/* Luminous Strata Theme: warm stone, light bands, vertical geological layers */

:root {
  --stone-deep: #3d3429;
  --stone: #5c4d3c;
  --stone-mid: #8b7355;
  --sand: #d4c4a8;
  --cream: #f5f0e8;
  --light-band: #faf6ef;
  --gold: #c8923a;
  --gold-soft: rgba(200, 146, 58, 0.28);
  --gold-glow: rgba(232, 200, 120, 0.45);
  --text: #2a2318;
  --text-dim: #6b5d4a;
  --band-line: rgba(200, 146, 58, 0.22);
  --bg: var(--cream);
  --accent: var(--gold);
  --font-serif: Georgia, 'Times New Roman', serif;
  --font-sans: system-ui, -apple-system, 'Segoe UI', sans-serif;
}

* { box-sizing: border-box; }

body {
  background-color: var(--bg);
  background-image:
    linear-gradient(180deg, var(--light-band) 0%, var(--cream) 18%, var(--sand) 55%, #e8dcc8 100%),
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 47px,
      var(--band-line) 47px,
      var(--band-line) 48px
    ),
    linear-gradient(
      90deg,
      transparent 0%,
      var(--gold-glow) 22%,
      var(--gold-soft) 28%,
      transparent 35%,
      transparent 65%,
      var(--gold-soft) 72%,
      var(--gold-glow) 78%,
      transparent 100%
    );
  background-size: 100% 100%, 100% 100%, 100% 100%;
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.65;
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.wrap {
  max-width: 920px;
  margin: 0 auto;
  padding: 0 1.75rem;
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  color: var(--stone-deep);
  line-height: 1.25;
  font-weight: 600;
  letter-spacing: -0.01em;
}

a {
  color: var(--stone);
  text-decoration: none;
  border-bottom: 1px solid var(--gold-soft);
}

a:hover {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

.site-header {
  padding: 1.25rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--band-line);
  background: rgba(245, 240, 232, 0.94);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--stone-deep);
  border-bottom: none;
}

.brand:hover { color: var(--gold); border-bottom: none; }

.brand img { width: 34px; height: 34px; }

.site-nav {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.site-nav a {
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
  border-bottom: none;
}

.site-nav a:hover { color: var(--gold); }

.site-nav a[aria-current="page"] {
  color: var(--gold);
  border-bottom: 2px solid var(--gold);
}

.page-hero {
  padding: 4rem 0 2rem;
}

.eyebrow {
  color: var(--stone-mid);
  text-transform: uppercase;
  letter-spacing: 0.22em;
  font-size: 0.72rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.page-title {
  font-size: clamp(2.2rem, 5.5vw, 3.4rem);
  margin: 0 0 1rem;
  max-width: 18ch;
}

.page-summary {
  font-size: 1.1rem;
  color: var(--text-dim);
  max-width: 42rem;
}

.strata-intro {
  margin: 2rem 0 1rem;
  font-size: 0.88rem;
  color: var(--text-dim);
  font-style: italic;
}

.luminous-column {
  margin: 2rem 0 4rem;
  border: 1px solid var(--band-line);
  background: linear-gradient(180deg, rgba(250, 246, 239, 0.85) 0%, rgba(232, 220, 200, 0.6) 100%);
  position: relative;
  overflow: hidden;
}

.luminous-column::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    180deg,
    transparent 0%,
    var(--gold-glow) 15%,
    transparent 30%,
    transparent 50%,
    var(--gold-soft) 65%,
    transparent 80%,
    var(--gold-glow) 92%,
    transparent 100%
  );
  opacity: 0.35;
  pointer-events: none;
}

.light-band {
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  margin: 0;
  opacity: 0.6;
}

.strata-list {
  list-style: none;
  padding: 0;
  margin: 0;
  position: relative;
}

.strata-list li {
  display: grid;
  grid-template-columns: 130px 110px 1fr;
  gap: 1rem;
  padding: 1.2rem 1.5rem;
  border-top: 1px solid var(--band-line);
  align-items: start;
}

.strata-list li:first-child { border-top: none; }

.strata-list li:nth-child(odd) {
  background: rgba(250, 246, 239, 0.5);
}

.layer-tag {
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--stone-mid);
  font-weight: 600;
}

.layer-name {
  font-family: var(--font-serif);
  font-size: 1.08rem;
  font-weight: 600;
  color: var(--stone-deep);
}

.layer-read {
  font-size: 0.95rem;
  color: var(--text-dim);
}

.strata-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  padding: 1rem 1.5rem 1.25rem;
  border-top: 1px solid var(--band-line);
  font-size: 0.78rem;
  color: var(--text-dim);
}

.strata-legend span::before {
  content: "◆ ";
  color: var(--gold);
  font-size: 0.65rem;
}

.panel-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  margin: 3rem 0 5rem;
}

.strata-panel {
  padding: 1.5rem;
  border: 1px solid var(--band-line);
  background: rgba(250, 246, 239, 0.75);
  border-top: 3px solid var(--gold);
}

.strata-panel h2 {
  font-size: 1.2rem;
  margin: 0 0 0.75rem;
}

.strata-panel .excerpt {
  padding: 1rem 0;
  margin: 0.5rem 0 1rem;
  border-top: 1px solid var(--band-line);
  border-bottom: 1px solid var(--band-line);
  color: var(--text-dim);
  font-style: italic;
}

.prose { margin-bottom: 5rem; }

.prose h2 {
  font-size: 1.6rem;
  margin: 2.5rem 0 1rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--band-line);
}

.prose p { margin-bottom: 1.25rem; color: var(--text-dim); }

.prose p strong { color: var(--text); }

blockquote {
  margin: 2rem 0;
  padding: 1.25rem 1.5rem;
  border-left: 4px solid var(--gold);
  background: rgba(200, 146, 58, 0.08);
  color: var(--text);
  font-family: var(--font-serif);
  font-style: italic;
}

.method-steps {
  counter-reset: step;
  list-style: none;
  padding: 0;
  margin: 2rem 0 4rem;
}

.method-steps li {
  counter-increment: step;
  padding: 1.25rem 1.25rem 1.25rem 3.5rem;
  border: 1px solid var(--band-line);
  margin-bottom: 0.65rem;
  position: relative;
  background: rgba(250, 246, 239, 0.6);
}

.method-steps li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 1rem;
  top: 1.1rem;
  color: var(--gold);
  font-weight: 700;
  font-family: var(--font-serif);
}

.method-steps h2 {
  font-size: 1.1rem;
  margin: 0 0 0.5rem;
  border: none;
  padding: 0;
}

.method-steps p { margin: 0; color: var(--text-dim); }

.archive-list {
  list-style: none;
  padding: 0;
  margin: 2rem 0 4rem;
}

.archive-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem;
  border: 1px solid var(--band-line);
  margin-bottom: 0.65rem;
  background: rgba(250, 246, 239, 0.65);
}

.archive-info h3 {
  margin: 0 0 0.2rem;
  font-size: 1.05rem;
}

.archive-meta {
  font-size: 0.78rem;
  color: var(--text-dim);
}

.fact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0 2rem;
}

.fact {
  padding: 1rem;
  border: 1px solid var(--band-line);
  background: rgba(250, 246, 239, 0.6);
}

.fact b {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--stone-mid);
  margin-bottom: 0.35rem;
}

.status {
  display: inline-flex;
  padding: 0.35rem 0.65rem;
  border: 1px solid var(--band-line);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.status.live {
  border-color: var(--gold);
  color: var(--gold);
}

.status.pending {
  border-color: var(--stone-mid);
  color: var(--stone-mid);
}

.button {
  display: inline-flex;
  padding: 0.55rem 0.9rem;
  border: 1px solid var(--gold);
  color: var(--stone-deep);
  font-size: 0.85rem;
  background: rgba(200, 146, 58, 0.12);
  font-weight: 600;
  border-bottom: 1px solid var(--gold);
}

.button:hover {
  background: rgba(200, 146, 58, 0.22);
  color: var(--stone-deep);
}

.transcript .speech {
  margin-bottom: 1.5rem;
  padding: 1rem 1.25rem;
  border-left: 3px solid var(--band-line);
}

.transcript .speech.human { border-left-color: var(--gold); }
.transcript .speech.ai { border-left-color: var(--stone-mid); }

.speaker {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin: 0 0 0.5rem;
}

.hidden-origin { background: var(--sand); }

.hidden-origin .notice {
  padding: 1rem;
  border: 1px dashed var(--gold);
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
}

.site-footer {
  margin-top: auto;
  padding: 2.5rem 2rem;
  border-top: 1px solid var(--band-line);
  color: var(--text-dim);
  font-size: 0.75rem;
  background: rgba(232, 220, 200, 0.5);
}

.footer-inner {
  max-width: 920px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-inner a { border-bottom: none; }

.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--gold);
  color: var(--cream);
  padding: 0.75rem 1rem;
  z-index: 100;
  font-weight: 700;
  border-bottom: none;
}

.skip-link:focus { top: 0; }

@media (max-width: 720px) {
  .site-header { flex-direction: column; gap: 1rem; text-align: center; }
  .archive-item { flex-direction: column; align-items: flex-start; }
  .strata-list li {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }
}