:root {
	--color-bg: #fff;
	--color-text: #1a1a1a;
	--color-muted: #5a6472;
	--color-accent: #2e86ab;
	--color-border: #e4e7ec;

	--font: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
	--measure: 65ch;
}

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

body {
	margin: 0;
	padding: 2rem 1rem 4rem;
	background: var(--color-bg);
	color: var(--color-text);
	font-family: var(--font);
	font-size: 1.0625rem;
	line-height: 1.6;
}

/* Pages needing more room widen main in their own stylesheet. */
main,
.back {
	max-width: var(--measure);
	margin: 0 auto;
}

.back {
	display: block;
	margin-bottom: 2rem;
	color: var(--color-muted);
	font-size: 0.9rem;
	text-decoration: none;
}

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

h1 {
	margin: 0 0 1.5rem;
	font-size: 2rem;
	line-height: 1.2;
	letter-spacing: -0.02em;
}

h2 {
	margin: 0 0 0.25rem;
	font-size: 1.15rem;
	line-height: 1.3;
}

p {
	margin: 0 0 0.5rem;
	color: var(--color-muted);
}

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

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

/* Every page lists its content as ul > li; each styles the li itself. */
main ul {
	margin: 0;
	padding: 0;
	list-style: none;
}