/* ==========================================================================
   OpenTrace — global styles
   Palette: BG #F4F4F6 · Accent #0D0D0F (monochrome ledger)
   ========================================================================== */

@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap");

/* ---------- Tokens ---------- */
:root {
  --bg: #F4F4F6;
  --surface: #FBFBFC;
  --raised: #FFFFFF;
  --border: #E2E2E7;
  --line: #D3D3DA;
  --text: #0D0D0F;
  --muted: #6A6A73;
  --accent: #0D0D0F;
  --on-accent: #F4F4F6;
  --on-accent-muted: #8D8D96;
  --on-accent-line: #2A2A2F;
  --radius: 4px;
  --head-h: 64px;
}

/* ---------- Reset / base ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

html,
body {
  margin: 0;
  background: #F4F4F6;
  color: var(--text);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; }

h1, h2, h3 { margin: 0; line-height: 1.12; letter-spacing: -0.02em; }

p { margin: 0; }

/* ---------- Wrapper ---------- */
.tape {
  width: 100%;
  max-width: 1040px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 15px 24px;
  background: var(--accent);
  color: var(--on-accent);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.005em;
  text-decoration: none;
  white-space: nowrap;
  transition: transform .15s ease, opacity .15s ease;
}
.btn:hover { opacity: .88; }
.btn:active { transform: translateY(1px); }
.btn svg { width: 17px; height: 17px; fill: currentColor; flex-shrink: 0; }
.btn-sm { padding: 9px 16px; font-size: 13px; gap: 7px; }
.btn-sm svg { width: 14px; height: 14px; }

/* Inverted button for dark bands */
.btn-inv { background: var(--on-accent); color: var(--accent); border-color: var(--on-accent); }

/* ---------- Brand lockup (icon + darkened wordmark) ---------- */
.logo { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; }
.logo-icon { width: 30px; height: 30px; border-radius: 8px; border: 1px solid var(--border); background: var(--raised); }
.logo-word { display: block; width: 107px; height: 22px; overflow: hidden; }
.logo-word img {
  width: 122px;
  max-width: none;
  height: auto;
  margin-top: -19px;
  margin-left: -8px;
  filter: brightness(0);           /* white wordmark → ink on light background */
}

/* ---------- Header ---------- */
.top {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(244, 244, 246, .92);
  -webkit-backdrop-filter: saturate(160%) blur(12px);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.top-in {
  position: relative;
  height: var(--head-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.top-right { display: flex; align-items: center; gap: 10px; }

.nav {
  display: none;
  position: absolute;
  top: var(--head-h);
  left: 0;
  right: 0;
  background: var(--bg);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 8px 0 16px;
}
.nav.open { display: block; }
.nav-in { display: flex; flex-direction: column; }
.nav a {
  padding: 12px 20px;
  color: var(--muted);
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
}
.nav a:hover,
.nav a.on { color: var(--text); }

.burger {
  width: 40px;
  height: 40px;
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  padding: 0;
}
.burger span { display: block; width: 17px; height: 1.5px; background: var(--text); transition: transform .2s ease, opacity .2s ease; }
.burger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.burger.open span:nth-child(2) { opacity: 0; }
.burger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ---------- Eyebrow / section heads ---------- */
.eyebrow {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 2.8px;
  text-transform: uppercase;
  color: var(--accent);
}
.sec-head { display: grid; gap: 14px; margin-bottom: 36px; }
.sec-head h2 { font-size: clamp(1.7rem, 3.6vw, 2.5rem); font-weight: 700; }
.sec-head p { color: var(--muted); max-width: 560px; }

/* ==========================================================================
   Homepage
   ========================================================================== */

/* ---------- Hero: tall typographic opener ---------- */
.opener { padding-top: 64px; padding-bottom: 56px; }
.opener h1 {
  margin-top: 22px;
  font-size: clamp(2.6rem, 8.2vw, 5.6rem);
  font-weight: 700;
  letter-spacing: -0.045em;
  line-height: 1;
  max-width: 900px;
}
.opener h1 .soft { color: var(--muted); font-weight: 500; }
.opener-foot {
  margin-top: 36px;
  display: grid;
  gap: 28px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}
.opener-lead { font-size: 18px; color: var(--muted); max-width: 520px; line-height: 1.55; }
.opener-lead strong { color: var(--text); font-weight: 600; }
.opener-cta { display: grid; gap: 12px; justify-items: start; }
.opener-note { font-size: 13px; color: var(--muted); }

/* Quote-currency ticker row */
.quotes {
  margin-top: 40px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}
.quotes-label { font-size: 12px; color: var(--muted); margin-right: 6px; }
.quotes span.q {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .04em;
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--raised);
}

/* ---------- Showcase band (dark) ---------- */
.band { background: var(--accent); color: var(--on-accent); padding-top: 64px; padding-bottom: 64px; }
.band-grid { display: grid; gap: 40px; align-items: center; }
.band-intro { display: grid; gap: 20px; justify-items: start; }
.band-icon { width: 96px; height: 96px; border-radius: 22px; background: var(--on-accent); }   /* icon is a dark mark on transparent → light tile */
.band-intro h2 { font-size: clamp(1.7rem, 3.6vw, 2.4rem); font-weight: 700; }
.band-intro p { color: var(--on-accent-muted); max-width: 420px; }
.band-intro .eyebrow { color: var(--on-accent-muted); }

/* CSS mock UI — trade entry + stats */
.mock { display: grid; gap: 14px; }
.mock-card {
  background: #16161A;
  border: 1px solid var(--on-accent-line);
  border-radius: 10px;
  padding: 18px;
}
.mock-row { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.mock-pair { font-weight: 700; font-size: 17px; letter-spacing: -0.01em; }
.mock-side {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 3px 8px;
  border: 1px solid var(--on-accent-muted);
  border-radius: 3px;
  color: var(--on-accent);
}
.mock-pnl { font-size: 26px; font-weight: 700; letter-spacing: -0.02em; margin-top: 14px; }
.mock-pnl small { font-size: 14px; font-weight: 500; color: var(--on-accent-muted); margin-left: 6px; }
.mock-meta {
  margin-top: 14px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  padding-top: 14px;
  border-top: 1px solid var(--on-accent-line);
}
.mock-meta div { font-size: 11px; color: var(--on-accent-muted); }
.mock-meta b { display: block; margin-top: 2px; font-size: 14px; font-weight: 600; color: var(--on-accent); }
.mock-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px; }
.mock-tags span {
  font-size: 11px;
  padding: 4px 9px;
  border-radius: 999px;
  background: var(--on-accent-line);
  color: var(--on-accent);
}
.mock-head { font-size: 11px; letter-spacing: 1.5px; text-transform: uppercase; color: var(--on-accent-muted); }
.mock-curve {
  margin-top: 14px;
  height: 64px;
  display: flex;
  align-items: flex-end;
  gap: 4px;
}
.mock-curve i { flex: 1; display: block; background: var(--on-accent); opacity: .85; border-radius: 2px 2px 0 0; }
.mock-curve i.dim { opacity: .3; }

/* ---------- Feature ledger (definition list) ---------- */
.ledger { padding-top: 72px; padding-bottom: 24px; }
.ledger + .ledger { padding-top: 48px; }
.ledger dl { margin: 0; border-top: 1px solid var(--accent); }
.ledger .row {
  display: grid;
  gap: 6px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}
.ledger dt {
  font-size: 13px;
  font-weight: 500;
  color: var(--muted);
  display: flex;
  gap: 12px;
}
.ledger dt .n { font-variant-numeric: tabular-nums; color: var(--text); font-weight: 600; }
.ledger dd { margin: 0; font-size: 17px; line-height: 1.5; }
.ledger dd .sub { display: block; margin-top: 4px; font-size: 14px; color: var(--muted); }

/* ---------- Devices strip ---------- */
.devices { padding-top: 56px; padding-bottom: 8px; }
.devices-in {
  display: grid;
  gap: 18px;
  padding: 28px;
  background: var(--raised);
  border: 1px solid var(--border);
  border-radius: 10px;
}
.devices-in h3 { font-size: 22px; font-weight: 700; }
.devices-in p { color: var(--muted); }

/* ---------- Privacy stats ---------- */
.zero { padding-top: 72px; padding-bottom: 72px; }
.zero-grid { display: grid; gap: 0; border-top: 1px solid var(--line); }
.zero-col { padding: 26px 0; border-bottom: 1px solid var(--line); }
.zero-num { font-size: 64px; font-weight: 800; letter-spacing: -0.05em; line-height: 1; }
.zero-label { margin-top: 10px; font-weight: 600; }
.zero-text { margin-top: 4px; font-size: 14px; color: var(--muted); }
.zero-foot { margin-top: 28px; color: var(--muted); }
.zero-foot strong { color: var(--text); }

/* ---------- Closing CTA ---------- */
.close { padding-bottom: 80px; }
.close-in {
  display: grid;
  gap: 22px;
  justify-items: start;
  padding: 40px 28px;
  border: 1px solid var(--accent);
  border-radius: 10px;
  background: var(--raised);
}
.close-in h2 { font-size: clamp(1.7rem, 3.6vw, 2.5rem); font-weight: 700; max-width: 620px; }
.close-in p { color: var(--muted); max-width: 520px; }

/* ==========================================================================
   Secondary pages
   ========================================================================== */
.doc-head { padding-top: 56px; padding-bottom: 32px; }
.doc-head h1 { margin-top: 16px; font-size: clamp(2.1rem, 5vw, 3.4rem); font-weight: 700; letter-spacing: -0.035em; }
.doc-head p { margin-top: 14px; color: var(--muted); max-width: 600px; }
.doc-head .stamp { margin-top: 10px; font-size: 13px; color: var(--muted); }

.doc { padding-bottom: 80px; }
.cards { display: grid; gap: 14px; }
.card {
  background: var(--raised);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
}
.card h2,
.card h3 { font-size: 18px; font-weight: 700; letter-spacing: -0.01em; }
.card .k {
  display: block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 10px;
}
.card p { margin-top: 10px; color: var(--muted); font-size: 15px; }
.card p + p { margin-top: 8px; }
.card ul { margin: 10px 0 0; padding-left: 18px; color: var(--muted); font-size: 15px; }
.card li + li { margin-top: 4px; }
.card a { font-weight: 600; }

.card-dark { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.card-dark .k,
.card-dark p { color: var(--on-accent-muted); }
.card-dark a { color: var(--on-accent); }

.pair { display: grid; gap: 14px; margin-top: 14px; }
.big-mail { display: inline-block; margin-top: 14px; font-size: 20px; font-weight: 700; letter-spacing: -0.01em; word-break: break-all; }

.doc-note { margin-top: 28px; font-size: 13px; color: var(--muted); }

/* ---------- 404 ---------- */
.lost { padding-top: 96px; padding-bottom: 120px; display: grid; gap: 18px; justify-items: start; }
.lost h1 { font-size: clamp(3rem, 10vw, 6rem); font-weight: 800; letter-spacing: -0.05em; }
.lost p { color: var(--muted); }

/* ==========================================================================
   Footer
   ========================================================================== */
.foot { border-top: 1px solid var(--line); padding-top: 40px; padding-bottom: 40px; }
.foot-grid { display: grid; gap: 24px; }
.foot-brand p { margin-top: 12px; font-size: 14px; color: var(--muted); max-width: 300px; }
.foot-links { display: flex; flex-wrap: wrap; gap: 10px 22px; }
.foot-links a { color: var(--muted); text-decoration: none; font-size: 14px; font-weight: 500; }
.foot-links a:hover { color: var(--text); }
.foot-legal { font-size: 13px; color: var(--muted); }
.foot-legal a { color: var(--muted); }

/* ==========================================================================
   Desktop
   ========================================================================== */
@media (min-width: 640px) {
  .opener-foot { grid-template-columns: 1.2fr 1fr; align-items: end; }
  .opener-cta { justify-items: end; text-align: right; }
  .ledger .row { grid-template-columns: 240px 1fr; gap: 24px; }
  .zero-grid { grid-template-columns: repeat(3, 1fr); border-bottom: 1px solid var(--line); }
  .zero-col { border-bottom: none; padding: 30px 24px 30px 0; }
  .zero-col + .zero-col { border-left: 1px solid var(--line); padding-left: 24px; }
  .devices-in { grid-template-columns: 1fr 1.4fr; align-items: center; padding: 32px 36px; }
  .pair { grid-template-columns: 1fr 1fr; }
  .cards.two { grid-template-columns: 1fr 1fr; }
  .close-in { padding: 56px 48px; }
}

@media (min-width: 760px) {
  .tape { padding-left: 32px; padding-right: 32px; }
  .nav {
    display: block;
    position: static;
    border: none;
    background: transparent;
    padding: 0;
  }
  .nav-in { flex-direction: row; gap: 4px; }
  .nav a { padding: 8px 12px; font-size: 14px; }
  .burger { display: none; }
}

@media (min-width: 900px) {
  .opener { padding-top: 96px; padding-bottom: 72px; }
  .band { padding-top: 88px; padding-bottom: 88px; }
  .band-grid { grid-template-columns: 1fr 1.1fr; gap: 64px; }
  .mock { grid-template-columns: 1fr 1fr; align-items: start; }
  .mock-card.wide { grid-column: 1 / -1; }
  .ledger { padding-top: 96px; }
  .ledger .row { grid-template-columns: 300px 1fr; padding: 24px 0; }
  .foot-grid { grid-template-columns: 1.2fr 1fr; align-items: start; }
  .foot-links { justify-content: flex-end; }
  .foot-legal { grid-column: 1 / -1; }
}