:root {
  --bone: #f5f2eb;
  --carbon: #1a1817;
  --smoke: #3f3d3a;
  --stone: #8b857c;
  --ash: #d8d4cb;
  --cream: #eeeae0;
  --oxblood: #5c1a1b;
  --oxblood-lift: #6b2024;
  --graphite: #243248;
  --graphite-lift: #2b3e5c;
  --white: #fffdfa;
  --shadow: 0 18px 50px rgba(26, 24, 23, 0.12);
  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bone);
  color: var(--carbon);
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.58;
}

body.dark-page {
  background: var(--carbon);
  color: var(--bone);
}

a {
  color: inherit;
  text-decoration-color: rgba(92, 26, 27, 0.35);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.24em;
}

a:hover {
  color: var(--oxblood);
  text-decoration-color: currentColor;
}

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

.skip-link {
  position: absolute;
  left: 12px;
  top: -44px;
  z-index: 20;
  padding: 8px 12px;
  background: var(--carbon);
  color: var(--bone);
  font-family: var(--sans);
  font-size: 13px;
}

.skip-link:focus {
  top: 12px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid rgba(216, 212, 203, 0.78);
  background: rgba(245, 242, 235, 0.94);
  backdrop-filter: blur(16px);
}

.dark-page .site-header,
.case-hero + .site-header {
  background: rgba(26, 24, 23, 0.92);
  border-color: rgba(245, 242, 235, 0.12);
}

.nav-wrap {
  width: min(1180px, calc(100vw - 40px));
  min-height: 72px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand-mark {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: max-content;
  text-decoration: none;
}

.brand-mark img {
  width: 154px;
  height: auto;
}

.dark-page .brand-mark img {
  filter: invert(1);
}

.brand-kicker {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--stone);
}

.primary-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px 18px;
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.primary-nav a {
  color: var(--smoke);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding: 7px 0;
}

.dark-page .primary-nav a {
  color: rgba(245, 242, 235, 0.76);
}

.primary-nav a[aria-current="page"],
.primary-nav a:hover {
  color: var(--oxblood);
  border-color: currentColor;
}

.dark-page .primary-nav a[aria-current="page"],
.dark-page .primary-nav a:hover {
  color: var(--bone);
}

.case-hero {
  min-height: 74vh;
  color: var(--bone);
  background-image:
    linear-gradient(90deg, rgba(26, 24, 23, 0.92), rgba(26, 24, 23, 0.62) 48%, rgba(26, 24, 23, 0.32)),
    url("https://upload.wikimedia.org/wikipedia/commons/thumb/b/b0/Ottapalam_railway_station.jpg/1280px-Ottapalam_railway_station.jpg");
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: flex-end;
  padding: 36px 0 72px;
}

.hero-grid,
.wrap {
  width: min(1180px, calc(100vw - 40px));
  margin: 0 auto;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 54px;
  align-items: end;
}

.eyebrow {
  margin: 0 0 16px;
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--oxblood);
}

.case-hero .eyebrow,
.dark-page .eyebrow {
  color: #c68888;
}

h1,
h2,
h3 {
  margin: 0;
  font-family: var(--serif);
  color: inherit;
}

h1 {
  max-width: 900px;
  font-size: clamp(42px, 8vw, 92px);
  line-height: 0.96;
  font-weight: 600;
}

h2 {
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.02;
  font-weight: 600;
}

h3 {
  font-size: 24px;
  line-height: 1.15;
  font-weight: 600;
}

.dek {
  max-width: 760px;
  margin: 22px 0 0;
  color: var(--smoke);
  font-size: 19px;
  font-style: italic;
}

.case-hero .dek,
.dark-page .dek {
  color: rgba(245, 242, 235, 0.78);
}

.hero-proof {
  border-left: 1px solid rgba(245, 242, 235, 0.24);
  padding-left: 24px;
}

.hero-proof .big-number {
  display: block;
  font-family: var(--mono);
  font-size: clamp(42px, 7vw, 78px);
  line-height: 0.9;
  color: var(--bone);
}

.hero-proof span {
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(245, 242, 235, 0.72);
}

.hero-proof p {
  margin: 18px 0 0;
  color: rgba(245, 242, 235, 0.78);
}

.section {
  padding: 72px 0;
}

.section.tight {
  padding: 46px 0;
}

.band {
  border-top: 1px solid var(--ash);
  border-bottom: 1px solid var(--ash);
  background: var(--cream);
}

.dark-band {
  background: var(--carbon);
  color: var(--bone);
}

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(280px, 0.55fr);
  gap: 48px;
  align-items: end;
  margin-bottom: 34px;
}

.section-head p {
  margin: 0;
  color: var(--smoke);
}

.dark-page .section-head p,
.dark-band .section-head p {
  color: rgba(245, 242, 235, 0.72);
}

.grid {
  display: grid;
  gap: 18px;
}

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

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

.grid.four {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.panel,
.metric,
.finding,
.source-card,
.route-card {
  background: rgba(255, 253, 250, 0.58);
  border: 1px solid var(--ash);
  border-radius: 8px;
}

.dark-page .panel,
.dark-page .metric,
.dark-page .finding,
.dark-page .source-card,
.dark-page .route-card,
.dark-band .panel,
.dark-band .metric,
.dark-band .finding {
  background: rgba(245, 242, 235, 0.045);
  border-color: rgba(245, 242, 235, 0.14);
}

.metric {
  padding: 22px;
  min-height: 158px;
}

.metric .label,
.panel-label {
  display: block;
  margin-bottom: 12px;
  font-family: var(--sans);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--oxblood);
}

.dark-page .metric .label,
.dark-page .panel-label,
.dark-band .metric .label,
.dark-band .panel-label {
  color: #c68888;
}

.metric .value {
  display: block;
  font-family: var(--mono);
  font-size: 34px;
  line-height: 1;
  color: var(--carbon);
}

.dark-page .metric .value,
.dark-band .metric .value {
  color: var(--bone);
}

.metric p,
.finding p,
.route-card p,
.source-card p {
  margin: 14px 0 0;
  color: var(--smoke);
  font-size: 15px;
}

.dark-page .metric p,
.dark-page .finding p,
.dark-page .route-card p,
.dark-band .metric p,
.dark-band .finding p {
  color: rgba(245, 242, 235, 0.72);
}

.panel {
  padding: 26px;
  overflow: hidden;
}

.panel h3 + p,
.panel p:first-child {
  margin-top: 10px;
}

.panel p,
.body-copy p {
  color: var(--smoke);
}

.dark-page .panel p,
.dark-band .panel p {
  color: rgba(245, 242, 235, 0.74);
}

.finding {
  padding: 24px;
}

.finding strong {
  display: block;
  font-family: var(--serif);
  font-size: 22px;
  line-height: 1.15;
}

.chart {
  min-height: 310px;
  margin-top: 18px;
}

.chart.short {
  min-height: 245px;
}

.chart svg {
  width: 100%;
  height: auto;
  display: block;
}

.axis-label,
.chart-note,
.mono {
  font-family: var(--mono);
}

.chart-title {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: baseline;
}

.chart-title h3 {
  font-size: 25px;
}

.chart-title span {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--stone);
}

.result-table,
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--sans);
  font-size: 14px;
}

.result-table th,
.result-table td,
.data-table th,
.data-table td {
  border-bottom: 1px solid var(--ash);
  padding: 12px 10px;
  text-align: left;
  vertical-align: top;
}

.result-table th,
.data-table th {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--stone);
}

.dark-page .result-table th,
.dark-page .result-table td,
.dark-page .data-table th,
.dark-page .data-table td,
.dark-band .result-table th,
.dark-band .result-table td,
.dark-band .data-table th,
.dark-band .data-table td {
  border-color: rgba(245, 242, 235, 0.14);
}

.rank {
  width: 38px;
  font-family: var(--mono);
  color: var(--stone);
}

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 25px;
  padding: 0 8px;
  border: 1px solid var(--ash);
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--smoke);
}

.pill.bjp {
  color: var(--oxblood);
  border-color: rgba(92, 26, 27, 0.36);
}

.dark-page .pill,
.dark-band .pill {
  border-color: rgba(245, 242, 235, 0.2);
  color: rgba(245, 242, 235, 0.75);
}

.feature-image {
  position: relative;
  min-height: 420px;
  overflow: hidden;
  border-radius: 8px;
  background: var(--carbon);
}

.feature-image img {
  width: 100%;
  height: 100%;
  min-height: 420px;
  object-fit: cover;
  filter: saturate(0.7) contrast(1.05);
}

.caption {
  margin: 10px 0 0;
  font-family: var(--sans);
  font-size: 12px;
  color: var(--stone);
}

.callout {
  margin: 28px 0;
  padding: 24px 0 24px 24px;
  border-left: 2px solid var(--oxblood);
  font-size: 23px;
  line-height: 1.28;
  color: var(--oxblood);
}

.dark-page .callout,
.dark-band .callout {
  color: #d39a9a;
}

.route-map {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  counter-reset: route;
}

.route-card {
  position: relative;
  padding: 24px;
}

.route-card::before {
  counter-increment: route;
  content: "0" counter(route);
  display: block;
  margin-bottom: 32px;
  font-family: var(--mono);
  color: var(--oxblood);
}

.source-card {
  padding: 18px;
}

.source-card a {
  display: inline-block;
  font-family: var(--sans);
  font-weight: 700;
}

.source-card p {
  font-size: 14px;
}

.page-hero {
  padding: 82px 0 52px;
  border-bottom: 1px solid var(--ash);
}

.dark-page .page-hero {
  border-color: rgba(245, 242, 235, 0.14);
}

.page-hero .dek {
  max-width: 860px;
}

.footer {
  padding: 42px 0;
  border-top: 1px solid var(--ash);
  font-family: var(--sans);
  font-size: 13px;
  color: var(--stone);
}

.dark-page .footer {
  border-color: rgba(245, 242, 235, 0.14);
}

.footer .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  align-items: center;
  justify-content: space-between;
}

.footer a {
  font-weight: 700;
}

.toc-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.toc-links a {
  padding: 8px 11px;
  border: 1px solid var(--ash);
  border-radius: 999px;
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 700;
  text-decoration: none;
}

.data-note {
  font-family: var(--sans);
  font-size: 13px;
  color: var(--stone);
}

@media (max-width: 940px) {
  .hero-grid,
  .section-head,
  .grid.two,
  .grid.three,
  .grid.four,
  .route-map {
    grid-template-columns: 1fr;
  }

  .hero-proof {
    max-width: 460px;
  }

  .nav-wrap {
    align-items: flex-start;
    flex-direction: column;
    padding: 16px 0;
    gap: 10px;
  }

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

@media (max-width: 640px) {
  body {
    font-size: 16px;
  }

  .hero-grid,
  .wrap {
    width: min(100vw - 28px, 1180px);
  }

  .case-hero {
    min-height: 78vh;
    padding-bottom: 42px;
  }

  .section {
    padding: 50px 0;
  }

  .panel,
  .metric,
  .finding,
  .route-card {
    padding: 20px;
  }

  .result-table,
  .data-table {
    font-size: 13px;
  }

  .result-table th,
  .result-table td,
  .data-table th,
  .data-table td {
    padding: 10px 6px;
  }
}