/* ============================================================================
   integral-ops — Shared Chrome v1
   The canonical Integral chrome layer. Pairs with tokens-v1.css.
   Source of truth: KIZUNA-SITE-vStudio-2.html (Studio, 2026-04).
   Location (source):  Iksha/integral-ops/brand/system/chrome-v1.css
   Location (served):  https://integral.sg/brand/chrome-v1.css
   Generated:          2026-04-20

   Import pattern (every *.integral.sg surface):

     <link rel="preconnect" href="https://fonts.googleapis.com">
     <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
     <link href="https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Fraunces:opsz,wght@9..144,500;9..144,600&display=swap" rel="stylesheet">
     <link rel="stylesheet" href="https://integral.sg/brand/tokens-v1.css">
     <link rel="stylesheet" href="https://integral.sg/brand/chrome-v1.css">

   Two-layer rule (see STYLE-GUIDE.md § 1.1):
   - Layer 1 (this file): shared chrome — nav, footer, labels, headings,
     cards, hero kicker, buttons, section rhythm, containers.
   - Layer 2 (inline on each surface): product-specific accents —
     giant kanji motifs, Noto Serif JP, phase markers, surface-unique vars.

   What's deliberately NOT in this file:
   - Kizuna giant 絆 kanji (.hero::before, .cta-section::before)
   - Noto Serif JP font import or rules
   - Phase journey markers (.phase-*)
   - --kizuna-ink or any single-product variable
   These stay inline on the surface that owns them.

   Version bump policy: breaking visual changes → new filename
   (chrome-v2.css). Additive changes → patch this file.
   ============================================================================ */

/* ---- Reset / base ------------------------------------------------------ */

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-body);
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }

p { margin: 0 0 var(--sp-4); }
p:last-child { margin-bottom: 0; }

/* ---- Headings — Fraunces display, navy, snug tracking ------------------ */

h1, h2, h3 {
  font-family: var(--font-display);
  color: var(--navy);
  margin: 0 0 var(--sp-6);
}

h1 {
  font-size: var(--fs-4xl);
  font-weight: 500;
  line-height: var(--lh-tight);
  letter-spacing: var(--track-tight);
  font-feature-settings: "ss01" on;
  max-width: 900px;
}

h2 {
  font-size: var(--fs-2xl);
  font-weight: 500;
  line-height: var(--lh-snug);
  letter-spacing: var(--track-snug);
  margin-bottom: var(--sp-8);
}

h3 {
  font-size: var(--fs-lg);
  font-weight: 500;
  line-height: 1.25;
  letter-spacing: -0.005em;
  margin-bottom: var(--sp-3);
}

/* ---- Navigation (shared Integral chrome) ------------------------------- */

.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: saturate(140%) blur(8px);
  -webkit-backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--rule);
}

.nav-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.wordmark {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 20px;
  color: var(--navy);
  letter-spacing: -0.01em;
  line-height: 1;
  font-feature-settings: "ss01" on;
}
.wordmark em { font-style: normal; color: var(--gold); }

.wordmark-sub {
  display: block;
  font-family: var(--font-sans);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--slate);
  margin-top: 3px;
}

.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a {
  color: var(--ink);
  font-size: var(--fs-sm);
  font-weight: 500;
}
.nav-links a:hover { color: var(--navy); }
.nav-links a.active {
  color: var(--navy);
  border-bottom: 1px solid var(--gold);
  padding-bottom: 2px;
}

/* ---- Layout primitives ------------------------------------------------- */

main { padding-top: var(--nav-h); }

section {
  padding: var(--sp-20) var(--sp-6);
  border-bottom: 1px solid var(--rule);
}
section:last-of-type { border-bottom: none; }

.container        { max-width: var(--max);        margin: 0 auto; }
.container-narrow { max-width: var(--max-narrow); margin: 0 auto; }

/* ---- Eyebrow label with 24px gold prefix hairline ---------------------- */

.label {
  display: inline-block;
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: var(--track-label);
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: var(--sp-4);
}
.label::before {
  content: "";
  display: inline-block;
  width: 24px;
  height: 1px;
  background: var(--gold);
  vertical-align: middle;
  margin-right: 12px;
  margin-bottom: 3px;
}

/* ---- Hero (chrome only — surfaces add product-accent overlays inline) -- */

.hero {
  padding: 160px var(--sp-6) 100px;
  background:
    radial-gradient(1400px 500px at 75% 0%, rgba(30, 58, 95, 0.05), transparent 60%),
    radial-gradient(800px 400px at 10% 100%, rgba(176, 141, 78, 0.08), transparent 65%),
    var(--paper);
  border-bottom: 1px solid var(--rule);
  position: relative;
  overflow: hidden;
}

.hero-inner {
  max-width: var(--max);
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero-kicker {
  display: inline-flex;
  align-items: baseline;
  gap: 14px;
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: var(--track-display);
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 28px;
  padding: 8px 0 10px;
  border-top: 1px solid var(--gold);
  border-bottom: 1px solid var(--gold);
}

.hero h1 {
  margin: 0 0 28px;
}

.hero .lede {
  font-size: var(--fs-md);
  line-height: 1.55;
  color: var(--ink);
  max-width: 720px;
  margin: 0 0 var(--sp-8);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 28px 48px;
  padding-top: 28px;
  border-top: 1px solid var(--rule);
  margin-top: var(--sp-6);
}
.hero-meta-item { min-width: 180px; }
.hero-meta-item .k {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: var(--track-label);
  text-transform: uppercase;
  color: var(--slate-lighter);
  margin-bottom: 6px;
}
.hero-meta-item .v {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 500;
  color: var(--navy);
  letter-spacing: -0.005em;
}

/* ---- Launch / notice block (cream section with gold top-rule date) ----- */

.launch {
  background: var(--cream);
  padding: 72px var(--sp-6);
}
.launch-inner {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 56px;
  align-items: start;
}
.launch-date {
  position: relative;
  padding-top: var(--sp-6);
}
.launch-date::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 40px;
  height: 2px;
  background: var(--gold);
}
.launch-date .k {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--slate);
  margin-bottom: 10px;
}
.launch-date .v {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 500;
  color: var(--navy);
  line-height: 1.1;
  letter-spacing: -0.01em;
}
.launch-body p {
  font-size: var(--fs-base);
  color: var(--ink);
  line-height: var(--lh-body);
  margin: 0;
}
.launch-body p + p { margin-top: 14px; }

/* ---- Card signature — gold 2px top-rule ("value-card" pattern) --------- */

.card {
  background: var(--paper);
  border: 1px solid var(--rule);
  padding: 32px 28px 28px;
  position: relative;
  border-radius: var(--radius-card);
}
.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 48px;
  height: 2px;
  background: var(--gold);
}
.card .audience,
.card-audience {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 12px;
}
.card h3 {
  font-size: var(--fs-lg);
  margin: 0 0 14px;
}
.card p {
  font-size: 15px;
  color: var(--ink);
  line-height: var(--lh-body);
  margin: 0;
}

/* Grid helper for card rows (opt-in) */
.card-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-6);
}

/* ---- Buttons ----------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 16px 28px;
  background: var(--paper);
  color: var(--navy);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.01em;
  border: 1px solid var(--paper);
  transition: background 120ms ease, color 120ms ease, border-color 120ms ease;
  min-height: 52px;
}
.btn:hover {
  background: var(--gold-light);
  border-color: var(--gold-light);
  color: var(--navy-dark);
}
.btn .arrow {
  font-family: var(--font-display);
  font-size: 18px;
  line-height: 1;
}

/* Inverse — for use on navy / dark sections (card-on-dark variant).
   Paper fill + navy ink so the button pops against a dark background;
   prior navy-on-navy spec rendered invisible at rest. */
.btn-inverse {
  background: var(--paper);
  color: var(--navy);
  border-color: var(--paper);
}
.btn-inverse:hover {
  background: var(--gold-light);
  border-color: var(--gold-light);
  color: var(--navy-dark);
}

/* ---- Dark CTA section (navy background with gold radial wash) --------- */

.cta-section {
  background: var(--navy);
  background-image:
    radial-gradient(800px 300px at 85% 100%, rgba(176, 141, 78, 0.22), transparent 70%),
    radial-gradient(600px 280px at 10% 0%, rgba(176, 141, 78, 0.08), transparent 60%);
  color: var(--paper);
  padding: 96px var(--sp-6);
  position: relative;
  overflow: hidden;
}
.cta-inner {
  max-width: var(--max);
  margin: 0 auto;
  position: relative;
  z-index: 1;
}
.cta-section .label { color: var(--gold-bright); }
.cta-section h2 {
  color: var(--paper);
  max-width: 720px;
}
.cta-section p {
  font-size: var(--fs-base);
  color: rgba(255, 255, 255, 0.88);
  max-width: 640px;
  margin: 0 0 var(--sp-10);
}
.cta-note {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  margin-top: var(--sp-5);
  letter-spacing: 0.01em;
}

/* ---- Footer (shared Integral chrome) ----------------------------------- */

footer {
  background: var(--paper);
  border-top: 1px solid var(--rule);
  padding: 56px var(--sp-6) var(--sp-10);
  position: relative;
}
footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: var(--sp-6);
  width: 48px;
  height: 2px;
  background: var(--gold);
}
.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--sp-12);
}
.footer-brand .wordmark {
  font-size: 22px;
}
.footer-brand .wordmark-sub {
  font-size: 10px;
  margin-top: 6px;
}
.footer-brand p {
  margin-top: var(--sp-5);
  font-size: 13px;
  color: var(--slate);
  max-width: 320px;
  line-height: var(--lh-body);
}
.footer-col h4 {
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--slate-lighter);
  margin: 0 0 var(--sp-4);
}
.footer-col ul { list-style: none; margin: 0; padding: 0; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a {
  font-size: var(--fs-sm);
  color: var(--ink);
}
.footer-col ul li a:hover {
  color: var(--navy);
  border-bottom: 1px solid var(--gold);
  padding-bottom: 1px;
}
.footer-base {
  max-width: var(--max);
  margin: var(--sp-12) auto 0;
  padding-top: var(--sp-6);
  border-top: 1px solid var(--rule);
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--slate-lighter);
  flex-wrap: wrap;
  gap: var(--sp-4);
}

/* ---- Responsive -------------------------------------------------------- */

@media (max-width: 900px) {
  .hero { padding: 132px 20px 80px; }
  .hero h1 { font-size: var(--fs-4xl); }
  .hero .lede { font-size: 18px; }
  section { padding: 64px 20px; }
  .launch-inner { grid-template-columns: 1fr; gap: var(--sp-8); }
  .card-grid-2 { grid-template-columns: 1fr; }
  .hero-meta { gap: 20px 32px; }
  .footer-inner { grid-template-columns: 1fr 1fr; gap: var(--sp-8); }
  .footer-brand { grid-column: 1 / -1; }
  .cta-section { padding: 72px 20px; }
}

@media (max-width: 520px) {
  .nav-inner { padding: 12px 20px; }
  .wordmark { font-size: 17px; }
  .nav-links { gap: 18px; }
  .nav-links a { font-size: 13px; }
  .hero h1 { font-size: var(--fs-4xl); }
  .launch-date .v { font-size: 24px; }
  .footer-inner { grid-template-columns: 1fr; }
}