/* ============================================================================
   THE ACTUARY — one stylesheet for the whole record · "CONTROL LIMITS"
   ----------------------------------------------------------------------------
   Linked by both halves of the site: the Askama-rendered record pages
   (/watchtower, /methodology, /incidents, /models/…) and the hand-written
   pages built through Vite. One file, one source of truth.

   IDENTITY — the inspection bureau. Wald's sequential test was built at the
   Statistical Research Group for acceptance inspection; these pages are set on
   that paper. Four laws, shared with landing.css:

     1. PRINTED vs TYPED. The bureau prints the form — Public Sans labels,
        Oswald form mastheads. The instrument types the values — IBM Plex
        Mono for every measured number, id, hash and state word.
     2. THE LABELED LIMIT. Thresholds are red rules labeled before the data
        arrived. Red appears nowhere else; no green anywhere — the record
        reports "no alarm", it never paints health.
     3. SATURATION IS SPENT ON DATA. Okabe-Ito for series, ISO semantics for
        state, carbon ink for chrome. Links are citations → evidence blue.
     4. FLAT INK. Radius 0, no soft shadows, structure from rules and zone
        washes on the 8pt module. Dense where data is dense, airy in prose.

   CONSTRAINTS: CSP style-src 'self' (no inline styles), every page readable
   with scripting disabled, reduced motion respected, focus always visible,
   AA contrast, 320 px floor.
   ========================================================================= */

/* ---- 1 · fonts ------------------------------------------------------------ */
@font-face {
  font-family: 'Oswald';
  src: url('/static/fonts/oswald-latin-wght-normal.woff2') format('woff2');
  font-weight: 200 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Public Sans';
  src: url('/static/fonts/public-sans-latin-wght-normal.woff2') format('woff2');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'IBM Plex Mono';
  src: url('/static/fonts/ibm-plex-mono-latin-400-normal.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'IBM Plex Mono';
  src: url('/static/fonts/ibm-plex-mono-latin-600-normal.woff2') format('woff2');
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

/* ---- 2 · tokens ----------------------------------------------------------- */
:root {
  color-scheme: light;

  --bond: #f8f8f5;
  --plate: #fdfdfb;
  --sunk: #efefe9;
  --carbon: #1b1d1c;
  --carbon-press: #0e100f;
  --carbon-2: #575c59;
  --carbon-3: #6d726e;

  --rule: rgba(27, 29, 28, 0.16);
  --rule-strong: rgba(27, 29, 28, 0.38);
  --rule-faint: rgba(27, 29, 28, 0.09);
  --zone: rgba(27, 29, 28, 0.035);
  --zone-2: rgba(27, 29, 28, 0.07);

  --evidence: #0072b2;
  --evidence-deep: #005a8e;
  --evidence-wash: #e9f1f7;
  --limit: #a82c1b;
  --limit-wash: #f7eae7;
  --watch: #b87a00;
  --watch-ink: #7a5200;
  --no-data: #d6d2c4;

  --font-masthead: 'Oswald', 'Arial Narrow', sans-serif;
  --font-form: 'Public Sans', 'Helvetica Neue', sans-serif;
  --font-typed: 'IBM Plex Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  --u: 8px;
  --u2: 16px;
  --u3: 24px;
  --u4: 32px;
  --u5: 40px;
  --u6: 48px;
  --u8: 64px;
  --u10: 80px;
  --u12: 96px;

  --page-w: 1160px;
  --radius: 0px;

  --dur: 120ms;
  --slow: 640ms;
  --ease: cubic-bezier(0.3, 0.7, 0, 1);
}

/* ---- 3 · reset and base --------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
}
html {
  scroll-behavior: smooth;
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}
body {
  background: var(--bond);
  color: var(--carbon);
  font-family: var(--font-form);
  font-size: 1rem;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img,
svg,
canvas {
  max-width: 100%;
}
a {
  color: var(--evidence);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
  transition: color var(--dur) var(--ease);
}
a:hover {
  color: var(--evidence-deep);
}
:focus-visible {
  outline: 2px solid var(--carbon);
  outline-offset: 2px;
}
code {
  font-family: var(--font-typed);
  font-size: 0.875em;
  background: var(--sunk);
  padding: 1px 5px;
}
.page {
  max-width: var(--page-w);
  margin-inline: auto;
  padding-inline: var(--u3);
}
.page-narrow {
  max-width: 58rem;
  margin-inline: auto;
  padding-inline: var(--u3);
}
.num,
.sym {
  font-family: var(--font-typed);
  font-variant-numeric: tabular-nums;
}
/* α and friends must never be uppercased into Α by a label transform */
.sym {
  text-transform: none;
}
.sr {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}
.skip {
  position: absolute;
  left: -100vw;
  top: 0;
  background: var(--carbon);
  color: var(--bond);
  padding: 10px 16px;
  font: 600 0.875rem var(--font-form);
  z-index: 60;
}
.skip:focus {
  left: 0;
}

/* ---- 4 · type voices ------------------------------------------------------ */
h1,
h2,
h3,
h4 {
  text-wrap: balance;
}
h1 {
  font-family: var(--font-masthead);
  font-weight: 600;
  font-size: clamp(2.125rem, 4.4vw, 3.25rem);
  line-height: 1.04;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  max-width: 22ch;
}
h2 {
  font-family: var(--font-form);
  font-weight: 780;
  font-size: clamp(1.375rem, 2.6vw, 1.8125rem);
  line-height: 1.15;
  letter-spacing: -0.015em;
  max-width: 30ch;
}
h3 {
  font-family: var(--font-form);
  font-weight: 700;
  font-size: 1.0625rem;
  letter-spacing: -0.005em;
}
h4 {
  font-family: var(--font-form);
  font-weight: 700;
  font-size: 0.9375rem;
}
.lede {
  font-size: 1.125rem;
  line-height: 1.6;
  color: var(--carbon-2);
  max-width: 58ch;
}
.lede strong {
  color: var(--carbon);
}
/* one label treatment sitewide: typed, engraved */
.eyebrow {
  font-family: var(--font-typed);
  font-weight: 600;
  font-size: 0.65625rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--carbon-2);
  margin-bottom: 6px;
}
.label {
  font: 600 0.71875rem var(--font-form);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--carbon-2);
}
.caption {
  font-size: 0.8125rem;
  color: var(--carbon-2);
  line-height: 1.6;
  max-width: 62ch;
}
.caption-wide {
  max-width: 82ch;
}
.tag {
  font-family: var(--font-typed);
  font-weight: 600;
  font-size: 0.625rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--carbon-2);
}
.synthetic {
  font-family: var(--font-typed);
  font-size: 0.65625rem;
  letter-spacing: 0.1em;
  color: var(--carbon-2);
}
.mono-label {
  font-family: var(--font-typed);
  font-weight: 600;
  font-size: 0.65625rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--carbon-2);
}

/* ---- 5 · buttons and rows ------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font: 600 0.9375rem var(--font-form);
  padding: 12px 22px;
  border: 0;
  border-radius: var(--radius);
  cursor: pointer;
  text-decoration: none;
  transition:
    background var(--dur) var(--ease),
    color var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}
.btn:active {
  transform: translateY(1px);
}
.btn[disabled] {
  opacity: 0.45;
  cursor: not-allowed;
}
.btn-primary {
  background: var(--carbon);
  color: var(--bond);
}
.btn-primary:hover {
  background: var(--carbon-press);
  color: var(--bond);
}
.btn-ghost {
  background: transparent;
  color: var(--carbon);
  box-shadow: inset 0 0 0 1px var(--carbon);
}
.btn-ghost:hover {
  background: var(--zone);
  color: var(--carbon);
}
.button-link {
  font: inherit;
  color: var(--evidence);
  background: none;
  border: 0;
  padding: 0;
  text-decoration: underline;
  cursor: pointer;
}
.row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

/* ---- 6 · masthead --------------------------------------------------------- */
.masthead {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--bond);
  border-bottom: 1px solid var(--carbon);
}
.masthead-in {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--u3);
  padding-block: 10px;
  min-height: 56px;
}
.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-masthead);
  font-weight: 500;
  font-size: 1rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--carbon);
  text-decoration: none;
}
.wordmark .mark,
.mark {
  width: 24px;
  height: 22px;
  flex: none;
}
/* the mark is the thesis: a labeled limit, and the trace that leaves it */
.mark .m-floor {
  stroke: var(--carbon);
  stroke-opacity: 0.55;
  stroke-dasharray: 3 2.6;
}
.mark .m-base {
  stroke: var(--carbon);
  stroke-width: 1.4;
}
.mark .m-trace {
  stroke: var(--evidence);
  stroke-width: 1.7;
}
.masthead nav {
  display: flex;
  align-items: center;
  gap: var(--u3);
}
.masthead nav a {
  font: 500 0.875rem var(--font-form);
  color: var(--carbon-2);
  text-decoration: none;
}
.masthead nav a:hover {
  color: var(--carbon);
}
.masthead nav a[aria-current='page'] {
  color: var(--carbon);
  font-weight: 700;
}
.masthead .btn {
  padding: 8px 16px;
  font-size: 0.875rem;
}

/* ---- 7 · bands and the form rail ------------------------------------------
   Static pages: .band > .page.rail — the rail-mark prints the form bar.
   Askama pages: sections inside one .page; section-heading carries the
   printed heading. The old night register is retired: every band is bond. */
.band {
  padding-block: var(--u8);
}
.band-tight {
  padding-block: var(--u6);
}
.night {
  background: var(--bond);
  color: var(--carbon);
}
.hero-band {
  padding-block: var(--u6) var(--u5);
}
/* inside a bordered hero band the hero carries no second rule of its own */
.hero-band .hero {
  border-bottom: 0;
  margin-bottom: 0;
  padding-block: 0;
}
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: var(--u3) var(--u6);
  align-items: start;
}
.hero-lead .eyebrow {
  margin-bottom: 10px;
}
.hero-aside {
  padding-top: 6px;
}
.hero-cta {
  margin-top: var(--u3);
}
.rail {
  display: block;
}
.rail-mark {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--font-masthead);
  font-weight: 500;
  font-size: 0.78125rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--carbon);
  border-top: 2px solid var(--carbon);
  padding-top: 10px;
  margin-bottom: var(--u4);
}
.rail-mark .idx::before {
  content: 'Form ACT-';
}
.rail-mark .idx::after {
  content: ' ·';
  color: var(--carbon-3);
}
.rail-body > h2:first-child,
.rail-body > .section-heading:first-child {
  margin-top: 0;
}
/* the rail bar already rules the section: a first block draws no second rule */
.rail-body > .tiers:first-child,
.rail-body > .ledger:first-child {
  border-top: 0;
  padding-top: 0;
  margin-top: 0;
}
.rail-body h2 {
  margin-bottom: var(--u2);
}
.rail-body > .lede {
  margin-bottom: var(--u3);
}
.final-cta {
  border-top: 0;
}
.final-cta h2 {
  font-size: clamp(1.625rem, 3vw, 2.125rem);
}
.final-cta .lede {
  margin-block: var(--u2) var(--u3);
}

/* Askama record pages: model hero + sections */
.model-hero {
  padding-block: var(--u6) var(--u5);
  border-bottom: 1px solid var(--rule);
  margin-bottom: var(--u6);
}
.model-hero .back-link {
  display: inline-block;
  font-size: 0.8125rem;
  margin-bottom: var(--u3);
}
.model-hero h1 {
  margin-top: 2px;
}
.model-pinned-id {
  font-family: var(--font-typed);
  font-size: 0.78125rem;
  color: var(--carbon-2);
  margin-top: 8px;
}
.model-hero .lede {
  margin-top: var(--u2);
}
.status-section,
.section-tight {
  padding-block: var(--u5);
}
.section-heading {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  justify-content: space-between;
  gap: var(--u2) var(--u4);
  border-top: 2px solid var(--carbon);
  padding-top: var(--u2);
  margin-bottom: var(--u4);
}
.section-heading > p {
  font-size: 0.875rem;
  color: var(--carbon-2);
  max-width: 44ch;
  padding-bottom: 2px;
}
.section-heading h2 {
  margin-top: 2px;
}
/* the watchtower page's own hero */
main .hero[aria-labelledby='page-title'] {
  padding-block: var(--u6) var(--u5);
  border-bottom: 1px solid var(--rule);
  margin-bottom: var(--u5);
}
.hero .hero-lead h1 {
  margin-top: 2px;
}
.requested-banner {
  font-family: var(--font-typed);
  font-size: 0.78125rem;
  color: var(--carbon);
  background: var(--sunk);
  border: 1px solid var(--rule-strong);
  padding: 10px 14px;
  margin-top: var(--u2);
}

/* ---- 8 · state: shape + colour, typed labels ------------------------------ */
.state,
.status-cell {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-typed);
  font-weight: 600;
  font-size: 0.65625rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--carbon-2);
  text-decoration: none;
  white-space: nowrap;
}
.state::before {
  content: '';
}
.state::before,
.status-cell .status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  flex: none;
}
/* no alarm: an outline — the instrument does not congratulate */
.state-in::before,
.status-healthy .status-dot {
  background: transparent;
  box-shadow: inset 0 0 0 1.5px var(--carbon);
  border-radius: 50%;
}
/* not started / no measurement: the reserved swatch */
.state-none {
  color: var(--carbon-3);
}
.state-none::before,
.status-calibrating .status-dot {
  background: var(--no-data);
  border-radius: 50%;
}
/* alarm: a filled block */
.state-out {
  color: var(--limit);
}
.state-out::before,
.status-degraded .status-dot {
  background: var(--limit);
}
.status-degraded {
  color: var(--limit);
}
/* blocked: attention, not alarm — an amber diamond */
.status-blocked_missing_design {
  color: var(--watch-ink);
}
.status-blocked_missing_design .status-dot {
  background: var(--watch);
  transform: rotate(45deg);
}
.status-cell:hover {
  color: var(--carbon);
}
.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-typed);
  font-weight: 600;
  font-size: 0.65625rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--carbon-2);
  border: 1px solid var(--rule-strong);
  padding: 5px 10px;
}
.status-pill::before {
  content: '';
  width: 8px;
  height: 8px;
}
.status-pill.status-healthy::before {
  background: transparent;
  box-shadow: inset 0 0 0 1.5px var(--carbon);
  border-radius: 50%;
}
.status-pill.status-calibrating::before {
  background: var(--no-data);
  border-radius: 50%;
}
.status-pill.status-degraded {
  color: var(--limit);
  border-color: var(--limit);
}
.status-pill.status-degraded::before {
  background: var(--limit);
}
.status-pill.status-blocked_missing_design {
  color: var(--watch-ink);
  border-color: var(--watch);
}
.status-pill.status-blocked_missing_design::before {
  background: var(--watch);
  transform: rotate(45deg);
}

/* ---- 9 · data tables: the form grid --------------------------------------- */
.status-grid-wrap,
.grid-wrap,
.power-table-wrap {
  overflow-x: auto;
}
.status-grid,
.grid,
.power-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 680px;
}
.status-grid th,
.status-grid td,
.grid th,
.grid td,
.power-table th,
.power-table td {
  text-align: left;
  padding: 10px 14px 10px 0;
  border-bottom: 1px solid var(--rule-faint);
  font-size: 0.875rem;
}
.status-grid thead th,
.grid thead th,
.power-table thead th {
  font: 600 0.65625rem var(--font-form);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--carbon-3);
  border-bottom: 1px solid var(--rule);
  padding-block: 8px 6px;
}
.grid td.num,
.power-table td.num {
  font-family: var(--font-typed);
  font-size: 0.8125rem;
  font-variant-numeric: tabular-nums;
}
.status-grid tbody tr:hover td,
.grid tbody tr:hover td {
  background: var(--zone);
}
.status-grid th[scope='row'],
.grid th[scope='row'] {
  font: 600 0.875rem var(--font-form);
  border-bottom: 1px solid var(--rule-faint);
}
.model-link {
  color: var(--carbon);
  text-decoration: none;
  font-weight: 600;
}
.model-link:hover {
  color: var(--evidence);
  text-decoration: underline;
}
.model-id,
.route-id {
  display: block;
  font: 400 0.71875rem var(--font-typed);
  color: var(--carbon-3);
  margin-top: 3px;
  letter-spacing: 0.01em;
}
.route-name {
  display: block;
  font-weight: 600;
}
.instrument-caption {
  font-size: 0.8125rem;
  color: var(--carbon-2);
  line-height: 1.65;
  max-width: 76ch;
  margin-top: var(--u2);
}

/* ---- 10 · figures and charts ---------------------------------------------- */
.figure {
  background: var(--plate);
  border: 1px solid var(--rule-strong);
  margin-block: var(--u4);
}
.figure-label {
  font-family: var(--font-typed);
  font-weight: 600;
  font-size: 0.65625rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--carbon-3);
  border-bottom: 1px solid var(--rule);
  padding: 8px 14px;
}
.figure .grid-wrap {
  border-top: 0;
  padding-inline: 14px;
}
.figure-caption {
  font-size: 0.8125rem;
  color: var(--carbon-2);
  border-top: 1px solid var(--rule);
  padding: 12px 14px;
  line-height: 1.65;
}
.figure-caption b {
  color: var(--carbon);
}
.score-chart {
  background: var(--plate);
  border: 1px solid var(--rule-strong);
  padding: 10px;
  margin-block: var(--u3);
  overflow-x: auto;
}
.score-chart svg {
  display: block;
  width: 100%;
  min-width: 560px;
  height: auto;
}
.score-chart figcaption {
  font-size: 0.8125rem;
  color: var(--carbon-2);
  padding: 10px 6px 4px;
}
.chart-note {
  font-size: 0.875rem;
  color: var(--carbon-2);
  max-width: 76ch;
  margin-block: var(--u2);
}
.chart-note strong {
  color: var(--carbon);
}
.metric-row {
  display: flex;
  flex-wrap: wrap;
  border-top: 1px solid var(--rule);
  margin-block: var(--u3);
}
.metric-row > div {
  min-width: 132px;
  padding: 10px 28px 0 0;
}
.metric-row > div + div {
  border-left: 1px solid var(--rule);
  padding-left: 28px;
}
.metric-row dt {
  font: 600 0.65625rem var(--font-form);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--carbon-3);
}
.metric-row dd {
  font-family: var(--font-typed);
  font-weight: 600;
  font-size: 1.375rem;
  font-variant-numeric: tabular-nums;
  margin-top: 2px;
}

/* ---- 11 · model page family panels ---------------------------------------- */
.family-list {
  display: grid;
  gap: var(--u6);
  padding-bottom: var(--u8);
}
.family-panel {
  border-top: 2px solid var(--carbon);
  padding-top: var(--u2);
}
.family-panel.family-degraded {
  border-top-color: var(--limit);
}
.family-heading {
  display: flex;
  flex-wrap: wrap;
  align-items: start;
  justify-content: space-between;
  gap: var(--u2);
  margin-bottom: var(--u2);
}
.calibration-note {
  background: var(--sunk);
  border: 1px solid var(--rule);
  padding: 14px 16px;
  font-size: 0.875rem;
  color: var(--carbon-2);
  max-width: 72ch;
  margin-block: var(--u2);
}
.calibration-note strong {
  display: block;
  color: var(--carbon);
  margin-bottom: 4px;
}
.epoch-details {
  margin-top: var(--u3);
  border-top: 1px solid var(--rule);
}
.epoch-details summary {
  font: 600 0.8125rem var(--font-form);
  color: var(--carbon-2);
  padding-block: 10px;
  cursor: pointer;
}
.epoch-details summary:hover {
  color: var(--carbon);
}
.epoch-details dl {
  padding-block: 6px 14px;
  display: grid;
  gap: 10px;
}
.epoch-details dl > div {
  display: grid;
  grid-template-columns: minmax(140px, auto) 1fr;
  gap: 16px;
}
.epoch-details dt {
  font: 600 0.65625rem var(--font-form);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--carbon-3);
  padding-top: 3px;
}
.epoch-details dd {
  font-family: var(--font-typed);
  font-size: 0.78125rem;
  word-break: break-word;
}
.empty-state {
  border: 1px dashed var(--rule-strong);
  padding: var(--u4);
  max-width: 60ch;
}
.empty-state h3 {
  margin-bottom: 6px;
}
.empty-state p {
  font-size: 0.9375rem;
  color: var(--carbon-2);
}
.empty-state.compact {
  padding: var(--u2) var(--u3);
  margin-top: var(--u2);
}

/* ---- 12 · steps, ledgers, method cards ------------------------------------ */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--u4);
  margin-block: var(--u4);
}
.step-rule {
  display: none;
}
.step .step-n,
.verify-step .verify-n,
.step-n,
.verify-n {
  font-family: var(--font-typed);
  font-weight: 600;
  font-size: 0.71875rem;
  letter-spacing: 0.1em;
  color: var(--carbon-2);
  margin-bottom: 8px;
}
.step h3,
.verify-step h3 {
  margin-bottom: 6px;
}
.step p,
.verify-step p {
  font-size: 0.9375rem;
  color: var(--carbon-2);
  max-width: 38ch;
}
.verify-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--u4);
  margin-top: var(--u4);
}
.split .verify-steps {
  grid-template-columns: 1fr;
  margin-top: 0;
}
.split-specimen {
  margin-top: var(--u4);
}
.verify-step pre {
  margin-top: var(--u2);
}
.ledger {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--u4) var(--u5);
  border-top: 1px solid var(--rule);
  padding-top: var(--u3);
  margin-top: var(--u3);
}
.ledger h3 {
  margin-bottom: 8px;
}
.ledger p {
  font-size: 0.9375rem;
  color: var(--carbon-2);
}
.ledger .tag {
  display: block;
  margin-block: 10px 4px;
}
.method-card {
  border-top: 1px solid var(--rule-strong);
  padding-top: var(--u2);
}
.method-card h3 {
  margin-bottom: 8px;
}
.method-card p {
  font-size: 0.9375rem;
  color: var(--carbon-2);
  max-width: 62ch;
}
.method-card p + p {
  margin-top: 10px;
}
.methodology-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--u4);
}
.methodology-section {
  padding-block: var(--u5);
}
.label-notation {
  font-family: var(--font-typed);
  font-size: 0.71875rem;
  letter-spacing: 0.04em;
  color: var(--carbon-3);
  text-transform: none;
  margin-bottom: 6px;
}
.detail-link {
  font-size: 0.875rem;
}
.aggregator-note {
  font-size: 0.8125rem;
  color: var(--carbon-3);
  max-width: 70ch;
  margin-top: var(--u2);
}

/* methodology validity apparatus */
.boundary-callout {
  position: relative;
  border-top: 2px solid var(--limit);
  background: var(--limit-wash);
  padding: var(--u2) var(--u3) var(--u3);
  max-width: 76ch;
  margin-top: var(--u4);
}
.boundary-callout::before {
  content: "LIMIT · PUBLISHED";
  position: absolute;
  top: -0.55em;
  right: var(--u3);
  font: 600 0.625rem var(--font-typed);
  letter-spacing: 0.1em;
  color: var(--limit);
  background: var(--bond);
  padding-inline: 8px;
}
.boundary-callout .eyebrow {
  color: var(--limit);
}
.boundary-callout p {
  font-size: 0.9375rem;
}
.validity-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--u4);
  margin-block: var(--u4);
}
.validity-card {
  border-top: 1px solid var(--rule-strong);
  padding-top: var(--u2);
}
.validity-card-deployed {
  border-top: 2px solid var(--carbon);
}
.metric-value {
  font-family: var(--font-typed);
  font-weight: 600;
  font-size: 1.75rem;
  font-variant-numeric: tabular-nums;
}
.validity-card h3 {
  margin-top: 4px;
}
.validity-tier {
  font-family: var(--font-typed);
  font-size: 0.65625rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--carbon-3);
  margin-top: 4px;
}
.validity-note {
  font-size: 0.875rem;
  color: var(--carbon-2);
  margin-top: 8px;
}
.validity-pass {
  font-family: var(--font-typed);
  font-weight: 600;
  font-size: 0.71875rem;
  letter-spacing: 0.06em;
  margin-top: 8px;
}
.dependence-warning {
  border-top: 2px solid var(--limit);
}
.dependence-warning .metric-value {
  color: var(--limit);
}
.calibration-curve-panel {
  margin-top: var(--u4);
}
.calibration-deployed td {
  background: var(--zone);
}
.methodology-charts {
  display: grid;
  gap: var(--u3);
  margin-block: var(--u3);
}
.sample-family-list {
  display: grid;
  gap: var(--u4);
  margin-top: var(--u3);
}
.sample-family h3 {
  margin-bottom: var(--u2);
}
.sample-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--u3);
  margin-top: var(--u3);
}
.probe-sample {
  background: var(--plate);
  border: 1px solid var(--rule-strong);
  padding: 0;
  display: flex;
  flex-direction: column;
}
.probe-sample p {
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--carbon-2);
  padding: 14px var(--u2) var(--u2);
}
.probe-sample code {
  background: var(--sunk);
  border: 1px solid var(--rule-faint);
}
.probe-sample .sample-id {
  font-family: var(--font-typed);
  font-weight: 600;
  font-size: 0.65625rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--carbon-2);
  border-bottom: 1px solid var(--rule);
  padding: 9px var(--u2);
}

/* the certificate specimen: the one framed object, ported from the landing */
.specimen-frame {
  position: relative;
  background: var(--plate);
  border: 1px solid var(--carbon);
  outline: 1px solid var(--rule-strong);
  outline-offset: 4px;
  padding: var(--u3);
  margin: 5px;
}
.specimen-guilloche {
  display: none;
}
.specimen-head .mono-label {
  display: block;
}
.specimen-title {
  font-family: var(--font-masthead);
  font-weight: 500;
  font-size: 1.375rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-block: 6px 2px;
}
.specimen dl {
  display: grid;
  grid-template-columns: minmax(96px, auto) 1fr;
  gap: 7px 16px;
  border-top: 1px solid var(--rule);
  margin-top: var(--u2);
  padding-top: var(--u2);
}
.specimen dt {
  font: 600 0.65625rem var(--font-form);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--carbon-3);
  padding-top: 3px;
}
.specimen dd {
  font-family: var(--font-typed);
  font-size: 0.75rem;
  line-height: 1.5;
  word-break: break-word;
}
.specimen dd.strong {
  font-weight: 600;
}
.specimen dd.alarm {
  color: var(--limit);
  font-weight: 600;
}
.specimen-foot {
  border-top: 1px solid var(--rule);
  margin-top: var(--u2);
  padding-top: 12px;
}
.specimen-foot .microline {
  display: block;
}
.specimen-keyprint {
  display: block;
  margin-top: 10px;
}
.specimen-keyprint svg {
  display: block;
  margin-top: 6px;
}
.specimen-sig {
  display: block;
  margin-top: 12px;
}
.specimen-sig svg {
  display: block;
  width: 116px;
  height: auto;
  margin-left: auto;
  opacity: 0.9;
}
.microline {
  font-family: var(--font-typed);
  font-size: 0.71875rem;
  letter-spacing: 0.02em;
  color: var(--carbon-3);
}

/* ---- 13 · incidents ------------------------------------------------------- */
.incident-hero {
  margin-bottom: var(--u5);
}
.incident-list {
  display: grid;
  gap: var(--u4);
  padding-bottom: var(--u8);
}
.incident-card {
  border-top: 2px solid var(--carbon);
  padding-top: var(--u2);
}
.incident-card.incident-open {
  border-top-color: var(--limit);
}
.incident-card-heading {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--u2);
}
.incident-opened {
  font-family: var(--font-typed);
  font-size: 0.78125rem;
  color: var(--carbon-2);
  margin-top: 4px;
}
.incident-copy {
  font-size: 0.9375rem;
  color: var(--carbon-2);
  max-width: 72ch;
  margin-top: var(--u2);
}
.incident-heading-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  font-family: var(--font-typed);
  font-size: 0.78125rem;
  color: var(--carbon-2);
  margin-top: var(--u2);
}
.incident-detail {
  display: grid;
  gap: var(--u5);
  padding-bottom: var(--u8);
}
.incident-evidence {
  border-top: 2px solid var(--carbon);
  padding-top: var(--u2);
}
.lineage-grid {
  display: grid;
  grid-template-columns: minmax(140px, auto) 1fr;
  gap: 7px 16px;
  margin-top: var(--u2);
}
.lineage-grid dt {
  font: 600 0.65625rem var(--font-form);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--carbon-3);
  padding-top: 3px;
}
.lineage-grid dd {
  font-family: var(--font-typed);
  font-size: 0.78125rem;
  word-break: break-word;
}
.rebaseline-lineage {
  border-top: 1px solid var(--rule);
  margin-top: var(--u3);
  padding-top: var(--u2);
}

/* ---- 14 · pricing --------------------------------------------------------- */
.tiers {
  display: grid;
  border-top: 2px solid var(--carbon);
}
.tiers-3 {
  grid-template-columns: repeat(3, 1fr);
}
.tier {
  display: flex;
  flex-direction: column;
  padding: var(--u3) var(--u3) var(--u3) 0;
}
.tier + .tier {
  border-left: 1px solid var(--rule);
  padding-left: var(--u3);
}
.tier-featured {
  background: var(--zone);
  border-top: 2px solid var(--carbon);
  margin-top: -2px;
  padding: var(--u3);
}
.tier-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.tier-head h3 {
  font: 600 0.71875rem var(--font-form);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--carbon);
}
.tier-head .tag {
  color: var(--bond);
  background: var(--carbon);
  padding: 3px 7px;
}
.tier-price {
  font-family: var(--font-typed);
  font-weight: 600;
  font-size: 2rem;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
  margin-block: 10px var(--u2);
}
.tier-price small {
  display: block;
  font: 400 0.71875rem var(--font-typed);
  color: var(--carbon-2);
  letter-spacing: 0;
  margin-top: 6px;
}
.tier ul {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--u3);
  flex: 1;
}
.tier li {
  font-size: 0.875rem;
  color: var(--carbon-2);
  padding-block: 8px;
  border-top: 1px solid var(--rule-faint);
}
.tier li:first-child {
  border-top: 0;
  padding-top: 0;
}
.tier .btn {
  width: 100%;
}
.faq {
  display: grid;
  gap: 0;
  margin-top: var(--u4);
  max-width: 62ch;
}
.faq h3 {
  margin-bottom: 6px;
}
.faq p {
  font-size: 0.9375rem;
  color: var(--carbon-2);
}
.faq details {
  border-top: 1px solid var(--rule);
}
.faq details:last-child {
  border-bottom: 1px solid var(--rule);
}
.faq summary {
  font: 600 0.9375rem var(--font-form);
  color: var(--carbon);
  padding-block: 12px;
  cursor: pointer;
  list-style: none;
}
.faq summary::-webkit-details-marker {
  display: none;
}
.faq summary::before {
  content: "+";
  font-family: var(--font-typed);
  color: var(--carbon-3);
  margin-right: 10px;
}
.faq details[open] summary::before {
  content: "−";
}
.faq summary:hover {
  color: var(--evidence-deep);
}
.faq details > p {
  padding-bottom: var(--u2);
}
.compare {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--rule-strong);
  margin-top: var(--u4);
}
.compare > div {
  padding: 14px 16px 16px 0;
}
.compare > div + div {
  border-left: 1px solid var(--rule);
  padding-left: 16px;
}
.compare h3 {
  font-size: 0.9375rem;
  margin-bottom: 4px;
}
.compare p {
  font-size: 0.875rem;
  color: var(--carbon-2);
}

/* ---- 15 · certificates and verify ----------------------------------------- */
.manifest {
  list-style: none;
  padding: 0;
  margin: var(--u3) 0;
  max-width: 70ch;
}
.manifest li {
  font-size: 0.9375rem;
  color: var(--carbon-2);
  padding-block: 10px;
  border-bottom: 1px solid var(--rule-faint);
}
.manifest li b,
.manifest li code {
  color: var(--carbon);
}
.honesty {
  position: relative;
  border-top: 2px solid var(--limit);
  background: var(--limit-wash);
  padding: var(--u3) var(--u4) var(--u4);
  max-width: 76ch;
}
.honesty::before {
  content: 'LIMIT · PUBLISHED';
  position: absolute;
  top: -0.55em;
  right: var(--u4);
  font: 600 0.625rem var(--font-typed);
  letter-spacing: 0.1em;
  color: var(--limit);
  background: var(--bond);
  padding-inline: 8px;
}
.honesty-head .eyebrow {
  color: var(--limit);
}
/* links on the wash need the deep evidence ink to clear AA */
.honesty a,
.boundary-callout a {
  color: var(--evidence-deep);
}
.honesty a:hover,
.boundary-callout a:hover {
  color: var(--carbon);
}
.honesty-body {
  font-size: 0.9375rem;
  color: var(--carbon-2);
  max-width: 70ch;
}
.honesty-body p + p {
  margin-top: 10px;
}
.honesty-body strong {
  color: var(--carbon);
}
.codeblock {
  display: block;
  font-family: var(--font-typed);
  font-size: 0.78125rem;
  line-height: 1.65;
  background: var(--carbon);
  color: var(--bond);
  padding: 14px 16px;
  overflow-x: auto;
  margin-block: var(--u2);
  white-space: pre-wrap;
  word-break: break-word;
}
pre.codeblock {
  white-space: pre;
}

/* ---- 16 · forms ----------------------------------------------------------- */
.form {
  display: grid;
  gap: var(--u3);
  max-width: 30rem;
}
.field label {
  display: block;
  font: 600 0.71875rem var(--font-form);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--carbon-2);
  margin-bottom: 6px;
}
.field .optional {
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0.02em;
  color: var(--carbon-3);
}
.field input,
.field select,
.field textarea {
  width: 100%;
  font-family: var(--font-typed);
  font-size: 0.875rem;
  color: var(--carbon);
  background: var(--plate);
  border: 1px solid var(--rule-strong);
  border-radius: var(--radius);
  padding: 10px 12px;
}
.field input::placeholder {
  color: var(--carbon-3);
}
.field input:focus-visible,
.field select:focus-visible,
.field textarea:focus-visible {
  outline: 2px solid var(--carbon);
  outline-offset: 1px;
  border-color: var(--carbon);
}
.field input[aria-invalid='true'] {
  border-color: var(--limit);
}
.field input[type='file']::file-selector-button {
  font: 600 0.8125rem var(--font-form);
  color: var(--carbon);
  background: var(--sunk);
  border: 1px solid var(--rule-strong);
  border-radius: 0;
  padding: 6px 12px;
  margin-right: 12px;
  cursor: pointer;
  transition: background var(--dur) var(--ease);
}
.field input[type='file']::file-selector-button:hover {
  background: var(--zone-2);
}
.field textarea {
  resize: vertical;
}
.field.track {
  border: 0;
  padding: 0;
  margin: 0;
}
.field.track legend {
  font: 600 0.71875rem var(--font-form);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--carbon-2);
  margin-bottom: 8px;
}
.field.track .track-opt {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding-block: 6px;
  margin-bottom: 0;
  font: 400 0.9375rem var(--font-form);
  letter-spacing: 0;
  text-transform: none;
  color: var(--carbon-2);
  cursor: pointer;
}
.field.track .track-opt input {
  width: auto;
  padding: 0;
  border: 0;
  background: none;
  margin-top: 4px;
  flex: none;
  accent-color: var(--carbon);
}
.track-opt b {
  color: var(--carbon);
}
.track-opt input {
  accent-color: var(--carbon);
}
.field-note {
  font-size: 0.8125rem;
  color: var(--carbon-3);
  margin-top: 6px;
  max-width: 44ch;
}
.terms {
  font-size: 0.8125rem;
  color: var(--carbon-3);
  max-width: 44ch;
}
.split {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: var(--u6);
  align-items: start;
}
.split-annotated .stack {
  display: grid;
  gap: 2px;
}
.stack .label {
  margin-bottom: 2px;
}
.stack .caption {
  margin-bottom: var(--u2);
}

/* ---- 17 · misc prose ------------------------------------------------------ */
.operator-todo {
  font-family: var(--font-typed);
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--carbon-2);
  background: var(--sunk);
  border: 1px solid var(--rule);
  padding: var(--u3);
  max-width: 72ch;
}
.not-found {
  padding-block: var(--u12);
  max-width: 60ch;
}
.not-found p {
  color: var(--carbon-2);
  margin-top: var(--u2);
}

/* ---- 18 · footer: end of record ------------------------------------------- */
footer.site {
  border-top: 2px solid var(--carbon);
  margin-top: var(--u10);
  padding-block: var(--u6) var(--u4);
}
.foot-top {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) repeat(4, minmax(0, 1fr));
  gap: var(--u4);
}
.foot-brand .wordmark {
  margin-bottom: 10px;
}
.foot-brand p {
  font-size: 0.875rem;
  color: var(--carbon-2);
  max-width: 34ch;
}
.foot-col h4 {
  font: 600 0.65625rem var(--font-typed);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--carbon-3);
  margin-bottom: 10px;
}
.foot-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 7px;
}
.foot-col a {
  font-size: 0.875rem;
  color: var(--carbon-2);
  text-decoration: none;
}
.foot-col a:hover {
  color: var(--evidence);
  text-decoration: underline;
}
.foot-mark {
  margin-top: var(--u6);
  color: var(--carbon);
  user-select: none;
}
.foot-mark .tickrule {
  display: block;
  width: 100%;
  height: 14px;
}
.foot-word {
  display: block;
  font-family: var(--font-masthead);
  font-weight: 600;
  font-size: clamp(2.75rem, 10vw, 8.25rem);
  line-height: 1.04;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: rgba(27, 29, 28, 0.09);
  white-space: nowrap;
  overflow: hidden;
  transition: color 200ms var(--ease);
}
.foot-mark:hover .foot-word {
  color: rgba(27, 29, 28, 0.18);
}
.colophon {
  font-size: 0.8125rem;
  color: var(--carbon-2);
  margin-top: var(--u4);
  max-width: 86ch;
  line-height: 1.7;
}

/* scroll entrances (reveal.js marks blocks; base state stays visible) */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition:
    opacity var(--slow) var(--ease),
    transform var(--slow) var(--ease);
}
.js [data-reveal].in {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  .js [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* the closing moment: the tick rule draws and the ghost word rises with the
   reader's own scroll — transform/opacity only, still under reduced motion */
@supports (animation-timeline: view()) {
  .foot-mark .tickrule {
    transform-origin: left;
    animation: tickdraw linear both;
    animation-timeline: view();
    animation-range: entry 10% entry 90%;
  }
  .foot-word {
    animation: wordrise linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 100%;
  }
  @keyframes tickdraw {
    from {
      transform: scaleX(0.24);
      opacity: 0;
    }
    to {
      transform: none;
      opacity: 1;
    }
  }
  @keyframes wordrise {
    from {
      transform: translateY(26px);
      opacity: 0.35;
    }
    to {
      transform: none;
      opacity: 1;
    }
  }
  @media (prefers-reduced-motion: reduce) {
    .foot-mark .tickrule,
    .foot-word {
      animation: none;
    }
  }
}

/* ---- 19 · responsive ------------------------------------------------------ */
@media (max-width: 62rem) {
  .hero,
  .split {
    grid-template-columns: 1fr;
    gap: var(--u3);
  }
  .masthead nav {
    gap: var(--u2);
  }
  .masthead nav a:not(.btn):nth-child(n + 4) {
    display: none;
  }
  .steps,
  .verify-steps,
  .methodology-grid,
  .validity-list {
    grid-template-columns: 1fr;
    gap: var(--u4);
  }
  .tiers-3 {
    grid-template-columns: 1fr;
  }
  .tier {
    padding-right: 0;
  }
  .tier + .tier {
    border-left: 0;
    border-top: 1px solid var(--rule);
    padding-left: 0;
    padding-top: var(--u3);
  }
  .tier-featured {
    padding: var(--u3);
  }
  .ledger,
  .sample-grid {
    grid-template-columns: 1fr;
  }
  .compare {
    grid-template-columns: 1fr;
  }
  .compare > div + div {
    border-left: 0;
    border-top: 1px solid var(--rule);
    padding-left: 0;
  }
  .foot-top {
    grid-template-columns: 1fr 1fr;
    gap: var(--u4) var(--u3);
  }
  .band {
    padding-block: var(--u6) var(--u8);
  }
}
@media (max-width: 40rem) {
  .page,
  .page-narrow {
    padding-inline: var(--u2);
  }
  .metric-row > div {
    min-width: 0;
    flex: 1 1 40%;
  }
  .metric-row > div + div {
    padding-left: 16px;
    padding-right: 12px;
  }
  .foot-top {
    grid-template-columns: 1fr;
  }
  .foot-word {
    letter-spacing: 0.2em;
  }
  .masthead nav a:not(.btn) {
    display: none;
  }
}
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}