/* ═══════════════════════════════════════════════════════════════════════
   NYC TAXI CARTOGRAPHIC ATLAS
   A folded paper map of the city's taxi traffic
   ═══════════════════════════════════════════════════════════════════════ */

:root {
  /* Pure monochrome paper palette */
  --paper: #ffffff;
  --paper-deep: #f5f5f5;
  --paper-shadow: #e0e0e0;
  --paper-fold: #c0c0c0;
  --ink: #000000;
  --ink-soft: #1a1a1a;
  --ink-faded: #555555;
  --ink-ghost: #999999;
  --ink-mark: #000000;

  /* Map elements */
  --water: #f0f0f0;
  --land: #fafafa;

  /* Typography */
  --serif: 'DM Serif Display', 'Times New Roman', Georgia, serif;
  --body: 'Cormorant Garamond', 'Times New Roman', Georgia, serif;
  --mono: 'DM Mono', 'Courier New', monospace;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--body);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.55;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* ─── Paper grain (fine noise overlay) ─────────────────────────────── */
.paper-grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9998;
  opacity: 0.5;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0.05 0 0 0 0 0.05 0 0 0 0 0.05 0 0 0 0.18 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ─── Paper creases — the folded-map lines ─────────────────────────── */
/* Vertical and horizontal crease lines that simulate where the map folds. */
.paper-creases {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9997;
  opacity: 0.65;
  background-image:
    /* Vertical fold lines (3 columns) */
    linear-gradient(90deg, transparent calc(33.333% - 12px), rgba(0,0,0,0.10) calc(33.333% - 1px), rgba(0,0,0,0.18) 33.333%, rgba(0,0,0,0.10) calc(33.333% + 1px), transparent calc(33.333% + 12px)),
    linear-gradient(90deg, transparent calc(66.666% - 12px), rgba(0,0,0,0.10) calc(66.666% - 1px), rgba(0,0,0,0.18) 66.666%, rgba(0,0,0,0.10) calc(66.666% + 1px), transparent calc(66.666% + 12px)),
    /* Horizontal fold line (middle) */
    linear-gradient(0deg, transparent calc(50% - 16px), rgba(0,0,0,0.10) calc(50% - 1px), rgba(0,0,0,0.16) 50%, rgba(0,0,0,0.10) calc(50% + 1px), transparent calc(50% + 16px));
}

/* ─── Paper edge shadow ────────────────────────────────────────────── */
.paper-edge {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9996;
  box-shadow: inset 0 0 80px rgba(0, 0, 0, 0.12);
}

/* ─── Title block ──────────────────────────────────────────────────── */
.title-block {
  max-width: 1280px;
  margin: 0 auto;
  padding: 56px 48px 40px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 40px;
  align-items: center;
  border-bottom: 2px solid var(--ink);
  position: relative;
}

.title-block::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 48px;
  right: 48px;
  height: 1px;
  background: var(--ink);
}

.title-stamp {
  color: var(--ink);
}

.seal {
  width: 100px;
  height: 100px;
  display: block;
}

.title-text {
  text-align: center;
}

.title-pretitle {
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.25em;
  color: var(--ink-faded);
  margin-bottom: 14px;
  display: block;
}

.title-main {
  font-family: var(--serif);
  font-size: clamp(36px, 5.5vw, 64px);
  font-weight: 400;
  line-height: 0.95;
  color: var(--ink);
  letter-spacing: -0.005em;
}

.title-main.accent {
  font-style: italic;
  margin-top: 2px;
}

.title-sub {
  font-family: var(--body);
  font-size: 16px;
  font-style: italic;
  font-weight: 400;
  color: var(--ink-soft);
  margin-top: 14px;
  line-height: 1.4;
}

.title-meta {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  min-width: 160px;
}

.meta-line {
  display: flex;
  justify-content: space-between;
  border-bottom: 0.5px dotted var(--ink-faded);
  padding-bottom: 4px;
  gap: 10px;
}

.meta-key { color: var(--ink-faded); }
.meta-val { color: var(--ink); font-weight: 500; }

/* ─── Graticule (lat/long labels at page edges) ────────────────────── */
.graticule {
  position: fixed;
  display: flex;
  font-family: var(--mono);
  font-size: 9px;
  color: var(--ink-faded);
  letter-spacing: 0.08em;
  z-index: 5;
  pointer-events: none;
}

.graticule.top {
  top: 4px;
  left: 0;
  right: 0;
  justify-content: space-around;
}

.graticule.left {
  top: 0;
  bottom: 0;
  left: 4px;
  flex-direction: column;
  justify-content: space-around;
  writing-mode: vertical-rl;
}

.graticule.right {
  top: 0;
  bottom: 0;
  right: 4px;
  flex-direction: column;
  justify-content: space-around;
  writing-mode: vertical-rl;
}

@media (max-width: 1024px) {
  .graticule { display: none; }
}

/* ─── Sheet tabs ───────────────────────────────────────────────────── */
.sheet-tabs {
  max-width: 1280px;
  margin: 0 auto;
  padding: 24px 48px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 1px solid var(--ink);
  background: var(--paper);
  position: sticky;
  top: 0;
  z-index: 100;
}

.sheet-tab {
  background: transparent;
  border: none;
  cursor: pointer;
  font-family: var(--body);
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 4px;
  color: var(--ink-faded);
  border-bottom: 2px solid transparent;
  margin-bottom: -26px;
  padding-bottom: 24px;
  transition: color 0.15s;
}

.sheet-tab:hover {
  color: var(--ink);
}

.sheet-tab.active {
  color: var(--ink);
  border-bottom: 2px solid var(--ink);
}

.tab-key {
  font-family: var(--serif);
  font-size: 22px;
  font-style: italic;
  font-weight: 400;
}

.tab-name {
  font-family: var(--body);
  font-size: 17px;
  font-style: italic;
  font-weight: 500;
  white-space: nowrap;
}

/* ─── Main content ─────────────────────────────────────────────────── */
main {
  max-width: 1280px;
  margin: 0 auto;
  padding: 36px 48px 60px;
}

.view {
  display: none;
  animation: viewIn 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.view.active { display: block; }

@keyframes viewIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ─── Sheet intro (per non-A view) ─────────────────────────────────── */
.sheet-intro {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0 28px;
  margin-bottom: 36px;
  padding-bottom: 24px;
  border-bottom: 2px solid var(--ink);
  position: relative;
}

.sheet-intro::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0; right: 0;
  height: 1px;
  background: var(--ink);
}

.sheet-letter {
  font-family: var(--serif);
  font-size: 120px;
  font-style: italic;
  line-height: 0.85;
  color: var(--ink);
  grid-row: 1 / 3;
  align-self: center;
}

.sheet-heading {
  font-family: var(--serif);
  font-size: clamp(36px, 4.5vw, 56px);
  font-weight: 400;
  font-style: italic;
  line-height: 0.95;
  color: var(--ink);
}

.sheet-blurb {
  font-family: var(--body);
  font-size: 18px;
  font-style: italic;
  color: var(--ink-soft);
  margin-top: 12px;
  line-height: 1.45;
  max-width: 700px;
}

/* ─── Legend block (Survey Key — top of Sheet A) ──────────────────── */
.legend-block {
  position: relative;
  border: 2px solid var(--ink);
  padding: 26px 32px 30px;
  margin-bottom: 32px;
  background: var(--paper);
  background-image:
    linear-gradient(var(--paper-deep) 1px, transparent 1px),
    linear-gradient(90deg, var(--paper-deep) 1px, transparent 1px);
  background-size: 20px 20px;
  background-position: 0 0;
}

.legend-block::before {
  content: '';
  position: absolute;
  top: 5px; left: 5px; right: 5px; bottom: 5px;
  border: 0.5px solid var(--ink);
  pointer-events: none;
}

.legend-corner {
  position: absolute;
  width: 14px;
  height: 14px;
  border: 2px solid var(--ink);
  background: var(--paper);
}

.legend-corner.tl { top: -8px; left: -8px; border-right: none; border-bottom: none; }
.legend-corner.tr { top: -8px; right: -8px; border-left: none; border-bottom: none; }
.legend-corner.bl { bottom: -8px; left: -8px; border-right: none; border-top: none; }
.legend-corner.br { bottom: -8px; right: -8px; border-left: none; border-top: none; }

.legend-header {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-bottom: 24px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--ink);
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--ink);
  font-weight: 500;
}

.legend-mark {
  font-size: 14px;
  color: var(--ink);
}

.legend-title {
  font-weight: 700;
}

.key-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}

.key-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 8px 0;
  border-right: 0.5px dotted var(--ink-faded);
  padding-right: 24px;
}

.key-item:last-child {
  border-right: none;
  padding-right: 0;
}

.key-symbol {
  font-family: var(--serif);
  font-size: 36px;
  color: var(--ink);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1.5px solid var(--ink);
  border-radius: 50%;
  background: var(--paper);
  flex-shrink: 0;
}

.key-text {
  flex: 1;
  min-width: 0;
}

.key-label {
  font-family: var(--mono);
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-faded);
  margin-bottom: 4px;
}

.key-value {
  font-family: var(--serif);
  font-size: 32px;
  color: var(--ink);
  line-height: 1;
  letter-spacing: -0.01em;
  font-style: italic;
}

/* ─── Map insets (chart panels) ────────────────────────────────────── */
.map-inset {
  background: var(--paper);
  border: 1.5px solid var(--ink);
  margin-bottom: 24px;
  position: relative;
  box-shadow:
    2px 2px 0 var(--paper-shadow),
    4px 4px 0 var(--paper-fold);
}

.map-inset::before {
  content: '';
  position: absolute;
  top: 4px; left: 4px; right: 4px; bottom: 4px;
  border: 0.5px solid var(--ink-faded);
  pointer-events: none;
}

.inset-header {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 22px;
  border-bottom: 1px solid var(--ink);
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  background: var(--paper-deep);
  position: relative;
  z-index: 1;
}

.plate-num {
  background: var(--ink);
  color: var(--paper);
  padding: 4px 10px 3px;
  font-weight: 700;
  letter-spacing: 0.18em;
}

.plate-title {
  flex: 1;
  font-family: var(--body);
  font-size: 16px;
  font-style: italic;
  font-weight: 500;
  color: var(--ink);
  text-transform: none;
  letter-spacing: 0;
}

.inset-body {
  padding: 24px 26px;
  position: relative;
  z-index: 1;
}

.inset-margin {
  border-top: 0.5px dashed var(--ink-faded);
  padding: 10px 22px 14px;
  font-family: var(--body);
  font-size: 13px;
  font-style: italic;
  color: var(--ink-faded);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  position: relative;
  z-index: 1;
}

.margin-note { flex: 1; }

/* Scale bar styling */
.scale-bar {
  display: flex;
  align-items: center;
  gap: 4px;
  font-family: var(--mono);
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink);
}

.bar-line {
  width: 60px;
  height: 6px;
  background: linear-gradient(90deg, var(--ink) 50%, var(--paper) 50%);
  background-size: 12px 6px;
  border: 1px solid var(--ink);
}

.bar-tick { color: var(--ink-faded); }

/* ─── Chart canvas wrapper ─────────────────────────────────────────── */
.chart-canvas-wrap {
  position: relative;
  width: 100%;
  height: 280px;
}
.chart-canvas-wrap.tall { height: 420px; }
.chart-canvas-wrap.short { height: 200px; }
.chart-canvas-wrap.hero { height: 320px; }

.chart-canvas-wrap canvas {
  position: absolute !important;
  top: 0; left: 0;
  width: 100% !important;
  height: 100% !important;
  display: block;
}

/* ─── Layout grids ─────────────────────────────────────────────────── */
.twin-map {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
}

.trio-map {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-bottom: 24px;
}

/* ─── Topographic frame (heatmap container) ────────────────────────── */
.topo-frame {
  border: 1px solid var(--ink);
  padding: 16px;
  background: var(--paper);
  background-image:
    /* Subtle topographic contour suggestion */
    radial-gradient(ellipse at 30% 40%, transparent 60%, rgba(0, 0, 0, 0.05) 70%, transparent 80%),
    radial-gradient(ellipse at 70% 60%, transparent 50%, rgba(0, 0, 0, 0.04) 60%, transparent 75%);
}

#heatmap {
  position: relative;
  width: 100%;
  background: var(--paper);
  border: 1px solid var(--ink);
}

#heatmap canvas {
  display: block;
  cursor: crosshair;
}

.hm-tip {
  position: absolute;
  background: var(--ink);
  color: var(--paper);
  padding: 6px 10px;
  font-family: var(--mono);
  font-size: 10px;
  white-space: nowrap;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s;
  z-index: 20;
}

.legend-strip {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.15em;
  color: var(--ink-faded);
}

.legend-gradient {
  width: 200px;
  height: 10px;
  background: linear-gradient(90deg, var(--paper) 0%, #888888 50%, var(--ink) 100%);
  border: 1px solid var(--ink);
}

/* ─── Sector register (zone table) ─────────────────────────────────── */
#sector-register {
  display: grid;
  grid-template-columns: auto 1fr auto auto auto auto;
  gap: 0;
  border: 1px solid var(--ink);
  background: var(--paper);
}

.sr-h {
  background: #d0d0d0;
  color: var(--ink);
  padding: 12px 14px;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 700;
  border-right: 0.5px solid var(--ink-faded);
  border-bottom: 2px solid var(--ink);
}

.sr-h:last-child { border-right: none; }
.sr-h.right { text-align: right; }

.sr-c {
  padding: 12px 14px;
  border-bottom: 0.5px dashed var(--ink-faded);
  border-right: 0.5px dashed var(--ink-faded);
  color: var(--ink);
  font-family: var(--body);
  font-size: 14px;
}

.sr-c:last-child { border-right: none; }
#sector-register > .sr-c:nth-last-child(-n+6) { border-bottom: none; }

.sr-c.rank {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--ink-faded);
  text-align: center;
  font-weight: 700;
}

.sr-c.zname { font-style: italic; }
.sr-c.right { text-align: right; }
.sr-c.mono {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink);
  font-weight: 500;
}
.sr-c.dim {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-faded);
}

/* ─── Filter strip + ledger table ──────────────────────────────────── */
.filter-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  align-items: flex-end;
  padding: 18px 22px;
  border: 1px solid var(--ink);
  background: var(--paper-deep);
  margin-bottom: 22px;
}

.fld {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 140px;
}

.fld label {
  font-family: var(--mono);
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-faded);
}

.fld select {
  background: transparent;
  border: none;
  border-bottom: 1.5px solid var(--ink);
  color: var(--ink);
  font-family: var(--body);
  font-size: 15px;
  font-style: italic;
  padding: 5px 2px;
  cursor: pointer;
  outline: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'%3E%3Cpath d='M2 4 L6 9 L10 4' stroke='%23000000' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 4px center;
  background-size: 12px;
  padding-right: 20px;
}

.quill-btn {
  background: var(--ink);
  color: var(--paper);
  border: none;
  padding: 10px 22px;
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  cursor: pointer;
  font-weight: 700;
  transition: all 0.15s;
}

.quill-btn:hover {
  background: var(--paper);
  color: var(--ink);
  outline: 2px solid var(--ink);
  outline-offset: -2px;
}

#ledger-table {
  border: 1px solid var(--ink);
  background: var(--paper);
  overflow-x: auto;
}

#ledger-table table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--body);
  font-size: 14px;
}

#ledger-table th {
  background: var(--paper-deep);
  font-family: var(--mono);
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-faded);
  text-align: left;
  padding: 12px 14px;
  border-bottom: 2px solid var(--ink);
  font-weight: 700;
}

#ledger-table td {
  padding: 11px 14px;
  border-bottom: 0.5px dashed var(--ink-faded);
  color: var(--ink);
}

#ledger-table tbody tr:hover { background: var(--paper-deep); }

#ledger-table .mono {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-faded);
}

.ledger-pagination {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 18px;
  padding: 12px 4px;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--ink-faded);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.page-btn {
  background: var(--paper);
  border: 1px solid var(--ink);
  color: var(--ink);
  padding: 7px 16px;
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  cursor: pointer;
  transition: all 0.15s;
}

.page-btn:hover {
  background: var(--ink);
  color: var(--paper);
}

.page-btn:disabled { opacity: 0.3; cursor: not-allowed; }

/* ─── Insights (Marginalia) ────────────────────────────────────────── */
.margin-card {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 36px;
  border: 2px solid var(--ink);
  padding: 32px 36px;
  margin-bottom: 26px;
  background: var(--paper);
  position: relative;
  box-shadow: 2px 2px 0 var(--paper-shadow), 4px 4px 0 var(--paper-fold);
}

.margin-card::before {
  content: '';
  position: absolute;
  top: 5px; left: 5px; right: 5px; bottom: 5px;
  border: 0.5px solid var(--ink-faded);
  pointer-events: none;
}

.margin-numeral {
  font-family: var(--serif);
  font-size: 96px;
  font-style: italic;
  line-height: 0.85;
  color: var(--ink);
  align-self: start;
  position: relative;
  z-index: 1;
}

.margin-content { position: relative; z-index: 1; }

.margin-tag {
  font-family: var(--mono);
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--ink-faded);
  margin-bottom: 6px;
  display: inline-block;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--ink-faded);
}

.margin-title {
  font-family: var(--serif);
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 400;
  font-style: italic;
  line-height: 1.05;
  color: var(--ink);
  margin: 8px 0 18px;
}

.margin-prose {
  font-family: var(--body);
  font-size: 16px;
  font-style: italic;
  color: var(--ink-soft);
  line-height: 1.6;
  margin-bottom: 22px;
  border-left: 2px solid var(--ink);
  padding-left: 16px;
}

.margin-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--body);
  font-size: 14px;
  border: 1px solid var(--ink);
  background: var(--paper);
}

.margin-table thead th {
  background: #d0d0d0;
  color: var(--ink);
  padding: 11px 12px;
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  text-align: left;
  border-right: 0.5px solid var(--ink-faded);
  border-bottom: 2px solid var(--ink);
}

.margin-table thead th:last-child { border-right: none; }

.margin-table tbody td {
  padding: 12px 12px;
  border-bottom: 0.5px dashed var(--ink-faded);
  border-right: 0.5px dashed var(--ink-faded);
  color: var(--ink);
  font-style: italic;
  font-size: 16px;
}

.margin-table tbody td:last-child { border-right: none; }
.margin-table tbody tr:last-child td { border-bottom: none; }

.margin-table tbody td:first-child {
  background: var(--paper-deep);
  font-family: var(--mono);
  font-size: 10px;
  font-style: normal;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink);
  font-weight: 700;
  white-space: nowrap;
}

.margin-table .unit {
  font-family: var(--mono);
  font-size: 9px;
  font-style: normal;
  color: var(--ink-faded);
  margin-left: 4px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.margin-table tr.delta-row td {
  background: #d0d0d0;
  color: var(--ink);
  font-style: normal;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  border-top: 2px solid var(--ink);
}

.margin-table tr.delta-row td:first-child {
  background: #d0d0d0;
  color: var(--ink);
}

/* ─── Map colophon (bottom) ────────────────────────────────────────── */
.map-colophon {
  max-width: 1280px;
  margin: 60px auto 0;
  padding: 28px 48px 50px;
  border-top: 2px solid var(--ink);
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 36px;
  align-items: center;
  position: relative;
}

.map-colophon::before {
  content: '';
  position: absolute;
  top: 6px;
  left: 48px; right: 48px;
  height: 1px;
  background: var(--ink);
}

.scale-master {
  text-align: center;
}

.scale-label {
  font-family: var(--mono);
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--ink-faded);
  margin-bottom: 8px;
}

.scale-graphic {
  display: flex;
  align-items: center;
  gap: 6px;
}

.scale-tick {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink);
  font-weight: 500;
}

.scale-segments {
  display: flex;
  border: 1px solid var(--ink);
}

.seg {
  width: 22px;
  height: 10px;
  background: var(--paper);
  border-right: 1px solid var(--ink);
}

.seg.dark { background: var(--ink); }
.seg:last-child { border-right: none; }

.colophon-text {
  font-family: var(--body);
  font-size: 13px;
  font-style: italic;
  color: var(--ink-faded);
  line-height: 1.55;
  text-align: center;
}

.colophon-text strong {
  color: var(--ink);
  font-style: normal;
  font-family: var(--serif);
  font-size: 14px;
}

.colophon-text p { margin-bottom: 4px; }

.map-mark {
  color: var(--ink);
}

/* ─── Responsive ───────────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .title-block { grid-template-columns: 1fr; gap: 24px; padding: 36px 32px 28px; text-align: center; }
  .title-stamp, .title-meta { justify-self: center; }
  .title-meta { width: 240px; }
  .key-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .key-item:nth-child(2) { border-right: none; padding-right: 0; }
  .twin-map { grid-template-columns: 1fr; }
  .trio-map { grid-template-columns: 1fr; }
  .sheet-tabs { padding: 16px 32px; flex-wrap: wrap; gap: 10px; }
  main { padding: 28px 32px 48px; }
  .map-colophon { padding: 24px 32px 40px; grid-template-columns: 1fr; gap: 24px; text-align: center; }
  .map-colophon > * { justify-self: center; }
  .scale-master, .map-mark { justify-self: center; }
  .margin-card { grid-template-columns: 1fr; gap: 16px; padding: 24px; }
  .margin-numeral { font-size: 64px; }
}

@media (max-width: 640px) {
  .title-block { padding: 24px 18px 20px; }
  .title-main { font-size: 32px; }
  .sheet-tabs { padding: 14px 18px; gap: 6px; overflow-x: auto; flex-wrap: nowrap; }
  .sheet-tab { flex-shrink: 0; }
  .tab-name { font-size: 14px; }
  main { padding: 24px 18px 36px; }
  .legend-block { padding: 20px 18px 22px; }
  .key-grid { grid-template-columns: 1fr; }
  .key-item { border-right: none !important; padding-right: 0 !important; }
  #sector-register { font-size: 12px; }
  .sr-c, .sr-h { padding: 9px 8px; font-size: 11px; }
  .map-colophon { padding: 20px 18px 30px; }
  .inset-header { flex-wrap: wrap; gap: 8px; padding: 12px 16px; }
  .plate-title { font-size: 14px; width: 100%; }
}