/* ============================================
   ORACLES, NOT ORG CHARTS
   Terminal Command Center × Scientific Instrument
   ============================================ */

:root {
  /* Core palette - electric terminal */
  --bg-deep: #0a0e14;
  --bg-surface: #0d1219;
  --bg-elevated: #121a24;
  --bg-hover: #1a2433;

  /* Text hierarchy */
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --text-muted: #484f58;

  /* Accents */
  --accent-cyan: #00ffd5;
  --accent-cyan-dim: rgba(0, 255, 213, 0.15);
  --accent-cyan-glow: rgba(0, 255, 213, 0.4);
  --accent-green: #3fb950;
  --accent-red: #f85149;
  --accent-yellow: #d29922;
  --accent-purple: #a371f7;

  /* Structure */
  --border: rgba(48, 54, 61, 0.8);
  --border-accent: rgba(0, 255, 213, 0.3);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 40px rgba(0, 255, 213, 0.15);

  /* Typography scale */
  --font-mono: 'JetBrains Mono', monospace;
  --font-serif: 'Instrument Serif', serif;
  --font-sans: 'Space Grotesk', sans-serif;
}

/* ============================================
   RESET & BASE
   ============================================ */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-deep);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-weight: 500;
  line-height: 1.2;
}

p {
  margin: 0;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
}

code, pre {
  font-family: var(--font-mono);
}

.mono {
  font-family: var(--font-mono);
  font-size: 0.85em;
  letter-spacing: 0.02em;
}

/* ============================================
   BACKGROUND EFFECTS
   ============================================ */
.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1000;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

.grid-bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  background-image:
    linear-gradient(rgba(0, 255, 213, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 255, 213, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black, transparent);
}

.particle-canvas {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.6;
}

/* ============================================
   NAVIGATION
   ============================================ */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 14, 20, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--accent-cyan);
  letter-spacing: 0.1em;
}

.nav__icon {
  font-size: 1.2em;
  animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% { opacity: 1; text-shadow: 0 0 10px var(--accent-cyan-glow); }
  50% { opacity: 0.7; text-shadow: none; }
}

.nav__links {
  display: flex;
  gap: 8px;
}

.nav__links a {
  padding: 8px 16px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

.nav__links a:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
}

.nav__link--highlight {
  color: var(--cyan) !important;
  border: 1px solid rgba(0, 255, 213, 0.3);
  background: rgba(0, 255, 213, 0.05);
}

.nav__link--highlight:hover {
  background: rgba(0, 255, 213, 0.15) !important;
  border-color: rgba(0, 255, 213, 0.5);
  box-shadow: 0 0 20px rgba(0, 255, 213, 0.2);
}

.nav__status {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(63, 185, 80, 0.1);
  border: 1px solid rgba(63, 185, 80, 0.3);
  border-radius: 999px;
  font-size: 0.8rem;
  color: var(--accent-green);
}

.status-dot {
  width: 8px;
  height: 8px;
  background: var(--accent-green);
  border-radius: 50%;
  animation: blink 1.5s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  min-height: 85vh;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 24px;
  position: relative;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: -200px;
  width: 800px;
  height: 600px;
  background: url('assets/hero-bg.png') no-repeat center;
  background-size: contain;
  opacity: 0.15;
  pointer-events: none;
  z-index: 0;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 16px;
  background: var(--accent-cyan-dim);
  border: 1px solid var(--border-accent);
  border-radius: 999px;
  font-size: 0.75rem;
  color: var(--accent-cyan);
  letter-spacing: 0.15em;
  margin-bottom: 24px;
}

.pulse {
  width: 8px;
  height: 8px;
  background: var(--accent-cyan);
  border-radius: 50%;
  animation: pulse-badge 2s ease-in-out infinite;
}

@keyframes pulse-badge {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.3); opacity: 0.5; }
}

.hero__title {
  font-family: var(--font-serif);
  font-size: clamp(2.8rem, 5vw, 4.5rem);
  font-weight: 400;
  line-height: 1.1;
  margin-bottom: 24px;
}

.hero__line {
  display: block;
}

.hero__line--accent {
  color: var(--accent-cyan);
  font-style: italic;
  text-shadow: 0 0 60px var(--accent-cyan-glow);
}

.hero__sub {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 480px;
  margin-bottom: 32px;
}

.hero__ctas {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  position: relative;
  padding: 14px 28px;
  border: none;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 500;
  transition: all 0.3s ease;
  overflow: hidden;
}

.btn--primary {
  background: var(--accent-cyan);
  color: var(--bg-deep);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 40px var(--accent-cyan-glow);
}

.btn__glow {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transform: translateX(-100%);
  transition: transform 0.6s ease;
}

.btn--primary:hover .btn__glow {
  transform: translateX(100%);
}

.btn--ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-secondary);
}

.btn--ghost:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  background: var(--accent-cyan-dim);
}

/* Hero Panel */
.hero__panel {
  position: relative;
}

.panel {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-md), var(--shadow-glow);
}

.panel__header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  font-size: 0.8rem;
  color: var(--accent-cyan);
  letter-spacing: 0.1em;
}

.panel__dot {
  width: 8px;
  height: 8px;
  background: var(--accent-cyan);
  border-radius: 50%;
}

.panel__text {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 24px;
}

.metrics {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.metric__label {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.metric__bar {
  height: 6px;
  background: var(--bg-hover);
  border-radius: 999px;
  overflow: hidden;
}

.metric__fill {
  height: 100%;
  width: var(--width);
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
  border-radius: 999px;
  transition: width 1s ease-out;
}

.metric__bar--alt .metric__fill {
  background: linear-gradient(90deg, var(--accent-green), var(--accent-cyan));
}

/* ============================================
   SECTIONS BASE
   ============================================ */
.section {
  position: relative;
  padding: 100px 24px;
  max-width: 1200px;
  margin: 0 auto;
  overflow: hidden;
}

.section--dark {
  background: var(--bg-surface);
  max-width: 100%;
  margin: 0;
}

.section--dark > * {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}

.section__header {
  margin-bottom: 48px;
}

.section__number {
  display: inline-block;
  padding: 4px 12px;
  background: var(--accent-cyan-dim);
  border-radius: var(--radius-sm);
  color: var(--accent-cyan);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}

.section__title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 12px;
}

.section__sub {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
}

/* ============================================
   DIFF VIEWER
   ============================================ */
.diff-viewer {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.diff-viewer__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.diff-viewer__badge {
  padding: 4px 10px;
  background: var(--bg-hover);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
}

.diff-viewer__body {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.diff-col {
  padding: 24px;
}

.diff-col--before {
  background: rgba(248, 81, 73, 0.05);
  border-right: 1px solid var(--border);
}

.diff-col--after {
  background: rgba(63, 185, 80, 0.05);
}

.diff-col__header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  font-size: 0.85rem;
}

.diff-marker {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  font-weight: 700;
}

.diff-marker--del {
  background: rgba(248, 81, 73, 0.2);
  color: var(--accent-red);
}

.diff-marker--add {
  background: rgba(63, 185, 80, 0.2);
  color: var(--accent-green);
}

.diff-list li {
  display: flex;
  gap: 12px;
  padding: 8px 0;
  font-size: 0.9rem;
  border-bottom: 1px solid rgba(255,255,255,0.03);
}

.diff-list li:last-child {
  border-bottom: none;
}

.line-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  min-width: 20px;
}

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

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

/* ============================================
   CONTROL DIAGRAM
   ============================================ */
.control-diagram {
  display: flex;
  align-items: stretch;
  gap: 24px;
  padding: 40px 0;
}

.control-node {
  flex: 1;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  text-align: center;
  transition: all 0.3s ease;
}

.control-node:hover {
  transform: translateY(-4px);
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
}

.control-node__icon {
  font-size: 2rem;
  margin-bottom: 12px;
  color: var(--accent-cyan);
}

.control-node h4 {
  font-size: 1.1rem;
  margin-bottom: 4px;
}

.control-node .mono {
  display: block;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.control-node ul {
  text-align: left;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.control-node li {
  padding: 6px 0;
  padding-left: 16px;
  position: relative;
}

.control-node li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--accent-cyan);
}

.control-flow {
  display: flex;
  align-items: center;
  width: 80px;
  flex-shrink: 0;
}

.flow-arrow {
  width: 100%;
  height: 60px;
}

.flow-line {
  stroke-dasharray: 8 4;
  animation: flow 1s linear infinite;
}

@keyframes flow {
  to { stroke-dashoffset: -12; }
}

/* ============================================
   FUNNEL VISUALIZATION
   ============================================ */
.funnel-viz {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px;
  display: flex;
  flex-direction: column;
  gap: 32px;
  align-items: center;
}

.funnel-stage__label {
  color: var(--text-muted);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  margin-bottom: 16px;
  text-align: center;
}

.funnel-items {
  display: flex;
  gap: 16px;
  justify-content: center;
}

.funnel-item {
  padding: 12px 24px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
  animation: float 3s ease-in-out infinite;
}

.funnel-item--a { animation-delay: 0s; }
.funnel-item--b { animation-delay: 0.5s; }
.funnel-item--c { animation-delay: 1s; }

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

.funnel-filter {
  width: 100%;
  max-width: 400px;
}

.filter-gate {
  text-align: center;
  padding: 20px;
  background: var(--accent-cyan-dim);
  border: 2px dashed var(--border-accent);
  border-radius: var(--radius-md);
  color: var(--accent-cyan);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
}

.filter-lines {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 12px;
}

.filter-lines span {
  width: 40px;
  height: 2px;
  background: var(--accent-cyan);
  opacity: 0.5;
}

.funnel-results {
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: 100%;
  max-width: 500px;
}

.result {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  background: var(--bg-elevated);
  border-radius: var(--radius-md);
  border-left: 3px solid;
}

.result--fail {
  border-left-color: var(--accent-red);
  opacity: 0.6;
}

.result--pass {
  border-left-color: var(--accent-green);
}

.result__patch {
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

.result__verdict {
  font-size: 0.8rem;
}

.result--fail .result__verdict {
  color: var(--accent-red);
}

.result--pass .result__verdict {
  color: var(--accent-green);
}

.funnel-output {
  padding-top: 16px;
}

.ship-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  background: var(--accent-green);
  color: var(--bg-deep);
  border-radius: var(--radius-md);
  font-weight: 700;
  letter-spacing: 0.1em;
  animation: ship-pulse 2s ease-in-out infinite;
}

@keyframes ship-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(63, 185, 80, 0.4); }
  50% { box-shadow: 0 0 0 12px rgba(63, 185, 80, 0); }
}

.ship-icon {
  font-size: 0.8em;
}

/* ============================================
   CONSTRAINT CARDS
   ============================================ */
.constraint-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.constraint-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all 0.3s ease;
}

.constraint-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-4px);
}

.constraint-card__header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.constraint-icon {
  font-size: 1.4rem;
  color: var(--accent-cyan);
}

.constraint-card h4 {
  font-size: 1.05rem;
}

.constraint-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 16px;
}

.oracle-tag {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: var(--accent-cyan-dim);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  color: var(--accent-cyan);
}

.oracle-dot {
  width: 6px;
  height: 6px;
  background: var(--accent-cyan);
  border-radius: 50%;
}

/* ============================================
   EXAMPLE COMPARISON
   ============================================ */
.example-comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.example-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.example-card--story {
  border-top: 3px solid var(--accent-yellow);
}

.example-card--proof {
  border-top: 3px solid var(--accent-green);
}

.example-card__badge {
  display: inline-block;
  padding: 4px 12px;
  background: var(--bg-hover);
  border-radius: var(--radius-sm);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.example-card blockquote {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-style: italic;
  color: var(--text-secondary);
  padding-left: 20px;
  border-left: 2px solid var(--border);
}

.proof-steps {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.proof-steps li {
  display: flex;
  gap: 14px;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.proof-steps li strong {
  color: var(--text-primary);
}

.proof-steps code {
  padding: 2px 8px;
  background: var(--bg-hover);
  border-radius: var(--radius-sm);
  font-size: 0.85em;
  color: var(--accent-cyan);
}

.step-marker {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 24px;
  height: 24px;
  background: var(--accent-cyan-dim);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-cyan);
}

.example-card__verdict {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  font-size: 0.9rem;
  color: var(--text-muted);
}

.example-card__verdict--pass {
  color: var(--accent-green);
}

.verdict-icon {
  font-size: 1.2em;
}

/* ============================================
   CODE BLOCKS
   ============================================ */
.code-blocks {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.code-block {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.code-block__header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 20px;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
}

.code-block__dots {
  display: flex;
  gap: 6px;
}

.code-block__dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--text-muted);
  opacity: 0.4;
}

.code-block__dots span:nth-child(1) { background: var(--accent-red); }
.code-block__dots span:nth-child(2) { background: var(--accent-yellow); }
.code-block__dots span:nth-child(3) { background: var(--accent-green); }

.code-block__title {
  flex: 1;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.copy-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  color: var(--text-secondary);
  transition: all 0.2s ease;
}

.copy-btn:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  background: var(--accent-cyan-dim);
}

.copy-btn__icon {
  font-size: 1.1em;
}

.code-block pre {
  margin: 0;
  padding: 24px;
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

.code-block code {
  display: block;
}

/* ============================================
   SECTION BACKGROUND IMAGES
   ============================================ */
.section-bg-image {
  position: absolute;
  pointer-events: none;
  z-index: 0;
  opacity: 0.08;
  filter: saturate(0.6);
}

.section-bg-image--control {
  right: -100px;
  top: 50%;
  transform: translateY(-50%);
  width: 500px;
  height: auto;
  mask-image: radial-gradient(ellipse at center, black 40%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 40%, transparent 75%);
}

.section-bg-image--funnel {
  left: -150px;
  top: 50%;
  transform: translateY(-50%);
  width: 400px;
  height: auto;
  mask-image: radial-gradient(ellipse at center, black 40%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 40%, transparent 75%);
}

/* ============================================
   CLOSING SECTION
   ============================================ */
.section--close {
  text-align: center;
  padding: 140px 24px;
  background: linear-gradient(180deg, var(--bg-deep) 0%, var(--bg-surface) 100%);
  overflow: hidden;
}

.close-oracle-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 500px;
  height: auto;
  opacity: 0.06;
  pointer-events: none;
  filter: saturate(0.5);
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 65%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 65%);
}

.close-title {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 5vw, 4rem);
  margin-bottom: 24px;
}

.close-title__line {
  display: block;
}

.close-title__line--em {
  color: var(--accent-cyan);
  font-style: italic;
}

.close-sub {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.close-tagline {
  display: inline-block;
  padding: 12px 24px;
  background: var(--accent-cyan-dim);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-md);
  color: var(--accent-cyan);
  font-size: 0.85rem;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  padding: 32px 24px;
  border-top: 1px solid var(--border);
  background: var(--bg-surface);
}

.footer__inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.footer__text {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer__mark {
  color: var(--accent-cyan);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1024px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 48px;
    min-height: auto;
    padding: 60px 24px;
  }

  .control-diagram {
    flex-direction: column;
    gap: 16px;
  }

  .control-flow {
    width: 60px;
    height: 40px;
    transform: rotate(90deg);
  }

  .constraint-cards {
    grid-template-columns: 1fr;
  }

  .example-comparison {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav__links {
    display: none;
  }

  .diff-viewer__body {
    grid-template-columns: 1fr;
  }

  .diff-col--before {
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  .funnel-items {
    flex-direction: column;
    align-items: center;
  }

  .footer__inner {
    flex-direction: column;
    text-align: center;
  }

  /* Hide background images on tablet/mobile */
  .hero::before,
  .section-bg-image,
  .close-oracle-icon {
    display: none;
  }
}

@media (max-width: 480px) {
  .section {
    padding: 60px 16px;
  }

  .hero {
    padding: 40px 16px;
  }

  .hero__title {
    font-size: clamp(2rem, 8vw, 2.8rem);
  }

  .hero__ctas {
    flex-direction: column;
  }

  .btn {
    width: 100%;
    text-align: center;
  }

  .panel {
    padding: 20px;
  }

  .code-block pre {
    padding: 16px;
    font-size: 0.75rem;
  }

  .section__title {
    font-size: clamp(1.6rem, 6vw, 2rem);
  }
}

/* PRD falsifier: 375px width mobile (iPhone SE / small phones) */
@media (max-width: 375px) {
  body {
    font-size: 15px;
  }

  .hero__badge {
    font-size: 0.65rem;
    padding: 6px 12px;
  }

  .section__number {
    font-size: 0.65rem;
  }

  .diff-list li {
    font-size: 0.8rem;
  }

  .constraint-card {
    padding: 20px;
  }

  .funnel-item {
    padding: 10px 18px;
    font-size: 0.75rem;
  }
}

/* Prevent horizontal scroll */
html, body {
  overflow-x: hidden;
}

/* ============================================
   ENHANCED ANIMATIONS & EFFECTS
   ============================================ */

/* Typewriter cursor effect */
.typewriter-cursor {
  display: inline-block;
  width: 3px;
  height: 1.1em;
  background: var(--accent-cyan);
  margin-left: 4px;
  animation: cursor-blink 0.8s ease-in-out infinite;
  vertical-align: middle;
  box-shadow: 0 0 10px var(--accent-cyan-glow);
}

@keyframes cursor-blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

/* Glitch effect on hover */
.glitch-hover {
  position: relative;
}

.glitch-hover::before,
.glitch-hover::after {
  content: attr(data-text);
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  pointer-events: none;
}

.glitch-hover:hover::before {
  animation: glitch-1 0.3s ease-out;
  color: var(--accent-cyan);
  text-shadow: 2px 0 var(--accent-red);
  opacity: 0.8;
}

.glitch-hover:hover::after {
  animation: glitch-2 0.3s ease-out;
  color: var(--accent-purple);
  text-shadow: -2px 0 var(--accent-green);
  opacity: 0.8;
}

@keyframes glitch-1 {
  0%, 100% { clip-path: inset(0 0 100% 0); }
  20% { clip-path: inset(20% 0 60% 0); transform: translate(-2px, 0); }
  40% { clip-path: inset(40% 0 40% 0); transform: translate(2px, 0); }
  60% { clip-path: inset(60% 0 20% 0); transform: translate(-1px, 0); }
  80% { clip-path: inset(80% 0 5% 0); transform: translate(1px, 0); }
}

@keyframes glitch-2 {
  0%, 100% { clip-path: inset(100% 0 0 0); }
  20% { clip-path: inset(60% 0 20% 0); transform: translate(2px, 0); }
  40% { clip-path: inset(40% 0 40% 0); transform: translate(-2px, 0); }
  60% { clip-path: inset(20% 0 60% 0); transform: translate(1px, 0); }
  80% { clip-path: inset(5% 0 80% 0); transform: translate(-1px, 0); }
}

/* Magnetic button effect */
.btn--magnetic {
  transition: transform 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Enhanced hover states */
.nav__logo:hover .nav__icon {
  animation: spin-glow 0.6s ease-out;
}

@keyframes spin-glow {
  0% { transform: rotate(0deg) scale(1); }
  50% { transform: rotate(180deg) scale(1.2); text-shadow: 0 0 30px var(--accent-cyan); }
  100% { transform: rotate(360deg) scale(1); }
}

/* Scroll reveal animations */
.reveal-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-right.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-scale {
  opacity: 0;
  transform: scale(0.9);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-scale.visible {
  opacity: 1;
  transform: scale(1);
}

/* Staggered reveal delays */
.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }
.stagger-5 { transition-delay: 0.5s; }

/* Terminal scanline effect */
.scanline {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, transparent, var(--accent-cyan-glow), transparent);
  animation: scanline-move 3s linear infinite;
  pointer-events: none;
  opacity: 0.3;
}

@keyframes scanline-move {
  0% { top: -4px; }
  100% { top: 100%; }
}

/* Code block enhanced effects */
.code-block--enhanced {
  position: relative;
  overflow: hidden;
}

.code-block--enhanced::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    180deg,
    transparent 0%,
    rgba(0, 255, 213, 0.02) 50%,
    transparent 100%
  );
  animation: code-scan 4s ease-in-out infinite;
  pointer-events: none;
}

@keyframes code-scan {
  0%, 100% { transform: translateY(-100%); opacity: 0; }
  50% { transform: translateY(100%); opacity: 1; }
}

/* Funnel particle animation */
.funnel-particle {
  position: absolute;
  width: 6px;
  height: 6px;
  background: var(--accent-cyan);
  border-radius: 50%;
  pointer-events: none;
  animation: fall-through 2s ease-in infinite;
  box-shadow: 0 0 10px var(--accent-cyan-glow);
}

@keyframes fall-through {
  0% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
  70% {
    opacity: 0.8;
  }
  100% {
    opacity: 0;
    transform: translateY(200px) scale(0.3);
  }
}

/* Enhanced diff list animation */
.diff-list li {
  transition: all 0.3s ease;
}

.diff-list li:hover {
  background: rgba(255, 255, 255, 0.03);
  padding-left: 8px;
}

.diff-col--before .diff-list li:hover {
  background: rgba(248, 81, 73, 0.08);
}

.diff-col--after .diff-list li:hover {
  background: rgba(63, 185, 80, 0.08);
}

/* Control node pulse effect */
.control-node--active::after {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: var(--radius-lg);
  border: 2px solid var(--accent-cyan);
  animation: node-pulse 2s ease-in-out infinite;
  pointer-events: none;
}

@keyframes node-pulse {
  0%, 100% { opacity: 0; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.02); }
}

/* Result card entrance */
.result--animated {
  animation: result-slide 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  opacity: 0;
}

@keyframes result-slide {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.result--fail.result--animated {
  animation: result-fail 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes result-fail {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 0.6;
    transform: translateX(0);
  }
}

/* Copy button enhanced */
.copy-btn {
  position: relative;
  overflow: hidden;
}

.copy-btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: var(--accent-cyan-dim);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.4s ease, height 0.4s ease;
}

.copy-btn:active::before {
  width: 200%;
  height: 200%;
}

/* Ship badge enhanced */
.ship-badge {
  position: relative;
  overflow: hidden;
}

.ship-badge::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(
    45deg,
    transparent 40%,
    rgba(255, 255, 255, 0.3) 50%,
    transparent 60%
  );
  animation: shine 3s ease-in-out infinite;
}

@keyframes shine {
  0% { transform: translateX(-100%) rotate(45deg); }
  100% { transform: translateX(100%) rotate(45deg); }
}

/* Close section enhanced */
.close-content {
  position: relative;
  z-index: 2;
}

/* Floating animation for decorative elements */
.float-slow {
  animation: float-slow 6s ease-in-out infinite;
}

@keyframes float-slow {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-15px); }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .particle-canvas {
    display: none;
  }
}

/* ============================================
   SHIFTS PAGE STYLES
   ============================================ */

/* Hero variant for shifts page */
.hero--shifts {
  grid-template-columns: 1fr;
  text-align: center;
  min-height: 60vh;
}

.hero--shifts .hero__content {
  max-width: 800px;
  margin: 0 auto;
}

.hero--shifts .hero__sub {
  max-width: 600px;
  margin: 0 auto 32px;
}

.hero--shifts .hero__ctas {
  justify-content: center;
}

/* Full Example Section */
.example-full {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.example-full__card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.example-full__card--before {
  border-top: 3px solid var(--accent-red);
}

.example-full__card--after {
  border-top: 3px solid var(--accent-green);
}

.example-full__header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 24px;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
}

.example-full__content {
  padding: 24px;
}

.example-full__content pre {
  margin: 0;
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--text-secondary);
  white-space: pre-wrap;
  word-break: break-word;
}

.example-full__content code {
  display: block;
}

.example-full__content strong {
  color: var(--accent-cyan);
}

.example-full__problems,
.example-full__wins {
  padding: 20px 24px;
  border-top: 1px solid var(--border);
  background: var(--bg-surface);
}

.example-full__problems h5,
.example-full__wins h5 {
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.example-full__problems ul,
.example-full__wins ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.85rem;
}

.example-full__problems li {
  color: var(--text-secondary);
}

.example-full__wins li {
  color: var(--text-secondary);
}

/* Transformation Diagram */
.transform-diagram {
  max-width: 900px;
  margin: 0 auto;
}

.transform-box {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
}

.transform-box--open {
  border-color: rgba(248, 81, 73, 0.3);
  background: rgba(248, 81, 73, 0.03);
}

.transform-box--closed {
  border-color: rgba(0, 255, 213, 0.3);
  background: rgba(0, 255, 213, 0.03);
}

.transform-box__header {
  display: inline-block;
  padding: 6px 16px;
  background: var(--bg-elevated);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  margin-bottom: 24px;
}

.transform-box--open .transform-box__header {
  color: var(--accent-red);
}

.transform-box--closed .transform-box__header {
  color: var(--accent-cyan);
}

.transform-box__flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.transform-step {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.transform-step__label {
  font-size: 1rem;
  color: var(--text-primary);
}

.transform-step__detail {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.transform-arrow {
  font-size: 1.5rem;
  color: var(--text-muted);
}

.transform-box__feedback {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 20px;
  color: var(--accent-cyan);
  font-size: 0.75rem;
}

.feedback-arrow {
  font-size: 1.2rem;
}

.feedback-arrow--left {
  margin-left: auto;
}

.transform-box__example {
  padding: 12px 20px;
  background: var(--bg-elevated);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  margin-bottom: 16px;
  display: inline-block;
}

.transform-box__verdict {
  font-size: 0.8rem;
  letter-spacing: 0.05em;
}

.transform-box--open .transform-box__verdict {
  color: var(--accent-red);
}

.transform-box--closed .transform-box__verdict {
  color: var(--accent-cyan);
}

.transform-shift {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 32px 0;
  color: var(--accent-cyan);
}

.transform-shift__icon {
  font-size: 1.5rem;
  animation: bounce-down 1.5s ease-in-out infinite;
}

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

.transform-shift__label {
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  padding: 6px 16px;
  background: var(--accent-cyan-dim);
  border-radius: var(--radius-sm);
}

/* Shifts Grid */
.shifts-grid {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.shift-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all 0.3s ease;
}

.shift-card:hover {
  border-color: var(--border-accent);
  transform: translateX(4px);
}

.shift-card__number {
  display: inline-block;
  padding: 4px 12px;
  background: var(--accent-cyan-dim);
  border-radius: var(--radius-sm);
  color: var(--accent-cyan);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  margin-bottom: 12px;
}

.shift-card__title {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  margin-bottom: 8px;
}

.shift-card__phrase {
  color: var(--accent-cyan);
  font-size: 0.85rem;
  margin-bottom: 24px;
}

.shift-card__diff {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.shift-diff {
  padding: 20px;
  border-radius: var(--radius-md);
}

.shift-diff--before {
  background: rgba(248, 81, 73, 0.05);
  border-left: 3px solid var(--accent-red);
}

.shift-diff--after {
  background: rgba(63, 185, 80, 0.05);
  border-left: 3px solid var(--accent-green);
}

.shift-diff__line {
  font-size: 0.85rem;
  padding: 6px 0;
  line-height: 1.5;
}

/* Test Questions */
.test-questions {
  max-width: 800px;
  margin: 0 auto 48px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.test-question {
  display: flex;
  gap: 20px;
  padding: 24px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  align-items: flex-start;
}

.test-question__num {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  background: var(--accent-cyan-dim);
  border-radius: 50%;
  color: var(--accent-cyan);
  font-size: 0.9rem;
}

.test-question p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.test-question strong {
  color: var(--text-primary);
}

.test-verdict {
  max-width: 600px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.test-verdict__row {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 24px;
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  font-size: 1rem;
}

.verdict-marker {
  font-size: 1.3rem;
  font-weight: 700;
}

.verdict-marker--yes {
  color: var(--accent-green);
}

.verdict-marker--no {
  color: var(--accent-red);
}

/* Summary Section - Centered */
#summary .section__header {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

#summary .section__number {
  margin-bottom: 16px;
}

/* Summary Table */
.summary-table-wrapper {
  overflow-x: auto;
  display: flex;
  justify-content: center;
  padding: 0 24px;
}

.summary-table {
  width: auto;
  max-width: 1000px;
  border-collapse: collapse;
  background: var(--bg-elevated);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.summary-table th,
.summary-table td {
  padding: 16px 24px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.summary-table th {
  background: var(--bg-surface);
  color: var(--accent-cyan);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  font-weight: 500;
}

.summary-table tbody tr {
  transition: background 0.2s ease;
}

.summary-table tbody tr:hover {
  background: var(--bg-hover);
}

.summary-table tbody tr:last-child td {
  border-bottom: none;
}

.summary-table td:last-child {
  color: var(--accent-cyan);
  white-space: nowrap;
}

/* One Sentence Quote */
.one-sentence {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
  font-family: var(--font-serif);
  font-size: 1.6rem;
  line-height: 1.5;
  color: var(--text-primary);
  border: none;
  padding: 0;
}

.one-sentence p {
  margin-bottom: 16px;
}

.one-sentence__emphasis {
  color: var(--accent-cyan);
  font-style: italic;
  font-size: 1.8rem;
}

/* Responsive for shifts page */
@media (max-width: 1024px) {
  .example-full {
    grid-template-columns: 1fr;
  }

  .shift-card__diff {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}

@media (max-width: 768px) {
  .transform-box__flow {
    flex-direction: column;
    gap: 12px;
  }

  .transform-arrow {
    transform: rotate(90deg);
  }

  .test-question {
    flex-direction: column;
    text-align: center;
    align-items: center;
  }

  .summary-table th,
  .summary-table td {
    padding: 12px 16px;
    font-size: 0.85rem;
  }

  .one-sentence {
    font-size: 1.3rem;
  }

  .one-sentence__emphasis {
    font-size: 1.5rem;
  }
}

@media (max-width: 480px) {
  .shift-card {
    padding: 20px;
  }

  .shift-card__title {
    font-size: 1.2rem;
  }

  .shift-diff {
    padding: 14px;
  }

  .shift-diff__line {
    font-size: 0.8rem;
  }
}

/* ============================================
   CURRICULUM BREADCRUMB
   ============================================ */
.breadcrumb {
  background: rgba(0, 255, 213, 0.03);
  border-bottom: 1px solid rgba(0, 255, 213, 0.1);
  padding: 10px 24px;
}

.breadcrumb__inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
}

.breadcrumb__link {
  color: var(--text-muted);
  transition: color 0.2s ease;
}

.breadcrumb__link:hover {
  color: var(--accent-cyan);
}

.breadcrumb__sep {
  color: var(--text-muted);
  opacity: 0.5;
}

.breadcrumb__current {
  color: var(--accent-cyan);
  font-weight: 500;
}

/* ============================================
   MODULE INTRO (HERO REPLACEMENT)
   ============================================ */
.module-intro {
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 80px 24px;
  position: relative;
}

.module-intro::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse 80% 50% at 50% 30%, rgba(0, 255, 213, 0.08), transparent);
  pointer-events: none;
}

.module-intro__content {
  position: relative;
  z-index: 2;
  max-width: 800px;
}

.module-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 18px;
  background: var(--accent-cyan-dim);
  border: 1px solid var(--border-accent);
  border-radius: 999px;
  font-size: 0.7rem;
  color: var(--accent-cyan);
  letter-spacing: 0.2em;
  margin-bottom: 32px;
}

.module-title {
  font-family: var(--font-serif);
  font-size: clamp(3rem, 8vw, 5rem);
  font-weight: 400;
  line-height: 1.1;
  margin-bottom: 24px;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.module-premise {
  font-size: 1.25rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 48px;
}

.module-premise strong {
  color: var(--accent-cyan);
  display: block;
  font-size: 1.4rem;
  margin-top: 12px;
}

.module-meta {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 48px;
  padding: 32px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.module-meta__item {
  text-align: left;
}

.module-meta__item .mono {
  display: block;
  font-size: 0.7rem;
  color: var(--accent-cyan);
  letter-spacing: 0.15em;
  margin-bottom: 8px;
}

.module-meta__item p {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.module-start {
  padding-top: 16px;
}

/* ============================================
   PROBLEM SECTION
   ============================================ */
.problem-setup {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.problem-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.problem-card h3 {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  margin-bottom: 28px;
  text-align: center;
}

.problem-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.flow-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 20px 28px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.flow-step__num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: var(--accent-cyan-dim);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-cyan);
}

.flow-arrow {
  font-size: 1.5rem;
  color: var(--text-muted);
}

.problem-result {
  text-align: center;
  font-size: 0.95rem;
  color: var(--text-secondary);
  padding: 20px;
  background: rgba(248, 81, 73, 0.05);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--accent-red);
}

.result-bad {
  color: var(--accent-red);
  margin-right: 8px;
}

.problem-why {
  padding: 32px;
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
}

.problem-why h4 {
  font-size: 1rem;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.problem-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.problem-list li {
  font-size: 0.95rem;
  color: var(--text-secondary);
  padding-left: 24px;
  position: relative;
}

.problem-list li::before {
  content: '×';
  position: absolute;
  left: 0;
  color: var(--accent-red);
  font-weight: 700;
}

.problem-list li .del {
  font-weight: 500;
}

.problem-quote {
  text-align: center;
  padding: 48px 32px;
  background: linear-gradient(135deg, var(--bg-surface), var(--bg-elevated));
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-accent);
}

.problem-quote blockquote {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-style: italic;
  color: var(--text-primary);
  line-height: 1.6;
  margin: 0;
}

/* ============================================
   INSIGHT SECTION ENHANCEMENTS
   ============================================ */
.insight-core {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.insight-statement {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 40px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.insight-old {
  font-size: 1.1rem;
  color: var(--text-muted);
  text-decoration: line-through;
  opacity: 0.7;
}

.insight-arrow {
  font-size: 2rem;
  color: var(--accent-cyan);
  text-align: center;
  padding: 16px 0;
}

.insight-new {
  font-size: 1.2rem;
  color: var(--text-primary);
}

.insight-new em {
  color: var(--accent-cyan);
  font-style: normal;
  font-weight: 500;
}

.insight-phrase {
  padding: 40px;
  background: linear-gradient(135deg, rgba(0, 255, 213, 0.08), rgba(0, 255, 213, 0.02));
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-lg);
}

.insight-phrase .mono {
  display: block;
  font-size: 0.7rem;
  color: var(--accent-cyan);
  letter-spacing: 0.2em;
  margin-bottom: 12px;
}

.insight-phrase h3 {
  font-family: var(--font-serif);
  font-size: 2rem;
  color: var(--accent-cyan);
  margin-bottom: 16px;
}

.insight-phrase p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.insight-deeper {
  text-align: center;
  margin-top: 40px;
}

/* ============================================
   FRAMEWORK BLOCKS
   ============================================ */
.framework-block {
  margin-bottom: 48px;
  padding: 40px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.framework-block:last-child {
  margin-bottom: 0;
}

.framework-block__title {
  display: flex;
  align-items: center;
  gap: 16px;
  font-family: var(--font-serif);
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.framework-block__title .mono {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px 12px;
  background: var(--accent-cyan-dim);
  border-radius: var(--radius-sm);
  color: var(--accent-cyan);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
}

.framework-block__desc {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

/* Loop Visualization */
.loop-viz {
  display: flex;
  align-items: stretch;
  justify-content: center;
  gap: 12px;
  padding: 32px 0;
  flex-wrap: wrap;
}

.loop-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px 20px;
  min-width: 140px;
  background: var(--bg-surface);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  text-align: center;
  transition: all 0.3s ease;
}

.loop-step:hover {
  border-color: var(--border-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.loop-step--propose { border-top: 3px solid var(--accent-purple); }
.loop-step--patch { border-top: 3px solid var(--accent-yellow); }
.loop-step--prove { border-top: 3px solid var(--accent-cyan); }
.loop-step--pack { border-top: 3px solid var(--accent-green); }

.loop-step__name {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.loop-step__desc {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.loop-arrow {
  display: flex;
  align-items: center;
  font-size: 1.5rem;
  color: var(--text-muted);
}

/* Proof Ladder */
.proof-ladder {
  margin-top: 32px;
  padding: 24px;
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  text-align: center;
}

.proof-ladder > .mono {
  display: block;
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.15em;
  margin-bottom: 16px;
}

.ladder-steps {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.ladder-step {
  padding: 10px 18px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: all 0.2s ease;
}

.ladder-step:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

.ladder-sep {
  color: var(--accent-cyan);
  font-size: 1rem;
}

/* ============================================
   LESSON SUMMARY
   ============================================ */
.section--summary {
  background: linear-gradient(180deg, var(--bg-surface) 0%, var(--bg-deep) 100%);
  text-align: center;
  padding: 100px 24px;
}

.summary-content {
  max-width: 800px;
  margin: 0 auto;
}

.summary-title {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  margin-bottom: 48px;
}

.summary-points {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 48px;
}

.summary-point {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  padding: 24px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  text-align: left;
}

.summary-point__num {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  background: var(--accent-cyan-dim);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--accent-cyan);
  font-weight: 700;
}

.summary-point p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.summary-point strong {
  color: var(--accent-cyan);
}

.summary-next {
  padding-top: 20px;
}

/* ============================================
   CURRICULUM NAVIGATION
   ============================================ */
.curriculum-nav {
  padding: 48px 24px;
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
}

.curriculum-nav__inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.curriculum-nav__link {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 24px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: all 0.3s ease;
}

.curriculum-nav__link:hover:not(.curriculum-nav__link--disabled) {
  border-color: var(--border-accent);
  background: var(--bg-hover);
}

.curriculum-nav__link--disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.curriculum-nav__link--prev {
  text-align: left;
}

.curriculum-nav__link--next {
  text-align: right;
}

.curriculum-nav__link .mono {
  font-size: 0.7rem;
  color: var(--accent-cyan);
  letter-spacing: 0.1em;
}

.curriculum-nav__title {
  font-size: 1rem;
  color: var(--text-secondary);
}

/* ============================================
   RESPONSIVE ADDITIONS
   ============================================ */
@media (max-width: 1024px) {
  .module-meta {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .insight-core {
    grid-template-columns: 1fr;
  }

  .loop-viz {
    flex-direction: column;
    align-items: center;
  }

  .loop-arrow {
    transform: rotate(90deg);
  }
}

@media (max-width: 768px) {
  .breadcrumb__inner {
    font-size: 0.7rem;
    flex-wrap: wrap;
  }

  .module-title {
    font-size: clamp(2.2rem, 10vw, 3rem);
  }

  .module-premise {
    font-size: 1rem;
  }

  .module-premise strong {
    font-size: 1.1rem;
  }

  .problem-flow {
    flex-direction: column;
  }

  .flow-arrow {
    transform: rotate(90deg);
  }

  .ladder-steps {
    flex-direction: column;
    gap: 8px;
  }

  .ladder-sep {
    transform: rotate(90deg);
  }

  .curriculum-nav__inner {
    grid-template-columns: 1fr;
  }

  .curriculum-nav__link--prev,
  .curriculum-nav__link--next {
    text-align: center;
  }
}

@media (max-width: 480px) {
  .module-intro {
    min-height: auto;
    padding: 60px 16px;
  }

  .module-badge {
    font-size: 0.6rem;
    padding: 6px 12px;
  }

  .module-meta {
    padding: 20px;
  }

  .problem-card {
    padding: 24px;
  }

  .framework-block {
    padding: 24px;
  }

  .insight-phrase h3 {
    font-size: 1.5rem;
  }

  .loop-step {
    min-width: 100%;
  }

  .summary-point {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
}