:root {
  --vda-background: #fbfcff;
  --vda-surface: #f3f6fb;
  --vda-ink: #172033;
  --vda-muted: #59657a;
  --vda-line: #dce3ef;
  --vda-indigo: #1f4f9a;
  --vda-lavender: #7652b8;
  --vda-orange: #d85f00;
  --vda-indigo-soft: #eaf1fb;
  --vda-lavender-soft: #f2edfb;
  --vda-orange-soft: #fff1e7;
  --vda-max-width: 1060px;
  --vda-reading-width: 760px;
  --vda-radius: 10px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--vda-ink);
  background: var(--vda-background);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: var(--vda-indigo);
  text-underline-offset: 0.18em;
}

a:hover {
  text-decoration-thickness: 2px;
}

:focus-visible {
  outline: 3px solid var(--vda-orange);
  outline-offset: 3px;
}

section[id],
header[id] {
  scroll-margin-top: 76px;
}

.paper-wrap {
  width: min(calc(100% - 48px), var(--vda-max-width));
  margin-inline: auto;
}

.reading-wrap {
  width: min(calc(100% - 48px), var(--vda-reading-width));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.65rem 0.9rem;
  color: #fff;
  background: var(--vda-ink);
  border-radius: 6px;
  text-decoration: none;
  transform: translateY(-160%);
}

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

.paper-hero {
  position: relative;
  overflow: hidden;
  padding: 78px 0 62px;
  text-align: center;
  background:
    radial-gradient(
      680px 360px at 12% -15%,
      rgba(118, 82, 184, 0.16),
      transparent 72%
    ),
    radial-gradient(
      760px 420px at 92% 0%,
      rgba(31, 79, 154, 0.16),
      transparent 70%
    ),
    linear-gradient(180deg, #fff 0%, var(--vda-background) 100%);
  border-bottom: 1px solid var(--vda-line);
}

.paper-hero::after {
  position: absolute;
  right: max(24px, calc((100vw - var(--vda-max-width)) / 2));
  bottom: -18px;
  width: 90px;
  height: 90px;
  content: "";
  background:
    linear-gradient(135deg, transparent 48%, rgba(216, 95, 0, 0.3) 49% 51%, transparent 52%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
}

.project-badge {
  display: inline-block;
  padding: 6px 12px;
  color: var(--vda-indigo);
  background: var(--vda-indigo-soft);
  border: 1px solid rgba(31, 79, 154, 0.14);
  border-radius: 999px;
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.paper-hero h1 {
  max-width: 900px;
  margin: 20px auto 14px;
  font-size: clamp(2.2rem, 5vw, 3.65rem);
  line-height: 1.08;
  letter-spacing: -0.038em;
  text-wrap: balance;
}

.paper-subtitle {
  max-width: 760px;
  margin: 0 auto 26px;
  color: var(--vda-muted);
  font-size: clamp(1.05rem, 2vw, 1.24rem);
  text-wrap: balance;
}

.paper-authors,
.paper-affiliation,
.paper-venue {
  margin: 0.22rem auto;
}

.paper-authors {
  font-size: 1.04rem;
}

.paper-affiliation,
.paper-venue {
  color: var(--vda-muted);
  font-size: 0.92rem;
}

.paper-venue {
  font-style: italic;
}

.resource-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.7rem;
  margin-top: 27px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.68rem 1.05rem;
  color: var(--vda-ink);
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid var(--vda-line);
  border-radius: 999px;
  font-size: 0.88rem;
  font-weight: 750;
  line-height: 1.2;
  text-decoration: none;
  transition:
    transform 140ms ease,
    border-color 140ms ease,
    background 140ms ease;
}

.button:hover {
  background: #fff;
  border-color: #c4cfdf;
  text-decoration: none;
  transform: translateY(-1px);
}

.button-primary {
  color: #fff;
  background: var(--vda-indigo);
  border-color: var(--vda-indigo);
}

.button-primary:hover {
  color: #fff;
  background: #173f7f;
  border-color: #173f7f;
}

.overview-section {
  padding: 58px 0 50px;
  background: #fff;
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(260px, 0.7fr);
  align-items: end;
  gap: clamp(28px, 6vw, 72px);
  margin-bottom: 28px;
}

.section-heading h2,
.core-copy h2,
.results-intro h2,
.abstract-section h2,
.limitations-layout h2 {
  margin: 0;
  font-size: clamp(1.75rem, 3.2vw, 2.55rem);
  line-height: 1.16;
  letter-spacing: -0.028em;
  text-wrap: balance;
}

.section-heading > p {
  margin: 0;
  color: var(--vda-muted);
}

.section-kicker {
  margin: 0 0 0.5rem;
  color: var(--vda-orange);
  font-size: 0.75rem;
  font-weight: 850;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.overview-figure {
  position: relative;
  margin: 0;
  padding: clamp(10px, 2vw, 18px);
  background: #fff;
  border: 1px solid var(--vda-line);
  box-shadow: 0 20px 55px rgba(23, 32, 51, 0.07);
}

.overview-figure::before,
.method-card::before,
.evidence-grid article::before {
  position: absolute;
  top: -1px;
  right: -1px;
  width: 34px;
  height: 34px;
  content: "";
  background:
    linear-gradient(
      135deg,
      transparent 0 48%,
      var(--vda-background) 49% 100%
    );
  border-top: 1px solid var(--vda-line);
  border-right: 1px solid var(--vda-line);
  pointer-events: none;
}

.overview-figure img {
  width: 100%;
  height: auto;
}

.overview-figure figcaption {
  max-width: var(--vda-reading-width);
  margin: 14px auto 0;
  color: var(--vda-muted);
  font-size: 0.88rem;
  text-align: center;
}

.paper-nav {
  position: sticky;
  z-index: 20;
  top: 0;
  background: rgba(251, 252, 255, 0.94);
  border-block: 1px solid var(--vda-line);
  backdrop-filter: blur(14px);
}

.paper-nav-inner {
  display: flex;
  width: min(calc(100% - 32px), var(--vda-max-width));
  margin-inline: auto;
  overflow-x: auto;
  scrollbar-width: none;
}

.paper-nav-inner::-webkit-scrollbar {
  display: none;
}

.paper-nav a {
  flex: 0 0 auto;
  padding: 0.86rem 0.92rem;
  color: var(--vda-muted);
  font-size: 0.81rem;
  font-weight: 760;
  text-decoration: none;
  white-space: nowrap;
}

.paper-nav a:hover,
.paper-nav a:focus-visible {
  color: var(--vda-indigo);
}

.article-section {
  padding: 76px 0;
}

.core-section {
  background:
    linear-gradient(90deg, rgba(31, 79, 154, 0.04), transparent 42%),
    var(--vda-background);
}

.core-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
  align-items: center;
  gap: clamp(38px, 8vw, 92px);
}

.core-copy .lead {
  margin: 24px 0 14px;
  color: #2f3b50;
  font-size: 1.08rem;
}

.core-copy > p:last-child {
  color: var(--vda-muted);
}

.core-answer {
  position: relative;
  padding: 30px 28px 26px;
  background: var(--vda-indigo-soft);
  border-left: 5px solid var(--vda-indigo);
}

.core-answer::after {
  position: absolute;
  right: -12px;
  bottom: -12px;
  width: 48px;
  height: 48px;
  content: "";
  border-right: 2px solid rgba(118, 82, 184, 0.45);
  border-bottom: 2px solid rgba(118, 82, 184, 0.45);
}

.core-answer span {
  color: var(--vda-indigo);
  font-size: 0.75rem;
  font-weight: 850;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.core-answer p {
  margin: 10px 0 0;
  font-size: 1.08rem;
  font-weight: 680;
  line-height: 1.55;
}

.method-section {
  background: #fff;
}

.method-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.method-card {
  position: relative;
  min-height: 300px;
  padding: 28px 25px;
  overflow: hidden;
  border: 1px solid var(--vda-line);
}

.method-card.partition {
  background: var(--vda-lavender-soft);
  border-top: 4px solid var(--vda-lavender);
}

.method-card.anchor {
  background: var(--vda-orange-soft);
  border-top: 4px solid var(--vda-orange);
}

.method-card.fuse {
  background: var(--vda-indigo-soft);
  border-top: 4px solid var(--vda-indigo);
}

.method-number {
  margin: 0;
  color: rgba(23, 32, 51, 0.28);
  font-size: 2.1rem;
  font-weight: 850;
  line-height: 1;
}

.method-label {
  margin: 20px 0 7px;
  font-size: 0.75rem;
  font-weight: 850;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.partition .method-label {
  color: var(--vda-lavender);
}

.anchor .method-label {
  color: var(--vda-orange);
}

.fuse .method-label {
  color: var(--vda-indigo);
}

.method-card h3 {
  margin: 0 0 12px;
  font-size: 1.24rem;
  line-height: 1.28;
  letter-spacing: -0.015em;
}

.method-card > p:last-child {
  margin: 0;
  color: var(--vda-muted);
  font-size: 0.92rem;
}

.method-exclusions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.method-exclusions p {
  margin: 0;
  padding: 7px 11px;
  color: var(--vda-muted);
  background: var(--vda-surface);
  border: 1px solid var(--vda-line);
  font-size: 0.78rem;
  font-weight: 700;
}

.method-exclusions p::before {
  margin-right: 0.42rem;
  color: var(--vda-orange);
  content: "—";
}

.results-section {
  background:
    linear-gradient(135deg, rgba(31, 79, 154, 0.09), transparent 44%),
    var(--vda-surface);
}

.results-intro {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(300px, 0.8fr);
  align-items: end;
  gap: clamp(32px, 7vw, 88px);
}

.results-intro h2 {
  max-width: 690px;
}

.results-intro > div > p:last-child {
  max-width: 680px;
  margin: 20px 0 0;
  color: var(--vda-muted);
  font-size: 1.02rem;
}

.result-callout {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  margin: 0;
  background: #fff;
  border: 1px solid var(--vda-line);
  box-shadow: 0 14px 40px rgba(23, 32, 51, 0.06);
}

.result-callout div {
  padding: 22px 18px;
  text-align: center;
}

.result-callout div + div {
  border-left: 1px solid var(--vda-line);
}

.result-callout dt {
  color: var(--vda-indigo);
  font-size: 1.8rem;
  font-weight: 850;
  letter-spacing: -0.035em;
}

.result-callout dd {
  margin: 2px 0 0;
  color: var(--vda-muted);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.results-table-wrap {
  margin-top: 34px;
  overflow-x: auto;
  background: #fff;
  border: 1px solid var(--vda-line);
  box-shadow: 0 18px 48px rgba(23, 32, 51, 0.06);
}

table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
}

caption {
  padding: 15px 18px;
  color: var(--vda-muted);
  font-size: 0.82rem;
  text-align: left;
  caption-side: bottom;
}

th,
td {
  padding: 15px 18px;
  border-bottom: 1px solid var(--vda-line);
  text-align: right;
  white-space: nowrap;
}

thead th {
  color: var(--vda-muted);
  background: #f8faff;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

th:first-child,
td:first-child {
  text-align: left;
}

tbody th {
  font-size: 0.9rem;
}

tbody td {
  font-variant-numeric: tabular-nums;
}

tbody tr:last-child th,
tbody tr:last-child td {
  border-bottom: 0;
}

.primary-result {
  color: #13386f;
  background: var(--vda-indigo-soft);
}

.primary-result th,
.primary-result td {
  font-weight: 800;
}

.table-note {
  max-width: var(--vda-reading-width);
  margin: 16px 0 0;
  color: var(--vda-muted);
  font-size: 0.82rem;
}

.evidence-section {
  background: #fff;
}

.evidence-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.evidence-grid article {
  position: relative;
  padding: 26px 25px 23px;
  overflow: hidden;
  background: var(--vda-background);
  border: 1px solid var(--vda-line);
}

.evidence-grid article > span {
  color: var(--vda-lavender);
  font-size: 0.73rem;
  font-weight: 850;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.evidence-grid h3 {
  margin: 10px 0 8px;
  font-size: 1.2rem;
}

.evidence-grid p {
  margin: 0;
  color: var(--vda-muted);
  font-size: 0.92rem;
}

.abstract-section {
  color: #ecf3ff;
  background:
    radial-gradient(700px 340px at 15% 0%, rgba(118, 82, 184, 0.24), transparent 70%),
    #172b50;
}

.abstract-section .section-kicker {
  color: #ffae70;
}

.abstract-section h2 {
  margin-bottom: 26px;
  color: #fff;
}

.abstract-section p:not(.section-kicker) {
  color: #d5dfef;
}

.abstract-section p:last-child {
  margin-bottom: 0;
}

.limitations-section {
  background: var(--vda-background);
}

.limitations-layout {
  display: grid;
  grid-template-columns: minmax(260px, 0.7fr) minmax(0, 1.3fr);
  gap: clamp(40px, 8vw, 100px);
}

.limitations-layout > div > p:last-child {
  color: var(--vda-muted);
}

.limitations-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.limitations-list li {
  padding: 17px 18px;
  color: var(--vda-muted);
  background: #fff;
  border-left: 3px solid var(--vda-orange);
  box-shadow: 0 8px 28px rgba(23, 32, 51, 0.045);
}

.limitations-list strong {
  color: var(--vda-ink);
}

.citation-section {
  background: #fff;
  border-top: 1px solid var(--vda-line);
}

.citation-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  align-items: start;
  gap: clamp(34px, 7vw, 82px);
}

.citation-details h2 {
  margin: 0 0 16px;
  font-size: clamp(1.8rem, 4vw, 2.55rem);
  line-height: 1.15;
  letter-spacing: -0.025em;
}

.citation-details > p:not(.section-kicker, .formatted-citation) {
  color: var(--vda-muted);
}

.formatted-citation {
  margin: 24px 0;
  padding: 18px 20px;
  color: #2f3b50;
  background: var(--vda-lavender-soft);
  border-left: 4px solid var(--vda-lavender);
}

.citation-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.bibtex-card {
  min-width: 0;
  padding: 24px;
  color: #eaf1fb;
  background: #111d33;
  border: 1px solid #243755;
  border-radius: var(--vda-radius);
  box-shadow: 0 18px 45px rgba(23, 32, 51, 0.16);
}

.bibtex-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.bibtex-heading p {
  margin: 0;
  color: #fff;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

#copy-citation {
  min-height: 38px;
  padding: 0.48rem 0.78rem;
  color: #fff;
  background: transparent;
  border: 1px solid #526989;
  border-radius: 999px;
  font: inherit;
  font-size: 0.76rem;
  font-weight: 750;
  cursor: pointer;
}

#copy-citation:hover,
#copy-citation:focus-visible {
  background: #203451;
  border-color: #8197b5;
}

#citation-status {
  min-height: 1.4em;
  margin: 12px 0 0;
  color: #bfcde1;
  font-size: 0.78rem;
}

.bibtex-card pre {
  margin: 18px 0 0;
  overflow-x: auto;
  color: #dce7f8;
  font-size: 0.82rem;
  line-height: 1.65;
  white-space: pre;
}

.bibtex-card code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

.paper-footer {
  padding: 26px 0;
  background: #fff;
  border-top: 1px solid var(--vda-line);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px 24px;
}

.footer-inner p {
  margin: 0;
  color: var(--vda-muted);
  font-size: 0.84rem;
}

@media (max-width: 900px) {
  .section-heading,
  .core-layout,
  .results-intro,
  .limitations-layout,
  .citation-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .core-answer {
    max-width: 620px;
  }
}

@media (max-width: 760px) {
  .paper-wrap,
  .reading-wrap {
    width: min(calc(100% - 30px), var(--vda-max-width));
  }

  .paper-hero {
    padding: 58px 0 46px;
  }

  .paper-hero h1 {
    font-size: clamp(2rem, 11vw, 2.8rem);
  }

  .overview-section,
  .article-section {
    padding: 54px 0;
  }

  .overview-heading {
    display: block;
  }

  .overview-heading > p {
    margin-top: 14px;
  }

  .method-grid,
  .evidence-grid {
    grid-template-columns: 1fr;
  }

  .method-card {
    min-height: auto;
  }

  .result-callout {
    max-width: 440px;
  }

  .paper-nav-inner {
    width: 100%;
    padding-inline: 6px;
  }

  .footer-inner {
    display: block;
  }

  .footer-inner p + p {
    margin-top: 8px;
  }
}

@media (max-width: 420px) {
  .resource-links {
    align-items: stretch;
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .citation-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .citation-actions .button {
    width: 100%;
  }

  .result-callout {
    grid-template-columns: 1fr;
  }

  .result-callout div + div {
    border-top: 1px solid var(--vda-line);
    border-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

@media print {
  body {
    color: #000;
    background: #fff;
  }

  .paper-nav,
  .resource-links,
  .citation-actions,
  .skip-link {
    display: none;
  }

  .paper-hero,
  .overview-section,
  .article-section,
  .abstract-section,
  .paper-footer {
    padding: 22px 0;
    color: #000;
    background: #fff;
  }

  .abstract-section h2,
  .abstract-section p:not(.section-kicker) {
    color: #000;
  }

  .overview-figure,
  .results-table-wrap,
  .result-callout,
  .limitations-list li {
    box-shadow: none;
  }

  .bibtex-card {
    color: #000;
    background: #fff;
    border: 1px solid #000;
    box-shadow: none;
  }

  .bibtex-heading p,
  .bibtex-card pre {
    color: #000;
  }

  #copy-citation,
  #citation-status {
    display: none;
  }

  a {
    color: #000;
    text-decoration: underline;
  }
}