:root {
  --bg: #f7faf9; --card: #ffffff; --fg: #17201d; --muted: #5b6b66; --line: #dbe5e1;
  --brand: #059669; --brand-dark: #047857; --brand-soft: #e7f6f0;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0e1513; --card: #151f1c; --fg: #e5eeeb; --muted: #9db0aa; --line: #2a3a35;
          --brand: #34d399; --brand-dark: #6ee7b7; --brand-soft: #13302a; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--fg);
       font: 16px/1.7 "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif; }
a { color: var(--brand-dark); }
header { background: var(--card); border-bottom: 1px solid var(--line); }
.bar { max-width: 960px; margin: 0 auto; padding: 12px 16px; display: flex; align-items: center; gap: 12px;
       flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--fg); font-weight: 700;
         font-size: 18px; }
.brand img { width: 36px; height: 36px; border-radius: 9px; }
nav.links { margin-left: auto; display: flex; gap: 6px 16px; flex-wrap: wrap; font-size: 15px; }
nav.links a { text-decoration: none; color: var(--muted); }
nav.links a:hover, nav.links a[aria-current] { color: var(--brand-dark); }
main { max-width: 960px; margin: 0 auto; padding: 32px 16px 64px; }
.doc { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 28px 32px; }
h1 { font-size: 30px; line-height: 1.25; margin: 0 0 6px; }
h2 { font-size: 20px; margin: 30px 0 8px; }
.sub { color: var(--muted); margin: 0 0 18px; }
li { margin: 4px 0; }
.box { border-left: 4px solid var(--brand); background: var(--brand-soft); padding: 12px 16px; border-radius: 0 10px 10px 0;
       margin: 16px 0; }
.hero { text-align: center; padding: 40px 0 24px; }
.hero img { width: 88px; height: 88px; border-radius: 20px; }
.hero h1 { font-size: 36px; margin-top: 14px; }
.hero p { color: var(--muted); max-width: 620px; margin: 8px auto 0; font-size: 18px; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 28px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 20px; }
.card h3 { margin: 0 0 6px; font-size: 17px; color: var(--brand-dark); }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
footer .bar { padding: 18px 16px; }
@media (max-width: 760px) {
  .grid { grid-template-columns: 1fr; }
  .doc { padding: 20px 18px; border-radius: 12px; }
  h1 { font-size: 25px; }
  .hero h1 { font-size: 28px; }
  nav.links { margin-left: 0; width: 100%; }
}