/* ==========================================================================
   Enclave — design system replicated from z.cash
   Fonts: DM Serif Display (display) + Inter (UI/body)
   Palette: gold #F3B724 · black #000 · maroon #271219 · warm #F3F1EF
   ========================================================================== */

:root {
  --color-primary: #000000;
  --color-secondary: #271219;
  --color-text: #141529;
  --color-accent: #F3B724;
  --color-accent-hover: #FDC63E;
  /* darker gold for small text on light backgrounds (WCAG AA, ~4.7:1 on white) */
  --color-accent-ink: #9A6A00;
  --color-warm: #F3F1EF;
  --color-white: #FFFFFF;
  --color-gray-light: #F7F7F7;
  --color-gray: #797576;
  --color-beige: #E3DED7;

  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-serif: "DM Serif Display", Georgia, serif;
  --font-mono: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;

  --container: 1160px;
  --header-height: 80px;
}

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

* { margin: 0; }

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

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 300;
  line-height: 1.875em;
  color: var(--color-primary);
  background: var(--color-white);
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--color-accent); text-decoration: none; transition: color 0.2s ease; }
a:hover { color: var(--color-accent-hover); }

ul, ol { padding: 0; list-style: none; }

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

section[id] { scroll-margin-top: calc(var(--header-height) + 12px); }

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 24px;
}

.container.narrow { max-width: 860px; }

.section { padding: 96px 0; }
.section-warm { background: var(--color-warm); }
.section-dark { background: var(--color-secondary); color: var(--color-white); }
.section-dark a { color: var(--color-accent); }

/* ---------- Typography ---------- */
h1, h2, h3, h4, h5 { font-weight: 700; }

h1, .hero-title {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(2.75rem, 7vw, 5.625rem);
  line-height: 1.1em;
  color: var(--color-secondary);
}

.section-title {
  font-family: var(--font-sans);
  font-size: clamp(1.75rem, 4vw, 2.5625rem);
  font-weight: 800;
  text-transform: uppercase;
  line-height: 1.25em;
  color: var(--color-primary);
  margin-bottom: 28px;
  max-width: 20ch;
}

.section-dark .section-title { color: var(--color-white); }
.section-title.center { text-align: center; margin-inline: auto; }

.section-eyebrow,
.eyebrow {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent-ink);
  margin-bottom: 18px;
}

.section-dark .section-eyebrow,
.section-dark .eyebrow { color: var(--color-accent); }

.wp-hero .eyebrow { color: var(--color-accent-ink); }

.section-intro {
  font-size: 1.125rem;
  font-weight: 300;
  line-height: 1.65em;
  max-width: 62ch;
  margin-bottom: 48px;
}

.lead {
  font-size: 1.125rem;
  font-weight: 300;
  line-height: 1.65em;
  margin-bottom: 24px;
}

.lead:last-child { margin-bottom: 0; }

.section-closer {
  margin-top: 56px;
  padding-top: 32px;
  border-top: 1px solid var(--color-beige);
  font-size: 1.125rem;
  font-weight: 300;
  line-height: 1.65em;
  max-width: 62ch;
  margin-inline: auto;
  text-align: center;
}

strong { font-weight: 700; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  line-height: 1.4em;
  padding: 13px 40px;
  border: 1px solid transparent;
  border-radius: 0;
  text-align: center;
  transition: background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}

.btn-dark {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}
.btn-dark:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-primary);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-white);
}


/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-beige);
  transition: box-shadow 0.3s ease;
}

.site-header.is-scrolled { box-shadow: 0 2px 16px rgba(0, 0, 0, 0.08); }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  min-height: var(--header-height);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--color-primary);
}
.brand:hover { color: var(--color-primary); }

.brand-name {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.brand-mark { flex-shrink: 0; }

.main-nav {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-item { position: relative; }

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 10px 14px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-primary);
  transition: color 0.2s ease;
}
.nav-link:hover { color: var(--color-accent-ink); }

.dropdown-toggle {
  width: 100%;
  justify-content: space-between;
  text-align: left;
}

.chev { transition: transform 0.25s ease; }
.has-dropdown.open .chev { transform: rotate(180deg); }

.dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 240px;
  background: var(--color-white);
  border: 1px solid var(--color-beige);
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.1);
  padding: 10px 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.22s ease, transform 0.22s ease, visibility 0.22s;
}

.has-dropdown.open .dropdown-menu,
.has-dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-menu a {
  display: block;
  padding: 9px 22px;
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--color-primary);
}
.dropdown-menu a:hover {
  color: var(--color-accent-ink);
  background: var(--color-gray-light);
}

.nav-cta { white-space: nowrap; }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 8px;
}

.nav-toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: 120px 0 110px;
  text-align: center;
  background: var(--color-white);
}

.hero-glow {
  position: absolute;
  bottom: -140px;
  right: -120px;
  width: 640px;
  height: 640px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(243, 183, 36, 0.35) 0%, rgba(243, 183, 36, 0.08) 45%, transparent 70%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  max-width: 980px;
}

.hero-title { margin-bottom: 28px; }

.hero-sub {
  font-size: clamp(1rem, 2vw, 1.25rem);
  font-weight: 300;
  line-height: 1.75em;
  color: var(--color-primary);
  max-width: 68ch;
  margin: 0 auto 40px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  justify-content: center;
}

/* ---------- Stats band ---------- */
.stats-band {
  background: var(--color-secondary);
  color: var(--color-white);
  padding: 72px 0;
}

.stats-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
  flex-wrap: wrap;
}

.stats-statement {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(2.5rem, 5vw, 4.4375rem);
  line-height: 1.1em;
  color: var(--color-accent);
}

.stats-grid {
  display: flex;
  gap: 56px;
  flex-wrap: wrap;
}

.stat {
  display: flex;
  flex-direction: column-reverse;
}

.stat-value {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 2.8125rem);
  line-height: 1.2em;
  color: var(--color-white);
}

.stat-label {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-beige);
  margin-top: 6px;
}

/* ---------- Trust strip ---------- */
.trust-strip {
  padding: 56px 0;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-beige);
  text-align: center;
}

.trust-title {
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #5F5B5C;
  margin-bottom: 30px;
}

.trust-logos {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 20px 44px;
}

.trust-logos li {
  font-family: var(--font-serif);
  font-size: 1.375rem;
  color: #5F5B5C;
  transition: color 0.25s ease;
}

.trust-logos li:hover { color: var(--color-secondary); }

/* ---------- Market ticker strip ---------- */
.ticker-strip {
  background: var(--color-primary);
  color: var(--color-white);
  padding: 30px 0;
}

.ticker-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 24px 40px;
}

.ticker-item { min-width: 150px; }

.ticker-value {
  font-family: var(--font-serif);
  font-size: clamp(1.375rem, 2.5vw, 1.875rem);
  line-height: 1.2em;
  color: var(--color-accent);
}

.ticker-label {
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.65);
  margin-top: 4px;
}

.ticker-note {
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.25);
  padding: 6px 12px;
}

/* ---------- FAQ ---------- */
.faq-group { margin-bottom: 56px; }
.faq-group:last-child { margin-bottom: 0; }

.faq-group-title {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent-ink);
  margin-bottom: 18px;
}

.faq-item {
  background: var(--color-white);
  border: 1px solid var(--color-beige);
  margin-bottom: 14px;
  transition: border-color 0.2s ease;
}

.faq-item[open] { border-color: var(--color-primary); }

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 20px 24px;
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.4em;
  cursor: pointer;
  list-style: none;
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary:hover { color: var(--color-accent-ink); }

.faq-icon {
  position: relative;
  flex-shrink: 0;
  width: 22px;
  height: 22px;
}

.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  background: var(--color-primary);
  transition: transform 0.25s ease, background-color 0.2s ease;
}

.faq-icon::before {
  left: 0;
  top: 10px;
  width: 22px;
  height: 2px;
}

.faq-icon::after {
  left: 10px;
  top: 0;
  width: 2px;
  height: 22px;
}

.faq-item[open] .faq-icon::after { transform: rotate(90deg); }
.faq-item[open] .faq-icon::before,
.faq-item[open] .faq-icon::after { background: var(--color-accent-ink); }

.faq-body {
  padding: 0 24px 22px;
  max-width: 74ch;
}

.faq-body p {
  font-size: 0.9375rem;
  line-height: 1.8em;
  margin-bottom: 14px;
}

.faq-body p:last-child { margin-bottom: 0; }

.faq-body a { color: var(--color-accent-ink); text-decoration: underline; }


/* ---------- Feature grid (Problem cards) ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--color-white);
  border: 1px solid var(--color-beige);
  padding: 44px 36px;
  transition: border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}

.feature-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-6px);
  box-shadow: 0 18px 44px rgba(39, 18, 25, 0.08);
}

.feature-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 26px;
  color: var(--color-accent);
  background: var(--color-secondary);
  border-radius: 50%;
  padding: 12px;
}

.feature-name {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.3em;
  margin-bottom: 14px;
}

.feature-desc {
  font-size: 0.9375rem;
  line-height: 1.75em;
  color: var(--color-primary);
}

/* ---------- Pipeline (Design) ---------- */
.pipeline {
  display: grid;
  gap: 0;
  margin-bottom: 56px;
}

.pipeline-step {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 32px;
  padding: 44px 0;
  border-top: 1px solid var(--color-beige);
}

.pipeline-step:last-child { border-bottom: 1px solid var(--color-beige); }

.step-number {
  font-family: var(--font-serif);
  font-size: clamp(2.25rem, 4vw, 2.8125rem);
  line-height: 1;
  color: var(--color-accent-ink);
}

.step-title {
  font-size: clamp(1.375rem, 2.5vw, 1.75rem);
  font-weight: 700;
  line-height: 1.3em;
  margin-bottom: 14px;
}

.step-tag {
  font-weight: 300;
  color: var(--color-gray);
  font-size: 0.8em;
}

.pipeline-body p {
  max-width: 72ch;
  line-height: 1.875em;
}

/* ---------- Pull quote ---------- */
.pull-quote {
  border-left: 6px solid var(--color-accent);
  padding: 8px 0 8px 36px;
  max-width: 76ch;
}

.pull-quote p {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(1.25rem, 2.5vw, 1.5625rem);
  line-height: 1.5em;
  color: var(--color-secondary);
}

/* ---------- Invariant (Custody) ---------- */
.invariant {
  background: var(--color-white);
  border-left: 6px solid var(--color-accent);
  padding: 40px 44px;
  margin-bottom: 48px;
}

.invariant p {
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 2.5vw, 1.5625rem);
  line-height: 1.5em;
  color: var(--color-secondary);
}

/* ---------- Detail grid (Custody) ---------- */
.detail-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.detail-item {
  background: var(--color-white);
  border-top: 3px solid var(--color-primary);
  padding: 32px 30px;
  transition: border-top-color 0.25s ease;
}

.detail-item:hover { border-top-color: var(--color-accent); }

.detail-item h4 {
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1.3em;
  margin-bottom: 12px;
}

.detail-item p {
  font-size: 0.9375rem;
  line-height: 1.75em;
}

/* ---------- Split + formula card (Price Integrity) ---------- */
.split {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 48px;
  align-items: start;
}

.split-main p { margin-bottom: 24px; max-width: 68ch; }
.split-main p:last-child { margin-bottom: 0; }

.formula-card {
  background: var(--color-primary);
  color: var(--color-white);
  padding: 40px 36px;
  border-top: 4px solid var(--color-accent);
}

.formula-label {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 20px;
}

.formula {
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  line-height: 1.9em;
  color: var(--color-white);
  margin-bottom: 24px;
}

.formula em {
  font-style: normal;
  color: var(--color-accent);
}

.formula-notes {
  border-top: 1px solid rgba(255, 255, 255, 0.25);
  padding-top: 18px;
}

.formula-notes li {
  font-size: 0.8125rem;
  line-height: 1.7em;
  color: var(--color-beige);
  padding-left: 18px;
  position: relative;
}

.formula-notes li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 7px;
  height: 7px;
  background: var(--color-accent);
  border-radius: 50%;
}

/* ---------- Dark section (Compliance) ---------- */
.section-dark .lead { color: rgba(255, 255, 255, 0.88); }

/* ---------- Arc list ---------- */
.arc-list {
  counter-reset: arc;
  display: grid;
  gap: 0;
}

.arc-list li {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 32px;
  padding: 40px 0;
  border-top: 1px solid var(--color-beige);
}

.arc-list li:last-child { border-bottom: 1px solid var(--color-beige); }

.arc-number {
  font-family: var(--font-serif);
  font-size: clamp(2.25rem, 4vw, 2.8125rem);
  line-height: 1;
  color: var(--color-beige);
  transition: color 0.25s ease;
}

.arc-list li:hover .arc-number { color: var(--color-accent); }

.arc-list h4 {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.3em;
  margin-bottom: 12px;
}

.arc-list p {
  max-width: 72ch;
  line-height: 1.875em;
}

/* ---------- Check grid (Verifiability) ---------- */
.check-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.check-item {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 20px;
  background: var(--color-white);
  border: 1px solid var(--color-beige);
  padding: 32px 28px;
  transition: border-color 0.25s ease;
}

.check-item:hover { border-color: var(--color-accent); }

.check-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-accent);
  color: var(--color-primary);
  padding: 12px;
}

.check-item h4 {
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1.3em;
  margin-bottom: 10px;
}

.check-item p {
  font-size: 0.9375rem;
  line-height: 1.75em;
}

/* ---------- Summary ---------- */
.section-summary { text-align: center; }
.section-summary .section-eyebrow { text-align: center; }

.summary-statement {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.2em;
  color: var(--color-secondary);
  margin-bottom: 36px;
}

.section-summary .hero-actions { margin-top: 40px; }

/* ---------- CTA cards ---------- */
.section-cta { background: var(--color-gray-light); }

.cta-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.cta-card {
  display: flex;
  flex-direction: column;
  background: var(--color-white);
  border-top: 3px solid var(--color-primary);
  padding: 34px 28px 30px;
  color: var(--color-primary);
  transition: border-top-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}

.cta-card:hover {
  border-top-color: var(--color-accent);
  transform: translateY(-6px);
  box-shadow: 0 18px 44px rgba(39, 18, 25, 0.1);
  color: var(--color-primary);
}

.cta-card h4 {
  font-size: 1.125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 12px;
}

.cta-card p {
  font-size: 0.9375rem;
  line-height: 1.7em;
  flex-grow: 1;
}

.cta-arrow {
  font-size: 1.5rem;
  line-height: 1;
  margin-top: 22px;
  color: var(--color-accent-ink);
  transition: transform 0.25s ease;
}

.cta-card:hover .cta-arrow { transform: translateX(6px); }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-secondary);
  color: var(--color-white);
  padding: 80px 0 36px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.3fr 1.7fr;
  gap: 56px;
  padding-bottom: 56px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
}

.footer-brand svg, .footer-brand img { margin-bottom: 28px; }

.footer-statement {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  line-height: 1.25em;
  color: var(--color-white);
  max-width: 14ch;
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.footer-col h5 {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 20px;
}

.footer-col ul { display: grid; gap: 10px; }

.footer-col a {
  font-size: 0.9375rem;
  font-weight: 300;
  color: rgba(255, 255, 255, 0.82);
}
.footer-col a:hover { color: var(--color-accent); }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  padding-top: 30px;
}

.footer-bottom p {
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.6);
}

.footer-legal {
  display: flex;
  gap: 26px;
  flex-wrap: wrap;
}

.footer-legal a {
  font-size: 0.8125rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.6);
}
.footer-legal a:hover { color: var(--color-accent); }

/* ---------- Whitepaper reader page ---------- */
.wp-hero {
  background: var(--color-warm);
  padding: 88px 0 72px;
  border-bottom: 1px solid var(--color-beige);
}

.wp-hero .hero-title { margin-bottom: 20px; }

.wp-subtitle {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(1.375rem, 3vw, 2rem);
  line-height: 1.3em;
  color: var(--color-secondary);
  max-width: 28ch;
}

.wp-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  margin-top: 32px;
}

.wp-meta span {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-gray);
  padding-left: 16px;
  border-left: 3px solid var(--color-accent);
}

.wp-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 64px;
  align-items: start;
  padding: 72px 0 96px;
}

.wp-toc {
  position: sticky;
  top: calc(var(--header-height) + 24px);
  border-top: 3px solid var(--color-primary);
  padding-top: 22px;
}

.wp-toc h2 {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-gray);
  margin-bottom: 16px;
}

.wp-toc ol { display: grid; gap: 4px; counter-reset: toc; }

.wp-toc a {
  display: block;
  padding: 7px 12px;
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--color-primary);
  border-left: 2px solid transparent;
}
.wp-toc a:hover { color: var(--color-accent-ink); background: var(--color-gray-light); }

.wp-toc a.is-active {
  color: var(--color-primary);
  font-weight: 600;
  border-left-color: var(--color-accent);
  background: var(--color-warm);
}

.wp-content > section { padding-bottom: 56px; }
.wp-content > section:last-child { padding-bottom: 0; }

.wp-content h2.wp-heading {
  font-family: var(--font-sans);
  font-size: clamp(1.5rem, 3vw, 2.3125rem);
  font-weight: 700;
  line-height: 1.3em;
  color: var(--color-primary);
  padding-bottom: 16px;
  margin-bottom: 26px;
  border-bottom: 1px solid var(--color-beige);
  scroll-margin-top: calc(var(--header-height) + 24px);
}

.wp-content h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 30px 0 12px;
}

.wp-content p {
  margin-bottom: 20px;
  line-height: 1.875em;
  max-width: 74ch;
}

.wp-content ul.wp-list {
  display: grid;
  gap: 14px;
  margin-bottom: 24px;
  max-width: 74ch;
}

.wp-content ul.wp-list li {
  padding-left: 26px;
  position: relative;
  line-height: 1.8em;
}

.wp-content ul.wp-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 9px;
  height: 9px;
  background: var(--color-accent);
}

.wp-content blockquote.wp-quote {
  background: var(--color-warm);
  border-left: 6px solid var(--color-accent);
  padding: 26px 32px;
  margin: 26px 0;
}

.wp-content blockquote.wp-quote p {
  font-family: var(--font-serif);
  font-size: 1.1875rem;
  line-height: 1.55em;
  color: var(--color-secondary);
  margin-bottom: 0;
}

.wp-content .wp-title-sub {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: 1.375rem;
  color: var(--color-gray);
  margin-top: -12px;
  margin-bottom: 26px;
}

/* ---------- Scroll reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  * { animation-duration: 0.001s !important; transition-duration: 0.001s !important; }
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .section { padding: 76px 0; }

  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .cta-grid { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr; gap: 36px; }

  .footer-top { grid-template-columns: 1fr; gap: 44px; }

  .wp-layout { grid-template-columns: 230px 1fr; gap: 40px; }
}

@media (max-width: 860px) {
  .nav-toggle { display: flex; }

  .main-nav {
    position: fixed;
    inset: var(--header-height) 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-beige);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
    padding: 18px 24px 28px;
    max-height: calc(100vh - var(--header-height));
    overflow-y: auto;
    transform: translateY(-130%);
    transition: transform 0.35s ease;
  }

  .main-nav.is-open { transform: translateY(0); }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav-link {
    width: 100%;
    justify-content: space-between;
    padding: 14px 4px;
    font-size: 1rem;
    border-bottom: 1px solid var(--color-gray-light);
  }

  .dropdown-menu {
    position: static;
    min-width: 0;
    border: none;
    box-shadow: none;
    padding: 0 0 8px;
    opacity: 1;
    visibility: visible;
    transform: none;
    display: none;
  }

  .has-dropdown.open .dropdown-menu { display: block; }

  .dropdown-menu a { padding: 10px 16px; }

  .nav-cta { margin-top: 20px; text-align: center; }
}

@media (max-width: 767px) {
  body { font-size: 1rem; line-height: 1.65em; }

  .section { padding: 60px 0; }

  .hero { padding: 84px 0 76px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; }

  .stats-inner { flex-direction: column; align-items: flex-start; gap: 36px; }
  .stats-grid { gap: 32px; flex-direction: column; }

  .feature-grid { grid-template-columns: 1fr; }
  .detail-grid { grid-template-columns: 1fr; }
  .check-grid { grid-template-columns: 1fr; }
  .cta-grid { grid-template-columns: 1fr; }

  .pipeline-step,
  .arc-list li {
    grid-template-columns: 1fr;
    gap: 14px;
    padding: 32px 0;
  }

  .invariant { padding: 28px 24px; }

  .footer-cols { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }

  .wp-layout { grid-template-columns: 1fr; gap: 36px; padding-top: 48px; }

  .wp-toc {
    position: static;
    background: var(--color-gray-light);
    padding: 22px 18px;
    border-top: 3px solid var(--color-primary);
  }

  .wp-hero { padding: 56px 0 48px; }
  .wp-meta { flex-direction: column; gap: 10px; }
}