/* ============================================================
   CoreAI — engineering paper theme
   warm paper / hairline lines / numbered sections / 3px corners
   ============================================================ */
:root {
  --paper: #f4f5f1;
  --paper-2: #edeef0;
  --card: #fafbf7;
  --ink: #16181a;
  --ink-soft: #3d4240;
  --muted: #687068;
  --line: #dce1d8;
  --line-soft: #e7eae4;
  --signal: #22d3ee;
  --signal-strong: #67e8f9;
  --signal-deep: #0891b2;
  --signal-wash: rgba(34, 211, 238, 0.10);
  --signal-ink: #062a31;
  --dark: #0b0f12;
  --dark-2: #10161b;
  --dark-line: rgba(236, 245, 244, 0.14);
  --dark-line-soft: rgba(236, 245, 244, 0.07);
  --dark-ink: #f3f5ef;
  --dark-muted: #9aa6a3;
  --ok: #3f765e;
  --ok-wash: rgba(63, 118, 94, 0.10);
  --err: #b4473d;
  --err-wash: rgba(180, 71, 61, 0.10);
  --wait: #936722;
  --wait-wash: rgba(147, 103, 34, 0.12);
  --code-bg: #0b0f12;
  --code-fg: #dbe4e2;
  --radius: 3px;
  --shadow-soft: 0 18px 48px -34px rgba(10, 16, 20, 0.35);
  --font: "Public Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font);
  font-size: 15.5px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
::selection { background: var(--signal); color: var(--signal-ink); }
a { color: var(--ink); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; text-decoration-color: rgba(22, 24, 26, 0.28); }
a:hover { color: var(--signal-deep); text-decoration-color: var(--signal-deep); }
code, .mono { font-family: var(--mono); font-size: 0.86em; }
code { background: var(--paper-2); border: 1px solid var(--line-soft); border-radius: 2px; padding: 0.08em 0.35em; }
.dim { color: var(--muted); }
.r { text-align: right; }
.wrap { max-width: 1140px; margin: 0 auto; padding: 0 24px; }
.empty { text-align: center; color: var(--muted); padding: 30px 10px; }

/* ---------- kickers & numbered labels ---------- */
.kicker, .kick {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.kicker::before, .kick::before {
  content: "";
  width: 7px; height: 7px;
  background: var(--signal);
  display: inline-block;
  flex: none;
}
.no {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
}
.no b { color: var(--ink); font-weight: 500; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font);
  font-size: 14px;
  font-weight: 500;
  line-height: 1;
  padding: 0 18px;
  height: 38px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
  white-space: nowrap;
}
.btn-primary { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.btn-primary:hover { background: #000; color: var(--signal-strong); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--ink); color: var(--ink); background: var(--card); }
.btn-danger { background: transparent; color: var(--err); border-color: rgba(180, 71, 61, 0.4); }
.btn-danger:hover { background: var(--err); color: #fff; border-color: var(--err); }
.btn-lg { height: 46px; padding: 0 26px; font-size: 15px; }
.btn-sm { height: 30px; padding: 0 12px; font-size: 13px; }
.link-arrow, .link-plain {
  font-weight: 500;
  color: var(--signal-deep);
  text-decoration: none;
  border-bottom: 1px solid rgba(8, 145, 178, 0.35);
  padding-bottom: 1px;
}
.link-arrow:hover, .link-plain:hover { color: var(--ink); border-color: var(--ink); background: none; }
.link-plain { border: none; padding: 0; }
.link-plain { color: var(--muted); }
.link-plain:hover { color: var(--ink); }

/* ---------- announcement bar ---------- */
.announce {
  background: var(--ink);
  color: var(--paper);
  font-size: 13px;
  padding: 8px 0;
}
.announce .wrap { display: flex; align-items: center; gap: 10px; }
.announce .wrap::before { content: ""; width: 7px; height: 7px; background: var(--signal); flex: none; }

/* ---------- header ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(244, 245, 241, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; gap: 28px; height: 56px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 600; font-size: 16.5px; letter-spacing: -0.01em; }
.brand:hover { color: var(--ink); }
.brand em { font-style: normal; color: var(--muted); font-weight: 400; }
.brand-logo { width: 28px; height: 28px; border-radius: 2px; display: block; }
.nav-links { display: flex; gap: 22px; margin-left: 8px; }
.nav-links a {
  font-size: 13.5px;
  font-weight: 500;
  color: var(--ink-soft);
  text-decoration: none;
  letter-spacing: 0.02em;
}
.nav-links a:hover { color: var(--ink); }
.nav-cta { margin-left: auto; display: flex; gap: 10px; align-items: center; }
.nav-balance { font-size: 13px; color: var(--muted); border: 1px solid var(--line); border-radius: var(--radius); padding: 5px 10px; background: var(--card); }
.nav-toggle { display: none; }
@media (max-width: 900px) {
  .nav-toggle {
    display: flex; flex-direction: column; gap: 4px;
    background: none; border: none; cursor: pointer; padding: 8px;
    margin-left: auto;
  }
  .nav-toggle span { width: 20px; height: 2px; background: var(--ink); display: block; }
  .nav-cta { margin-left: 0; }
  .nav-links {
    display: none;
    position: absolute; top: 56px; left: 0; right: 0;
    background: var(--paper); border-bottom: 1px solid var(--line);
    flex-direction: column; gap: 0; padding: 8px 24px 16px;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 10px 0; border-bottom: 1px solid var(--line-soft); }
  .nav-inner { position: relative; }
}

/* ---------- flashes ---------- */
.flashes { margin: 18px auto 0; }
.flash { border: 1px solid; border-radius: var(--radius); padding: 10px 14px; font-size: 14px; margin-bottom: 8px; }
.flash-ok { background: var(--ok-wash); border-color: rgba(63, 118, 94, 0.35); color: var(--ok); }
.flash-err { background: var(--err-wash); border-color: rgba(180, 71, 61, 0.35); color: var(--err); }

/* ---------- page scaffolding ---------- */
.page-head { padding: 72px 24px 40px; border-bottom: 1px solid var(--line); }
.page-head .kicker { margin-bottom: 14px; }
.page-head h1, .section-head h2, .cta h2 {
  font-size: clamp(30px, 4.4vw, 44px);
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.08;
}
.lead { color: var(--muted); font-size: 17px; max-width: 640px; margin-top: 14px; }
.section-s { padding: 56px 24px; }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; margin-bottom: 34px; flex-wrap: wrap; }
.section-head .kicker { margin-bottom: 12px; }

/* ---------- hero ---------- */
.hero { padding: 72px 0 64px; border-bottom: 1px solid var(--line); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 56px; align-items: center; }
.hero-kicker { margin-bottom: 18px; }
.hero h1 {
  font-size: clamp(34px, 4.6vw, 50px);
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1.05;
}
.hero h1 em { font-style: normal; color: var(--signal-deep); }
.hero .lead { margin-top: 18px; font-size: 16.5px; }
.hero-actions { display: flex; gap: 16px; align-items: center; margin-top: 30px; flex-wrap: wrap; }
.hero-stats { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 42px; border-top: 1px solid var(--line); }
.hero-stats > div { padding: 18px 16px 0 0; border-right: 1px solid var(--line); margin-right: 16px; }
.hero-stats > div:last-child { border-right: none; margin-right: 0; }
.hero-stats b { display: block; font-family: var(--mono); font-size: 22px; font-weight: 500; letter-spacing: -0.02em; }
.hero-stats span { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.08em; }

/* ---------- gateway demo panel ---------- */
.demo {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}
.demo-bar {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--line);
  font-family: var(--mono); font-size: 11px;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--muted);
}
.demo-bar .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--ok); }
.demo-bar .ok-chip { margin-left: auto; color: var(--ok); border: 1px solid rgba(63, 118, 94, 0.35); border-radius: 2px; padding: 2px 8px; }
.demo-body { padding: 8px 20px 20px; }
.demo-row {
  display: grid;
  grid-template-columns: 52px 130px 1fr;
  gap: 14px;
  align-items: center;
  padding: 16px 0;
  border-bottom: 1px dashed var(--line);
}
.demo-row:last-of-type { border-bottom: none; }
.demo-no { font-family: var(--mono); font-size: 11px; color: var(--muted); letter-spacing: 0.1em; }
.demo-no b { display: block; color: var(--ink); font-weight: 500; font-size: 15px; }
.demo-label { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.1em; font-family: var(--mono); }
.demo-value { font-size: 15px; font-weight: 500; }
.demo-value small { display: block; font-weight: 400; color: var(--muted); font-size: 12.5px; }
.demo-row .key-chip {
  font-family: var(--mono); font-size: 13px;
  background: var(--paper-2); border: 1px solid var(--line);
  border-radius: 2px; padding: 3px 8px; display: inline-block;
}
.demo-routes { padding: 14px 0 4px; }
.demo-routes .demo-label { display: block; margin-bottom: 10px; }
.route-opt {
  display: flex; align-items: center; gap: 10px;
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 10px 14px; margin-bottom: 8px;
  cursor: pointer; font-size: 14px;
  transition: border-color 0.15s, background 0.15s;
}
.route-opt:hover { border-color: var(--ink); }
.route-opt input { accent-color: var(--signal-deep); }
.route-opt.on { border-color: var(--signal-deep); background: var(--signal-wash); }
.route-opt .r-name { font-family: var(--mono); font-size: 13px; font-weight: 500; }
.route-opt .r-note { color: var(--muted); font-size: 12.5px; margin-left: auto; text-align: right; }

/* ---------- marquee ---------- */
.marquee {
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background: var(--paper-2);
  padding: 13px 0;
}
.marquee-track {
  display: flex; gap: 44px;
  width: max-content;
  animation: marquee 36s linear infinite;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}
.marquee-track span { white-space: nowrap; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ---------- numbered feature rail ---------- */
.rail { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 56px; }
.rail-item {
  position: relative;
  padding: 26px 0 30px 34px;
  border-top: 1px solid var(--line);
}
.rail-item::before {
  content: "";
  position: absolute; left: 0; top: -4px;
  width: 9px; height: 9px;
  background: var(--paper);
  border: 2px solid var(--ink);
}
.rail-no {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--signal-deep);
  text-transform: uppercase;
}
.rail-item h3 { font-size: 18.5px; font-weight: 600; letter-spacing: -0.01em; margin: 8px 0 8px; }
.rail-item p { color: var(--muted); font-size: 14.5px; }

/* ---------- dark catalog (master-detail) ---------- */
.catalog {
  background: var(--dark);
  color: var(--dark-ink);
  padding: 72px 0 80px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.catalog .kicker, .catalog .kick { color: var(--dark-muted); }
.catalog .kicker::before, .catalog .kick::before { background: var(--signal); }
.catalog .section-head h2 { color: var(--dark-ink); }
.catalog .lead { color: var(--dark-muted); }
.cat-grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: 1px;
  background: var(--dark-line);
  border: 1px solid var(--dark-line);
  border-radius: var(--radius);
  overflow: hidden;
  margin-top: 38px;
}
.cat-list { background: var(--dark); max-height: 560px; overflow-y: auto; }
.cat-head {
  padding: 14px 18px;
  font-family: var(--mono); font-size: 11px;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--dark-muted);
  border-bottom: 1px solid var(--dark-line);
  position: sticky; top: 0; background: var(--dark); z-index: 2;
}
.cat-item {
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 12px;
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  border-bottom: 1px solid var(--dark-line-soft);
  padding: 13px 18px;
  cursor: pointer;
  color: var(--dark-muted);
  font-family: var(--font);
  transition: background 0.12s, color 0.12s;
}
.cat-item:hover { background: var(--dark-2); color: var(--dark-ink); }
.cat-item.on { background: var(--dark-2); color: var(--dark-ink); box-shadow: inset 3px 0 0 var(--signal); }
.cat-item .ci-no { font-family: var(--mono); font-size: 11px; padding-top: 3px; }
.cat-item .ci-id { font-family: var(--mono); font-size: 13.5px; font-weight: 500; }
.cat-item .ci-fam { font-size: 12px; color: var(--dark-muted); }
.cat-detail { background: var(--dark-2); padding: 26px 28px 30px; }
.cat-detail .panel-only { display: none; }
.cat-detail .panel-only.on { display: block; }
.cat-kick {
  font-family: var(--mono); font-size: 11px;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--dark-muted);
  display: flex; gap: 10px; align-items: center;
  margin-bottom: 12px;
}
.cat-kick::after { content: ""; height: 1px; background: var(--dark-line); flex: 1; }
.cat-detail h3 {
  font-family: var(--mono);
  font-size: 24px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--dark-ink);
}
.cat-detail .cat-desc { color: var(--dark-muted); font-size: 14px; margin: 8px 0 22px; max-width: 480px; }
.cat-sec { border-top: 1px solid var(--dark-line); padding: 18px 0; }
.cat-sec .cat-kick { margin-bottom: 14px; }
.proto-row {
  display: flex; align-items: center; gap: 12px;
  padding: 9px 0;
  font-size: 14px;
  border-bottom: 1px solid var(--dark-line-soft);
}
.proto-row:last-child { border-bottom: none; }
.proto-row .method {
  font-family: var(--mono); font-size: 11px;
  background: var(--signal); color: var(--signal-ink);
  border-radius: 2px; padding: 2px 7px;
  font-weight: 500; letter-spacing: 0.06em;
}
.proto-row .path { font-family: var(--mono); font-size: 13px; color: var(--dark-ink); }
.proto-row .path-desc { color: var(--dark-muted); font-size: 12.5px; margin-left: auto; }
.price-row {
  display: flex; align-items: baseline; gap: 14px;
  padding: 11px 0;
  border-bottom: 1px solid var(--dark-line-soft);
}
.price-row:last-child { border-bottom: none; }
.price-row .pr-label { font-weight: 500; font-size: 14.5px; }
.price-row .pr-note { color: var(--dark-muted); font-size: 12.5px; }
.price-row .pr-value { margin-left: auto; font-family: var(--mono); font-size: 15px; color: var(--signal-strong); }
.price-row .pr-unit { font-family: var(--mono); font-size: 11px; color: var(--dark-muted); }
.cat-foot {
  border-top: 1px solid var(--dark-line);
  margin-top: 24px; padding-top: 18px;
  display: flex; gap: 14px; align-items: center; flex-wrap: wrap;
  color: var(--dark-muted); font-size: 13px;
}
.cat-foot .btn-primary { background: var(--signal); border-color: var(--signal); color: var(--signal-ink); }
.cat-foot .btn-primary:hover { background: var(--signal-strong); color: var(--signal-ink); }

/* ---------- quickstart / steps ---------- */
.steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px; }
.step { border-top: 1px solid var(--ink); padding-top: 18px; }
.step-no {
  font-family: var(--mono); font-size: 12px;
  color: var(--signal-deep); letter-spacing: 0.12em;
}
.step h3 { font-size: 17.5px; font-weight: 600; margin: 8px 0 8px; letter-spacing: -0.01em; }
.step p { color: var(--muted); font-size: 14.5px; }
.step .snip {
  margin-top: 14px;
  font-family: var(--mono); font-size: 12.5px;
  background: var(--paper-2); border: 1px solid var(--line);
  border-radius: 2px; padding: 8px 10px;
  display: inline-block; color: var(--ink-soft);
}

/* ---------- code blocks & tabs ---------- */
pre.code, pre.term {
  background: var(--code-bg);
  color: var(--code-fg);
  border-radius: var(--radius);
  border: 1px solid rgba(236, 245, 244, 0.1);
  padding: 18px 20px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 12.8px;
  line-height: 1.7;
}
pre.code code, pre.term code { background: none; border: none; padding: 0; font-size: inherit; color: inherit; }
pre.code .c, pre.term .c { color: #6b7a76; }
pre.code .s, pre.term .s { color: #67e8f9; }
.term-bar {
  display: flex; align-items: center; gap: 6px;
  padding: 9px 14px;
  background: var(--code-bg);
  border: 1px solid rgba(236, 245, 244, 0.1);
  border-bottom: none;
  border-radius: var(--radius) var(--radius) 0 0;
  color: #6b7a76;
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.1em;
}
.term-bar + pre.term { border-radius: 0 0 var(--radius) var(--radius); }
.term-bar i { width: 8px; height: 8px; border-radius: 50%; background: #2a3330; display: inline-block; }
.term-bar i:first-child { background: var(--signal); }
.term-bar span { margin-left: 6px; }
.tabs { display: flex; gap: 0; border-bottom: 1px solid var(--dark-line); }
.tab {
  background: none; border: none; cursor: pointer;
  font-family: var(--mono); font-size: 12.5px;
  color: var(--dark-muted);
  padding: 10px 16px;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}
.tab:hover { color: var(--dark-ink); }
.tab.on { color: var(--signal-strong); border-bottom-color: var(--signal); }
.tab-panel { display: none; }
.tab-panel.on { display: block; }

/* ---------- tables ---------- */
.table-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow-x: auto;
}
.tbl { width: 100%; border-collapse: collapse; font-size: 14px; }
.tbl th {
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
.tbl td { padding: 12px 16px; border-bottom: 1px solid var(--line-soft); vertical-align: middle; }
.tbl tbody tr:last-child td { border-bottom: none; }
.tbl tbody tr:hover td { background: rgba(22, 24, 26, 0.02); }
.tbl .mono { font-size: 13px; }
.tbl td code { white-space: nowrap; }
.copy { cursor: pointer; }
.copy:hover { border-color: var(--signal-deep); color: var(--signal-deep); }
.chip {
  display: inline-block;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 2px 8px;
  color: var(--ink-soft);
  background: var(--paper-2);
  white-space: nowrap;
}
.after-table { margin-top: 18px; color: var(--muted); font-size: 14px; }
.pager { display: flex; gap: 8px; margin-top: 16px; flex-wrap: wrap; }
.pager a, .pager span {
  font-family: var(--mono); font-size: 13px;
  border: 1px solid var(--line); border-radius: 2px;
  padding: 5px 12px; text-decoration: none; color: var(--ink-soft);
}
.pager .cur { background: var(--ink); color: var(--paper); border-color: var(--ink); }

/* ---------- tags & badges ---------- */
.tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  border-radius: 2px;
  padding: 2px 8px;
  border: 1px solid;
}
.tag-ok { color: var(--ok); border-color: rgba(63, 118, 94, 0.4); background: var(--ok-wash); }
.tag-err { color: var(--err); border-color: rgba(180, 71, 61, 0.4); background: var(--err-wash); }
.tag-wait { color: var(--wait); border-color: rgba(147, 103, 34, 0.4); background: var(--wait-wash); }
.badge {
  display: inline-block; font-family: var(--mono); font-size: 11px;
  border: 1px solid var(--line); border-radius: 2px; padding: 2px 8px;
  color: var(--muted); text-transform: uppercase; letter-spacing: 0.1em;
}

/* ---------- panels & cards ---------- */
.panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 24px;
  margin-bottom: 20px;
}
.panel h3 { font-size: 16px; font-weight: 600; letter-spacing: -0.01em; margin-bottom: 14px; }
.panel > p { margin-bottom: 14px; }
.price-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.price-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
}
.price-card h3 { font-family: var(--mono); font-size: 13px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); font-weight: 500; }
.price-big { font-size: 46px; font-weight: 500; letter-spacing: -0.03em; margin: 14px 0 6px; }
.price-big span { font-size: 16px; color: var(--muted); font-weight: 400; letter-spacing: 0; }
.price-card p { color: var(--muted); font-size: 14.5px; }
.price-card ul { list-style: none; margin: 18px 0 24px; }
.price-card li { padding: 9px 0; border-top: 1px solid var(--line-soft); font-size: 14.5px; display: flex; gap: 10px; align-items: center; }
.price-card li::before { content: ""; width: 7px; height: 7px; background: var(--signal); flex: none; }

/* ---------- console preview cards (dark) ---------- */
.dark-band {
  background: var(--dark);
  color: var(--dark-ink);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 64px 0 72px;
}
.dark-band .kicker { color: var(--dark-muted); }
.dark-band .section-head h2 { color: var(--dark-ink); }
.dark-band .lead { color: var(--dark-muted); }
.ops-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; background: var(--dark-line); border: 1px solid var(--dark-line); border-radius: var(--radius); overflow: hidden; }
.ops-card { background: var(--dark); padding: 26px 26px 30px; }
.ops-card .no { color: var(--dark-muted); display: block; margin-bottom: 12px; }
.ops-card .no b { color: var(--signal-strong); }
.ops-card h3 { color: var(--dark-ink); font-size: 17.5px; font-weight: 600; margin-bottom: 8px; letter-spacing: -0.01em; }
.ops-card p { color: var(--dark-muted); font-size: 14px; }

/* ---------- coverage stats ---------- */
.cov-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; margin-top: 36px; }
.cov-card { border-top: 1px solid var(--ink); padding-top: 16px; }
.cov-card b { font-family: var(--mono); font-size: 26px; font-weight: 500; letter-spacing: -0.02em; display: block; }
.cov-card span { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.1em; }

/* ---------- CTA & FAQ ---------- */
.cta { padding: 72px 0; border-top: 1px solid var(--line); }
.cta h2 { font-size: clamp(28px, 3.8vw, 40px); }
.cta h2 em { font-style: normal; color: var(--signal-deep); }
.cta .lead { margin-bottom: 28px; }
.faq { border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 4px;
  font-size: 16px;
  font-weight: 500;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; margin-left: auto; font-family: var(--mono); color: var(--muted); font-size: 18px; }
.faq details[open] summary::after { content: "–"; }
.faq details p { padding: 0 4px 20px; color: var(--muted); font-size: 14.5px; max-width: 760px; }

/* ---------- forms ---------- */
input[type="text"], input[type="email"], input[type="password"], input[type="number"], select, textarea {
  font-family: var(--font);
  font-size: 14.5px;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 9px 12px;
  width: 100%;
}
input:focus, select:focus, textarea:focus { outline: 2px solid rgba(34, 211, 238, 0.5); outline-offset: -1px; border-color: var(--signal-deep); }
input::placeholder, textarea::placeholder { color: #9aa39d; }
label { font-size: 13.5px; font-weight: 500; display: block; margin-bottom: 6px; }
.form-row { margin-bottom: 16px; }
.inline-form { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.inline-form input[type="text"], .inline-form input[type="number"] { width: auto; flex: 1 1 200px; }
.amount-wrap { display: flex; align-items: center; gap: 0; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; padding: 0 0 0 12px; }
.amount-wrap:focus-within { border-color: var(--signal-deep); }
.amount-cur { font-family: var(--mono); color: var(--muted); }
.amount-wrap input { border: none; border-radius: 0; width: 110px; padding: 9px 10px; }
.amount-wrap input:focus { outline: none; }
.amount-quick { display: flex; }
.amount-quick button {
  background: none; border: none; border-left: 1px solid var(--line-soft);
  font-family: var(--mono); font-size: 12.5px; color: var(--muted);
  padding: 0 12px; height: 40px; cursor: pointer;
}
.amount-quick button:hover { color: var(--signal-deep); background: var(--paper-2); }

/* ---------- auth pages ---------- */
.auth { max-width: 420px; margin: 0 auto; padding: 76px 24px 90px; }
.auth-card, .form-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 30px 34px;
}
.auth-card h1, .form-card h1 { font-size: 22px; font-weight: 600; letter-spacing: -0.01em; margin-bottom: 20px; }
.auth-alt { margin-top: 18px; font-size: 14px; color: var(--muted); text-align: center; }
.opt { font-size: 13.5px; color: var(--muted); margin: -6px 0 14px; }
.opt label { display: flex; gap: 8px; align-items: center; font-weight: 400; cursor: pointer; }

/* ---------- contact ---------- */
.contact-wrap { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 32px; align-items: start; }
.contact-side { border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); padding: 24px; }
.contact-side h3 { font-size: 15px; font-weight: 600; margin-bottom: 10px; }
.contact-side p { font-size: 14px; color: var(--muted); }

/* ---------- legal pages ---------- */
.legal { padding: 48px 24px 80px; max-width: 800px; }
.legal h2 { font-size: 19px; font-weight: 600; letter-spacing: -0.01em; margin: 34px 0 12px; padding-top: 18px; border-top: 1px solid var(--line); }
.legal h2:first-child { border-top: none; padding-top: 0; }
.legal p { color: var(--ink-soft); margin: 10px 0; }
.legal ul { padding-left: 22px; color: var(--ink-soft); }
.legal li { margin: 6px 0; }

/* ---------- docs ---------- */
.docs { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 44px; padding: 48px 24px 80px; }
.docs-nav { position: sticky; top: 80px; align-self: start; display: flex; flex-direction: column; gap: 2px; border-left: 1px solid var(--line); }
.docs-nav a {
  text-decoration: none; font-size: 13.5px; color: var(--muted);
  padding: 7px 0 7px 16px;
  border-left: 2px solid transparent; margin-left: -1.5px;
}
.docs-nav a:hover { color: var(--ink); }
.doc-block { border-top: 1px solid var(--line); padding: 30px 0 40px; }
.doc-block:first-child { border-top: none; padding-top: 0; }
.doc-block h2 { font-size: 21px; font-weight: 600; letter-spacing: -0.015em; margin-bottom: 14px; }
.doc-block h3 { font-size: 16px; font-weight: 600; margin: 22px 0 10px; }
.doc-block p { margin: 10px 0; color: var(--ink-soft); }
.doc-block ol, .doc-block ul { padding-left: 22px; color: var(--ink-soft); }
.doc-block li { margin: 6px 0; }
.doc-block pre.code { margin: 14px 0; }

/* ---------- console ---------- */
body.console { background: var(--paper); }
.console-wrap { display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: 36px; padding-top: 40px; padding-bottom: 80px; }
.console-title { font-size: 24px; font-weight: 600; letter-spacing: -0.02em; margin-bottom: 22px; }
.side { display: flex; flex-direction: column; gap: 2px; position: sticky; top: 80px; align-self: start; border-left: 1px solid var(--line); padding-left: 0; }
.side a {
  text-decoration: none; color: var(--muted); font-size: 14px; font-weight: 500;
  padding: 9px 0 9px 16px; border-left: 2px solid transparent; margin-left: -1.5px;
}
.side a:hover { color: var(--ink); }
.side a.on { color: var(--signal-deep); border-left-color: var(--signal-deep); }
.console-main { min-width: 0; }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-bottom: 22px; }
.stat-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 16px 18px;
}
.stat-card span { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.08em; display: block; margin-bottom: 6px; font-family: var(--mono); }
.stat-card b { font-family: var(--mono); font-size: 20px; font-weight: 500; display: block; }
.stat-card b em { font-style: normal; font-size: 14px; color: var(--muted); }
.stat-card a { display: inline-block; margin-top: 10px; font-size: 13px; }
.bars { display: flex; align-items: flex-end; gap: 4px; height: 140px; }
.bar { flex: 1; background: var(--signal-deep); border-radius: 1px 1px 0 0; min-height: 2px; opacity: 0.85; }
.bar:hover { opacity: 1; background: var(--ink); }
.bars-x { display: flex; justify-content: space-between; font-family: var(--mono); font-size: 11px; color: var(--muted); margin-top: 8px; }
.newkey-panel { border-color: var(--signal-deep); box-shadow: 0 0 0 1px var(--signal-deep); }
.newkey-row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.newkey-row code {
  font-size: 14px; background: var(--paper-2);
  border: 1px dashed var(--signal-deep); border-radius: 2px;
  padding: 8px 12px; word-break: break-all;
}

/* ---------- footer ---------- */
.footer { border-top: 1px solid var(--line); background: var(--paper); }
.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 2fr) repeat(3, minmax(0, 1fr));
  gap: 36px;
  padding: 56px 24px 40px;
}
.footer-brand p { color: var(--muted); font-size: 13.5px; margin-top: 14px; max-width: 300px; }
.footer-col h4 {
  font-family: var(--mono); font-size: 11px; font-weight: 500;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 14px;
}
.footer-col a { display: block; text-decoration: none; color: var(--ink-soft); font-size: 14px; padding: 5px 0; }
.footer-col a:hover { color: var(--signal-deep); }
.footer-legal { border-top: 1px solid var(--line); padding: 18px 24px; font-size: 12.5px; color: var(--muted); font-family: var(--mono); }

/* ---------- reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .marquee-track { animation: none; }
}

/* ---------- responsive ---------- */
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .rail { grid-template-columns: 1fr; }
  .cat-grid { grid-template-columns: 1fr; }
  .cat-list { max-height: 320px; }
  .steps { grid-template-columns: 1fr; }
  .ops-grid { grid-template-columns: 1fr; }
  .cov-grid { grid-template-columns: 1fr; }
  .docs { grid-template-columns: 1fr; }
  .docs-nav { position: static; flex-direction: row; overflow-x: auto; border-left: none; padding-bottom: 6px; }
  .docs-nav a { white-space: nowrap; border-left: none; border-bottom: 2px solid transparent; padding: 6px 14px 6px 0; }
  .contact-wrap { grid-template-columns: 1fr; }
  .console-wrap { grid-template-columns: 1fr; }
  .side { position: static; flex-direction: row; overflow-x: auto; border-left: none; }
  .side a { border-left: none; border-bottom: 2px solid transparent; padding: 8px 12px 8px 0; white-space: nowrap; }
  .side a.on { border-left: none; border-bottom-color: var(--signal-deep); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .hero-stats { gap: 0; }
  .demo-row { grid-template-columns: 44px 1fr; }
  .demo-row .demo-value { grid-column: 2; }
}
/* guards: keep grids from overflowing on narrow screens */
.hero-grid > *, .rail > *, .cat-grid > *, .steps > *, .ops-grid > *, .cov-grid > *,
.contact-wrap > *, .console-wrap > *, .docs > *, .footer-grid > *, .price-grid > * { min-width: 0; }