:root {
	--bg: #f8fafc;
	--card: #ffffff;
	--ink: #0f172a;
	--muted: #475569;
	--line: #e2e8f0;
	--accent: #0f172a;
	--accent-ink: #ffffff;
}
@media (prefers-color-scheme: dark) {
	:root {
		--bg: #0b1120;
		--card: #111827;
		--ink: #e5e7eb;
		--muted: #94a3b8;
		--line: #1f2937;
		--accent: #e5e7eb;
		--accent-ink: #0b1120;
	}
}
* { box-sizing: border-box; }
body {
	margin: 0;
	background: var(--bg);
	color: var(--ink);
	font: 16px/1.6 system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}
main { max-width: 640px; margin: 0 auto; padding: 32px 16px 64px; }
header .brand {
	font-size: 13px;
	font-weight: 600;
	letter-spacing: 0.3em;
	text-transform: uppercase;
	color: var(--muted);
	text-decoration: none;
}
h1 { font-size: 30px; line-height: 1.2; margin: 24px 0 8px; }
h2 { font-size: 18px; margin: 32px 0 8px; }
p, li { color: var(--muted); }
strong { color: var(--ink); }
.card {
	background: var(--card);
	border: 1px solid var(--line);
	border-radius: 16px;
	padding: 20px;
	margin: 20px 0;
}
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 12px; }
.button {
	display: inline-block;
	padding: 10px 18px;
	border-radius: 999px;
	border: 1px solid var(--line);
	color: var(--ink);
	text-decoration: none;
	font-weight: 600;
	font-size: 14px;
}
.button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.button[aria-disabled='true'] { opacity: 0.55; cursor: default; }
.small { font-size: 13px; }
footer { margin-top: 48px; font-size: 13px; color: var(--muted); }
footer a { color: var(--muted); }
code { font-size: 13px; word-break: break-all; }