:root {
  --bg: #f8f4ec;
  --card: #ffffff;
  --ink: #1d2421;
  --quiet: #5b6661;
  --brand: #2f5d50;
  --brand-ink: #ffffff;
  --accent: #e8643c;
  --line: #e4ddcf;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #151917;
    --card: #1f2522;
    --ink: #eef1ef;
    --quiet: #a7b2ad;
    --brand: #9ccfbe;
    --brand-ink: #0e2a22;
    --accent: #ffb59c;
    --line: #2f3833;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.55 -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
main { max-width: 640px; margin: 0 auto; padding: 32px 16px 48px; }
header.top { display: flex; align-items: center; gap: 12px; margin-bottom: 28px; }
header.top img { width: 44px; height: 44px; border-radius: 12px; }
header.top a { color: var(--ink); text-decoration: none; font-weight: 700; font-size: 19px; }
h1 { font-size: 30px; line-height: 1.2; margin: 0 0 12px; letter-spacing: -0.01em; }
h2 { font-size: 21px; margin: 36px 0 12px; }
p { margin: 0 0 14px; }
.lead { font-size: 19px; color: var(--quiet); }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 20px;
  margin: 20px 0;
}
.btn {
  display: block;
  text-align: center;
  padding: 15px 18px;
  border-radius: 14px;
  font-weight: 700;
  font-size: 18px;
  text-decoration: none;
  margin: 12px 0;
}
.btn.primary { background: var(--brand); color: var(--brand-ink); }
.btn.secondary { border: 2px solid var(--brand); color: var(--brand); }
.code {
  font: 700 34px/1.2 ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  letter-spacing: 0.06em;
  text-align: center;
  margin: 6px 0 4px;
}
ol.steps { padding-left: 22px; margin: 0; }
ol.steps li { margin: 0 0 10px; }
.quiet { color: var(--quiet); font-size: 15px; }
a { color: var(--brand); }
footer { margin-top: 40px; padding-top: 16px; border-top: 1px solid var(--line); font-size: 14px; color: var(--quiet); }
footer a { color: var(--quiet); }
.privacy h2 { font-size: 18px; margin-top: 26px; }
.privacy li { margin-bottom: 6px; }