:root {
  --bg: #ffffff;
  --panel: #f5f7fa;
  --line: #e2e6ec;
  --text: #121821;
  --muted: #5b6673;
  --brand: #0f6fff;
  --brand-dark: #0a52bd;
  --good: #0a7c46;
  --warn: #9a3412;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--text);
  background: var(--bg);
}
a { color: var(--brand); }
main { max-width: 960px; margin: 0 auto; padding: 8px 20px 60px; }
section { margin: 46px 0; }
.narrow { max-width: 620px; }
h1 { font-size: 40px; line-height: 1.15; letter-spacing: -0.03em; margin: 22px 0 12px; }
h2 { font-size: 24px; letter-spacing: -0.02em; margin: 30px 0 10px; }
h3 { font-size: 17px; margin: 0 0 6px; }
.lede { font-size: 19px; color: var(--muted); }
.fine { font-size: 13.5px; color: var(--muted); }

header.site, footer.site { border-bottom: 1px solid var(--line); }
header.site {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  max-width: 960px; margin: 0 auto; padding: 14px 20px;
}
header.site .brand { display: flex; align-items: center; gap: 9px; font-weight: 700; font-size: 18px; color: var(--text); text-decoration: none; letter-spacing: -0.02em; }
header.site nav { display: flex; align-items: center; gap: 18px; font-size: 15px; }
header.site nav a { color: var(--muted); text-decoration: none; }
header.site nav a:hover { color: var(--text); }
header.site nav a.cta { background: var(--brand); color: #fff; padding: 7px 14px; border-radius: 8px; font-weight: 600; }
footer.site { border-bottom: 0; border-top: 1px solid var(--line); margin-top: 50px; }
footer.site p { max-width: 960px; margin: 10px auto; padding: 0 20px; font-size: 13.5px; color: var(--muted); }

.hero { padding-top: 26px; }
.hero h1 { max-width: 16ch; }
.hero .lede { max-width: 58ch; }

.btn {
  display: inline-block; background: var(--brand); color: #fff; text-decoration: none; font-weight: 600;
  border: 1px solid var(--brand); border-radius: 9px; padding: 10px 18px; cursor: pointer; font-size: 16px;
}
.btn:hover { background: var(--brand-dark); }
.btn.big { padding: 13px 24px; font-size: 17px; }
.btn.ghost { background: var(--panel); color: var(--text); border-color: var(--line); }
.btn.disabled { background: var(--panel); color: var(--muted); border-color: var(--line); cursor: default; }

.grid3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 22px; }
.grid3 p { color: var(--muted); font-size: 15px; }
.cards .card { border: 1px solid var(--line); border-radius: 12px; padding: 20px; background: var(--panel); }
.cards .card.highlight { border-color: var(--brand); box-shadow: 0 6px 24px rgba(15, 111, 255, 0.12); background: var(--bg); }
.card .price { font-size: 30px; font-weight: 700; margin: 4px 0 10px; letter-spacing: -0.02em; }
.card .price span { font-size: 15px; font-weight: 400; color: var(--muted); }
.card ul { padding-left: 18px; color: var(--muted); font-size: 15px; }
.card li { margin: 5px 0; }

.faq dt { font-weight: 650; margin-top: 16px; }
.faq dd { margin: 4px 0 0; color: var(--muted); }

.prose h2 { font-size: 20px; }
.prose li { margin: 6px 0; color: var(--muted); }
.prose p { color: var(--muted); }
.prose code { background: var(--panel); border: 1px solid var(--line); border-radius: 5px; padding: 1px 5px; font-size: 14px; }

.ticks { list-style: none; padding: 0; }
.ticks li { padding-left: 26px; position: relative; margin: 8px 0; color: var(--muted); }
.ticks li::before { content: "✓"; position: absolute; left: 4px; color: var(--good); font-weight: 700; }

label { display: block; margin: 14px 0; font-weight: 600; font-size: 15px; }
input {
  display: block; width: 100%; margin-top: 5px; font: inherit; padding: 10px 12px;
  border: 1px solid var(--line); border-radius: 8px; background: var(--bg); color: var(--text);
}
.key { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 24px; letter-spacing: 0.04em; background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; display: inline-block; }
.key.small { font-size: 16px; padding: 4px 8px; }
.ok { background: color-mix(in srgb, var(--good) 12%, transparent); border-left: 3px solid var(--good); padding: 10px 14px; }
.warn { background: color-mix(in srgb, var(--warn) 12%, transparent); border-left: 3px solid var(--warn); padding: 10px 14px; }
table.kv { border-collapse: collapse; width: 100%; margin: 18px 0; }
table.kv th, table.kv td { text-align: left; padding: 9px 4px; border-bottom: 1px solid var(--line); font-size: 15px; }
table.kv th { color: var(--muted); font-weight: 500; width: 40%; }

@media (prefers-color-scheme: dark) {
  :root { --bg: #11151b; --panel: #191f27; --line: #29313b; --text: #e9edf3; --muted: #9aa5b2; --brand: #4c93ff; --brand-dark: #2f7ae6; --good: #48c78e; --warn: #e08c4a; }
}