:root {
  --text-primary: #171717;
  --text-secondary: #4b5563;
  --text-muted: #6b7280;
  --background-primary: #ffffff;
  --background-secondary: #f6f7f9;
  --border-color: #d9dde3;
  --accent: #1f6feb;
  --accent-dark: #174ea6;
  --evidence: #0f766e;
  --warning: #9a3412;
  --shadow: 0 10px 28px rgb(15 23 42 / 0.08);
  --radius: 8px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Noto Sans", "Google Sans", Arial, sans-serif;
  color: var(--text-primary);
  background: var(--background-primary);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a:hover {
  color: var(--accent-dark);
  text-decoration: underline;
}

.hero-body,
.section {
  padding: 3.5rem 1.5rem;
}

.hero.is-light,
.section.hero.is-light {
  background: var(--background-secondary);
}

.cluster-band {
  background: #ffffff;
}

.causal-band {
  background: #f2f3f5;
  border-top: 1px solid #d7dbe0;
  border-bottom: 1px solid #d7dbe0;
}

.caveat-band {
  background: #f6f7f9;
  border-top: 1px solid #d7dbe0;
}

.publication-hero .hero-body {
  padding-top: 4.5rem;
  padding-bottom: 3rem;
}

.publication-title {
  font-family: "Google Sans", "Noto Sans", Arial, sans-serif;
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 0.75rem;
}

.publication-subtitle {
  color: var(--text-secondary);
  font-weight: 500;
  line-height: 1.25;
  margin-bottom: 1.5rem;
}

.publication-authors {
  font-family: "Google Sans", "Noto Sans", Arial, sans-serif;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
}

.author-block {
  display: inline-block;
  margin: 0 0.35rem;
}

.publication-venue {
  display: block;
  margin-top: 0.2rem;
  font-weight: 700;
  color: var(--text-primary);
}

.publication-links {
  margin-top: 1.25rem;
}

.link-block {
  display: inline-block;
  margin: 0.25rem;
}

.button {
  border-radius: 999px;
  font-weight: 700;
  transition: background 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
}

.button.is-dark {
  background: #1f2937;
  border-color: #1f2937;
  color: #ffffff;
}

.button.is-dark:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: var(--shadow);
  text-decoration: none;
}

.title.is-3 {
  font-family: "Google Sans", "Noto Sans", Arial, sans-serif;
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 1.6rem;
}

.paper-copy {
  max-width: 850px;
  margin: 0 auto;
  color: var(--text-secondary);
  font-size: 1.05rem;
}

.paper-copy p {
  margin-bottom: 1rem;
}

.plain-summary {
  margin-bottom: 1.35rem;
  padding: 1.2rem 1.3rem;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--evidence);
  border-radius: var(--radius);
}

.plain-summary h3 {
  margin-bottom: 0.45rem;
  color: var(--text-primary);
  font-size: 1rem;
  font-weight: 700;
}

.plain-summary p:last-child {
  margin-bottom: 0;
}

.section-lead {
  max-width: 850px;
  margin: -0.6rem auto 1.4rem;
  color: var(--text-secondary);
  font-size: 1.03rem;
  line-height: 1.6;
  text-align: center;
}

.term-gloss {
  color: var(--text-muted);
  font-size: 0.94em;
}

.caveat {
  color: var(--warning);
  font-size: 0.95rem;
}

.figure-block {
  max-width: 980px;
  margin: 0 auto 1.5rem;
  text-align: center;
}

.figure-block.compact {
  max-width: 760px;
}

.method-overview-figure {
  max-width: 1180px;
  margin: 0 auto 1.45rem;
}

.figure-block img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  background: #ffffff;
  box-shadow: var(--shadow);
}

.method-overview-figure img {
  margin: 0 auto;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.challenge-panel-tabs {
  margin-bottom: 0;
}

.challenge-figure {
  margin-top: 0;
}

.panel-content[data-panel="challenge"] {
  margin-top: 0;
}

.challenge-figure img {
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.steering-source-copy {
  max-width: 880px;
  margin: 0 auto 1rem;
}

.steering-demo-figure {
  --steering-demo-shift: 50px;
  width: min(1062px, calc(90vw - 1.8rem));
  max-width: none;
  margin: 0 0 2rem calc(50% + var(--steering-demo-shift));
  transform: translateX(-50%);
}

.steering-demo-figure img {
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.steering-result-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(260px, 0.85fr);
  gap: 1.35rem;
  align-items: center;
  width: min(1120px, calc(100vw - 2rem));
  max-width: none;
  margin: 0 0 0 50%;
  transform: translateX(-50%);
}

.steering-result-figure {
  max-width: none;
  margin: 0;
}

.steering-result-figure img {
  box-shadow: 0 4px 14px rgb(15 23 42 / 0.04);
}

.steering-result-summary {
  align-self: center;
}

.steering-result-summary h3 {
  margin-bottom: 0.55rem;
  color: var(--text-primary);
  font-size: 1.2rem;
  font-weight: 800;
}

.steering-result-copy {
  max-width: none;
}

.steering-result-copy p {
  margin-bottom: 0;
}

.figure-block figcaption {
  max-width: 850px;
  margin: 0.75rem auto 0;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.5;
}

.notice-line,
.caption-lead {
  color: var(--text-primary);
  font-weight: 700;
}

.triplet-card {
  max-width: 920px;
  margin: 0 auto 1.5rem;
  padding: 1.2rem 1.3rem;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  box-shadow: 0 4px 14px rgb(15 23 42 / 0.05);
}

.triplet-question {
  margin-bottom: 0.8rem;
  color: var(--text-primary);
  font-size: 1.04rem;
}

.triplet-question strong {
  color: var(--accent-dark);
}

.triplet-answers {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin-bottom: 0.9rem;
}

.triplet-answers p {
  margin: 0;
  padding: 0.8rem;
  color: var(--text-secondary);
  background: var(--background-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  line-height: 1.45;
}

.triplet-answers strong {
  display: block;
  margin-bottom: 0.2rem;
  color: var(--text-primary);
}

.triplet-contrast {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.triplet-contrast p {
  margin: 0;
  padding: 0.75rem 0.8rem;
  color: var(--text-primary);
  background: #f8fbff;
  border: 1px solid #bfd3f2;
  border-radius: var(--radius);
  line-height: 1.45;
}

.metric-name {
  color: var(--text-primary);
  font-weight: 700;
}

.metric-value {
  display: inline-block;
  margin: 0 0.08rem;
  padding: 0.04rem 0.3rem;
  color: var(--accent-dark);
  background: #ffffff;
  border: 1px solid #c7d7ee;
  border-radius: 6px;
  font-family: "SFMono-Regular", "Roboto Mono", Consolas, monospace;
  font-size: 0.92em;
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  line-height: 1.25;
}

.method-grid,
.case-grid,
.metric-grid,
.results-strip {
  display: grid;
  gap: 1rem;
}

.method-grid {
  grid-template-columns: repeat(3, 1fr);
  max-width: 1000px;
  margin: 1.5rem auto 0;
}

.case-grid {
  grid-template-columns: repeat(3, 1fr);
  margin-bottom: 2rem;
}

.case-study-prompt {
  max-width: 900px;
  margin: 0 auto 1rem;
  padding: 0.9rem 1rem;
  color: var(--text-primary);
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  text-align: center;
}

.case-study-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.1rem;
  max-width: 1180px;
  margin: 0 auto 1rem;
}

.case-study-card {
  padding: 1.1rem;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  box-shadow: 0 4px 14px rgb(15 23 42 / 0.05);
}

.case-study-card h3 {
  margin-bottom: 0.45rem;
  color: var(--text-primary);
  font-size: 1.08rem;
  font-weight: 800;
}

.case-study-context {
  margin-bottom: 0.8rem;
  color: var(--text-secondary);
}

.case-study-examples {
  display: grid;
  gap: 0.45rem;
  margin-bottom: 0.9rem;
}

.case-study-examples p {
  margin: 0;
  padding: 0.55rem 0.65rem;
  color: var(--text-secondary);
  background: var(--background-secondary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-size: 0.92rem;
  line-height: 1.35;
}

.case-study-comparison {
  display: grid;
  gap: 0.6rem;
}

.case-study-row {
  padding: 0.75rem;
  background: #fbfcfe;
  border: 1px solid var(--border-color);
  border-radius: 6px;
}

.case-study-row.is-rd {
  background: #f1fbf8;
  border-color: #a6d9cf;
}

.case-study-row span {
  display: block;
  margin-bottom: 0.2rem;
  color: var(--text-muted);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

.case-study-row strong {
  display: block;
  color: var(--text-primary);
  font-size: 0.94rem;
  line-height: 1.35;
}

.case-study-row dl {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.45rem;
  margin: 0.65rem 0 0;
}

.case-study-row dl div {
  padding-top: 0.55rem;
  border-top: 1px solid rgb(15 23 42 / 0.1);
}

.case-study-row dt {
  color: var(--text-muted);
  font-size: 0.74rem;
  font-weight: 700;
}

.case-study-row dd {
  margin: 0.12rem 0 0;
  color: var(--accent-dark);
  font-family: "SFMono-Regular", "Roboto Mono", Consolas, monospace;
  font-size: 0.96rem;
  font-weight: 800;
}

.case-study-implication {
  max-width: 920px;
  margin: 0.9rem auto 0;
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.55;
  text-align: center;
}

.caveat-panel {
  max-width: 860px;
  margin: 0 auto;
  padding: 1.15rem 1.25rem;
  color: var(--text-secondary);
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
}

.caveat-panel p {
  margin-bottom: 0.85rem;
  color: var(--text-primary);
}

.caveat-panel ul {
  margin: 0;
  padding-left: 1.2rem;
}

.caveat-panel li {
  margin-bottom: 0.45rem;
}

.caveat-panel li:last-child {
  margin-bottom: 0;
}

.results-strip {
  grid-template-columns: repeat(3, 1fr);
  margin-bottom: 1.75rem;
}

.method-grid article,
.case-grid article,
.results-strip article,
.metric-grid div,
.iteration-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  box-shadow: 0 4px 14px rgb(15 23 42 / 0.05);
}

.method-grid article,
.case-grid article,
.results-strip article {
  padding: 1.25rem;
}

.method-grid h3,
.case-grid h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.method-grid p,
.case-grid p,
.results-strip p {
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

.results-strip span {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--text-muted);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.results-strip strong {
  display: block;
  margin-bottom: 0.45rem;
  color: var(--text-primary);
  font-size: 1rem;
  line-height: 1.35;
}

.results-strip p:last-child {
  margin-bottom: 0;
}

.iteration-card {
  padding: 0.75rem;
}

.iteration-row {
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 0.75rem;
  padding: 0.9rem 0.8rem;
  border-bottom: 1px solid var(--border-color);
}

.iteration-row:last-child {
  border-bottom: 0;
}

.iteration-row span {
  color: var(--text-secondary);
}

.iteration-row strong {
  color: var(--accent-dark);
}

.iteration-row em {
  color: var(--evidence);
  font-style: normal;
  font-weight: 700;
}

.rd-trace-widget {
  max-width: 1180px;
  margin: 0 auto;
}

.rd-trace-toolbar {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.rd-trace-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 270px;
  gap: 1rem;
  align-items: start;
}

.rd-trace-main {
  min-width: 0;
}

.rd-trace-main .figure-block {
  margin-bottom: 0;
}

.rd-trace-main .figure-block img {
  min-height: 400px;
  object-fit: contain;
}

.rd-trace-still-panel {
  display: none;
}

.rd-trace-still-panel.is-active {
  display: block;
}

.rd-trace-controls {
  margin-top: 1rem;
  padding: 1rem;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
}

.rd-trace-controls label {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  color: var(--text-primary);
  font-weight: 700;
}

.rd-trace-slider {
  width: 100%;
  margin: 0.75rem 0 0.95rem;
  accent-color: var(--accent);
}

.rd-stage-tabs {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.rd-stage-tab[hidden] {
  display: none;
}

.rd-trace-metrics {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1rem;
  box-shadow: 0 4px 14px rgb(15 23 42 / 0.05);
}

.rd-trace-metrics h3 {
  margin-bottom: 0.55rem;
  color: var(--text-primary);
  font-size: 1.05rem;
  font-weight: 700;
}

.rd-trace-selected,
.rd-trace-note {
  margin-bottom: 0.8rem;
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.45;
}

.rd-trace-note {
  margin-top: 0.85rem;
  margin-bottom: 0;
  color: var(--warning);
}

.rd-metric-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.8rem;
  padding: 0.62rem 0;
  border-bottom: 1px solid var(--border-color);
}

.rd-metric-row:last-of-type {
  border-bottom: 0;
}

.rd-metric-row span {
  color: var(--text-secondary);
  font-size: 0.92rem;
}

.rd-metric-row strong {
  color: var(--evidence);
  font-variant-numeric: tabular-nums;
}

.rd-trace-caveat {
  max-width: 900px;
  margin: 1rem auto 0;
  text-align: center;
}

.rd-trace-load-failed::after {
  content: "Static fallback values are visible because the trace JSON did not load.";
  display: block;
  max-width: 900px;
  margin: 1rem auto 0;
  color: var(--warning);
  font-size: 0.95rem;
  text-align: center;
}

.panel-tabs {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}

.panel-tab {
  border: 1px solid var(--border-color);
  background: #ffffff;
  color: var(--text-secondary);
  border-radius: 999px;
  padding: 0.65rem 1.1rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.panel-tab:hover,
.panel-tab.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: #ffffff;
}

.projection-tabs {
  margin-top: 0.2rem;
  margin-bottom: 0.85rem;
}

.projection-tabs .panel-tab {
  font-size: 0.92rem;
  padding: 0.5rem 0.95rem;
}

.panel-content {
  display: none;
}

.panel-content.is-active {
  display: block;
}

.metric-grid {
  grid-template-columns: 1fr;
  margin-bottom: 1.25rem;
}

.metric-grid div {
  padding: 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.metric-grid span {
  color: var(--text-secondary);
}

.metric-grid strong {
  color: var(--evidence);
}

pre {
  background: #f3f4f6;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1.25rem;
  overflow-x: auto;
  font-size: 0.9rem;
}

code {
  background: transparent;
  color: var(--text-primary);
  font-family: "SF Mono", "Cascadia Code", "Roboto Mono", Consolas, monospace;
}

.bibtex-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.copy-bibtex-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  border: 1px solid var(--accent);
  border-radius: 999px;
  padding: 0.6rem 1rem;
  color: #ffffff;
  background: var(--accent);
  font-weight: 700;
  cursor: pointer;
}

.copy-bibtex-btn:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
}

.copy-bibtex-btn.copied {
  background: var(--evidence);
  border-color: var(--evidence);
}

.footer {
  background: var(--background-secondary);
  border-top: 1px solid var(--border-color);
  padding: 2.5rem 1.5rem;
}

.footer p {
  color: var(--text-muted);
}

.scroll-to-top {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  width: 44px;
  height: 44px;
  border: 0;
  border-radius: 999px;
  background: var(--accent);
  color: #ffffff;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.18s ease, visibility 0.18s ease, transform 0.18s ease;
  z-index: 10;
  box-shadow: var(--shadow);
}

.scroll-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.scroll-to-top:hover {
  transform: translateY(-1px);
}

@media screen and (max-width: 900px) {
  .method-grid,
  .case-grid,
  .results-strip,
  .triplet-answers,
  .triplet-contrast,
  .rd-trace-layout {
    grid-template-columns: 1fr;
  }

  .case-study-grid {
    grid-template-columns: 1fr;
  }

  .steering-result-layout {
    grid-template-columns: 1fr;
    width: min(760px, calc(100vw - 2rem));
  }

  .steering-result-summary {
    max-width: 620px;
    margin: 0 auto;
  }

  .publication-title {
    font-size: 2.4rem !important;
  }

  .publication-subtitle {
    font-size: 1.35rem !important;
  }

  .steering-demo-figure {
    --steering-demo-shift: 0px;
  }

}

@media screen and (max-width: 640px) {
  .hero-body,
  .section {
    padding: 2.5rem 1rem;
  }

  .publication-title {
    font-size: 2rem !important;
  }

  .button {
    width: 100%;
    justify-content: center;
  }

  .link-block {
    display: block;
  }

  .iteration-row {
    grid-template-columns: 1fr;
    gap: 0.2rem;
  }

  .rd-trace-main .figure-block img {
    min-height: 260px;
  }

  .rd-trace-controls label,
  .rd-metric-row {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.15rem;
  }

  .bibtex-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .scroll-to-top {
    display: none;
  }
}