:root {
  --bg: #ffffff;
  --fg: #101114;
  --muted: #5c6270;
  --line: #e4e6eb;
  --brand: #0d0d0d;
  --accent: #16a34a;
  --card: #f7f8fa;
  --maxw: 960px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
}

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- header ---------- */
header {
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}
.nav {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
}
.brand {
  font-weight: 700;
  font-size: 20px;
  letter-spacing: -0.02em;
  color: var(--fg);
  text-decoration: none;
  margin-right: auto;
}
.brand span { color: var(--accent); }
.nav a.link {
  color: var(--muted);
  text-decoration: none;
  font-size: 15px;
}
.nav a.link:hover { color: var(--fg); }
.btn {
  display: inline-block;
  background: var(--brand);
  color: #fff;
  text-decoration: none;
  padding: 9px 18px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
}
.btn:hover { opacity: .88; }

/* ---------- hero ---------- */
.hero { padding: 72px 0 56px; }
.hero h1 {
  font-size: 42px;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin: 0 0 20px;
  max-width: 18ch;
}
.hero p.lead {
  font-size: 20px;
  color: var(--muted);
  margin: 0 0 32px;
  max-width: 60ch;
}

/* ---------- sections ---------- */
section { padding: 48px 0; border-top: 1px solid var(--line); }
section h2 {
  font-size: 26px;
  letter-spacing: -0.02em;
  margin: 0 0 12px;
}
section h3 {
  font-size: 18px;
  margin: 28px 0 8px;
}
section p { color: var(--fg); margin: 0 0 16px; max-width: 72ch; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
  margin-top: 28px;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 22px;
}
.card h3 { margin: 0 0 8px; font-size: 17px; }
.card p { margin: 0; color: var(--muted); font-size: 15.5px; }

ul.plain { padding-left: 22px; margin: 0 0 16px; max-width: 72ch; }
ul.plain li { margin-bottom: 8px; }

.channels {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
  padding: 0;
  list-style: none;
}
.channels li {
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 999px;
  padding: 7px 16px;
  font-size: 15px;
  color: var(--muted);
}

/* ---------- legal docs ---------- */
.doc { padding: 56px 0 24px; }
.doc h1 { font-size: 32px; letter-spacing: -0.02em; margin: 0 0 8px; }
.doc .updated { color: var(--muted); font-size: 15px; margin: 0 0 40px; }
.doc h2 {
  font-size: 20px;
  margin: 40px 0 10px;
  padding-top: 0;
  border: 0;
}
.doc p, .doc li { max-width: 72ch; }
.doc table {
  border-collapse: collapse;
  width: 100%;
  max-width: 72ch;
  margin: 16px 0 24px;
  font-size: 15.5px;
}
.doc th, .doc td {
  border: 1px solid var(--line);
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
}
.doc th { background: var(--card); font-weight: 600; }

a { color: #1155cc; }

.note {
  background: var(--card);
  border-left: 3px solid var(--accent);
  border-radius: 0 8px 8px 0;
  padding: 16px 20px;
  margin: 24px 0;
}
.note p { margin: 0; }

/* ---------- footer ---------- */
footer {
  border-top: 1px solid var(--line);
  padding: 36px 0 56px;
  color: var(--muted);
  font-size: 15px;
}
footer a { color: var(--muted); }
footer .fnav { display: flex; flex-wrap: wrap; gap: 20px; margin-bottom: 16px; }

@media (max-width: 640px) {
  body { font-size: 16px; }
  .hero { padding: 48px 0 36px; }
  .hero h1 { font-size: 32px; }
  .hero p.lead { font-size: 18px; }
  .brand { margin-right: 0; width: 100%; }
}