/* Braille Screen Technologies -- self-hosted CSS, system fonts only, no external requests. */

:root {
	--ink: #1b1a17;
	--paper: #faf7f1;
	--paper-raised: #f1ecdf;
	--accent: #19495c;
	--accent-strong: #0f2f3b;
	--rule: #c9c0a8;
	--max-width: 46rem;
	--space-1: 0.5rem;
	--space-2: 1rem;
	--space-3: 1.75rem;
	--space-4: 3rem;
	--space-5: 5rem;
}

@media (prefers-color-scheme: dark) {
	:root {
		--ink: #f3f0e8;
		--paper: #15181a;
		--paper-raised: #1f2326;
		--accent: #8fd1e8;
		--accent-strong: #c7eaf5;
		--rule: #3a3f42;
	}
}

* {
	box-sizing: border-box;
}

html {
	font-size: 100%;
}

body {
	margin: 0;
	background: var(--paper);
	color: var(--ink);
	font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
	line-height: 1.6;
	font-size: 1.125rem;
}

h1, h2, h3, h4 {
	font-family: Georgia, "Iowan Old Style", "Palatino Linotype", "Book Antiqua", serif;
	line-height: 1.25;
	color: var(--ink);
	font-weight: 700;
}

h1 {
	font-size: clamp(1.9rem, 5vw, 2.75rem);
	margin: 0 0 var(--space-3);
}

h2 {
	font-size: 1.5rem;
	margin: var(--space-4) 0 var(--space-2);
}

h3 {
	font-size: 1.2rem;
	margin: var(--space-3) 0 var(--space-1);
}

p, ul, ol, dl {
	margin: 0 0 var(--space-2);
	max-width: 38em;
}

ul, ol {
	padding-left: 1.3em;
}

li + li {
	margin-top: 0.35em;
}

a {
	color: var(--accent-strong);
	text-decoration: underline;
	text-decoration-thickness: 0.08em;
	text-underline-offset: 0.12em;
	overflow-wrap: anywhere;
	word-break: break-word;
}

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

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
	outline: 3px solid var(--accent-strong);
	outline-offset: 2px;
	border-radius: 2px;
}

.skip-link {
	position: absolute;
	left: -999px;
	top: 0;
	background: var(--accent-strong);
	color: var(--paper);
	padding: 0.6em 1em;
	z-index: 100;
	text-decoration: none;
	font-weight: 600;
}

.skip-link:focus {
	left: var(--space-2);
	top: var(--space-2);
}

.wrap {
	max-width: 56rem;
	margin: 0 auto;
	padding: 0 var(--space-3);
}

.site-header {
	border-bottom: 1px solid var(--rule);
	background: var(--paper);
}

.site-header__inner {
	display: flex;
	flex-direction: column;
	align-items: flex-start;
	gap: var(--space-2);
	padding-top: var(--space-2);
	padding-bottom: var(--space-2);
}

.site-header__brand {
	font-family: Georgia, "Iowan Old Style", "Palatino Linotype", "Book Antiqua", serif;
	font-weight: 700;
	font-size: 1.15rem;
	text-decoration: none;
	color: var(--ink);
}

.site-header__brand:hover {
	color: var(--accent);
	text-decoration: underline;
}

.nav-list {
	display: flex;
	flex-wrap: wrap;
	align-items: baseline;
	gap: var(--space-2) var(--space-3);
	list-style: none;
	margin: 0;
	padding: 0;
}

.nav-list a {
	text-decoration: none;
	font-weight: 600;
	border-bottom: 2px solid transparent;
	padding-bottom: 0.15em;
}

.nav-list a:hover {
	border-bottom-color: var(--accent);
}

.nav-list a[aria-current="page"] {
	border-bottom-color: var(--accent-strong);
}

main {
	padding-top: var(--space-4);
	padding-bottom: var(--space-5);
}

.lede {
	font-size: 1.3rem;
	max-width: 36em;
	color: var(--ink);
}

.card-list {
	list-style: none;
	padding: 0;
	margin: var(--space-3) 0;
	display: grid;
	gap: var(--space-3);
}

.card {
	border: 1px solid var(--rule);
	background: var(--paper-raised);
	border-radius: 6px;
	padding: var(--space-3);
}

.card h2,
.card h3 {
	margin-top: 0;
}

blockquote {
	border-left: 4px solid var(--rule);
	margin: var(--space-3) 0;
	padding: 0.2em 0 0.2em var(--space-2);
	color: var(--ink);
}

table {
	border-collapse: collapse;
	width: 100%;
	margin: var(--space-3) 0;
}

caption {
	text-align: left;
	font-weight: 600;
	margin-bottom: var(--space-1);
}

th, td {
	border: 1px solid var(--rule);
	padding: 0.5em 0.75em;
	text-align: left;
	vertical-align: top;
}

th {
	background: var(--paper-raised);
}

.callout {
	border: 1px solid var(--rule);
	border-left: 4px solid var(--accent-strong);
	background: var(--paper-raised);
	padding: var(--space-2) var(--space-3);
	margin: var(--space-3) 0;
}

.site-footer {
	border-top: 1px solid var(--rule);
	background: var(--paper-raised);
}

.site-footer__inner {
	padding: var(--space-3) var(--space-3);
	display: flex;
	flex-wrap: wrap;
	justify-content: space-between;
	gap: var(--space-2);
	font-size: 0.95rem;
}

.footer-links {
	list-style: none;
	display: flex;
	flex-wrap: wrap;
	gap: var(--space-2) var(--space-3);
	margin: 0;
	padding: 0;
	min-width: 0;
}

.footer-links li {
	min-width: 0;
}

/* The global li + li spacing would push the second footer link down a few pixels in the flex row. */
.footer-links li + li {
	margin-top: 0;
}

code {
	font-family: ui-monospace, "Cascadia Code", "SF Mono", Consolas, monospace;
	background: var(--paper-raised);
	padding: 0.1em 0.35em;
	border-radius: 3px;
	font-size: 0.95em;
}

@media (prefers-reduced-motion: no-preference) {
	a, .nav-list a {
		transition: color 120ms ease, border-color 120ms ease;
	}
}

@media (max-width: 30rem) {
	body {
		font-size: 1.05rem;
	}
}

.site-header nav {
	width: 100%;
}

main > h1:first-child {
	margin-top: var(--space-3);
}

.nav-list {
	max-width: none;
}