/* REA light Apple theme */
:root {
  --bg: #f5f5f7;
  --surface: #ffffff;
  --ink: #1d1d1f;
  --muted: #6e6e73;
  --line: rgba(0, 0, 0, 0.08);
  --blue: #0071e3;
  --blue-hover: #0077ed;
  --ok: #248a3d;
  --max: 1080px;
  --radius: 22px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--surface);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.47;
  letter-spacing: -0.011em;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 22px; }
header {
  position: sticky; top: 0; z-index: 40;
  background: rgba(251, 251, 253, 0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 52px; }
.brand {
  display: flex; align-items: center; gap: 10px;
  color: var(--ink); font-weight: 600; letter-spacing: -0.02em;
  text-decoration: none; white-space: nowrap;
}
.brand:hover { text-decoration: none; }
.brand img, .logo-img { height: 28px; width: auto; display: block; }
.lockup { display: block; height: 56px; width: auto; margin: 0 0 28px; }
.brand .product { font-weight: 500; color: var(--muted); }
.links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 6px 18px; font-size: 12px; }
.links a { color: var(--ink); text-decoration: none; opacity: 0.8; }
.links a:hover, .links a.active { opacity: 1; text-decoration: none; }
main { padding-bottom: 24px; }
.hero { padding: 72px 0 28px; }
.eyebrow {
  margin: 0 0 14px; color: var(--muted); font-size: 12px; font-weight: 600;
  letter-spacing: 0.14em; text-transform: uppercase;
}
h1 { margin: 0 0 18px; font-size: clamp(36px, 7vw, 64px); line-height: 1.05; letter-spacing: -0.035em; font-weight: 600; }
.lede { max-width: 640px; margin: 0 0 28px; color: var(--muted); font-size: 21px; line-height: 1.4; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 44px; padding: 10px 18px; border-radius: 980px;
  background: var(--blue); color: #fff; font-size: 15px; font-weight: 500;
  text-decoration: none; border: 1px solid transparent;
}
.btn:hover { background: var(--blue-hover); text-decoration: none; }
.btn.ghost { background: transparent; color: var(--blue); border-color: rgba(0, 113, 227, 0.28); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 36px 0 0; }
.chip { border: 1px solid var(--line); background: var(--bg); color: var(--muted); border-radius: 980px; padding: 6px 12px; font-size: 12px; }
.chip.on { color: var(--ok); background: #f1faf3; border-color: rgba(36, 138, 61, 0.18); }
section { padding: 36px 0 8px; }
h2 { margin: 0 0 16px; font-size: 28px; letter-spacing: -0.03em; font-weight: 600; }
h3 { margin: 22px 0 8px; font-size: 19px; letter-spacing: -0.02em; font-weight: 600; }
p { color: var(--muted); }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.card { background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 20px; }
.card h3 { margin-top: 0; }
.card p { margin: 0; font-size: 15px; }
pre, code { font-family: "SF Mono", ui-monospace, Menlo, Consolas, monospace; }
code { font-size: 0.88em; color: var(--ink); }
pre {
  background: #f5f5f7; border: 1px solid var(--line); border-radius: 16px;
  padding: 16px 18px; overflow-x: auto; font-size: 13px; color: var(--ink); line-height: 1.5;
}
.diagram {
  background: #f5f5f7; border: 1px solid var(--line); border-radius: 16px;
  padding: 18px; overflow-x: auto; font-size: 13px; line-height: 1.45;
  color: var(--ink); white-space: pre; font-family: "SF Mono", ui-monospace, Menlo, Consolas, monospace;
}
table { width: 100%; border-collapse: collapse; font-size: 15px; margin: 8px 0; }
th, td { text-align: left; padding: 14px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; }
td { color: var(--ink); }
.note { margin: 22px 0 0; padding: 16px 18px; border-radius: 16px; background: var(--bg); color: var(--muted); font-size: 15px; }
ol { color: var(--muted); padding-left: 20px; }
ol li { margin: 8px 0; }
.band { background: var(--bg); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); margin: 28px 0 0; padding: 48px 0; }
footer { margin-top: 64px; padding: 28px 0 48px; border-top: 1px solid var(--line); background: var(--bg); color: var(--muted); font-size: 13px; }
.foot { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
@media (max-width: 720px) {
  .hero { padding-top: 40px; }
  .lede { font-size: 18px; }
  .links { font-size: 12px; gap: 8px 12px; }
  h2 { font-size: 24px; }
}

.legal {
  margin: 14px 0 0;
  max-width: 820px;
  font-size: 11px;
  line-height: 1.45;
  color: #86868b;
}