:root {
  --bg: #ffffff;
  --fg: #1d1d1f;
  --muted: #6e6e73;
  --line: #e5e5ea;
  --soft: #f5f5f7;
  --link: #0a0a0a;
  --check: #15803D;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", system-ui, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --fg: #f5f5f7;
    --muted: #86868b;
    --line: #26262a;
    --soft: #111113;
    --link: #f5f5f7;
    --check: #4ADE80;
  }
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--link); text-decoration: underline; text-underline-offset: 2px; }
a:focus-visible { outline: 2px solid var(--fg); outline-offset: 3px; border-radius: 3px; }

.top {
  max-width: 760px; margin: 0 auto; padding: 22px 24px;
  display: flex; justify-content: space-between; align-items: center;
}
.top .logo { color: var(--fg); text-decoration: none; display: inline-flex; }
.top .logo .wordmark { height: 24px; width: auto; display: block; }
.top nav a { color: var(--muted); text-decoration: none; font-size: 14px; margin-left: 18px; }
.top nav a:hover { color: var(--fg); }

main { max-width: 760px; margin: 0 auto; padding: 32px 24px 80px; }
h1 { font-size: clamp(32px, 6vw, 44px); line-height: 1.1; letter-spacing: -0.035em; font-weight: 700; }
.meta { margin-top: 10px; color: var(--muted); font-size: 14px; }
.lead { margin-top: 20px; font-size: 18px; color: var(--muted); }
h2 { margin-top: 44px; font-size: 22px; letter-spacing: -0.02em; font-weight: 650; }
h3 { margin-top: 28px; font-size: 17px; font-weight: 650; }
p, ul, ol, table, .note { margin-top: 14px; }
ul, ol { padding-left: 22px; }
li { margin-top: 6px; }
strong { font-weight: 650; }
.note {
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px 18px;
}
.caps { text-transform: uppercase; font-size: 14px; letter-spacing: 0.01em; }
table { width: 100%; border-collapse: collapse; font-size: 15px; }
th, td { text-align: left; vertical-align: top; padding: 10px 12px 10px 0; border-bottom: 1px solid var(--line); }
th { font-weight: 650; }
.toc { margin-top: 24px; padding: 16px 18px; border: 1px solid var(--line); border-radius: 14px; font-size: 15px; }
.toc ol { margin-top: 6px; }
.credit { margin-top: 48px; font-size: 13px; color: var(--muted); }

.plans { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 28px; }
.plan { border: 1px solid var(--line); border-radius: 18px; padding: 20px; }
.plan h3 { margin-top: 0; }
.price { margin-top: 6px; font-size: 30px; font-weight: 700; letter-spacing: -0.03em; }
.price small { font-size: 14px; font-weight: 500; color: var(--muted); letter-spacing: 0; }
.plan ul { padding-left: 18px; font-size: 15px; }
@media (max-width: 640px) { .plans { grid-template-columns: 1fr; } }

footer.site {
  border-top: 1px solid var(--line);
  max-width: 760px; margin: 0 auto; padding: 24px 24px 40px;
  font-size: 13px; color: var(--muted);
}
footer.site nav { display: flex; flex-wrap: wrap; gap: 6px 16px; margin-bottom: 12px; }
footer.site a { color: var(--muted); text-decoration: none; }
footer.site a:hover { color: var(--fg); text-decoration: underline; }