/**
 * TDS Site Layer: Case Studies
 * Version: 2.2.0
 *
 * Scope:
 * - UX Lab case study archive support
 * - UX Lab case study single records
 *
 * Governance:
 * - Single pages are reading-first institutional records.
 * - No hero motif on single records.
 * - Header, metadata, figure, rail, and prose follow document rhythm.
 * - Uses TDS foundation tokens from tokens.css and typography.css.
 */

/* ==========================================================================
   0. Case Studies Archive
   ========================================================================== */

.uh-case-studies-archive {
	background: #ffffff;
}

.uh-case-studies-kicker {
	margin-bottom: 0.85rem;
	font-size: var(--tds-type-size-label);
	letter-spacing: var(--tds-type-track-label);
	color: var(--tds-brand-strong);
}

.uh-case-studies-archive .uh-case-studies-kicker {
	color: var(--tds-brand-strong);
}

.uh-case-archive-card {
	position: relative;
	display: flex;
	flex-direction: column;
	overflow: hidden;
	border: 1px solid var(--tds-border);
	border-radius: var(--tds-radius-md);
	background: #ffffff;
	transition:
		border-color var(--tds-motion-duration-standard) var(--tds-motion-easing-productive),
		box-shadow var(--tds-motion-duration-standard) var(--tds-motion-easing-productive),
		transform var(--tds-motion-duration-standard) var(--tds-motion-easing-productive);
}

.uh-case-archive-card:hover,
.uh-case-archive-card:focus-within {
	border-color: var(--tds-border-strong);
	box-shadow: 0 14px 30px rgba(15, 23, 42, 0.08);
	transform: translateY(-2px);
}

.uh-case-archive-card__media {
	display: block;
	overflow: hidden;
	background: #f3f4f6;
}

.uh-case-archive-card__media img {
	display: block;
	width: 100%;
	aspect-ratio: 16 / 9;
	object-fit: cover;
	transition: transform var(--tds-motion-duration-smooth) var(--tds-motion-easing-expressive);
}

.uh-case-archive-card:hover .uh-case-archive-card__media img,
.uh-case-archive-card:focus-within .uh-case-archive-card__media img {
	transform: scale(1.025);
}

.uh-case-archive-card__body {
	display: flex;
	flex: 1 1 auto;
	flex-direction: column;
	padding: var(--tds-space-04);
}

.uh-case-archive-card__eyebrow {
	margin: 0 0 0.75rem;
	font-family: var(--tds-font-system);
	font-size: var(--tds-type-size-label);
	font-weight: var(--tds-weight-medium);
	line-height: var(--tds-type-line-label);
	letter-spacing: var(--tds-type-track-label);
	text-transform: uppercase;
	color: var(--tds-text-muted);
}

.uh-case-archive-card__title {
	margin: 0 0 0.85rem;
	font-family: var(--tds-font-system);
	font-size: var(--tds-type-size-ui);
	font-weight: var(--tds-weight-medium);
	line-height: var(--tds-type-line-ui);
	letter-spacing: var(--tds-type-track-ui);
	color: var(--tds-text-main);
}

.uh-case-archive-card__link {
	color: inherit;
	text-decoration: none;
}

.uh-case-archive-card__link:hover,
.uh-case-archive-card__link:focus-visible {
	color: var(--tds-brand-strong);
	text-decoration: none;
}

.uh-case-archive-card__excerpt {
	margin: 0;
	font-family: var(--tds-font-system);
	font-size: var(--tds-type-size-ui);
	line-height: var(--tds-type-line-ui);
	color: var(--tds-text-muted);
}

.uh-case-archive-card__footer {
	margin-top: auto;
	padding-top: var(--tds-space-04);
}

.uh-case-archive-card__action {
	display: inline-flex;
	align-items: center;
	min-height: var(--tds-tap-target-min);
	font-family: var(--tds-font-system);
	font-size: var(--tds-type-size-label);
	font-weight: var(--tds-weight-medium);
	line-height: var(--tds-type-line-label);
	letter-spacing: var(--tds-type-track-label);
	text-transform: uppercase;
	color: var(--tds-brand-strong);
}

.uh-case-archive-card__action::after {
	content: " \2192";
}

@media (max-width: 767.98px) {
	.uh-case-archive-card__body {
		padding: var(--tds-space-03);
	}

	.uh-case-archive-card__title {
		font-size: var(--tds-type-size-ui);
	}
}

/* ==========================================================================
   1. Case Study Single: Page Shell
   ========================================================================== */

.uh-case-study,
.uh-case-study-page {
	background: #ffffff;
	color: var(--tds-text-main);
}

.uh-case-study__record-header {
	padding-top: 3rem;
	padding-bottom: 2rem;
	border-bottom: 1px solid var(--tds-border);
	background: #ffffff;
}

.uh-case-study__header-inner {
	max-width: 980px;
	margin-inline: auto;
}

.uh-case-study__backlink {
	display: inline-flex;
	align-items: center;
	gap: 0.35rem;
	margin-bottom: 0.75rem;
	font-family: var(--tds-font-system);
	font-size: var(--tds-type-size-meta);
	font-weight: var(--tds-weight-semibold);
	line-height: var(--tds-type-line-meta);
	color: var(--tds-brand-strong);
	text-decoration: none;
}

.uh-case-study__backlink::after {
	content: none;
}

.uh-case-study__backlink-icon {
	display: inline-block;
	line-height: 1;
	transform: translateY(-1px);
}

.uh-case-study__backlink:hover,
.uh-case-study__backlink:focus-visible {
	color: var(--tds-brand-dark);
	text-decoration: underline;
	text-underline-offset: 3px;
}

.uh-case-study__kicker,
.uh-case-study__eyebrow,
.uh-case-studies-kicker {
	display: block;
	margin: 0 0 1rem;
	font-family: var(--tds-font-system);
	font-size: var(--tds-type-size-label);
	font-weight: var(--tds-weight-medium);
	line-height: var(--tds-type-line-label);
	letter-spacing: var(--tds-type-track-label);
	text-transform: uppercase;
	color: var(--tds-text-muted);
}

.uh-case-study__title {
	max-width: 32ch;
	margin: 0 0 1rem;
	font-family: var(--tds-font-system);
	font-size: clamp(2rem, 3.4vw, 3rem);
	font-weight: var(--tds-weight-semibold);
	line-height: var(--tds-type-line-body);
	letter-spacing: var(--tds-type-track-body);
	color: var(--tds-text-main);
}

.uh-case-study__deck,
.uh-case-study__subtitle {
	max-width: 62ch;
	margin: 0;
	font-family: var(--tds-font-system);
	font-size: var(--tds-type-size-body);
	line-height: var(--tds-type-line-body);
	color: var(--tds-text-main);
}

/* ==========================================================================
   2. Main Record Layout
   ========================================================================== */

.uh-case-study__record-section {
	padding-top: var(--tds-space-05);
	padding-bottom: var(--tds-space-05);
}

.uh-case-study__layout {
	--uh-case-rail-top: calc(var(--uh-dynamic-combined-height, 72px) + 1.5rem);
	align-items: stretch;
}

.uh-case-study__main {
	max-width: 920px;
}


/* ==========================================================================
   3. Record Rail
   ========================================================================== */

.uh-case-study__rail-sticky {
	width: 100%;
	max-height: none;
	overflow: visible;
}

@media (min-width: 992px) {
	.uh-case-study__rail-sticky {
		position: sticky;
		top: var(--uh-case-rail-top);
		align-self: flex-start;
	}
}

.uh-case-study__rail {
	display: flex;
	flex-direction: column;
	gap: 1rem;
	width: 100%;
}

.uh-case-study__rail-card {
	padding: 1.15rem;
	border: 1px solid var(--tds-border);
	border-radius: var(--tds-radius-md);
	background: #ffffff;
}

.uh-case-study__rail-title {
	margin: 0 0 1rem;
	font-family: var(--tds-font-system);
	font-size: var(--tds-type-size-body);
	font-weight: var(--tds-weight-semibold);
	line-height: var(--tds-type-line-body);
	letter-spacing: var(--tds-type-track-body);
	color: var(--tds-text-main);
}

.uh-case-study__record-nav-list {
	display: flex;
	flex-direction: column;
	gap: 0.15rem;
	padding: 0;
	margin: 0;
	list-style: none;
}

.uh-case-study__record-nav-item {
	margin: 0;
}

.uh-case-study__record-nav-link {
	display: block;
	padding: 0.42rem 0.65rem 0.42rem 0.75rem;
	border-left: 2px solid transparent;
	border-radius: var(--tds-radius-sm);
	font-family: var(--tds-font-system);
	font-size: var(--tds-type-size-meta);
	font-weight: var(--tds-weight-medium);
	line-height: var(--tds-type-line-meta);
	color: var(--tds-text-muted);
	text-decoration: none;
}

.uh-case-study__record-nav-link:hover,
.uh-case-study__record-nav-link:focus-visible,
.uh-case-study__record-nav-link.is-active,
.uh-case-study__record-nav-link[aria-current="true"] {
	color: var(--tds-brand-strong);
	border-left-color: var(--tds-brand);
	background: rgba(227, 52, 14, 0.07);
	text-decoration: none;
}

.uh-case-study__record-list {
	margin: 0;
}

.uh-case-study__record-row {
	padding: 0.85rem 0;
	border-top: 1px solid var(--tds-border);
}

.uh-case-study__record-row:first-child {
	padding-top: 0;
	border-top: 0;
}

.uh-case-study__record-row:last-child {
	padding-bottom: 0;
}

.uh-case-study__record-term {
	margin: 0 0 0.25rem;
	color: var(--tds-text-muted);
}

.uh-case-study__record-desc,
.uh-case-study__record-value {
	margin: 0;
	color: var(--tds-text-main);
}

.uh-case-study__record-desc a,
.uh-case-study__record-value a {
	color: inherit;
	text-decoration: none;
}

.uh-case-study__record-desc a:hover,
.uh-case-study__record-desc a:focus-visible,
.uh-case-study__record-value a:hover,
.uh-case-study__record-value a:focus-visible {
	color: var(--tds-brand-strong);
	text-decoration: underline;
	text-underline-offset: 3px;
}

.uh-case-study__report-box {
	display: flex;
	flex-direction: column;
	gap: 0.35rem;
	padding-top: 1rem;
	margin-top: 1rem;
	border-top: 1px solid var(--tds-border);
}

.uh-case-study__report-link {
	display: inline-block;
	max-width: 30ch;
	font-family: var(--tds-font-system);
	font-size: var(--tds-type-size-meta);
	font-weight: var(--tds-weight-medium);
	line-height: var(--tds-type-line-meta);
	color: var(--tds-brand-strong);
	text-decoration: none;
}

.uh-case-study__report-link::after {
	content: none;
}

.uh-case-study__report-link:hover,
.uh-case-study__report-link:focus-visible {
	color: var(--tds-brand-dark);
	text-decoration: underline;
	text-underline-offset: 3px;
}
/* ==========================================================================
   4. Featured Figure
   ========================================================================== */

.uh-case-study__figure {
	max-width: 920px;
	margin: 0 0 var(--tds-space-04);
}

.uh-case-study__figure img {
	display: block;
	width: 100%;
	height: auto;
	border-radius: var(--tds-radius-md);
}

.uh-case-study__figcaption {
	max-width: 78ch;
	margin: 0.65rem 0 0;
	font-family: var(--tds-font-system);
	font-size: var(--tds-type-size-meta);
	line-height: var(--tds-type-line-meta);
	color: var(--tds-text-muted);
}

/* ==========================================================================
   5. Reading Well
   ========================================================================== */

.uh-case-study__reading-well p,
.uh-case-study__reading-well ul,
.uh-case-study__reading-well ol {
	margin-bottom: 1.5rem;
}

.uh-case-study__reading-well ul,
.uh-case-study__reading-well ol {
	padding-left: 1.25rem;
}

.uh-case-study__reading-well li + li {
	margin-top: 0.5rem;
}

.uh-case-study__reading-well h2,
.uh-case-study__section-title {
	margin-top: 3.5rem;
	margin-bottom: 1rem;
	font-family: var(--tds-font-system);
	font-size: var(--tds-type-h3);
	font-weight: var(--tds-weight-semibold);
	line-height: var(--tds-type-line-h2);
	letter-spacing: var(--tds-type-track-h2);
	color: var(--tds-text-main);
}

.uh-case-study__reading-well h3 {
	margin-top: 2.5rem;
	margin-bottom: 0.875rem;
	font-family: var(--tds-font-system);
	font-size: var(--tds-type-h3);
	font-weight: var(--tds-weight-semibold);
	line-height: var(--tds-type-line-h3);
	letter-spacing: var(--tds-type-track-h3);
	color: var(--tds-text-main);
}

.uh-case-study__reading-well h4 {
	margin-top: 2rem;
	margin-bottom: 0.75rem;
	font-family: var(--tds-font-system);
	font-size: var(--tds-type-h4);
	font-weight: var(--tds-weight-semibold);
	line-height: var(--tds-type-line-h4);
	color: var(--tds-text-main);
}

.uh-case-study__reading-well blockquote {
	margin: 2.5rem 0;
	padding: 1rem 0 1rem 1.25rem;
	border-left: 3px solid var(--tds-brand);
	color: var(--tds-text-muted);
	font-style: italic;
}

.uh-case-study__reading-well img {
	max-width: 100%;
	height: auto;
	border-radius: var(--tds-radius-md);
}

.uh-case-study__reading-well table {
	width: 100%;
	margin: 2rem 0;
	border-collapse: collapse;
	font-family: var(--tds-font-system);
	font-size: var(--tds-type-size-meta);
	line-height: var(--tds-type-line-meta);
}

.uh-case-study__reading-well th,
.uh-case-study__reading-well td {
	padding: 0.75rem 0.875rem;
	border: 1px solid var(--tds-border);
	vertical-align: top;
}

.uh-case-study__reading-well th {
	background: #f8fafc;
	font-weight: var(--tds-weight-semibold);
	color: var(--tds-text-main);
}

.uh-case-study__reading-well a:not(.btn) {
	color: var(--tds-brand-strong);
	text-decoration: underline;
	text-decoration-color: rgba(227, 52, 14, 0.25);
	text-underline-offset: 3px;
}

.uh-case-study__reading-well a:not(.btn):hover,
.uh-case-study__reading-well a:not(.btn):focus-visible {
	color: var(--tds-brand-dark);
	text-decoration-color: currentColor;
}

/* ==========================================================================
   6. Related Records
   ========================================================================== */

.uh-case-study__related-records {
	margin: var(--tds-space-05) 0;
	padding: var(--tds-space-03);
	border: 1px solid var(--tds-border);
	border-radius: var(--tds-radius-md);
	background: #ffffff;
}

.uh-case-study__related-header {
	margin-bottom: 1rem;
	padding-bottom: 1rem;
	border-bottom: 1px solid var(--tds-border);
}

.uh-case-study__related-kicker {
	margin: 0 0 0.35rem;
	font-family: var(--tds-font-system);
	font-size: var(--tds-type-size-label);
	font-weight: var(--tds-weight-medium);
	line-height: var(--tds-type-line-label);
	letter-spacing: var(--tds-type-track-label);
	text-transform: uppercase;
	color: var(--tds-text-muted);
}

.uh-case-study__related-heading {
	margin: 0;
	font-family: var(--tds-font-system);
	font-size: clamp(1.15rem, 1rem + 0.45vw, 1.35rem);
	font-weight: var(--tds-weight-semibold);
	line-height: var(--tds-type-line-body);
	letter-spacing: var(--tds-type-track-body);
	color: var(--tds-text-main);
}

.uh-case-study__related-items {
	display: flex;
	flex-direction: column;
	border-top: 1px solid var(--tds-border);
}

.uh-case-study__related-item {
	display: flex;
	gap: 1rem;
	align-items: flex-start;
	padding: 1rem 0;
	border-bottom: 1px solid var(--tds-border);
	color: inherit;
	text-decoration: none;
}

.uh-case-study__related-item:hover,
.uh-case-study__related-item:focus-visible {
	color: inherit;
	text-decoration: none;
}

.uh-case-study__related-media {
	flex: 0 0 72px;
	width: 72px;
	height: 54px;
	overflow: hidden;
	border-radius: var(--tds-radius-sm);
	background: #f8fafc;
}

.uh-case-study__related-media img {
	display: block;
	width: 100%;
	height: 100%;
	object-fit: cover;
}

.uh-case-study__related-content {
	display: block;
	min-width: 0;
}

.uh-case-study__related-title {
	display: block;
	margin: 0 0 0.25rem;
	font-family: var(--tds-font-system);
	font-size: var(--tds-type-size-body);
	font-weight: var(--tds-weight-semibold);
	line-height: var(--tds-type-line-body);
	color: var(--tds-text-main);
}

.uh-case-study__related-item:hover .uh-case-study__related-title,
.uh-case-study__related-item:focus-visible .uh-case-study__related-title {
	color: var(--tds-brand-strong);
	text-decoration: underline;
	text-underline-offset: 3px;
}

.uh-case-study__related-excerpt {
	display: block;
	font-family: var(--tds-font-system);
	font-size: var(--tds-type-size-meta);
	line-height: var(--tds-type-line-meta);
	color: var(--tds-text-muted);
}

.uh-case-study__related-footer {
	margin-top: 1rem;
}

.uh-case-study__related-action {
	display: inline-flex;
	align-items: center;
	min-height: var(--tds-tap-target-min);
	font-family: var(--tds-font-system);
	font-size: var(--tds-type-size-label);
	font-weight: var(--tds-weight-medium);
	line-height: var(--tds-type-line-label);
	letter-spacing: var(--tds-type-track-label);
	text-transform: uppercase;
	color: var(--tds-brand-strong);
	text-decoration: none;
}

.uh-case-study__related-action::after {
	content: " \2192";
}

.uh-case-study__related-action:hover,
.uh-case-study__related-action:focus-visible {
	color: var(--tds-brand-dark);
	text-decoration: underline;
	text-underline-offset: 3px;
}

/* ==========================================================================
   7. Record Footer CTA
   ========================================================================== */

.uh-case-study__next-step {
	margin-top: var(--tds-space-05);
	padding-top: var(--tds-space-04);
	border-top: 1px solid var(--tds-border);
}

.uh-case-study__next-step-panel {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: var(--tds-space-04);
	padding: var(--tds-space-04);
	border: 1px solid var(--tds-border);
	border-radius: var(--tds-radius-lg);
	background: #ffffff;
}

.uh-case-study__next-step-copy {
	max-width: 52ch;
}

.uh-case-study__next-step-title {
	margin: 0 0 0.75rem;
	font-family: var(--tds-font-system);
	font-size: clamp(1.5rem, 2.2vw, 2rem);
	font-weight: var(--tds-weight-semibold);
	line-height: var(--tds-type-line-body);
	letter-spacing: var(--tds-type-track-body);
	color: var(--tds-text-main);
}

.uh-case-study__next-step-text {
	margin: 0;
	font-family: var(--tds-font-system);
	font-size: var(--tds-type-size-body);
	line-height: var(--tds-type-line-body);
	color: var(--tds-text-muted);
}

.uh-case-study__next-step-actions {
	display: flex;
	flex-wrap: wrap;
	justify-content: flex-end;
	gap: 0.75rem;
}

/* ==========================================================================
   8. Legacy Compatibility
   Keep until all case-study singles use the updated record template.
   ========================================================================== */

.uh-case-study__preface {
	padding-bottom: 1.5rem;
	border-bottom: 1px solid var(--tds-border);
}

.uh-case-study__preface-summary {
	max-width: var(--tds-reading-measure);
	font-family: var(--tds-font-system);
	font-size: var(--tds-type-size-lead);
	line-height: var(--tds-type-line-lead);
	color: var(--tds-text-muted);
}

/* ==========================================================================
   Case Study Mobile TOC
   ========================================================================== */

.uh-case-study__mobile-nav {
	position: fixed;
	right: auto;
	bottom: max(1rem, env(safe-area-inset-bottom));
	left: 50%;
	z-index: 1000;
	width: min(calc(100vw - 2rem), 30rem);
	max-width: calc(100% - 2rem);
	padding: 0.85rem;
	border: 1px solid var(--tds-border);
	border-radius: 12px;
	background: #ffffff;
	box-shadow: 0 12px 40px rgba(15, 23, 42, 0.12);
	transform: translateX(-50%);
}

.uh-case-study__mobile-nav-label {
	display: block;
	margin: 0 0 0.45rem;
	font-family: var(--tds-font-system);
	font-size: var(--tds-type-size-ui);
	font-weight: var(--tds-weight-medium);
	line-height: var(--tds-type-line-label);
	color: var(--tds-text-main);
}

.uh-case-study__mobile-nav-select {
	min-height: var(--tds-tap-target-min);
	border: 0;
	border-radius: var(--tds-radius-sm);
	background-color: #f8fafc;
	font-family: var(--tds-font-system);
	font-size: var(--tds-type-size-meta);
	font-weight: var(--tds-weight-semibold);
	color: var(--tds-text-main);
}

.uh-case-study__mobile-nav-select.form-select {
	min-height: var(--tds-tap-target-min);
	border: 0;
	background-color: #f8fafc;
	font-family: var(--tds-font-system);
	font-size: var(--tds-type-size-meta);
	font-style: normal;
	font-weight: var(--tds-weight-semibold);
	line-height: var(--tds-type-line-meta);
	padding: 0.65rem 2.25rem 0.65rem 0.65rem;
	color: var(--tds-text-main);
	box-shadow: none;
}

@media (max-width: 390px) {
	.uh-case-study__mobile-nav-select.form-select {
		font-size: var(--tds-type-size-label);
	}
}

.uh-case-study__reading-well h2[id],
.uh-case-study__reading-well h3[id],
.uh-case-study__reading-well [id] {
	scroll-margin-top: calc(var(--uh-dynamic-combined-height, var(--tds-header-stack-h)) + var(--tds-space-md));
}

/* ==========================================================================
   9. Responsive
   ========================================================================== */

@media (max-width: 991.98px) {
	.uh-case-study-page,
	.uh-case-study {
		padding-bottom: 6rem;
	}

	.uh-case-study__record-header {
			--uh-case-record-header-gap: 2.5rem;

		padding-bottom: 1.75rem;
	}
	.uh-case-study__record-section {
		padding-top: var(--tds-space-04);
		padding-bottom: var(--tds-space-04);
	}

	.uh-case-study__title {
		font-size: clamp(1.85rem, 7vw, 2.5rem);
		letter-spacing: var(--tds-type-track-body);
	}

	.uh-case-study__rail-sticky {
		position: static;
		top: auto;
		max-height: none;
		overflow: visible;
	}

	.uh-case-study__rail {
		margin-bottom: var(--tds-space-04);
	}

	.uh-case-study__rail-card {
		padding: 1rem;
	}

	.uh-case-study__reading-well {
		margin-inline: auto;
	}

	.uh-case-study__figure {
		margin-inline: auto;
	}

	.uh-case-study__figcaption {
		margin-inline: auto;
	}
}

@media (max-width: 767.98px) {
	.uh-case-study__next-step-panel {
		display: block;
		padding: var(--tds-space-03);
	}

	.uh-case-study__next-step-actions {
		justify-content: flex-start;
		margin-top: var(--tds-space-03);
	}
}

@media (max-width: 575.98px) {

		.uh-case-study__record-header {
		--uh-case-record-header-gap: 2rem;

		padding-bottom: 1.5rem;
	}
	.uh-case-study__rail-card {
		padding: 0.95rem;
	}

	.uh-case-study__related-records {
		padding: 1rem;
	}

	.uh-case-study__related-item {
		gap: 0.75rem;
	}

	.uh-case-study__related-media {
		flex-basis: 56px;
		width: 56px;
		height: 42px;
	}

	.uh-case-study__figure {
		margin-bottom: var(--tds-space-04);
	}

	.uh-case-study__figcaption {
		font-size: var(--tds-type-size-label);
	}
}