:root {
  --ink: #17181c;
  --muted: #5d6270;
  --line: #e5e7eb;
  --bg: #ffffff;
  --soft: #f7f8fa;
  --accent: #1a5cff;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
.wrap { max-width: 760px; margin: 0 auto; padding: 0 20px; }
header.top {
  border-bottom: 1px solid var(--line);
  padding: 18px 0;
  font-weight: 600;
  letter-spacing: -0.01em;
}
header.top a { color: var(--ink); text-decoration: none; }
h1 {
  font-size: 40px;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 48px 0 16px;
}
h2 {
  font-size: 24px;
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin: 44px 0 14px;
}
h3 { font-size: 19px; margin: 28px 0 10px; }
p { margin: 0 0 16px; }
.lead { font-size: 20px; color: var(--muted); }
ul { margin: 0 0 18px; padding-left: 22px; }
li { margin-bottom: 9px; }
.card {
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 22px 24px;
  margin: 24px 0;
}
.price { font-size: 34px; font-weight: 650; letter-spacing: -0.02em; margin: 0 0 4px; }
.price span { font-size: 17px; font-weight: 400; color: var(--muted); }
.btn {
  display: inline-block;
  background: var(--ink);
  color: #fff;
  text-decoration: none;
  padding: 15px 30px;
  border-radius: 12px;
  font-weight: 600;
  margin: 8px 0 4px;
}
.btn:hover { opacity: 0.88; }
.muted { color: var(--muted); }
.small { font-size: 15px; }
footer {
  border-top: 1px solid var(--line);
  margin-top: 64px;
  padding: 28px 0 60px;
  color: var(--muted);
  font-size: 15px;
}
footer a { color: var(--muted); }
.docs a { display: block; margin-bottom: 8px; }
table.req { border-collapse: collapse; width: 100%; font-size: 15px; }
table.req td { padding: 6px 12px 6px 0; vertical-align: top; }
table.req td:first-child { color: var(--muted); white-space: nowrap; }
article { padding-bottom: 20px; }
article h1 { font-size: 30px; }
article h2 { font-size: 20px; margin-top: 34px; }
article p, article li { font-size: 16px; }
.back { display: inline-block; margin: 24px 0 0; font-size: 15px; }
@media (max-width: 520px) {
  h1 { font-size: 31px; margin-top: 34px; }
  .lead { font-size: 18px; }
  body { font-size: 16px; }
}