:root {
  --green: #2E6150;
  --green-dark: #234c3f;
  --bg: #f7f7f5;
  --card: #ffffff;
  --text: #1c2421;
  --muted: #5c6b65;
  --border: #e3e7e4;
  --radius: 16px;
  --maxw: 760px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  font-size: 17px;
}

a { color: var(--green); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header {
  background: var(--green);
  color: #fff;
}
.site-header .wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 18px;
  padding-bottom: 18px;
}
.logo {
  width: 38px; height: 38px;
  border-radius: 11px;
  background: rgba(255,255,255,0.16);
  display: grid; place-items: center;
  font-size: 20px;
}
.site-header .brand { font-weight: 700; font-size: 20px; }
.site-header nav { margin-left: auto; display: flex; gap: 18px; }
.site-header nav a { color: rgba(255,255,255,0.92); font-size: 15px; }

/* Hero (landing) */
.hero {
  background: linear-gradient(160deg, var(--green), var(--green-dark));
  color: #fff;
  text-align: center;
  padding: 64px 20px 72px;
}
.hero .badge {
  width: 84px; height: 84px; border-radius: 22px;
  background: rgba(255,255,255,0.16);
  display: grid; place-items: center; margin: 0 auto 22px;
  font-size: 44px;
}
.hero h1 { font-size: 40px; margin: 0 0 12px; letter-spacing: -0.5px; }
.hero p { font-size: 19px; max-width: 540px; margin: 0 auto; color: rgba(255,255,255,0.92); }
.hero .links { margin-top: 30px; display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 12px 22px; border-radius: 999px;
  font-weight: 600; font-size: 15px;
}
.btn-primary { background: #fff; color: var(--green); }
.btn-ghost { background: rgba(255,255,255,0.14); color: #fff; }

/* Content card */
main.doc { padding: 40px 0 64px; }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 34px 32px;
}
.doc h1 { font-size: 30px; margin: 0 0 6px; letter-spacing: -0.4px; }
.doc .updated { color: var(--muted); font-size: 14px; margin: 0 0 26px; }
.doc h2 {
  font-size: 20px; margin: 32px 0 10px; padding-top: 8px;
  border-top: 1px solid var(--border); padding-top: 26px;
}
.doc h2:first-of-type { border-top: none; padding-top: 0; }
.doc h3 { font-size: 17px; margin: 20px 0 6px; }
.doc p, .doc li { color: var(--text); }
.doc ul { padding-left: 22px; }
.doc li { margin: 4px 0; }
.muted { color: var(--muted); }

.note {
  background: #fff7e6;
  border: 1px solid #f0d692;
  border-radius: 12px;
  padding: 14px 16px;
  font-size: 15px;
  margin: 22px 0;
}
.fill { color: #b4471f; font-weight: 600; }

.toc {
  background: #f0f4f2;
  border-radius: 12px;
  padding: 16px 20px;
  margin: 0 0 28px;
}
.toc strong { display:block; margin-bottom: 6px; font-size: 14px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.toc ol { margin: 0; padding-left: 20px; columns: 2; column-gap: 28px; }
.toc a { font-size: 15px; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 26px 0;
  color: var(--muted);
  font-size: 14px;
}
.site-footer .wrap { display: flex; gap: 18px; flex-wrap: wrap; align-items: center; }
.site-footer nav { margin-left: auto; display: flex; gap: 16px; }

@media (max-width: 560px) {
  .hero h1 { font-size: 32px; }
  .card { padding: 24px 20px; }
  .toc ol { columns: 1; }
  .site-header nav { gap: 12px; }
}