:root {
  /* Scholarly paper-map palette and shared sizing tokens. */
  --bg: #f4f0e7;
  --bg-soft: #ebe4d8;
  --panel: rgba(255, 252, 245, 0.84);
  --panel-strong: #fffaf0;
  --text: #171717;
  --text-dark: #171717;
  --muted: #69645c;
  --line: rgba(38, 34, 28, 0.16);
  --accent: #245f73;
  --accent-dark: #143d4d;
  --warn: #ead29b;
  --solved: #cde8d8;
  --unsolved: #efd1ca;
  --shadow: 0 18px 55px rgba(54, 42, 26, 0.14);
  --radius: 8px;
  --max: 1240px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    linear-gradient(rgba(36, 95, 115, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(36, 95, 115, 0.035) 1px, transparent 1px),
    linear-gradient(180deg, #fbf7ef 0%, var(--bg) 52%, #ece3d3 100%);
  background-size: 32px 32px, 32px 32px, auto;
}

body::selection { background: var(--accent); color: var(--text-dark); }

.grain {
  pointer-events: none;
  position: fixed;
  inset: 0;
  opacity: 0.12;
  background-image: radial-gradient(rgba(33, 28, 20, .28) 0.6px, transparent 0.6px);
  background-size: 28px 28px;
  mask-image: linear-gradient(to bottom, black, transparent 72%);
  z-index: -1;
}

a { color: inherit; text-decoration: none; }

button,
input,
textarea,
select {
  font: inherit;
}

/* Header and top-level navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: var(--max);
  margin: 0 auto;
  padding: 1rem 1.4rem;
  backdrop-filter: blur(22px);
  background: rgba(251, 247, 239, 0.78);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  min-width: 18rem;
}

.brand-logo {
  display: block;
  width: auto;
  height: 3.45rem;
  max-width: min(24rem, 50vw);
  object-fit: contain;
}

.site-header nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.5rem;
  color: var(--muted);
  font-size: 0.94rem;
}

.site-header nav a,
.nav-tab {
  padding: 0.55rem 0.7rem;
  border-radius: 999px;
}

.site-header nav a:hover,
.site-header nav a:focus-visible,
.nav-tab:hover,
.nav-tab:focus-visible,
.nav-tab.active {
  background: rgba(36, 95, 115, 0.08);
  color: var(--text);
  outline: none;
}

.nav-tab {
  border: 0;
  color: inherit;
  background: transparent;
  cursor: pointer;
}

.view-panel {
  display: none;
}

.view-panel.active {
  display: block;
}

.view-panel:not(#overviewView) > .section-shell {
  min-height: calc(100vh - 7rem);
  padding-top: 4rem;
}

/* Shared page shell */
.section-shell {
  width: min(var(--max), calc(100% - 2rem));
  margin: 0 auto;
  padding: 5rem 0;
}

/* Overview hero */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(300px, 0.72fr);
  gap: 1.25rem;
  align-items: stretch;
  padding-top: 3rem;
  padding-bottom: 1.25rem;
}

.hero-copy {
  padding: 3.2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 250, 240, 0.82);
  box-shadow: var(--shadow);
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  text-wrap: pretty;
}

h1,
h2,
h3,
.detail-title-card h3 {
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 540;
}

h1 {
  margin: 0;
  max-width: 15ch;
  font-size: clamp(2.7rem, 5.8vw, 5.2rem);
  line-height: 0.98;
  letter-spacing: 0;
}

.hero-lede {
  max-width: 58rem;
  margin: 1.6rem 0 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 1.6vw, 1.32rem);
  line-height: 1.55;
}

.hero-actions,
.controls,
.filter-buttons,
.card-footer,
.card-tags,
.status-row,
.relation-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.hero-actions { margin-top: 2rem; }

/* Shared button primitive */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.8rem;
  padding: 0.75rem 1rem;
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  font-weight: 720;
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease;
}

.button:hover { transform: translateY(-1px); }

.button.primary {
  color: #fffaf0;
  background: var(--accent);
}

.button.secondary {
  color: var(--text);
  background: rgba(255, 250, 240, 0.7);
  border-color: var(--line);
}

.button.small {
  min-height: 2.35rem;
  font-size: 0.88rem;
}

/* Hero stats and small highlight cards */
.hero-board {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  align-self: stretch;
  align-content: center;
  grid-auto-rows: 1fr;
}

.mini-card {
  min-height: 9.4rem;
  padding: 1.35rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 250, 240, 0.78);
  box-shadow: var(--shadow);
}

.mini-card.tall {
  grid-row: span 2;
  min-height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background:
    linear-gradient(180deg, rgba(36, 95, 115, 0.08), rgba(255, 250, 240, 0.88));
}

.mini-card strong {
  display: block;
  max-width: 100%;
  font-size: clamp(2.85rem, 5vw, 4rem);
  line-height: 0.9;
  letter-spacing: 0;
  overflow-wrap: normal;
  white-space: nowrap;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-variant-numeric: tabular-nums lining-nums;
  font-weight: 680;
}

.mini-card h2 {
  margin: 0.8rem 0 0.7rem;
  font-size: clamp(2.2rem, 4vw, 4rem);
  line-height: 0.95;
  letter-spacing: 0;
}

.mini-card p { margin: 0.8rem 0 0; color: var(--muted); line-height: 1.45; }

.mini-label {
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 760;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.brand-feature {
  padding-top: 0.75rem;
  padding-bottom: 2.5rem;
  min-height: 0;
  overflow: visible;
  display: flex;
  justify-content: center;
}

.brand-feature img {
  display: block;
  width: auto;
  max-width: 100%;
  max-height: calc(100vh - 9rem);
  object-fit: contain;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 250, 240, 0.78);
  box-shadow: var(--shadow);
}

.split-intro {
  display: grid;
  grid-template-columns: 0.8fr 1fr;
  gap: 2rem;
  align-items: start;
  padding-top: 1.5rem;
  padding-bottom: 4rem;
  border-top: 1px solid var(--line);
}

.split-intro h2,
.section-heading h2,
.submit-copy h2 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 4.4rem);
  line-height: 0.96;
  letter-spacing: 0;
}

.split-intro p:last-child {
  margin: 0;
  color: var(--muted);
  font-size: 1.12rem;
  line-height: 1.45;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.section-heading.compact { align-items: center; }

.controls {
  justify-content: flex-end;
}

.search-wrap {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 2.75rem;
  padding: 0.25rem 0.35rem 0.25rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--muted);
  background: rgba(255, 250, 240, 0.72);
}

.search-wrap span {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 760;
}

.search-wrap input {
  width: min(20rem, 42vw);
  border: 0;
  outline: 0;
  color: var(--text);
  background: transparent;
}

.search-wrap input::placeholder { color: rgba(23, 23, 23, 0.42); }

.filter,
.chip,
.status-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.1rem;
  padding: 0.45rem 0.78rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--muted);
  background: rgba(255, 250, 240, 0.76);
  font-size: 0.86rem;
}

.filter { cursor: pointer; }
.filter.active,
.filter:hover {
  color: #fffaf0;
  background: var(--accent);
  border-color: transparent;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.9rem;
}

/* Searchable problem cards */
.problem-card {
  position: relative;
  min-height: 22rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 1.35rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--text);
  background: rgba(255, 250, 240, 0.86);
  box-shadow: 0 12px 34px rgba(54, 42, 26, 0.1);
  cursor: pointer;
  overflow: hidden;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

.problem-card::before {
  content: attr(data-icon);
  position: absolute;
  right: -0.3rem;
  bottom: -1.6rem;
  color: rgba(36, 95, 115, 0.06);
  font-size: 8rem;
  font-weight: 700;
  line-height: 1;
  pointer-events: none;
}

.problem-card:hover,
.problem-card.active {
  transform: translateY(-3px);
  border-color: rgba(36, 95, 115, 0.46);
  background:
    linear-gradient(180deg, rgba(36, 95, 115, 0.1), rgba(255, 250, 240, 0.92));
}

.problem-card h3 {
  position: relative;
  margin: 1.4rem 0 0;
  font-size: clamp(1.28rem, 2vw, 1.82rem);
  line-height: 1.08;
  letter-spacing: 0;
}

.problem-card p {
  position: relative;
  margin: 1rem 0;
  color: var(--muted);
  line-height: 1.45;
}

.formula-line {
  position: relative;
  min-height: 3.5rem;
  display: grid;
  place-items: center;
  margin: 1rem 0 0.2rem;
  padding: 0.65rem 0.55rem;
  border: 1px solid rgba(38, 34, 28, 0.12);
  border-radius: var(--radius);
  color: var(--accent-dark);
  background: rgba(244, 240, 231, 0.72);
  font-size: 0.78rem;
  overflow-wrap: anywhere;
  white-space: normal;
  overflow: hidden;
}

.formula-text {
  max-width: 100%;
  color: var(--accent-dark);
  font-family: "Times New Roman", Georgia, serif;
  font-size: 0.95rem;
  line-height: 1.25;
  text-align: center;
}

.formula-line:empty {
  display: none;
}

.formula-line mjx-container {
  max-width: 100%;
  font-size: 78% !important;
}

.formula-line svg {
  max-width: 100%;
}

.card-footer {
  position: relative;
  justify-content: space-between;
  min-height: 1.45rem;
}

.card-footer span:empty {
  display: none;
}

.status-pill {
  min-height: 1.85rem;
  padding: 0.32rem 0.62rem;
  font-size: 0.78rem;
  font-weight: 780;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.status-pill.unsolved { color: #391010; background: var(--unsolved); border-color: transparent; }
.status-pill.solved { color: #062813; background: var(--solved); border-color: transparent; }
.status-pill.disproved { color: #2e2103; background: var(--warn); border-color: transparent; }

.card-signal {
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 760;
}

/* Modal dossier */
.detail-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: rgba(255, 250, 240, 0.72);
}

.detail-overlay {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: none;
  padding: clamp(0.75rem, 2vw, 1.5rem);
  background: rgba(21, 18, 14, 0.42);
  backdrop-filter: blur(16px);
  overflow-y: auto;
}

.detail-overlay.open {
  display: block;
}

body.modal-open {
  overflow: hidden;
}

.detail-dialog {
  width: min(1320px, 100%);
  margin: 0 auto;
  border: 1px solid rgba(38, 34, 28, 0.18);
  border-radius: var(--radius);
  background: #fbf7ef;
  box-shadow: 0 24px 90px rgba(16, 12, 8, 0.28);
  overflow: hidden;
}

.modal-bar {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.1rem;
  border-bottom: 1px solid var(--line);
  background: rgba(251, 247, 239, 0.94);
  backdrop-filter: blur(14px);
}

.modal-bar > div {
  min-width: 0;
}

.modal-bar .eyebrow {
  margin-bottom: 0.25rem;
}

.modal-bar h2 {
  margin: 0;
  max-width: 34ch;
  font-size: clamp(1.25rem, 2vw, 2rem);
  line-height: 1.08;
  overflow-wrap: anywhere;
}

.icon-button {
  flex: 0 0 auto;
  width: 2.55rem;
  height: 2.55rem;
  display: inline-grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--text);
  background: #fffaf0;
  cursor: pointer;
  font-size: 1.7rem;
  line-height: 1;
}

.detail-hero {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 1rem;
  min-height: 28rem;
  padding: 1rem;
}

.detail-title-card,
.detail-statement-card,
.detail-block,
.taxonomy-card,
.graph-card,
.submit-card,
.source-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 250, 240, 0.82);
}

.detail-title-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 1.4rem;
  background:
    linear-gradient(180deg, rgba(36, 95, 115, 0.1), rgba(255, 250, 240, 0.9));
}

.detail-title-card h3 {
  margin: 1rem 0;
  font-size: clamp(2.5rem, 6vw, 5.5rem);
  line-height: 0.95;
  letter-spacing: 0;
}

.detail-formula {
  margin: 1rem 0;
  padding: 1rem;
  border: 1px solid rgba(38, 34, 28, 0.13);
  border-radius: var(--radius);
  color: var(--accent-dark);
  background: rgba(244, 240, 231, 0.78);
  overflow-x: auto;
}

.detail-title-card p,
.detail-statement-card p,
.detail-block p,
.taxonomy-card p,
.graph-card p,
.submit-copy p,
.source-item p,
.failure-card p,
.result-card p {
  color: var(--muted);
  line-height: 1.52;
}

.detail-statement-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  padding: 1.4rem;
}

.detail-statement-card h4,
.detail-block h4,
.failure-card h4,
.result-card h4,
.graph-card h3,
.source-item h4 {
  margin: 0 0 0.55rem;
  font-size: 1.02rem;
  letter-spacing: -0.02em;
}

.detail-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  padding: 0 1rem 1rem;
}

.detail-block {
  min-width: 0;
  padding: 1.2rem;
}

.detail-block.full { grid-column: 1 / -1; }

.card-list {
  display: grid;
  gap: 0.75rem;
}

.failure-card,
.result-card {
  padding: 1rem;
  border-radius: 20px;
  border: 1px solid rgba(38, 34, 28, 0.12);
  background: rgba(255, 252, 245, 0.72);
}

.failure-card .type {
  display: inline-flex;
  margin-bottom: 0.7rem;
  min-height: 1.65rem;
  align-items: center;
  border-radius: var(--radius);
  padding: 0.28rem 0.55rem;
  color: #2e2103;
  background: var(--warn);
  font-size: 0.74rem;
  font-weight: 780;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.result-card .type {
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 780;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  min-width: 0;
}

.chip {
  max-width: 100%;
  overflow-wrap: anywhere;
}

.relation-list a,
.source-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  border-bottom: 1px solid rgba(167,243,208,0.45);
  color: var(--accent);
}

.inline-sources {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 0.8rem;
  padding-top: 0.75rem;
  border-top: 1px dashed rgba(38, 34, 28, 0.14);
}

.inline-sources span {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 780;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.inline-sources .source-link {
  padding: 0.25rem 0.45rem;
  border: 1px solid rgba(36, 95, 115, 0.18);
  border-radius: 999px;
  background: rgba(36, 95, 115, 0.06);
  font-size: 0.78rem;
  line-height: 1.25;
}

.taxonomy-grid {
  display: grid;
  gap: 1.1rem;
}

.taxonomy-overview {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
  gap: 1rem;
  align-items: start;
}

.taxonomy-brief,
.failure-mode-panel,
.taxonomy-stats article,
.taxonomy-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 250, 240, 0.82);
  box-shadow: var(--shadow);
}

.taxonomy-brief {
  padding: 1.45rem;
}

.taxonomy-brief h3,
.failure-mode-panel h3 {
  margin: 0.6rem 0 0;
  font-size: clamp(1.55rem, 2.6vw, 2.5rem);
  line-height: 1;
}

.taxonomy-brief p {
  max-width: 72ch;
  margin: 1rem 0 0;
  color: var(--muted);
  line-height: 1.45;
}

.taxonomy-stats {
  display: grid;
  gap: 0.75rem;
}

.taxonomy-stats article {
  padding: 1rem;
}

.taxonomy-stats strong {
  display: block;
  margin-top: 0.4rem;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: clamp(2rem, 3vw, 2.9rem);
  line-height: 1;
  font-variant-numeric: tabular-nums lining-nums;
}

.failure-mode-panel {
  display: grid;
  grid-template-columns: minmax(220px, 0.35fr) minmax(0, 0.65fr);
  gap: 1rem;
  padding: 1.2rem;
  align-items: start;
}

.failure-type-list {
  display: grid;
  gap: 0.55rem;
}

.failure-type-row {
  display: grid;
  grid-template-columns: minmax(10rem, 1fr) minmax(8rem, 0.65fr) 3rem;
  gap: 0.65rem;
  align-items: center;
  color: var(--muted);
  font-size: 0.92rem;
}

.failure-type-row div {
  height: 0.48rem;
  border-radius: 999px;
  background: rgba(36, 95, 115, 0.08);
  overflow: hidden;
}

.failure-type-row i {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: rgba(36, 95, 115, 0.7);
}

.failure-type-row strong {
  color: var(--text);
  font-variant-numeric: tabular-nums lining-nums;
}

.taxonomy-subhead {
  margin: 0.75rem 0 0;
  font-size: clamp(1.7rem, 3vw, 3rem);
}

.taxonomy-card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.taxonomy-card { padding: 1.15rem; min-height: 0; }
.taxonomy-card h3 { margin: 0 0 0.75rem; font-size: 1.22rem; line-height: 1.1; letter-spacing: 0; }
.taxonomy-card p { margin: 0; }

.graph-card {
  display: grid;
  grid-template-columns: 0.32fr 0.68fr;
  min-height: 42rem;
  overflow: hidden;
}

.graph-copy {
  padding: 1.4rem;
  border-right: 1px solid var(--line);
}

.graph-copy h3 {
  font-size: clamp(2rem, 4vw, 3.5rem);
  line-height: 0.95;
  letter-spacing: 0;
}

.hint {
  color: var(--accent) !important;
  font-weight: 700;
}

.graph-wrap {
  min-height: 42rem;
  position: relative;
  overflow: hidden;
}

.graph-wrap svg {
  width: 100%;
  height: 100%;
  min-height: 42rem;
  display: block;
}

.graph-node {
  cursor: pointer;
}

.graph-node circle {
  fill: rgba(36, 95, 115, 0.11);
  stroke: rgba(36, 95, 115, 0.62);
  stroke-width: 1.5;
  transition: fill 160ms ease, transform 160ms ease;
}

.graph-node:hover circle,
.graph-node.active circle {
  fill: rgba(36, 95, 115, 0.24);
}

.graph-node text {
  fill: var(--text);
  font-size: 9.6px;
  font-weight: 760;
  text-anchor: middle;
  pointer-events: none;
}

.graph-node .node-icon {
  fill: var(--accent-dark);
  font-size: 10.5px;
}

.graph-node .node-label {
  font-size: 7.4px;
  letter-spacing: -0.02em;
}

.graph-edge {
  stroke: rgba(38, 34, 28, 0.18);
  stroke-width: 1.2;
}

.submit-section {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 1rem;
  align-items: start;
}

.submit-copy {
  padding: 1.4rem 0;
}

.submit-card {
  display: grid;
  gap: 0.9rem;
  padding: 1.2rem;
}

.submit-preview {
  grid-column: 2;
  display: grid;
  gap: 0.9rem;
  padding: 1.15rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(36, 95, 115, 0.07), rgba(255, 250, 240, 0.86));
  box-shadow: var(--shadow);
}

.submit-preview:empty {
  display: none;
}

.submit-preview h3 {
  margin: 0;
  font-size: clamp(1.65rem, 3vw, 2.45rem);
  line-height: 1.05;
}

.submit-preview p {
  margin: 0;
  color: var(--muted);
  line-height: 1.48;
}

.submit-preview-actions,
.export-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.submit-card label {
  display: grid;
  gap: 0.45rem;
  color: var(--muted);
  font-size: 0.87rem;
  font-weight: 680;
}

.submit-card input,
.submit-card textarea,
.submit-card select {
  width: 100%;
  border: 1px solid rgba(38, 34, 28, 0.14);
  border-radius: var(--radius);
  padding: 0.85rem 0.9rem;
  color: var(--text);
  background: rgba(255, 252, 245, 0.78);
  outline: none;
  font-weight: 500;
}

.submit-card textarea {
  min-height: 6rem;
  resize: vertical;
}

.source-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}

.source-item {
  padding: 1rem;
}

.source-item h4 { margin-bottom: 0.45rem; }
.source-item p { margin: 0.35rem 0 0.75rem; font-size: 0.92rem; }
.source-item a { color: var(--accent); border-bottom: 1px solid rgba(167,243,208,0.44); }

.source-mini-list {
  display: grid;
  gap: 0.75rem;
}

.source-mini-card {
  padding: 0.95rem;
  border: 1px solid rgba(38, 34, 28, 0.12);
  border-radius: var(--radius);
  background: rgba(255, 252, 245, 0.72);
}

.source-mini-card h4 {
  margin: 0.45rem 0 0.35rem;
}

.source-mini-card p {
  margin: 0 0 0.6rem;
}

/* Card citations and suggestion mode */
.citation-list {
  display: grid;
  gap: 0.75rem;
}

.citation-card {
  padding: 0.95rem;
  border: 1px solid rgba(38, 34, 28, 0.12);
  border-radius: var(--radius);
  background: rgba(255, 252, 245, 0.76);
}

.citation-topline {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 0.45rem;
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 780;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.citation-index {
  min-width: 1.45rem;
  height: 1.45rem;
  display: inline-grid;
  place-items: center;
  border: 1px solid rgba(36, 95, 115, 0.18);
  border-radius: 999px;
  background: rgba(36, 95, 115, 0.06);
}

.citation-host {
  margin-left: auto;
  color: var(--muted);
  text-transform: none;
  letter-spacing: 0;
  font-weight: 650;
}

.editor-panel {
  display: grid;
  gap: 1rem;
}

.editor-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
}

.editor-grid label {
  display: grid;
  gap: 0.45rem;
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 780;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.editor-grid textarea {
  width: 100%;
  min-height: 7rem;
  resize: vertical;
  border: 1px solid rgba(38, 34, 28, 0.14);
  border-radius: var(--radius);
  padding: 0.8rem;
  color: var(--text);
  background: rgba(255, 252, 245, 0.84);
  font: inherit;
  font-weight: 520;
  line-height: 1.45;
  text-transform: none;
  letter-spacing: 0;
}

.editor-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.editor-preview {
  max-height: 18rem;
  overflow: auto;
  margin: 0;
  padding: 0.9rem;
  border: 1px solid rgba(38, 34, 28, 0.12);
  border-radius: var(--radius);
  color: var(--accent-dark);
  background: rgba(244, 240, 231, 0.72);
  font-size: 0.84rem;
  white-space: pre-wrap;
}

.site-footer {
  width: min(var(--max), calc(100% - 2rem));
  margin: 0 auto;
  padding: 2rem 0 3rem;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.site-footer p { margin: 0.35rem 0; }

/* Scholarly dossier and navigation polish */
.featured-section {
  padding-top: 2.25rem;
  padding-bottom: 2.5rem;
}

.featured-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.9rem;
}

.featured-card {
  padding: 1.15rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 250, 240, 0.82);
  box-shadow: 0 12px 34px rgba(54, 42, 26, 0.08);
}

.featured-card {
  min-height: 26rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  cursor: pointer;
  overflow: hidden;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

.featured-card-image {
  width: calc(100% + 2.3rem);
  max-width: none;
  height: 11rem;
  margin: -1.15rem -1.15rem 1rem;
  display: block;
  object-fit: cover;
  object-position: center;
  border-bottom: 1px solid var(--line);
  filter: saturate(0.92) contrast(0.98);
}

.featured-card:hover,
.featured-card:focus-visible {
  transform: translateY(-2px);
  border-color: rgba(36, 95, 115, 0.42);
  outline: none;
  background: rgba(255, 252, 245, 0.94);
}

.featured-card h3 {
  margin: 0.85rem 0 0.7rem;
  font-size: clamp(1.45rem, 2.4vw, 2.15rem);
  line-height: 1.04;
}

.featured-card p {
  color: var(--muted);
  line-height: 1.45;
}

/* Problem dossier layout */
.detail-dossier {
  display: grid;
  grid-template-columns: minmax(250px, 310px) minmax(0, 1fr);
  gap: 1rem;
  padding: 1rem;
}

.detail-dossier-sidebar {
  min-width: 0;
  position: sticky;
  top: 1rem;
  align-self: start;
  display: grid;
  gap: 1rem;
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(36, 95, 115, 0.08), rgba(255, 250, 240, 0.92));
}

.detail-dossier-sidebar h3 {
  margin: 0;
  max-width: 100%;
  font-size: clamp(1.65rem, 2.4vw, 2.7rem);
  line-height: 1.02;
  overflow-wrap: anywhere;
  hyphens: auto;
}

.detail-dossier-sidebar p {
  max-width: 100%;
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
  overflow-wrap: anywhere;
}

.detail-dossier-main {
  min-width: 0;
  display: grid;
  gap: 1rem;
}

.detail-tabs {
  position: sticky;
  top: 0;
  z-index: 2;
  align-self: start;
  min-height: 0;
  height: fit-content;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.3rem;
  padding: 0.35rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 250, 240, 0.92);
  backdrop-filter: blur(12px);
}

.detail-tab {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.35rem;
  max-height: 2.35rem;
  border: 1px solid transparent;
  border-radius: calc(var(--radius) - 2px);
  padding: 0.42rem 0.62rem;
  color: var(--muted);
  background: transparent;
  cursor: pointer;
  font-size: 0.92rem;
  line-height: 1.2;
}

.detail-tab.active,
.detail-tab:hover,
.detail-tab:focus-visible {
  color: var(--text);
  background: rgba(36, 95, 115, 0.08);
  outline: none;
}

.detail-tab-panel {
  display: none;
}

.detail-tab-panel.active {
  display: grid;
  gap: 1rem;
}

.detail-card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  min-width: 0;
}

.detail-graph-jump {
  width: fit-content;
}

.graph-search {
  margin-left: auto;
}

.source-controls {
  display: grid;
  grid-template-columns: minmax(280px, 1fr) minmax(220px, 0.32fr);
  gap: 1rem;
  align-items: end;
  margin-bottom: 1rem;
}

.source-controls .control-group {
  display: grid;
  gap: 0.4rem;
  color: var(--muted);
  font-weight: 700;
  font-size: 0.83rem;
}

/* Responsive layout */
@media (max-width: 980px) {
  .site-header { align-items: flex-start; }
  .site-header nav { display: none; }
  .hero,
  .split-intro,
  .detail-hero,
  .detail-body,
  .graph-card,
  .submit-section { grid-template-columns: 1fr; }
  .submit-preview { grid-column: auto; }
  .hero-copy { padding: 2rem; }
  .problem-grid,
  .taxonomy-grid,
  .source-list,
  .featured-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .detail-statement-card { grid-template-columns: 1fr; }
  .detail-dossier,
  .detail-card-grid,
  .source-controls { grid-template-columns: 1fr; }
  .detail-dossier-sidebar { position: static; }
  .modal-bar h2 { max-width: 26ch; }
  .graph-copy { border-right: 0; border-bottom: 1px solid var(--line); }
}

@media (max-width: 660px) {
  .section-shell { width: min(100% - 1rem, var(--max)); padding: 3.3rem 0; }
  .hero { padding-top: 1rem; padding-bottom: 1rem; }
  .detail-overlay { padding: 0.5rem; }
  .modal-bar { align-items: flex-start; }
  .modal-bar h2 { font-size: 1.25rem; }
  .detail-dossier { padding: 0.65rem; gap: 0.65rem; }
  .detail-dossier-sidebar { padding: 0.9rem; }
  .detail-dossier-sidebar h3 { font-size: clamp(1.45rem, 10vw, 2.2rem); }
  .detail-tabs { position: static; }
  .hero-copy { border-radius: var(--radius); padding: 1.25rem; }
  .hero-board,
  .problem-grid,
  .taxonomy-grid,
  .source-list,
  .featured-grid { grid-template-columns: 1fr; }
  .mini-card.tall { min-height: 18rem; }
  .section-heading { align-items: stretch; flex-direction: column; }
  .controls { justify-content: flex-start; }
  .search-wrap { width: 100%; }
  .search-wrap input { width: 100%; }
  h1 { font-size: clamp(2.45rem, 12vw, 4.2rem); }
}

.review-mini {
  margin-top: 1rem;
  padding: 0.85rem 0.95rem;
  border: 1px solid rgba(36, 95, 115, 0.18);
  border-radius: var(--radius);
  background: rgba(255, 250, 240, 0.72);
  display: grid;
  gap: 0.35rem;
  color: var(--muted);
}

.review-mini strong {
  color: var(--accent-dark);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.review-mini span {
  color: var(--text);
  font-weight: 720;
}

.review-mini em {
  font-style: normal;
  font-size: 0.84rem;
}

.source-meta {
  display: grid;
  gap: 0.3rem;
  margin: 0.65rem 0 0.85rem;
  color: var(--muted);
  font-size: 0.82rem;
}

.source-meta span:first-child {
  width: fit-content;
  padding: 0.22rem 0.5rem;
  border: 1px solid rgba(36, 95, 115, 0.18);
  border-radius: 999px;
  color: var(--accent-dark);
  background: rgba(36, 95, 115, 0.06);
  font-size: 0.72rem;
  font-weight: 760;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.hero-summary {
  max-width: 70ch;
  margin: 1.4rem 0 0;
  color: var(--muted);
  font-size: 1.03rem;
  line-height: 1.6;
}

.section-card,
/* Graph controls and legends */
.graph-controls {
  padding: 1rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 250, 240, 0.78);
  box-shadow: var(--shadow);
}

/* Domain showcase on the overview page */
.category-showcase {
  display: grid;
  gap: 1.25rem;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.category-card {
  overflow: hidden;
  border: 1px solid rgba(32, 44, 52, 0.12);
  border-radius: 1rem;
  background: rgba(255, 252, 245, 0.78);
  box-shadow: var(--shadow);
}

.category-media {
  display: block;
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
}

.category-copy {
  display: grid;
  gap: 0.9rem;
  padding: 1rem 1rem 1.2rem;
}

.meta-row {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  flex-wrap: wrap;
}

.category-stat,
.results-meta {
  color: var(--muted);
  font-size: 0.93rem;
}

.filter-stack {
  display: grid;
  gap: 0.8rem;
  margin-bottom: 0.85rem;
}

.domain-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  border-radius: 999px;
  padding: 0.32rem 0.68rem;
  font-size: 0.76rem;
  letter-spacing: 0.02em;
  border: 1px solid rgba(32, 44, 52, 0.12);
  background: rgba(255,255,255,0.7);
}

.domain-pill.math,
.legend-dot.math,
.graph-node.math,
.attempt-center.math circle,
.domain-filter.active[data-domain="math"] {
  color: #245f73;
}

.domain-pill.cs,
.legend-dot.cs,
.graph-node.cs,
.attempt-center.cs circle,
.domain-filter.active[data-domain="cs"] {
  color: #2e685b;
}

.domain-pill.physics,
.legend-dot.physics,
.graph-node.physics,
.attempt-center.physics circle,
.domain-filter.active[data-domain="physics"] {
  color: #866527;
}

.status-row .domain-pill {
  margin-left: auto;
}

.coverage-strip {
  display: flex;
  gap: 0.65rem;
  flex-wrap: wrap;
}

.coverage-strip span {
  padding: 0.44rem 0.7rem;
  border-radius: 999px;
  background: rgba(36, 95, 115, 0.07);
  font-size: 0.88rem;
}

.coverage-strip.compact span {
  font-size: 0.84rem;
}

.graph-controls {
  display: flex;
  gap: 1rem;
  align-items: end;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.control-group {
  display: grid;
  gap: 0.35rem;
}

.control-group label,
.toggle-wrap {
  color: var(--muted);
  font-size: 0.92rem;
}

.control-group select {
  min-width: 13rem;
}

.toggle-wrap {
  display: inline-flex;
  gap: 0.5rem;
  align-items: center;
}

.graph-stack {
  display: grid;
  gap: 1.25rem;
}

.graph-legend {
  display: flex;
  gap: 0.85rem;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0.75rem 0 0.35rem;
}

.legend-dot,
.legend-line {
  display: inline-block;
  vertical-align: middle;
  margin-right: 0.35rem;
}

.legend-dot {
  width: 0.8rem;
  height: 0.8rem;
  border-radius: 999px;
  border: 1px solid rgba(32, 44, 52, 0.16);
  background: currentColor;
}

.legend-line {
  width: 1.3rem;
  height: 0;
  border-top-width: 2px;
  border-top-style: solid;
}

.legend-line.explicit { border-color: rgba(30, 57, 85, 0.45); }
.legend-line.shared { border-color: rgba(122, 92, 39, 0.45); border-top-style: dashed; }

.graph-wrap.mega { min-height: 760px; }
.graph-wrap.attempt { min-height: 560px; }

.domain-zone {
  fill: rgba(36, 95, 115, 0.05);
  stroke: rgba(36, 95, 115, 0.08);
}

.domain-zone.cs { fill: rgba(46, 104, 91, 0.05); stroke: rgba(46, 104, 91, 0.08); }
.domain-zone.physics { fill: rgba(134, 101, 39, 0.05); stroke: rgba(134, 101, 39, 0.08); }

.zone-label {
  fill: rgba(31, 45, 54, 0.78);
  font-size: 26px;
  text-anchor: middle;
  letter-spacing: 0.08em;
  font-family: Georgia, "Times New Roman", serif;
}

.graph-edge {
  stroke-width: 1.3;
  opacity: 0.92;
}

.graph-edge.explicit { stroke: rgba(33, 61, 86, 0.16); }
.graph-edge.shared { stroke: rgba(122, 92, 39, 0.18); stroke-dasharray: 4 4; }
.graph-edge.active { stroke-width: 2.1; stroke-opacity: 0.6; }

.graph-node {
  cursor: pointer;
}

.graph-node circle {
  fill: currentColor;
  stroke: rgba(22, 32, 38, 0.16);
  stroke-width: 1.2;
}

.graph-node.solved circle { stroke: #2f7a57; stroke-width: 1.9; }
.graph-node.disproved circle { stroke: #9a5a4e; stroke-width: 1.9; }
.graph-node.active circle { stroke: rgba(20, 28, 34, 0.92); stroke-width: 2.5; }

.node-label {
  display: none;
  text-anchor: middle;
  font-size: 11px;
  fill: rgba(17, 23, 28, 0.96);
}

.graph-node:hover .node-label,
.graph-node.active .node-label,
.graph-node.show-labels .node-label { display: block; }

.attempt-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(280px, 0.8fr);
  gap: 1rem;
  align-items: start;
}

.attempt-inspector {
  min-height: 560px;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 252, 245, 0.78);
  box-shadow: var(--shadow);
}

.inspector-card {
  display: grid;
  gap: 0.85rem;
}

.inspector-card h4 {
  margin: 0;
  font-size: 1.38rem;
}

.attempt-group-label {
  text-anchor: middle;
  font-size: 19px;
  fill: rgba(31, 45, 54, 0.76);
  font-family: Georgia, "Times New Roman", serif;
}

.attempt-edge {
  stroke-width: 2;
  opacity: 0.95;
}
.attempt-edge.method { stroke: rgba(36, 95, 115, 0.3); }
.attempt-edge.partial { stroke: rgba(46, 104, 91, 0.34); }
.attempt-edge.failure { stroke: rgba(150, 95, 76, 0.38); }
.attempt-edge.problem-neighbor { stroke: rgba(134, 101, 39, 0.32); stroke-dasharray: 5 5; }

.attempt-center circle {
  fill: rgba(255,255,255,0.9);
  stroke: rgba(28, 42, 50, 0.22);
  stroke-width: 1.4;
}

.attempt-center-title,
.attempt-center-subtitle {
  text-anchor: middle;
  fill: rgba(24, 36, 42, 0.94);
}
.attempt-center-title { font-size: 20px; font-weight: 600; }
.attempt-center-subtitle { font-size: 13px; }

.attempt-node { cursor: pointer; }
.attempt-node rect {
  fill: rgba(255,255,255,0.88);
  stroke: rgba(31, 45, 54, 0.16);
  stroke-width: 1.2;
}
.attempt-node.method rect { fill: rgba(230, 239, 244, 0.9); }
.attempt-node.partial rect { fill: rgba(231, 244, 236, 0.92); }
.attempt-node.failure rect { fill: rgba(246, 236, 231, 0.92); }
.attempt-node.problem-neighbor rect { fill: rgba(244, 239, 226, 0.92); }
.attempt-node:hover rect,
.attempt-node:focus rect { stroke: rgba(24, 36, 42, 0.5); stroke-width: 2; }
.attempt-node-label {
  text-anchor: middle;
  font-size: 12.8px;
  fill: rgba(24, 36, 42, 0.92);
}

.results-meta { margin: 0 0 0.5rem; }

.editorial-rule { grid-column: span 2; }


@media (max-width: 1080px) {
  .category-grid,
  .attempt-layout {
    grid-template-columns: 1fr;
  }

  .graph-wrap.mega { min-height: 620px; }
  .graph-wrap.attempt,
  .attempt-inspector { min-height: 420px; }

  .editorial-rule { grid-column: auto; }
}

@media (max-width: 720px) {
  .graph-controls,
  .meta-row { gap: 0.6rem; }
  .control-group select { min-width: 10rem; }
}

/* --- Final interactive graph / domain / timeline additions --- */
.force-card code {
  padding: 0.1rem 0.35rem;
  border-radius: 0.35rem;
  background: rgba(36, 95, 115, 0.08);
}

.force-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
  align-items: center;
  margin: 1rem 0;
  color: var(--muted);
}

.force-controls label {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.force-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(280px, 0.72fr);
  gap: 1rem;
  align-items: start;
}

.graph-wrap.force {
  min-height: 620px;
}

.force-svg {
  width: 100%;
  min-height: 620px;
  cursor: default;
}

.force-edge {
  stroke: rgba(36, 95, 115, 0.18);
  stroke-width: 1.4;
}

.force-edge.has_failure,
.force-edge.blocks_method {
  stroke: rgba(149, 84, 69, 0.35);
}

.force-edge.has_result {
  stroke: rgba(46, 104, 91, 0.35);
}

.force-edge.cites {
  stroke: rgba(99, 91, 77, 0.22);
  stroke-dasharray: 4 4;
}

.force-node {
  cursor: grab;
}

.force-node:active {
  cursor: grabbing;
}

.force-node circle {
  stroke: rgba(24, 34, 40, 0.28);
  stroke-width: 1.4;
  fill: rgba(36, 95, 115, 0.72);
}

.force-node.problem circle,
.legend-node.problem { fill: rgba(36, 95, 115, 0.88); }
.force-node.method circle,
.legend-node.method { fill: rgba(78, 105, 130, 0.78); }
.force-node.result circle,
.legend-node.result { fill: rgba(47, 122, 87, 0.8); }
.force-node.failure circle,
.legend-node.failure { fill: rgba(150, 88, 73, 0.84); }
.force-node.source circle,
.legend-node.source { fill: rgba(138, 121, 89, 0.8); }

.force-node.active circle {
  stroke: rgba(20, 28, 34, 0.9);
  stroke-width: 2.8;
}

.force-node text {
  display: none;
  text-anchor: middle;
  font-size: 12px;
  fill: rgba(18, 25, 31, 0.92);
}

.force-node:hover text,
.force-node.active text,
.force-node:focus text {
  display: block;
}

.legend-node {
  display: inline-block;
  width: 0.85rem;
  height: 0.85rem;
  border-radius: 999px;
  margin-right: 0.35rem;
  border: 1px solid rgba(24, 34, 40, 0.18);
  vertical-align: middle;
}

.force-node-card.problem { border-left: 4px solid rgba(36, 95, 115, 0.85); padding-left: 1rem; }
.force-node-card.method { border-left: 4px solid rgba(78, 105, 130, 0.85); padding-left: 1rem; }
.force-node-card.result { border-left: 4px solid rgba(47, 122, 87, 0.85); padding-left: 1rem; }
.force-node-card.failure { border-left: 4px solid rgba(150, 88, 73, 0.85); padding-left: 1rem; }
.force-node-card.source { border-left: 4px solid rgba(138, 121, 89, 0.85); padding-left: 1rem; }

.timeline-section .timeline-filters {
  margin-bottom: 1.5rem;
}

.timeline-intro {
  margin-bottom: 1rem;
  padding: 1.2rem;
}

.timeline-intro h3 {
  margin: 0 0 0.45rem;
  font-size: clamp(1.35rem, 2.2vw, 2rem);
}

.timeline-intro p {
  max-width: 78rem;
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
}

/* Timeline cards */
.timeline-grid {
  position: relative;
  display: grid;
  gap: 1rem;
  padding-left: 1.4rem;
}

.timeline-grid::before {
  content: "";
  position: absolute;
  top: 0.4rem;
  bottom: 0.4rem;
  left: 0.35rem;
  width: 1px;
  background: rgba(36, 95, 115, 0.26);
}

.timeline-card {
  position: relative;
  padding: 1.2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 250, 240, 0.82);
  box-shadow: var(--shadow);
}

.timeline-card::before {
  content: "";
  position: absolute;
  left: -1.72rem;
  top: 1.55rem;
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 0 5px rgba(36, 95, 115, 0.1);
}

.timeline-card.cs::before { background: #2e685b; }
.timeline-card.physics::before { background: #866527; }

.timeline-year {
  display: inline-block;
  margin-bottom: 0.45rem;
  color: var(--accent);
  font-weight: 800;
  letter-spacing: 0.04em;
}

.timeline-card h3 {
  margin: 0 0 0.45rem;
}

.timeline-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0.8rem 0;
}

.timeline-problem-chip {
  border: 1px solid rgba(36, 95, 115, 0.18);
  border-radius: 999px;
  padding: 0.32rem 0.6rem;
  color: var(--accent-dark);
  background: rgba(36, 95, 115, 0.06);
  cursor: pointer;
}

.domain-page-main .domain-hero {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 1.1fr);
  gap: 1rem;
  align-items: center;
}

.domain-hero-copy {
  padding: 2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 250, 240, 0.84);
  box-shadow: var(--shadow);
}

.domain-hero-copy h1 {
  max-width: 12ch;
  margin-bottom: 1rem;
}

.domain-hero-image {
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.domain-stat-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.domain-stat {
  padding: 1.2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 250, 240, 0.78);
  box-shadow: var(--shadow);
}

.domain-stat strong {
  display: block;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 2.2rem;
  font-weight: 500;
}

.domain-list-heading {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: end;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

@media (max-width: 1080px) {
  .force-layout,
  .domain-page-main .domain-hero {
    grid-template-columns: 1fr;
  }

  .domain-stat-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .domain-stat-grid {
    grid-template-columns: 1fr;
  }

  .force-controls {
    align-items: flex-start;
    flex-direction: column;
  }
}

/* --- Force graph v2 / timeline item compatibility --- */
.force-edge.tried_method,
.force-edge.method_used_by { stroke: rgba(36, 95, 115, 0.28); }
.force-edge.partial_success { stroke: rgba(47, 122, 87, 0.35); }
.force-edge.blocked_by { stroke: rgba(150, 88, 73, 0.38); }
.force-edge.supported_by,
.force-edge.cited_source { stroke: rgba(138, 121, 89, 0.25); stroke-dasharray: 4 4; }
.force-edge.curated_relation { stroke: rgba(35, 53, 68, 0.34); stroke-width: 2; }
.force-node.cross-domain circle { stroke: rgba(36, 95, 115, 0.95); stroke-width: 2; }
.force-inspector .source-link { width: fit-content; }
.timeline-grid .timeline-item {
  position: relative;
  padding: 1.2rem 1.2rem 1.2rem 1.45rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 250, 240, 0.78);
  box-shadow: var(--shadow);
}
.timeline-grid .timeline-item::before {
  content: "";
  position: absolute;
  left: -0.34rem;
  top: 1.4rem;
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(36, 95, 115, 0.09);
}
.timeline-grid .timeline-item.cs::before { background: #2e685b; }
.timeline-grid .timeline-item.physics::before { background: #866527; }
.timeline-grid .timeline-item h3 { margin: .45rem 0 .5rem; }
.timeline-grid .timeline-item .button { margin-top: .8rem; }
.force-svg, .graph-wrap svg { touch-action: none; }

.timeline-item {
  position: relative;
  padding: 1.2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 250, 240, 0.82);
  box-shadow: var(--shadow);
}
.timeline-item::before {
  content: "";
  position: absolute;
  left: -1.72rem;
  top: 1.55rem;
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 0 5px rgba(36, 95, 115, 0.1);
}
.timeline-item.cs::before { background: #2e685b; }
.timeline-item.physics::before { background: #866527; }
.timeline-item h3 { margin: 0 0 0.45rem; }
.domain-filter,
.domain-status-filter,
.timeline-filter {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.55rem 0.85rem;
  background: rgba(255, 250, 240, 0.65);
  cursor: pointer;
  color: var(--muted);
}
.domain-filter.active,
.domain-status-filter.active,
.timeline-filter.active {
  color: var(--text);
  background: rgba(36, 95, 115, 0.1);
}

/* First-class graph, timeline, and domain-page additions */
.force-controls {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 0.9rem 0;
  color: var(--muted);
  font-size: 0.92rem;
}
.force-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(280px, 0.75fr);
  gap: 1rem;
  align-items: start;
}
.graph-wrap.force {
  min-height: 620px;
  overflow: hidden;
}
.force-svg {
  width: 100%;
  height: 100%;
  min-height: 620px;
  display: block;
}
.force-edge {
  stroke: rgba(46, 57, 63, 0.18);
  stroke-width: 1.3;
}
.force-edge.uses_method { stroke: rgba(36, 95, 115, 0.25); }
.force-edge.partial_success { stroke: rgba(46, 104, 91, 0.28); }
.force-edge.blocked_by { stroke: rgba(148, 82, 66, 0.3); }
.force-edge.cites,
.force-edge.cites_statement { stroke: rgba(70, 70, 70, 0.15); stroke-dasharray: 4 4; }
.force-node { cursor: grab; }
.force-node:active { cursor: grabbing; }
.force-node circle {
  fill: rgba(255,255,255,0.92);
  stroke: rgba(31,45,54,0.35);
  stroke-width: 1.4;
}
.force-node.problem circle { fill: rgba(36,95,115,0.18); stroke: rgba(36,95,115,0.75); }
.force-node.method circle { fill: rgba(68,112,153,0.16); stroke: rgba(68,112,153,0.65); }
.force-node.result circle { fill: rgba(46,104,91,0.18); stroke: rgba(46,104,91,0.68); }
.force-node.failure circle { fill: rgba(150,95,76,0.18); stroke: rgba(150,95,76,0.72); }
.force-node.source circle { fill: rgba(115,115,115,0.16); stroke: rgba(85,85,85,0.55); }
.force-node.active circle { stroke: rgba(20,25,29,0.9); stroke-width: 2.5; }
.force-node text {
  display: none;
  text-anchor: middle;
  font-size: 12px;
  fill: rgba(20,28,34,0.95);
  pointer-events: none;
}
.force-node:hover text,
.force-node.active text { display: block; }
.legend-node {
  display: inline-block;
  width: 0.8rem;
  height: 0.8rem;
  border-radius: 999px;
  margin-right: 0.35rem;
  vertical-align: middle;
  border: 1px solid rgba(31,45,54,0.2);
}
.legend-node.problem { background: rgba(36,95,115,0.3); }
.legend-node.method { background: rgba(68,112,153,0.25); }
.legend-node.result { background: rgba(46,104,91,0.25); }
.legend-node.failure { background: rgba(150,95,76,0.25); }
.legend-node.source { background: rgba(115,115,115,0.25); }
.force-inspector { min-height: 620px; }
.timeline-filters { margin-bottom: 1rem; }
.timeline-grid {
  display: grid;
  gap: 1rem;
}
.timeline-item {
  display: grid;
  grid-template-columns: 8rem minmax(0, 1fr);
  gap: 1rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255,250,240,0.78);
  box-shadow: var(--shadow);
  cursor: pointer;
}
.timeline-year {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.4rem;
  color: var(--accent);
}
.timeline-content h3 {
  margin: 0.65rem 0 0.35rem;
}
.domain-hero {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(340px, 1.05fr);
  gap: 1.25rem;
  align-items: center;
  padding-top: 2.5rem;
  padding-bottom: 2.5rem;
}
.domain-hero .hero-copy {
  align-self: stretch;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(1.4rem, 3vw, 2.25rem);
}
.domain-hero .hero-copy h1 {
  max-width: 11ch;
  margin-bottom: 1.4rem;
}
.domain-hero img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1672 / 941;
  object-fit: contain;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: rgba(255, 250, 240, 0.8);
  box-shadow: var(--shadow);
}
/* Dedicated domain pages */
.domain-layout {
  display: grid;
  gap: 1.25rem;
}

.domain-layout .section-shell {
  padding: 3.2rem 0;
}
.domain-mini-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 1rem;
}

.domain-mini-grid .mini-card {
  min-width: 0;
}

.domain-mini-grid .mini-card strong {
  font-size: clamp(2rem, 2.6vw, 2.35rem);
  line-height: 1;
}

.domain-mini-grid .mini-label {
  overflow-wrap: anywhere;
}

#domainGraph {
  min-height: 44rem;
  width: 100%;
  grid-column: 1 / -1;
}

#domainGraph svg {
  width: 100%;
  height: 100%;
  min-height: 44rem;
  display: block;
}

.domain-layout .graph-card:has(#domainGraph) {
  display: block;
}

#domainGraph .force-node text,
#domainGraph .force-node.show-labels text {
  display: block;
  font-size: 10px;
}
@media (max-width: 1080px) {
  .force-layout,
  .domain-hero,
  .domain-mini-grid { grid-template-columns: 1fr; }
  .force-inspector { min-height: auto; }
}
@media (max-width: 720px) {
  .timeline-item { grid-template-columns: 1fr; }
}

/* Bridge graph expansion */
.legend-node.bridge,
.force-node.bridge circle {
  fill: rgba(126, 85, 151, 0.18);
  stroke: rgba(94, 62, 126, 0.78);
}
.force-node.bridge text {
  fill: rgba(54, 36, 70, 0.94);
}
.force-node-card.bridge {
  border-left: 4px solid rgba(94, 62, 126, 0.85);
  padding-left: 1rem;
}
.force-edge.bridged_by,
.force-edge.method_family,
.force-edge.partial_under_bridge,
.force-edge.failure_under_bridge {
  stroke: rgba(94, 62, 126, 0.22);
  stroke-dasharray: 5 5;
}
.force-edge.cross_field_bridge {
  stroke: rgba(94, 62, 126, 0.3);
  stroke-width: 2;
}
.bridge-toolbar {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: center;
  margin-top: 0.8rem;
}
.bridge-toolbar label {
  color: var(--muted);
  font-size: 0.93rem;
}
.bridge-toolbar select {
  min-width: 18rem;
  margin-left: 0.5rem;
}
.bridge-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.9fr);
  gap: 1rem;
  align-items: start;
}
.bridge-family-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
  max-height: 760px;
  overflow: auto;
  padding-right: 0.25rem;
}
.bridge-family-card {
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 250, 240, 0.72);
  cursor: pointer;
  transition: border-color 160ms ease, transform 160ms ease, background 160ms ease;
}
.bridge-family-card:hover,
.bridge-family-card:focus,
.bridge-family-card.active {
  outline: none;
  transform: translateY(-1px);
  border-color: rgba(94, 62, 126, 0.42);
  background: rgba(250, 246, 255, 0.8);
}
.bridge-family-card h4 {
  margin: 0 0 0.55rem;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.18rem;
}
.bridge-family-card p,
.bridge-linked-problem p {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.45;
}
.bridge-linked-list {
  display: grid;
  gap: 0.65rem;
  margin-top: 0.5rem;
  max-height: 520px;
  overflow: auto;
  padding-right: 0.2rem;
}
.bridge-linked-problem {
  padding: 0.85rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.55);
  cursor: pointer;
}
.bridge-linked-problem:hover,
.bridge-linked-problem:focus {
  outline: none;
  border-color: rgba(36, 95, 115, 0.36);
  background: rgba(255, 255, 255, 0.78);
}
.bridge-linked-problem h4 {
  margin: 0.6rem 0 0.35rem;
  font-size: 1rem;
}
.bridge-chip-list {
  display: grid;
  gap: 0.45rem;
  margin-top: 0.75rem;
}
.bridge-problem-chip {
  display: flex;
  justify-content: space-between;
  gap: 0.7rem;
  width: 100%;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255,255,255,0.65);
  cursor: pointer;
  color: inherit;
}
.bridge-problem-chip em {
  color: var(--muted);
  font-style: normal;
  font-size: 0.8rem;
}
.bridge-problem-chip:hover,
.bridge-problem-chip:focus {
  outline: none;
  border-color: rgba(94, 62, 126, 0.42);
}
@media (max-width: 1100px) {
  .bridge-layout { grid-template-columns: 1fr; }
  .bridge-family-grid { grid-template-columns: 1fr; max-height: none; }
}

/* Runtime-imported open-problem cards */
.ulam-hero h1 { max-width: 16ch; }
.ulam-controls-shell { padding-top: 3rem; }
.ulam-filter-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(150px, 1fr));
  gap: 0.9rem;
  margin: 1rem 0;
}
.ulam-filter-grid label,
.control-group {
  display: grid;
  gap: 0.35rem;
  color: var(--muted);
  font-size: 0.92rem;
}
.ulam-filter-grid select,
.control-group select {
  min-height: 2.75rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.55rem 0.7rem;
  background: rgba(255, 250, 240, 0.82);
  color: var(--text);
}
.ulam-card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}
.ulam-import-card .mini-label { margin-bottom: 0.55rem; }
.small-chips .chip { font-size: 0.78rem; }
.ulam-statement {
  white-space: pre-wrap;
  font-size: 1.02rem;
  line-height: 1.55;
}
.ulam-graph-wrap { min-height: 780px; }
.graph-node.category circle,
.graph-node.set circle {
  fill: rgba(36, 95, 115, 0.72);
  stroke: rgba(20, 32, 38, 0.26);
}
.graph-node.family circle {
  fill: rgba(134, 101, 39, 0.78);
  stroke: rgba(20, 32, 38, 0.26);
}
.graph-node.math circle { fill: #245f73; }
.graph-node.cs circle { fill: #2e685b; }
.graph-node.physics circle { fill: #866527; }
.graph-node.ulam-node circle { cursor: pointer; }
.graph-node.ulam-node.active circle {
  stroke: #171717;
  stroke-width: 2.5;
}
.results-meta { margin: 0 0 0.8rem; }
.editorial-rule { grid-column: span 2; }
@media (max-width: 1060px) {
  .ulam-card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .ulam-filter-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 720px) {
  .ulam-card-grid,
  .ulam-filter-grid { grid-template-columns: 1fr; }
  .ulam-graph-wrap { min-height: 520px; }
}

/* Ulam triangulated-source upgrade */
.source-triangulation {
  display: grid;
  gap: 0.55rem;
  margin-top: 0.65rem;
}

.inline-sources.provenance-links span,
.inline-sources.independent-links span,
.inline-sources.extracted-links span {
  min-width: 8.5rem;
}

.inline-sources.independent-links {
  background: rgba(36, 95, 115, 0.035);
  border-color: rgba(36, 95, 115, 0.16);
}

.inline-sources.extracted-links {
  background: rgba(134, 101, 39, 0.035);
  border-color: rgba(134, 101, 39, 0.16);
}

.extracted-ref {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 0.82rem;
}

.source-search-panel {
  display: grid;
  gap: 1rem;
  padding: 1rem;
  border: 1px solid rgba(36, 95, 115, 0.18);
  border-radius: var(--radius);
  background: rgba(255, 250, 240, 0.76);
}

.source-search-panel h4 {
  margin: 0.35rem 0 0.35rem;
  font-size: 1.35rem;
}

.independent-results {
  display: grid;
  gap: 0.75rem;
}

.openalex-results {
  display: grid;
  gap: 0.7rem;
}

.source-result-card {
  padding: 0.85rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255,255,255,0.68);
}

.source-result-card h5 {
  margin: 0 0 0.35rem;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.02rem;
}

.source-result-card p {
  margin: 0 0 0.55rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.failure-note {
  padding: 0.8rem;
  border-radius: var(--radius);
  background: rgba(239, 209, 202, 0.45);
  border: 1px solid rgba(150, 95, 76, 0.16);
}

.independent-source-block {
  order: -1;
}

@media (max-width: 760px) {
  .editor-grid {
    grid-template-columns: 1fr;
  }

  .citation-host {
    margin-left: 0;
    width: 100%;
  }
}

.quality-audit-card {
  border-color: rgba(36, 95, 115, 0.22) !important;
  background: linear-gradient(180deg, rgba(36, 95, 115, 0.06), rgba(255, 250, 240, 0.78)) !important;
}

.quality-audit-card p {
  margin: 0.65rem 0 0;
}