/*
 * Base layout and components.
 *
 * Deliberately minimal: this is scaffolding that proves the plumbing works, not
 * the final design. Sections get their real styling as Figma pages land.
 */

*,
*::before,
*::after {
	box-sizing: border-box;
}

body {
	margin: 0;
	font-family: var(--font-body);
	font-size: var(--text-body);
	line-height: var(--lh-body);
	color: var(--color-text-primary);
	background: var(--color-bg-default);
	-webkit-font-smoothing: antialiased;
}

img,
svg,
video {
	max-width: 100%;
	height: auto;
}

a {
	color: var(--color-primary-hover);
}

h1,
h2,
h3,
h4 {
	font-family: var(--font-display);
	line-height: var(--lh-tight);
	margin: 0 0 var(--space-16);
	font-weight: 500;
	color: var(--color-text-heading);
}

/* --- Accessibility helpers ------------------------------------------------ */

.screen-reader-text {
	position: absolute;
	width: 1px;
	height: 1px;
	padding: 0;
	overflow: hidden;
	clip-path: inset(50%);
	white-space: nowrap;
	border: 0;
}

.skip-link {
	position: absolute;
	left: -9999px;
	z-index: 100;
	padding: var(--space-12) var(--space-16);
	background: var(--color-text-heading);
	color: var(--color-text-inverse);
}

.skip-link:focus {
	left: var(--space-16);
	top: var(--space-16);
}

:focus-visible {
	outline: 3px solid var(--color-primary);
	outline-offset: 2px;
}

/* --- Layout -------------------------------------------------------------- */

.container {
	width: 100%;
	max-width: var(--container-max);
	margin-inline: auto;
	padding-inline: var(--container-pad);
}

.prose {
	max-width: 72ch;
	padding-block: var(--space-48);
}

/* --- Site header --------------------------------------------------------- */

/* A floating pill over the hero gradient rather than a full-width bar. */
.site-header {
	position: sticky;
	top: 0;
	z-index: 50;
	padding-block: var(--space-16);
	background: transparent;
}

.site-header__inner {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: var(--space-32);
	min-height: 64px;
	padding: var(--space-8) var(--space-8) var(--space-8) var(--space-24);
	border-radius: var(--radius-full);
	background: rgb(255 255 255 / 62%);
	backdrop-filter: blur(14px);
}

@supports not (backdrop-filter: blur(14px)) {
	.site-header__inner {
		background: rgb(255 255 255 / 92%);
	}
}

.site-header__logo-mark {
	display: block;
	width: auto;
	height: 26px;
}

/* Inner pages have no gradient behind the header, so the pill needs a surface. */
body:not(.home) .site-header {
	background: var(--color-bg-default);
	border-bottom: 1px solid var(--color-border-default);
}

body:not(.home) .site-header__inner {
	background: transparent;
	backdrop-filter: none;
}

.site-header__title {
	font-family: var(--font-display);
	font-size: var(--text-subtitle);
	font-weight: 600;
	color: var(--color-text-heading);
	text-decoration: none;
}

.site-nav {
	display: flex;
	align-items: center;
	gap: var(--space-32);
}

.site-nav__list {
	display: flex;
	gap: var(--space-32);
	margin: 0;
	padding: 0;
	list-style: none;
}

.site-nav__list a {
	position: relative;
	display: inline-block;
	padding-block: var(--space-12);
	color: var(--color-text-primary);
	font-size: var(--text-body);
	text-decoration: none;
	transition: color var(--duration-hover) var(--ease-out-quart);
}

/* Underline draws in from the left rather than appearing all at once. */
.site-nav__list a::after {
	content: "";
	position: absolute;
	inset-inline: 0;
	bottom: var(--space-8);
	height: 2px;
	background: currentcolor;
	transform: scaleX(0);
	transform-origin: left;
	transition: transform var(--duration-hover) var(--ease-out-quart);
}

.site-nav__list a:hover,
.site-nav__list .current-menu-item > a {
	color: var(--color-primary);
}

.site-nav__list a:hover::after,
.site-nav__list .current-menu-item > a::after {
	transform: scaleX(1);
}

@media (prefers-reduced-motion: reduce) {
	.site-nav__list a,
	.site-nav__list a::after {
		transition: none;
	}
}

.site-header__toggle {
	display: none;
	padding: var(--space-8);
	border: 1px solid var(--color-border-default);
	border-radius: var(--radius-sm);
	background: none;
	cursor: pointer;
}

.site-header__toggle-bars,
.site-header__toggle-bars::before,
.site-header__toggle-bars::after {
	display: block;
	width: 22px;
	height: 2px;
	background: var(--color-text-heading);
}

.site-header__toggle-bars::before,
.site-header__toggle-bars::after {
	content: "";
	transform: translateY(-7px);
}

.site-header__toggle-bars::after {
	transform: translateY(5px);
}

@media (max-width: 860px) {
	.site-header__toggle {
		display: block;
		min-width: 44px;
		min-height: 44px;
	}

	.site-nav {
		display: none;
		position: absolute;
		inset: 64px 0 auto;
		flex-direction: column;
		align-items: stretch;
		gap: var(--space-16);
		padding: var(--space-24);
		background: var(--color-bg-default);
		border-bottom: 1px solid var(--color-border-default);
		box-shadow: var(--shadow-card);
	}

	.site-nav.is-open {
		display: flex;
	}

	.site-nav__list {
		flex-direction: column;
	}
}

/* --- Hero ---------------------------------------------------------------- */

.hero {
	padding-block: var(--space-64);
	background: var(--color-bg-warm);
}

.hero__inner {
	display: grid;
	gap: var(--space-48);
	align-items: center;
}

@media (min-width: 861px) {
	.hero__inner {
		grid-template-columns: 1fr 1fr;
	}
}

.hero__eyebrow {
	margin: 0 0 var(--space-12);
	font-size: var(--text-caption);
	font-weight: 700;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	color: var(--color-primary-hover);
}

.hero__title {
	font-size: var(--text-h1-fluid);
}

.hero__lead {
	margin: 0 0 var(--space-32);
	font-size: var(--text-subtitle);
	color: var(--color-text-muted);
}

/* --- Cards --------------------------------------------------------------- */

.card-grid {
	display: grid;
	gap: var(--space-32);
	grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
	padding-block: var(--space-48);
}

.card__media img {
	border-radius: var(--radius-sm);
}

.card__title {
	font-size: var(--text-h6);
	margin-block: var(--space-16) var(--space-8);
}

.card__title a {
	color: var(--color-text-heading);
	text-decoration: none;
}

.card__excerpt {
	margin: 0;
	color: var(--color-text-muted);
	font-size: var(--text-body-sm);
}

/* --- Footer -------------------------------------------------------------- */

.site-footer {
	padding-block: var(--space-64);
	background: var(--color-text-heading);
	color: var(--color-text-inverse);
}

.site-footer__list a {
	transition: color var(--duration-hover) ease;
}

.site-footer__list a:hover {
	color: var(--color-primary-bright);
	text-decoration: underline;
}

.site-footer__inner {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	justify-content: space-between;
	gap: var(--space-24);
}

.site-footer__copy {
	margin: 0;
	font-size: var(--text-body-sm);
	color: rgb(255 255 255 / 70%);
}

.site-footer__list {
	display: flex;
	flex-wrap: wrap;
	gap: var(--space-24);
	margin: 0;
	padding: 0;
	list-style: none;
}

.site-footer__list a {
	color: var(--color-text-inverse);
	font-size: var(--text-body-sm);
	text-decoration: none;
}

/* The menu and the social links sit on one line, so the nav is the flex row
   and each list keeps its own spacing inside it. */
.site-footer__nav {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: var(--space-32);
}

.site-footer__social {
	display: flex;
	gap: var(--space-16);
	margin: 0;
	padding: 0;
	list-style: none;
}

.site-footer__social a {
	display: block;
	color: rgb(255 255 255 / 70%);
	transition: color var(--duration-hover) ease;
}

.site-footer__social a:hover {
	color: var(--color-text-inverse);
}

.site-footer__icon {
	display: block;
	width: 20px;
	height: 20px;
}

/* --- Resources listing ---------------------------------------------------- */

/* Page header: heading and signup on the left, featured artwork on the right. */

.archive-hero {
	display: grid;
	gap: var(--space-48);
	align-items: center;
	padding-block: var(--space-64) var(--space-64);
	border-bottom: 1px solid var(--color-border-default);
}

@media (min-width: 981px) {
	.archive-hero {
		grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
		gap: var(--space-64);
	}
}

.archive-hero__eyebrow {
	margin: 0 0 var(--space-16);
	font-size: var(--text-body-sm);
	color: var(--color-text-muted);
}

.archive-hero__title {
	margin: 0 0 var(--space-24);
	font-size: var(--text-h1-fluid);
	max-width: 14ch;
}

.archive-hero__intro {
	margin: 0 0 var(--space-32);
	max-width: 46ch;
	color: var(--color-text-muted);
}

.archive-hero__media img {
	width: 100%;
	aspect-ratio: 16 / 10;
	object-fit: cover;
	border-radius: var(--radius-lg);
}

/* Signup block. Rendered only once a form embed exists, so this is width for
   whatever the newsletter provider drops in rather than styling of its fields. */

.signup {
	max-width: 470px;
}

/* Body: vertical filter column beside the grid. */

.archive-body {
	display: grid;
	gap: var(--space-32);
	padding-block: var(--space-48) var(--space-64);
}

@media (min-width: 981px) {
	.archive-body {
		grid-template-columns: 200px minmax(0, 1fr);
		gap: var(--space-48);
	}
}

.filter__list {
	display: flex;
	flex-wrap: wrap;
	gap: var(--space-4);
	margin: 0;
	padding: 0;
	list-style: none;
}

@media (min-width: 981px) {
	.filter {
		position: sticky;
		top: var(--space-32);
	}

	.filter__list {
		flex-direction: column;
		flex-wrap: nowrap;
	}
}

.filter__link {
	display: block;
	padding: var(--space-8) var(--space-16);
	border-left: 2px solid transparent;
	font-size: var(--text-body);
	color: var(--color-text-muted);
	text-decoration: none;
	transition: color var(--transition), border-color var(--transition);
}

.filter__link:hover {
	color: var(--color-text-primary);
}

.filter__link.is-active {
	border-left-color: var(--color-text-heading);
	color: var(--color-text-primary);
	font-weight: 600;
}

/* Grid of cards, artwork on top. */

.resource-grid {
	display: grid;
	gap: var(--space-42) var(--space-32);
	grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

/* Dim the grid while a filtered set is being fetched, so the swap reads as a
   deliberate change rather than a flicker. */
.archive-main {
	transition: opacity var(--transition);
}

.archive-main[aria-busy="true"] {
	opacity: 0.45;
}

.resource-card {
	display: flex;
	flex-direction: column;
	gap: var(--space-16);
}

.resource-card__media {
	display: block;
}

.resource-card__media img,
.resource-card__placeholder {
	display: block;
	width: 100%;
	aspect-ratio: 16 / 10;
	object-fit: cover;
	border-radius: var(--radius-lg);
	background: var(--color-bg-warm);
}

.resource-card__meta {
	display: flex;
	align-items: center;
	gap: var(--space-8);
	margin: 0;
	font-size: var(--text-body-sm);
	color: var(--color-text-muted);
}

.resource-card__title {
	font-size: var(--text-subtitle);
	margin: 0;
	line-height: 1.3;
}

.resource-card__title a {
	color: var(--color-text-heading);
	text-decoration: none;
}

.resource-card__title a:hover {
	color: var(--color-primary-hover);
}

.resource-card__cat {
	align-self: flex-start;
	font-size: var(--text-caption);
	font-weight: 700;
	letter-spacing: 0.06em;
	text-transform: uppercase;
	color: var(--color-primary-hover);
	text-decoration: none;
}

.archive-header {
	padding-block: var(--space-64) var(--space-16);
}

.archive-header__title {
	font-size: var(--text-h1-fluid);
	margin: 0;
}

.archive-header__desc {
	max-width: 60ch;
	color: var(--color-text-muted);
}

/* --- Single article ------------------------------------------------------- */

.article__header {
	padding-block: var(--space-64) var(--space-32);
}

.article__title {
	font-size: var(--text-h1-fluid);
	max-width: 20ch;
	margin: 0;
}

/* Hero image with the meta rail beside it, as on the reference. */
.article__top {
	display: grid;
	gap: var(--space-32);
	margin-bottom: var(--space-64);
}

@media (min-width: 981px) {
	.article__top {
		grid-template-columns: minmax(0, 1fr) 300px;
		align-items: start;
	}
}

.article__hero {
	margin: 0;
}

.article__hero img {
	width: 100%;
	border-radius: var(--radius-lg);
}

.chip {
	display: inline-block;
	padding: var(--space-4) var(--space-12);
	border: 1px solid var(--color-border-default);
	border-radius: var(--radius-sm);
	font-size: var(--text-caption);
	font-weight: 700;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	color: var(--color-text-muted);
	text-decoration: none;
}

.article__standfirst {
	margin: var(--space-24) 0 var(--space-32);
	font-size: var(--text-body-sm);
	line-height: 1.55;
	color: var(--color-text-muted);
}

.byline__label {
	margin: 0 0 var(--space-12);
	font-size: var(--text-caption);
	font-weight: 700;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	color: var(--color-text-muted);
}

.byline__person {
	display: flex;
	align-items: center;
	gap: var(--space-12);
}

.byline__avatar {
	border-radius: 50%;
}

.byline__name {
	margin: 0;
	font-size: var(--text-body-sm);
	font-weight: 600;
}

.byline__role,
.byline__meta {
	margin: 0;
	font-size: var(--text-caption);
	color: var(--color-text-muted);
}

.byline__meta {
	display: flex;
	gap: var(--space-12);
	margin-top: var(--space-16);
}

.article__layout {
	display: grid;
	gap: var(--space-48);
	align-items: start;
}

@media (min-width: 981px) {
	.article__layout {
		grid-template-columns: 240px minmax(0, 1fr);
	}
}

.article__body {
	padding-block: 0 var(--space-64);
	max-width: 72ch;
	/* Drives the 01 / 02 / 03 numbering on section headings. */
	counter-reset: geox-section;
}

.article__body h2 {
	margin-top: var(--space-48);
	font-size: var(--text-h4);
	/* Keep anchor jumps from parking headings under the sticky admin bar. */
	scroll-margin-top: var(--space-32);
}

/* Numbered like the contents list, without the author typing the numbers. */
.article__body h2::before {
	counter-increment: geox-section;
	content: counter(geox-section, decimal-leading-zero);
	display: block;
	margin-bottom: var(--space-8);
	font-size: var(--text-body-sm);
	font-weight: 700;
	color: var(--color-primary-hover);
}

.article__body h3 {
	margin-top: var(--space-32);
	font-size: var(--text-h6);
	scroll-margin-top: var(--space-32);
}

.article__body img {
	border-radius: var(--radius-sm);
}

/* Table of contents */

.toc {
	position: sticky;
	top: var(--space-32);
	padding-left: var(--space-16);
	border-left: 2px solid var(--color-border-default);
}

@media (max-width: 980px) {
	.toc {
		position: static;
		padding: var(--space-24);
		border-left: 0;
		border-radius: var(--radius-sm);
		background: var(--color-bg-warm);
	}
}

.toc__list {
	margin: 0;
	padding: 0;
	list-style: none;
	display: flex;
	flex-direction: column;
	gap: var(--space-16);
}

.toc__item--h3 {
	padding-left: var(--space-32);
}

.toc__list a {
	display: grid;
	grid-template-columns: auto minmax(0, 1fr);
	gap: var(--space-12);
	color: var(--color-text-muted);
	font-size: var(--text-body-sm);
	text-decoration: none;
	line-height: 1.35;
}

/* Sub-entries have no number, so their text lines up with the text above. */
.toc__item--h3 a {
	grid-template-columns: minmax(0, 1fr);
}

.toc__num {
	font-size: var(--text-caption);
	font-weight: 700;
	font-variant-numeric: tabular-nums;
	color: var(--color-primary-hover);
}

.toc__list a:hover,
.toc__list a.is-current {
	color: var(--color-primary-hover);
	font-weight: 600;
}

/* In-article CTA */

.cta-block {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	justify-content: space-between;
	gap: var(--space-24);
	margin-block: var(--space-48);
	padding: var(--space-32);
	border-radius: var(--radius-lg);
	background: var(--color-text-heading);
	color: var(--color-text-inverse);
}

.cta-block__title {
	margin: 0;
	font-size: var(--text-h6);
	font-weight: 600;
}

.cta-block__text {
	margin: var(--space-8) 0 0;
	font-size: var(--text-body-sm);
	color: rgb(255 255 255 / 75%);
}

/* Related + closing CTA */

.related {
	padding-block: var(--space-48);
	border-top: 1px solid var(--color-border-default);
}

.related__title {
	font-size: var(--text-h4);
}

.related__grid {
	display: grid;
	gap: var(--space-24);
	grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
}

/* Related uses the same card, so it needs no overrides beyond its own grid. */

.closing-cta {
	padding-block: var(--space-64);
	background: var(--color-bg-warm);
}

.closing-cta__inner {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	justify-content: space-between;
	gap: var(--space-24);
}

.closing-cta__title {
	margin: 0;
	font-size: var(--text-h4);
	font-weight: 600;
}