@font-face {
  font-family: 'Geist';
  src: url('https://musechain.io/fonts/geist/geist-latin-wght-normal.woff2') format('woff2');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

:root {
  --paper-bg: #f5f2e9;
  --paper-card: #ece7da;
  --paper-line: #d6ceb8;
  --ink-primary: #17212b;
  --ink-muted: #4e5d6c;
  --ink-blue: #1c3b57;
  --ink-accent: #0b2545;
  --red-seal: #b8332a;
  --brass: #8f7438;
  --font-main: 'Geist', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-serif: 'Georgia', 'Times New Roman', serif;
}

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

body {
  background-color: var(--paper-bg);
  color: var(--ink-primary);
  font-family: var(--font-main);
  line-height: 1.6;
  font-size: 16px;
  position: relative;
  min-height: 100vh;
}

/* Background subtle paper texture feeling */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 10% 20%, rgba(255,255,255,0.4) 0%, transparent 60%),
              radial-gradient(circle at 90% 80%, rgba(214, 206, 184, 0.25) 0%, transparent 70%);
  pointer-events: none;
  z-index: -1;
}

/* Lighthouse Rail */
.beacon-rail {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 28px;
  background-color: var(--ink-accent);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 18px;
  z-index: 100;
  border-right: 1px solid rgba(255,255,255,0.1);
}

.beacon-indicator {
  width: 10px;
  height: 10px;
  background-color: #ffd000;
  border-radius: 50%;
  box-shadow: 0 0 8px 3px rgba(255, 208, 0, 0.7);
  animation: pulse-beacon 3s infinite ease-in-out;
}

@keyframes pulse-beacon {
  0%, 100% { opacity: 0.4; transform: scale(0.9); }
  50% { opacity: 1; transform: scale(1.2); box-shadow: 0 0 12px 5px rgba(255, 208, 0, 0.9); }
}

.beacon-label {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  color: #8faec9;
  font-size: 9px;
  letter-spacing: 2px;
  margin-top: 24px;
  text-transform: uppercase;
}

/* Layout container */
.container {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 24px 60px 48px;
}

.text-column {
  max-width: 820px;
}

/* Masthead */
.masthead {
  max-width: 1040px;
  margin: 0 auto;
  padding: 40px 24px 24px 48px;
  border-bottom: 2px solid var(--paper-line);
}

.meta-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  font-size: 11px;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 12px;
}

.red-check {
  color: var(--red-seal);
  font-weight: 900;
  margin-right: 4px;
}

.status-tag {
  color: var(--ink-blue);
  font-weight: 600;
}

h1 {
  font-size: 2.6rem;
  letter-spacing: -0.5px;
  font-weight: 800;
  color: var(--ink-accent);
  line-height: 1.15;
}

.subtitle {
  font-size: 1.15rem;
  color: var(--ink-muted);
  max-width: 720px;
  margin-top: 8px;
  font-family: var(--font-serif);
}

/* Navigation */
.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}

.nav-links a {
  text-decoration: none;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-blue);
  background: var(--paper-card);
  padding: 8px 14px;
  border: 1px solid var(--paper-line);
  border-radius: 3px;
  transition: all 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
  background: var(--ink-blue);
  color: #ffffff;
  border-color: var(--ink-blue);
}

/* Plate Hero Image */
.plate-hero {
  margin: 32px 0 40px;
  border: 1px solid var(--paper-line);
  background-color: #fff;
  padding: 16px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.04);
}

.plate-frame {
  width: 100%;
  background-color: var(--ink-accent);
  overflow: hidden;
  border: 1px solid #111;
}

.hero-img {
  width: 100%;
  height: auto;
  display: block;
  opacity: 0.96;
}

.plate-caption {
  margin-top: 14px;
  padding-top: 10px;
  border-top: 1px dashed var(--paper-line);
  font-size: 13px;
  color: var(--ink-muted);
  display: flex;
  gap: 12px;
  align-items: baseline;
}

.plate-no {
  font-weight: 800;
  color: var(--red-seal);
  letter-spacing: 1px;
  font-size: 12px;
}

/* Intro & Essay */
.intro-block {
  margin-bottom: 36px;
}

.intro-block h2,
.essay h2,
.comparative-bench h2,
.sentinel-exercise h2 {
  font-size: 1.5rem;
  color: var(--ink-accent);
  margin-bottom: 12px;
  border-bottom: 1px solid var(--paper-line);
  padding-bottom: 6px;
}

.intro-block p,
.essay p {
  font-size: 16px;
  margin-bottom: 14px;
  color: var(--ink-primary);
}

.essay h3 {
  margin-top: 20px;
  margin-bottom: 6px;
  font-size: 1.15rem;
  color: var(--ink-blue);
}

.quote-plate {
  margin: 28px 0;
  padding: 20px 24px;
  background-color: #fffcf4;
  border-left: 4px solid var(--red-seal);
  border-top: 1px solid var(--paper-line);
  border-right: 1px solid var(--paper-line);
  border-bottom: 1px solid var(--paper-line);
}

.quote-plate blockquote {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-style: italic;
  color: var(--ink-accent);
  line-height: 1.4;
}

.quote-plate cite {
  display: block;
  margin-top: 10px;
  font-size: 12px;
  font-style: normal;
  color: var(--ink-muted);
  letter-spacing: 0.5px;
}

/* Taxonomy Grid */
.taxonomy-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  margin: 24px 0;
}

.taxonomy-item {
  background: #ffffff;
  padding: 16px;
  border: 1px solid var(--paper-line);
  border-radius: 3px;
}

.taxonomy-item h3 {
  color: var(--ink-blue);
  font-size: 1rem;
  margin-bottom: 8px;
}

.taxonomy-item p {
  font-size: 13.5px;
  color: var(--ink-muted);
  line-height: 1.5;
  margin: 0;
}

/* Sorter Station */
.sorter-station {
  margin-top: 32px;
  background-color: #ffffff;
  border: 1px solid var(--paper-line);
  padding: 20px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.03);
}

.sorter-header {
  border-bottom: 1px solid var(--paper-line);
  padding-bottom: 14px;
  margin-bottom: 20px;
}

.sorter-title {
  font-size: 14px;
  letter-spacing: 0.5px;
  color: var(--ink-accent);
  margin-bottom: 12px;
}

.sorter-title .subtext {
  color: var(--ink-muted);
  font-weight: normal;
}

.filter-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.filter-btn {
  background: var(--paper-card);
  border: 1px solid var(--paper-line);
  padding: 6px 12px;
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-primary);
  cursor: pointer;
  border-radius: 2px;
  transition: all 0.15s ease;
}

.filter-btn:hover {
  border-color: var(--ink-accent);
}

.filter-btn.active {
  background: var(--red-seal);
  color: #ffffff;
  border-color: var(--red-seal);
}

/* Cases Grid */
.cases-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.case-card {
  background-color: #faf8f2;
  border: 1px solid var(--paper-line);
  border-left: 3px solid var(--ink-blue);
  padding: 16px;
  transition: transform 0.15s ease;
}

.case-card.hidden {
  display: none;
}

.case-top {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 8px;
}

.case-id {
  font-size: 11px;
  font-weight: 700;
  color: var(--red-seal);
  letter-spacing: 0.5px;
}

.case-phrase {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--ink-accent);
}

.case-tag {
  font-size: 10px;
  padding: 2px 6px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  border-radius: 2px;
  margin-left: auto;
  font-weight: 600;
  background: var(--paper-line);
  color: var(--ink-accent);
}

.case-desc {
  font-size: 13.5px;
  color: var(--ink-muted);
  margin-bottom: 12px;
}

.reading-box {
  background-color: #ffffff;
  border: 1px solid #e2dac9;
  padding: 10px 14px;
  font-size: 13px;
  line-height: 1.5;
}

.reading-row {
  margin-bottom: 6px;
}

.annotation {
  color: var(--ink-blue);
  font-size: 11px;
  letter-spacing: 0.5px;
  display: inline-block;
  min-width: 140px;
}

.reading-verdict {
  margin-top: 8px;
  padding-top: 6px;
  border-top: 1px dashed var(--paper-line);
  font-size: 12px;
  color: var(--ink-accent);
}

/* Ledger Summary Box */
.ledger-summary {
  margin-top: 40px;
}

.ledger-box {
  background: #fdfbf7;
  border: 2px solid var(--brass);
  padding: 24px;
  position: relative;
}

.ledger-box h3 {
  font-size: 13px;
  color: var(--brass);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.ledger-box p {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-style: italic;
  color: var(--ink-accent);
  line-height: 1.5;
}

/* Glossary Cards */
.glossary-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 20px;
  margin-top: 24px;
}

.glossary-card {
  background: #ffffff;
  border: 1px solid var(--paper-line);
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-