:root {
  --bg: #0a0a0c;
  --bg-elevated: #111114;
  --bg-card: #16161a;
  --fg: #e8e6e3;
  --fg-muted: #8a8a8e;
  --accent: #ff6b35;
  --accent-glow: rgba(255, 107, 53, 0.15);
  --accent-secondary: #ffd166;
  --border: rgba(255, 255, 255, 0.06);
  --radius: 12px;
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'DM Sans', sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.6;
  overflow-x: hidden;
}

.accent {
  color: var(--accent);
}

.section-tag {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  padding: 6px 14px;
  background: var(--accent-glow);
  border-radius: 100px;
  margin-bottom: 1.5rem;
}

/* === HERO === */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 6rem 2rem 4rem;
  position: relative;
  background: 
    radial-gradient(ellipse 80% 50% at 70% 20%, rgba(255, 107, 53, 0.08), transparent),
    radial-gradient(ellipse 60% 40% at 20% 80%, rgba(255, 209, 102, 0.04), transparent),
    var(--bg);
}

.hero-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-label {
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.03em;
  color: var(--fg);
  opacity: 0.06;
  writing-mode: vertical-lr;
  text-orientation: mixed;
  transform: rotate(180deg);
  user-select: none;
}

.hero-content h1 {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

.lede {
  font-size: 1.15rem;
  color: var(--fg-muted);
  max-width: 560px;
  line-height: 1.7;
  margin-bottom: 3rem;
}

.hero-stats {
  display: flex;
  gap: 3rem;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.stat-number {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.hero-scroll-line {
  width: 1px;
  height: 80px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  margin: 4rem auto 0;
}

/* === LAYERS === */
.layers {
  padding: 8rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.section-header {
  margin-bottom: 4rem;
}

.section-header h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.layers-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.layer-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.5rem;
  position: relative;
  transition: border-color 0.3s ease, transform 0.3s ease;
}

.layer-card:hover {
  border-color: rgba(255, 107, 53, 0.2);
  transform: translateY(-2px);
}

.layer-number {
  font-family: var(--font-display);
  font-size: 4rem;
  font-weight: 700;
  color: var(--accent);
  opacity: 0.12;
  position: absolute;
  top: 1.5rem;
  right: 2rem;
  line-height: 1;
}

.layer-card h3 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.layer-card p {
  color: var(--fg-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.layer-range {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-secondary);
  padding: 6px 12px;
  background: rgba(255, 209, 102, 0.08);
  border-radius: 6px;
  display: inline-block;
}

/* === NUMBERS === */
.numbers {
  padding: 8rem 2rem;
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.numbers-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.numbers-left h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.timeline-item {
  padding: 2rem 0;
  border-bottom: 1px solid var(--border);
}

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

.timeline-month {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--fg-muted);
  margin-bottom: 0.5rem;
}

.timeline-range {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.timeline-desc {
  color: var(--fg-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

.numbers-callout {
  max-width: 1200px;
  margin: 4rem auto 0;
  text-align: center;
}

.numbers-callout p {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--fg-muted);
}

.numbers-callout strong {
  color: var(--fg);
}

/* === CLOSING === */
.closing {
  padding: 8rem 2rem;
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.closing h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 2rem;
}

.closing p {
  color: var(--fg-muted);
  font-size: 1.1rem;
  line-height: 1.8;
  max-width: 680px;
  margin: 0 auto 3rem;
}

.closing-pillars {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--fg-muted);
}

.dot {
  width: 4px;
  height: 4px;
  background: var(--accent);
  border-radius: 50%;
  display: inline-block;
}

/* === FOOTER === */
.site-footer {
  padding: 4rem 2rem;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}

.footer-tagline {
  color: var(--fg-muted);
  font-size: 0.85rem;
}

/* === NAV === */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10,10,12,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-brand {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-decoration: none;
  color: var(--fg);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}
.nav-link {
  color: var(--fg-muted);
  text-decoration: none;
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}
.nav-link:hover { color: var(--fg); }
.nav-cta {
  background: var(--accent);
  color: #fff;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 9px 20px;
  border-radius: 8px;
  text-decoration: none;
  transition: opacity 0.2s;
}
.nav-cta:hover { opacity: 0.85; }
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--fg);
  font-size: 1.3rem;
  cursor: pointer;
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
  .hero {
    padding: 4rem 1.5rem 3rem;
  }
  
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 0;
  }
  
  .hero-label {
    writing-mode: horizontal-tb;
    transform: none;
    font-size: 2.5rem;
    opacity: 0.04;
    margin-bottom: 1rem;
  }
  
  .hero-stats {
    flex-direction: column;
    gap: 1.5rem;
  }
  
  .layers {
    padding: 4rem 1.5rem;
  }
  
  .layers-grid {
    grid-template-columns: 1fr;
  }
  
  .numbers {
    padding: 4rem 1.5rem;
  }
  
  .numbers-inner {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .closing {
    padding: 4rem 1.5rem;
  }
  
  .closing-pillars {
    gap: 0.75rem;
  }
}