/* ============================================================
   INTUILECTIVE — site stylesheet
   Brand system locked June 2026.
   Ink / Bone / Brass / Slate. White grounds. Space Grotesk.
   Brass is an accent only: the Z in TEZERA, the live field in the
   decision record, and hairline rules. Never a fill, never a gradient.
   ============================================================ */

@font-face {
  font-family: 'Space Grotesk';
  src: url('fonts/SpaceGrotesk-var.woff2') format('woff2-variations');
  font-weight: 300 700;
  font-display: swap;
}

:root {
  --ink:        #0C0D12;
  --ink-soft:   #33353E;
  --slate:      #6B7280;
  --brass:      #C2922E;
  --bone:       #F2EEE6;
  --paper:      #FFFFFF;
  --rule:       #E3E0D9;
  --rule-firm:  #C9C5BC;

  --font: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI',
          Helvetica, Arial, sans-serif;

  --pad: clamp(20px, 5vw, 72px);
  --max: 1200px;
}

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; overflow-x: hidden; width: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.62;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  width: 100%;
}

img, svg { display: block; max-width: 100%; shape-rendering: geometricPrecision; }
a { color: inherit; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

:focus-visible { outline: 2px solid var(--brass); outline-offset: 3px; }

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--ink); color: #fff; padding: 12px 18px; z-index: 200;
}
.skip-link:focus { left: 0; }

/* ---------------------------------------------------------- type scale */
h1, h2, h3 { margin: 0; font-weight: 500; letter-spacing: -0.028em; text-rendering: optimizeLegibility; }
h1 { font-size: clamp(2.4rem, 5.6vw, 4.2rem); line-height: 1.04; }
h2 { font-size: clamp(1.8rem, 3.4vw, 2.7rem); line-height: 1.1; }
h3 { font-size: clamp(1.1rem, 1.7vw, 1.3rem); line-height: 1.28; letter-spacing: -0.016em; }

p { margin: 0 0 1.05em; }
p:last-child { margin-bottom: 0; }

.lede {
  font-size: clamp(1.08rem, 1.7vw, 1.3rem);
  line-height: 1.48;
  letter-spacing: -0.014em;
  color: var(--ink-soft);
}
.muted { color: var(--slate); }
.measure { max-width: 62ch; }
.measure-narrow { max-width: 46ch; }

/* ---------------------------------------------------------- shell */
.container {
  max-width: var(--max);
  margin: 0 auto;
  padding-left: var(--pad);
  padding-right: var(--pad);
  width: 100%;
}

.section { padding: clamp(60px, 8vw, 110px) 0; border-top: 1px solid var(--rule); background: var(--paper); }
.section-open { border-top: 0; }
.section-bone { background: #F4F0E8; color: var(--ink); border-top: 1px solid var(--rule-firm); }
.section-bone .lede { color: var(--ink-soft); }
.section-bone .muted { color: var(--slate); }
.section-bone .pull { border-left-color: var(--brass); color: var(--ink); }
.section-bone .record { background: #FFFFFF; border-color: var(--rule-firm); }
.section-bone .pair > div { background: #FFFFFF; }
.section-bone .define { background: #FFFFFF; border: 1px solid var(--rule-firm); border-left: 4px solid var(--ink); }

.section-dark { background: var(--ink); color: #FFFFFF; border-top: 0; }
.section-dark h1, .section-dark h2, .section-dark h3 { color: #FFFFFF; }
.section-dark p { color: #F2EEE6; }
.section-dark .prose p { color: #F2EEE6; }
.section-dark .lede { color: #FFFFFF !important; opacity: 0.95; }
.section-dark .muted { color: #D3CEC5; }
.section-dark .rule-firm { border-color: #2B2D34; }
.section-dark .plainlist li { color: #E3E0D9; border-color: #2B2D34; }
.section-dark .ledger-row dd { color: #E3E0D9; }


/* ---------------------------------------------------------- header */
.site-header {
  position: sticky; top: 0; z-index: 80;
  background: rgba(255,255,255,0.96);
  -webkit-backdrop-filter: saturate(150%) blur(10px);
  backdrop-filter: saturate(150%) blur(10px);
  border-bottom: 1px solid var(--rule);
  transform: translateZ(0);
  will-change: transform;
}
.nav-wrap {
  display: flex; align-items: center; gap: 28px; height: 72px;
  position: relative;
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; flex-shrink: 0; }
.brand svg { width: 22px; height: 22px; }
.brand-word { font-size: 17px; font-weight: 600; letter-spacing: 0.055em; }

.nav { display: flex; align-items: center; gap: 24px; margin-left: auto; }
.nav a:not(.btn) {
  font-size: 14.5px; color: var(--slate); text-decoration: none;
  padding: 6px 0; border-bottom: 2px solid transparent;
  transition: color .18s ease, border-color .18s ease;
}
.nav a:not(.btn):hover { color: var(--ink); }
.nav a:not(.btn)[aria-current="page"] { color: var(--ink); font-weight: 500; border-bottom-color: var(--brass); }

.nav a.btn {
  font-size: 14.5px; font-weight: 500; text-decoration: none;
  padding: 10px 20px; color: #FFFFFF !important; background: var(--ink);
  border: 1px solid var(--ink); border-bottom: 1px solid var(--ink);
  transition: background .18s ease, border-color .18s ease, color .18s ease;
  line-height: 1.2; display: inline-flex; align-items: center; justify-content: center;
}
.nav a.btn:hover {
  background: var(--brass); border-color: var(--brass); color: #FFFFFF !important;
}

.menu-btn { display: none; margin-left: auto; padding: 8px 4px; font-size: 14.5px; }

/* ---------------------------------------------------------- buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 24px; font-size: 14.5px; font-weight: 500;
  text-decoration: none; border: 1px solid var(--ink); background: var(--ink); color: #fff;
  transition: background .18s ease, border-color .18s ease, color .18s ease;
}
.btn:hover { background: var(--brass); border-color: var(--brass); }
.btn-secondary { background: none; color: var(--ink); border-color: var(--rule-firm); }
.btn-secondary:hover { background: none; color: var(--brass); border-color: var(--brass); }
.btn-onink { background: var(--bone); border-color: var(--bone); color: var(--ink); }
.btn-onink:hover { background: var(--brass); border-color: var(--brass); color: #fff; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }

/* ---------------------------------------------------------- hero */
.hero { padding: clamp(52px, 7vw, 92px) 0 clamp(56px, 7vw, 96px); }
.hero-grid {
  display: grid; grid-template-columns: 1.04fr 0.96fr;
  gap: clamp(36px, 5vw, 70px); align-items: start;
}
.hero h1 .quiet { color: var(--slate); }
.hero-sub { margin-top: 24px; max-width: 34ch; }
.hero-body { margin-top: 20px; max-width: 50ch; color: var(--slate); font-size: 16px; }
.triad {
  margin-top: 24px; padding-top: 16px; border-top: 1px solid var(--rule);
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  font-size: 13.5px; font-weight: 600; letter-spacing: 0.05em; text-transform: uppercase; color: var(--ink);
}
.triad b {
  font-weight: 600;
  display: inline-flex; align-items: center; gap: 10px;
}
.triad b:not(:last-child)::after {
  content: "•";
  color: var(--brass);
  font-weight: 400;
}

/* ------------------------------------------------- signature: the record */
.record { border: 1px solid var(--rule-firm); background: #fff; }
.record-head {
  display: flex; justify-content: space-between; align-items: baseline; gap: 14px;
  padding: 15px 20px; border-bottom: 1px solid var(--ink);
  font-size: 13.5px; font-weight: 500;
}
.record-head span { color: var(--slate); font-weight: 400; font-variant-numeric: tabular-nums; }
.record-row {
  display: grid; grid-template-columns: minmax(112px, 0.6fr) 1fr; gap: 16px;
  padding: 13px 20px; border-bottom: 1px solid var(--rule); align-items: baseline;
}
.record-row:last-of-type { border-bottom: 0; }
.record-key { font-size: 13.5px; color: var(--slate); }
.record-val { font-size: 14.5px; letter-spacing: -0.008em; }
.record-live { background: #FCFBF9; }
.record-live .record-val { color: var(--brass); }
.record-caret {
  display: inline-block; width: 6px; height: 13px; background: var(--brass);
  vertical-align: -1px; margin-left: 4px; animation: caret 1.15s steps(1, end) infinite;
}
@keyframes caret { 0%, 49% { opacity: 1; } 50%, 100% { opacity: 0; } }
.record-foot {
  padding: 15px 20px; border-top: 1px solid var(--ink);
  font-size: 13.5px; line-height: 1.55; color: var(--slate);
}
.record-foot b { color: var(--ink); font-weight: 500; }
.record-count { color: var(--brass); }

/* ---------------------------------------------------------- ledger */
.ledger { margin-top: 40px; border-top: 1px solid var(--ink); }
.ledger-row {
  display: grid; grid-template-columns: minmax(150px, 0.8fr) minmax(120px, 0.65fr) 1.9fr;
  gap: clamp(14px, 3vw, 44px); padding: 22px 0;
  border-bottom: 1px solid var(--rule); align-items: baseline;
}
.ledger-row dt { font-size: 17px; font-weight: 500; letter-spacing: -0.016em; }
.ledger-verb { font-size: 14.5px; color: var(--slate); }
.ledger-row dd { margin: 0; color: var(--slate); font-size: 15.5px; max-width: 56ch; }
.ledger-us { border-bottom: 1px solid var(--ink); }
.ledger-us dt { color: var(--ink); }
.ledger-us .ledger-verb { color: var(--brass); }
.ledger-us dd { color: var(--ink-soft); }

/* ---------------------------------------------------------- pull quote */
.pull {
  margin-top: 44px; padding-left: 22px; border-left: 2px solid var(--brass);
  font-size: clamp(1.2rem, 2.2vw, 1.7rem); line-height: 1.24;
  letter-spacing: -0.024em; font-weight: 500; max-width: 24ch;
}

/* ---------------------------------------------------------- columns */
.split {
  display: grid; grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.3fr);
  gap: clamp(28px, 5vw, 80px); align-items: start;
}
.trio { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(20px, 3vw, 32px); margin-top: 44px; }
.trio > div {
  background: #FFFFFF; border: 1px solid var(--rule-firm);
  border-top: 3px solid var(--ink); padding: clamp(22px, 2.5vw, 30px);
}
.trio > div:nth-child(even) { background: #F4F0E8; }
.trio h3 { margin-bottom: 14px; text-transform: uppercase; letter-spacing: 0.06em; font-weight: 600; }
.trio p { color: var(--slate); font-size: 15.5px; }
.trio em { font-style: normal; color: var(--ink); font-weight: 500; }
.section-bone .trio > div { background: #FFFFFF; border-top-color: var(--ink); }
.section-bone .trio > div:nth-child(even) { background: #EAE5DB; }
.section-dark .trio > div { background: #151720; border: 1px solid #2B2D34; border-top: 3px solid var(--brass); }
.section-dark .trio > div:nth-child(even) { background: #1E202B; }
.section-dark .trio p { color: #A7A29A; }
.section-dark .trio em { color: var(--bone); }

.pair { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; margin-top: 42px; background: var(--rule-firm); border: 1px solid var(--rule-firm); }
.pair > div { background: #FFFFFF; padding: clamp(24px, 3.2vw, 36px); transition: background .18s ease; }
.pair > div:nth-child(even) { background: #F4F0E8; }
.pair > div:hover { background: #EBE6DC; }
.pair h3 { margin-bottom: 10px; }
.pair p { color: var(--slate); font-size: 15.5px; }

.section-bone .pair > div { background: #FFFFFF; }
.section-bone .pair > div:nth-child(even) { background: #E8E3D8; }
.section-bone .pair > div:hover { background: #DDD8CC; }

/* ---------------------------------------------------------- lists */
.plainlist { list-style: none; margin: 26px 0 0; padding: 0; border-top: 1px solid var(--rule); max-width: 62ch; }
.plainlist li { padding: 14px 10px 14px 26px; border-bottom: 1px solid var(--rule); color: var(--slate); font-size: 15.5px; position: relative; }
.plainlist li:nth-child(even) { background: rgba(0, 0, 0, 0.025); }
.plainlist li::before { content: ""; position: absolute; left: 8px; top: 23px; width: 11px; height: 1px; background: var(--brass); }

.steps { margin-top: 38px; border-top: 1px solid var(--rule); counter-reset: step; }
.steps li { list-style: none; display: grid; grid-template-columns: 48px 1fr; gap: clamp(12px, 2vw, 26px); padding: 16px 10px; border-bottom: 1px solid var(--rule); }
.steps li:nth-child(even) { background: rgba(0, 0, 0, 0.03); }
.steps li::before { counter-increment: step; content: counter(step, decimal-leading-zero); color: var(--brass); font-size: 14px; padding-top: 3px; font-variant-numeric: tabular-nums; }
.steps b { font-weight: 500; }
.steps span { color: var(--slate); font-size: 15.5px; }
.section-dark .steps, .section-dark .steps li { border-color: #2B2D34; }
.section-dark .steps li:nth-child(even) { background: rgba(255, 255, 255, 0.04); }
.section-dark .steps span { color: #A7A29A; }
.steps ol, ol.steps { margin: 38px 0 0; padding: 0; }


.chain { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 34px; }
.chain li { list-style: none; border: 1px solid var(--rule-firm); padding: 10px 16px; font-size: 14px; }
.section-dark .chain li { border-color: #3A3C44; }
.chain li:last-child { border-color: var(--brass); color: var(--brass); }
.chain .arrow { border: 0; padding: 0; color: var(--brass); }

/* ---------------------------------------------------------- definition */
.define { margin: 40px 0 0; padding: clamp(26px, 3.4vw, 40px); border: 1px solid var(--ink); }
.define p { font-size: clamp(1.08rem, 1.85vw, 1.4rem); line-height: 1.34; letter-spacing: -0.02em; font-weight: 500; max-width: 46ch; }

/* ---------------------------------------------------------- stack diagram */
.stack { margin-top: 40px; max-width: 640px; }
.stack-layer { border: 1px solid var(--rule-firm); padding: 19px 24px; text-align: center; font-size: 14.5px; color: var(--slate); background: #FFFFFF; }
.stack-core { background: var(--ink); border-color: var(--ink); color: #fff; padding: 26px 24px; }
.stack-core b { display: block; font-size: 1.45rem; font-weight: 600; letter-spacing: 0.055em; white-space: nowrap; }
.stack-core b .z { color: var(--brass); display: inline !important; }
.stack-core > span { display: block; margin-top: 8px; color: #A7A29A; font-size: 14px; }
.stack-join { text-align: center; color: var(--brass); padding: 9px 0; line-height: 1; }

.z, span.z { display: inline !important; color: var(--brass); white-space: nowrap; }

/* ---------------------------------------------------------- divisions */
.divisions { margin-top: 44px; border-top: 1px solid var(--ink); }
.division { display: grid; grid-template-columns: minmax(150px, 0.5fr) 1fr; gap: clamp(16px, 3vw, 44px); padding: 28px 0; border-bottom: 1px solid var(--rule); align-items: start; }
.division h3 .z { color: var(--brass); }
.division-role { display: block; margin-top: 6px; font-size: 14px; color: var(--slate); }
.division p { color: var(--slate); font-size: 15.5px; max-width: 58ch; }

/* ---------------------------------------------------------- prose page */
.prose { max-width: 66ch; }
.prose h2 { margin: 2em 0 0.6em; }
.prose h3 { margin: 1.9em 0 0.55em; }
.prose p { color: var(--slate); }
.prose .lede { color: var(--ink-soft); }

/* ---------------------------------------------------------- footer */
.site-footer { border-top: 1px solid var(--ink); padding: 48px 0 40px; background: #FFFFFF; }
.footer-grid { display: flex; justify-content: space-between; gap: 36px; flex-wrap: wrap; align-items: flex-start; }
.footer-links { display: flex; flex-direction: column; gap: 10px; font-size: 14.5px; }
@media (min-width: 640px) {
  .footer-links { display: grid; grid-template-columns: repeat(2, minmax(140px, auto)); gap: 10px 36px; }
}
.footer-links a { color: var(--slate); text-decoration: none; transition: color .18s ease; display: inline-block; }
.footer-links a:hover { color: var(--brass); }
.footer-legal { margin-top: 34px; padding-top: 20px; border-top: 1px solid var(--rule); font-size: 13px; color: var(--slate); line-height: 1.75; }
.footer-legal .z { color: var(--brass); }


/* ---------------------------------------------------------- motion */
.reveal { opacity: 0; transform: translateY(12px); transition: opacity .65s cubic-bezier(.2,.7,.3,1), transform .65s cubic-bezier(.2,.7,.3,1); }
.reveal.is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}

/* ---------------------------------------------------------- responsive */
@media (max-width: 980px) {
  .hero-grid, .split { grid-template-columns: 1fr; }
  .trio { grid-template-columns: 1fr; }
  .ledger-row { grid-template-columns: 1fr; gap: 6px; }
  .ledger-row dd { max-width: none; }
  .division { grid-template-columns: 1fr; gap: 10px; }
}
@media (max-width: 860px) {
  .nav {
    display: none; position: absolute; top: 72px; left: 0; right: 0;
    background: #fff; border-bottom: 1px solid var(--rule);
    flex-direction: column; align-items: stretch; gap: 0;
    padding: 6px var(--pad) 22px;
  }
  .nav.is-open { display: flex; }
  .nav a { padding: 13px 0; border-bottom: 1px solid var(--rule); font-size: 15.5px; }
  .nav .btn { margin-top: 16px; align-self: flex-start; }
  .menu-btn { display: block; }
}
@media (max-width: 700px) {
  body { font-size: 16px; }
  .pair { grid-template-columns: 1fr; }
  .record-row { grid-template-columns: 1fr; gap: 4px; padding: 12px 16px; }
  .record-head, .record-foot { padding-left: 16px; padding-right: 16px; }
  .steps li { grid-template-columns: 34px 1fr; }
}