@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

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

body {
	font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
	background: #fff;
	color: #111;
	padding: 2rem;
	line-height: 1.5;
}

.container {
	max-width: 900px;
	margin: 0 auto;
}

header h1 {
	font-size: 3rem;
	font-weight: 900;
	letter-spacing: -0.04em;
	text-transform: uppercase;
	line-height: 0.92;
}

.subtitle {
	font-size: 0.75rem;
	font-weight: 500;
	letter-spacing: 0.1em;
	text-transform: uppercase;
	color: #999;
	margin-top: 0.5rem;
}

h2 {
	font-size: 0.65rem;
	font-weight: 700;
	letter-spacing: 0.14em;
	text-transform: uppercase;
	color: #999;
	margin-bottom: 1rem;
	padding-bottom: 0.5rem;
	border-bottom: 1px solid #e0e0e0;
}

.meta {
	font-size: 0.75rem;
	color: #666;
	margin-bottom: 1.5rem;
}

.divider {
	border: none;
	border-top: 1px solid #e0e0e0;
	margin: 2rem 0;
}

/* ── Metrics Grid ─────────────────────────────────────────────────────── */
.grid-4 {
	display: grid;
	grid-template-columns: repeat(4, 1fr);
	gap: 1px;
	background: #e0e0e0;
	border: 1px solid #e0e0e0;
	margin-bottom: 1rem;
}

.metric {
	background: #fff;
	padding: 1.25rem 1rem;
	text-align: center;
}

.metric .label {
	display: block;
	font-size: 0.6rem;
	font-weight: 700;
	letter-spacing: 0.14em;
	text-transform: uppercase;
	color: #999;
	margin-bottom: 0.5rem;
}

.metric .value {
	display: block;
	font-size: 2rem;
	font-weight: 800;
	letter-spacing: -0.03em;
	line-height: 1;
	color: #111;
}

.metric .std {
	display: block;
	font-size: 0.7rem;
	font-weight: 500;
	color: #999;
	margin-top: 0.25rem;
}

/* ── Tables ───────────────────────────────────────────────────────────── */
table {
	width: 100%;
	border-collapse: collapse;
	font-size: 0.8rem;
	margin-bottom: 1rem;
}

thead th {
	font-size: 0.6rem;
	font-weight: 700;
	letter-spacing: 0.12em;
	text-transform: uppercase;
	color: #999;
	text-align: left;
	padding: 0.6rem 0.75rem;
	border-bottom: 2px solid #111;
}

tbody td {
	padding: 0.6rem 0.75rem;
	border-bottom: 1px solid #f2f2f2;
	color: #111;
}

tbody tr.highlight {
	background: #fafafa;
}

/* ── Architecture Diagram ─────────────────────────────────────────────── */
.arch {
	background: #fafafa;
	border: 1px solid #e0e0e0;
	padding: 1.25rem;
}

.arch pre {
	font-family: 'SF Mono', 'Fira Code', monospace;
	font-size: 0.7rem;
	line-height: 1.8;
	color: #555;
	white-space: pre;
	overflow-x: auto;
}

/* ── Code Block ───────────────────────────────────────────────────────── */
.code-block {
	background: #111;
	color: #e0e0e0;
	padding: 1.25rem;
	border-radius: 4px;
	overflow-x: auto;
}

.code-block pre {
	font-family: 'SF Mono', 'Fira Code', monospace;
	font-size: 0.75rem;
	line-height: 1.6;
}

/* ── Links ────────────────────────────────────────────────────────────── */
.links {
	display: flex;
	gap: 1rem;
	flex-wrap: wrap;
}

.links a {
	font-size: 0.7rem;
	font-weight: 700;
	letter-spacing: 0.1em;
	text-transform: uppercase;
	color: #111;
	text-decoration: none;
	padding: 0.5rem 1rem;
	border: 1px solid #111;
	transition: all 0.12s ease;
}

.links a:hover {
	background: #E63946;
	border-color: #E63946;
	color: #fff;
}

/* ── Footer ───────────────────────────────────────────────────────────── */
footer {
	margin-top: 3rem;
	padding-top: 1rem;
	border-top: 1px solid #e0e0e0;
	text-align: center;
}

footer p {
	font-size: 0.6rem;
	letter-spacing: 0.12em;
	text-transform: uppercase;
	color: #bbb;
}

/* ── Responsive ───────────────────────────────────────────────────────── */
@media (max-width: 768px) {
	.grid-4 {
		grid-template-columns: repeat(2, 1fr);
	}
	header h1 {
		font-size: 2rem;
	}
}