/* A restrained editorial system for a technical publication. */

:root {
	--bg: #f5f4ef;
	--surface: #fbfaf7;
	--fg: #202521;
	--muted: #66706a;
	--accent: #a64b32;
	--accent-strong: #823822;
	--rule: #d9d9d0;
	--code-bg: #e9ece7;
	--focus: #1f6d72;
	--display: Georgia, "Iowan Old Style", "Palatino Linotype", "Book Antiqua", serif;
	--sans: "Avenir Next", "Segoe UI", sans-serif;
	--mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

@media (prefers-color-scheme: dark) {
	:root {
		--bg: #161a18;
		--surface: #1d2420;
		--fg: #edf0e9;
		--muted: #adb8ae;
		--accent: #e8a58c;
		--accent-strong: #ffc0a7;
		--rule: #35413b;
		--code-bg: #222b26;
		--focus: #9ed3d0;
	}
}

* { box-sizing: border-box; }

html {
	-webkit-text-size-adjust: 100%;
	background: var(--bg);
	scroll-behavior: smooth;
}

body {
	margin: 0;
	padding: 0 1.5rem 5rem;
	background: var(--bg);
	color: var(--fg);
	font: 1.0625rem/1.7 var(--display);
}

body,
button,
input,
textarea,
select { font-kerning: normal; }

a {
	color: var(--accent-strong);
	text-decoration-thickness: 1px;
	text-underline-offset: 0.18em;
	transition: color 160ms ease, border-color 160ms ease, background-color 160ms ease;
}

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

a:focus-visible {
	outline: 3px solid var(--focus);
	outline-offset: 4px;
	border-radius: 2px;
}

header.site,
main,
footer.site {
	width: min(100%, 68rem);
	margin-inline: auto;
}

header.site {
	margin-bottom: clamp(3.5rem, 8vw, 6.5rem);
	padding: clamp(1.5rem, 4vw, 2.75rem) 0 1.5rem;
	border-top: 3px solid var(--fg);
	border-bottom: 1px solid var(--rule);
}

.site-bar {
	display: flex;
	align-items: baseline;
	justify-content: space-between;
	gap: 2rem;
}

.site-title {
	color: var(--fg);
	font-family: var(--display);
	font-size: clamp(1.55rem, 2.6vw, 2rem);
	font-weight: 700;
	letter-spacing: -0.035em;
	line-height: 1;
	text-decoration: none;
}

.site-title::before {
	display: inline-block;
	width: 0.55em;
	height: 0.55em;
	margin-right: 0.42em;
	background: var(--accent);
	content: "";
	transform: translateY(-0.04em);
}

.site-nav {
	display: flex;
	align-items: center;
	gap: 1.25rem;
	font-family: var(--sans);
	font-size: 0.75rem;
	font-weight: 700;
	letter-spacing: 0.12em;
	text-transform: uppercase;
}

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

.site-nav a:hover { color: var(--fg); }

.site-description {
	max-width: 32rem;
	margin: 1.15rem 0 0;
	color: var(--muted);
	font-size: 1rem;
	line-height: 1.5;
}

main { min-height: 18rem; }

h1,
h2,
h3,
h4 {
	color: var(--fg);
	font-family: var(--display);
	font-weight: 700;
}

h1 {
	max-width: 18ch;
	margin: 0 0 1.25rem;
	font-size: clamp(2.35rem, 6vw, 4.8rem);
	letter-spacing: -0.055em;
	line-height: 0.98;
}

h2 {
	margin: 3rem 0 0.85rem;
	font-size: clamp(1.45rem, 2.3vw, 2rem);
	letter-spacing: -0.035em;
	line-height: 1.1;
}

h3 {
	margin: 2.25rem 0 0.65rem;
	font-size: 1.3rem;
	letter-spacing: -0.02em;
	line-height: 1.2;
}

p { margin: 0 0 1.1rem; }

.section-kicker,
.post-meta,
.back,
.sources h2,
footer.site {
	font-family: var(--sans);
}

.section-kicker {
	margin: 0 0 0.9rem;
	color: var(--accent-strong);
	font-size: 0.72rem;
	font-weight: 800;
	letter-spacing: 0.16em;
	line-height: 1.2;
	text-transform: uppercase;
}

.post-list {
	max-width: 54rem;
	list-style: none;
	margin: 0;
	padding: 0;
}

.post-list > li {
	padding: 1.75rem 0 1.9rem;
	border-top: 1px solid var(--rule);
}

.post-list > li:last-child { border-bottom: 1px solid var(--rule); }

.post-link {
	display: inline;
	color: var(--fg);
	font-family: var(--display);
	font-size: clamp(1.45rem, 2.4vw, 2rem);
	font-weight: 700;
	letter-spacing: -0.035em;
	line-height: 1.1;
	text-decoration: none;
}

.post-link:hover { color: var(--accent-strong); }

.post-description {
	max-width: 42rem;
	margin: 0.65rem 0 0.85rem;
	color: var(--muted);
	font-size: 1.03rem;
	line-height: 1.55;
}

.post-meta {
	display: flex;
	align-items: center;
	flex-wrap: wrap;
	gap: 0.35rem 0.65rem;
	margin: 0;
	color: var(--muted);
	font-size: 0.72rem;
	font-weight: 700;
	letter-spacing: 0.07em;
	line-height: 1.5;
	text-transform: uppercase;
}

.post-meta time { color: var(--fg); }

.tag-list {
	display: inline-flex;
	flex-wrap: wrap;
	gap: 0.4rem;
}

.tag {
	display: inline-block;
	padding: 0.22rem 0.55rem;
	border: 1px solid var(--rule);
	border-radius: 999px;
	color: var(--muted);
	font-family: var(--sans);
	font-size: 0.68rem;
	font-weight: 700;
	letter-spacing: 0.03em;
	line-height: 1.2;
	text-decoration: none;
	text-transform: none;
}

a.tag:hover {
	border-color: var(--accent);
	background: color-mix(in srgb, var(--accent) 8%, transparent);
	color: var(--accent-strong);
}

article { max-width: 54rem; }

article > h1 { max-width: 15ch; }

.article-dek {
	max-width: 42rem;
	margin: -0.25rem 0 1.25rem;
	color: var(--muted);
	font-size: clamp(1.12rem, 2vw, 1.35rem);
	line-height: 1.45;
}

.prose {
	max-width: 44rem;
	margin-top: 3.5rem;
}

.prose > * + * { margin-top: 1.25rem; }

.prose p { margin-bottom: 0; }

.prose a { color: var(--accent-strong); }

.prose ul,
.prose ol {
	margin: 0;
	padding-left: 1.4rem;
}

.prose li + li { margin-top: 0.4rem; }

.prose blockquote {
	margin-right: 0;
	margin-left: 0;
	padding: 0.2rem 0 0.2rem 1.25rem;
	border-left: 3px solid var(--accent);
	color: var(--muted);
	font-size: 1.15em;
	font-style: italic;
}

.prose code {
	padding: 0.12em 0.35em;
	border: 1px solid color-mix(in srgb, var(--rule) 80%, transparent);
	border-radius: 3px;
	background: var(--code-bg);
	font-family: var(--mono);
	font-size: 0.82em;
}

.prose pre {
	margin-inline: -1rem;
	padding: 1.2rem 1rem;
	border: 1px solid var(--rule);
	border-radius: 4px;
	background: var(--code-bg);
	overflow-x: auto;
}

.prose pre code {
	padding: 0;
	border: 0;
	background: none;
	font-size: 0.8rem;
	line-height: 1.65;
}

.prose table {
	width: 100%;
	border-collapse: collapse;
	font-family: var(--sans);
	font-size: 0.9rem;
}

.prose th,
.prose td {
	padding: 0.7rem 0.8rem;
	border-bottom: 1px solid var(--rule);
	text-align: left;
}

.prose th {
	color: var(--fg);
	font-size: 0.75rem;
	letter-spacing: 0.08em;
	text-transform: uppercase;
}

.prose img { max-width: 100%; height: auto; }

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

.sources {
	max-width: 44rem;
	margin-top: 4rem;
	padding-top: 1.25rem;
	border-top: 1px solid var(--rule);
}

.sources h2 {
	margin: 0 0 0.9rem;
	color: var(--muted);
	font-size: 0.7rem;
	font-weight: 800;
	letter-spacing: 0.15em;
	line-height: 1.2;
	text-transform: uppercase;
}

.sources ul { margin: 0; padding: 0; list-style: none; }

.sources li + li { margin-top: 0.55rem; }

.sources a {
	display: inline-block;
	max-width: 100%;
	font-family: var(--sans);
	font-size: 0.82rem;
	font-weight: 600;
	overflow-wrap: anywhere;
}

.empty {
	max-width: 34rem;
	padding: 1.5rem 0;
	color: var(--muted);
	font-style: italic;
}

.back {
	margin-top: 3rem;
	font-size: 0.78rem;
	font-weight: 700;
	letter-spacing: 0.08em;
	text-transform: uppercase;
}

.error-page { padding-bottom: 2rem; }
.error-page p:not(.section-kicker) { max-width: 32rem; }

footer.site {
	margin-top: clamp(5rem, 12vw, 9rem);
	padding: 1.25rem 0 0;
	border-top: 1px solid var(--rule);
	color: var(--muted);
	font-size: 0.75rem;
	letter-spacing: 0.02em;
}

footer.site p { margin: 0; }

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

@media (max-width: 600px) {
	body { padding-inline: 1.1rem; }

	.site-bar {
		align-items: flex-start;
		flex-direction: column;
		gap: 1.25rem;
	}

	.site-nav { gap: 1rem; }

	.post-list > li { padding-block: 1.45rem; }

	.prose { margin-top: 2.75rem; }

	.prose pre { margin-inline: 0; }
}

@media (prefers-reduced-motion: reduce) {
	html { scroll-behavior: auto; }
	a { transition: none; }
}