:root {
  --bg: #ffffff;
  --ink: #0b0b0c;
  --muted: #6b7280;
  --accent: #2563eb;
  --line: #ededf1;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { -webkit-font-smoothing: antialiased; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 26px clamp(20px, 5vw, 64px);
  border-bottom: 1px solid var(--line);
}
.wordmark { font-size: 20px; font-weight: 600; letter-spacing: -0.02em; color: var(--ink); text-decoration: none; }
.wordmark b { color: var(--accent); }
.top-link { font-size: 15px; color: var(--muted); text-decoration: none; }
.top-link:hover { color: var(--ink); }

main { max-width: 760px; margin: 0 auto; padding: 56px clamp(20px, 5vw, 32px) 96px; }

h1 { font-size: clamp(30px, 5vw, 42px); letter-spacing: -0.02em; margin-bottom: 8px; }
.updated { color: var(--muted); font-size: 14px; margin-bottom: 44px; }

h2 { font-size: 20px; margin: 38px 0 12px; letter-spacing: -0.01em; }
p, li { color: #26272b; font-size: 16px; margin-bottom: 14px; }
ul { padding-left: 22px; }
a { color: var(--accent); }

footer {
  border-top: 1px solid var(--line);
  padding: 26px clamp(20px, 5vw, 64px);
  font-size: 14px;
  color: var(--muted);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-links { display: flex; gap: 20px; }
footer a { color: var(--muted); text-decoration: none; }
footer a:hover { color: var(--ink); }