/*
 * Shared stylesheet for the App::Actions, App::FileSync, App::Test::Generator
 * and Database::BI static sites.
 *
 * One file, no imports, no web fonts, no CDN: the sites are copied straight
 * into an Apache document root and served from disc.  The four copies are
 * byte-identical on purpose, so a change here belongs in all four at once.
 *
 * Desktop is the primary target.  Everything is fluid and there are two
 * breakpoints for phones and small tablets; the navigation becomes a single
 * horizontally scrolling row so the sticky header stays short.
 *
 * Several class names are historical aliases kept so older pages keep
 * rendering unchanged: .skip-link, .grid, .lede, .callout, .badges, .inner.
 */

:root {
	--bg: #fbfaf7;
	--surface: #ffffff;
	--ink: #1b2026;
	--muted: #5c6673;
	--line: #e3e0d8;
	--line-strong: #cfcabf;
	--accent: #14664a;
	--accent-soft: #e7f2ec;
	--accent-2: #1f5d9c;
	--warn: #8a5a06;
	--warn-soft: #fdf3dc;
	--code-bg: #ecebe5;
	--code-ink: #23282f;
	--term-bg: #16202a;
	--term-ink: #e9eef3;
	--radius: 10px;
	--shadow: 0 1px 2px rgba(20, 25, 30, 0.05);
	--header-h: 4.5rem;
	--measure: 62rem;
	--sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
	--mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}

@media (prefers-color-scheme: dark) {
	:root {
		--bg: #12161b;
		--surface: #191f26;
		--ink: #e6eaef;
		--muted: #a3aebb;
		--line: #2b343e;
		--line-strong: #3a4552;
		--accent: #6fd0a8;
		--accent-soft: #17332a;
		--accent-2: #82b6ea;
		--warn: #e5b567;
		--warn-soft: #33290f;
		--code-bg: #232b34;
		--code-ink: #e6eaef;
		--term-bg: #0d1319;
		--term-ink: #e9eef3;
		--shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
	}
}

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

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

body {
	margin: 0;
	background: var(--bg);
	color: var(--ink);
	font-family: var(--sans);
	font-size: 17px;
	line-height: 1.65;
	text-rendering: optimizeLegibility;
	overflow-wrap: break-word;
}

/* Single content column.  .inner is the Database::BI spelling of .wrap. */

.wrap,
.inner {
	width: 100%;
	max-width: var(--measure);
	margin: 0 auto;
	/* Inline only: a `padding` shorthand here would out-specify the block
	   padding on main and on .header-inner, which are type/class siblings. */
	padding-inline: 1.25rem;
}

/* Skip link */

.skip,
.skip-link {
	position: absolute;
	left: -9999px;
	top: 0;
	background: var(--surface);
	color: var(--ink);
	padding: 0.5rem 0.75rem;
	border: 1px solid var(--line-strong);
	border-radius: 0 0 var(--radius) 0;
	z-index: 20;
}

.skip:focus,
.skip-link:focus {
	left: 0;
	outline: 2px solid var(--accent-2);
	outline-offset: -2px;
}

a {
	color: var(--accent-2);
	text-decoration-thickness: 1px;
	text-underline-offset: 2px;
}

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

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

/* Header and navigation */

.site-header {
	background: var(--surface);
	background: color-mix(in srgb, var(--surface) 94%, transparent);
	border-bottom: 1px solid var(--line);
	position: sticky;
	top: 0;
	z-index: 10;
	backdrop-filter: saturate(180%) blur(8px);
}

.header-inner {
	display: flex;
	flex-wrap: wrap;
	align-items: baseline;
	gap: 0.4rem 1.5rem;
	padding-top: 0.8rem;
	padding-bottom: 0.7rem;
}

.brand {
	display: flex;
	flex-direction: column;
	text-decoration: none;
	color: var(--ink);
	line-height: 1.2;
}

.brand-name {
	font-weight: 700;
	font-size: 1.05rem;
	letter-spacing: -0.01em;
	font-family: var(--mono);
}

.brand:hover .brand-name {
	color: var(--accent);
}

.brand-tag {
	font-size: 0.78rem;
	color: var(--muted);
	letter-spacing: 0.01em;
}

.site-nav {
	display: flex;
	flex-wrap: wrap;
	gap: 0.15rem 1rem;
	font-size: 0.92rem;
	margin-left: auto;
}

.site-nav a {
	color: var(--muted);
	text-decoration: none;
	padding: 0.15rem 0;
	border-bottom: 2px solid transparent;
}

.site-nav a:hover {
	color: var(--ink);
	border-bottom-color: var(--line-strong);
}

.site-nav a.current,
.site-nav a[aria-current="page"] {
	color: var(--accent);
	border-bottom-color: var(--accent);
	font-weight: 600;
}

/* Page content */

main {
	padding-top: 2.25rem;
	padding-bottom: 4rem;
}

/* Anchors land below the sticky header rather than under it. */

main [id] {
	scroll-margin-top: calc(var(--header-h) + 0.5rem);
}

h1 {
	font-size: clamp(1.8rem, 4.2vw, 2.4rem);
	line-height: 1.15;
	letter-spacing: -0.02em;
	margin: 0 0 0.6rem;
}

h2 {
	font-size: 1.32rem;
	line-height: 1.25;
	letter-spacing: -0.01em;
	margin: 2.6rem 0 0.75rem;
	padding-top: 0.45rem;
	border-top: 1px solid var(--line);
}

h3 {
	font-size: 1.06rem;
	margin: 1.8rem 0 0.4rem;
}

h4 {
	font-size: 0.95rem;
	margin: 1.4rem 0 0.3rem;
	color: var(--muted);
	text-transform: uppercase;
	letter-spacing: 0.06em;
}

p,
ul,
ol,
dl {
	margin: 0 0 1rem;
}

ul,
ol {
	padding-left: 1.35rem;
}

li {
	margin-bottom: 0.35rem;
}

li > ul,
li > ol {
	margin-top: 0.4rem;
	margin-bottom: 0.6rem;
}

hr {
	border: 0;
	border-top: 1px solid var(--line);
	margin: 2.5rem 0;
}

.lead,
.lede {
	font-size: 1.12rem;
	color: var(--muted);
	max-width: 48rem;
	margin-bottom: 1.4rem;
}

.section-intro {
	color: var(--muted);
	max-width: 48rem;
	margin-bottom: 1.5rem;
}

.muted {
	color: var(--muted);
}

.small {
	font-size: 0.9rem;
}

.nowrap {
	white-space: nowrap;
}

/* Hero */

.hero {
	padding: 0.5rem 0 1.2rem;
}

.eyebrow {
	text-transform: uppercase;
	letter-spacing: 0.08em;
	font-size: 0.75rem;
	font-weight: 700;
	color: var(--accent);
	margin: 0 0 0.6rem;
}

/* Headline facts, as chips.  .badges is the App::FileSync spelling. */

.facts,
.badges {
	display: flex;
	flex-wrap: wrap;
	gap: 0.4rem;
	list-style: none;
	padding: 0;
	margin: 0 0 1.6rem;
}

.facts li,
.badges li {
	margin: 0;
	font-size: 0.78rem;
	letter-spacing: 0.02em;
	color: var(--muted);
	background: var(--surface);
	border: 1px solid var(--line-strong);
	border-radius: 999px;
	padding: 0.1rem 0.65rem;
	white-space: nowrap;
}

/* Code */

code,
kbd,
samp,
pre {
	font-family: var(--mono);
}

code,
kbd,
samp {
	font-size: 0.9em;
}

:not(pre) > code {
	background: var(--code-bg);
	color: var(--code-ink);
	padding: 0.1em 0.35em;
	border-radius: 4px;
	border: 1px solid var(--line);
	overflow-wrap: break-word;
}

pre {
	background: var(--term-bg);
	color: var(--term-ink);
	padding: 0.9rem 1.05rem;
	border-radius: var(--radius);
	overflow-x: auto;
	font-size: 0.85rem;
	line-height: 1.55;
	margin: 0 0 1.25rem;
	tab-size: 4;
	-webkit-overflow-scrolling: touch;
}

pre code {
	background: none;
	border: 0;
	padding: 0;
	color: inherit;
	font-size: inherit;
	white-space: pre;
}

pre .comment {
	color: #93a4b4;
}

pre.diagram {
	font-size: 0.8rem;
	line-height: 1.5;
}

.caption {
	font-size: 0.82rem;
	color: var(--muted);
	margin: -0.9rem 0 1.4rem;
}

/* Cards.  .grid is the App::FileSync and Database::BI spelling. */

.cards,
.grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
	gap: 1rem;
	margin: 1.5rem 0 2rem;
	padding: 0;
	list-style: none;
}

.card {
	background: var(--surface);
	border: 1px solid var(--line);
	border-radius: var(--radius);
	padding: 1rem 1.1rem;
	margin: 0;
	box-shadow: var(--shadow);
}

.card h3 {
	margin: 0 0 0.35rem;
	font-size: 1rem;
}

.card h3 a {
	text-decoration: none;
}

.card p {
	margin: 0;
	font-size: 0.92rem;
	color: var(--muted);
}

.card p + p {
	margin-top: 0.5rem;
}

.card .tag {
	display: inline-block;
	font-size: 0.72rem;
	text-transform: uppercase;
	letter-spacing: 0.06em;
	color: var(--accent);
	background: var(--accent-soft);
	border-radius: 4px;
	padding: 0.05rem 0.4rem;
	margin-bottom: 0.5rem;
}

/* Callouts.  .callout is the App::FileSync spelling. */

.note,
.warn,
.callout {
	border-left: 4px solid var(--accent);
	background: var(--accent-soft);
	border-radius: 0 var(--radius) var(--radius) 0;
	padding: 0.85rem 1rem;
	margin: 1.25rem 0;
	font-size: 0.95rem;
}

.warn,
.callout.warn {
	border-left-color: var(--warn);
	background: var(--warn-soft);
	color: var(--warn);
}

.callout.warn a {
	color: inherit;
}

.note p:last-child,
.warn p:last-child,
.callout p:last-child,
.note pre:last-child,
.warn pre:last-child {
	margin-bottom: 0;
}

.note-title,
.warn-title {
	display: block;
	font-weight: 700;
	font-size: 0.78rem;
	letter-spacing: 0.06em;
	text-transform: uppercase;
	margin-bottom: 0.25rem;
}

.note-title {
	color: var(--accent);
}

.warn-title {
	color: var(--warn);
}

/* Tables */

.table-wrap {
	overflow-x: auto;
	margin: 1.25rem 0 1.75rem;
	border: 1px solid var(--line);
	border-radius: var(--radius);
	background: var(--surface);
	-webkit-overflow-scrolling: touch;
}

table {
	width: 100%;
	border-collapse: collapse;
	font-size: 0.9rem;
}

caption {
	caption-side: top;
	text-align: left;
	color: var(--muted);
	font-size: 0.85rem;
	padding-bottom: 0.4rem;
}

th,
td {
	text-align: left;
	padding: 0.55rem 0.85rem;
	border-bottom: 1px solid var(--line);
	vertical-align: top;
}

th {
	font-size: 0.76rem;
	text-transform: uppercase;
	letter-spacing: 0.06em;
	color: var(--muted);
	background: var(--bg);
	background: color-mix(in srgb, var(--bg) 60%, var(--surface));
	white-space: nowrap;
}

tbody tr:last-child th,
tbody tr:last-child td {
	border-bottom: 0;
}

td code,
th code {
	white-space: nowrap;
}

/* Command blocks */

.cmd {
	display: flex;
	flex-wrap: wrap;
	gap: 0.4rem 0.6rem;
	align-items: baseline;
	margin: 2.2rem 0 0.4rem;
	padding-top: 0.45rem;
	border-top: 1px solid var(--line);
}

.cmd h2 {
	border: 0;
	margin: 0;
	padding: 0;
	font-family: var(--mono);
	font-size: 1.2rem;
}

.cmd .tag {
	font-size: 0.7rem;
	text-transform: uppercase;
	letter-spacing: 0.06em;
	color: var(--muted);
	border: 1px solid var(--line-strong);
	border-radius: 999px;
	padding: 0.05rem 0.5rem;
	white-space: nowrap;
}

/* Numbered steps */

.steps {
	counter-reset: step;
	list-style: none;
	padding: 0;
	margin: 1.4rem 0;
}

.steps > li {
	position: relative;
	padding-left: 2.6rem;
	margin: 0 0 1.5rem;
	counter-increment: step;
}

.steps > li::before {
	content: counter(step);
	position: absolute;
	left: 0;
	top: 0.05rem;
	width: 1.8rem;
	height: 1.8rem;
	display: grid;
	place-items: center;
	background: var(--accent-soft);
	color: var(--accent);
	border-radius: 50%;
	font-family: var(--mono);
	font-size: 0.85rem;
	font-weight: 700;
}

.steps h3 {
	margin-top: 0;
}

/* Contents list */

.toc {
	margin: 1.2rem 0 2rem;
	padding: 0.9rem 1.1rem;
	background: var(--surface);
	border: 1px solid var(--line);
	border-radius: var(--radius);
}

.toc p {
	margin: 0 0 0.4rem;
	font-size: 0.78rem;
	text-transform: uppercase;
	letter-spacing: 0.05em;
	color: var(--muted);
}

.toc ul {
	margin: 0;
	padding-left: 1.1rem;
	columns: 2;
	column-gap: 2rem;
}

.toc li {
	font-size: 0.92rem;
}

/* Plain lists and two-column definition lists */

ul.plain,
ol.plain {
	padding-left: 1.2rem;
}

dl.spec {
	margin: 1.25rem 0;
}

dl.spec dt {
	font-weight: 600;
	margin-top: 0.9rem;
}

dl.spec dd {
	margin: 0.15rem 0 0;
	color: var(--muted);
}

/* Previous/next links */

.pager {
	display: flex;
	flex-wrap: wrap;
	justify-content: space-between;
	gap: 1rem;
	margin-top: 3rem;
	padding-top: 1rem;
	border-top: 1px solid var(--line);
	font-size: 0.92rem;
}

/* Footer */

.site-footer {
	border-top: 1px solid var(--line);
	background: var(--surface);
	color: var(--muted);
	font-size: 0.85rem;
	padding: 1.5rem 0 2rem;
}

.site-footer p {
	margin: 0 0 0.4rem;
}

.site-footer a {
	color: var(--muted);
}

.site-footer a:hover {
	color: var(--accent);
}

/* ---------------------------------------------------------------------
 * Small screens.  The navigation becomes one horizontally scrolling row,
 * so the sticky header stays two lines tall instead of stacking into five.
 * ------------------------------------------------------------------ */

@media (max-width: 46rem) {
	body {
		font-size: 16px;
	}

	.header-inner {
		padding-top: 0.7rem;
		padding-bottom: 0;
		gap: 0.15rem;
	}

	.brand {
		padding-bottom: 0.35rem;
	}

	.site-nav {
		margin-left: 0;
		width: 100%;
		font-size: 0.9rem;
		gap: 0 1.1rem;
		flex-wrap: nowrap;
		overflow-x: auto;
		scrollbar-width: none;
		-webkit-overflow-scrolling: touch;
	}

	.site-nav::-webkit-scrollbar {
		display: none;
	}

	.site-nav a {
		white-space: nowrap;
		padding: 0.55rem 0 0.6rem;
	}

	main {
		padding-top: 1.6rem;
		padding-bottom: 2.5rem;
	}

	h2 {
		margin-top: 2.1rem;
	}

	th,
	td {
		padding: 0.5rem 0.65rem;
	}

	pre {
		font-size: 0.8rem;
		padding: 0.8rem 0.85rem;
	}

	.hero {
		padding-top: 1.2rem;
		padding-bottom: 1rem;
	}
}

@media (max-width: 34rem) {
	.wrap,
	.inner {
		padding-inline: 1rem;
	}

	h1 {
		font-size: 1.65rem;
	}

	h2 {
		font-size: 1.2rem;
	}

	.cards,
	.grid {
		grid-template-columns: 1fr;
	}

	.toc ul {
		columns: 1;
	}

	.steps > li {
		padding-left: 2.2rem;
	}

	.facts li,
	.badges li {
		font-size: 0.75rem;
	}
}

@media (prefers-reduced-motion: reduce) {
	html {
		scroll-behavior: auto;
	}
}

@media print {
	.site-header,
	.site-footer,
	.pager,
	.toc,
	.skip,
	.skip-link {
		display: none;
	}

	body {
		background: #fff;
		color: #000;
		font-size: 11pt;
	}

	a {
		color: #000;
	}

	pre {
		background: #f2f2f2;
		color: #111;
		border: 1px solid #ccc;
		white-space: pre-wrap;
	}

	.table-wrap {
		overflow: visible;
	}

	.card,
	table,
	pre {
		box-shadow: none;
	}

	h2 {
		page-break-after: avoid;
	}
}