:root {
  --bg-canvas: #faf6ef;
  --bg-sand: #efe7d8;
  --bg-surface: #fffdf8;
  --bg-surface-hover: #f5eee1;
  --text-primary: #2b211a;
  --text-muted: #5c4d42;
  --accent-primary: #c2562e;
  --accent-primary-dark: #9e411f;
  --accent-secondary: #6b7a3a;
  --border-subtle: #cfc3b0;
  --border-strong: #2b211a;
  --ease-kinetic: cubic-bezier(0.16, 1, 0.3, 1);
  --font-serif: Georgia, "Times New Roman", Times, serif;
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

*, *::before, *::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.65;
  overflow-wrap: anywhere;
  hyphens: auto;
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  color: var(--text-primary);
  line-height: 1.22;
  margin-top: 0;
  font-weight: 700;
  overflow-wrap: anywhere;
}

h1 {
  font-size: clamp(2rem, 4vw, 3.1rem);
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}

h2 {
  font-size: clamp(1.55rem, 2.8vw, 2.2rem);
  margin-bottom: 0.85rem;
}

h3 {
  font-size: 1.28rem;
  margin-bottom: 0.6rem;
}

p {
  margin-top: 0;
  margin-bottom: 1.1rem;
}

a {
  color: var(--accent-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

a:hover, a:focus-visible {
  color: var(--text-primary);
  background-color: rgba(194, 86, 46, 0.1);
}

img {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: 0;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent-primary);
  color: #fffdf8;
  padding: 0.6rem 1rem;
  z-index: 1000;
  text-decoration: none;
}

.skip-link:focus {
  left: 0.5rem;
  top: 0.5rem;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.prose-measure {
  max-width: 70ch;
  margin-left: auto;
  margin-right: auto;
}

.prose-left {
  max-width: 70ch;
}

/* Header: Static/Relative, Left Brand, Centered Nav Row Below */
.site-header {
  position: relative;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-strong);
}

.header-top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 1.25rem;
  max-width: 1200px;
  margin: 0 auto;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--text-primary);
}

.brand-mark:hover {
  background: transparent;
}

.brand-glyph {
  width: 34px;
  height: 34px;
  background-color: var(--accent-primary);
  border: 1px solid var(--border-strong);
  display: inline-grid;
  place-items: center;
  color: #fffdf8;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.05rem;
}

.brand-text-wrap {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1.1;
}

.brand-sub {
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-secondary);
  font-weight: 600;
}

.header-utility {
  display: flex;
  align-items: center;
  gap: 1.1rem;
  font-size: 0.85rem;
}

.header-utility a {
  color: var(--text-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.header-utility a:hover {
  color: var(--accent-primary);
  border-bottom-color: var(--accent-primary);
  background: transparent;
}

.menu-dots-btn {
  display: none;
  background: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
  width: 40px;
  height: 40px;
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
  border-radius: 0;
  padding: 0;
}

.nav-row {
  border-top: 1px solid var(--border-subtle);
  background-color: var(--bg-canvas);
}

.primary-nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.25rem;
}

.nav-list a {
  display: block;
  padding: 0.7rem 1.05rem;
  color: var(--text-primary);
  text-decoration: none;
  font-size: 0.93rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  border-bottom: 3px solid transparent;
}

.nav-list a:hover,
.nav-list a[aria-current="page"] {
  color: var(--accent-primary);
  border-bottom-color: var(--accent-primary);
  background-color: var(--bg-surface);
}

.mobile-only-links {
  display: none;
}

/* Buttons: Solid Terracotta, Square, 4px Hard Offset Shadow */
.btn {
  display: inline-block;
  background-color: var(--accent-primary);
  color: #fffdf8;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  padding: 0.78rem 1.4rem;
  border: 1px solid var(--border-strong);
  border-radius: 0;
  text-decoration: none;
  cursor: pointer;
  box-shadow: 4px 4px 0 var(--border-strong);
  transition: transform 0.16s var(--ease-kinetic), box-shadow 0.16s var(--ease-kinetic), background-color 0.16s ease;
}

.btn:hover,
.btn:focus-visible {
  background-color: var(--accent-primary-dark);
  color: #fffdf8;
  transform: translate(4px, 4px);
  box-shadow: 0 0 0 var(--border-strong);
}

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

.btn-secondary:hover,
.btn-secondary:focus-visible {
  background-color: var(--bg-sand);
  color: var(--text-primary);
}

/* Section Bands & Diagonal Clip-Path Joins */
.section-band {
  padding: 4.2rem 0;
  position: relative;
}

.band-cream {
  background-color: var(--bg-canvas);
}

.band-sand {
  background-color: var(--bg-sand);
  clip-path: polygon(0 24px, 100% 0, 100% calc(100% - 24px), 0 100%);
  padding: 5.2rem 0;
  margin: -12px 0;
}

.section-kicker {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-secondary);
  border: 1px solid var(--accent-secondary);
  padding: 0.2rem 0.55rem;
  margin-bottom: 0.75rem;
  background-color: var(--bg-surface);
}

.section-header {
  margin-bottom: 2.2rem;
  max-width: 72ch;
}

/* Hero Layout with Fieldwork Photo & Floating 3-Fact Panel */
.hero-section {
  padding: 3rem 0 4rem;
  background-color: var(--bg-canvas);
  border-bottom: 1px solid var(--border-subtle);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 2.2rem;
  align-items: start;
}

.hero-lead {
  font-size: 1.12rem;
  color: var(--text-muted);
  margin-bottom: 1.6rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.75rem;
}

.hero-visual-stack {
  position: relative;
}

.field-photo-frame {
  border: 1px solid var(--border-strong);
  background-color: var(--bg-surface);
  margin: 0;
}

.field-photo-frame img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-bottom: 1px solid var(--border-strong);
}

.field-caption {
  padding: 0.65rem 0.9rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  background-color: var(--bg-surface);
}

.floating-fact-panel {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-strong);
  padding: 1.2rem 1.35rem;
  margin-top: -1.75rem;
  margin-left: 1.5rem;
  position: relative;
  z-index: 2;
}

.floating-fact-title {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--accent-primary);
  font-weight: 700;
  margin-bottom: 0.75rem;
  display: block;
}

.fact-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.75rem;
}

.fact-list li {
  padding-top: 0.65rem;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.9rem;
}

.fact-list li:first-child {
  padding-top: 0;
  border-top: 0;
}

.fact-source {
  display: block;
  font-size: 0.77rem;
  color: var(--accent-secondary);
  font-weight: 600;
  margin-top: 0.2rem;
}

/* Flat Square Research Panels & Discovery Dossiers */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 1.5rem;
}

.dossier-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-strong);
  border-radius: 0;
  box-shadow: none;
  display: flex;
  flex-direction: column;
  transition: background-color 0.2s ease;
}

.dossier-card:hover {
  background-color: var(--bg-surface-hover);
}

.dossier-media {
  margin: 0;
  border-bottom: 1px solid var(--border-strong);
}

.dossier-media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.dossier-strip {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background-color: var(--bg-sand);
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-primary);
}

.dossier-marker {
  color: var(--accent-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.dossier-body {
  padding: 1.25rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.dossier-body p {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.dossier-footer {
  margin-top: auto;
  padding-top: 0.85rem;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.88rem;
  font-weight: 700;
}

/* Split Dossier Row */
.split-dossier {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-strong);
  margin-bottom: 1.75rem;
}

.split-dossier figure {
  margin: 0;
  border-right: 1px solid var(--border-strong);
  display: flex;
  flex-direction: column;
}

.split-dossier figure img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  flex: 1;
}

.split-dossier figcaption {
  padding: 0.6rem 0.9rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-subtle);
  background-color: var(--bg-canvas);
}

.split-content {
  padding: 1.5rem;
}

/* Evidence / Interpretation / Open Questions Accessible Tabs */
.evidence-tabs {
  border: 1px solid var(--border-strong);
  background-color: var(--bg-surface);
  margin: 1.5rem 0;
}

.tab-list {
  display: flex;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--border-strong);
  background-color: var(--bg-sand);
}

.tab-btn {
  background: transparent;
  border: 0;
  border-right: 1px solid var(--border-strong);
  padding: 0.75rem 1.15rem;
  font-family: var(--font-sans);
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-primary);
  cursor: pointer;
  border-radius: 0;
}

.tab-btn[aria-selected="true"] {
  background-color: var(--accent-primary);
  color: #fffdf8;
}

.tab-panel {
  padding: 1.35rem;
}

.tab-panel[hidden] {
  display: none;
}

/* Research Accordions / Disclosures */
.accordion-stack {
  display: grid;
  gap: 0.85rem;
}

.research-disclosure {
  border: 1px solid var(--border-strong);
  background-color: var(--bg-surface);
}

.research-disclosure summary {
  padding: 1rem 1.2rem;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.06rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.research-disclosure summary::-webkit-details-marker {
  display: none;
}

.research-disclosure summary::after {
  content: "+";
  font-family: var(--font-sans);
  font-size: 1.3rem;
  color: var(--accent-primary);
  font-weight: 700;
}

.research-disclosure[open] summary {
  border-bottom: 1px solid var(--border-subtle);
  background-color: var(--bg-sand);
}

.research-disclosure[open] summary::after {
  content: "−";
}

.disclosure-body {
  padding: 1.15rem 1.25rem;
  color: var(--text-muted);
}

/* Data Comparison Tables */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border-strong);
  background-color: var(--bg-surface);
  margin: 1.75rem 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

th, td {
  padding: 0.8rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-subtle);
  vertical-align: top;
}

th {
  background-color: var(--bg-sand);
  font-family: var(--font-serif);
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-strong);
}

/* Subpage Banner */
.page-banner {
  background-color: var(--bg-sand);
  border-bottom: 1px solid var(--border-strong);
  padding: 2.8rem 0;
}

.breadcrumb {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.breadcrumb a {
  color: var(--accent-secondary);
}

/* Forms & Contact Query Tool */
.form-panel {
  border: 1px solid var(--border-strong);
  background-color: var(--bg-surface);
  padding: 1.6rem;
}

.form-row {
  margin-bottom: 1.15rem;
}

.form-row label {
  display: block;
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 0.35rem;
}

.form-row input,
.form-row select,
.form-row textarea {
  width: 100%;
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--border-strong);
  border-radius: 0;
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.95rem;
}

.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
  outline: 2px solid var(--accent-primary);
  outline-offset: 1px;
  background-color: var(--bg-surface);
}

.output-box {
  border: 1px solid var(--border-strong);
  background-color: var(--bg-sand);
  padding: 1.2rem;
  margin-top: 1.25rem;
}

.output-pre {
  white-space: pre-wrap;
  font-family: monospace;
  font-size: 0.88rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  padding: 0.9rem;
  margin: 0.75rem 0;
}

.button-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.status-note {
  font-size: 0.86rem;
  color: var(--accent-secondary);
  font-weight: 700;
  margin-top: 0.6rem;
  min-height: 1.3rem;
}

/* Scroll Reveal */
.reveal-item {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.55s var(--ease-kinetic), transform 0.55s var(--ease-kinetic);
}

.js-ready .reveal-item:not(.reveal-visible) {
  opacity: 0;
  transform: translateY(14px);
}

/* Footer */
.site-footer {
  background-color: #231a14;
  color: #f3ece0;
  border-top: 3px solid var(--accent-primary);
  padding: 3.2rem 0 2.2rem;
  margin-top: 3rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid #4a3b30;
}

.site-footer h3 {
  color: #faf6ef;
  font-size: 1.08rem;
  margin-bottom: 0.75rem;
}

.site-footer p,
.site-footer li {
  color: #d7cab8;
  font-size: 0.88rem;
}

.site-footer a {
  color: #f4b196;
}

.site-footer a:hover {
  color: #fffdf8;
  background-color: rgba(255, 253, 248, 0.1);
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.45rem;
}

.footer-bottom {
  padding-top: 1.4rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.82rem;
  color: #bfb09c;
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
  .hero-grid,
  .split-dossier {
    grid-template-columns: 1fr;
  }
  .split-dossier figure {
    border-right: 0;
    border-bottom: 1px solid var(--border-strong);
  }
  .floating-fact-panel {
    margin-left: 0;
    margin-top: 1rem;
  }
}

@media (max-width: 767px) {
  .header-utility {
    display: none;
  }
  .menu-dots-btn {
    display: inline-grid;
    place-items: center;
  }
  .nav-row {
    display: none;
    border-top: 1px solid var(--border-strong);
    background-color: var(--bg-surface);
  }
  .nav-row.is-open {
    display: block;
  }
  .nav-list {
    flex-direction: column;
    align-items: stretch;
    padding: 0.5rem 0;
  }
  .nav-list a {
    border-bottom: 1px solid var(--border-subtle);
    padding: 0.85rem 0.5rem;
  }
  .mobile-only-links {
    display: block;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .band-sand {
    clip-path: polygon(0 12px, 100% 0, 100% calc(100% - 12px), 0 100%);
  }
}

@media (max-width: 480px) {
  .section-band {
    padding: 3rem 0;
  }
  .btn {
    width: 100%;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce){*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}