/* =============================================================
   Fab City Index 3.0 — Prototype stylesheet
   v0 — M+1 mockup, 2026-06
   Aesthetic: archival ledger / measurement instrument
   ============================================================= */

/* ---------- Tokens ---------- */
:root {
  /* Palette — cream paper, ink, oxidised iron, muted teal */
  --paper: #F5F2EB;
  --paper-2: #EEEAE0;
  --rule: #D8D2C2;
  --rule-soft: #E6E1D1;
  --ink: #0A0A0A;
  --ink-2: #2A2824;
  --ink-3: #5A564E;
  --ink-4: #7A766C;
  --iron: #8B2E1F;        /* accent — reserved for the 37/100 argument */
  --iron-soft: #B8624F;
  --teal: #1F4D4A;        /* DIDO / regenerative signal */
  --teal-soft: #4A7572;
  --amber: #B58730;       /* mock-pill / provisional */

  /* Type */
  --serif: "Source Serif 4", "Source Serif Pro", "GT Sectra", "Tiempos Text", Georgia, serif;
  --sans: "IBM Plex Sans", "Söhne", "Inter Display", -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: "JetBrains Mono", "IBM Plex Mono", "Berkeley Mono", ui-monospace, "SF Mono", Menlo, monospace;

  /* Spacing — using a fractional vertical rhythm */
  --gutter: clamp(1.25rem, 2vw, 2.25rem);
  --col-max: 78rem;
  --read-max: 42rem;

  --t-1: 0.72rem;
  --t-2: 0.82rem;
  --t-3: 0.95rem;
  --t-4: 1.05rem;
  --t-5: 1.28rem;
  --t-6: 1.75rem;
  --t-7: 2.6rem;
  --t-8: 4.5rem;
  --t-9: 8.5rem;
}

/* ---------- Reset / base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.55;
  font-feature-settings: "kern", "liga", "onum";
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
::selection { background: var(--ink); color: var(--paper); }
a { color: inherit; text-decoration: none; border-bottom: 1px solid currentColor; }
a:hover { color: var(--iron); }
a:focus-visible { outline: 2px solid var(--iron); outline-offset: 3px; border-radius: 1px; }
button:focus-visible, [role="button"]:focus-visible, [tabindex]:focus-visible {
  outline: 2px solid var(--iron); outline-offset: 3px; border-radius: 1px;
}
img, svg { max-width: 100%; display: block; }
hr { border: 0; border-top: 1px solid var(--rule); margin: 2.5rem 0; }

/* ---------- Page frame ---------- */
.shell {
  max-width: var(--col-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.shell--narrow { max-width: 58rem; }

/* ---------- Top masthead ---------- */
.masthead {
  border-bottom: 1px solid var(--rule);
  background: var(--paper);
  padding: 0.9rem 0;
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(6px);
  background-color: rgba(245, 242, 235, 0.92);
}
.masthead__row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 2rem;
  align-items: center;
}
.masthead__brand {
  font-family: var(--sans);
  font-size: var(--t-2);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border: 0;
  display: inline-flex;
  align-items: baseline;
  gap: 0.6rem;
}
.masthead__brand-mark {
  font-family: var(--mono);
  font-weight: 600;
  color: var(--iron);
}
.masthead__brand-name { font-weight: 600; color: var(--ink); }
.masthead__brand-version { color: var(--ink-4); }

.masthead__nav { display: flex; gap: 1.4rem; justify-content: center; }
.masthead__nav a {
  font-family: var(--sans);
  font-size: var(--t-2);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
  border: 0;
  padding: 0.25rem 0;
  border-bottom: 1px solid transparent;
}
.masthead__nav a:hover { color: var(--ink); border-bottom-color: var(--ink); }
.masthead__nav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--iron); }

.masthead__meta {
  font-family: var(--mono);
  font-size: var(--t-1);
  color: var(--ink-4);
  letter-spacing: 0.04em;
  text-align: right;
}

/* ---------- Footer ---------- */
.colophon {
  margin-top: 6rem;
  border-top: 1px solid var(--rule);
  padding: 2.5rem 0 3rem;
  font-family: var(--sans);
  font-size: var(--t-2);
  color: var(--ink-3);
}
.colophon__grid {
  display: grid;
  /* fix 2026-06-06: 5 columns — "Related surfaces" group added to the shared footer on every page */
  grid-template-columns: 1.4fr 1fr 1fr 1fr 1fr;
  gap: 2rem;
}
.colophon h4 {
  font-family: var(--sans);
  font-weight: 600;
  font-size: var(--t-1);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink);
  margin: 0 0 0.6rem;
}
.colophon p, .colophon li { margin: 0 0 0.35rem; line-height: 1.5; }
.colophon ul { list-style: none; padding: 0; margin: 0; }
.colophon a { border: 0; color: var(--ink-3); }
.colophon a:hover { color: var(--iron); }
.colophon__lineage {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
  font-size: var(--t-1);
  color: var(--ink-4);
  font-family: var(--mono);
  letter-spacing: 0.02em;
  line-height: 1.7;
}

/* ---------- Typography utilities ---------- */
h1, h2, h3, h4 { font-family: var(--serif); font-weight: 400; line-height: 1.12; color: var(--ink); margin: 0; }
h1 { font-size: var(--t-7); letter-spacing: -0.01em; }
h2 { font-size: var(--t-6); letter-spacing: -0.005em; }
h3 { font-size: var(--t-5); }
h4 { font-size: var(--t-4); font-family: var(--sans); font-weight: 600; letter-spacing: 0.02em; }
p { margin: 0 0 1rem; max-width: 38em; }
.lede { font-size: var(--t-5); line-height: 1.45; color: var(--ink-2); max-width: 34em; }
.kicker {
  font-family: var(--sans);
  font-weight: 600;
  font-size: var(--t-1);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--iron);
  margin-bottom: 0.85rem;
  display: inline-block;
}
.kicker--ink { color: var(--ink-3); }
.kicker--teal { color: var(--teal); }

.mono { font-family: var(--mono); }
.sans { font-family: var(--sans); }
.eyebrow {
  font-family: var(--sans);
  font-weight: 600;
  font-size: var(--t-1);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
}

/* ---------- Mock-pill — the proof-of-honesty element ---------- */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--sans);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 0.18rem 0.5rem;
  border: 1px solid currentColor;
  border-radius: 1px;
  color: var(--ink-3);
  background: transparent;
  vertical-align: middle;
  line-height: 1;
}
.pill::before { content: "·"; font-family: var(--mono); margin-right: 0.1rem; }
.pill--mock { color: var(--amber); border-color: var(--amber); }
.pill--mock::before { content: "*"; }
.pill--live { color: var(--teal); border-color: var(--teal); }
.pill--live::before { content: "●"; font-size: 0.55rem; }
.pill--partial { color: var(--ink-3); border-color: var(--ink-3); }
.pill--partial::before { content: "◐"; }
.pill--gen { color: var(--iron); border-color: var(--iron); }
.pill--gen::before { content: ""; margin: 0; }

/* ---------- Home: monument ---------- */
.monument {
  padding: 6rem 0 3rem;
  border-bottom: 1px solid var(--rule);
}
.monument__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: end;
}
.monument__lhs .kicker { margin-bottom: 1.5rem; }
.monument__hed {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  line-height: 1.05;
  letter-spacing: -0.015em;
  max-width: 14em;
  margin-bottom: 1.5rem;
}
.monument__hed em { font-style: italic; color: var(--ink-2); }
.monument__sub {
  font-family: var(--sans);
  font-size: var(--t-3);
  color: var(--ink-3);
  max-width: 32em;
  line-height: 1.55;
}
.ceiling {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  text-align: right;
  font-family: var(--serif);
  position: relative;
}
.ceiling__num {
  font-size: clamp(7rem, 16vw, 14rem);
  line-height: 0.85;
  font-weight: 400;
  letter-spacing: -0.04em;
  color: var(--iron);
  font-feature-settings: "lnum", "tnum";
}
.ceiling__num sub {
  font-size: 0.18em;
  font-feature-settings: "lnum";
  color: var(--ink-3);
  vertical-align: top;
  margin-left: 0.3em;
  letter-spacing: 0;
}
.ceiling__caption {
  font-family: var(--sans);
  font-size: var(--t-2);
  color: var(--ink-3);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  margin-top: 1rem;
}
.ceiling__witnesses {
  margin-top: 2.5rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  text-align: left;
  width: 100%;
  max-width: 26rem;
  border-top: 1px solid var(--rule);
  padding-top: 1.25rem;
}
.witness__num {
  font-family: var(--serif);
  font-size: var(--t-6);
  color: var(--ink);
  line-height: 1;
  margin-bottom: 0.3rem;
}
.witness__label {
  font-family: var(--sans);
  font-size: var(--t-1);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 0.15rem;
}
.witness__cite {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--ink-4);
  line-height: 1.4;
}

/* ---------- Section: argument ---------- */
.argument {
  padding: 4rem 0 5rem;
  border-bottom: 1px solid var(--rule);
}
.argument__grid {
  display: grid;
  grid-template-columns: 0.4fr 1fr;
  gap: 3rem;
}
.argument__body p {
  font-size: var(--t-4);
  line-height: 1.65;
  color: var(--ink-2);
  max-width: 36em;
}
.argument__body p + p { margin-top: 1rem; }
.argument__body p em { font-style: italic; }
.formula {
  display: inline-block;
  font-family: var(--mono);
  font-size: var(--t-4);
  padding: 0.65rem 0.9rem;
  background: var(--paper-2);
  border: 1px solid var(--rule);
  margin: 0.6rem 0;
  letter-spacing: 0.02em;
}

/* ---------- Card grid (home) ---------- */
.cards {
  padding: 4rem 0 6rem;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-bottom: 1px solid var(--rule);
}
.card {
  padding: 2rem 1.8rem 2.2rem;
  border-right: 1px solid var(--rule);
  display: flex;
  flex-direction: column;
  min-height: 18rem;
  transition: background 0.2s ease;
}
.card:last-child { border-right: 0; }
.card:hover { background: var(--paper-2); }
.card a { border: 0; display: contents; color: inherit; }
.card__num {
  font-family: var(--mono);
  font-size: var(--t-1);
  letter-spacing: 0.08em;
  color: var(--ink-4);
  margin-bottom: 1.6rem;
}
.card__title {
  font-family: var(--serif);
  font-size: var(--t-5);
  line-height: 1.2;
  margin-bottom: 0.6rem;
  color: var(--ink);
}
.card__body {
  font-family: var(--sans);
  font-size: var(--t-2);
  color: var(--ink-3);
  line-height: 1.5;
  margin-bottom: auto;
}
.card__cta {
  margin-top: 1.5rem;
  font-family: var(--sans);
  font-size: var(--t-2);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.card__cta::after { content: "→"; font-family: var(--mono); transition: transform 0.2s ease; }
.card:hover .card__cta::after { transform: translateX(3px); }

/* ---------- Generic page header ---------- */
.page-header {
  padding: 4.5rem 0 3rem;
  border-bottom: 1px solid var(--rule);
}
.page-header__title {
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  letter-spacing: -0.01em;
  margin-bottom: 1rem;
  max-width: 18em;
}
.page-header__deck {
  font-family: var(--sans);
  font-size: var(--t-4);
  color: var(--ink-3);
  max-width: 40em;
  line-height: 1.55;
}
.page-header__meta {
  margin-top: 1.5rem;
  display: flex;
  gap: 1.4rem;
  font-family: var(--mono);
  font-size: var(--t-1);
  color: var(--ink-4);
  letter-spacing: 0.04em;
}

/* =============================================================
   Matrix view
   ============================================================= */
.matrix-section { padding: 3rem 0 5rem; }
.matrix-frame {
  display: grid;
  grid-template-columns: 1fr 22rem;
  gap: 3rem;
  align-items: start;
}
.matrix-key {
  font-family: var(--sans);
  font-size: var(--t-2);
  color: var(--ink-3);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.matrix-key__item { display: inline-flex; align-items: center; gap: 0.4rem; }
.matrix-key__sw {
  width: 0.95rem;
  height: 0.95rem;
  border: 1px solid var(--rule);
  display: inline-block;
}
.sw-pito { background: linear-gradient(90deg, var(--paper-2), var(--iron-soft)); }
.sw-dido { background: linear-gradient(90deg, var(--paper-2), var(--teal-soft)); }
.sw-gen  { background: var(--paper); border: 2px solid var(--iron); }

.matrix {
  display: grid;
  grid-template-columns: 9.5rem repeat(5, 1fr);
  grid-template-rows: auto repeat(4, minmax(7rem, auto));
  border-top: 1px solid var(--ink);
  border-left: 1px solid var(--ink);
}
.matrix__corner {
  border-right: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  background: var(--paper);
  font-family: var(--mono);
  font-size: var(--t-1);
  color: var(--ink-3);
  padding: 0.7rem 0.8rem;
  letter-spacing: 0.04em;
}
.matrix__col-head, .matrix__row-head {
  font-family: var(--sans);
  font-weight: 600;
  font-size: var(--t-2);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink);
  padding: 0.9rem 0.8rem;
  background: var(--paper-2);
  border-right: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}
.matrix__col-head__scale {
  font-family: var(--mono);
  font-weight: 400;
  font-size: 0.65rem;
  display: block;
  color: var(--ink-4);
  margin-top: 0.25rem;
  letter-spacing: 0.06em;
  text-transform: none;
}
.matrix__row-head {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
}
.matrix__row-head__sub {
  font-family: var(--mono);
  font-weight: 400;
  font-size: 0.65rem;
  color: var(--ink-4);
  margin-top: 0.2rem;
  text-transform: none;
  letter-spacing: 0.04em;
}
.matrix__cell {
  position: relative;
  border-right: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  background: var(--paper);
  padding: 0.8rem 0.8rem 0.7rem;
  cursor: pointer;
  text-align: left;
  font: inherit;
  color: inherit;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 7rem;
  transition: background 0.18s ease;
}
.matrix__cell:hover { background: var(--paper-2); }
.matrix__cell:focus-visible { outline: 2px solid var(--iron); outline-offset: -3px; }
.matrix__cell[aria-selected="true"] { background: var(--ink); color: var(--paper); }
.matrix__cell[aria-selected="true"] .matrix__cell-source { color: rgba(245, 242, 235, 0.65); }
.matrix__cell[aria-selected="true"] .matrix__cell-weights { color: rgba(245, 242, 235, 0.85); }

/* Generation 1+2 territory highlight */
.matrix__cell--gen {
  background: var(--paper);
  box-shadow: inset 0 0 0 3px var(--iron);
}
.matrix__cell--gen .matrix__cell-gen-flag {
  position: absolute;
  top: 0; right: 0;
  background: var(--iron);
  color: var(--paper);
  font-family: var(--sans);
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 0.18rem 0.45rem;
}
.matrix__cell-num {
  font-family: var(--serif);
  font-size: var(--t-5);
  line-height: 1;
  margin-bottom: 0.3rem;
  font-feature-settings: "lnum", "tnum";
}
.matrix__cell--gen .matrix__cell-num { color: var(--iron); }
.matrix__cell-source {
  font-family: var(--sans);
  font-size: 0.72rem;
  color: var(--ink-3);
  line-height: 1.3;
}
.matrix__cell-weights {
  font-family: var(--mono);
  font-size: 0.66rem;
  color: var(--ink-4);
  letter-spacing: 0.04em;
  margin-top: 0.4rem;
  display: flex;
  gap: 0.5rem;
}
.matrix__cell-weights span:first-child::before { content: "P "; color: var(--iron); }
.matrix__cell-weights span:last-child::before { content: "D "; color: var(--teal); }
.matrix__cell-bars {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 4px;
  display: flex;
}
.matrix__cell-bars span { display: block; height: 100%; }
.matrix__cell-bars .bar-pito { background: var(--iron-soft); opacity: 0.7; }
.matrix__cell-bars .bar-dido { background: var(--teal-soft); opacity: 0.7; }

/* Detail panel */
.cell-panel {
  position: sticky;
  top: 6rem;
  border: 1px solid var(--ink);
  background: var(--paper);
  padding: 1.6rem 1.5rem;
  min-height: 28rem;
}
.cell-panel__head {
  font-family: var(--mono);
  font-size: var(--t-1);
  letter-spacing: 0.08em;
  color: var(--ink-4);
  margin-bottom: 0.6rem;
  display: flex;
  justify-content: space-between;
}
.cell-panel__title {
  font-family: var(--serif);
  font-size: var(--t-5);
  line-height: 1.15;
  margin-bottom: 1rem;
}
.cell-panel__weights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1rem 0 1.25rem;
  padding: 0.9rem 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.cell-panel__weight-label {
  font-family: var(--sans);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.2rem;
}
.cell-panel__weight-num {
  font-family: var(--serif);
  font-size: var(--t-6);
  line-height: 1;
  font-feature-settings: "lnum";
}
.cell-panel__weight--pito .cell-panel__weight-label,
.cell-panel__weight--pito .cell-panel__weight-num { color: var(--iron); }
.cell-panel__weight--dido .cell-panel__weight-label,
.cell-panel__weight--dido .cell-panel__weight-num { color: var(--teal); }
.cell-panel__field {
  margin-bottom: 0.95rem;
  font-size: var(--t-3);
  line-height: 1.5;
}
.cell-panel__field strong {
  display: block;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 0.2rem;
}
.cell-panel__pills { margin-top: 1rem; display: flex; gap: 0.4rem; flex-wrap: wrap; }
.cell-panel__hint {
  font-family: var(--sans);
  font-size: var(--t-2);
  color: var(--ink-4);
  font-style: italic;
}

/* =============================================================
   Phase plot
   ============================================================= */
.phase-section { padding: 3rem 0 5rem; }
.phase-frame {
  display: grid;
  grid-template-columns: 1fr 20rem;
  gap: 3rem;
  align-items: start;
}
.phase-canvas-wrap {
  position: relative;
  background: var(--paper);
  border: 1px solid var(--ink);
  padding: 2.2rem 2.6rem 2.6rem 2.6rem;
  aspect-ratio: 1 / 1;
}
.phase-canvas-wrap svg { width: 100%; height: 100%; display: block; overflow: visible; }
.phase-axis text {
  font-family: var(--mono);
  font-size: 9px;
  fill: var(--ink-4);
  letter-spacing: 0.06em;
}
.phase-axis-label {
  font-family: var(--sans);
  font-size: 11px;
  fill: var(--ink);
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.phase-gridline { stroke: var(--rule-soft); stroke-width: 1; }
.phase-rule { stroke: var(--ink); stroke-width: 1; }
.phase-point { fill: var(--ink); stroke: var(--paper); stroke-width: 2; }
.phase-point--mock { fill: var(--amber); }
.phase-point--live { fill: var(--teal); }
.phase-label {
  font-family: var(--serif);
  font-size: 14px;
  fill: var(--ink);
}
.phase-meta {
  font-family: var(--mono);
  font-size: 9px;
  fill: var(--ink-4);
  letter-spacing: 0.04em;
}
.phase-arrow { stroke: var(--ink-3); stroke-width: 1.4; fill: none; stroke-dasharray: 3 3; }
.phase-target {
  fill: none; stroke: var(--iron); stroke-width: 1.4;
}
.phase-quadrant {
  font-family: var(--sans);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  fill: var(--ink-4);
}

.phase-legend ul { list-style: none; padding: 0; margin: 0; }
.phase-legend li {
  display: grid;
  grid-template-columns: 1.6rem 1fr auto;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--rule);
  font-family: var(--sans);
  font-size: var(--t-2);
}
.phase-legend li:last-child { border-bottom: 0; }
.phase-legend__dot {
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  background: var(--ink);
  display: inline-block;
}
.phase-legend__dot--mock { background: var(--amber); }
.phase-legend__dot--live { background: var(--teal); }
.phase-legend__name { font-family: var(--serif); font-size: var(--t-3); }
.phase-legend__num { font-family: var(--mono); color: var(--ink-3); font-size: 0.78rem; }
.phase-legend__source {
  grid-column: 2 / 4;
  font-size: 0.74rem;
  color: var(--ink-4);
  margin-top: 0.15rem;
}

/* =============================================================
   City detail
   ============================================================= */
.city-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  padding: 3rem 0 3.5rem;
  border-bottom: 1px solid var(--rule);
}
.city-hero__name {
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  letter-spacing: -0.01em;
  margin-bottom: 0.5rem;
}
.city-hero__co {
  font-family: var(--mono);
  font-size: var(--t-1);
  color: var(--ink-4);
  letter-spacing: 0.06em;
  margin-bottom: 1.5rem;
}
.city-hero__desc {
  font-family: var(--sans);
  font-size: var(--t-3);
  color: var(--ink-2);
  line-height: 1.55;
  max-width: 32em;
}
.scoreboard {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 0;
  border: 1px solid var(--ink);
}
.scoreboard__cell {
  padding: 1.1rem 1.2rem 1.2rem;
  border-right: 1px solid var(--ink);
}
.scoreboard__cell:last-child { border-right: 0; }
.scoreboard__label {
  font-family: var(--sans);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 0.5rem;
}
.scoreboard__num {
  font-family: var(--serif);
  font-size: var(--t-7);
  line-height: 0.9;
  font-feature-settings: "lnum";
  margin-bottom: 0.2rem;
}
.scoreboard__num--pito { color: var(--iron); }
.scoreboard__num--dido { color: var(--teal); }
.scoreboard__sub {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--ink-4);
  letter-spacing: 0.04em;
}

.city-section { padding: 3rem 0 4rem; border-bottom: 1px solid var(--rule); }
.city-section h2 { margin-bottom: 1.5rem; }
.city-cells {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  border-top: 1px solid var(--ink);
  border-left: 1px solid var(--ink);
}
.city-cell {
  border-right: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  padding: 0.95rem 0.95rem 1.05rem;
  background: var(--paper);
  min-height: 7.5rem;
  display: flex;
  flex-direction: column;
}
.city-cell__head {
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.06em;
  color: var(--ink-4);
  margin-bottom: 0.4rem;
  display: flex;
  justify-content: space-between;
}
.city-cell__score {
  font-family: var(--serif);
  font-size: 1.5rem;
  line-height: 1;
  margin-bottom: 0.35rem;
  font-feature-settings: "lnum";
}
.city-cell__source {
  font-family: var(--sans);
  font-size: 0.72rem;
  color: var(--ink-3);
  line-height: 1.35;
  margin-top: auto;
}
.city-cell--empty .city-cell__score { color: var(--ink-4); }
.city-cell .pill { font-size: 0.6rem; padding: 0.12rem 0.35rem; }

.city-pillars-grid {
  display: grid;
  grid-template-columns: 9rem repeat(5, 1fr);
  gap: 0;
}
.city-pillars-grid .city-row-head {
  font-family: var(--sans);
  font-weight: 600;
  font-size: var(--t-2);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 1.1rem 0.9rem;
  border-bottom: 1px solid var(--ink);
  border-left: 1px solid var(--ink);
  background: var(--paper-2);
  display: flex;
  align-items: center;
}

/* =============================================================
   Methodology
   ============================================================= */
.method-section { padding: 3.5rem 0 4rem; border-bottom: 1px solid var(--rule); }
.method-section h2 { margin-bottom: 1rem; }
.method-section p { font-size: var(--t-4); line-height: 1.65; color: var(--ink-2); max-width: 36em; }
.method-formula {
  display: block;
  text-align: center;
  font-family: var(--serif);
  font-size: clamp(2rem, 4vw, 2.8rem);
  padding: 2.5rem 1rem;
  background: var(--paper-2);
  border: 1px solid var(--rule);
  margin: 1.5rem 0 2rem;
  letter-spacing: -0.01em;
}
.method-formula__inline {
  font-family: var(--mono);
  font-size: 0.85em;
  background: var(--paper-2);
  padding: 0.1rem 0.35rem;
  border: 1px solid var(--rule);
}

.weight-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--sans);
  font-size: var(--t-2);
  margin: 1.5rem 0;
}
.weight-table th, .weight-table td {
  padding: 0.65rem 0.8rem;
  border-bottom: 1px solid var(--rule);
  text-align: left;
  vertical-align: top;
}
.weight-table th {
  font-weight: 600;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-3);
  border-bottom: 1px solid var(--ink);
}
.weight-table td.num {
  font-family: var(--mono);
  text-align: right;
  font-size: var(--t-3);
  font-feature-settings: "tnum", "lnum";
}
.weight-table td.num--pito { color: var(--iron); }
.weight-table td.num--dido { color: var(--teal); }
.weight-table tr.is-gen td {
  background: rgba(139, 46, 31, 0.04);
  font-weight: 600;
}
.weight-table tr.is-gen td:first-child::before {
  content: "★ ";
  color: var(--iron);
}
.weight-table td .pill { font-size: 0.6rem; padding: 0.1rem 0.32rem; }

.callout {
  margin: 2rem 0;
  padding: 1.6rem 1.8rem;
  background: var(--paper-2);
  border-left: 3px solid var(--iron);
  font-family: var(--serif);
  font-size: var(--t-3);
  line-height: 1.6;
}
.callout__kicker {
  font-family: var(--sans);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--iron);
  font-weight: 600;
  margin-bottom: 0.5rem;
  display: block;
}
.callout__formula {
  display: block;
  font-family: var(--mono);
  font-size: var(--t-3);
  background: var(--paper);
  border: 1px solid var(--rule);
  padding: 0.7rem 0.9rem;
  margin: 0.75rem 0;
}

.gap-list {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
  counter-reset: gap;
}
.gap-list li {
  counter-increment: gap;
  padding: 1rem 0 1rem 3rem;
  border-bottom: 1px solid var(--rule);
  font-family: var(--sans);
  font-size: var(--t-3);
  line-height: 1.55;
  position: relative;
  color: var(--ink-2);
}
.gap-list li::before {
  content: counter(gap, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1.1rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--iron);
  letter-spacing: 0.04em;
}

/* =============================================================
   Lineage
   ============================================================= */
.lineage-section { padding: 3rem 0 4rem; }
.gen-row {
  display: grid;
  grid-template-columns: 8rem 1fr;
  gap: 2rem;
  padding: 2.5rem 0;
  border-top: 1px solid var(--rule);
}
.gen-row:last-child { border-bottom: 1px solid var(--rule); }
.gen-row__num {
  font-family: var(--serif);
  font-size: var(--t-7);
  line-height: 0.9;
  color: var(--ink-3);
  font-feature-settings: "lnum";
}
.gen-row__num strong { color: var(--ink); font-weight: 400; }
.gen-row--gen3 .gen-row__num strong { color: var(--iron); }
.gen-row__title {
  font-family: var(--serif);
  font-size: var(--t-5);
  margin-bottom: 0.4rem;
  line-height: 1.2;
}
.gen-row__authors {
  font-family: var(--sans);
  font-size: var(--t-2);
  color: var(--ink-3);
  letter-spacing: 0.04em;
  margin-bottom: 1rem;
}
.gen-row__body p {
  font-family: var(--sans);
  font-size: var(--t-3);
  color: var(--ink-2);
  max-width: 38em;
  line-height: 1.55;
}
.gen-row__stats {
  display: grid;
  grid-template-columns: repeat(4, auto);
  gap: 2.5rem;
  margin: 1.25rem 0;
  font-family: var(--mono);
  font-size: var(--t-2);
}
.gen-row__stats div { display: flex; flex-direction: column; }
.gen-row__stats dt {
  font-family: var(--sans);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-4);
  margin-bottom: 0.15rem;
}
.gen-row__stats dd {
  font-family: var(--serif);
  font-size: var(--t-5);
  color: var(--ink);
  margin: 0;
  font-feature-settings: "lnum";
}
.citation {
  font-family: var(--serif);
  font-size: var(--t-3);
  line-height: 1.5;
  color: var(--ink-2);
  padding: 1rem 0 1rem 1.4rem;
  border-left: 1px solid var(--rule);
  margin: 1.25rem 0 0;
  max-width: 44em;
}
.citation strong { font-weight: 600; }
.citation a { color: var(--ink-2); }

.citations-list { list-style: none; padding: 0; margin: 0; }
.citations-list li {
  padding: 1rem 0;
  border-bottom: 1px solid var(--rule);
  font-family: var(--serif);
  font-size: var(--t-3);
  line-height: 1.5;
  color: var(--ink-2);
  text-indent: -1.5rem;
  padding-left: 1.5rem;
}

/* Responsive */
@media (max-width: 900px) {
  .monument__grid,
  .argument__grid,
  .matrix-frame,
  .phase-frame,
  .city-hero { grid-template-columns: 1fr; }
  .cards { grid-template-columns: 1fr 1fr; }
  .card { border-bottom: 1px solid var(--rule); }
  .card:nth-child(2) { border-right: 0; }
  .matrix {
    grid-template-columns: 6.5rem repeat(5, 1fr);
    font-size: 0.9rem;
  }
  .matrix__cell { min-height: 5.5rem; padding: 0.5rem 0.45rem; }
  .matrix__cell-num { font-size: var(--t-4); }
  .matrix__cell-source { font-size: 0.62rem; }
  .matrix__cell-weights { font-size: 0.58rem; }
  .cell-panel { position: static; }
  .city-cells, .city-pillars-grid { grid-template-columns: repeat(2, 1fr); }
  .city-pillars-grid .city-row-head { grid-column: 1 / -1; }
  .ceiling__num { text-align: center; }
  .ceiling { align-items: flex-start; text-align: left; }
  .ceiling__witnesses { max-width: 100%; }
  .colophon__grid { grid-template-columns: 1fr 1fr; }
  .gen-row { grid-template-columns: 1fr; gap: 0.5rem; }
  .gen-row__stats { grid-template-columns: 1fr 1fr; gap: 1rem; }
}
@media (max-width: 600px) {
  .cards { grid-template-columns: 1fr; }
  .card { border-right: 0; }
  .masthead__row { grid-template-columns: 1fr; gap: 0.6rem; }
  .masthead__nav { justify-content: flex-start; flex-wrap: wrap; }
  .masthead__meta { text-align: left; }
  .scoreboard { grid-template-columns: 1fr; }
  .scoreboard__cell { border-right: 0; border-bottom: 1px solid var(--ink); }
  .scoreboard__cell:last-child { border-bottom: 0; }
}

/* ---------- fix 2026-06-06: QA hardening for narrow viewports ---------- */
/* fix 2026-06-06: long unbroken strings (DOIs, portal hostnames) overflowed narrow grid columns at 360px */
.witness__cite, .city-cell__source, .matrix__cell-source { overflow-wrap: break-word; }
/* fix 2026-06-06: formula blocks could force horizontal page scroll at 360px */
.formula, .method-formula { max-width: 100%; overflow-x: auto; }
@media (max-width: 600px) {
  /* fix 2026-06-06: the "Gen 1+2" flag is wider than a matrix cell at phone widths and bled into neighbours;
     the iron inset outline still marks the Generation 1+2 territory */
  .matrix__cell-gen-flag { display: none; }
}
@media (max-width: 900px) {
  /* fix 2026-06-06: scale-header cells are meaningless once the city ledger collapses to 2 columns
     (each cell carries its own pillar·scale code in .city-cell__head) */
  .city-row-head--scale { display: none; }
}