/**
 * Base stylesheet
 *
 * The stable foundation for this site: reset, typography, layout primitives
 * and default components. Everything is driven by the custom properties
 * (design tokens) below, which main.css overrides to give the site its look.
 *
 * Prefer changing tokens and adding components in main.css over editing
 * this file, so the foundation stays predictable.
 *
 * Contents:
 * 1. Tokens (defaults)
 * 2. Reset
 * 3. Typography
 * 4. Layout primitives: .container .stack .cluster .grid .card-grid
 * 5. Site structure: header, nav, breadcrumbs, page header, footer
 * 6. Content: .prose
 * 7. Components: .card .button .subnav .page-image .image-placeholder
 * 8. Utilities: .skip-link .visually-hidden
 *
 */

/* 1. Tokens (defaults) ------------------------------------------------------ */

:root {
	/* Colors */
	--color-bg: #ffffff;
	--color-surface: #f5f5f4;
	--color-text: #1c1917;
	--color-muted: #57534e;
	--color-border: #e7e5e4;
	--color-accent: #2563eb;
	--color-accent-contrast: #ffffff;
	--color-focus: #2563eb;

	/* Fonts */
	--font-body: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
	--font-heading: var(--font-body);
	--font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

	/* Type scale */
	--text-sm: 0.875rem;
	--text-base: 1rem;
	--text-lg: 1.25rem;
	--text-xl: 1.5rem;
	--text-2xl: clamp(1.75rem, 1.4rem + 1.5vw, 2.25rem);
	--text-3xl: clamp(2.125rem, 1.6rem + 2.5vw, 3rem);
	--leading-body: 1.6;
	--leading-heading: 1.2;
	--weight-heading: 700;

	/* Spacing scale */
	--space-2xs: 0.25rem;
	--space-xs: 0.5rem;
	--space-sm: 0.75rem;
	--space-md: 1rem;
	--space-lg: 1.5rem;
	--space-xl: 2.5rem;
	--space-2xl: 4rem;

	/* Shape and layout */
	--radius: 6px;
	--border-width: 1px;
	--container-max: 72rem;
	--measure: 68ch;
	--gutter: clamp(1rem, 4vw, 2rem);
}

/* 2. Reset ------------------------------------------------------------------ */

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

body, h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd, ul, ol {
	margin: 0;
}

ul[role="list"], ol[role="list"] {
	list-style: none;
	padding: 0;
}

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

input, button, textarea, select {
	font: inherit;
}

@media (prefers-reduced-motion: reduce) {
	*, *::before, *::after {
		animation-duration: 0.01ms !important;
		transition-duration: 0.01ms !important;
		scroll-behavior: auto !important;
	}
}

/* 3. Typography ------------------------------------------------------------- */

html {
	-webkit-text-size-adjust: 100%;
	text-size-adjust: 100%;
}

body {
	min-height: 100vh;
	display: flex;
	flex-direction: column;
	background: var(--color-bg);
	color: var(--color-text);
	font-family: var(--font-body);
	font-size: var(--text-base);
	line-height: var(--leading-body);
}

h1, h2, h3, h4, h5, h6 {
	font-family: var(--font-heading);
	font-weight: var(--weight-heading);
	line-height: var(--leading-heading);
	text-wrap: balance;
}

h1 { font-size: var(--text-3xl); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }

a {
	color: var(--color-accent);
	text-underline-offset: 0.15em;
}

a:hover {
	text-decoration-thickness: 2px;
}

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

/* 4. Layout primitives ------------------------------------------------------ */

/* Centered, padded content column */
.container {
	width: 100%;
	max-width: var(--container-max);
	margin-inline: auto;
	padding-inline: var(--gutter);
}

/* Vertical rhythm between direct children */
.stack > * + * {
	margin-block-start: var(--stack-space, var(--space-lg));
}

/* Horizontal group that wraps */
.cluster {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: var(--cluster-space, var(--space-md));
}

/* Responsive grid of equal columns */
.grid, .card-grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(min(100%, var(--grid-min, 16rem)), 1fr));
	gap: var(--grid-space, var(--space-lg));
}

/* 5. Site structure --------------------------------------------------------- */

.site-header {
	border-bottom: var(--border-width) solid var(--color-border);
}

.site-header-inner {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	justify-content: space-between;
	gap: var(--space-sm) var(--space-lg);
	padding-block: var(--space-md);
}

.site-brand {
	font-family: var(--font-heading);
	font-weight: var(--weight-heading);
	font-size: var(--text-lg);
	color: var(--color-text);
	text-decoration: none;
}

.site-nav ul {
	display: flex;
	flex-wrap: wrap;
	gap: var(--space-xs) var(--space-md);
}

.site-nav a {
	color: var(--color-muted);
	text-decoration: none;
}

.site-nav a:hover,
.site-nav a[aria-current="page"],
.site-nav a.is-active {
	color: var(--color-text);
	text-decoration: underline;
}

.site-main {
	flex: 1;
	padding-block: var(--space-xl) var(--space-2xl);
}

.breadcrumbs ol {
	display: flex;
	flex-wrap: wrap;
	gap: var(--space-2xs);
	font-size: var(--text-sm);
	color: var(--color-muted);
}

.breadcrumbs li + li::before {
	content: "/";
	margin-inline-end: var(--space-2xs);
}

.breadcrumbs a {
	color: inherit;
}

.page-header > * + * {
	margin-block-start: var(--space-sm);
}

.page-summary {
	max-width: var(--measure);
	font-size: var(--text-lg);
	color: var(--color-muted);
}

.site-footer {
	border-top: var(--border-width) solid var(--color-border);
	font-size: var(--text-sm);
	color: var(--color-muted);
}

.site-footer-inner {
	display: flex;
	flex-wrap: wrap;
	justify-content: space-between;
	gap: var(--space-sm) var(--space-lg);
	padding-block: var(--space-lg);
}

.site-footer a {
	color: inherit;
}

/* 6. Content ---------------------------------------------------------------- */

/* Rich text output, such as the TinyMCE body field */
.prose {
	max-width: var(--measure);
}

.prose > * + * {
	margin-block-start: var(--space-md);
}

.prose > :is(h2, h3, h4) {
	margin-block-start: var(--space-xl);
}

.prose :is(ul, ol) {
	padding-inline-start: var(--space-lg);
}

.prose li + li {
	margin-block-start: var(--space-2xs);
}

.prose blockquote {
	padding-inline-start: var(--space-md);
	border-inline-start: 4px solid var(--color-border);
	color: var(--color-muted);
}

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

.prose hr {
	border: 0;
	border-top: var(--border-width) solid var(--color-border);
	margin-block: var(--space-xl);
}

.prose table {
	width: 100%;
	border-collapse: collapse;
	font-size: var(--text-sm);
}

.prose :is(th, td) {
	padding: var(--space-xs) var(--space-sm);
	border-bottom: var(--border-width) solid var(--color-border);
	text-align: start;
}

.prose :is(code, pre) {
	font-family: var(--font-mono);
	font-size: 0.9em;
}

.prose pre {
	overflow-x: auto;
	padding: var(--space-md);
	background: var(--color-surface);
	border-radius: var(--radius);
}

/* 7. Components ------------------------------------------------------------- */

.card {
	padding: var(--space-lg);
	background: var(--color-surface);
	border: var(--border-width) solid var(--color-border);
	border-radius: var(--radius);
}

.card > * + * {
	margin-block-start: var(--space-xs);
}

.card-title {
	font-size: var(--text-lg);
}

.card-title a {
	color: var(--color-text);
	text-decoration: none;
}

.card-title a:hover {
	text-decoration: underline;
}

.button {
	display: inline-flex;
	align-items: center;
	gap: var(--space-xs);
	padding: var(--space-xs) var(--space-md);
	background: var(--color-accent);
	color: var(--color-accent-contrast);
	border: 0;
	border-radius: var(--radius);
	font-weight: 600;
	text-decoration: none;
	cursor: pointer;
}

.button:hover {
	filter: brightness(1.1);
}

.subnav ul {
	display: flex;
	flex-wrap: wrap;
	gap: var(--space-xs) var(--space-md);
}

.page-image {
	--placeholder-ratio: 16 / 9;
}

.page-image img {
	width: 100%;
	border-radius: var(--radius);
}

/* Placeholder shown where an image field is empty (see siteImage() in _func.php) */
.image-placeholder {
	position: relative;
	display: grid;
	place-items: center;
	aspect-ratio: var(--placeholder-ratio, 3 / 2);
	margin: 0;
	overflow: hidden;
	border-radius: var(--radius);
	background: var(--color-surface);
}

.image-placeholder::before {
	content: "";
	position: absolute;
	inset: -15%;
	background:
		radial-gradient(circle at 28% 38%, color-mix(in srgb, var(--color-accent) 45%, transparent) 0 16%, transparent 42%),
		radial-gradient(circle at 72% 62%, color-mix(in srgb, var(--color-muted) 45%, transparent) 0 20%, transparent 50%),
		linear-gradient(135deg, var(--color-surface), var(--color-border));
	filter: blur(28px);
}

.image-placeholder-label {
	position: relative;
	padding: var(--space-2xs) var(--space-sm);
	font-size: var(--text-sm);
	color: var(--color-text);
	background: color-mix(in srgb, var(--color-bg) 75%, transparent);
	border-radius: var(--radius);
}

/* 8. Utilities -------------------------------------------------------------- */

.skip-link {
	position: absolute;
	inset-inline-start: var(--space-md);
	top: -100px;
	z-index: 100;
	padding: var(--space-xs) var(--space-md);
	background: var(--color-accent);
	color: var(--color-accent-contrast);
	border-radius: var(--radius);
}

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

.visually-hidden {
	position: absolute !important;
	width: 1px;
	height: 1px;
	padding: 0;
	margin: -1px;
	overflow: hidden;
	clip: rect(0, 0, 0, 0);
	white-space: nowrap;
	border: 0;
}