:root {
  --ground: #ffffff; --band: #f5f7fa; --ink: #141b24; --muted: #566170; --faint: #8a94a1; --line: #e1e6ec;
  --accent: #1f5f99; --accent-ink: #ffffff; --accent-soft: #e8f1f9; --dark: #18212c; --dark-ink: #e7edf3; --dark-muted: #a7b3c0;
  --sans: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ground: #10161d; --band: #151c24; --ink: #e5ebf1; --muted: #a2adba; --faint: #7a8593; --line: #25303c;
    --accent: #79b3e6; --accent-ink: #0e1a26; --accent-soft: #1a2a3a; --dark: #0b1016; --dark-ink: #e5ebf1; --dark-muted: #9aa7b5;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body { margin: 0; background: var(--ground); color: var(--ink); font: 16px/1.6 var(--sans); }
a { color: var(--accent); }
.wrap { max-width: 1160px; margin: 0 auto; padding: 0 24px; }
header.top { border-bottom: 1px solid var(--line); background: var(--ground); position: sticky; top: 0; z-index: 2; }
header.top .wrap { display: flex; align-items: center; gap: 28px; height: 62px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; color: var(--ink); text-decoration: none; letter-spacing: -.01em; }
.logo svg { width: 26px; height: 26px; }
nav.main { display: flex; gap: 22px; margin-left: auto; font-size: 14.5px; }
nav.main a { color: var(--muted); text-decoration: none; }
nav.main a:hover { color: var(--ink); }
.lang { font-size: 13px; font-weight: 600; border: 1px solid var(--line); border-radius: 6px; padding: 4px 9px; text-decoration: none; color: var(--muted); }
.lang:hover { color: var(--ink); }
.hero { padding: 84px 0 72px; }
.hero h1 { font-size: clamp(32px, 4.6vw, 52px); line-height: 1.1; letter-spacing: -.025em; margin: 0 0 20px; max-width: 18ch; text-wrap: balance; }
.hero p.lead { font-size: 19px; color: var(--muted); max-width: 60ch; margin: 0 0 32px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; }
.button { display: inline-block; padding: 11px 20px; border-radius: 7px; font-weight: 600; font-size: 15px; text-decoration: none; border: 1px solid var(--line); color: var(--ink); background: var(--ground); }
.button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.button:hover { filter: brightness(1.05); }
.button:focus-visible, nav.main a:focus-visible, .lang:focus-visible, .logo:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
section.band { background: var(--band); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
section { padding: 72px 0; }
h2 { font-size: 28px; letter-spacing: -.015em; margin: 0 0 10px; }
.intro { color: var(--muted); max-width: 62ch; margin: 0 0 36px; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.grid > div { background: var(--ground); padding: 24px 22px; }
section.band .grid > div { background: var(--ground); }
.grid h3 { font-size: 16.5px; margin: 0 0 6px; }
.grid p { margin: 0; color: var(--muted); font-size: 14.5px; }
.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 28px; counter-reset: step; }
.steps li { counter-increment: step; }
.steps li::before { content: counter(step); display: grid; place-items: center; width: 32px; height: 32px; border-radius: 50%; background: var(--accent-soft); color: var(--accent); font-weight: 700; margin-bottom: 12px; }
.steps h3 { margin: 0 0 6px; font-size: 16.5px; }
.steps p { margin: 0; color: var(--muted); font-size: 14.5px; }
.facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(380px, 100%), 1fr)); gap: 14px 40px; margin: 0; }
.facts div { border-top: 1px solid var(--line); padding-top: 14px; }
.facts dt { font-weight: 600; margin-bottom: 4px; }
.facts dd { margin: 0; color: var(--muted); font-size: 14.5px; }
.signin { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-top: 8px; }
.signin input { font: inherit; padding: 10px 12px; border: 1px solid var(--line); border-radius: 7px; background: var(--ground); color: var(--ink); width: 220px; }
.signin span { color: var(--muted); }
footer { padding: 36px 0 48px; color: var(--faint); font-size: 14px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 12px 28px; justify-content: space-between; }
footer a { color: var(--muted); }
.docs-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(320px, 100%), 1fr)); gap: 18px; }
.card { border: 1px solid var(--line); border-radius: 10px; padding: 24px; }
.card h2 { font-size: 20px; }
.card p { color: var(--muted); }
@media (max-width: 760px) {
  nav.main { display: none; }
  header.top .wrap { justify-content: space-between; }
  .hero { padding: 52px 0 44px; }
  section { padding: 52px 0; }
}