:root {
  --bg: #fbfbf9;
  --fg: #16181d;
  --muted: #5d6370;
  --line: #e4e4de;
  --card: #ffffff;
  --accent: #0f7b6c;
  --accent-soft: #e3f3ef;
  --maxw: 880px;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Helvetica, Arial, sans-serif;
}

a {
  color: var(--accent);
}

.top {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 22px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--fg);
  text-decoration: none;
  font-weight: 650;
  font-size: 20px;
  letter-spacing: -0.01em;
}

.mark {
  width: 28px;
  height: 28px;
  color: var(--accent);
}

.pill {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 4px 11px;
}

main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px 48px;
}

.hero {
  padding: 56px 0 36px;
}

.hero h1 {
  margin: 0 0 18px;
  font-size: clamp(30px, 5vw, 44px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  max-width: 20ch;
}

.lede {
  margin: 0;
  max-width: 60ch;
  font-size: 19px;
  color: var(--muted);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
  margin: 12px 0 44px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 22px 22px 18px;
}

.card h2 {
  margin: 0 0 10px;
  font-size: 19px;
}

.card p {
  margin: 0 0 12px;
  color: var(--muted);
}

.status {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
}

.how h2 {
  font-size: 22px;
  margin: 0 0 14px;
}

.how ol {
  margin: 0;
  padding-left: 22px;
}

.how li {
  margin-bottom: 12px;
  color: var(--muted);
}

.how li strong {
  color: var(--fg);
}

.doc {
  padding-top: 24px;
  max-width: 720px;
}

.doc h1 {
  font-size: 34px;
  letter-spacing: -0.02em;
  margin: 0 0 6px;
}

.doc h2 {
  font-size: 20px;
  margin: 30px 0 8px;
}

.doc .meta {
  color: var(--muted);
  margin: 0 0 24px;
}

.doc ul {
  padding-left: 22px;
}

.doc li {
  margin-bottom: 8px;
}

footer {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 24px 20px 40px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

footer p {
  margin: 0 0 8px;
}

.fine {
  font-size: 12.5px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111317;
    --fg: #ececea;
    --muted: #a3a8b3;
    --line: #2a2e36;
    --card: #181b21;
    --accent: #4fd1b8;
    --accent-soft: #163a35;
  }
}