/* ===== FONTS ===== */
@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,300..900;1,9..144,300..700&family=DM+Sans:ital,opsz,wght@0,9..40,300..700;1,9..40,300..700&family=Space+Mono:wght@400;700&display=swap');

/* ===== TOKENS ===== */
:root {
  --bg: #0d0f14;
  --bg-2: #111318;
  --bg-3: #161820;
  --fg: #e8e4dc;
  --fg-2: #9a9590;
  --fg-3: #5c5955;
  --accent: #f59e0b;
  --accent-dim: rgba(245, 158, 11, 0.15);
  --accent-glow: rgba(245, 158, 11, 0.08);
  --border: rgba(232, 228, 220, 0.07);
  --border-accent: rgba(245, 158, 11, 0.25);
  --radius: 3px;
}

/* ===== RESET ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: 'DM Sans', system-ui, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ===== NAV ===== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 20px 48px;
  background: rgba(13, 15, 20, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: baseline;
  gap: 16px;
}
.nav-logo {
  font-family: 'Fraunces', serif;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--fg);
  letter-spacing: -0.02em;
}
.nav-tagline {
  font-family: 'Space Mono', monospace;
  font-size: 0.7rem;
  color: var(--fg-3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.nav-cta {
  margin-left: auto;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: opacity 0.2s;
}

.nav-cta:hover {
  opacity: 0.75;
}

/* ===== HERO ===== */
.hero {
  min-height: 100vh;
  padding: 140px 48px 80px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
}
.hero-eyebrow {
  font-family: 'Space Mono', monospace;
  font-size: 0.7rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 32px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.eyebrow-bar {
  display: inline-block;
  width: 32px;
  height: 1px;
  background: var(--accent);
}
.hero-headline {
  font-family: 'Fraunces', serif;
  font-size: clamp(3rem, 6vw, 5.5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--fg);
  margin-bottom: 32px;
}
.hero-headline em {
  font-style: italic;
  color: var(--accent);
}
.hero-lede {
  font-size: 1.1rem;
  color: var(--fg-2);
  line-height: 1.7;
  max-width: 480px;
}
.hero-visual {
  position: relative;
}
/* Matrix grid */
.matrix-container {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 20px;
  overflow: hidden;
}
.matrix-header-row {
  display: grid;
  grid-template-columns: 64px repeat(5, 1fr);
  gap: 4px;
  margin-bottom: 4px;
}
.matrix-corner { width: 64px; }
.matrix-col-label {
  font-family: 'Space Mono', monospace;
  font-size: 0.55rem;
  color: var(--fg-3);
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 4px 0;
}
.matrix-row {
  display: grid;
  grid-template-columns: 64px repeat(5, 1fr);
  gap: 4px;
  margin-bottom: 4px;
}
.matrix-row-label {
  font-family: 'Space Mono', monospace;
  font-size: 0.55rem;
  color: var(--fg-3);
  display: flex;
  align-items: center;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.matrix-cell {
  height: 28px;
  background: var(--bg-3);
  border-radius: 2px;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.matrix-cell--lit {
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid var(--border-accent);
  box-shadow: 0 0 12px rgba(245, 158, 11, 0.2);
}
.cell-number {
  font-family: 'Space Mono', monospace;
  font-size: 0.6rem;
  color: var(--accent);
  z-index: 1;
  position: relative;
}
.cell-glow {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, rgba(245,158,11,0.3) 0%, transparent 70%);
}
.matrix-caption {
  font-family: 'Space Mono', monospace;
  font-size: 0.6rem;
  color: var(--fg-3);
  text-align: center;
  margin-top: 12px;
  letter-spacing: 0.05em;
}
.hero-scroll-hint {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
}
.scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  margin: 0 auto;
  animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.8); }
  50% { opacity: 1; transform: scaleY(1); }
}

/* ===== SECTION COMMON ===== */
.section-header {
  margin-bottom: 64px;
}
.section-label {
  font-family: 'Space Mono', monospace;
  font-size: 0.7rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.section-label::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 1px;
  background: var(--accent);
}
.section-title {
  font-family: 'Fraunces', serif;
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.025em;
  color: var(--fg);
  max-width: 640px;
}
.section-sub {
  font-size: 1.05rem;
  color: var(--fg-2);
  max-width: 560px;
  margin-top: 20px;
  line-height: 1.7;
}

/* ===== PROCESS ===== */
.process {
  padding: 120px 48px;
  max-width: 1200px;
  margin: 0 auto;
}
.process-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.step {
  display: grid;
  grid-template-columns: 80px 1fr 80px;
  gap: 32px;
  align-items: center;
  padding: 40px 0;
  border-bottom: 1px solid var(--border);
}
.step:first-child { border-top: 1px solid var(--border); }
.step-number {
  font-family: 'Fraunces', serif;
  font-size: 3rem;
  font-weight: 300;
  color: var(--border-accent);
  line-height: 1;
}
.step-body { padding-right: 40px; }
.step-title {
  font-family: 'Fraunces', serif;
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--fg);
  margin-bottom: 12px;
}
.step-desc {
  color: var(--fg-2);
  font-size: 0.95rem;
  line-height: 1.7;
}
.step-connector {
  display: flex;
  justify-content: center;
  padding: 8px 0;
}
.connector-line {
  width: 1px;
  height: 24px;
  background: var(--border-accent);
}

/* ===== MATRIX SECTION ===== */
.matrix-section {
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 120px 48px;
}
.matrix-showcase {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.showcase-title {
  font-family: 'Fraunces', serif;
  font-size: clamp(1.8rem, 3.5vw, 3rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.025em;
  color: var(--fg);
  margin-bottom: 24px;
  margin-top: 16px;
}
.showcase-body {
  color: var(--fg-2);
  font-size: 1rem;
  line-height: 1.75;
  margin-bottom: 48px;
}
.matrix-stats {
  display: flex;
  gap: 40px;
}
.stat-number {
  font-family: 'Fraunces', serif;
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 8px;
}
.stat-label {
  font-family: 'Space Mono', monospace;
  font-size: 0.65rem;
  color: var(--fg-3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
/* Heatmap */
.matrix-heatmap {
  position: relative;
  padding: 32px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
}
.heatmap-label-top {
  font-family: 'Space Mono', monospace;
  font-size: 0.6rem;
  color: var(--fg-3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}
.heatmap-label-side {
  font-family: 'Space Mono', monospace;
  font-size: 0.6rem;
  color: var(--fg-3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  position: absolute;
  left: 8px;
  top: 50%;
  transform: rotate(-90deg) translateX(-50%);
  transform-origin: left center;
  width: max-content;
}
.heatmap-grid {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 3px;
  margin-left: 40px;
}
.heatmap-cell {
  aspect-ratio: 1;
  border-radius: 2px;
  min-height: 20px;
}
.heatmap-legend {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 20px;
  margin-left: 40px;
  font-family: 'Space Mono', monospace;
  font-size: 0.6rem;
  color: var(--fg-3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.legend-bar {
  flex: 1;
  max-width: 120px;
  height: 6px;
  border-radius: 3px;
  background: linear-gradient(to right, #1a1d24, #2c3040, #454968, #f59e0b);
}

/* ===== PRINCIPLES ===== */
.principles-section {
  padding: 120px 48px;
  max-width: 1200px;
  margin: 0 auto;
}
.principles-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 40px;
}
.principle-card {
  background: var(--bg);
  padding: 28px;
  position: relative;
  transition: background 0.2s ease;
}
.principle-card:hover { background: var(--bg-2); }
.principle-card--featured {
  grid-column: span 2;
  background: var(--bg-2);
  border-left: 2px solid var(--accent);
}
.principle-num {
  font-family: 'Space Mono', monospace;
  font-size: 0.65rem;
  color: var(--fg-3);
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}
.principle-name {
  font-family: 'Fraunces', serif;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--fg);
  margin-bottom: 10px;
}
.principle-desc {
  font-size: 0.85rem;
  color: var(--fg-2);
  line-height: 1.6;
}
.principle-example {
  margin-top: 16px;
  padding: 12px;
  background: var(--accent-glow);
  border-left: 2px solid var(--accent);
  border-radius: 0 2px 2px 0;
  font-size: 0.82rem;
  color: var(--fg-2);
  line-height: 1.6;
}
.principle-example-label {
  font-family: 'Space Mono', monospace;
  font-size: 0.6rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  display: block;
  margin-bottom: 6px;
}
.principles-note {
  font-family: 'Space Mono', monospace;
  font-size: 0.7rem;
  color: var(--fg-3);
  text-align: center;
  letter-spacing: 0.05em;
}

/* ===== WHYNESS ===== */
.whyness {
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 100px 48px;
}
.whyness-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
}
.whyness-block {
  background: var(--bg);
  padding: 48px 40px;
}
.whyness-icon {
  margin-bottom: 24px;
}
.whyness-title {
  font-family: 'Fraunces', serif;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--fg);
  margin-bottom: 14px;
}
.whyness-desc {
  font-size: 0.9rem;
  color: var(--fg-2);
  line-height: 1.7;
}

/* ===== CLOSING ===== */
.closing {
  padding: 140px 48px 160px;
  text-align: center;
}
.closing-inner {
  max-width: 900px;
  margin: 0 auto;
  position: relative;
}
.closing-badge {
  display: inline-block;
  margin-bottom: 48px;
  padding: 10px 24px;
  border: 1px solid var(--border-accent);
  border-radius: 100px;
  background: var(--accent-dim);
}
.badge-text {
  font-family: 'Space Mono', monospace;
  font-size: 0.65rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.badge-line { display: block; }
.closing-headline {
  font-family: 'Fraunces', serif;
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--fg);
  margin-bottom: 32px;
}
.closing-body {
  font-size: 1.1rem;
  color: var(--fg-2);
  line-height: 1.75;
  max-width: 580px;
  margin: 0 auto 40px;
}
.closing-meta {
  border-top: 1px solid var(--border);
  padding-top: 32px;
}
.closing-meta-text {
  font-family: 'Space Mono', monospace;
  font-size: 0.7rem;
  color: var(--fg-3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ===== FOOTER ===== */
.footer {
  border-top: 1px solid var(--border);
  padding: 80px 48px 40px;
  background: var(--bg);
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 80px;
  margin-bottom: 60px;
}
.footer-logo {
  font-family: 'Fraunces', serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--fg);
  display: block;
  margin-bottom: 16px;
}
.footer-tagline {
  font-size: 0.85rem;
  color: var(--fg-3);
  line-height: 1.6;
}
.footer-links {
  display: flex;
  gap: 64px;
}
.footer-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-col-title {
  font-family: 'Space Mono', monospace;
  font-size: 0.65rem;
  color: var(--fg-3);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 6px;
}
.footer-col span {
  font-size: 0.85rem;
  color: var(--fg-2);
}
.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding-top: 32px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: 'Space Mono', monospace;
  font-size: 0.65rem;
  color: var(--fg-3);
}
.footer-triz-label {
  font-style: italic;
  opacity: 0.6;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .nav { padding: 16px 24px; }
  .hero {
    grid-template-columns: 1fr;
    padding: 120px 24px 60px;
    gap: 48px;
    min-height: auto;
  }
  .hero-visual { order: -1; }
  .process { padding: 80px 24px; }
  .step { grid-template-columns: 60px 1fr; }
  .step-visual { display: none; }
  .matrix-showcase { grid-template-columns: 1fr; gap: 48px; }
  .principles-section { padding: 80px 24px; }
  .principles-grid { grid-template-columns: 1fr 1fr; }
  .principle-card--featured { grid-column: span 2; }
  .whyness-inner { grid-template-columns: 1fr; }
  .closing { padding: 80px 24px 100px; }
  .footer-inner { grid-template-columns: 1fr; gap: 40px; }
  .footer-links { gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
  .matrix-stats { flex-wrap: wrap; gap: 24px; }
  .showcase-title { font-size: 2rem; }
}
@media (max-width: 600px) {
  .principles-grid { grid-template-columns: 1fr; }
  .principle-card--featured { grid-column: span 1; }
  .footer-links { flex-direction: column; gap: 24px; }
}