@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=JetBrains+Mono:wght@300;400;500;600&family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  --bg-deep: #0a0a0f;
  --bg-card: #111118;
  --bg-elevated: #1a1a24;
  --gold: #d4a853;
  --gold-light: #f0d890;
  --gold-dim: #8a6d2b;
  --amber: #e8a838;
  --cyan: #38d4e8;
  --cyan-dim: #1a6a74;
  --emerald: #38e888;
  --rose: #e83868;
  --violet: #8838e8;
  --text-primary: #e8e8f0;
  --text-secondary: #8888a0;
  --text-dim: #555570;
  --border: #2a2a3a;
  --glow-gold: rgba(212, 168, 83, 0.15);
  --glow-cyan: rgba(56, 212, 232, 0.15);
}

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

html {
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: var(--gold-dim) var(--bg-deep);
}

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg-deep);
  color: var(--text-primary);
  overflow-x: hidden;
  line-height: 1.6;
}

/* ═══════════════════════════════════════════
   PARTICLES BACKGROUND
   ═══════════════════════════════════════════ */
.particles-bg {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.particle {
  position: absolute;
  width: 2px; height: 2px;
  background: var(--gold);
  border-radius: 50%;
  opacity: 0;
  animation: particleFloat linear infinite;
}

@keyframes particleFloat {
  0% { opacity: 0; transform: translateY(100vh) scale(0); }
  10% { opacity: 0.6; }
  90% { opacity: 0.6; }
  100% { opacity: 0; transform: translateY(-100px) scale(1); }
}

/* ═══════════════════════════════════════════
   NAVIGATION
   ═══════════════════════════════════════════ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 16px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(212, 168, 83, 0.1);
  transition: all 0.4s;
}

.nav.scrolled {
  padding: 10px 40px;
  background: rgba(10, 10, 15, 0.95);
}

.nav-brand {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 2px;
  color: var(--gold);
}

.nav-brand span {
  color: var(--text-dim);
  font-weight: 300;
  font-size: 12px;
  letter-spacing: 4px;
  margin-left: 12px;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  gap: 8px;
}

.nav-link {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 8px 14px;
  cursor: pointer;
  border-radius: 6px;
  transition: all 0.3s;
}

.nav-link:hover, .nav-link.active {
  color: var(--gold);
  background: var(--glow-gold);
}

/* ═══════════════════════════════════════════
   HERO SECTION
   ═══════════════════════════════════════════ */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  text-align: center;
  padding: 40px;
}

.hero-ring {
  width: 280px;
  height: 280px;
  position: relative;
  margin-bottom: 48px;
}

.hero-ring .ring-outer {
  position: absolute;
  inset: 0;
  border: 2px solid var(--gold-dim);
  border-radius: 50%;
  animation: ringPulse 4s ease-in-out infinite;
}

.hero-ring .ring-mid {
  position: absolute;
  inset: 30px;
  border: 1px solid rgba(212, 168, 83, 0.3);
  border-radius: 50%;
  animation: ringPulse 4s ease-in-out infinite 0.5s;
}

.hero-ring .ring-inner {
  position: absolute;
  inset: 60px;
  border: 1px solid rgba(212, 168, 83, 0.2);
  border-radius: 50%;
  animation: ringPulse 4s ease-in-out infinite 1s;
}

.hero-ring .ring-core {
  position: absolute;
  inset: 80px;
  background: radial-gradient(circle, var(--gold) 0%, transparent 70%);
  border-radius: 50%;
  opacity: 0.3;
  animation: coreBreathe 6s ease-in-out infinite;
}

.hero-ring .flow-dot {
  position: absolute;
  width: 8px; height: 8px;
  background: var(--gold);
  border-radius: 50%;
  box-shadow: 0 0 20px var(--gold), 0 0 40px rgba(212, 168, 83, 0.3);
}

.flow-dot.d1 { animation: orbitFlow 6s linear infinite; }
.flow-dot.d2 { animation: orbitFlow 6s linear infinite 2s; }
.flow-dot.d3 { animation: orbitFlow 6s linear infinite 4s; }

@keyframes orbitFlow {
  0% { top: 0; left: 50%; transform: translate(-50%, -50%); }
  25% { top: 50%; left: 100%; transform: translate(-50%, -50%); }
  50% { top: 100%; left: 50%; transform: translate(-50%, -50%); }
  75% { top: 50%; left: 0; transform: translate(-50%, -50%); }
  100% { top: 0; left: 50%; transform: translate(-50%, -50%); }
}

@keyframes ringPulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.05); opacity: 0.6; }
}

@keyframes coreBreathe {
  0%, 100% { opacity: 0.2; transform: scale(0.9); }
  50% { opacity: 0.5; transform: scale(1.1); }
}

.hero-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 72px;
  font-weight: 700;
  letter-spacing: 8px;
  color: var(--gold);
  text-shadow: 0 0 60px rgba(212, 168, 83, 0.3);
  margin-bottom: 8px;
}

.hero-ampersand {
  color: var(--text-dim);
  font-weight: 300;
}

.hero-tagline {
  font-family: 'JetBrains Mono', monospace;
  font-size: 16px;
  letter-spacing: 6px;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 48px;
}

.hero-principle {
  max-width: 600px;
  font-size: 18px;
  font-style: italic;
  color: var(--text-secondary);
  line-height: 1.8;
  border-left: 2px solid var(--gold-dim);
  padding-left: 24px;
  text-align: left;
}

.hero-scroll {
  position: absolute;
  bottom: 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-dim);
  font-size: 11px;
  letter-spacing: 3px;
  text-transform: uppercase;
  animation: scrollBounce 2s ease-in-out infinite;
}

.hero-scroll .arrow {
  width: 20px;
  height: 20px;
  border-right: 1px solid var(--gold-dim);
  border-bottom: 1px solid var(--gold-dim);
  transform: rotate(45deg);
}

@keyframes scrollBounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(8px); }
}

/* ═══════════════════════════════════════════
   SECTIONS
   ═══════════════════════════════════════════ */
.section {
  padding: 120px 40px;
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.section-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.section-label::before {
  content: '';
  width: 30px;
  height: 1px;
  background: var(--gold-dim);
}

.section-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 48px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 24px;
  line-height: 1.2;
}

.section-subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 700px;
  line-height: 1.7;
  margin-bottom: 60px;
}

/* ═══════════════════════════════════════════
   THE PROBLEM
   ═══════════════════════════════════════════ */
.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.problem-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 36px;
  transition: all 0.4s;
  position: relative;
  overflow: hidden;
}

.problem-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--rose), transparent);
}

.problem-card:hover {
  border-color: var(--rose);
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(232, 56, 104, 0.1);
}

.problem-icon {
  font-size: 32px;
  margin-bottom: 20px;
}

.problem-card h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.problem-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.problem-quote {
  margin-top: 48px;
  padding: 32px 40px;
  background: linear-gradient(135deg, rgba(232, 56, 104, 0.05), transparent);
  border-left: 3px solid var(--rose);
  border-radius: 0 12px 12px 0;
  font-size: 18px;
  font-style: italic;
  color: var(--text-secondary);
  line-height: 1.8;
}

.problem-quote cite {
  display: block;
  margin-top: 12px;
  font-style: normal;
  font-size: 13px;
  color: var(--text-dim);
  font-family: 'JetBrains Mono', monospace;
}

/* ═══════════════════════════════════════════
   THREE PHASES
   ═══════════════════════════════════════════ */
.phases-container {
  display: flex;
  gap: 0;
  margin-top: 40px;
  position: relative;
}

.phases-container::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--gold), var(--emerald));
  opacity: 0.2;
  z-index: 0;
}

.phase-card {
  flex: 1;
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 48px 36px;
  text-align: center;
  position: relative;
  z-index: 1;
  transition: all 0.4s;
  cursor: pointer;
}

.phase-card:first-child { border-radius: 16px 0 0 16px; }
.phase-card:last-child { border-radius: 0 16px 16px 0; }

.phase-card:hover {
  transform: translateY(-4px);
  z-index: 2;
}

.phase-card.inhale { border-top: 3px solid var(--cyan); }
.phase-card.inhale:hover { box-shadow: 0 20px 60px rgba(56, 212, 232, 0.15); }
.phase-card.hold { border-top: 3px solid var(--gold); }
.phase-card.hold:hover { box-shadow: 0 20px 60px rgba(212, 168, 83, 0.15); }
.phase-card.exhale { border-top: 3px solid var(--emerald); }
.phase-card.exhale:hover { box-shadow: 0 20px 60px rgba(56, 232, 136, 0.15); }

.phase-number {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--text-dim);
  letter-spacing: 2px;
  margin-bottom: 16px;
}

.phase-icon {
  font-size: 48px;
  margin-bottom: 20px;
}

.phase-name {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 8px;
}

.phase-card.inhale .phase-name { color: var(--cyan); }
.phase-card.hold .phase-name { color: var(--gold); }
.phase-card.exhale .phase-name { color: var(--emerald); }

.phase-bio {
  font-size: 13px;
  color: var(--text-dim);
  font-style: italic;
  margin-bottom: 16px;
}

.phase-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.phase-layers {
  margin-top: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
}

.phase-layer-tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  padding: 4px 10px;
  border-radius: 20px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  color: var(--text-dim);
}

/* ═══════════════════════════════════════════
   12 LAYERS
   ═══════════════════════════════════════════ */
.layers-visual {
  display: flex;
  gap: 40px;
  margin-top: 40px;
}

.layers-stack {
  flex: 0 0 380px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.layer-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s;
  border: 1px solid transparent;
  position: relative;
}

.layer-bar:hover, .layer-bar.active {
  background: var(--bg-elevated);
  border-color: var(--border);
}

.layer-bar.active {
  border-color: var(--gold-dim);
  box-shadow: 0 0 20px var(--glow-gold);
}

.layer-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--text-dim);
  width: 28px;
  text-align: center;
}

.layer-bar-fill {
  flex: 1;
  height: 6px;
  background: var(--bg-elevated);
  border-radius: 3px;
  overflow: hidden;
  position: relative;
}

.layer-bar-fill-inner {
  height: 100%;
  border-radius: 3px;
  transition: width 0.6s ease;
}

.layer-bar.phase-inhale .layer-bar-fill-inner { background: var(--cyan); }
.layer-bar.phase-hold .layer-bar-fill-inner { background: var(--gold); }
.layer-bar.phase-exhale .layer-bar-fill-inner { background: var(--emerald); }

.layer-bar-name {
  font-size: 12px;
  color: var(--text-secondary);
  width: 120px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.layer-detail {
  flex: 1;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px;
  position: sticky;
  top: 100px;
  align-self: flex-start;
  min-height: 500px;
}

.layer-detail-phase {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.layer-detail-phase.inhale { color: var(--cyan); }
.layer-detail-phase.hold { color: var(--gold); }
.layer-detail-phase.exhale { color: var(--emerald); }

.layer-detail-num {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 64px;
  font-weight: 700;
  color: var(--text-dim);
  opacity: 0.3;
  position: absolute;
  top: 20px;
  right: 30px;
}

.layer-detail h2 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 8px;
}

.layer-detail-type {
  display: inline-block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 2px;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 20px;
}

.layer-detail-type.deterministic {
  background: rgba(56, 232, 136, 0.1);
  color: var(--emerald);
  border: 1px solid rgba(56, 232, 136, 0.2);
}

.layer-detail-type.adaptive {
  background: rgba(136, 56, 232, 0.1);
  color: var(--violet);
  border: 1px solid rgba(136, 56, 232, 0.2);
}

.layer-detail-type.hybrid {
  background: rgba(212, 168, 83, 0.1);
  color: var(--gold);
  border: 1px solid rgba(212, 168, 83, 0.2);
}

.layer-bio-line {
  font-style: italic;
  color: var(--text-secondary);
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
  font-size: 15px;
  line-height: 1.6;
}

.layer-eng-line {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  color: var(--text-dim);
  margin-bottom: 24px;
  padding: 12px 16px;
  background: rgba(255,255,255,0.02);
  border-radius: 8px;
  border-left: 2px solid var(--border);
}

.layer-detail-section {
  margin-bottom: 24px;
}

.layer-detail-section h4 {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 12px;
}

.layer-detail-section ul {
  list-style: none;
  padding: 0;
}

.layer-detail-section li {
  font-size: 14px;
  color: var(--text-secondary);
  padding: 6px 0;
  padding-left: 16px;
  position: relative;
  line-height: 1.6;
}

.layer-detail-section li::before {
  content: '>';
  position: absolute;
  left: 0;
  color: var(--gold-dim);
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
}

/* ═══════════════════════════════════════════
   CLARITY LADDER
   ═══════════════════════════════════════════ */
.ladder-container {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-top: 40px;
  max-width: 800px;
}

.ladder-rung {
  display: flex;
  align-items: stretch;
  cursor: pointer;
  transition: all 0.3s;
  border: 1px solid transparent;
  border-radius: 0;
  position: relative;
}

.ladder-rung:first-child { border-radius: 16px 16px 0 0; }
.ladder-rung:last-child { border-radius: 0 0 16px 16px; }

.ladder-rung:hover {
  background: var(--bg-elevated);
}

.ladder-rung.active {
  background: var(--bg-card);
  border-color: var(--gold-dim);
  z-index: 2;
  border-radius: 12px;
  box-shadow: 0 10px 40px var(--glow-gold);
}

.ladder-level {
  width: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 28px;
  font-weight: 700;
  padding: 24px;
}

.ladder-rung:nth-child(1) .ladder-level { color: #333; }
.ladder-rung:nth-child(2) .ladder-level { color: #666; }
.ladder-rung:nth-child(3) .ladder-level { color: #999; }
.ladder-rung:nth-child(4) .ladder-level { color: var(--gold); }
.ladder-rung:nth-child(5) .ladder-level { color: var(--gold-light); }

.ladder-content {
  flex: 1;
  padding: 24px;
  border-left: 1px solid var(--border);
}

.ladder-name {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 4px;
}

.ladder-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.ladder-expanded {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

.ladder-expanded p {
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.7;
  margin-bottom: 8px;
}

.ladder-rule {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  padding: 8px 12px;
  background: rgba(255,255,255,0.02);
  border-radius: 6px;
  border-left: 2px solid var(--gold-dim);
  color: var(--text-secondary);
  margin-top: 8px;
}

/* ═══════════════════════════════════════════
   VALIDATIONS
   ═══════════════════════════════════════════ */
.validations-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.validation-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 36px;
  transition: all 0.4s;
  position: relative;
  overflow: hidden;
}

.validation-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--emerald), transparent);
}

.validation-card:hover {
  border-color: var(--emerald);
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(56, 232, 136, 0.1);
}

.validation-badge {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--emerald);
  background: rgba(56, 232, 136, 0.1);
  padding: 4px 12px;
  border-radius: 20px;
  display: inline-block;
  margin-bottom: 16px;
}

.validation-card h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 8px;
}

.validation-card .val-org {
  font-size: 13px;
  color: var(--gold);
  margin-bottom: 12px;
}

.validation-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ═══════════════════════════════════════════
   PRINCIPLE (CLOSING)
   ═══════════════════════════════════════════ */
.principle-section {
  min-height: 80vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  padding: 120px 40px;
}

.principle-ring {
  width: 200px; height: 200px;
  border: 1px solid var(--gold-dim);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 48px;
  position: relative;
  animation: ringPulse 4s ease-in-out infinite;
}

.principle-ring::before {
  content: '';
  position: absolute;
  inset: 20px;
  border: 1px solid rgba(212, 168, 83, 0.2);
  border-radius: 50%;
  animation: ringPulse 4s ease-in-out infinite 0.5s;
}

.principle-ring .inner-glow {
  width: 60px; height: 60px;
  background: radial-gradient(circle, var(--gold) 0%, transparent 70%);
  border-radius: 50%;
  opacity: 0.4;
  animation: coreBreathe 6s ease-in-out infinite;
}

.principle-text {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 36px;
  font-weight: 300;
  color: var(--text-primary);
  max-width: 700px;
  line-height: 1.6;
  margin-bottom: 24px;
}

.principle-text em {
  color: var(--gold);
  font-style: normal;
  font-weight: 600;
}

.principle-credit {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-top: 32px;
}

.principle-credit span {
  color: var(--gold);
}

/* ═══════════════════════════════════════════
   ORIGIN STORY
   ═══════════════════════════════════════════ */
.origin-timeline {
  margin-top: 40px;
  position: relative;
  padding-left: 40px;
}

.origin-timeline::before {
  content: '';
  position: absolute;
  top: 0; bottom: 0;
  left: 15px;
  width: 2px;
  background: linear-gradient(180deg, var(--gold-dim), var(--gold), var(--gold-dim));
}

.origin-item {
  position: relative;
  margin-bottom: 40px;
  padding-left: 30px;
}

.origin-item::before {
  content: '';
  position: absolute;
  left: -29px;
  top: 8px;
  width: 10px; height: 10px;
  background: var(--gold);
  border-radius: 50%;
  box-shadow: 0 0 15px rgba(212, 168, 83, 0.4);
}

.origin-item h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.origin-item p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ═══════════════════════════════════════════
   ANTI-HALLUCINATION FLOW
   ═══════════════════════════════════════════ */
.flow-demo {
  margin-top: 40px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px;
  overflow: hidden;
}

.flow-step {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 16px 0;
  border-bottom: 1px solid rgba(255,255,255,0.03);
  transition: all 0.3s;
  opacity: 0.5;
}

.flow-step.active {
  opacity: 1;
}

.flow-step-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--gold-dim);
  width: 40px;
  text-align: center;
  flex-shrink: 0;
}

.flow-step-layer {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  font-size: 15px;
  width: 160px;
  flex-shrink: 0;
}

.flow-step-action {
  font-size: 14px;
  color: var(--text-secondary);
  flex: 1;
}

.flow-step-tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  padding: 3px 10px;
  border-radius: 20px;
  flex-shrink: 0;
}

.flow-step-tag.pass {
  background: rgba(56, 232, 136, 0.1);
  color: var(--emerald);
  border: 1px solid rgba(56, 232, 136, 0.2);
}

.flow-step-tag.transform {
  background: rgba(212, 168, 83, 0.1);
  color: var(--gold);
  border: 1px solid rgba(212, 168, 83, 0.2);
}

.flow-step-tag.gate {
  background: rgba(232, 56, 104, 0.1);
  color: var(--rose);
  border: 1px solid rgba(232, 56, 104, 0.2);
}

.flow-play-btn {
  margin-top: 24px;
  background: linear-gradient(135deg, var(--gold-dim), var(--gold));
  border: none;
  color: var(--bg-deep);
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  padding: 12px 32px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s;
}

.flow-play-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(212, 168, 83, 0.3);
}

/* ═══════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════ */
@media (max-width: 900px) {
  .hero-title { font-size: 42px; letter-spacing: 4px; }
  .hero-tagline { font-size: 12px; letter-spacing: 4px; }
  .section-title { font-size: 32px; }
  .problem-grid { grid-template-columns: 1fr; }
  .phases-container { flex-direction: column; }
  .phase-card:first-child, .phase-card:last-child { border-radius: 16px; }
  .layers-visual { flex-direction: column; }
  .layers-stack { flex: none; }
  .layer-detail { position: static; }
  .validations-grid { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .principle-text { font-size: 24px; }
}