:root {
  --bg: #F8F8F7;
  --ink: #0A0A0A;
  --mute: #5E5E5A;
  --mute-2: #8E8E8A;
  --line: rgba(10, 10, 10, 0.08);
  --accent: #115E59;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: 'Geist', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 15px;
  line-height: 1.7;
}
.wrap { max-width: 800px; margin: 0 auto; padding: 0 32px; }
nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(16px);
  background: rgba(248, 248, 247, 0.85);
  border-bottom: 1px solid var(--line);
  height: 60px;
  display: flex; align-items: center;
}
nav .wrap { display: flex; align-items: center; justify-content: space-between; width: 100%; }
nav .logo { font-weight: 600; font-size: 17px; letter-spacing: -0.02em; }
nav .logo span { color: var(--accent); }
nav a { color: var(--mute); text-decoration: none; font-size: 13px; margin-left: 24px; }
nav a:hover { color: var(--ink); }
.hero { padding: 80px 0 40px; }
.eyebrow {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--mute);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.eyebrow::before {
  content: "";
  width: 4px; height: 4px; border-radius: 50%;
  background: #5EEAD4;
}
h1 {
  font-size: 52px;
  line-height: 1.05;
  letter-spacing: -0.035em;
  font-weight: 600;
  margin-bottom: 16px;
  max-width: 720px;
}
h1 span { color: var(--mute); }
.updated {
  font-size: 12px;
  color: var(--mute-2);
  margin-bottom: 48px;
}
article h2 {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-top: 40px;
  margin-bottom: 12px;
}
article h3 {
  font-size: 16px;
  font-weight: 600;
  margin-top: 24px;
  margin-bottom: 8px;
}
article p {
  margin-bottom: 14px;
  color: var(--ink);
}
article ul, article ol {
  margin: 14px 0 14px 24px;
  color: var(--ink);
}
article li { margin-bottom: 6px; }
article a { color: var(--accent); text-decoration: underline; }
article strong { font-weight: 600; }
footer {
  margin-top: 80px;
  padding: 40px 0;
  border-top: 1px solid var(--line);
  text-align: center;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--mute-2);
}
footer a { color: var(--mute); text-decoration: none; margin: 0 12px; }
footer a:hover { color: var(--ink); }
@media (max-width: 640px) {
  h1 { font-size: 36px; }
  .hero { padding: 48px 0 24px; }
  nav a { margin-left: 12px; }
}