@import url('https://fonts.googleapis.com/css2?family=Lora:ital,wght@0,400;0,500;0,600;1,400;1,600&family=Outfit:wght@200;300;400;500&family=Syne:wght@400;500;600;700;800&display=swap');

:root {
  /* Primary — warm amber-rust (geological, earthy) */
  --primary: #c2692a;
  --primary-rgb: 194, 105, 42;
  --primary-dark: #8a3f0f;
  --primary-dark-rgb: 138, 63, 15;
  --primary-light: #fde8d8;
  --primary-light-rgb: 253, 232, 216;

  /* Surfaces — deep charcoal with warm undertone */
  --surface-dim: #0f0b08;
  --surface-dim-rgb: 15, 11, 8;
  --surface: #1a1209;
  --surface-rgb: 26, 18, 9;
  --surface-container-low: #221810;
  --surface-container-low-rgb: 34, 24, 16;
  --surface-container: #2c2016;
  --surface-container-rgb: 44, 32, 22;
  --surface-container-high: #382a1e;
  --surface-container-high-rgb: 56, 42, 30;

  /* Text */
  --on-surface: #ede0d4;
  --on-surface-rgb: 237, 224, 212;
  --on-surface-variant: #a88c78;
  --on-surface-variant-rgb: 168, 140, 120;
  --outline-variant: #3d2d1e;
  --outline-variant-rgb: 61, 45, 30;

  /* Accent */
  --accent-amber: #e8a44a;
  --accent-amber-rgb: 232, 164, 74;
  --accent-light: #fdf4ec;
  --accent-light-rgb: 253, 244, 236;

  /* Typography */
  --font-display: 'Syne', sans-serif;
  --font-body: 'Lora', serif;
  --font-meta: 'Outfit', sans-serif;
}

html {
  scroll-behavior: smooth;
  background-color: var(--surface-dim);
  color: var(--on-surface);
  font-family: var(--font-body);
}

body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ─── Typography ───────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--accent-light);
  line-height: 1.1;
  margin-top: 0;
}

p {
  line-height: 1.75;
  font-size: 1.125rem;
  margin-bottom: 1.5rem;
  color: var(--on-surface);
}

a {
  color: var(--primary-light);
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
  transition: color 0.2s;
}

a:hover {
  color: var(--accent-amber);
}

/* ─── Layout ────────────────────────────────────────────────── */
.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
}

.article-container {
  width: 90%;
  max-width: 720px;
  margin: 0 auto;
}

/* ─── Navigation ────────────────────────────────────────────── */
.site-nav {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 50;
  background: rgba(15, 11, 8, 0.88);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--outline-variant);
  padding: 1rem 0;
}

.site-nav .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-brand {
  font-family: var(--font-meta);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 500;
  color: var(--accent-light);
  text-decoration: none;
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-brand span.material-symbols-outlined {
  color: var(--primary);
}

/* ─── Editorial Components ──────────────────────────────────── */
.editorial-deck {
  font-family: var(--font-body);
  font-size: 1.35rem;
  line-height: 1.65;
  color: var(--on-surface-variant);
  margin-bottom: 2rem;
  font-style: italic;
}

.eyebrow {
  font-family: var(--font-meta);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  font-size: 0.8rem;
  color: var(--primary);
  margin-bottom: 0.5rem;
  font-weight: 500;
}

/* ─── Stats Strip ────────────────────────────────────────────── */
.stats-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 2rem;
  padding: 3rem 0;
  border-top: 1px solid var(--outline-variant);
  border-bottom: 1px solid var(--outline-variant);
  margin: 4rem 0;
}

.stat-item {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.stat-number {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.5vw + 0.75rem, 3rem);
  font-weight: 800;
  color: var(--accent-light);
  line-height: 1.1;
  margin-bottom: 0.5rem;
  min-width: 0;
  overflow-wrap: break-word;
}

.stat-number.accent {
  color: var(--primary);
}

.stat-label {
  font-family: var(--font-meta);
  font-size: 0.9rem;
  color: var(--on-surface-variant);
  font-weight: 400;
  line-height: 1.4;
  min-width: 0;
  overflow-wrap: break-word;
}

/* ─── Data Callout ───────────────────────────────────────────── */
.data-callout {
  background: var(--surface-container-low);
  border: 1px solid var(--outline-variant);
  border-radius: 8px;
  padding: 1.5rem;
}

.data-callout .stat-label {
  color: var(--on-surface);
  margin-top: 0.65rem;
  line-height: 1.55;
}

/* ─── Pull Quote ─────────────────────────────────────────────── */
.pull-quote {
  font-family: var(--font-body);
  font-style: italic;
  font-size: 1.45rem;
  line-height: 1.45;
  color: var(--accent-light);
  margin: 2.5rem 0;
  padding: 1.5rem 2rem;
  border-left: 4px solid var(--accent-amber);
  background: linear-gradient(90deg, rgba(232, 164, 74, 0.07) 0%, transparent 100%);
}

.pull-quote cite {
  display: block;
  font-family: var(--font-meta);
  font-style: normal;
  font-size: 0.875rem;
  color: var(--on-surface-variant);
  margin-top: 0.75rem;
}

/* ─── Fact Box ───────────────────────────────────────────────── */
.fact-box {
  background: var(--surface-container-low);
  border: 1px solid var(--outline-variant);
  padding: 1.75rem;
  border-radius: 4px;
  margin: 2rem 0;
}

.fact-box h4 {
  font-family: var(--font-meta);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.85rem;
  color: var(--primary);
  margin-bottom: 1rem;
}

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

.fact-box li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.9rem;
  font-size: 0.95rem;
  color: var(--on-surface);
  line-height: 1.6;
}

.fact-box li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--accent-amber);
  font-weight: bold;
}

/* ─── Historical Pop-out ─────────────────────────────────────── */
.sidebar-pop {
  background: var(--surface-container);
  border: 1px solid var(--outline-variant);
  border-left: 3px solid var(--accent-amber);
  border-radius: 4px;
  padding: 1.75rem;
  margin: 2rem 0;
}

.sidebar-pop .pop-eyebrow {
  font-family: var(--font-meta);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  font-size: 0.72rem;
  color: var(--accent-amber);
  margin-bottom: 0.75rem;
  font-weight: 600;
}

.sidebar-pop h4 {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--accent-light);
  margin-bottom: 1rem;
  line-height: 1.3;
}

.sidebar-pop p {
  font-size: 0.9rem;
  color: var(--on-surface-variant);
  line-height: 1.7;
  margin-bottom: 0.75rem;
}

.sidebar-pop .pop-data {
  font-family: var(--font-meta);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--accent-amber);
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--outline-variant);
  line-height: 1.6;
}

/* ─── Expert Quote ───────────────────────────────────────────── */
.expert-quote {
  background: var(--surface-container-low);
  border-radius: 4px;
  padding: 1.75rem;
  margin: 2rem 0;
  border: 1px solid var(--outline-variant);
}

.expert-quote blockquote {
  font-family: var(--font-body);
  font-style: italic;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--on-surface);
  margin: 0 0 1rem 0;
  padding: 0;
  border: none;
}

.expert-quote blockquote::before {
  content: '\201C';
  font-size: 2.5rem;
  color: var(--primary);
  line-height: 0;
  vertical-align: -0.65rem;
  margin-right: 0.15rem;
}

.expert-quote .quote-author {
  font-family: var(--font-meta);
  font-size: 0.82rem;
  color: var(--on-surface-variant);
}

.expert-quote .quote-author strong {
  display: block;
  color: var(--accent-light);
  font-weight: 600;
  margin-bottom: 0.2rem;
}

/* ─── Rule Divider ───────────────────────────────────────────── */
.rule-divider {
  border: 0;
  height: 1px;
  background: var(--outline-variant);
  margin: 4rem 0;
  width: 100%;
}

/* ─── Chapter Cards ──────────────────────────────────────────── */
.chapter-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
  margin-bottom: 4rem;
}

.chapter-card {
  background: var(--surface);
  border: 1px solid var(--outline-variant);
  border-radius: 8px;
  padding: 2rem;
  text-decoration: none;
  display: flex;
  flex-direction: column;
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  position: relative;
  overflow: hidden;
}

.chapter-card:hover {
  background: var(--surface-container);
  border-color: var(--primary);
  transform: translateY(-4px);
  box-shadow: 0 14px 28px rgba(0, 0, 0, 0.55);
}

.chapter-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent-amber));
  opacity: 0;
  transition: opacity 0.3s;
}

.chapter-card:hover::before {
  opacity: 1;
}

.chapter-card .eyebrow {
  margin-bottom: 1rem;
}

.chapter-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--accent-light);
}

.chapter-card p.card-teaser {
  font-size: 1rem;
  color: var(--on-surface-variant);
  margin-bottom: 2rem;
  flex-grow: 1;
  font-family: var(--font-meta);
  line-height: 1.6;
}

.card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: auto;
  border-top: 1px solid var(--outline-variant);
  padding-top: 1.5rem;
}

.read-link {
  font-family: var(--font-meta);
  font-weight: 600;
  color: var(--accent-amber);
  text-transform: uppercase;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  text-decoration: none;
}

/* ─── Hub Hero ───────────────────────────────────────────────── */
.hub-hero {
  position: relative;
  min-height: 88vh;
  display: flex;
  align-items: center;
  padding-top: 80px;
  background-color: var(--surface-dim);
  overflow: hidden;
}

.hero-image-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.hero-image-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.45;
  -webkit-mask-image: linear-gradient(to bottom, black 50%, transparent 100%);
  mask-image: linear-gradient(to bottom, black 50%, transparent 100%);
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    to right,
    rgba(15, 11, 8, 0.92) 0%,
    rgba(15, 11, 8, 0.45) 60%,
    rgba(15, 11, 8, 0.1) 100%
  );
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 10;
  max-width: 820px;
}

.hero-content h1 {
  font-size: clamp(3rem, 6vw, 5.75rem);
  letter-spacing: -0.025em;
  margin-bottom: 1.5rem;
  color: white;
  line-height: 1.0;
}

/* ─── Tooltip indicator ──────────────────────────────────────── */
span[data-tooltip] {
  cursor: help;
  position: relative;
}

/* ─── Utilities ──────────────────────────────────────────────── */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.my-4rem { margin-top: 4rem; margin-bottom: 4rem; }
.mb-5rem { margin-bottom: 5rem; }
.mt-3rem { margin-top: 3rem; }
.mw-800 { max-width: 800px; }
.text-xl { font-size: 1.2rem; }
.fs-110 { font-size: 1.1rem; }
.m-0 { margin: 0; }

.about-description {
  color: var(--on-surface-variant);
  font-size: 0.95rem;
  line-height: 1.7;
}

.grid-2-col-gap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
}

.text-meta-upper {
  font-family: var(--font-meta);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--primary);
  font-size: 0.85rem;
}

.meta-list-bare {
  list-style: none;
  padding: 0;
  margin: 0;
  font-family: var(--font-meta);
  font-size: 0.95rem;
  color: var(--on-surface-variant);
  line-height: 2;
}

.eyebrow-flex {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--on-surface-variant);
}

/* ─── Footer ─────────────────────────────────────────────────── */
.site-footer {
  padding: 4rem 0;
  border-top: 1px solid var(--outline-variant);
  background: var(--surface-container-low);
  margin-top: auto;
}

.footer-content {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 2rem;
}

.footer-col h4 {
  font-family: var(--font-meta);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--on-surface-variant);
  margin-bottom: 1.5rem;
}

.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
  font-family: var(--font-meta);
  font-size: 0.95rem;
}

.footer-col ul li {
  margin-bottom: 0.75rem;
}

.footer-col ul li a {
  color: var(--on-surface);
  text-decoration: none;
}

.footer-col ul li a:hover {
  color: var(--primary-light);
  text-decoration: underline;
}

.attribution {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-family: var(--font-meta);
  font-size: 0.85rem;
  color: var(--on-surface-variant);
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--outline-variant);
}

/* ─── Lightbox ───────────────────────────────────────────────── */
.lightbox-trigger {
  cursor: zoom-in;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.lightbox-trigger:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.35);
}

.lightbox-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(15, 11, 8, 0.96);
  z-index: 9999;
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.lightbox-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.lightbox-image {
  max-width: 90%;
  max-height: 90%;
  object-fit: contain;
  border-radius: 8px;
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.6);
  transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  transform: scale(0.95);
}

.lightbox-overlay.active .lightbox-image {
  transform: scale(1);
}

.lightbox-close {
  position: absolute;
  top: 2rem;
  right: 2rem;
  color: var(--on-surface);
  background: var(--surface-container);
  border: 1px solid var(--outline-variant);
  border-radius: 50%;
  width: 48px;
  height: 48px;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
  z-index: 10000;
}

.lightbox-close:hover {
  background: var(--primary);
  color: var(--surface-dim);
}

/* ─── Reveal Animation ───────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ─── Responsive ─────────────────────────────────────────────── */
@media (max-width: 768px) {
  .stats-strip {
    grid-template-columns: 1fr 1fr;
    gap: 2rem 1rem;
  }

  .pull-quote {
    margin: 2rem 0;
    padding: 1.25rem;
    font-size: 1.2rem;
  }

  .grid-2-col-gap {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .chapter-grid {
    grid-template-columns: 1fr;
  }
}