/* ==========================================================================
   The Inversion Principle — Design System
   White / greyscale + deep red accents (mirrors practicalrobots.ai cues)
   ========================================================================== */

:root {
  --color-bg-base: #ffffff;
  --color-bg-surface: #fafafa;
  --color-bg-elevated: #f5f5f5;
  --color-bg-dark: #0a0a0a;

  --color-primary: #b91c1c;
  --color-primary-hover: #991b1b;
  --color-primary-light: #fef2f2;
  --color-primary-glow: rgba(185, 28, 28, 0.15);

  --color-text-primary: #0a0a0a;
  --color-text-body: #404040;
  --color-text-muted: #737373;
  --color-text-faint: #a3a3a3;
  --color-text-on-dark: #f5f5f5;

  --color-border: #e5e5e5;
  --color-border-strong: #d4d4d4;

  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;

  --max-width: 1280px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--color-bg-base);
  color: var(--color-text-body);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

*:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

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

/* ===== Layout ===== */

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

@media (min-width: 768px) {
  .container { padding: 0 2rem; }
}

/* ===== Header ===== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  width: 100%;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.site-header-inner {
  display: flex;
  height: 4rem;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-text-primary);
  transition: color 0.2s ease;
}

.brand:hover { color: var(--color-primary); }

.brand-mark {
  width: 2rem;
  height: 2rem;
  border-radius: 0.5rem;
  background: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav a {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  transition: color 0.2s ease;
}
.nav a:hover, .nav a.active { color: var(--color-text-primary); }

.nav .btn-primary { color: white; }

.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: 0.5rem;
}

@media (max-width: 767px) {
  .nav { display: none; }
  .menu-toggle { display: flex; }
  .nav.open {
    display: flex;
    position: absolute;
    top: 4rem;
    left: 0;
    right: 0;
    background: white;
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.5rem 1.5rem 1.5rem;
  }
  .nav.open a {
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--color-border);
  }
  .nav.open .btn-primary {
    margin-top: 0.75rem;
    text-align: center;
  }
}

/* ===== Buttons ===== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.4rem;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  font-family: var(--font-body);
  cursor: pointer;
  transition: all 0.2s ease;
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-primary);
  color: white;
}
.btn-primary:hover { background: var(--color-primary-hover); }

.btn-secondary {
  background: transparent;
  color: var(--color-text-primary);
  border-color: var(--color-border-strong);
}
.btn-secondary:hover { background: var(--color-bg-surface); }

.btn-ghost-dark {
  background: transparent;
  color: #d4d4d4;
  border-color: #404040;
}
.btn-ghost-dark:hover { background: #1a1a1a; color: white; }

.btn .arrow { transition: transform 0.2s ease; }
.btn:hover .arrow { transform: translateX(3px); }

/* ===== Section Patterns ===== */

section { position: relative; }

.section {
  padding: 6rem 0;
}

@media (min-width: 768px) {
  .section { padding: 8rem 0; }
}

.section-surface { background: var(--color-bg-surface); }
.section-dark {
  background: var(--color-bg-dark);
  color: var(--color-text-on-dark);
  overflow: hidden;
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--color-primary);
}

.section-heading {
  margin-top: 0.75rem;
  font-family: var(--font-display);
  font-size: clamp(1.875rem, 4vw, 3rem);
  font-weight: 700;
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.section-heading .muted { color: var(--color-text-muted); }

.section-lede {
  margin-top: 1.25rem;
  max-width: 42rem;
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ===== Hero ===== */

.hero {
  position: relative;
  min-height: 88vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 4rem 0;
}

.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 1px 1px, rgba(0, 0, 0, 0.06) 1px, transparent 0);
  background-size: 32px 32px;
  opacity: 0.45;
  pointer-events: none;
}

.hero-glow {
  position: absolute;
  top: 0;
  right: 0;
  width: 60%;
  height: 100%;
  background: radial-gradient(ellipse 80% 70% at 70% 30%, var(--color-primary), transparent);
  opacity: 0.04;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: center;
}

@media (min-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 4rem;
  }
}

.hero-text { max-width: 38rem; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-bg-surface);
  margin-bottom: 1.75rem;
}

.badge-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--color-primary);
  animation: pulse 2.4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}

.badge-text {
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.025em;
  color: var(--color-text-primary);
}

.hero h1 .accent { color: var(--color-primary); }

.hero-sub {
  margin-top: 1.5rem;
  font-size: 1.125rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  max-width: 32rem;
}

@media (min-width: 640px) {
  .hero-sub { font-size: 1.25rem; }
}

.hero-meta {
  margin-top: 0.5rem;
  font-family: var(--font-display);
  font-size: 0.8rem;
  color: var(--color-text-faint);
}

.hero-actions {
  margin-top: 2.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Hero visual: principal/agent diagram */

.hero-visual {
  position: relative;
  display: none;
}

@media (min-width: 1024px) {
  .hero-visual { display: block; }
}

.diagram-card {
  position: relative;
  background: white;
  border: 1px solid var(--color-border);
  border-radius: 1.25rem;
  padding: 2rem;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05), 0 2px 8px rgba(0, 0, 0, 0.03);
}

.diagram-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 1.25rem;
  border: 2px solid var(--color-primary);
  opacity: 0.15;
  transform: translate(0.75rem, 0.75rem);
  z-index: -1;
}

.diagram-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem;
  border-radius: 0.75rem;
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
}

.diagram-row + .diagram-row { margin-top: 0.75rem; }

.diagram-row.inverted {
  background: linear-gradient(135deg, rgba(185, 28, 28, 0.06), rgba(185, 28, 28, 0.02));
  border-color: rgba(185, 28, 28, 0.25);
}

.diagram-label {
  font-family: var(--font-display);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-text-faint);
}

.diagram-actor {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.diagram-actor strong {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--color-text-primary);
  margin-top: 0.4rem;
}

.diagram-actor .role {
  font-size: 0.7rem;
  color: var(--color-text-muted);
  margin-top: 0.15rem;
}

.actor-icon {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 0.6rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: white;
  border: 1px solid var(--color-border);
  font-weight: 700;
  font-family: var(--font-display);
  color: var(--color-text-primary);
}

.actor-icon.ai { background: var(--color-primary); color: white; border-color: var(--color-primary); }

.diagram-arrow {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  color: var(--color-text-faint);
}

.diagram-arrow::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--color-border-strong);
}

.diagram-arrow span {
  position: relative;
  background: var(--color-bg-surface);
  padding: 0 0.5rem;
  font-family: var(--font-display);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.diagram-row.inverted .diagram-arrow::before { background: var(--color-primary); opacity: 0.4; }
.diagram-row.inverted .diagram-arrow span { background: #fbecec; color: var(--color-primary); }

.diagram-canopy {
  margin-top: 0.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.canopy-box {
  width: 100%;
  text-align: center;
  padding: 0.85rem 1rem;
  border-radius: 0.75rem;
  background: linear-gradient(135deg, rgba(185, 28, 28, 0.10), rgba(185, 28, 28, 0.03));
  border: 1.5px dashed var(--color-primary);
  color: var(--color-text-primary);
}

.canopy-box strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--color-primary);
  margin-top: 0.15rem;
}

.canopy-label {
  font-family: var(--font-display);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-text-faint);
}

.canopy-sub {
  display: block;
  font-size: 0.72rem;
  color: var(--color-text-muted);
  margin-top: 0.2rem;
}

.canopy-drop {
  width: 2px;
  height: 1.1rem;
  background: var(--color-primary);
  opacity: 0.5;
  position: relative;
}

.canopy-drop::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: -1px;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 6px solid var(--color-primary);
  opacity: 1;
}

.diagram-divider {
  text-align: center;
  font-family: var(--font-display);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--color-primary);
  margin: 1rem 0;
  position: relative;
}

.diagram-divider::before, .diagram-divider::after {
  content: '';
  position: absolute;
  top: 50%;
  width: 30%;
  height: 1px;
  background: var(--color-border);
}
.diagram-divider::before { left: 0; }
.diagram-divider::after { right: 0; }

/* ===== Marquee ===== */

.marquee {
  padding: 2rem 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg-surface);
  overflow: hidden;
  position: relative;
  -webkit-mask-image: linear-gradient(to right, transparent, black 120px, black calc(100% - 120px), transparent);
          mask-image: linear-gradient(to right, transparent, black 120px, black calc(100% - 120px), transparent);
}

.marquee-track {
  display: flex;
  width: max-content;
  animation: marquee 50s linear infinite;
  gap: 3rem;
}

.marquee:hover .marquee-track { animation-play-state: paused; }

.marquee-item {
  display: flex;
  align-items: center;
  gap: 2rem;
  white-space: nowrap;
}

.marquee-text {
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--color-text-muted);
}

.marquee-dot {
  width: 0.4rem;
  height: 0.4rem;
  border-radius: 50%;
  background: var(--color-primary);
  flex-shrink: 0;
}

@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ===== Bento Grid ===== */

.bento {
  display: grid;
  grid-template-columns: repeat(1, 1fr);
  gap: 1rem;
  margin-top: 3rem;
}

@media (min-width: 768px) {
  .bento { grid-template-columns: repeat(3, 1fr); }
}

.bento-card {
  position: relative;
  padding: 1.75rem;
  border-radius: 0.875rem;
  border: 1px solid var(--color-border);
  background: white;
  transition: all 0.3s ease;
  overflow: hidden;
}

.bento-card:hover {
  border-color: var(--color-border-strong);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  transform: translateY(-2px);
}

.bento-card.wide { grid-column: span 1; }

@media (min-width: 768px) {
  .bento-card.wide { grid-column: span 2; }
}

.bento-icon {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.6rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
  transition: all 0.2s ease;
}

.bento-card:hover .bento-icon {
  border-color: rgba(185, 28, 28, 0.3);
  color: var(--color-primary);
}

.bento-icon svg { width: 1.25rem; height: 1.25rem; }

.bento-title {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
}

.bento-desc {
  margin-top: 0.625rem;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.bento-tags {
  margin-top: 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 500;
  padding: 0.2rem 0.55rem;
  border-radius: 0.4rem;
  background: var(--color-bg-surface);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}

/* ===== Two-column "shift" comparison ===== */

.compare {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-top: 3rem;
}

@media (min-width: 768px) {
  .compare { grid-template-columns: 1fr 1fr; gap: 2rem; }
}

.compare-card {
  padding: 2rem;
  border-radius: 1rem;
  border: 1px solid var(--color-border);
  background: white;
  position: relative;
}

.compare-card.before {
  background: var(--color-bg-surface);
}

.compare-card.after {
  background: white;
  border-color: rgba(185, 28, 28, 0.3);
  box-shadow: 0 8px 30px rgba(185, 28, 28, 0.06);
}

.compare-card.after::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-primary);
  border-radius: 1rem 1rem 0 0;
}

.compare-label {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  padding: 0.25rem 0.6rem;
  border-radius: 0.3rem;
}

.compare-card.before .compare-label {
  background: var(--color-bg-elevated);
  color: var(--color-text-muted);
}

.compare-card.after .compare-label {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.compare-card h3 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  margin-top: 0.75rem;
  color: var(--color-text-primary);
  letter-spacing: -0.015em;
}

.compare-flow {
  margin-top: 1.5rem;
  padding: 1.25rem;
  border-radius: 0.6rem;
  background: var(--color-bg-base);
  border: 1px solid var(--color-border);
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.85rem;
  color: var(--color-text-body);
  line-height: 1.7;
}

.compare-card.before .compare-flow { background: white; }

.compare-list {
  margin-top: 1.5rem;
  list-style: none;
  padding: 0;
}

.compare-list li {
  display: flex;
  gap: 0.6rem;
  padding: 0.5rem 0;
  font-size: 0.9rem;
  color: var(--color-text-body);
}

.compare-list li::before {
  content: '';
  flex-shrink: 0;
  width: 0.4rem;
  height: 0.4rem;
  border-radius: 50%;
  margin-top: 0.55rem;
  background: var(--color-text-faint);
}

.compare-card.after .compare-list li::before { background: var(--color-primary); }

/* ===== Drudgery / Liberation split ===== */

.split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: stretch;
  margin-top: 3rem;
}

@media (min-width: 900px) {
  .split { grid-template-columns: 1fr auto 1fr; }
}

.split-side {
  padding: 2.25rem;
  border-radius: 1rem;
  background: white;
  border: 1px solid var(--color-border);
}

.split-side h3 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
}

.split-side h3 .accent { color: var(--color-primary); }

.split-side ul {
  margin-top: 1.25rem;
  list-style: none;
}

.split-side li {
  display: flex;
  gap: 0.75rem;
  padding: 0.65rem 0;
  font-size: 0.95rem;
  color: var(--color-text-body);
  border-bottom: 1px dashed var(--color-border);
}
.split-side li:last-child { border-bottom: none; }

.split-side .li-mark {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-primary);
  flex-shrink: 0;
  width: 1.25rem;
}

.split-from .li-mark { color: var(--color-text-faint); }

.split-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.split-arrow svg { width: 2.5rem; height: 2.5rem; }

@media (max-width: 899px) {
  .split-arrow { transform: rotate(90deg); padding: 0.5rem 0; }
}

/* ===== Story cards ===== */

.stories-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-top: 3rem;
}

@media (min-width: 768px) {
  .stories-grid { grid-template-columns: repeat(2, 1fr); }
}

.story-card {
  position: relative;
  padding: 2rem;
  border-radius: 1rem;
  background: white;
  border: 1px solid var(--color-border);
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}

.story-card:hover {
  border-color: rgba(185, 28, 28, 0.3);
  box-shadow: 0 6px 28px rgba(0, 0, 0, 0.06);
  transform: translateY(-2px);
}

.story-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-display);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.story-tag .dot {
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--color-primary);
}

.story-card h3 {
  margin-top: 0.65rem;
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
}

.story-card .protagonist {
  margin-top: 0.4rem;
  font-size: 0.85rem;
  color: var(--color-text-faint);
  font-family: var(--font-display);
}

.story-card .summary {
  margin-top: 1rem;
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  flex: 1;
}

.story-card .read-more {
  margin-top: 1.25rem;
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  text-transform: uppercase;
}

.story-card .read-more .arrow { transition: transform 0.2s ease; }
.story-card:hover .read-more .arrow { transform: translateX(3px); }

/* ===== About / Stats column ===== */

.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: center;
}

@media (min-width: 1024px) {
  .about-grid { grid-template-columns: 1fr 1fr; gap: 5rem; }
}

.about-visual {
  position: relative;
  aspect-ratio: 1 / 1;
  border-radius: 1.25rem;
  background: linear-gradient(135deg, #fafafa, #ffffff);
  border: 1px solid var(--color-border);
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
}

.about-visual::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 1px 1px, rgba(0, 0, 0, 0.04) 1px, transparent 0);
  background-size: 20px 20px;
}

.about-visual::after {
  content: '';
  position: absolute;
  left: -3px;
  top: 2rem;
  bottom: 2rem;
  width: 4px;
  background: var(--color-primary);
  border-radius: 999px;
}

.spectrum {
  position: relative;
  z-index: 1;
}

.spectrum-title {
  font-family: var(--font-display);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-text-faint);
}

.spectrum-bar {
  margin-top: 1rem;
  height: 4px;
  background: linear-gradient(to right, var(--color-text-faint), var(--color-primary));
  border-radius: 999px;
  position: relative;
}

.spectrum-bar .marker {
  position: absolute;
  top: -8px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: white;
  border: 3px solid var(--color-primary);
  transform: translateX(-50%);
}

.spectrum-levels {
  margin-top: 1.75rem;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0.4rem;
}

.spectrum-level {
  text-align: center;
  font-family: var(--font-display);
  font-size: 0.7rem;
  color: var(--color-text-muted);
  padding: 0.4rem 0.2rem;
  border-radius: 0.4rem;
  background: white;
  border: 1px solid var(--color-border);
}

.spectrum-level .num {
  display: block;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 0.15rem;
}

.spectrum-level.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
}
.spectrum-level.active .num { color: white; }

.about-callout {
  position: relative;
  z-index: 1;
  padding: 1.25rem;
  border-radius: 0.75rem;
  background: rgba(185, 28, 28, 0.05);
  border: 1px solid rgba(185, 28, 28, 0.15);
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--color-text-primary);
  line-height: 1.5;
}

.about-callout strong { color: var(--color-primary); }

.stat-row {
  margin-top: 2.5rem;
  display: grid;
  gap: 0.75rem;
}

.stat-card {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.1rem;
  border-radius: 0.75rem;
  background: white;
  border: 1px solid var(--color-border);
  transition: border-color 0.2s ease;
}

.stat-card:hover { border-color: var(--color-border-strong); }

.stat-icon {
  flex-shrink: 0;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.stat-icon svg { width: 1.1rem; height: 1.1rem; }

.stat-body { flex: 1; }

.stat-row-top {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.stat-label {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-text-primary);
}

.stat-value {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.stat-desc {
  margin-top: 0.25rem;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* ===== Timeline ===== */

.timeline {
  margin-top: 3.5rem;
  position: relative;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0.625rem;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}

@media (min-width: 768px) {
  .timeline::before {
    left: 50%;
    transform: translateX(-50%);
  }
}

.timeline-row {
  position: relative;
  padding-left: 2.5rem;
  margin-bottom: 2.5rem;
}

.timeline-row::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.5rem;
  width: 1.25rem;
  height: 1.25rem;
  border-radius: 50%;
  background: white;
  border: 3px solid var(--color-primary);
}

@media (min-width: 768px) {
  .timeline-row {
    width: 50%;
    padding-left: 0;
    padding-right: 3rem;
  }
  .timeline-row::before {
    left: auto;
    right: -0.625rem;
  }
  .timeline-row.right {
    margin-left: 50%;
    padding-right: 0;
    padding-left: 3rem;
  }
  .timeline-row.right::before {
    right: auto;
    left: -0.625rem;
  }
}

.timeline-period {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.timeline-row h3 {
  margin-top: 0.4rem;
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
}

.timeline-row p {
  margin-top: 0.6rem;
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ===== Dark CTA ===== */

.cta {
  position: relative;
  padding: 6rem 0;
  text-align: center;
}

.cta-grid-bg {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 1px 1px, rgba(255, 255, 255, 0.1) 1px, transparent 0);
  background-size: 32px 32px;
  opacity: 0.6;
  pointer-events: none;
}

.cta-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 400px;
  background: radial-gradient(ellipse at center, var(--color-primary-glow), transparent 70%);
  pointer-events: none;
}

.cta-inner {
  position: relative;
  z-index: 2;
  max-width: 38rem;
  margin: 0 auto;
}

.cta h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.5vw, 3rem);
  font-weight: 700;
  color: white;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.cta h2 .accent { color: var(--color-primary); }

.cta p {
  margin-top: 1.5rem;
  font-size: 1.0625rem;
  color: #a3a3a3;
  line-height: 1.65;
}

.cta-actions {
  margin-top: 2.5rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}

/* ===== Footer ===== */

.site-footer {
  background: var(--color-bg-surface);
  border-top: 1px solid var(--color-border);
  padding: 4rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
}

@media (min-width: 768px) {
  .footer-grid { grid-template-columns: 2fr 1fr 1fr; }
}

.footer-tagline {
  margin-top: 0.85rem;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  max-width: 22rem;
  line-height: 1.6;
}

.footer-heading {
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin-bottom: 1rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  transition: color 0.2s ease;
}

.footer-links a:hover { color: var(--color-text-primary); }

.footer-bottom {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
  text-align: center;
  font-size: 0.8rem;
  color: var(--color-text-faint);
}

/* ===== Story / detail page typography ===== */

.page-hero {
  padding: 5rem 0 3rem;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 1px 1px, rgba(0, 0, 0, 0.05) 1px, transparent 0);
  background-size: 32px 32px;
  opacity: 0.4;
  pointer-events: none;
}

.page-hero-inner { position: relative; z-index: 1; max-width: 50rem; }

.page-hero h1 {
  margin-top: 0.75rem;
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 5vw, 3.75rem);
  font-weight: 700;
  color: var(--color-text-primary);
  letter-spacing: -0.025em;
  line-height: 1.05;
}

.page-hero h1 .accent { color: var(--color-primary); }

.page-hero p {
  margin-top: 1.5rem;
  font-size: 1.125rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 40rem;
}

/* Article-style content */

.article {
  max-width: 48rem;
  margin: 0 auto;
}

.article h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--color-text-primary);
  letter-spacing: -0.015em;
  margin-top: 3.5rem;
}

.article h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-top: 2.25rem;
  letter-spacing: -0.01em;
}

.article p {
  margin-top: 1.25rem;
  font-size: 1.0625rem;
  color: var(--color-text-body);
  line-height: 1.75;
}

.article ul {
  margin-top: 1.25rem;
  padding-left: 1.5rem;
  color: var(--color-text-body);
  line-height: 1.75;
}

.article ul li { margin: 0.4rem 0; }

.article blockquote {
  margin-top: 2rem;
  padding: 1.5rem 1.75rem;
  border-left: 4px solid var(--color-primary);
  background: var(--color-primary-light);
  border-radius: 0 0.5rem 0.5rem 0;
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--color-text-primary);
  line-height: 1.6;
}

.article blockquote cite {
  display: block;
  margin-top: 0.75rem;
  font-style: normal;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-family: var(--font-body);
}

.callout-box {
  margin-top: 2rem;
  padding: 1.5rem 1.75rem;
  border-radius: 0.75rem;
  background: white;
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--color-primary);
}

.callout-box h4 {
  font-family: var(--font-display);
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 0.6rem;
}

/* Glossary */

.glossary-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-top: 3rem;
}

@media (min-width: 768px) { .glossary-grid { grid-template-columns: 1fr 1fr; } }

.glossary-card {
  padding: 1.5rem;
  border-radius: 0.75rem;
  background: white;
  border: 1px solid var(--color-border);
  transition: border-color 0.2s ease;
}

.glossary-card:hover { border-color: var(--color-border-strong); }

.glossary-card h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text-primary);
  letter-spacing: -0.005em;
}

.glossary-card p {
  margin-top: 0.5rem;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

.glossary-section {
  margin-top: 3rem;
}

.glossary-section h2 {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-primary);
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--color-border);
}

/* Animations */

.fade-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s cubic-bezier(0.25, 0.4, 0.25, 1), transform 0.7s cubic-bezier(0.25, 0.4, 0.25, 1);
}

.fade-up.in { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  .fade-up { opacity: 1; transform: none; transition: none; }
  .marquee-track, .badge-dot { animation: none !important; }
}