/* Layout A: fixed left sidebar — header pinned, content scrolls */

* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}

body {
	font-family: times new roman, serif;
	font-size: 1.1rem;
	line-height: 1.5;
	color: #222;
	background: #fff;
	letter-spacing: 0.01em;
	font-feature-settings: "kern" 1;
	text-rendering: optimizeLegibility;
}

/* ── fixed sidebar ── */

header {
	position: fixed;
	top: 0;
	left: 0;
	width: 240px;
	height: 100vh;
	padding: 2.7rem 2rem 5rem 2.5rem;
	overflow-y: auto;
}

header h1 {
	font-size: 1.3rem;
	font-weight: 400;
	color: #000;
	margin-bottom: 0.6rem;
	letter-spacing: 0.01em;
}

header p:first-of-type {
	font-size: 0;
	margin-bottom: 1.8rem;
}

header p:first-of-type a {
	font-size: 0.9rem;
	color: #bbb;
	text-decoration: none;
	border-bottom: none;
	display: inline;
}

header p:first-of-type a:hover {
	color: #555;
}

header p:first-of-type a + a::before {
	content: "·";
	color: #ddd;
	padding: 0 0.5em;
	font-size: 0.9rem;
}

header p:nth-of-type(n+2) {
	font-size: 0.85rem;
	color: #999;
	line-height: 1.55;
}

header p:last-of-type {
	margin-top: 1.9rem;
}

header p:last-of-type a {
	font-size: 0.85rem;
	color: #999;
	border-bottom-color: #ddd;
}

header p:last-of-type a:hover {
	color: #555;
	border-bottom-color: #999;
}

/* ── scrolling content — two-column grid ── */

main {
	margin-left: 240px;
	padding: 3rem 5rem 3rem 8rem;
	max-width: 59rem;
	display: grid;
	grid-template-columns: 6rem 1fr;
	column-gap: 3rem;
	align-items: baseline;
}

/* ── date headers — in left column ── */

h2 {
	grid-column: 1;
	align-self: baseline;
	font-size: 1.1rem;
	font-weight: 400;
	color: #aaa;
	letter-spacing: 0;
	margin: 0;
}

/* ── paragraph content — also in right column ── */

main p {
	grid-column: 2;
}

/* ── bullet content — in right column ── */

ul {
	grid-column: 2;
	align-self: baseline;
	list-style: none;
	padding-left: 1em;
	margin: 0;
}

ul li {
	position: relative;
	padding-left: 1em;
	margin-bottom: 0.8em;
}

ul ul li:first-child {
	margin-top: 0.8em;
}


ul li::before {
	content: "•";
	position: absolute;
	left: 0;
}

/* ── dividers span both columns ── */

hr {
	grid-column: 1 / -1;
	border: none;
	border-top: 1px solid #e5e5e5;
	margin-bottom: 3.6rem;
	margin-top: 3rem;
}

/* ── footer ── */

footer {
	position: fixed;
	bottom: 0;
	left: 0;
	width: 280px;
	padding: 0 2rem 2rem 2.5rem;
	font-size: 0.85rem;
	line-height: 1.6;
	color: #999;
}

p {
	margin: 1em 0;
}

a {
	color: #222;
	text-decoration: none;
	border-bottom: 1px solid #ccc;
}

a:hover {
	border-bottom-color: #000;
}

::selection {
	background: #ddd;
	color: #000;
}

footer a {
	color: #999;
	border-bottom: 1px solid #ddd;
}

footer a:hover {
	border-bottom-color: #999;
}

/* ── mobile: unfix sidebar, collapse grid ── */

@media (max-width: 700px) {
	header {
		position: static;
		width: 100%;
		height: auto;
		padding: 2rem 1.5rem 1rem;
	}

	header p:last-of-type {
		margin-top: 1.5rem;
	}

	main {
		margin-left: 0;
		padding: 1rem 1.5rem 3rem;
		max-width: 100%;
		grid-template-columns: 1fr;
		column-gap: 0;
	}

	h2 {
		grid-column: 1;
		padding-top: 1.8rem;
		margin-bottom: 0.2rem;
	}

	main p {
		grid-column: 1;
	}

	ul {
		grid-column: 1;
	}

	hr {
		margin-top: 1.5rem;
		margin-bottom: 1.5rem;
	}

	footer {
		position: static;
		width: 100%;
		padding: 2rem 1.5rem 3rem;
		text-align: center;
	}
}

/* ── dark mode ── */

@media (prefers-color-scheme: dark) {
	body { background: #111; color: #ccc; }
	header { background: #111; }
	header h1 { color: #eee; }
	header p:first-of-type a { color: #555; }
	header p:first-of-type a:hover { color: #999; }
	header p:first-of-type a + a::before { color: #333; }
	header p:last-of-type { color: #555; }
	h2 { color: #555; }
	a { color: #ccc; border-bottom-color: #444; }
	a:hover { border-bottom-color: #ccc; }
	hr { border-top-color: #222; }
	footer { background: #111; color: #555; }
	footer a { color: #555; border-bottom-color: #333; }
	footer a:hover { border-bottom-color: #555; }
	::selection { background: #333; color: #eee; }
}