:root {
  --bg: #fbfaf6;
  --surface: #ffffff;
  --ink: #0f1419;
  --ink-soft: #5a5a5a;
  --accent: #f97316;
  --border: #ece8df;
  --max: 720px;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  font-size: 17px;
  line-height: 1.6;
}
header.site {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
header.site .wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
header.site .brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  color: var(--ink);
  text-decoration: none;
}
header.site .brand img {
  width: 32px; height: 32px; border-radius: 7px;
}
header.site nav a {
  color: var(--ink-soft);
  text-decoration: none;
  margin-left: 18px;
  font-size: 14px;
  font-weight: 500;
}
header.site nav a:hover { color: var(--accent); }
main.doc {
  max-width: var(--max);
  margin: 0 auto;
  padding: 48px 24px 96px;
}
main.doc h1 {
  font-family: "New York", Georgia, serif;
  font-size: 40px;
  font-weight: 700;
  margin: 0 0 6px;
  letter-spacing: -0.01em;
}
main.doc .meta {
  color: var(--ink-soft);
  font-size: 14px;
  margin-bottom: 32px;
}
main.doc h2 {
  font-family: "New York", Georgia, serif;
  font-size: 24px;
  margin-top: 40px;
  margin-bottom: 12px;
}
main.doc h3 {
  font-size: 17px;
  margin-top: 28px;
  margin-bottom: 8px;
  font-weight: 700;
}
main.doc p, main.doc li {
  color: var(--ink);
}
main.doc ul {
  padding-left: 22px;
}
main.doc strong { color: var(--ink); }
main.doc a { color: var(--accent); }
footer.site {
  border-top: 1px solid var(--border);
  padding: 24px;
  text-align: center;
  font-size: 13px;
  color: var(--ink-soft);
}
footer.site a { color: var(--ink-soft); margin: 0 8px; }

/* Landing-only */
.hero {
  text-align: center;
  padding: 96px 24px 64px;
  max-width: 720px;
  margin: 0 auto;
}
.hero h1 {
  font-family: "New York", Georgia, serif;
  font-size: 56px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
  line-height: 1.05;
}
.hero p {
  font-size: 19px;
  color: var(--ink-soft);
  max-width: 540px;
  margin: 0 auto 36px;
}
.hero .icon {
  width: 96px;
  height: 96px;
  border-radius: 22px;
  display: block;
  margin: 0 auto 28px;
  box-shadow: 0 8px 28px rgba(15, 20, 25, 0.08);
}
.features {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  max-width: 720px;
  margin: 24px auto 0;
  padding: 0 24px;
}
@media (min-width: 640px) {
  .features { grid-template-columns: 1fr 1fr; }
}
.feature {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px;
}
.feature h3 {
  margin: 0 0 6px;
  font-size: 16px;
}
.feature p {
  margin: 0;
  font-size: 14px;
  color: var(--ink-soft);
}