:root {
  --ink: #16181d;
  --ink-soft: #4a4f5a;
  --paper: #ffffff;
  --paper-soft: #f5f6f8;
  --brand: #2563eb;
  --brand-deep: #1e40af;
  --ok: #047857;
  --warn: #b45309;
  --line: #e3e6ea;
  --radius: 12px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
  font-size: 17px;
}
header.site {
  display: flex; align-items: center; justify-content: space-between;
  max-width: 980px; margin: 0 auto; padding: 18px 20px;
}
header.site .logo { font-weight: 800; font-size: 19px; color: var(--ink); text-decoration: none; letter-spacing: -0.02em; }
header.site .logo span { color: var(--brand); }
header.site nav a { color: var(--ink-soft); text-decoration: none; margin-left: 22px; font-size: 15px; font-weight: 500; }
header.site nav a:hover { color: var(--brand); }
main { max-width: 980px; margin: 0 auto; padding: 0 20px 80px; }
.hero { padding: 56px 0 40px; max-width: 760px; }
h1 { font-size: 42px; line-height: 1.12; letter-spacing: -0.025em; margin: 0 0 18px; }
.hero p.lead { font-size: 21px; color: var(--ink-soft); margin: 0 0 28px; }
h2 { font-size: 28px; letter-spacing: -0.02em; margin: 56px 0 14px; }
h3 { font-size: 20px; margin: 32px 0 10px; }
p, li { color: var(--ink); }
a { color: var(--brand); }
.cta-row { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }
.btn {
  display: inline-block; background: var(--brand); color: #fff; text-decoration: none;
  padding: 13px 24px; border-radius: 10px; font-weight: 700; font-size: 16px;
}
.btn:hover { background: var(--brand-deep); }
.btn.ghost { background: transparent; color: var(--brand); border: 1.5px solid var(--brand); }
.note { font-size: 14px; color: var(--ink-soft); }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 18px; margin: 26px 0; }
.card {
  background: var(--paper-soft); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 22px;
}
.card h3 { margin-top: 0; }
.card p { margin-bottom: 0; color: var(--ink-soft); font-size: 15.5px; }
.steps { counter-reset: step; list-style: none; padding: 0; margin: 26px 0; }
.steps li { counter-increment: step; display: flex; gap: 16px; margin-bottom: 18px; align-items: baseline; }
.steps li::before {
  content: counter(step);
  background: var(--brand); color: #fff; font-weight: 800; font-size: 15px;
  min-width: 30px; height: 30px; border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  position: relative; top: 4px;
}
table { width: 100%; border-collapse: collapse; margin: 24px 0; font-size: 15px; }
th, td { text-align: left; padding: 11px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { background: var(--paper-soft); font-size: 13.5px; text-transform: uppercase; letter-spacing: 0.04em; color: var(--ink-soft); }
tr td:first-child { font-weight: 600; }
.good { color: var(--ok); font-weight: 600; }
.bad { color: var(--warn); font-weight: 600; }
blockquote {
  border-left: 4px solid var(--brand); margin: 24px 0; padding: 6px 20px;
  background: var(--paper-soft); border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--ink-soft); font-style: italic;
}
.updated { font-size: 14px; color: var(--ink-soft); margin-bottom: 30px; }
footer.site {
  border-top: 1px solid var(--line); margin-top: 40px;
  padding: 30px 20px 50px; text-align: center; color: var(--ink-soft); font-size: 14.5px;
}
footer.site a { color: var(--ink-soft); }
details { border: 1px solid var(--line); border-radius: 10px; padding: 14px 18px; margin-bottom: 12px; }
details summary { font-weight: 650; cursor: pointer; }
details p { margin: 10px 0 2px; color: var(--ink-soft); }
.banner {
  background: var(--paper-soft); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 16px 20px; font-size: 15.5px; color: var(--ink-soft); margin: 30px 0;
}
@media (max-width: 640px) {
  h1 { font-size: 31px; }
  .hero p.lead { font-size: 18px; }
  h2 { font-size: 24px; }
}