:root {
  color-scheme: light;
  --ink: #111417;
  --ink-soft: #42505b;
  --muted: #667480;
  --paper: #f7fbfc;
  --surface: #ffffff;
  --surface-strong: #edf5f7;
  --line: #d7e4e7;
  --line-strong: #a9c2c7;
  --blue: #3158ff;
  --green: #008b76;
  --red: #e94c3d;
  --amber: #d67b16;
  --shadow: 0 22px 55px rgba(17, 20, 23, 0.12);
  --page: min(1180px, calc(100% - 40px));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  overflow-x: clip;
  text-rendering: optimizeLegibility;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -2;
  content: "";
  background:
    linear-gradient(rgba(17, 20, 23, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(17, 20, 23, 0.045) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.5), transparent 72%);
}

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

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

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

strong {
  color: var(--ink);
  font-weight: 800;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
  min-height: 72px;
  padding: 14px max(20px, calc((100vw - 1180px) / 2));
  border-bottom: 1px solid rgba(215, 228, 231, 0.82);
  background: rgba(247, 251, 252, 0.9);
  backdrop-filter: blur(18px);
}

.brand,
.site-nav,
.author-strip,
.hero-actions,
.result-tabs,
.site-footer,
.metric-strip {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  min-width: max-content;
  font-weight: 800;
  justify-self: start;
}

.brand-mark {
  width: 16px;
  height: 16px;
  border: 3px solid var(--ink);
  border-right-color: var(--red);
  border-bottom-color: var(--green);
  transform: rotate(45deg);
}

.site-nav {
  gap: 8px;
  justify-self: center;
  padding: 5px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.82);
  border-radius: 8px;
}

.site-nav a {
  min-height: 38px;
  padding: 8px 12px;
  border-radius: 7px;
  color: var(--ink-soft);
  font-size: 0.92rem;
  font-weight: 700;
  transition: background 160ms ease, color 160ms ease, transform 160ms ease;
}

.site-nav a:hover {
  background: var(--surface-strong);
  color: var(--ink);
}

.section-band {
  position: relative;
  padding: 96px 0;
}

.section-light {
  background: var(--surface);
}

.hero {
  min-height: calc(100svh - 72px);
  padding-top: 76px;
  padding-bottom: 52px;
  overflow: clip;
  border-bottom: 1px solid var(--line);
}

.hero-inner,
.hero-evidence,
.section-head,
.section-grid,
.results-layout,
.table-grid,
.visual-grid,
.site-footer {
  width: var(--page);
  margin: 0 auto;
}

.hero-evidence > *,
.section-grid > *,
.results-layout > *,
.table-grid > *,
.visual-grid > * {
  min-width: 0;
}

.hero-inner {
  text-align: center;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--red);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 980px;
  margin: 0 auto;
  font-size: 3.55rem;
  line-height: 1.02;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 18px;
  font-size: 2.35rem;
  line-height: 1.08;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 8px;
  font-size: 1.05rem;
  line-height: 1.25;
  letter-spacing: 0;
}

.hero-lede {
  max-width: 820px;
  margin: 20px auto 0;
  color: var(--ink-soft);
  font-size: 1.12rem;
}

.hero-actions {
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 18px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 800;
  line-height: 1;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

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

.btn-primary {
  background: var(--ink);
  color: var(--surface);
  box-shadow: 0 14px 30px rgba(17, 20, 23, 0.22);
}

.btn-secondary {
  border-color: var(--line-strong);
  background: var(--surface);
  color: var(--ink);
}

.btn-ghost {
  border-color: transparent;
  background: rgba(255, 255, 255, 0.58);
  color: var(--green);
}

.author-strip {
  justify-content: center;
  flex-wrap: wrap;
  gap: 6px 10px;
  max-width: 930px;
  margin: 22px auto 0;
  color: var(--ink-soft);
  font-size: 0.96rem;
  font-weight: 600;
}

.author-strip a {
  padding: 2px 0;
  border-bottom: 1px solid transparent;
}

.author-strip a:hover {
  border-color: var(--red);
  color: var(--ink);
}

.author-strip a:not(:last-child)::after {
  margin-left: 10px;
  color: var(--line-strong);
  content: "/";
}

.equal-note {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.hero-evidence {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 310px;
  gap: 14px;
  align-items: stretch;
  margin-top: 34px;
}

.wide-figure {
  max-width: none;
  margin-inline: 0;
}

.wide-figure,
.feature-figure,
.image-panel,
.abstract-figure,
.chart-surface,
.table-card,
.citation-block {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.wide-figure,
.feature-figure,
.image-panel,
.abstract-figure {
  margin: 0;
  overflow: hidden;
}

.wide-figure img,
.feature-figure img,
.image-panel img,
.abstract-figure img {
  width: 100%;
  background: var(--surface);
}

figcaption {
  padding: 14px 16px 16px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
}

.metric-strip {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  max-width: none;
  margin: 0;
}

.metric-strip div {
  min-height: 0;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.92);
}

.metric-strip dt {
  color: var(--green);
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 1.38rem;
  font-weight: 800;
  line-height: 1;
}

.metric-strip dd {
  margin: 7px 0 0;
  color: var(--ink-soft);
  font-size: 0.84rem;
}

.section-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.22fr);
  gap: 64px;
  align-items: start;
}

.section-kicker {
  position: sticky;
  top: 104px;
}

.section-kicker p:not(.eyebrow),
.section-head p {
  color: var(--ink-soft);
  font-size: 1.06rem;
}

.section-copy p {
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.contribution-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
}

.abstract-figure {
  margin-top: 24px;
  box-shadow: 0 14px 34px rgba(17, 20, 23, 0.09);
}

.abstract-figure img {
  max-height: 360px;
  padding: 14px;
  object-fit: contain;
}

.contribution-grid article,
.step-list article,
.result-notes,
.table-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.contribution-grid article {
  padding: 22px;
}

.contribution-grid span {
  display: inline-flex;
  margin-bottom: 18px;
  color: var(--blue);
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.9rem;
  font-weight: 800;
}

.contribution-grid p,
.step-list p,
.result-notes li {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.94rem;
}

.section-results,
.section-citation {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(237, 245, 247, 0.74), rgba(247, 251, 252, 0.96)),
    var(--paper);
}

.section-head {
  max-width: 900px;
  margin-bottom: 38px;
}

.method-steps {
  width: var(--page);
  margin: 0 auto;
}

.step-list {
  display: grid;
  gap: 12px;
}

.step-list article {
  padding: 22px;
}

.step-list strong {
  display: inline-flex;
  margin-bottom: 12px;
  color: var(--red);
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.82rem;
  text-transform: uppercase;
}

.result-tabs {
  width: var(--page);
  margin: 0 auto 18px;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 2px;
}

.result-tab {
  min-width: 140px;
  min-height: 42px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--ink-soft);
  font-weight: 800;
  cursor: pointer;
}

.result-tab.is-active {
  border-color: var(--ink);
  background: var(--ink);
  color: var(--surface);
}

.feature-figure {
  width: var(--page);
  margin: 0 auto;
}

.feature-figure img {
  padding: 22px;
}

.method-steps {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 18px;
}

.results-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 330px;
  gap: 18px;
  align-items: stretch;
}

.chart-surface {
  padding: 22px;
}

.chart-title-row {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 14px;
}

.chart-title-row p {
  margin: 0;
  color: var(--muted);
}

#chartUnit {
  align-self: start;
  min-width: max-content;
  padding: 7px 10px;
  border: 1px solid var(--line);
  border-radius: 7px;
  color: var(--green);
  font-size: 0.82rem;
  font-weight: 800;
}

.result-chart {
  width: 100%;
  min-height: 330px;
}

.result-notes {
  padding: 22px;
}

.result-notes ul {
  display: grid;
  gap: 12px;
  padding: 0;
  margin: 14px 0 0;
  list-style: none;
}

.result-notes li {
  position: relative;
  padding-left: 18px;
}

.result-notes li::before {
  position: absolute;
  top: 0.64em;
  left: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--red);
  content: "";
}

.table-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 18px;
}

.table-card {
  padding: 20px;
  overflow: hidden;
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  font-size: 0.9rem;
}

th,
td {
  padding: 12px 10px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  white-space: nowrap;
}

th {
  color: var(--ink);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

td {
  color: var(--ink-soft);
  font-weight: 600;
}

.ours-row td {
  color: var(--ink);
  background: rgba(0, 139, 118, 0.08);
}

.visual-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

.visual-large {
  grid-column: 1 / -1;
}

.visual-cluster {
  grid-column: 1 / -1;
}

.visual-grid .image-panel img {
  padding: 12px;
  object-fit: contain;
}

.citation-block {
  padding: 18px;
}

pre {
  overflow-x: auto;
  margin: 0 0 16px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #101418;
  color: #f3fbfb;
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.86rem;
  line-height: 1.55;
}

.site-footer {
  justify-content: space-between;
  gap: 20px;
  padding: 34px 0;
  color: var(--muted);
}

.site-footer p {
  margin: 0;
}

.site-footer div {
  display: flex;
  gap: 16px;
  font-weight: 800;
}

.site-footer a:hover {
  color: var(--red);
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 520ms ease, transform 520ms ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 980px) {
  .site-header {
    grid-template-columns: 1fr auto;
    align-items: center;
  }

  .site-nav {
    grid-column: 1 / -1;
    grid-row: 2;
    justify-self: stretch;
    width: 100%;
    overflow-x: auto;
  }

  h1 {
    font-size: 2.8rem;
  }

  h2 {
    font-size: 2rem;
  }

  .metric-strip,
  .contribution-grid,
  .table-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .section-grid,
  .hero-evidence,
  .results-layout {
    grid-template-columns: 1fr;
  }

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

  .section-kicker {
    position: static;
  }

}

@media (max-width: 640px) {
  :root {
    --page: min(100% - 28px, 1180px);
  }

  .section-band {
    padding: 68px 0;
  }

  .hero {
    padding-top: 36px;
  }

  h1 {
    font-size: 1.96rem;
  }

  h2 {
    font-size: 1.62rem;
  }

  .hero-lede {
    font-size: 0.98rem;
  }

  .hero-actions {
    gap: 8px;
    margin-top: 22px;
  }

  .btn {
    min-height: 42px;
    padding: 10px 13px;
    font-size: 0.94rem;
  }

  .author-strip {
    gap: 4px 8px;
    margin-top: 18px;
    font-size: 0.86rem;
  }

  .author-strip a:not(:last-child)::after {
    margin-left: 8px;
  }

  .hero-evidence {
    margin-top: 24px;
  }

  .metric-strip,
  .contribution-grid,
  .table-grid,
  .visual-grid {
    grid-template-columns: 1fr;
  }

  .chart-title-row {
    display: block;
  }

  #chartUnit {
    display: inline-flex;
    margin-top: 10px;
  }

  .feature-figure img {
    padding: 10px;
  }

  .site-footer {
    display: block;
  }

  .site-footer div {
    margin-top: 12px;
  }
}