/* Defaults */
:root {
	--font-family: arial, sans-serif;
	--font-family-monospace: Consolas, Menlo, Monaco, Andale Mono WT, Andale Mono, Lucida Console, Lucida Sans Typewriter, DejaVu Sans Mono, Bitstream Vera Sans Mono, Liberation Mono, Nimbus Mono L, Courier New, Courier, monospace;
}

/* Theme colors */
:root {
	--color-gray-20: #e0e0e0;
	--color-gray-50: #C0C0C0;
	--color-gray-90: #333;

	--background-color: #fff;

	--text-color: var(--color-gray-90);
	--text-color-link: #082840;
	--text-color-link-active: #5f2b48;
	--text-color-link-visited: #17050F;

	--syntax-tab-size: 2;
}

@media (prefers-color-scheme: dark) {
	:root {
		--color-gray-20: #e0e0e0;
		--color-gray-50: #C0C0C0;
		--color-gray-90: #dad8d8;

		/* --text-color is assigned to --color-gray-_ above */
		--text-color-link: #1493fb;
		--text-color-link-active: #6969f7;
		--text-color-link-visited: #a6a6f8;

		--background-color: #15202b;
	}
}


/* Global stylesheet */
* {
	box-sizing: border-box;
}

@view-transition {
	navigation: auto;
}

html,
body {
	padding: 0;
	margin: 0 auto;
	font-family: var(--font-family);
	color: var(--text-color);
	background-color: var(--background-color);
}
html {
	overflow-y: scroll;
}
body {
	max-width: 40em;
}

/* https://www.a11yproject.com/posts/how-to-hide-content/ */
.visually-hidden:not(:focus):not(:active) {
	clip: rect(0 0 0 0);
	clip-path: inset(50%);
	height: 1px;
	overflow: hidden;
	position: absolute;
	white-space: nowrap;
	width: 1px;
}

/* Fluid images via https://www.zachleat.com/web/fluid-images/ */
img{
	max-width: 100%;
}
img[width][height] {
	height: auto;
}
img[src$=".svg"] {
	width: 100%;
	height: auto;
	max-width: none;
}
video,
iframe {
	width: 100%;
	height: auto;
}
iframe {
	aspect-ratio: 16/9;
}

p:last-child {
	margin-bottom: 0;
}
p {
	line-height: 1.5;
}

li {
	line-height: 1.5;
}

a[href] {
	color: var(--text-color-link);
}
a[href]:visited {
	color: var(--text-color-link-visited);
}
a[href]:hover,
a[href]:active {
	color: var(--text-color-link-active);
}

main,
footer {
	padding: 1rem;
}
main :first-child {
	margin-top: 0;
}

#skip-link {
	text-decoration: none;
	background: var(--background-color);
	color: var(--text-color);
	padding: 0.5rem 1rem;
	border: 1px solid var(--color-gray-90);
	border-radius: 2px;
}

/* Prevent visually-hidden skip link fom pushing content around when focused */
#skip-link.visually-hidden:focus {
	position: absolute;
	top: 1rem;
	left: 1rem;
	/* Ensure it is positioned on top of everything else when it is shown */
	z-index: 999;
}

table {
	margin: 1em 0;
}
table td,
table th {
	padding-right: 1em;
}

pre,
code {
	font-family: var(--font-family-monospace);
}

/* Header */
header {
	display: flex;
	gap: 1em;
	flex-wrap: wrap;
	justify-content: space-between;
	align-items: center;
	padding: 1em;
}
.home-link {
	flex-grow: 1;
	font-size: 1em; /* 16px /16 */
	font-weight: 700;
}
.home-link:link:not(:hover) {
	text-decoration: none;
}

/* Nav */
.nav {
	display: flex;
	gap: .5em 1em;
	padding: 0;
	margin: 0;
	list-style: none;
}
.nav-item {
	display: inline-block;
}
.nav-item a[href]:not(:hover) {
	text-decoration: none;
}
.nav a[href][aria-current="page"] {
	text-decoration: underline;
}