:root {
  --bg: #fbf8f3;
  --surface: #ffffff;
  --text: #1f1d1a;
  --muted: #6b655d;
  --accent: #1f7a5a;
  --accent-soft: #e4f2ec;
  --border: #e8e2d8;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161513;
    --surface: #1f1e1b;
    --text: #f2efe9;
    --muted: #a8a197;
    --accent: #5cc49b;
    --accent-soft: #1d3329;
    --border: #2f2d29;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 17px;
  line-height: 1.6;
}
a { color: var(--accent); }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 20px; }
header.site {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
header.site .wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 20px; color: var(--text); text-decoration: none;
}
.mark {
  width: 32px; height: 32px; border-radius: 9px;
  background: var(--accent); color: #fff;
  display: grid; place-items: center; font-weight: 800; font-size: 18px;
}
nav a { color: var(--muted); text-decoration: none; margin-left: 18px; font-size: 15px; }
nav a:hover { color: var(--text); }
.hero { padding: 72px 0 40px; }
.pill {
  display: inline-block; padding: 4px 12px; border-radius: 999px;
  background: var(--accent-soft); color: var(--accent);
  font-size: 14px; font-weight: 600;
}
h1 { font-size: clamp(34px, 6vw, 48px); line-height: 1.15; margin: 18px 0 16px; letter-spacing: -0.02em; }
.lead { font-size: 19px; color: var(--muted); max-width: 600px; margin: 0; }
.steps { display: grid; gap: 14px; padding: 24px 0 8px; }
.step {
  background: var(--surface); border: 1px solid var(--border); border-radius: 14px;
  padding: 20px 22px;
}
.step h3 { margin: 0 0 4px; font-size: 18px; }
.step p { margin: 0; color: var(--muted); }
.note { color: var(--muted); font-size: 15px; padding: 24px 0 56px; }
.doc { padding: 48px 0 64px; }
.doc h1 { font-size: clamp(30px, 5vw, 40px); margin-top: 0; }
.doc h2 { font-size: 20px; margin: 32px 0 8px; }
.doc .updated { color: var(--muted); margin-top: -8px; }
.doc ul { padding-left: 22px; }
.doc li { margin: 4px 0; }
footer.site { border-top: 1px solid var(--border); padding: 24px 0 40px; color: var(--muted); font-size: 14px; }
footer.site a { color: var(--muted); margin-right: 16px; }
@media (max-width: 480px) {
  nav a { margin-left: 12px; }
  .hero { padding-top: 48px; }
}