:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --navy: #1e3a5f;
  --ink: #0f172a;
  --muted: #64748b;
  --faint: #94a3b8;
  --line: #e2e8f0;
  --sky: #0ea5e9;
  --sky-soft: #bae6fd;
  --amber: #d97706;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 1060px; margin: 0 auto; padding: 0 24px; }

a { color: var(--sky); text-decoration: none; }
a:hover { text-decoration: underline; }

header {
  position: sticky; top: 0; z-index: 10;
  background: rgba(248, 250, 252, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 1.15rem; color: var(--navy);
  letter-spacing: -0.01em;
}
.brand:hover { text-decoration: none; }
.brand-logo { display: block; height: 30px; width: auto; }
.nav-links { display: flex; align-items: center; gap: 26px; font-size: 0.95rem; }
.nav-links a { color: var(--muted); }
.nav-links a:hover { color: var(--navy); text-decoration: none; }
.btn {
  display: inline-block; padding: 10px 22px; border-radius: 8px;
  font-weight: 600; font-size: 0.95rem; line-height: 1.4;
}
.btn-primary { background: var(--navy); color: #fff; }
.btn-primary:hover { background: #16304f; text-decoration: none; }
.btn-ghost { border: 1px solid var(--line); color: var(--navy); background: var(--surface); }
.btn-ghost:hover { border-color: var(--faint); text-decoration: none; }

.hero { padding: 88px 0 64px; }
.eyebrow {
  display: inline-block; font-size: 0.8rem; font-weight: 600;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--sky); background: rgba(14, 165, 233, 0.08);
  border: 1px solid var(--sky-soft); border-radius: 999px;
  padding: 4px 14px; margin-bottom: 22px;
}
h1 {
  font-size: clamp(2rem, 5vw, 3.1rem);
  line-height: 1.15; letter-spacing: -0.02em;
  color: var(--navy); max-width: 780px;
}
.hero p.lede {
  margin: 22px 0 34px; font-size: 1.15rem; color: var(--muted);
  max-width: 640px;
}
.hero-ctas { display: flex; gap: 14px; flex-wrap: wrap; }

.stats {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px;
  background: var(--line); border: 1px solid var(--line);
  border-radius: 12px; overflow: hidden; margin: 56px 0 0;
}
.stat { background: var(--surface); padding: 26px 22px; text-align: center; }
.stat b { display: block; font-size: 1.9rem; color: var(--navy); letter-spacing: -0.02em; }
.stat span { font-size: 0.9rem; color: var(--muted); }

section { padding: 72px 0; }
section.alt { background: var(--surface); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.kicker {
  font-size: 0.8rem; font-weight: 600; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--sky); margin-bottom: 10px;
}
h2 {
  font-size: clamp(1.5rem, 3.5vw, 2.1rem); color: var(--navy);
  letter-spacing: -0.015em; margin-bottom: 14px;
}
.section-lede { color: var(--muted); max-width: 620px; margin-bottom: 40px; }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: 12px; padding: 26px;
}
section.alt .card { background: var(--bg); }
.card .num {
  font-size: 0.85rem; font-weight: 700; color: var(--faint);
  letter-spacing: 0.06em; margin-bottom: 12px;
}
.card h3 { font-size: 1.1rem; color: var(--navy); margin-bottom: 8px; }
.card p { font-size: 0.95rem; color: var(--muted); }

.note { margin-top: 30px; font-size: 0.95rem; color: var(--faint); max-width: 620px; }

.panel {
  background: var(--navy); color: #e2e8f0; border-radius: 14px;
  padding: 46px 40px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 30px; flex-wrap: wrap;
}
.panel h2 { color: #fff; margin-bottom: 8px; }
.panel p { color: #cbd5e1; max-width: 520px; }
.panel .btn-light { background: #fff; color: var(--navy); }
.panel .btn-light:hover { background: #f1f5f9; text-decoration: none; }

.bridge {
  border: 1px dashed var(--faint); border-radius: 12px;
  padding: 30px 32px; margin-top: 26px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px; flex-wrap: wrap; background: var(--surface);
}
.bridge p { color: var(--muted); max-width: 560px; }
.bridge b { color: var(--navy); }

footer { border-top: 1px solid var(--line); padding: 40px 0 48px; font-size: 0.9rem; color: var(--faint); }
.foot { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.foot-links { display: flex; gap: 22px; flex-wrap: wrap; }
.foot-links a { color: var(--muted); }

.legal { padding: 64px 0 80px; max-width: 760px; }
.legal h1 { font-size: 2rem; margin-bottom: 6px; }
.legal .updated { color: var(--faint); font-size: 0.9rem; margin-bottom: 36px; }
.legal h2 { font-size: 1.25rem; margin: 34px 0 10px; }
.legal p, .legal li { color: var(--muted); font-size: 0.97rem; }
.legal ul { padding-left: 22px; margin: 10px 0; }

@media (max-width: 800px) {
  .nav-links { display: none; }
  .stats, .cards { grid-template-columns: 1fr; }
  .hero { padding: 60px 0 48px; }
  section { padding: 56px 0; }
  .panel { padding: 34px 26px; }
}

.legal-toc {
  background: var(--surface); border: 1px solid var(--line); border-radius: 12px;
  padding: 22px 26px; margin: 0 0 36px;
}
.legal-toc b { display: block; color: var(--navy); margin-bottom: 8px; font-size: 0.95rem; }
.legal-toc ol { padding-left: 20px; columns: 2; column-gap: 40px; }
.legal-toc li { font-size: 0.92rem; margin: 3px 0; }
.legal-card {
  background: var(--surface); border: 1px solid var(--line); border-radius: 12px;
  padding: 20px 24px; margin: 14px 0;
}
.legal-card h3 { color: var(--navy); font-size: 1.05rem; margin-bottom: 8px; }
.legal-note {
  background: rgba(14, 165, 233, 0.06); border: 1px solid var(--sky-soft);
  border-radius: 10px; padding: 14px 18px; margin: 14px 0; font-size: 0.95rem;
  color: var(--muted);
}
.legal-warn {
  background: rgba(217, 119, 6, 0.06); border: 1px solid #fcd34d;
  border-radius: 10px; padding: 14px 18px; margin: 14px 0; font-size: 0.95rem;
  color: var(--muted);
}
.legal h3 { font-size: 1.05rem; color: var(--navy); margin: 20px 0 6px; }
.legal-divider { border: 0; border-top: 2px solid var(--line); margin: 56px 0; }
@media (max-width: 800px) { .legal-toc ol { columns: 1; } }

.docs-layout { display: grid; grid-template-columns: 230px 1fr; gap: 0; }
.docs-side {
  position: sticky; top: 64px; align-self: start;
  height: calc(100vh - 64px); overflow-y: auto;
  padding: 24px 0; border-right: 1px solid var(--line);
  font-size: 0.85rem;
}
.docs-side .grp {
  padding: 14px 18px 4px; font-size: 0.7rem; font-weight: 600;
  color: var(--faint); text-transform: uppercase; letter-spacing: 0.08em;
}
.docs-side a {
  display: block; padding: 5px 18px; color: var(--muted);
  border-left: 2px solid transparent;
}
.docs-side a:hover { color: var(--navy); text-decoration: none; }
.docs-side .ver {
  margin: 18px 18px 0; padding-top: 14px; border-top: 1px solid var(--line);
  font-size: 0.72rem; color: var(--faint);
}
.docs-main { padding: 8px 0 100px 40px; min-width: 0; }
.docs-main h1 { font-size: 1.7rem; margin: 26px 0 8px; }
.docs-main h2 {
  font-size: 1.3rem; margin: 46px 0 12px; padding-top: 12px;
  border-top: 1px solid var(--line);
}
.docs-main h3 { font-size: 1rem; color: var(--navy); margin: 20px 0 8px; }
.docs-main p { color: var(--muted); font-size: 0.92rem; margin-bottom: 14px; max-width: 640px; }
.docs-main ul { color: var(--muted); font-size: 0.92rem; padding-left: 22px; margin-bottom: 14px; }
.doc-row { display: grid; grid-template-columns: minmax(0,1fr) minmax(0,1fr); gap: 30px; align-items: start; }
.doc-row .sticky-col { position: sticky; top: 84px; }
.endpoint {
  display: flex; align-items: center; gap: 8px; padding: 9px 13px;
  background: #f1f5f9; border: 1px solid var(--line); border-radius: 8px;
  margin-bottom: 14px; overflow-x: auto; white-space: nowrap;
  font-family: Consolas, "Courier New", monospace; font-size: 0.8rem;
}
.endpoint .m {
  padding: 2px 8px; border-radius: 4px; font-weight: 700; font-size: 0.75rem;
  color: #059669; background: rgba(5,150,105,0.08);
}
.endpoint .b { color: var(--faint); }
.endpoint .p { color: var(--ink); font-weight: 600; }
.code {
  margin: 0 0 14px; border: 1px solid var(--line); border-radius: 8px;
  overflow: hidden; background: #f1f5f9;
}
.code .t {
  display: block; padding: 7px 13px; background: var(--line);
  font-size: 0.75rem; color: var(--muted);
}
.code pre {
  margin: 0; padding: 13px; overflow-x: auto; font-size: 0.76rem;
  line-height: 1.6; font-family: Consolas, "Courier New", monospace;
  color: var(--ink);
}
.ptable { overflow-x: auto; margin-bottom: 20px; }
.ptable table { width: 100%; border-collapse: collapse; font-size: 0.82rem; }
.ptable th {
  text-align: left; padding: 7px 10px; color: var(--faint); font-weight: 600;
  font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.05em;
  border-bottom: 1px solid var(--line);
}
.ptable td { padding: 7px 10px; border-bottom: 1px solid var(--line); color: var(--muted); vertical-align: top; }
.ptable td:first-child { font-family: Consolas, monospace; font-size: 0.78rem; color: var(--ink); white-space: nowrap; }
.ptable td:nth-child(2) { font-family: Consolas, monospace; font-size: 0.78rem; color: #7c3aed; }
.ptable td:nth-child(3) { font-family: Consolas, monospace; font-size: 0.78rem; color: var(--faint); }
.ptable .req { color: #dc2626; font-size: 0.65rem; font-weight: 700; margin-left: 5px; }
.chg {
  margin-bottom: 18px; padding: 14px 18px; border-radius: 8px;
  background: var(--surface); border: 1px solid var(--line);
}
.chg b { font-family: Consolas, monospace; color: var(--ink); margin-right: 10px; }
.chg span { font-size: 0.78rem; color: var(--faint); }
.chg ul { margin: 8px 0 0; }
@media (max-width: 900px) {
  .docs-layout { grid-template-columns: 1fr; }
  .docs-side { display: none; }
  .docs-main { padding-left: 0; }
  .doc-row { grid-template-columns: 1fr; }
  .doc-row .sticky-col { position: static; }
}