/* ============================================================
   DUOCLARITY — "Precision & Light"
   Premium AI Advisory · Clean, Confident, Unmistakable
   ============================================================ */

:root {
  /* Backgrounds */
  --bg: #FDFCFA;
  --bg-warm: #F6F3EE;
  --bg-cream: #EDE8E0;
  --bg-dark: #0C1018;
  --bg-dark-surface: #161A24;

  /* Text */
  --ink: #0C1018;
  --ink-secondary: #3D3D3D;
  --ink-tertiary: #6B6B6B;
  --ink-on-dark: #F0ECE4;
  --ink-secondary-on-dark: #B5AFA5;

  /* Accent */
  --copper: #B07A4B;
  --copper-light: #C9935E;
  --copper-bg: rgba(176, 122, 75, 0.07);

  /* Borders */
  --border: rgba(12, 16, 24, 0.08);
  --border-medium: rgba(12, 16, 24, 0.12);
  --border-on-dark: rgba(240, 236, 228, 0.1);

  /* Fonts */
  --font-display: 'Instrument Serif', Georgia, serif;
  --font-heading: 'Syne', system-ui, sans-serif;
  --font-body: 'Inter', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Spacing */
  --nav-h: 72px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* --- RESET --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 2rem); -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
body { font-family: var(--font-body); font-weight: 400; line-height: 1.6; color: var(--ink); background: var(--bg); overflow-x: hidden; }
::selection { background: var(--copper); color: white; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

/* --- SKIP LINK --- */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  padding: 0.75rem 1.5rem;
  background: var(--ink);
  color: white;
  font-weight: 600;
  z-index: 200;
  transition: top 0.2s;
}
.skip-link:focus { top: 0.5rem; }

/* --- TYPOGRAPHY --- */
h1, h2, h3, h4 { font-family: var(--font-heading); font-weight: 700; line-height: 1.08; color: var(--ink); }
h1 { font-size: clamp(3.25rem, 6.5vw, 6rem); letter-spacing: -0.03em; }
h2 { font-size: clamp(2rem, 3.5vw, 3.5rem); letter-spacing: -0.02em; }
h3 { font-size: clamp(1.25rem, 1.8vw, 1.5rem); letter-spacing: -0.01em; }

.display-italic {
  font-family: var(--font-display);
  font-weight: 400;
  font-style: italic;
}

.label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--copper);
}

.label-dark { color: var(--copper-light); }

/* --- LAYOUT --- */
.container { max-width: 1280px; margin: 0 auto; padding: 0 clamp(1.5rem, 4vw, 3rem); }
.container-narrow { max-width: 800px; margin: 0 auto; padding: 0 clamp(1.5rem, 4vw, 3rem); }

/* --- COPPER LINE --- */
.copper-line {
  display: block;
  width: 32px;
  height: 2px;
  background: var(--copper);
  margin-bottom: 1.25rem;
}

/* ============================================================
   NAVIGATION
   ============================================================ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(253, 252, 250, 0.85);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  border-bottom: 1px solid var(--border);
  transition: box-shadow 0.3s ease;
}
.nav.is-scrolled { box-shadow: 0 1px 24px rgba(0,0,0,0.06); }

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 clamp(1.5rem, 4vw, 3rem);
}

.nav-logo { display: inline-flex; align-items: center; gap: 0.75rem; }

.nav-wordmark {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.nav-links { display: flex; align-items: center; gap: 2.5rem; }

.nav-links a {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--ink-tertiary);
  letter-spacing: 0.01em;
  position: relative;
  transition: color 0.25s ease;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 1.5px;
  background: var(--copper);
  transition: width 0.35s var(--ease);
}

.nav-links a:hover { color: var(--ink); }
.nav-links a:hover::after,
.nav-links a.current::after { width: 100%; }
.nav-links a.current { color: var(--ink); }

.nav-cta {
  padding: 0.5rem 1.5rem;
  background: var(--ink);
  color: white !important;
  font-weight: 600;
  font-size: 0.8125rem;
  border-radius: 0;
  transition: transform 0.2s var(--ease-spring), opacity 0.2s ease;
}
.nav-cta:hover { transform: translateY(-1px); opacity: 0.9; }
.nav-cta::after { display: none !important; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.nav-toggle span { display: block; width: 24px; height: 1.5px; background: var(--ink); }

/* ============================================================
   BUTTONS
   ============================================================ */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2.25rem;
  background: var(--ink);
  color: white;
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  border: none;
  border-radius: 0;
  cursor: pointer;
  transition: transform 0.25s var(--ease-spring), box-shadow 0.3s ease;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(12, 16, 24, 0.15);
}

.btn-primary-light {
  background: white;
  color: var(--ink);
}
.btn-primary-light:hover {
  box-shadow: 0 8px 24px rgba(255,255,255,0.2);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2.25rem;
  background: transparent;
  color: var(--ink-secondary);
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  border: 1px solid var(--border-medium);
  border-radius: 0;
  cursor: pointer;
  transition: color 0.25s ease, border-color 0.25s ease, transform 0.25s var(--ease-spring);
}
.btn-secondary:hover {
  color: var(--ink);
  border-color: var(--copper);
  transform: translateY(-1px);
}

.btn-secondary-light {
  color: rgba(255,255,255,0.7);
  border-color: rgba(255,255,255,0.2);
}
.btn-secondary-light:hover {
  color: white;
  border-color: var(--copper-light);
}

.btn-arrow {
  display: inline-block;
  transition: transform 0.3s var(--ease);
}
.btn-primary:hover .btn-arrow,
.btn-secondary:hover .btn-arrow { transform: translateX(4px); }

/* Global focus-visible */
*:focus-visible {
  outline: 2px solid var(--copper);
  outline-offset: 4px;
}

/* ============================================================
   HERO — Light, Expansive, Confident
   ============================================================ */
.hero {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-h);
  position: relative;
  overflow: hidden;
  background: var(--bg);
}

/* Subtle warm gradient */
.hero-glow {
  position: absolute;
  top: -20%;
  right: -10%;
  width: 70%;
  height: 120%;
  background: radial-gradient(ellipse at center, var(--copper-bg), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 1280px;
  margin: 0 auto;
  padding: 6rem clamp(1.5rem, 4vw, 3rem);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-text { max-width: 600px; }

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.hero-eyebrow-line {
  width: 24px;
  height: 1.5px;
  background: var(--copper);
}

.hero h1 { margin-bottom: 1.75rem; }

.hero-sub {
  font-size: clamp(1.0625rem, 1.3vw, 1.1875rem);
  line-height: 1.7;
  color: var(--ink-secondary);
  max-width: 46ch;
  margin-bottom: 2.5rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.hero-signal {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.06em;
  color: var(--ink-tertiary);
}

/* Hero visual — architectural accent */
.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-graphic {
  width: 100%;
  aspect-ratio: 1;
  max-width: 480px;
  position: relative;
}

.hero-graphic-ring {
  position: absolute;
  inset: 10%;
  border: 1px solid var(--border);
  border-radius: 50%;
  animation: ring-rotate 60s linear infinite;
}

.hero-graphic-ring::before {
  content: '';
  position: absolute;
  top: -4px; left: 50%;
  width: 8px; height: 8px;
  background: var(--copper);
  margin-left: -4px;
}

.hero-graphic-ring-inner {
  position: absolute;
  inset: 25%;
  border: 1px solid var(--border-medium);
  border-radius: 50%;
  animation: ring-rotate 40s linear infinite reverse;
}

.hero-graphic-ring-inner::before {
  content: '';
  position: absolute;
  bottom: -3px; left: 50%;
  width: 6px; height: 6px;
  background: var(--copper);
  margin-left: -3px;
}

.hero-graphic-center {
  position: absolute;
  inset: 38%;
  background: var(--bg-warm);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

.hero-graphic-logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--ink);
  letter-spacing: 0.04em;
}

@keyframes ring-rotate { to { transform: rotate(360deg); } }

/* ============================================================
   CREDIBILITY — Warm cream band
   ============================================================ */
.credibility {
  padding: 3.5rem 0;
  background: var(--bg-warm);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.credibility-inner {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 3rem;
}

.cred-item { text-align: center; position: relative; }

.cred-item + .cred-item::before {
  content: '';
  position: absolute;
  left: -1.5rem; top: 50%;
  transform: translateY(-50%);
  width: 3px; height: 3px;
  background: var(--copper);
}

.cred-value {
  font-family: var(--font-heading);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink);
}

.cred-label {
  font-size: 0.75rem;
  color: var(--ink-tertiary);
  margin-top: 0.25rem;
}

/* ============================================================
   CONVICTION — Two column, editorial
   ============================================================ */
.conviction {
  padding: clamp(6rem, 10vw, 10rem) 0;
}

.conviction-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(3rem, 6vw, 8rem);
  align-items: start;
}

.conviction h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-style: italic;
  font-size: clamp(2rem, 3.5vw, 3.25rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.conviction-body {
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--ink-secondary);
}

.conviction-body strong {
  color: var(--ink);
  font-weight: 600;
}

/* ============================================================
   METHODOLOGY — Cards on cream
   ============================================================ */
.methodology {
  padding: clamp(6rem, 10vw, 10rem) 0;
  background: var(--bg-warm);
}

.methodology-header { margin-bottom: clamp(3rem, 5vw, 5rem); }

.methodology-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.method-card {
  background: var(--bg);
  padding: clamp(2rem, 3vw, 2.75rem);
  border: 1px solid var(--border);
  position: relative;
  transition: transform 0.35s var(--ease), box-shadow 0.35s ease;
}

.method-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 0; height: 2px;
  background: var(--copper);
  transition: width 0.5s var(--ease);
}

.method-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.06);
}

.method-card:hover::before { width: 100%; }
.method-card:focus-within::before { width: 100%; }

.method-num {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.1em;
  color: var(--ink-tertiary);
  margin-bottom: 1.75rem;
}

.method-card h3 { margin-bottom: 1rem; }

.method-body {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--ink-secondary);
}

/* ============================================================
   LEADERSHIP
   ============================================================ */
.leadership {
  padding: clamp(6rem, 10vw, 10rem) 0;
}

.leadership-inner {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: clamp(3rem, 6vw, 6rem);
  align-items: center;
}

.founder-portrait {
  aspect-ratio: 3 / 4;
  background: var(--bg-warm);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.founder-portrait::before {
  content: '';
  position: absolute;
  top: -8px; left: -8px;
  width: 40px; height: 40px;
  border-top: 2px solid var(--copper);
  border-left: 2px solid var(--copper);
}

.founder-portrait::after {
  content: '';
  position: absolute;
  bottom: -8px; right: -8px;
  width: 40px; height: 40px;
  border-bottom: 2px solid var(--copper);
  border-right: 2px solid var(--copper);
}

.founder-monogram {
  font-family: var(--font-display);
  font-size: 5rem;
  font-style: italic;
  color: var(--ink);
  opacity: 0.08;
}

.leadership-text .label { margin-bottom: 0.75rem; }
.leadership-text h2 { margin-bottom: 1.5rem; }

.leadership-lead {
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--ink-secondary);
  margin-bottom: 1.25rem;
}

.leadership-detail {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--ink-secondary);
  margin-bottom: 2rem;
}

.cred-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 2.5rem; }

.cred-tag {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.04em;
  color: var(--ink-secondary);
  padding: 0.5rem 1rem;
  border: 1px solid var(--border);
  background: var(--bg-warm);
  transition: border-color 0.3s ease;
}

.cred-tag:hover { border-color: var(--copper); }

/* ============================================================
   SERVICES — Dark section for contrast
   ============================================================ */
.services {
  padding: clamp(6rem, 10vw, 10rem) 0;
  background: var(--bg-dark);
  color: var(--ink-on-dark);
}

.services h2, .services h3 { color: var(--ink-on-dark); }

.services-header { margin-bottom: clamp(3rem, 5vw, 4rem); }

.services-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.service-card {
  background: var(--bg-dark-surface);
  padding: clamp(2.5rem, 4vw, 3.5rem);
  border: 1px solid var(--border-on-dark);
  transition: transform 0.35s var(--ease), border-color 0.35s ease;
}

.service-card:hover {
  transform: translateY(-3px);
  border-color: rgba(196, 147, 94, 0.3);
}

.service-card:focus-within { border-color: var(--copper-light); }

.service-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.5625rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--copper-light);
  padding: 0.375rem 0.75rem;
  border: 1px solid rgba(201, 147, 94, 0.2);
  margin-bottom: 2rem;
}

.service-body {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--ink-secondary-on-dark);
  margin-bottom: 2.5rem;
}

/* ============================================================
   CTA — Warm, inviting
   ============================================================ */
.cta-section {
  padding: clamp(7rem, 12vw, 12rem) 0;
  text-align: center;
  background: var(--bg-warm);
  position: relative;
}

.cta-section .copper-line { margin-inline: auto; }

.cta-headline {
  font-family: var(--font-display);
  font-weight: 400;
  font-style: italic;
  font-size: clamp(2rem, 3.5vw, 3.25rem);
  line-height: 1.15;
  max-width: 18ch;
  margin: 0 auto 1.5rem;
}

.cta-sub {
  max-width: 45ch;
  margin: 0 auto;
  color: var(--ink-secondary);
  font-size: 1rem;
  line-height: 1.7;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  border-top: 1px solid var(--border);
  padding: clamp(3rem, 5vw, 5rem) 0 0;
  background: var(--bg);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4rem;
  padding-bottom: clamp(2rem, 4vw, 4rem);
}

.footer-tagline {
  font-size: 0.8125rem;
  color: var(--ink-tertiary);
  line-height: 1.5;
  margin-top: 0.75rem;
}

.footer-social { display: flex; gap: 1rem; margin-top: 1.5rem; }

.footer-social a {
  color: var(--ink-tertiary);
  transition: color 0.25s ease, transform 0.25s var(--ease-spring);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
}
.footer-social a:hover { color: var(--ink); transform: translateY(-2px); }

.footer-nav { display: flex; gap: 4rem; }

.footer-nav-heading {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-tertiary);
  margin-bottom: 1.25rem;
}

.footer-nav ul { display: flex; flex-direction: column; gap: 0.75rem; }

.footer-nav a {
  font-size: 0.8125rem;
  color: var(--ink-secondary);
  transition: color 0.2s ease;
}
.footer-nav a:hover { color: var(--ink); }

.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 1.5rem 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-copy, .footer-location {
  font-size: 0.6875rem;
  color: var(--ink-tertiary);
  letter-spacing: 0.03em;
}

/* ============================================================
   SCROLL REVEAL
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

.reveal.is-visible { opacity: 1; transform: translateY(0); }
.reveal-d1 { transition-delay: 80ms; }
.reveal-d2 { transition-delay: 160ms; }
.reveal-d3 { transition-delay: 240ms; }
.reveal-d4 { transition-delay: 320ms; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .hero-content { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .conviction-inner { grid-template-columns: 1fr; gap: 2.5rem; }
  .leadership-inner { grid-template-columns: 1fr; gap: 3rem; }
  .founder-portrait { max-width: 360px; }
  .methodology-grid { grid-template-columns: 1fr; }
  .services-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-links.is-open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0; bottom: 0;
    background: var(--bg);
    padding: 3rem 2rem;
    gap: 1.5rem;
    z-index: 99;
    border-top: 1px solid var(--border);
  }
  .nav-links.is-open a { font-size: 1.25rem; color: var(--ink); }
  .nav-toggle { display: flex; }

  .credibility-inner { gap: 2rem; }
  .cred-item + .cred-item::before { display: none; }
  .footer-nav { flex-direction: column; gap: 2rem; }
  .footer-bottom { flex-direction: column; gap: 0.5rem; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
  .btn-primary:hover, .btn-secondary:hover, .method-card:hover, .service-card:hover { transform: none; }
  .hero-graphic-ring, .hero-graphic-ring-inner { animation: none; }
}