/* ═════════════════════════════════════════════════════════════════
   AIS — Apple-leaning minimal
   One sans family. Generous whitespace. Gold as a single product accent.
   ═════════════════════════════════════════════════════════════════ */

:root {
  --bg:         #0a0907;
  --bg-2:       #100d09;
  --bg-elev:    #16130e;

  --gold:       #c9a96e;
  --gold-soft:  #b89a5f;
  --gold-deep:  #8b6f3c;
  --gold-bright:#e8c97a;

  --ink:        #f4ede0;
  --ink-2:      #c8c0ad;
  --ink-dim:    #837b6c;
  --ink-dimmer: #4a4438;

  --hairline:   rgba(244, 237, 224, 0.08);
  --hairline-2: rgba(244, 237, 224, 0.18);

  --font-sans:  'Space Grotesk', system-ui, -apple-system, sans-serif;
  --font-mono:  'JetBrains Mono', ui-monospace, monospace;

  --container: 1200px;
  --gutter: 32px;
}

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

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
::selection { background: var(--gold); color: var(--bg); }

/* ── Typography ───────────────────────────────────────────────── */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--ink-dim);
  font-weight: 400;
}

.display {
  font-family: var(--font-sans);
  font-weight: 500;
  line-height: 1.02;
  letter-spacing: -0.035em;
  color: var(--ink);
}
.display.h1 { font-size: clamp(56px, 8.5vw, 128px); font-weight: 500; }
.display.h2 { font-size: clamp(40px, 6vw, 88px); font-weight: 500; }
.display.h3 { font-size: clamp(28px, 3.6vw, 48px); font-weight: 500; }

/* Gold accent — used ONCE per page, no italic */
.display .accent {
  color: var(--gold);
  font-weight: 500;
}

.lede {
  font-size: 19px;
  line-height: 1.55;
  color: var(--ink-2);
  font-weight: 400;
  max-width: 56ch;
  letter-spacing: -0.005em;
}

.body { color: var(--ink-2); line-height: 1.65; }

/* ── Layout ───────────────────────────────────────────────────── */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.divider {
  height: 1px;
  background: var(--hairline);
  margin: 0;
  border: 0;
}

section { position: relative; }

/* ── Nav ──────────────────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  padding: 20px var(--gutter);
  transition: padding 0.3s ease, background 0.3s ease;
  background: transparent;
}
.nav.scrolled {
  padding: 12px var(--gutter);
  background: rgba(10, 9, 7, 0.72);
  backdrop-filter: saturate(180%) blur(24px);
  -webkit-backdrop-filter: saturate(180%) blur(24px);
}
.nav-inner {
  max-width: var(--container);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}
.nav-brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 17px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.nav-logo-mark {
  flex-shrink: 0;
  display: block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-links a {
  font-size: 13.5px;
  color: var(--ink-2);
  padding: 8px 14px;
  border-radius: 6px;
  transition: color 0.2s ease;
}
.nav-links a:hover { color: var(--ink); }
.nav-links a.active { color: var(--ink); }

.nav-cta {
  font-size: 13px;
  padding: 9px 18px;
  background: var(--ink);
  color: var(--bg);
  border-radius: 999px;
  font-weight: 500;
  transition: all 0.25s ease;
}
.nav-cta:hover {
  background: var(--gold);
}

/* ── Hamburger button ────────────────────────────────────────── */
.nav-menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px 4px;
  z-index: 60;
  flex-shrink: 0;
}
.nav-menu-btn span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.3s cubic-bezier(.2,.8,.2,1), opacity 0.2s ease;
  transform-origin: center;
}
.nav-menu-btn.open span:nth-child(1) { transform: rotate(45deg) translate(4.7px, 4.7px); }
.nav-menu-btn.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-menu-btn.open span:nth-child(3) { transform: rotate(-45deg) translate(4.7px, -4.7px); }

/* ── Mobile nav overlay ──────────────────────────────────────── */
.nav-mobile {
  position: fixed;
  inset: 0;
  z-index: 45;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 96px var(--gutter) 56px;
  transform: translateX(100%);
  transition: transform 0.42s cubic-bezier(.2,.8,.2,1);
  overflow-y: auto;
}
.nav-mobile.open { transform: translateX(0); }

.nav-mobile-links {
  display: flex;
  flex-direction: column;
}
.nav-mobile-links a {
  font-size: clamp(32px, 9vw, 52px);
  font-weight: 500;
  color: var(--ink-2);
  letter-spacing: -0.03em;
  line-height: 1.1;
  padding: 14px 0;
  border-bottom: 1px solid var(--hairline);
  transition: color 0.2s ease, padding-left 0.2s ease;
}
.nav-mobile-links a:first-child { border-top: 1px solid var(--hairline); }
.nav-mobile-links a:hover { color: var(--ink); padding-left: 8px; }
.nav-mobile-links a.active { color: var(--gold); }

.nav-mobile-cta {
  margin-top: 40px;
  width: fit-content;
}

@media (max-width: 820px) {
  .nav-links { display: none; }
  .nav-cta   { display: none; }
  .nav-menu-btn { display: flex; }
}

/* ── Buttons ──────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 500;
  padding: 14px 26px;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.25s ease;
  text-decoration: none;
}
.btn-gold {
  background: var(--gold);
  color: var(--bg);
  border-color: var(--gold);
}
.btn-gold:hover {
  background: var(--gold-bright);
  border-color: var(--gold-bright);
}
.btn-light {
  background: var(--ink);
  color: var(--bg);
  border-color: var(--ink);
}
.btn-light:hover {
  background: #ffffff;
  border-color: #ffffff;
}
.btn-outline {
  background: transparent;
  color: var(--ink);
  border-color: var(--hairline-2);
}
.btn-outline:hover {
  border-color: var(--ink);
}
.btn-text {
  font-size: 15px;
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: color 0.25s ease;
}
.btn-text .arrow { color: var(--gold); transition: transform 0.25s ease; }
.btn-text:hover .arrow { transform: translateX(3px); }

/* ── Footer ───────────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--hairline);
  padding: 80px var(--gutter) 40px;
  margin-top: 120px;
}
.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 64px;
  padding-bottom: 56px;
  border-bottom: 1px solid var(--hairline);
}
.footer-brand {
  font-size: 22px;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 0 0 16px;
}
.footer-tag {
  font-size: 14px;
  color: var(--ink-dim);
  max-width: 30ch;
  line-height: 1.55;
}
.footer-col h4 {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-dim);
  font-weight: 400;
  margin: 0 0 18px;
}
.footer-col ul {
  list-style: none;
  padding: 0; margin: 0;
  display: flex;
  flex-direction: column;
  gap: 11px;
}
.footer-col a {
  color: var(--ink-2);
  font-size: 14px;
  transition: color 0.2s ease;
}
.footer-col a:hover { color: var(--gold); }

.footer-bottom {
  padding-top: 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 12px;
  color: var(--ink-dimmer);
}
.footer-bottom a { color: var(--ink-dimmer); }
.footer-bottom a:hover { color: var(--ink-2); }

@media (max-width: 900px) {
  .footer-top { grid-template-columns: 1fr 1fr; gap: 48px; }
}
@media (max-width: 540px) {
  .footer-top { grid-template-columns: 1fr; gap: 36px; }
}

/* ── Section header (cleaner) ─────────────────────────────────── */
.section-eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 28px;
}

/* ── Stat strip — quieter ─────────────────────────────────────── */
.stat-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}
.stat-strip .stat {
  padding: 40px 28px;
  border-right: 1px solid var(--hairline);
}
.stat-strip .stat:last-child { border-right: none; }
.stat-num {
  font-size: 52px;
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--ink);
}
.stat-num .unit {
  font-size: 22px;
  color: var(--ink-dim);
  margin-left: 4px;
  font-weight: 400;
  letter-spacing: 0;
}
.stat-label {
  font-size: 13px;
  color: var(--ink-dim);
  margin-top: 16px;
  letter-spacing: -0.005em;
}

@media (max-width: 800px) {
  .stat-strip { grid-template-columns: 1fr 1fr; }
  .stat-strip .stat:nth-child(2n) { border-right: none; }
  .stat-strip .stat:nth-child(-n+2) { border-bottom: 1px solid var(--hairline); }
  .stat-num { font-size: 42px; }
}

/* ── Module / service card ───────────────────────────────────── */
.card {
  border-top: 1px solid var(--hairline);
  padding: 56px 0;
  display: grid;
  grid-template-columns: 80px 1fr 1.4fr;
  gap: 48px;
  align-items: start;
  transition: opacity 0.4s ease;
}
.card-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.25em;
  color: var(--ink-dim);
  padding-top: 8px;
}
.card-title {
  font-size: clamp(28px, 3.4vw, 44px);
  line-height: 1.05;
  color: var(--ink);
  font-weight: 500;
  letter-spacing: -0.025em;
  margin: 0;
}
.card-desc {
  color: var(--ink-2);
  font-size: 16px;
  line-height: 1.65;
  margin: 0;
}
.card-meta {
  margin-top: 28px;
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  align-items: baseline;
}
.card-meta .num {
  font-size: 24px;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.card-meta .num.gold { color: var(--gold); }
.card-meta .label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--ink-dim);
  text-transform: uppercase;
  margin-left: 8px;
}

@media (max-width: 820px) {
  .card { grid-template-columns: 1fr; gap: 20px; }
  .card-num { padding-top: 0; }
}

/* ── Reveal ──────────────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.8s ease, transform 0.8s cubic-bezier(.2,.8,.2,1);
}
.reveal.in {
  opacity: 1;
  transform: translateY(0);
}

/* ── Utilities ───────────────────────────────────────────────── */
.mono { font-family: var(--font-mono); }
.gold { color: var(--gold); }
.dim  { color: var(--ink-dim); }
.center { text-align: center; }
.no-bottom { padding-bottom: 0 !important; }

/* Pill chip */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border: 1px solid var(--hairline-2);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-dim);
}
.chip .ddot {
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--gold);
}

/* Scrollbar */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: #1a1611; border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: #2a221a; }

/* ═══════════════════════════════════════════════════════════════
   RESPONSIVE UTILITIES
   ═══════════════════════════════════════════════════════════════ */

/* ── Section padding ─────────────────────────────────────────── */
.py-hero { padding: 220px var(--gutter) 160px; }
.py-xl   { padding: 200px var(--gutter); }
.py-lg   { padding: 160px var(--gutter); }
.py-md   { padding: 120px var(--gutter); }
.py-sm   { padding: 80px var(--gutter); }

/* ── 2-col section header ────────────────────────────────────── */
.sec-head {
  margin-bottom: 96px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: end;
}

/* ── 3-col stat mini-grid (inside cards) ─────────────────────── */
.stat-3 {
  margin-top: 36px;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 24px;
}

/* ── 3-col legend row ────────────────────────────────────────── */
.legend-3 {
  margin-top: 48px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
}

/* ── 4-col bordered grid ─────────────────────────────────────── */
.quad-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}
.quad-grid > div {
  padding: 40px 24px;
  border-right: 1px solid var(--hairline);
}
.quad-grid > div:last-child { border-right: none; }

/* ── Trust / logo wall ───────────────────────────────────────── */
.trust-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0;
  border-top: 1px solid var(--hairline);
  border-left: 1px solid var(--hairline);
}

/* ── Platform principles 2×2 ─────────────────────────────────── */
.principles-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}
.principles-grid > div {
  padding: 56px 48px 56px 0;
  border-bottom: 1px solid var(--hairline);
}
.principles-grid > div:nth-child(even) {
  padding: 56px 0 56px 48px;
  border-left: 1px solid var(--hairline);
}
.principles-grid > div:nth-child(3),
.principles-grid > div:nth-child(4) { border-bottom: none; }

/* ── Platform spec table ─────────────────────────────────────── */
.spec-table { margin-top: 80px; border-top: 1px solid var(--hairline); }
.spec-row {
  display: grid;
  grid-template-columns: 200px 1fr 1fr;
  padding: 28px 0;
  border-bottom: 1px solid var(--hairline);
  align-items: baseline;
  gap: 32px;
}

/* ── Contact 2-col layout ────────────────────────────────────── */
.contact-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 96px;
  align-items: start;
}

/* ════════════════════════════════════════════════════════════════
   TABLET — ≤ 768px
   ════════════════════════════════════════════════════════════════ */
@media (max-width: 768px) {
  :root { --gutter: 20px; }

  .py-hero { padding: 130px var(--gutter) 72px; }
  .py-xl   { padding: 80px var(--gutter); }
  .py-lg   { padding: 72px var(--gutter); }
  .py-md   { padding: 60px var(--gutter); }
  .py-sm   { padding: 48px var(--gutter); }

  .sec-head { grid-template-columns: 1fr; gap: 20px; margin-bottom: 48px; }

  .stat-3 { grid-template-columns: 1fr 1fr; }

  .legend-3 { grid-template-columns: 1fr; gap: 32px; margin-top: 32px; }

  .quad-grid { grid-template-columns: 1fr 1fr; }
  .quad-grid > div:nth-child(2n) { border-right: none; }
  .quad-grid > div:nth-child(-n+2) { border-bottom: 1px solid var(--hairline); }

  .trust-grid { grid-template-columns: repeat(3, 1fr); }

  .principles-grid { grid-template-columns: 1fr; }
  .principles-grid > div,
  .principles-grid > div:nth-child(even) {
    padding: 40px 0;
    border-left: none;
    border-bottom: 1px solid var(--hairline);
  }
  .principles-grid > div:last-child { border-bottom: none; }

  .spec-row { grid-template-columns: 1fr; gap: 4px; padding: 20px 0; }
  .spec-row > div:first-child {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--gold);
  }

  .contact-grid { grid-template-columns: 1fr; gap: 56px; }

  .lede { font-size: 17px; }
  .card { padding: 48px 0; }
  .footer { margin-top: 60px; padding: 56px var(--gutter) 32px; }
}

/* ════════════════════════════════════════════════════════════════
   SMALL MOBILE — ≤ 480px
   ════════════════════════════════════════════════════════════════ */
@media (max-width: 480px) {
  .py-hero { padding: 110px var(--gutter) 56px; }
  .py-xl   { padding: 64px var(--gutter); }
  .py-lg   { padding: 56px var(--gutter); }

  .quad-grid { grid-template-columns: 1fr; }
  .quad-grid > div { border-right: none !important; border-bottom: 1px solid var(--hairline) !important; }
  .quad-grid > div:last-child { border-bottom: none !important; }

  .trust-grid { grid-template-columns: repeat(2, 1fr); }

  .card { padding: 36px 0; }
}