:root {
  --bg: #fbf8f3;
  --surface: #ffffff;
  --ink: #17231f;
  --muted: #5b6b65;
  --line: #e6e0d6;
  --accent: #0f7a63;
  --accent-ink: #ffffff;
  --sea: #e3f1ec;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1614;
    --surface: #16201d;
    --ink: #eef3f1;
    --muted: #9fb0aa;
    --line: #26332f;
    --accent: #3cc49f;
    --accent-ink: #062019;
    --sea: #12302a;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.6 "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
}
a { color: var(--accent); }
.wrap { max-width: 960px; margin: 0 auto; padding: 0 20px; }
header.top { display: flex; align-items: center; justify-content: space-between; padding: 22px 0; }
.logo { font-weight: 800; font-size: 22px; letter-spacing: -0.02em; color: var(--ink); text-decoration: none; }
.logo span { color: var(--accent); }
nav a { color: var(--muted); text-decoration: none; margin-left: 18px; font-size: 15px; }
nav a:hover { color: var(--ink); }
.hero { padding: 56px 0 40px; }
.hero h1 { font-size: clamp(34px, 6vw, 56px); line-height: 1.08; letter-spacing: -0.03em; margin: 0 0 18px; max-width: 14ch; }
.hero p { font-size: 20px; color: var(--muted); max-width: 46ch; margin: 0 0 28px; }
.btn { display: inline-block; background: var(--accent); color: var(--accent-ink); padding: 13px 22px; border-radius: 999px; font-weight: 600; text-decoration: none; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; padding: 24px 0 56px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 18px; padding: 24px; }
.card h2 { font-size: 19px; margin: 0 0 8px; }
.card p { margin: 0; color: var(--muted); font-size: 16px; }
.tag { display: inline-block; font-size: 13px; font-weight: 600; color: var(--accent); background: var(--sea); border-radius: 999px; padding: 3px 10px; margin-bottom: 12px; }
.steps { background: var(--sea); border-radius: 24px; padding: 32px 28px; margin-bottom: 56px; }
.steps h2 { margin: 0 0 16px; font-size: 24px; }
.steps ol { margin: 0; padding-left: 22px; }
.steps li { margin: 6px 0; }
footer { border-top: 1px solid var(--line); padding: 24px 0 40px; color: var(--muted); font-size: 14px; display: flex; flex-wrap: wrap; gap: 8px 20px; justify-content: space-between; }
footer a { color: var(--muted); }
.doc { max-width: 720px; padding: 24px 0 56px; }
.doc h1 { font-size: 36px; letter-spacing: -0.02em; margin: 16px 0 4px; }
.doc .date { color: var(--muted); margin: 0 0 28px; }
.doc h2 { font-size: 21px; margin: 32px 0 8px; }
.doc li { margin: 4px 0; }