 0;
}

/* ==========================================================================
   9. Famous Dinosaurs & Deep Time Mindbender
   ========================================================================== */
.timeline-famous-section {
	padding-top: clamp(2.5rem, 2rem + 2vw, 4.5rem);
	padding-bottom: clamp(2.5rem, 2rem + 2vw, 4.5rem);
}

.timeline-mindbender-card {
	display: flex;
	gap: var(--space-md);
	background: linear-gradient(135deg, #FEF7E6 0%, #FAECE8 100%);
	border: 1px solid rgba(232, 155, 28, 0.35);
	border-radius: var(--radius-xl);
	padding: var(--space-xl);
	margin-bottom: var(--space-2xl);
	box-shadow: var(--shadow-sm);
}

.timeline-mindbender-card__accent {
	font-size: 2rem;
	line-height: 1;
	flex-shrink: 0;
}

.timeline-mindbender-card__title {
	font-family: var(--font-family-heading);
	font-size: 1.25rem;
	font-weight: var(--font-weight-bold);
	color: var(--color-espresso);
	margin: 0 0 var(--space-xs) 0;
}

.timeline-mindbender-card p {
	font-family: var(--font-family-body);
	font-size: 1rem;
	line-height: 1.6;
	color: var(--color-espresso);
	margin: 0 0 var(--space-xs) 0;
}

.timeline-mindbender-card__highlight {
	font-weight: var(--font-weight-bold);
	color: var(--color-clay);
	margin: 0 !important;
}

.timeline-famous-grid {
	display: grid;
	grid-template-columns: 1fr;
	gap: var(--space-lg);
}

@media (min-width: 600px) {
	.timeline-famous-grid {
		grid-template-columns: repeat(2, 1fr);
	}
}

@media (min-width: 992px) {
	.timeline-famous-grid {
		grid-template-columns: repeat(3, 1fr);
	}
}

.timeline-famous-card {
	background-color: var(--color-bg-surface);
	border: 1px solid var(--color-border-default);
	border-radius: var(--radius-xl);
	overflow: hidden;
	display: flex;
	flex-direction: column;
	box-shadow: var(--shadow-sm);
	transition: transform var(--motion-duration-fast) var(--motion-ease-standard),
	            box-shadow var(--motion-duration-fast) var(--motion-ease-standard);
}

.timeline-famous-card:hover {
	transform: translateY(-2px);
	box-shadow: var(--shadow-md);
}

.timeline-famous-card__visual {
	position: relative;
	margin: 0;
	aspect-ratio: 16 / 10;
	background: radial-gradient(circle at center, #FFFAF0 0%, #EADFC8 100%);
	overflow: hidden;
}

.timeline-famous-card__visual img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	display: block;
}

.timeline-famous-card__period {
	position: absolute;
	top: var(--space-xs);
	right: var(--space-xs);
	z-index: 2;
}

.timeline-famous-card__content {
	display: flex;
	flex-direction: column;
	flex: 1;
	padding: var(--space-md);
}

.timeline-famous-card__title {
	font-family: var(--font-family-heading);
	font-size: 1.125rem;
	font-weight: var(--font-weight-bold);
	margin: 0 0 2px 0;
}

.timeline-famous-card__title a {
	color: var(--color-espresso);
	text-decoration: none;
}

.timeline-famous-card__title a:hover {
	color: var(--color-fern);
}

.timeline-famous-card__sci {
	font-family: var(--font-family-body);
	font-size: 0.8125rem;
	color: var(--color-stone);
	font-style: italic;
	margin: 0 0 var(--space-xs) 0;
}

.timeline-famous-card__meta {
	display: flex;
	flex-direction: column;
	gap: 2px;
	font-family: var(--font-family-data);
	font-size: 0.75rem;
	color: var(--color-stone);
	margin-bottom: var(--space-md);
}

.timeline-famous-card__btn {
	margin-top: auto;
	width: 100%;
}

/* ==========================================================================
   10. 24-Hour Cosmic Clock Section
   ========================================================================== */
.timeline-clock-section {
	padding-bottom: clamp(2.5rem, 2rem + 2vw, 4.5rem);
}

.timeline-clock-card {
	background: linear-gradient(135deg, #1F4A32 0%, #2E2A22 100%);
	color: var(--color-bone);
	border-radius: var(--radius-2xl, 24px);
	padding: clamp(1.5rem, 1rem + 2vw, 3rem);
	box-shadow: var(--shadow-lg);
}

.timeline-clock-card__header {
	text-align: center;
	max-width: 760px;
	margin: 0 auto var(--space-2xl) auto;
}

.timeline-clock-card__title {
	font-family: var(--font-family-heading);
	font-size: var(--font-size-h2);
	color: var(--color-bone);
	margin: var(--space-xs) 0 var(--space-xs) 0;
}

.timeline-clock-card__subtitle {
	font-family: var(--font-family-body);
	font-size: 1rem;
	color: var(--color-dune);
	margin: 0;
}

.timeline-clock-grid {
	display: grid;
	grid-template-columns: 1fr;
	gap: var(--space-md);
}

@media (min-width: 640px) {
	.timeline-clock-grid {
		grid-template-columns: repeat(2, 1fr);
	}
}

@media (min-width: 1024px) {
	.timeline-clock-grid {
		grid-template-columns: repeat(4, 1fr);
	}
}

.timeline-clock-event {
	background-color: rgba(246, 240, 227, 0.08);
	border: 1px solid rgba(246, 240, 227, 0.15);
	border-radius: var(--radius-lg);
	padding: var(--space-md);
	display: flex;
	flex-direction: column;
	gap: var(--space-xs);
}

.timeline-clock-event--highlight {
	background-color: rgba(232, 155, 28, 0.15);
	border-color: rgba(232, 155, 28, 0.5);
}

.timeline-clock-event__time {
	font-family: var(--font-family-data);
	font-size: 0.8125rem;
	font-weight: 700;
	color: var(--color-amber);
	letter-spacing: 0.05em;
}

.timeline-clock-event__title {
	font-family: var(--font-family-heading);
	font-size: 1.05rem;
	font-weight: var(--font-weight-bold);
	color: var(--color-bone);
	margin: 0;
}

.timeline-clock-event p {
	font-family: var(--font-family-body);
	font-size: 0.8125rem;
	line-height: 1.5;
	color: var(--color-dune);
	margin: 0;
}

/* ==========================================================================
   11. Extinction & Living Dinosaurs Section
   ========================================================================== */
.timeline-extinction-section {
	padding-top: clamp(2.5rem, 2rem + 2vw, 4.5rem);
	padding-bottom: clamp(2.5rem, 2rem + 2vw, 4.5rem);
	border-top: 1px solid var(--color-border-default);
}

.timeline-callout-box {
	background-color: rgba(63, 125, 78, 0.08);
	border-left: 4px solid var(--color-fern);
	border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
	padding: var(--space-lg);
	margin-top: var(--space-xl);
}

.timeline-callout-box__title {
	font-family: var(--font-family-heading);
	font-size: 1.25rem;
	font-weight: var(--font-weight-bold);
	color: var(--color-deep-fern);
	margin: 0 0 var(--space-xs) 0;
}

.timeline-callout-box p {
	font-family: var(--font-family-body);
	font-size: 1rem;
	line-height: 1.65;
	color: var(--color-espresso);
	margin: 0;
}

/* ==========================================================================
   12. Frequently Asked Questions (FAQ) Accordion
   ========================================================================== */
.timeline-faq-section {
	padding-top: clamp(2.5rem, 2rem + 2vw, 4.5rem);
	padding-bottom: clamp(2.5rem, 2rem + 2vw, 4.5rem);
	background-color: var(--color-bg-secondary);
	border-top: 1px solid var(--color-border-default);
	border-bottom: 1px solid var(--color-border-default);
}

.timeline-faq-accordion {
	display: flex;
	flex-direction: column;
	gap: var(--space-sm);
}

.timeline-faq-item {
	background-color: var(--color-bg-surface);
	border: 1px solid var(--color-border-default);
	border-radius: var(--radius-xl);
	overflow: hidden;
	transition: border-color var(--motion-duration-fast) var(--motion-ease-standard),
	            box-shadow var(--motion-duration-fast) var(--motion-ease-standard);
}

.timeline-faq-item[open] {
	border-color: var(--color-fern);
	box-shadow: var(--shadow-sm);
}

.timeline-faq-item__question {
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: var(--space-md) var(--space-lg);
	font-family: var(--font-family-heading);
	font-size: 1.05rem;
	font-weight: var(--font-weight-bold);
	color: var(--color-espresso);
	cursor: pointer;
	user-select: none;
	list-style: none; /* Hide default triangle */
	min-height: 48px;
}

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

.timeline-faq-item__question:focus-visible {
	outline: var(--focus-ring-width) solid var(--focus-ring-color);
	outline-offset: -2px;
}

.timeline-faq-item__chevron {
	color: var(--color-fern);
	transition: transform var(--motion-duration-fast) var(--motion-ease-standard);
	flex-shrink: 0;
	margin-left: var(--space-sm);
}

.timeline-faq-item[open] .timeline-faq-item__chevron {
	transform: rotate(180deg);
}

.timeline-faq-item__answer {
	padding: 0 var(--space-lg) var(--space-lg) var(--space-lg);
	font-family: var(--font-family-body);
	font-size: 0.9375rem;
	line-height: 1.7;
	color: var(--color-espresso);
	border-top: 1px solid rgba(216, 204, 178, 0.4);
	padding-top: var(--space-md);
}

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

/* ==========================================================================
   13. Explore Further & Topic Cluster Cards
   ========================================================================== */
.timeline-explore-section {
	padding-top: clamp(2.5rem, 2rem + 2vw, 4.5rem);
	padding-bottom: clamp(3rem, 2.5rem + 3vw, 5rem);
}

.timeline-explore-grid {
	display: grid;
	grid-template-columns: 1fr;
	gap: var(--space-lg);
}

@media (min-width: 768px) {
	.timeline-explore-grid {
		grid-template-columns: repeat(3, 1fr);
	}
}

.timeline-explore-card {
	background-color: var(--color-bg-surface);
	border: 1px solid var(--color-border-default);
	border-radius: var(--radius-xl);
	padding: var(--space-xl);
	display: flex;
	flex-direction: column;
	box-shadow: var(--shadow-sm);
	transition: transform var(--motion-duration-fast) var(--motion-ease-standard),
	            box-shadow var(--motion-duration-fast) var(--motion-ease-standard);
}

.timeline-explore-card:hover {
	transform: translateY(-2px);
	box-shadow: var(--shadow-md);
}

.timeline-explore-card__icon {
	font-size: 2rem;
	line-height: 1;
	margin-bottom: var(--space-sm);
}

.timeline-explore-card__title {
	font-family: var(--font-family-heading);
	font-size: 1.25rem;
	font-weight: var(--font-weight-bold);
	color: var(--color-espresso);
	margin: 0 0 var(--space-xs) 0;
}

.timeline-explore-card p {
	font-family: var(--font-family-body);
	font-size: var(--font-size-small);
	line-height: 1.6;
	color: var(--color-stone);
	margin: 0 0 var(--space-lg) 0;
	flex: 1;
}

.timeline-explore-card .btn {
	width: 100%;
}

/* ==========================================================================
   14. Reduced Motion
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
	.timeline-metric-card,
	.timeline-dino-card,
	.timeline-famous-card,
	.timeline-explore-card,
	.timeline-dino-card__visual img {
		transform: none !important;
		transition: none !important;
	}

	.timeline-faq-item__chevron {
		transition: none !important;
	}
}