:root {
  --accent: #0f3fe0;
  --accent-soft: #e8edfd;
  --ink: #101828;
  --muted: #475467;
  --line: #e4e7ec;
  --bg: #ffffff;
  --bg-alt: #f6f8fc;
  --radius: 14px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  font-size: 16px;
}

a { color: var(--accent); }

.wrap { max-width: 1040px; margin: 0 auto; padding: 0 20px; }

header.site {
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}
header.site .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 64px;
  flex-wrap: wrap;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 18px;
  color: var(--ink);
  text-decoration: none;
}
.brand-mark {
  width: 32px;
  height: 32px;
  border-radius: 9px;
  background: var(--accent);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 17px;
}
nav.site { display: flex; gap: 18px; flex-wrap: wrap; font-size: 14px; }
nav.site a { color: var(--muted); text-decoration: none; }
nav.site a:hover { color: var(--ink); }

.hero { padding: 72px 0 56px; background: linear-gradient(180deg, var(--accent-soft), var(--bg)); }
.hero h1 { font-size: clamp(30px, 5vw, 46px); line-height: 1.15; margin: 0 0 16px; letter-spacing: -0.02em; }
.hero p.lead { font-size: 19px; color: var(--muted); max-width: 680px; margin: 0 0 28px; }
.channels { display: flex; gap: 10px; flex-wrap: wrap; }
.chip {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 14px;
  font-weight: 600;
}

section { padding: 56px 0; }
section.alt { background: var(--bg-alt); }
h2 { font-size: 28px; margin: 0 0 10px; letter-spacing: -0.01em; }
p.section-lead { color: var(--muted); margin: 0 0 32px; max-width: 680px; }

.grid { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
}
.card h3 { margin: 0 0 8px; font-size: 17px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }

ol.steps { padding-left: 22px; margin: 0; }
ol.steps li { margin-bottom: 12px; }

.legal-box {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  font-size: 15px;
}
.legal-box dl { margin: 0; display: grid; grid-template-columns: max-content 1fr; gap: 6px 18px; }
.legal-box dt { font-weight: 700; }
.legal-box dd { margin: 0; color: var(--muted); }

main.doc { padding: 48px 0 64px; }
main.doc .wrap { max-width: 780px; }
main.doc h1 { font-size: 34px; margin: 0 0 6px; letter-spacing: -0.01em; }
main.doc .updated { color: var(--muted); font-size: 14px; margin: 0 0 32px; }
main.doc h2 { font-size: 21px; margin: 36px 0 10px; }
main.doc li { margin-bottom: 6px; }

footer.site {
  border-top: 1px solid var(--line);
  padding: 32px 0;
  font-size: 14px;
  color: var(--muted);
}
footer.site .wrap { display: flex; justify-content: space-between; gap: 18px; flex-wrap: wrap; }
footer.site nav { display: flex; gap: 16px; flex-wrap: wrap; }

@media (max-width: 560px) {
  .legal-box dl { grid-template-columns: 1fr; }
  .legal-box dt { margin-top: 8px; }
}