:root {
  color-scheme: light;
  --page: #f7f7f2;
  --paper: #ffffff;
  --paper-warm: #fbfbf7;
  --ink: #1f2933;
  --muted: #667085;
  --line: #d8ddd7;
  --teal: #0f766e;
  --blue: #315c91;
  --amber: #b45309;
  --rose: #9f1239;
  --green: #52796f;
  --shadow: 0 18px 40px rgba(31, 41, 51, 0.08);
  --max: 1180px;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--page);
  color: var(--ink);
}

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

button,
a {
  color: inherit;
}

a {
  text-decoration: none;
}

p,
h1,
h2,
h3,
h4 {
  margin-top: 0;
}

h1,
h2,
h3,
h4 {
  letter-spacing: 0;
}

h1 {
  max-width: 820px;
  margin-bottom: 18px;
  font-size: clamp(36px, 5.4vw, 56px);
  line-height: 1;
}

h2 {
  margin-bottom: 12px;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.05;
}

h3 {
  font-size: 20px;
  line-height: 1.25;
}

h4 {
  margin-bottom: 8px;
  font-size: 13px;
  text-transform: uppercase;
}

code {
  padding: 2px 5px;
  border-radius: 5px;
  background: #eef2f1;
  font-size: 0.92em;
}

.site-header {
  background:
    linear-gradient(135deg, rgba(15, 118, 110, 0.08), rgba(180, 83, 9, 0.08)),
    var(--page);
  border-bottom: 1px solid var(--line);
}

.topbar {
  max-width: var(--max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 18px 22px;
}

.brand,
.nav-links,
.hero-actions,
.chips,
.keyword-list {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-weight: 820;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 50%;
  background: var(--ink);
  color: #fff;
}

.nav-links {
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 4px;
}

.nav-links a {
  min-height: 34px;
  padding: 7px 10px;
  border-radius: 6px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 760;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  background: rgba(31, 41, 51, 0.07);
  color: var(--ink);
  outline: none;
}

.hero {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 520px);
  gap: 36px;
  align-items: center;
  padding: 28px 22px 32px;
}

.eyebrow {
  margin-bottom: 10px;
  color: var(--teal);
  font-size: 12px;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.lead,
.creator-statement,
.section-intro,
.abstract-panel p,
.method-grid p,
.publish-panel p,
.site-footer p,
.source-preview,
.detail-preview,
.empty-state {
  color: var(--muted);
  line-height: 1.65;
}

.lead {
  max-width: 720px;
  margin-bottom: 24px;
  font-size: 18px;
}

.creator-statement {
  max-width: 760px;
  margin-bottom: 14px;
  color: var(--ink);
  font-size: 15px;
  font-weight: 740;
}

.hero-actions {
  flex-wrap: wrap;
  gap: 10px;
}

.button,
.source-row {
  border: 1px solid var(--line);
  border-radius: 7px;
}

.button {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  padding: 9px 14px;
  font-weight: 780;
}

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

.button.secondary {
  background: rgba(255, 255, 255, 0.72);
}

.hero-visual {
  margin: 0;
}

.hero-visual canvas,
.mini-chart canvas {
  display: block;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper-warm);
}

.hero-visual canvas {
  height: 290px;
  box-shadow: var(--shadow);
}

figcaption {
  margin-top: 9px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 720;
  text-align: right;
}

.metrics-band,
.article-band,
.library-band,
.literature-band,
.method-band,
.publish-band {
  border-bottom: 1px solid var(--line);
}

.metrics-band,
.article-band,
.library-band,
.literature-band,
.method-band,
.publish-band,
.site-footer {
  padding: 52px 22px;
}

.metrics-band > *,
.article-band > *,
.library-band > *,
.literature-band > *,
.method-band > *,
.publish-band > *,
.site-footer > * {
  max-width: var(--max);
  margin-left: auto;
  margin-right: auto;
}

.section-heading {
  margin-bottom: 24px;
}

.section-heading.compact {
  margin-bottom: 18px;
}

.section-intro {
  max-width: 820px;
  margin-bottom: 0;
  font-size: 16px;
}

.metrics-grid,
.contribution-grid,
.method-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.metric,
.contribution,
.method-grid article,
.abstract-panel,
.filters-panel,
.source-results,
.source-detail,
.publish-panel {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.metric {
  padding: 18px;
}

.metric span,
.source-meta,
.results-heading span,
.literature-heading span,
.literature-kicker {
  color: var(--muted);
  font-size: 12px;
  font-weight: 760;
  text-transform: uppercase;
}

.metric strong {
  display: block;
  margin: 8px 0 4px;
  font-size: 38px;
  line-height: 1;
}

.metric p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 13px;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(320px, 1fr);
  gap: 24px;
  align-items: start;
}

.abstract-panel {
  padding: 22px;
}

.keyword-list,
.chips {
  flex-wrap: wrap;
  gap: 7px;
}

.keyword,
.chip {
  display: inline-flex;
  min-height: 26px;
  align-items: center;
  border: 1px solid rgba(15, 118, 110, 0.24);
  border-radius: 999px;
  padding: 4px 9px;
  background: #e7f4f1;
  color: var(--teal);
  font-size: 12px;
  font-weight: 760;
}

.chip.muted {
  border-color: var(--line);
  background: #f6f7f8;
  color: var(--muted);
}

.contribution-grid {
  margin-top: 14px;
}

.contribution {
  min-height: 146px;
  padding: 18px;
}

.contribution span {
  display: block;
  margin-bottom: 14px;
  color: var(--amber);
  font-size: 13px;
  font-weight: 860;
}

.contribution p {
  margin-bottom: 0;
  line-height: 1.55;
}

.library-shell {
  display: grid;
  grid-template-columns: minmax(240px, 290px) minmax(300px, 0.9fr) minmax(320px, 1fr);
  gap: 16px;
  align-items: start;
}

.filters-panel,
.source-results,
.source-detail {
  min-width: 0;
}

.filters-panel {
  display: grid;
  gap: 13px;
  padding: 16px;
  position: sticky;
  top: 10px;
}

label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

input,
select {
  width: 100%;
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  padding: 0 10px;
}

.mini-chart {
  padding-top: 4px;
}

.mini-chart canvas {
  height: 220px;
}

.results-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  min-height: 56px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
}

.results-heading h3 {
  margin-bottom: 0;
}

.source-list {
  max-height: 720px;
  overflow: auto;
}

.source-row {
  display: grid;
  width: 100%;
  gap: 8px;
  padding: 14px 16px;
  border-width: 0 0 1px;
  border-radius: 0;
  background: #fff;
  color: inherit;
  text-align: left;
  cursor: pointer;
}

.source-row:hover,
.source-row.active {
  background: #f2f8f6;
}

.source-row.active {
  box-shadow: inset 4px 0 0 var(--teal);
}

.source-title {
  font-weight: 800;
  line-height: 1.35;
}

.source-preview {
  display: -webkit-box;
  overflow: hidden;
  margin-bottom: 0;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  font-size: 13px;
}

.source-detail {
  padding: 18px;
  position: sticky;
  top: 10px;
}

.detail-header h3 {
  margin-bottom: 14px;
}

.detail-preview {
  margin-bottom: 18px;
}

.source-facts,
.publish-facts {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 10px 14px;
  margin: 0 0 18px;
}

dt {
  color: var(--muted);
  font-size: 12px;
  font-weight: 850;
  text-transform: uppercase;
}

dd {
  margin: 0;
  line-height: 1.45;
}

.literature-band {
  background: #fff;
}

.literature-controls {
  display: grid;
  grid-template-columns: minmax(240px, 1.4fr) repeat(3, minmax(170px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}

.literature-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 12px;
}

.literature-heading h3 {
  margin-bottom: 0;
}

.literature-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.literature-item {
  display: grid;
  grid-template-rows: 1fr auto;
  gap: 14px;
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper-warm);
}

.literature-item h3 {
  margin-bottom: 8px;
  font-size: 19px;
}

.literature-item p {
  margin-bottom: 10px;
  color: var(--muted);
  line-height: 1.55;
}

.literature-item .literature-kicker {
  margin-bottom: 8px;
  color: var(--amber);
  line-height: 1.2;
}

.literature-authors {
  color: var(--ink) !important;
  font-weight: 760;
}

.literature-source {
  font-size: 13px;
}

.text-link {
  justify-self: start;
  min-height: 34px;
  align-content: center;
  border-bottom: 2px solid rgba(15, 118, 110, 0.34);
  color: var(--teal);
  font-weight: 820;
}

.text-link:hover,
.text-link:focus-visible {
  border-color: var(--teal);
  outline: none;
}

.method-band {
  background: #f2f4f3;
}

.method-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.method-grid article {
  padding: 20px;
}

.method-grid p {
  margin-bottom: 0;
}

.publish-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 420px);
  gap: 24px;
  padding: 24px;
}

.publish-panel p {
  margin-bottom: 0;
}

.publish-facts {
  align-self: start;
  margin-bottom: 0;
  padding: 16px;
  border-radius: 8px;
  background: var(--paper-warm);
}

.site-footer {
  background: var(--ink);
  color: #fff;
}

.site-footer p {
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.78);
}

.site-footer .footer-statement {
  margin-bottom: 10px;
  color: #fff;
  font-weight: 760;
}

.error-panel {
  max-width: 680px;
  margin: 60px auto;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
}

@media (max-width: 1060px) {
  .hero,
  .article-layout,
  .library-shell,
  .literature-controls,
  .publish-panel {
    grid-template-columns: 1fr;
  }

  .hero-visual canvas {
    height: 320px;
  }

  .filters-panel,
  .source-detail {
    position: static;
  }

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

@media (max-width: 720px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-links {
    justify-content: flex-start;
  }

  .hero,
  .metrics-band,
  .article-band,
  .library-band,
  .literature-band,
  .method-band,
  .publish-band,
  .site-footer {
    padding-left: 16px;
    padding-right: 16px;
  }

  .hero {
    padding-top: 32px;
  }

  .hero-visual {
    display: none;
  }

  h1 {
    font-size: 38px;
  }

  .metrics-grid,
  .contribution-grid,
  .method-grid,
  .literature-list {
    grid-template-columns: 1fr;
  }

  .source-facts,
  .publish-facts {
    grid-template-columns: 1fr;
  }
}