/* ==========================================================================
   Quantitative Markets Research Lab — shared stylesheet
   Palette: warm paper / ink / oxblood accent
   Type: system-native literary serif + system monospace (zero font payload)
   ========================================================================== */

:root {
  --paper:      #f7f4ee;
  --paper-deep: #efeae0;
  --ink:        #1c1a17;
  --ink-soft:   #46423c;
  --muted:      #6d675e;
  --faint:      #9a938a;
  --rule:       #ddd6c8;
  --rule-soft:  #e7e1d4;
  --accent:     #8a3033;   /* oxblood */
  --accent-dim: #a86063;
  --slate:      #3e5c76;   /* chart secondary */
  --ochre:      #a07c33;
  --moss:       #5c6e4e;
  --plum:       #6b4a6e;
  --serif: 'Iowan Old Style', 'Palatino Linotype', 'Book Antiqua', Palatino, Georgia, serif;
  --mono:  'SFMono-Regular', 'SF Mono', Menlo, Consolas, 'Liberation Mono', monospace;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.62;
  font-feature-settings: "liga" 1;
  text-rendering: optimizeLegibility;
}

.skip-link {
  position: fixed;
  z-index: 10000;
  top: 0.6rem;
  left: 0.6rem;
  padding: 0.65rem 0.9rem;
  transform: translateY(-180%);
  border: 2px solid var(--accent);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.78rem;
  text-decoration: none;
}

.skip-link:focus { transform: translateY(0); }

.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

:where(a, button, input, select, summary):focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

main:focus { outline: none; }

/* ---------- layout ---------- */

.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 28px;
}

.narrow { max-width: 760px; }

main { padding-bottom: 5rem; }

/* ---------- header / nav ---------- */

.site-header {
  border-bottom: 1px solid var(--rule);
  padding: 1.5rem 0 1.1rem;
}

.site-header .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem 2rem;
}

.wordmark {
  font-family: var(--serif);
  font-size: 1.18rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--ink);
  text-decoration: none;
}
.wordmark .tail { color: var(--muted); font-weight: 400; font-style: italic; }

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.15rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
}
.site-nav a:hover { color: var(--ink); }
.site-nav a[aria-current="page"] {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* ---------- footer ---------- */

.site-footer {
  border-top: 1px solid var(--rule);
  margin-top: 4rem;
  padding: 1.6rem 0 2.4rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  color: var(--faint);
}
.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 2rem;
}
.site-footer a { color: var(--muted); text-decoration: none; border-bottom: 1px solid var(--rule); }
.site-footer a:hover { color: var(--accent); }

/* ---------- typography ---------- */

h1, h2, h3 {
  font-family: var(--serif);
  font-weight: 500;
  line-height: 1.18;
  color: var(--ink);
  margin: 0 0 0.6em;
}

h1 { font-size: 2.5rem;  letter-spacing: -0.012em; }
h2 { font-size: 1.62rem; letter-spacing: -0.008em; margin-top: 0; }
h3 { font-size: 1.18rem; font-weight: 600; }

p { margin: 0 0 1.1em; }
p.lede {
  font-size: 1.22rem;
  line-height: 1.55;
  color: var(--ink-soft);
}

a { color: var(--accent); }
a:hover { color: var(--ink); }

strong { font-weight: 600; }
em { font-style: italic; }

hr {
  border: none;
  border-top: 1px solid var(--rule);
  margin: 3rem 0;
}

/* kicker: small-caps section label */
.kicker {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.9rem;
}
.kicker::before {
  content: "";
  display: inline-block;
  width: 1.6rem;
  height: 1px;
  background: var(--accent);
  vertical-align: middle;
  margin-right: 0.65rem;
}

.section {
  padding-top: 3.2rem;
}
.section + .section {
  margin-top: 3.2rem;
  border-top: 1px solid var(--rule);
}

.page-head {
  padding: 3.4rem 0 2.4rem;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 0.5rem;
}
.page-head p.lede { max-width: 46em; margin-bottom: 0; }

/* ---------- home ---------- */

.hero { padding: 4.5rem 0 3.4rem; }
.hero h1 { max-width: 15em; }
.hero .lede { max-width: 36em; }

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.8rem;
}
.hero-actions a {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.6rem;
  min-height: 48px;
  padding: 0.72rem 1rem;
  border: 1px solid var(--ink);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
}
.primary-action { background: var(--ink); color: var(--paper); }
.primary-action:hover { border-color: var(--accent); background: var(--accent); color: var(--paper); }
.secondary-action { color: var(--ink); }
.secondary-action:hover { border-color: var(--accent); color: var(--accent); }

.arrival-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 0 0 3rem;
  border: 1px solid var(--rule);
  background: var(--rule);
  gap: 1px;
}
.arrival-item { min-width: 0; padding: 1.3rem 1.35rem 1.4rem; background: var(--paper); }
.arrival-item.arrival-new { background: var(--paper-deep); }
.arrival-item .kicker { margin-bottom: 0.7rem; font-size: 0.61rem; }
.arrival-item .kicker::before { display: none; }
.arrival-item h2 { font-size: 1.08rem; margin-bottom: 0.5rem; }
.arrival-item p:not(.kicker) { color: var(--muted); font-size: 0.88rem; line-height: 1.5; }
.arrival-item > a { font-family: var(--mono); font-size: 0.66rem; text-decoration: none; }

.thesis {
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 2.4rem 0;
  margin: 2.5rem 0;
}
.thesis blockquote {
  margin: 0;
  font-size: 1.45rem;
  line-height: 1.45;
  font-style: italic;
  color: var(--ink-soft);
  max-width: 30em;
}
.thesis blockquote .plain { font-style: normal; }

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  margin-top: 2rem;
}

.card {
  background: var(--paper);
  padding: 1.6rem 1.5rem 1.5rem;
  text-decoration: none;
  color: var(--ink);
  display: block;
  transition: background 120ms ease;
}
.card:hover { background: var(--paper-deep); color: var(--ink); }
.card .card-no {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: var(--faint);
  display: block;
  margin-bottom: 0.8rem;
}
.card h2 { margin-bottom: 0.45rem; font-size: 1.18rem; font-weight: 600; }
.card p { font-size: 0.95rem; color: var(--muted); margin: 0; line-height: 1.5; }
.card:hover h2 { color: var(--accent); }

/* ---------- two-column tool layout ---------- */

.tool-grid {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 2.6rem;
  align-items: start;
  margin-top: 2rem;
}
@media (max-width: 880px) {
  .tool-grid { grid-template-columns: 1fr; }
}

.prose-col { max-width: 46em; }

/* ---------- controls ---------- */

.panel {
  border: 1px solid var(--rule);
  background: var(--paper);
  padding: 1.3rem 1.3rem 1.4rem;
}
.panel + .panel { margin-top: 1.2rem; }
.panel h2,
.panel h3 {
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 1.1rem;
}

.ctrl { margin-bottom: 0.95rem; }
.ctrl:last-child { margin-bottom: 0; }

.ctrl label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.03em;
  color: var(--ink-soft);
  margin-bottom: 0.3rem;
}
.ctrl label .val {
  color: var(--accent);
  font-weight: 500;
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 44px;
  background-color: transparent;
  background-image: linear-gradient(var(--rule), var(--rule));
  background-position: center;
  background-repeat: no-repeat;
  background-size: 100% 2px;
  margin: 0.05rem 0;
  cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--paper);
  border: 1.5px solid var(--accent);
  cursor: pointer;
}
input[type="range"]::-moz-range-thumb {
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--paper);
  border: 1.5px solid var(--accent);
  cursor: pointer;
}

input[type="range"]::-moz-range-track {
  height: 2px;
  background: var(--rule);
}

select, input[type="number"] {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--rule);
  padding: 0.4rem 0.55rem;
  width: 100%;
  min-height: 44px;
}

/* segmented toggle */
.seg {
  display: inline-flex;
  border: 1px solid var(--rule);
}
.seg button {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--paper);
  color: var(--muted);
  border: none;
  padding: 0.45rem 0.95rem;
  min-width: 44px;
  min-height: 44px;
  cursor: pointer;
}
.seg button + button { border-left: 1px solid var(--rule); }
.seg button.active {
  background: var(--ink);
  color: var(--paper);
}

.btn {
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: var(--ink);
  color: var(--paper);
  border: 1px solid var(--ink);
  padding: 0.6rem 1.4rem;
  min-height: 44px;
  cursor: pointer;
}
.btn:hover { background: var(--accent); border-color: var(--accent); }

/* checkbox rows */
.check-row {
  display: flex;
  align-items: center;
  min-height: 44px;
  gap: 0.55rem;
  font-family: var(--mono);
  font-size: 0.76rem;
  color: var(--ink-soft);
  padding: 0.28rem 0;
}
.check-row input { accent-color: var(--accent); }

/* ---------- results / stats ---------- */

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 1px;
  background: var(--rule-soft);
  border: 1px solid var(--rule-soft);
}
.stat {
  background: var(--paper);
  padding: 0.75rem 0.85rem;
}
.stat .k {
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--faint);
  display: block;
  margin-bottom: 0.25rem;
}
.stat .v {
  font-family: var(--mono);
  font-size: 1.02rem;
  color: var(--ink);
}
.stat dd { margin: 0; }
.stat .v.accent { color: var(--accent); }

.price-display {
  display: flex;
  flex-wrap: wrap;
  gap: 1px;
  background: var(--rule-soft);
  border: 1px solid var(--rule-soft);
  margin-bottom: 1.4rem;
}
.price-display .stat { flex: 1 1 160px; padding: 1rem 1.1rem; }
.price-display .stat .v { font-size: 1.55rem; }

/* data tables */
table.data {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 0.78rem;
  margin: 1.2rem 0;
}
table.data th {
  text-align: left;
  font-weight: 500;
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--faint);
  border-bottom: 1px solid var(--rule);
  padding: 0.5rem 0.9rem 0.5rem 0;
}
table.data td {
  border-bottom: 1px solid var(--rule-soft);
  padding: 0.48rem 0.9rem 0.48rem 0;
  color: var(--ink-soft);
}
table.data td.num, table.data th.num { text-align: right; }
table.data td:first-child { color: var(--ink); }
table.data tbody th {
  border-bottom: 1px solid var(--rule-soft);
  padding: 0.48rem 0.9rem 0.48rem 0;
  color: var(--ink);
  text-align: left;
  font-size: 0.78rem;
  font-weight: 400;
  letter-spacing: normal;
  text-transform: none;
}

/* ---------- charts ---------- */

.chart {
  width: 100%;
  min-height: 340px;
  border: 1px solid var(--rule);
  background: var(--paper);
  margin: 1.4rem 0;
}
.chart.tall { min-height: 420px; }
.chart.short { min-height: 280px; }

.chart-caption, .figure-note {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.05em;
  color: var(--faint);
  margin: -0.7rem 0 1.6rem;
}

.chart-figure { margin: 1.4rem 0 1.6rem; }
.chart-figure .chart { margin-bottom: 1.4rem; }
.chart-figure .chart-caption { margin-bottom: 0; }

.chart-data {
  margin: 0.85rem 0 1.8rem;
  border-top: 1px solid var(--rule-soft);
  border-bottom: 1px solid var(--rule-soft);
}

.chart-data summary {
  min-height: 44px;
  padding: 0.65rem 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
}

.chart-data[open] summary { color: var(--accent); }
.table-scroll { max-width: 100%; overflow-x: auto; }
.table-scroll > table {
  width: 100%;
  min-width: 620px;
  margin: 0.9rem 0 1.2rem;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 0.76rem;
}
.table-scroll > table caption {
  padding: 0.35rem 0 0.65rem;
  color: var(--muted);
  text-align: left;
  font-size: 0.68rem;
}
.table-scroll > table th,
.table-scroll > table td {
  padding: 0.5rem 0.8rem 0.5rem 0;
  border-bottom: 1px solid var(--rule-soft);
  text-align: left;
  white-space: nowrap;
}
.table-scroll > table thead th {
  color: var(--faint);
  font-size: 0.64rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.table-scroll > table tbody th { color: var(--ink); font-weight: 500; }
.table-scroll > table td { color: var(--ink-soft); }
.chart-data table {
  width: 100%;
  margin: 0.3rem 0 1rem;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 0.72rem;
}
.chart-data caption,
table.data caption {
  padding: 0.35rem 0 0.65rem;
  color: var(--muted);
  text-align: left;
  font-family: var(--mono);
  font-size: 0.68rem;
}
.chart-data th,
.chart-data td {
  padding: 0.45rem 0.7rem 0.45rem 0;
  border-bottom: 1px solid var(--rule-soft);
  text-align: right;
  white-space: nowrap;
}
.chart-data th:first-child,
.chart-data td:first-child { text-align: left; }
.chart-data thead th {
  color: var(--faint);
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.chart-data tbody th { color: var(--ink-soft); font-weight: 500; }

.chart-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.4rem;
}

.chart-load-failed {
  display: grid;
  place-items: center;
  padding: 2rem;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.75rem;
  text-align: center;
}

/* ---------- empirical research metadata ---------- */

.revision-line {
  margin-top: 1.1rem;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.04em;
}

.provenance-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: 1.2rem 0;
  border: 1px solid var(--rule);
  background: var(--rule);
}
.provenance-grid > div { min-width: 0; padding: 1rem; background: var(--paper); }
.provenance-grid dt,
.select-label {
  display: block;
  margin-bottom: 0.3rem;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}
.provenance-grid dd { margin: 0; color: var(--ink-soft); font-size: 0.88rem; line-height: 1.45; overflow-wrap: anywhere; }
.provenance-grid code { font-size: 0.76em; }
.compact-panel { max-width: 320px; margin-top: 1.2rem; }
.compact-panel .figure-note { display: block; margin: 0.45rem 0 0; }
.calibration-stats { margin: 1.2rem 0 1.8rem; }
.result-reject { color: var(--accent); font-weight: 600; }

.bibliography { margin: 1.2rem 0; padding-left: 1.4rem; }
.bibliography li { margin: 0 0 0.8rem; color: var(--ink-soft); font-size: 0.92rem; line-height: 1.55; }
.bibliography a { overflow-wrap: anywhere; }

code { font-family: var(--mono); font-size: 0.82em; }
@media (max-width: 880px) {
  .chart-pair { grid-template-columns: 1fr; }
  .arrival-grid { grid-template-columns: 1fr; }
  .provenance-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* ---------- callouts / math ---------- */

.note {
  border-left: 2px solid var(--accent);
  padding: 0.15rem 0 0.15rem 1.3rem;
  margin: 1.8rem 0;
  color: var(--ink-soft);
  font-size: 0.98rem;
}
.note .note-label {
  font-family: var(--mono);
  font-size: 0.64rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  display: block;
  margin-bottom: 0.35rem;
}

.math-block {
  margin: 1.6rem 0;
  padding: 1.2rem 1.4rem;
  border: 1px solid var(--rule-soft);
  background: rgba(255,255,255,0.45);
  overflow-x: auto;
  overflow-y: hidden;
  max-width: 100%;
  scrollbar-width: thin;
  scrollbar-color: var(--faint) transparent;
  -webkit-overflow-scrolling: touch;
}

.math-block::-webkit-scrollbar,
.table-scroll::-webkit-scrollbar { height: 8px; }
.math-block::-webkit-scrollbar-thumb,
.table-scroll::-webkit-scrollbar-thumb { border-radius: 999px; background: var(--faint); }
.math-block::-webkit-scrollbar-track,
.table-scroll::-webkit-scrollbar-track { background: transparent; }

.katex {
  font-size: 1.04em;
  font-size: max(1rem, 1.04em);
}
.katex-display {
  margin: 0.4em 0;
  overflow: visible;
}

.scroll-frame { position: relative; max-width: 100%; }
.scroll-frame > .math-block,
.scroll-frame > .table-scroll { margin-left: 0; margin-right: 0; }
.scroll-cue {
  position: absolute;
  z-index: 2;
  top: 0.45rem;
  right: 0.5rem;
  border: 1px solid var(--rule);
  background: var(--paper);
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  color: var(--muted);
  padding: 0.18rem 0.38rem;
  font-family: var(--mono);
  font-size: 0.61rem;
  letter-spacing: 0.06em;
  line-height: 1.4;
  text-transform: uppercase;
  pointer-events: none;
}
.scroll-frame.is-overflowing::after {
  content: "";
  position: absolute;
  z-index: 1;
  top: 1px;
  right: 1px;
  bottom: 9px;
  width: 1.5rem;
  background: linear-gradient(90deg, transparent, rgba(247,244,238,0.92));
  pointer-events: none;
}
.scroll-frame-table.is-overflowing > .table-scroll { padding-top: 1.9rem; }
.scroll-region:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* ---------- long-form reading tools ---------- */

[id].reference-heading { scroll-margin-top: 5.5rem; }

.reading-meta {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.35rem 1rem;
  margin: 1.6rem 0 0;
  padding: 1rem 0;
  border-top: 1px solid var(--rule-soft);
  border-bottom: 1px solid var(--rule-soft);
}
.reading-meta dt,
.note-meta,
.local-toc summary,
.local-toc a,
.cite-button,
.section-nav a {
  font-family: var(--mono);
}
.reading-meta dt {
  color: var(--faint);
  font-size: 0.64rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.reading-meta dd {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.local-toc {
  position: sticky;
  z-index: 20;
  top: 0.5rem;
  margin: 1.25rem 0 0;
  border: 1px solid var(--rule);
  background: var(--paper);
  background: color-mix(in srgb, var(--paper) 96%, transparent);
  box-shadow: 0 0.4rem 1.2rem rgba(28,26,23,0.04);
}
.local-toc summary {
  min-height: 44px;
  padding: 0.65rem 0.85rem;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.local-toc[open] summary { border-bottom: 1px solid var(--rule-soft); color: var(--accent); }
.local-toc ol {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 1px;
  list-style: none;
  background: var(--rule-soft);
}
.local-toc li { min-width: 0; background: var(--paper); }
.local-toc a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 0.55rem 0.75rem;
  color: var(--ink-soft);
  font-size: 0.68rem;
  line-height: 1.35;
  text-decoration: none;
}
.local-toc a:hover { color: var(--accent); background: var(--paper-deep); }

.reference-heading { position: relative; }
.heading-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  min-height: 32px;
  margin-left: 0.2rem;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 0.75rem;
  line-height: 1;
  opacity: 0;
  text-decoration: none;
  vertical-align: 0.12em;
}
.reference-heading:hover .heading-link,
.heading-link:focus-visible { opacity: 1; }
.heading-link:hover { color: var(--accent); }

.note-meta {
  margin: -0.25rem 0 1.4rem;
  color: var(--faint);
  font-size: 0.67rem;
  letter-spacing: 0.04em;
  line-height: 1.55;
}
.reading-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.4rem 0 0;
}
.cite-button {
  min-height: 44px;
  border: 1px solid var(--rule);
  background: var(--paper);
  color: var(--muted);
  padding: 0.55rem 0.8rem;
  cursor: pointer;
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.cite-button:hover { border-color: var(--accent); color: var(--accent); }

.section-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 2.2rem 0 0;
  border: 1px solid var(--rule-soft);
  background: var(--rule-soft);
}
.section-nav a {
  display: flex;
  align-items: center;
  min-height: 54px;
  padding: 0.65rem 0.8rem;
  background: var(--paper);
  color: var(--muted);
  font-size: 0.66rem;
  line-height: 1.4;
  text-decoration: none;
}
.section-nav a:last-child { justify-content: flex-end; text-align: right; }
.section-nav a:hover { color: var(--accent); background: var(--paper-deep); }
.section-nav .nav-placeholder { min-height: 54px; background: var(--paper); }

.comparison-table { min-width: 42rem; }

/* definition-style list for assumptions */
dl.assume { margin: 1.4rem 0; }
dl.assume dt {
  font-weight: 600;
  margin-top: 0.9rem;
}
dl.assume dd {
  margin: 0.15rem 0 0 0;
  color: var(--ink-soft);
  font-size: 0.97rem;
}

ul.refs, ol.refs { padding-left: 1.3rem; }
ul.refs li, ol.refs li { margin-bottom: 0.45rem; font-size: 0.97rem; color: var(--ink-soft); }

/* research question block */
.rq {
  margin: 2.2rem 0;
  padding: 1.8rem 1.9rem;
  border: 1px solid var(--rule);
  background: var(--paper-deep);
}
.rq .kicker { margin-bottom: 0.7rem; }
.rq p {
  font-size: 1.18rem;
  font-style: italic;
  color: var(--ink-soft);
  margin: 0;
}

/* mono inline tag */
.tag {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: 1px solid var(--rule);
  color: var(--muted);
  padding: 0.14rem 0.5rem;
  white-space: nowrap;
}
.tag.warn { border-color: var(--accent-dim); color: var(--accent); }

sup, sub { line-height: 0; }

/* about page */
.credo {
  font-size: 1.5rem;
  font-style: italic;
  line-height: 1.4;
  color: var(--ink-soft);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 2.2rem 0;
  margin: 2.6rem 0;
  max-width: 26em;
}

/* ---------- research ledger ---------- */

.ledger-head .lede { max-width: 45em; }

.ledger-preface {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(380px, 0.95fr);
  gap: 3rem;
  align-items: end;
  padding: 2.6rem 0;
  border-bottom: 1px solid var(--rule);
}

.ledger-principle {
  max-width: 25em;
  margin: 0;
  color: var(--ink-soft);
  font-size: 1.4rem;
  font-style: italic;
  line-height: 1.4;
}

.ledger-summary {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  border: 1px solid var(--rule-soft);
  background: var(--rule-soft);
}

.ledger-summary > div {
  min-width: 0;
  padding: 0.8rem 0.9rem;
  background: var(--paper);
}

.ledger-summary dt,
.ledger-record dt {
  margin: 0 0 0.35rem;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.13em;
  line-height: 1.45;
  text-transform: uppercase;
}

.ledger-summary dd {
  margin: 0;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.88rem;
}

.ledger-summary code { font-size: 0.72rem; }

.ledger-key {
  padding: 2.4rem 0;
  border-bottom: 1px solid var(--rule);
}

.status-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(235px, 1fr));
  gap: 0.9rem 1.5rem;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.45;
}

.status {
  display: inline-block;
  border: 1px solid currentColor;
  padding: 0.16rem 0.48rem 0.11rem;
  font-family: var(--mono);
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  line-height: 1.45;
  text-transform: uppercase;
  white-space: nowrap;
}

.status-list .status { min-width: 6.3rem; margin-right: 0.35rem; text-align: center; }
.status-proposed { color: var(--muted); }
.status-running { color: var(--slate); }
.status-replicated { color: var(--moss); }
.status-rejected { color: var(--accent); }
.status-revised { color: #73571f; }

.ledger-index {
  padding: 3rem 0 1rem;
}

.ledger-index ol {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 1.4rem 0 0;
  padding: 1px;
  list-style: none;
  background: var(--rule);
}

.ledger-index li { min-width: 0; background: var(--paper); }

.ledger-index a {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 0.75rem;
  align-items: center;
  min-height: 4.4rem;
  padding: 0.9rem 1rem;
  color: var(--ink);
  text-decoration: none;
}

.ledger-index a:hover { background: var(--paper-deep); }

.ledger-index a > span:first-child {
  color: var(--faint);
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.12em;
}

.ledger { margin-top: 1.5rem; }

.ledger-entry {
  scroll-margin-top: 1rem;
  padding-top: 3.8rem;
}

.ledger-entry + .ledger-entry {
  margin-top: 3.8rem;
  border-top: 1px solid var(--rule);
}

.ledger-entry-head {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.ledger-entry-head h2 { max-width: 25em; margin-bottom: 0; }

.ledger-number {
  display: block;
  margin-bottom: 0.55rem;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  line-height: 1.5;
  text-transform: uppercase;
}

.ledger-entry-head > .status { margin-top: 0.1rem; }

.ledger-record {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  border: 1px solid var(--rule);
  background: var(--rule);
}

.ledger-record > div {
  min-width: 0;
  padding: 1.2rem 1.3rem 1.25rem;
  background: var(--paper);
}

.ledger-record > .ledger-wide { grid-column: 1 / -1; }

.ledger-record dd {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.96rem;
  line-height: 1.55;
}

.ledger-record code,
.ledger-protocol code {
  font-family: var(--mono);
  font-size: 0.78em;
}

.ledger-protocol {
  margin-top: 5rem;
  padding-top: 3.2rem;
  border-top: 1px solid var(--rule);
}

.ledger-protocol pre {
  max-width: 100%;
  margin: 1.4rem 0;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  border: 1px solid var(--rule);
  background: var(--paper-deep);
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 0.75rem;
  line-height: 1.65;
}

@media (max-width: 760px) {
  .ledger-preface { grid-template-columns: 1fr; gap: 1.7rem; }
  .ledger-index ol { grid-template-columns: 1fr; }
  .ledger-record { grid-template-columns: 1fr; }
  .ledger-record > .ledger-wide { grid-column: auto; }
  .ledger-entry { padding-top: 3rem; }
  .ledger-entry + .ledger-entry { margin-top: 3rem; }
}

@media (max-width: 480px) {
  .ledger-summary { grid-template-columns: 1fr; }
  .ledger-index a { grid-template-columns: auto minmax(0, 1fr); }
  .ledger-index a > .status { grid-column: 2; justify-self: start; }
  .ledger-entry-head { flex-direction: column; gap: 0.8rem; }
  .ledger-record > div { padding: 1.05rem 1rem 1.1rem; }
}

@media (max-width: 640px) {
  body { font-size: 16.5px; }
  h1 { font-size: 1.9rem; }
  .hero { padding: 3rem 0 2.4rem; }
  .thesis blockquote { font-size: 1.2rem; }
  .hero-actions { align-items: stretch; flex-direction: column; }
  .hero-actions a { width: 100%; }
  .provenance-grid { grid-template-columns: 1fr; }
  .site-nav { gap: 0 0.25rem; }
  .site-nav a {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    padding: 0 0.35rem;
  }
  .math-block {
    padding: 2rem 1rem 1rem;
    font-size: 1rem;
  }
  .table-scroll table.data { font-size: 0.88rem; }
  .table-scroll table.data th { font-size: 0.8rem; }
  .chart-data table { font-size: 0.82rem; }
  .chart-data thead th { font-size: 0.76rem; }
  .table-scroll > table { font-size: 0.82rem; }
  .table-scroll > table thead th { font-size: 0.74rem; }
  .local-toc ol { grid-template-columns: 1fr; }
  .heading-link { width: 36px; min-height: 36px; opacity: 0.55; }
  .reading-meta { grid-template-columns: 1fr; gap: 0.15rem; }
  .reading-meta dd + dt { margin-top: 0.55rem; }
  .section-nav { grid-template-columns: 1fr; }
  .section-nav a:last-child { justify-content: flex-start; text-align: left; }

  #price-table { overflow-x: visible; padding-top: 0; }
  #price-table .comparison-table,
  #price-table .comparison-table tbody,
  #price-table .comparison-table tr,
  #price-table .comparison-table th,
  #price-table .comparison-table td { display: block; width: 100%; min-width: 0; }
  #price-table .comparison-table thead {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
  }
  #price-table .comparison-table tr {
    margin-bottom: 0.8rem;
    border: 1px solid var(--rule);
    background: rgba(255,255,255,0.28);
  }
  #price-table .comparison-table tbody th {
    padding: 0.65rem 0.75rem;
    border-bottom: 1px solid var(--rule);
    background: var(--paper-deep);
    font-size: 0.88rem;
    font-weight: 500;
  }
  #price-table .comparison-table td {
    display: grid;
    grid-template-columns: minmax(9rem, 1fr) auto;
    gap: 0.8rem;
    padding: 0.55rem 0.75rem;
    text-align: right;
    font-size: 0.88rem;
  }
  #price-table .comparison-table td::before {
    content: attr(data-label);
    color: var(--faint);
    text-align: left;
    font-size: 0.78rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}

@media print {
  @page { margin: 0.65in; }

  body {
    background: #fff;
    color: #000;
    font-size: 11pt;
    line-height: 1.45;
  }
  .site-header,
  .site-footer,
  .skip-link,
  .local-toc,
  .reading-actions,
  .section-nav,
  .heading-link,
  .scroll-cue,
  .panel,
  .seg,
  .btn { display: none !important; }
  .wrap,
  .narrow { max-width: none; padding: 0; }
  main { padding-bottom: 0; }
  .page-head { padding: 0 0 1.2rem; margin: 0 0 1.2rem; }
  .section { padding-top: 1.2rem; }
  .section + .section { margin-top: 1.2rem; }
  h1 { font-size: 24pt; }
  h2 { font-size: 16pt; break-after: avoid-page; }
  h3 { break-after: avoid-page; }
  p, li, .math-block, table, figure { orphans: 3; widows: 3; }
  .math-block {
    overflow: visible;
    border-color: #bbb;
    background: transparent;
    padding: 0.75rem;
    break-inside: avoid-page;
  }
  .math-block .katex { font-size: 0.82em; }
  .table-scroll { overflow: visible; }
  .comparison-table { min-width: 0; }
  table.data { font-size: 8.5pt; }
  table.data th { font-size: 7.5pt; }
  .chart-figure, .note { break-inside: avoid-page; }
  a { color: #000; text-decoration: underline; }
  a[href^="http"]::after { content: " (" attr(href) ")"; font-family: var(--mono); font-size: 7.5pt; }
}