/* ================================================
   CoreSense Marketing Site — Stylesheet
   MVP-6c — www.coresense.ai
   ================================================ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background-color: var(--surface-enlighten-page);
  color: var(--text-enlighten-primary);
  -webkit-font-smoothing: antialiased;
}

/* ------------------------------------------------
   SHARED LAYOUT
   ------------------------------------------------ */
.section-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 var(--space-8);
}

.section-inner--narrow {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 var(--space-8);
}

/* Full-bleed surface sections */
.section-discovery {
  background-color: var(--surface-discovery-page);
  color: var(--text-discovery-primary);
}

.section-enlighten {
  background-color: var(--surface-enlighten-page);
  color: var(--text-enlighten-primary);
}

/* ------------------------------------------------
   EYEBROW / SECTION LABELS
   ------------------------------------------------ */
.eyebrow {
  font-family: var(--font-sans);
  font-size: var(--text-label);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-overline);
  text-transform: uppercase;
  color: var(--text-enlighten-tertiary);
  margin-bottom: var(--space-4);
}

.eyebrow--discovery {
  color: var(--color-magenta-neon);
}

/* ------------------------------------------------
   NAVIGATION
   ------------------------------------------------ */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  background-color: var(--surface-discovery-page);
  border-bottom: 1px solid var(--surface-discovery-border);
  height: 64px;
  display: flex;
  align-items: center;
}

.site-nav-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 var(--space-8);
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

.nav-wordmark {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-sans);
  font-size: var(--text-h4);
  font-weight: var(--weight-bold);
  color: var(--color-signal);
  text-decoration: none;
  letter-spacing: -0.01em;
  flex-shrink: 0;
}

.nav-logo { height: 28px; width: auto; display: block; }

.footer-brand-lockup {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.footer-logo { height: 24px; width: auto; display: block; }

.founder-photo { object-position: top; }

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  list-style: none;
}

.nav-links a {
  font-family: var(--font-sans);
  font-size: var(--text-caption);
  font-weight: var(--weight-medium);
  color: var(--text-discovery-secondary);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-hover);
}

.nav-links a:hover { color: var(--text-discovery-primary); }

.nav-cta {
  display: none; /* shown via JS after scroll */
  padding: var(--space-2) var(--space-4);
  background: var(--color-magenta-neon);
  color: white;
  border: none;
  border-radius: var(--btn-radius);
  font-family: var(--btn-font);
  font-size: var(--text-label);
  font-weight: var(--btn-weight);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: box-shadow var(--duration-fast) var(--ease-hover);
}

.nav-cta:hover { box-shadow: var(--glow-magenta-md); }
.nav-cta.visible { display: inline-block; }

/* ------------------------------------------------
   BUTTONS
   ------------------------------------------------ */
.btn-marketing {
  display: inline-block;
  padding: var(--space-4) var(--space-8);
  border: none;
  border-radius: var(--btn-radius);
  font-family: var(--btn-font);
  font-size: var(--btn-size);
  font-weight: var(--btn-weight);
  cursor: pointer;
  text-decoration: none;
  transition:
    box-shadow var(--duration-fast) var(--ease-hover),
    opacity    var(--duration-fast) var(--ease-hover);
}

.btn-marketing--primary {
  background: var(--color-magenta-neon);
  color: white;
  box-shadow: var(--btn-primary-shadow);
}

.btn-marketing--primary:hover { box-shadow: var(--glow-magenta-lg); }

.btn-marketing--ghost {
  background: transparent;
  color: var(--text-discovery-secondary);
  border: 1px solid rgba(255, 255, 255, 0.25);
}

.btn-marketing--ghost:hover {
  color: var(--text-discovery-primary);
  border-color: rgba(255, 255, 255, 0.45);
}

.btn-marketing--teal {
  background: var(--color-teal-jewel);
  color: white;
}

.btn-marketing--teal:hover { opacity: 0.88; }

/* ------------------------------------------------
   SECTION 1 — HERO
   ------------------------------------------------ */
#hero {
  padding: 140px 0 96px;
}

.hero-label {
  display: inline-block;
  font-size: var(--text-label);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-overline);
  text-transform: uppercase;
  color: var(--color-teal-jewel);
  margin-bottom: var(--space-6);
}

.hero-headline {
  font-family: var(--font-display);
  font-size: clamp(42px, 5vw, 68px);
  font-weight: var(--weight-bold);
  font-style: italic;
  line-height: 1.05;
  color: var(--text-enlighten-primary);
  margin-bottom: var(--space-6);
  max-width: 700px;
}

.hero-headline em {
  font-style: italic;
  color: var(--color-signal);
}

.hero-subhead {
  font-size: var(--text-body-large);
  color: var(--text-enlighten-secondary);
  line-height: var(--leading-body-large);
  max-width: 560px;
  margin-bottom: var(--space-8);
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.hero-secondary-cta {
  font-family: var(--font-sans);
  font-size: var(--text-body);
  font-weight: var(--weight-medium);
  color: var(--text-enlighten-secondary);
  text-decoration: underline;
  text-underline-offset: 3px;
  cursor: pointer;
  background: none;
  border: none;
  transition: color var(--duration-fast) var(--ease-hover);
}

.hero-secondary-cta:hover { color: var(--color-signal); }

/* ------------------------------------------------
   SECTION 2 — THE PROBLEM
   ------------------------------------------------ */
#problem {
  padding: 96px 0;
}

.problem-headline {
  font-family: var(--font-display);
  font-size: clamp(30px, 4vw, 44px);
  font-weight: var(--weight-bold);
  font-style: italic;
  line-height: var(--leading-h2);
  color: var(--text-discovery-primary);
  margin-bottom: var(--space-8);
  max-width: 680px;
}

.problem-body {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  max-width: 680px;
  margin-bottom: var(--space-8);
}

.problem-body p {
  font-size: var(--text-body);
  color: var(--text-discovery-secondary);
  line-height: var(--leading-body);
}

.problem-callout {
  border-left: 3px solid var(--color-signal);
  padding: var(--space-4) var(--space-6);
  max-width: 680px;
}

.problem-callout p {
  font-family: var(--font-display);
  font-size: var(--text-body-large);
  font-style: italic;
  color: var(--color-signal-glow);
  line-height: var(--leading-body-large);
}

/* ------------------------------------------------
   SECTION 3 — WHAT CORESENSE IS
   ------------------------------------------------ */
#thesis {
  padding: 96px 0;
}

.thesis-headline {
  font-family: var(--font-display);
  font-size: clamp(30px, 4vw, 48px);
  font-weight: var(--weight-bold);
  font-style: italic;
  line-height: var(--leading-h2);
  color: var(--text-enlighten-primary);
  margin-bottom: var(--space-8);
  max-width: 620px;
}

.thesis-body {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  max-width: 680px;
  margin-bottom: var(--space-12);
}

.thesis-body p {
  font-size: var(--text-body);
  color: var(--text-enlighten-secondary);
  line-height: var(--leading-body);
}

.thesis-structure {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: var(--space-4);
  align-items: center;
  background: var(--surface-enlighten-card);
  border: 1px solid var(--surface-enlighten-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
}

.thesis-node {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  text-align: center;
}

.thesis-node-label {
  font-family: var(--font-sans);
  font-size: var(--text-label);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-overline);
  text-transform: uppercase;
  color: var(--color-signal);
}

.thesis-node-desc {
  font-size: var(--text-caption);
  color: var(--text-enlighten-secondary);
  line-height: var(--leading-caption);
}

.thesis-arrow {
  font-size: var(--text-h3);
  color: var(--surface-enlighten-border-subtle);
  text-align: center;
  user-select: none;
}

/* ------------------------------------------------
   SECTION 4 — HOW IT WORKS
   ------------------------------------------------ */
#how-it-works {
  padding: 96px 0;
  border-top: 1px solid var(--surface-enlighten-border);
}

.how-headline {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.5vw, 40px);
  font-weight: var(--weight-bold);
  font-style: italic;
  line-height: var(--leading-h2);
  color: var(--text-enlighten-primary);
  margin-bottom: var(--space-2);
}

.how-subhead {
  font-size: var(--text-body);
  color: var(--text-enlighten-tertiary);
  margin-bottom: var(--space-8);
  max-width: 560px;
}

.how-tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--surface-enlighten-border);
  margin-bottom: var(--space-8);
}

.how-tab {
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-sans);
  font-size: var(--text-caption);
  font-weight: var(--weight-medium);
  color: var(--text-enlighten-tertiary);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  cursor: pointer;
  transition: color var(--duration-fast) var(--ease-hover), border-color var(--duration-fast) var(--ease-hover);
}

.how-tab:hover { color: var(--text-enlighten-primary); }

.how-tab.active {
  color: var(--color-signal);
  border-bottom-color: var(--color-signal);
  font-weight: var(--weight-bold);
}

.how-pane { display: none; }
.how-pane.active { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-12); align-items: start; }

.how-pane-label {
  font-size: var(--text-label);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-overline);
  text-transform: uppercase;
  color: var(--color-teal-jewel);
  margin-bottom: var(--space-2);
}

.how-pane-sublabel {
  font-size: var(--text-label);
  color: var(--text-enlighten-tertiary);
  margin-bottom: var(--space-4);
}

.how-pane-headline {
  font-family: var(--font-display);
  font-size: var(--text-h3);
  font-weight: var(--weight-bold);
  font-style: italic;
  color: var(--text-enlighten-primary);
  line-height: var(--leading-h3);
  margin-bottom: var(--space-4);
}

.how-pane-body {
  font-size: var(--text-body);
  color: var(--text-enlighten-secondary);
  line-height: var(--leading-body);
}

.how-pane-callout {
  border-left: 3px solid var(--color-teal-jewel);
  padding: var(--space-4) var(--space-6);
  background: var(--surface-enlighten-card);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--text-caption);
  color: var(--text-enlighten-secondary);
  line-height: var(--leading-body);
  margin-top: var(--space-4);
}

.how-pane-visual {
  background: var(--surface-enlighten-card);
  border: 1px solid var(--surface-enlighten-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.how-visual-label {
  font-size: var(--text-label);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-overline);
  text-transform: uppercase;
  color: var(--text-enlighten-tertiary);
}

.how-visual-row {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--surface-enlighten-border);
}

.how-visual-row:last-child { border-bottom: none; }

.how-visual-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  flex-shrink: 0;
}

.how-visual-dot--head   { background: var(--color-signal); }
.how-visual-dot--heart  { background: var(--layer-heart-light); }
.how-visual-dot--hands  { background: var(--layer-hands-light); }

.how-visual-text {
  font-size: var(--text-caption);
  color: var(--text-enlighten-secondary);
}

/* ------------------------------------------------
   SECTION 5 — THE DIFFERENTIATOR
   ------------------------------------------------ */
#differentiator {
  padding: 96px 0;
}

.diff-headline {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.5vw, 40px);
  font-weight: var(--weight-bold);
  font-style: italic;
  line-height: var(--leading-h2);
  color: var(--text-discovery-primary);
  margin-bottom: var(--space-8);
  max-width: 720px;
}

.diff-body {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  max-width: 680px;
  margin-bottom: var(--space-8);
}

.diff-body p {
  font-size: var(--text-body);
  color: var(--text-discovery-secondary);
  line-height: var(--leading-body);
}

/* Comparison table */
.diff-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--space-8);
}

.diff-table thead th {
  font-size: var(--text-label);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--text-discovery-tertiary);
  padding: var(--space-3) var(--space-4);
  text-align: left;
  border-bottom: 1px solid var(--surface-discovery-border);
}

.diff-table tbody td {
  font-size: var(--text-caption);
  color: var(--text-discovery-secondary);
  padding: var(--space-4);
  border-bottom: 1px solid var(--surface-discovery-border);
  vertical-align: top;
  line-height: var(--leading-caption);
}

.diff-table tbody tr:last-child td { border-bottom: none; }

.diff-table tbody tr td:first-child {
  font-weight: var(--weight-bold);
  color: var(--text-discovery-primary);
}

/* CoreSense row — distinct treatment */
.diff-table tbody tr.diff-row--coresense td {
  background: rgba(0, 229, 204, 0.06);
  border-top: 1px solid rgba(0, 229, 204, 0.20);
  border-bottom: 1px solid rgba(0, 229, 204, 0.20);
  color: var(--text-discovery-primary);
}

.diff-table tbody tr.diff-row--coresense td:first-child {
  color: var(--color-teal-neon);
  border-left: 3px solid var(--color-teal-neon);
  padding-left: calc(var(--space-4) - 3px);
}

.diff-statement {
  font-family: var(--font-display);
  font-size: clamp(18px, 2.5vw, 26px);
  font-style: italic;
  color: var(--color-signal-glow);
  text-align: center;
  max-width: 680px;
  margin: 0 auto var(--space-8);
  line-height: var(--leading-h3);
}

.diff-cta {
  display: flex;
  justify-content: center;
}

/* ------------------------------------------------
   SECTION 6 — FOR TEAMS
   ------------------------------------------------ */
#for-teams {
  padding: 96px 0;
}

.teams-headline {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.5vw, 40px);
  font-weight: var(--weight-bold);
  font-style: italic;
  line-height: var(--leading-h2);
  color: var(--text-enlighten-primary);
  margin-bottom: var(--space-4);
  max-width: 680px;
}

.teams-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.team-card {
  background: var(--surface-enlighten-card);
  border: 1px solid var(--surface-enlighten-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.team-card-label {
  font-size: var(--text-label);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--color-teal-jewel);
}

.team-card-headline {
  font-family: var(--font-sans);
  font-size: var(--text-body-large);
  font-weight: var(--weight-bold);
  color: var(--text-enlighten-primary);
  line-height: var(--leading-h3);
}

.team-card-body {
  font-size: var(--text-caption);
  color: var(--text-enlighten-secondary);
  line-height: var(--leading-caption);
}

/* ------------------------------------------------
   SECTION 7 — ARCHITECTURE OF TRUST
   ------------------------------------------------ */
#trust {
  padding: 96px 0;
  border-top: 1px solid var(--surface-enlighten-border);
}

.trust-headline {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.5vw, 40px);
  font-weight: var(--weight-bold);
  font-style: italic;
  line-height: var(--leading-h2);
  color: var(--text-enlighten-primary);
  margin-bottom: var(--space-8);
  max-width: 680px;
}

.trust-body {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  max-width: 680px;
  margin-bottom: var(--space-8);
}

.trust-body p {
  font-size: var(--text-body);
  color: var(--text-enlighten-secondary);
  line-height: var(--leading-body);
}

.trust-principles {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

.trust-principle {
  background: var(--surface-enlighten-card);
  border: 1px solid var(--surface-enlighten-border);
  border-left: 3px solid var(--color-teal-jewel);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: var(--space-4) var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.trust-principle strong {
  font-size: var(--text-caption);
  font-weight: var(--weight-bold);
  color: var(--text-enlighten-primary);
}

.trust-principle p {
  font-size: var(--text-label);
  color: var(--text-enlighten-secondary);
  line-height: var(--leading-caption);
}

/* ------------------------------------------------
   SECTION 8 — CTA
   ------------------------------------------------ */
#cta-section {
  padding: 96px 0;
}

.cta-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  max-width: 620px;
  margin: 0 auto;
}

.cta-headline {
  font-family: var(--font-display);
  font-size: clamp(30px, 4vw, 48px);
  font-weight: var(--weight-bold);
  font-style: italic;
  color: var(--text-discovery-primary);
  line-height: var(--leading-h2);
  margin-bottom: var(--space-6);
}

.cta-subhead {
  font-size: var(--text-body);
  color: var(--text-discovery-secondary);
  line-height: var(--leading-body);
  margin-bottom: var(--space-8);
  max-width: 480px;
}

.cta-trust-signal {
  margin-top: var(--space-4);
  font-size: var(--text-label);
  color: var(--text-discovery-tertiary);
}

/* ------------------------------------------------
   SECTION 9 — FOOTER
   ------------------------------------------------ */
.site-footer {
  background-color: var(--surface-discovery-page);
  border-top: 1px solid var(--surface-discovery-border);
  padding: var(--space-12) 0 var(--space-8);
}

.footer-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 var(--space-8);
}

.footer-top {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

.footer-brand-name {
  font-family: var(--font-sans);
  font-size: var(--text-h4);
  font-weight: var(--weight-bold);
  color: var(--color-signal);
  letter-spacing: -0.01em;
  margin-bottom: var(--space-2);
}

.footer-brand-tagline {
  font-size: var(--text-caption);
  color: var(--text-discovery-tertiary);
  line-height: var(--leading-caption);
}

.footer-nav-label {
  font-size: var(--text-label);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-overline);
  text-transform: uppercase;
  color: var(--text-discovery-tertiary);
  margin-bottom: var(--space-4);
}

.footer-nav-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-nav-links a {
  font-size: var(--text-caption);
  color: var(--text-discovery-secondary);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-hover);
}

.footer-nav-links a:hover { color: var(--text-discovery-primary); }

.footer-bottom {
  border-top: 1px solid var(--surface-discovery-border);
  padding-top: var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.footer-legal {
  font-size: var(--text-label);
  color: var(--text-discovery-tertiary);
}

/* ------------------------------------------------
   HERO — SUB-STATEMENT
   ------------------------------------------------ */
.hero-sub-statement {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(20px, 2.5vw, 26px);
  color: var(--color-signal);
  line-height: var(--leading-h3);
  margin-bottom: var(--space-6);
  max-width: 560px;
}

/* ------------------------------------------------
   SECTION HOOKS — tier 1 anchor copy
   ------------------------------------------------ */
.problem-hook,
.diff-hook {
  font-size: var(--text-body);
  color: var(--text-discovery-secondary);
  line-height: var(--leading-body);
  max-width: 680px;
  margin-bottom: var(--space-8);
}

.thesis-hook {
  font-size: var(--text-body);
  color: var(--text-enlighten-secondary);
  line-height: var(--leading-body);
  max-width: 680px;
  margin-bottom: var(--space-8);
}

/* Thesis structure: now follows hook, precedes tier2 trigger */
.thesis-structure {
  margin-bottom: var(--space-6);
}

/* ------------------------------------------------
   SECTION 6 — FOR TEAMS subhead
   ------------------------------------------------ */
.teams-subhead {
  font-size: var(--text-body);
  color: var(--text-enlighten-secondary);
  line-height: var(--leading-body);
  max-width: 600px;
  margin-bottom: var(--space-12);
}

/* ------------------------------------------------
   SECTION 8 — CTA transition line
   ------------------------------------------------ */
.cta-transition-line {
  font-size: var(--text-caption);
  color: var(--text-discovery-tertiary);
  line-height: var(--leading-body);
  margin-bottom: var(--space-8);
}

/* ------------------------------------------------
   TIER 2 INLINE EXPAND SYSTEM
   Applies to Sections 2, 3, 4 (per tab), 5, 6 (per card).
   Trigger text is Signal Violet on light; Signal Glow on dark.
   ------------------------------------------------ */
.tier2-trigger {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-sans);
  font-size: var(--text-caption);
  font-weight: var(--weight-medium);
  color: var(--color-signal);
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  margin-top: var(--space-4);
  transition: opacity var(--duration-fast) var(--ease-hover);
}

.tier2-trigger:hover { opacity: 0.72; }

.section-discovery .tier2-trigger { color: var(--color-signal-glow); }

.tier2-body {
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transition:
    max-height var(--duration-normal) var(--ease-standard),
    opacity    var(--duration-normal) var(--ease-standard);
}

.tier2-body.expanded {
  max-height: 2000px;
  opacity: 1;
}

/* ------------------------------------------------
   NAV V3 — DROPDOWN + DUAL CTAs
   ------------------------------------------------ */
.nav-item--dropdown { position: relative; }

.nav-dropdown-trigger {
  font-family: var(--font-sans);
  font-size: var(--text-caption);
  font-weight: var(--weight-medium);
  color: var(--text-discovery-secondary);
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  transition: color var(--duration-fast) var(--ease-hover);
}

.nav-dropdown-trigger:hover { color: var(--text-discovery-primary); }

.nav-dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + var(--space-3));
  left: 0;
  background: var(--surface-discovery-card);
  border: 1px solid var(--surface-discovery-border-emphasis);
  border-radius: var(--radius-md);
  padding: var(--space-2) 0;
  min-width: 210px;
  z-index: var(--z-overlay);
  box-shadow: 0 8px 24px rgba(0,0,0,0.35);
}

.nav-item--dropdown:hover .nav-dropdown-menu,
.nav-item--dropdown.open .nav-dropdown-menu { display: block; }

.nav-dropdown-menu a {
  display: block;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-caption);
  color: var(--text-discovery-secondary);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-hover), background var(--duration-fast) var(--ease-hover);
}

.nav-dropdown-menu a:hover {
  color: var(--text-discovery-primary);
  background: rgba(107,79,206,0.08);
}

.nav-ctas {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.nav-cta-ghost {
  font-family: var(--font-sans);
  font-size: var(--text-label);
  font-weight: var(--weight-medium);
  color: var(--text-discovery-secondary);
  text-decoration: none;
  border: 1px solid rgba(255,255,255,0.20);
  border-radius: var(--btn-radius);
  padding: var(--space-2) var(--space-4);
  white-space: nowrap;
  transition: color var(--duration-fast) var(--ease-hover), border-color var(--duration-fast) var(--ease-hover);
}

.nav-cta-ghost:hover {
  color: var(--text-discovery-primary);
  border-color: rgba(255,255,255,0.40);
}

/* Override: v3 nav CTA always visible */
.nav-cta { display: inline-block; }

/* ------------------------------------------------
   HERO V3 — DUAL CTAs + SUPPORTING LABEL
   ------------------------------------------------ */
.hero-cta-label {
  display: block;
  font-size: var(--text-label);
  color: var(--text-enlighten-tertiary);
  margin-top: var(--space-3);
  line-height: var(--leading-caption);
}

/* ------------------------------------------------
   SECTION 2 — PHILOSOPHY
   ------------------------------------------------ */
#philosophy { padding: 96px 0; }

.philosophy-headline {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.5vw, 40px);
  font-weight: var(--weight-bold);
  font-style: italic;
  line-height: var(--leading-h2);
  color: var(--text-discovery-primary);
  margin-bottom: var(--space-8);
  max-width: 720px;
}

.philosophy-tier1 {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  max-width: 680px;
  margin-bottom: var(--space-8);
}

.philosophy-tier1 p {
  font-size: var(--text-body);
  color: var(--text-discovery-secondary);
  line-height: var(--leading-body);
}

.philosophy-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

.philosophy-col-label {
  font-size: var(--text-label);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-overline);
  text-transform: uppercase;
  color: var(--text-discovery-tertiary);
  margin-bottom: var(--space-4);
}

.philosophy-sequence {
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--surface-discovery-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.philosophy-seq-item {
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-caption);
  color: var(--text-discovery-secondary);
  line-height: var(--leading-caption);
  border-bottom: 1px solid var(--surface-discovery-border);
}

.philosophy-seq-item:last-child { border-bottom: none; }

.philosophy-seq-item--muted { color: var(--text-discovery-tertiary); }

.philosophy-seq-item--primary {
  color: var(--color-teal-neon);
  background: rgba(0,229,204,0.06);
  font-weight: var(--weight-bold);
}

.philosophy-seq-arrow {
  padding: var(--space-1) var(--space-4);
  font-size: var(--text-label);
  color: var(--text-discovery-tertiary);
  text-align: center;
  border-bottom: 1px solid var(--surface-discovery-border);
}

/* ------------------------------------------------
   SECTION 4 — THE REPORTS
   ------------------------------------------------ */
#reports { padding: 96px 0; border-top: 1px solid var(--surface-enlighten-border); }

.reports-headline {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.5vw, 40px);
  font-weight: var(--weight-bold);
  font-style: italic;
  line-height: var(--leading-h2);
  color: var(--text-enlighten-primary);
  margin-bottom: var(--space-4);
  max-width: 680px;
}

.reports-intro {
  font-size: var(--text-body);
  color: var(--text-enlighten-secondary);
  line-height: var(--leading-body);
  max-width: 680px;
  margin-bottom: var(--space-12);
}

.reports-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  margin-bottom: var(--space-12);
}

.report-card {
  background: var(--surface-enlighten-card);
  border: 1px solid var(--surface-enlighten-border);
  border-top: 3px solid var(--color-signal);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.report-card-label {
  font-size: var(--text-label);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-overline);
  text-transform: uppercase;
  color: var(--color-signal);
}

.report-card-desc {
  font-size: var(--text-body);
  color: var(--text-enlighten-secondary);
  line-height: var(--leading-body);
}

.report-callout {
  border-left: 3px solid var(--color-signal);
  padding: var(--space-3) var(--space-4);
  margin-top: auto;
}

.report-callout p {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--text-caption);
  color: var(--color-signal);
  line-height: var(--leading-body);
}

.reports-cta {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-3);
}

.reports-cta-note {
  font-size: var(--text-label);
  color: var(--text-enlighten-tertiary);
  line-height: var(--leading-caption);
}

/* ------------------------------------------------
   SECTION 6 — ADVISORY
   ------------------------------------------------ */
#advisory { padding: 96px 0; border-top: 1px solid var(--surface-enlighten-border); }

.advisory-headline {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.5vw, 40px);
  font-weight: var(--weight-bold);
  font-style: italic;
  line-height: var(--leading-h2);
  color: var(--text-enlighten-primary);
  margin-bottom: var(--space-6);
  max-width: 680px;
}

.advisory-intro {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  max-width: 680px;
  margin-bottom: var(--space-12);
  padding-bottom: var(--space-8);
  border-bottom: 1px solid var(--surface-enlighten-border);
}

.advisory-intro p {
  font-size: var(--text-body);
  color: var(--text-enlighten-secondary);
  line-height: var(--leading-body);
}

.advisory-packages {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-bottom: var(--space-12);
}

.advisory-package {
  background: var(--surface-enlighten-card);
  border: 1px solid var(--surface-enlighten-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.advisory-package-number {
  font-family: var(--font-mono);
  font-size: var(--text-label);
  color: var(--color-teal-jewel);
  letter-spacing: var(--tracking-label);
}

.advisory-package-name {
  font-family: var(--font-sans);
  font-size: var(--text-h4);
  font-weight: var(--weight-bold);
  color: var(--text-enlighten-primary);
  line-height: var(--leading-h3);
}

.advisory-package-tagline {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--text-body);
  color: var(--color-signal);
  line-height: var(--leading-body);
}

.advisory-package-body {
  font-size: var(--text-caption);
  color: var(--text-enlighten-secondary);
  line-height: var(--leading-body);
  flex: 1;
}

.advisory-package-for {
  font-size: var(--text-label);
  color: var(--text-enlighten-tertiary);
  line-height: var(--leading-caption);
  border-top: 1px solid var(--surface-enlighten-border);
  padding-top: var(--space-3);
  margin-top: auto;
}

.advisory-package-for strong { color: var(--text-enlighten-secondary); }

.advisory-cta {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-3);
}

.advisory-cta-note {
  font-size: var(--text-label);
  color: var(--text-enlighten-tertiary);
  line-height: var(--leading-caption);
  max-width: 400px;
}

/* ------------------------------------------------
   SECTION 8 — FOUNDER
   ------------------------------------------------ */
#founder { padding: 96px 0; }

.founder-inner {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: var(--space-12);
  align-items: start;
}

.founder-photo-placeholder {
  width: 200px;
  height: 200px;
  border-radius: var(--radius-lg);
  background: var(--surface-discovery-card);
  border: 1px solid var(--surface-discovery-border-emphasis);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: var(--text-h2);
  font-weight: var(--weight-bold);
  color: var(--color-signal-glow);
}

.founder-photo {
  width: 200px;
  height: 200px;
  border-radius: var(--radius-lg);
  object-fit: cover;
  border: 1px solid var(--surface-discovery-border-emphasis);
}

.founder-headline {
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 36px);
  font-weight: var(--weight-bold);
  font-style: italic;
  line-height: var(--leading-h2);
  color: var(--text-discovery-primary);
  margin-bottom: var(--space-6);
  max-width: 620px;
}

.founder-body {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.founder-body p {
  font-size: var(--text-body);
  color: var(--text-discovery-secondary);
  line-height: var(--leading-body);
}

.founder-quote {
  border-left: 3px solid var(--color-magenta-neon);
  padding: var(--space-4) var(--space-6);
  margin-bottom: var(--space-6);
}

.founder-quote p {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--text-body-large);
  color: var(--text-discovery-primary);
  line-height: var(--leading-body-large);
  margin-bottom: var(--space-3);
}

.founder-quote cite {
  font-size: var(--text-caption);
  color: var(--text-discovery-tertiary);
  font-style: normal;
}

.founder-link {
  font-size: var(--text-body);
  font-weight: var(--weight-medium);
  color: var(--color-signal-glow);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: opacity var(--duration-fast) var(--ease-hover);
}

.founder-link:hover { opacity: 0.75; }

/* ------------------------------------------------
   SECTION 10 — CTA v3 DUAL-PATH
   ------------------------------------------------ */
.cta-paths {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: var(--space-8);
  align-items: start;
  margin-top: var(--space-8);
  width: 100%;
  max-width: 680px;
}

.cta-path {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  text-align: center;
}

.cta-path-note {
  font-size: var(--text-label);
  color: var(--text-discovery-tertiary);
  line-height: var(--leading-caption);
  max-width: 240px;
}

.cta-path-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-discovery-tertiary);
  font-size: var(--text-caption);
  padding-top: var(--space-4);
}

/* ------------------------------------------------
   FOOTER V3 — ADVISORY NAV GROUP
   ------------------------------------------------ */
.footer-nav-group { display: flex; flex-direction: column; gap: var(--space-6); }

/* ------------------------------------------------
   SECONDARY PAGE SHARED STYLES
   ------------------------------------------------ */
.page-hero {
  padding: 140px 0 64px;
}

.page-hero-label {
  font-size: var(--text-label);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-overline);
  text-transform: uppercase;
  color: var(--color-teal-jewel);
  margin-bottom: var(--space-4);
}

.page-hero-headline {
  font-family: var(--font-display);
  font-size: clamp(36px, 5vw, 60px);
  font-weight: var(--weight-bold);
  font-style: italic;
  line-height: var(--leading-h1);
  color: var(--text-enlighten-primary);
  max-width: 700px;
  margin-bottom: var(--space-6);
}

.page-hero-body {
  font-size: var(--text-body-large);
  color: var(--text-enlighten-secondary);
  line-height: var(--leading-body-large);
  max-width: 560px;
  margin-bottom: var(--space-8);
}

/* Career timeline — About page */
.career-section { padding: 64px 0; border-top: 1px solid var(--surface-enlighten-border); }

.career-headline {
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 36px);
  font-weight: var(--weight-bold);
  font-style: italic;
  color: var(--text-enlighten-primary);
  margin-bottom: var(--space-8);
  max-width: 560px;
}

.career-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 680px;
}

.career-item {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--space-8);
  padding: var(--space-6) 0;
  border-bottom: 1px solid var(--surface-enlighten-border);
}

.career-item:last-child { border-bottom: none; }

.career-item-co {
  font-size: var(--text-body);
  font-weight: var(--weight-bold);
  color: var(--text-enlighten-primary);
}

.career-item-co span {
  display: block;
  font-size: var(--text-caption);
  font-weight: var(--weight-regular);
  color: var(--text-enlighten-tertiary);
  margin-top: var(--space-1);
}

.career-item-role {
  font-size: var(--text-body);
  color: var(--text-enlighten-secondary);
  line-height: var(--leading-body);
}

/* Products detail page */
.product-detail { padding: 80px 0; border-top: 1px solid var(--surface-enlighten-border); }
.product-detail:first-of-type { border-top: none; }

.product-detail-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: start;
}

.product-detail-label {
  font-size: var(--text-label);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-overline);
  text-transform: uppercase;
  color: var(--color-teal-jewel);
  margin-bottom: var(--space-3);
}

.product-detail-headline {
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 36px);
  font-weight: var(--weight-bold);
  font-style: italic;
  line-height: var(--leading-h2);
  color: var(--text-enlighten-primary);
  margin-bottom: var(--space-4);
}

.product-detail-body {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.product-detail-body p {
  font-size: var(--text-body);
  color: var(--text-enlighten-secondary);
  line-height: var(--leading-body);
}

.product-detail-panel {
  background: var(--surface-enlighten-card);
  border: 1px solid var(--surface-enlighten-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.product-detail-panel-label {
  font-size: var(--text-label);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-overline);
  text-transform: uppercase;
  color: var(--text-enlighten-tertiary);
}

.product-detail-panel-row {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--surface-enlighten-border);
}

.product-detail-panel-row:last-child { border-bottom: none; }

.product-detail-panel-dot {
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--color-signal);
  flex-shrink: 0;
  margin-top: 6px;
}

.product-detail-panel-text {
  font-size: var(--text-caption);
  color: var(--text-enlighten-secondary);
  line-height: var(--leading-caption);
}

/* ------------------------------------------------
   RESPONSIVE
   ------------------------------------------------ */
@media (max-width: 900px) {
  .thesis-structure {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .thesis-arrow { transform: rotate(90deg); }

  .teams-grid { grid-template-columns: 1fr; }

  .trust-principles { grid-template-columns: 1fr; }

  .how-pane.active { grid-template-columns: 1fr; }

  .footer-top { grid-template-columns: 1fr; gap: var(--space-8); }

  .footer-bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 640px) {
  .section-inner,
  .section-inner--narrow { padding: 0 var(--space-4); }

  .site-nav-inner { padding: 0 var(--space-4); }

  .nav-links { display: none; }

  #hero { padding: 100px 0 64px; }

  .hero-actions { flex-direction: column; align-items: flex-start; }

  .diff-table { display: none; } /* swap for mobile cards if needed post-QA */
}

/* ================================================
   V4 ADDITIONS — M.O.-standalone model
   ================================================ */

/* ------------------------------------------------
   HERO — DARK SURFACE OVERRIDES
   Hero moves from section-enlighten to section-discovery in v4.
   ------------------------------------------------ */
.section-discovery #hero .hero-headline {
  color: var(--text-discovery-primary);
}

.section-discovery .hero-sub-statement {
  color: var(--color-signal-glow);
}

.section-discovery .hero-subhead {
  color: var(--text-discovery-secondary);
}

.hero-supporting-label {
  display: block;
  font-size: var(--text-label);
  color: var(--text-discovery-tertiary);
  margin-top: var(--space-3);
  line-height: var(--leading-caption);
}

/* ------------------------------------------------
   SECTION 3 — HOW M.O. WORKS (steps layout)
   Replaces tabbed product suite in v4.
   ------------------------------------------------ */
.how-steps {
  display: flex;
  flex-direction: column;
  margin-bottom: var(--space-10);
}

.how-step {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: var(--space-6);
  align-items: start;
  border-top: 1px solid var(--surface-enlighten-border);
  padding: var(--space-8) 0;
}

.how-step-number {
  font-family: var(--font-mono);
  font-size: var(--text-body-large);
  font-weight: var(--weight-bold);
  color: var(--color-teal-jewel);
  padding-top: 4px;
}

.how-step-headline {
  font-family: var(--font-sans);
  font-size: var(--text-body-large);
  font-weight: var(--weight-bold);
  color: var(--text-enlighten-primary);
  margin-bottom: var(--space-3);
  line-height: var(--leading-h3);
}

.how-step-body {
  font-size: var(--text-body);
  color: var(--text-enlighten-secondary);
  line-height: var(--leading-body);
}

/* ------------------------------------------------
   SECTION 4 — WHAT IT UNLOCKS
   Replaces Reports section in v4.
   ------------------------------------------------ */
#unlocks {
  padding: 96px 0;
  border-top: 1px solid var(--surface-enlighten-border);
}

.unlocks-headline {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.5vw, 40px);
  font-weight: var(--weight-bold);
  font-style: italic;
  line-height: var(--leading-h2);
  color: var(--text-enlighten-primary);
  margin-bottom: var(--space-4);
  max-width: 680px;
}

.unlocks-lead {
  font-size: var(--text-body);
  color: var(--text-enlighten-secondary);
  line-height: var(--leading-body);
  max-width: 680px;
  margin-bottom: var(--space-12);
}

.unlocks-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.unlock-item {
  background: var(--surface-enlighten-card);
  border: 1px solid var(--surface-enlighten-border);
  border-top: 3px solid var(--color-teal-jewel);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.unlock-headline {
  font-family: var(--font-sans);
  font-size: var(--text-body);
  font-weight: var(--weight-bold);
  color: var(--text-enlighten-primary);
  line-height: var(--leading-h3);
}

.unlock-body {
  font-size: var(--text-caption);
  color: var(--text-enlighten-secondary);
  line-height: var(--leading-body);
}

.unlocks-second-order {
  font-size: var(--text-body);
  color: var(--text-enlighten-tertiary);
  line-height: var(--leading-body);
  max-width: 680px;
  font-style: italic;
}

/* ------------------------------------------------
   SECTION 9 — CTA v4 SINGLE PATH
   ------------------------------------------------ */
.cta-supporting-text {
  font-size: var(--text-label);
  color: var(--text-discovery-tertiary);
  line-height: var(--leading-caption);
  margin-top: var(--space-3);
}

/* ------------------------------------------------
   RESPONSIVE — V4 ADDITIONS
   ------------------------------------------------ */
@media (max-width: 900px) {
  .unlocks-grid { grid-template-columns: 1fr; }

  .how-step { grid-template-columns: 40px 1fr; }
}

@media (max-width: 640px) {
  .unlocks-grid { grid-template-columns: 1fr; }
}