/* =======================
   TOKENS & RESET
   ======================= */
:root {
  --bg: #FAF8F5;
  --fg: #1a1814;
  --accent: #4A7C59;
  --accent-light: #6A9C79;
  --accent-dim: #E8EFE9;
  --stone: #C4A882;
  --stone-light: #E8DFD0;
  --muted: #8A8377;
  --divider: #E5E1DA;

  --font-display: 'Fraunces', Georgia, serif;
  --font-body: 'Figtree', system-ui, sans-serif;

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 8rem;

  --max-w: 1100px;
  --radius: 6px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
}

/* =======================
   NAV
   ======================= */
.nav {
  padding: 1.5rem 2rem;
  border-bottom: 1px solid var(--divider);
}
.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: baseline;
  gap: 1.5rem;
}
.nav-logo {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--fg);
  letter-spacing: -0.02em;
}
.nav-tagline {
  font-size: 0.875rem;
  color: var(--muted);
}
.nav-links {
  margin-left: auto;
}
.nav-dash-link {
  font-size: 0.875rem;
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
  transition: opacity 0.15s;
}
.nav-dash-link:hover { opacity: 0.7; }

/* =======================
   HERO
   ======================= */
.hero {
  padding: 5rem 2rem 5rem;
  border-bottom: 1px solid var(--divider);
}
.hero-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}
.hero-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 1.5rem;
}
.hero-headline {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--fg);
  margin-bottom: 1.5rem;
}
.hero-sub {
  font-size: 1.1rem;
  color: var(--muted);
  line-height: 1.65;
  max-width: 44ch;
}

/* Linguistic diagram */
.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}
.linguistic-diagram {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  padding: 2.5rem 2rem;
  background: var(--accent-dim);
  border-radius: var(--radius);
  border: 1px solid var(--stone-light);
  width: 100%;
}
.diagram-layer {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
}
.node {
  background: var(--bg);
  border: 1.5px solid var(--accent);
  border-radius: 4px;
  padding: 0.4rem 0.85rem;
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-style: italic;
  color: var(--accent);
  letter-spacing: 0.02em;
}
.layer-top .node {
  font-size: 0.95rem;
  font-style: normal;
  font-weight: 600;
  color: var(--fg);
  border-color: var(--fg);
  background: var(--fg);
  color: var(--bg);
}
.diagram-label {
  margin-top: 1rem;
  font-size: 0.7rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* =======================
   WHAT
   ======================= */
.what {
  padding: 5rem 2rem;
  border-bottom: 1px solid var(--divider);
}
.what-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: 0;
  align-items: start;
}
.what-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 0 2rem;
}
.stat-number {
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 300;
  color: var(--fg);
  line-height: 1;
  margin-bottom: 0.5rem;
}
.stat-label {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.4;
  max-width: 20ch;
}
.what-divider {
  width: 1px;
  height: 80px;
  background: var(--divider);
  margin-top: 1.5rem;
}
.what-conclusion {
  max-width: var(--max-w);
  margin: 3rem auto 0;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--fg);
  text-align: center;
  font-style: italic;
}

/* =======================
   FEATURES
   ======================= */
.features {
  padding: 5rem 2rem;
  border-bottom: 1px solid var(--divider);
  background: var(--fg);
  color: var(--bg);
}
.features-heading {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 400;
  text-align: center;
  margin-bottom: 4rem;
  letter-spacing: -0.02em;
}
.features-grid {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
}
.feature-card {
  background: var(--fg);
  border: 1px solid rgba(255,255,255,0.08);
  padding: 2.5rem;
}
.feature-card h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 400;
  margin: 1rem 0 0.75rem;
  letter-spacing: -0.01em;
}
.feature-card p {
  font-size: 0.9rem;
  color: rgba(250,248,245,0.6);
  line-height: 1.65;
}
.feature-icon {
  margin-bottom: 0;
}

/* =======================
   PRINCIPLES
   ======================= */
.principles {
  padding: 5rem 2rem;
  border-bottom: 1px solid var(--divider);
}
.principles-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}
.principles-heading {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.75rem);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.15;
}
.principles-body p {
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.7;
  margin-bottom: 1.25rem;
}
.principles-body p:last-child {
  margin-bottom: 0;
}

/* =======================
   OUTCOMES
   ======================= */
.outcomes {
  padding: 5rem 2rem;
  border-bottom: 1px solid var(--divider);
  background: var(--accent-dim);
}
.outcomes-heading {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 400;
  text-align: center;
  margin-bottom: 3rem;
  letter-spacing: -0.02em;
  color: var(--fg);
}
.outcomes-grid {
  max-width: 640px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.outcome-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 1rem;
  color: var(--fg);
}
.outcome-icon {
  flex-shrink: 0;
}

/* =======================
   CLOSING
   ======================= */
.closing {
  padding: 6rem 2rem;
  text-align: center;
}
.closing-headline {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 400;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 1.5rem;
}
.closing-sub {
  font-size: 1.1rem;
  color: var(--muted);
  max-width: 44ch;
  margin: 0 auto;
  line-height: 1.65;
}

/* =======================
   FOOTER
   ======================= */
.footer {
  padding: 3rem 2rem;
  border-top: 1px solid var(--divider);
}
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.footer-logo {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}
.footer-desc {
  font-size: 0.8rem;
  color: var(--muted);
}
.footer-links {
  font-size: 0.8rem;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.footer-sep { color: var(--stone-light); }

/* =======================
   RESPONSIVE
   ======================= */
@media (max-width: 768px) {
  .hero-inner { grid-template-columns: 1fr; gap: 3rem; }
  .hero-visual { order: -1; }
  .what-inner { grid-template-columns: 1fr; gap: 2rem; text-align: center; }
  .what-divider { width: 60px; height: 1px; margin: 0 auto; }
  .what-stat { padding: 0 1rem; }
  .features-grid { grid-template-columns: 1fr; }
  .principles-inner { grid-template-columns: 1fr; gap: 2rem; }
  .footer-inner { flex-direction: column; gap: 1rem; text-align: center; }
  .closing { padding: 4rem 2rem; }
  .linguistic-diagram { padding: 1.5rem 1rem; }
}
@media (max-width: 480px) {
  .hero { padding: 3rem 1.5rem 3rem; }
  .stat-number { font-size: 2.5rem; }
  .features { padding: 3rem 1.5rem; }
  .feature-card { padding: 1.75rem; }
}