:root {
  --bg: #fafaf9;
  --ink: #1c1917;
  --muted: #57534e;
  --line: #e7e5e4;
  --accent: #4f46e5;
  --accent-soft: #eef2ff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0c0a09;
    --ink: #f5f5f4;
    --muted: #a8a29e;
    --line: #292524;
    --accent: #818cf8;
    --accent-soft: #1e1b4b;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Inter", "Segoe UI", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}
header, main, footer { width: 100%; max-width: 760px; margin: 0 auto; padding-left: 24px; padding-right: 24px; }
header { padding-top: 28px; }
header a { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-weight: 650; }
header svg { width: 28px; height: 28px; color: var(--accent); }
main { flex: 1; padding-top: clamp(32px, 6vw, 64px); padding-bottom: 56px; }
h1 { margin: 0; font-size: clamp(34px, 6vw, 52px); line-height: 1.05; letter-spacing: -0.03em; font-weight: 750; }
.updated { margin: 12px 0 0; color: var(--muted); font-size: 15px; }
.summary { margin: 28px 0 8px; padding: 18px 20px; border-radius: 14px; background: var(--accent-soft); }
.summary p, .summary ul { margin: 0; }
.summary ul { padding-left: 20px; }
h2 { margin: 40px 0 8px; font-size: 21px; letter-spacing: -0.01em; }
h3 { margin: 24px 0 4px; font-size: 17px; }
p, li { color: var(--ink); }
ul { padding-left: 22px; }
li { margin: 4px 0; }
a { color: var(--accent); }
.muted { color: var(--muted); }
footer { padding-top: 24px; padding-bottom: 24px; color: var(--muted); font-size: 13.5px; border-top: 1px solid var(--line); }
footer nav { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 8px; }
footer nav a { color: var(--muted); }
footer p { margin: 0 0 4px; }