:root {
  color-scheme: light;
  --blue-900: #0b1a2b;
  --blue-700: #123155;
  --blue-500: #1c4d8c;
  --gray-100: #f4f6f8;
  --gray-200: #e3e7ee;
  --gray-400: #9aa6b2;
  --gray-700: #475569;
  --red-500: #b74c4c;
  --red-300: #d88c8c;
  --white: #ffffff;
  --gridline: #e3e7ee;
  --font-sans: "Inter", "Segoe UI", system-ui, sans-serif;
  --shadow: 0 12px 30px rgba(11, 26, 43, 0.12);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  line-height: 1.6;
  background: var(--white);
  color: var(--blue-900);
}

img {
  max-width: 100%;
}

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

.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  padding: 10px 16px;
  background: var(--blue-900);
  color: var(--white);
  z-index: 100;
}

.skip-link:focus {
  top: 10px;
}

.container {
  width: min(1200px, 92%);
  margin: 0 auto;
}

.site-header {
  background: var(--white);
  border-bottom: 1px solid var(--gray-200);
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--blue-900);
  color: var(--white);
  display: grid;
  place-items: center;
  font-weight: 700;
}

.brand-title {
  font-weight: 700;
  font-size: 1rem;
}

.brand-subtitle {
  font-size: 0.85rem;
  color: var(--gray-700);
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.9rem;
  color: var(--blue-700);
}

.nav a:hover {
  color: var(--red-500);
}

.hero {
  background: linear-gradient(130deg, #f7f9fc 0%, #ffffff 50%, #eef2f8 100%);
  padding: 100px 0 120px;
}

.hero-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 60px;
  align-items: center;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 1.2px;
  font-size: 0.75rem;
  color: var(--red-500);
  font-weight: 600;
}

h1 {
  font-size: clamp(2.2rem, 3vw, 3.4rem);
  margin: 12px 0 16px;
  color: var(--blue-900);
}

.lead {
  font-size: 1.1rem;
  color: var(--gray-700);
}

.hero-metrics {
  margin-top: 24px;
  display: grid;
  gap: 12px;
}

.metric-label {
  font-size: 0.75rem;
  color: var(--gray-700);
  text-transform: uppercase;
  letter-spacing: 0.8px;
}

.metric-value {
  font-weight: 600;
}

.hero-visual {
  position: relative;
  min-height: 360px;
  display: grid;
  place-items: center;
}

.hero-bg {
  position: absolute;
  inset: 0;
  border-radius: 24px;
  background: linear-gradient(145deg, rgba(11, 26, 43, 0.85), rgba(17, 49, 85, 0.8)),
    url("https://images.unsplash.com/photo-1501854140801-50d01698950b?auto=format&fit=crop&w=1200&q=80") center/cover no-repeat;
  opacity: 0.92;
}

.globe {
  position: relative;
  width: 240px;
  height: 240px;
  z-index: 1;
}

.globe-svg {
  width: 100%;
  height: 100%;
  filter: drop-shadow(0 10px 30px rgba(0, 0, 0, 0.35));
}

.globe-core {
  fill: rgba(255, 255, 255, 0.05);
  stroke: rgba(255, 255, 255, 0.4);
  stroke-width: 2;
}

.trade-route {
  fill: none;
  stroke: rgba(216, 140, 140, 0.9);
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-dasharray: 6 10;
  animation: route 6s linear infinite;
}

.globe-ring {
  position: absolute;
  inset: 20px;
  border-radius: 50%;
  border: 1px dashed rgba(255, 255, 255, 0.25);
  animation: spin 14s linear infinite;
}

.ring-two {
  inset: 10px;
  border-color: rgba(255, 255, 255, 0.15);
  animation-duration: 20s;
}

.ring-three {
  inset: 35px;
  border-color: rgba(255, 255, 255, 0.1);
  animation-duration: 26s;
}

.hero-caption {
  position: absolute;
  bottom: 20px;
  right: 20px;
  z-index: 1;
  color: var(--white);
  font-size: 0.8rem;
  text-align: right;
  max-width: 200px;
}

.section {
  padding: 100px 0;
}

.section + .section {
  border-top: 1px solid var(--gray-200);
}

.section-alt {
  background: var(--gray-100);
  border-top: none;
}

.section-header {
  margin-bottom: 60px;
  text-align: center;
}

.section-header h2 {
  font-size: clamp(2rem, 3vw, 2.6rem);
  margin-bottom: 20px;
  line-height: 1.2;
}

.section-header p {
  color: var(--gray-700);
  max-width: 720px;
  margin: 0 auto;
  font-size: 1.125rem;
  line-height: 1.7;
}

.grid {
  display: grid;
  gap: 40px;
}

.grid.two {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.card {
  background: var(--white);
  border-radius: 20px;
  padding: 40px;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  border: 1px solid var(--gray-200);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.025);
}

.card h3 {
  margin-bottom: 16px;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
}

.card p,
.card li {
  color: var(--gray-700);
  line-height: 1.7;
}

.chart-card {
  background: var(--white);
  padding: 32px;
  border-radius: 20px;
  border: 1px solid var(--gray-200);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
  min-height: 400px;
}

.chart-card--tall {
  min-height: 440px;
}

.chart-card canvas {
  width: 100% !important;
  height: 280px !important;
}

.chart-card--tall canvas {
  height: 320px !important;
}

.chart-card svg {
  width: 100%;
  height: 280px;
  display: block;
}

/* D3 axis and grid styling */
.d3-grid .tick line {
  stroke: var(--gridline);
  stroke-opacity: 1;
}

.d3-grid path.domain {
  stroke: none;
}

.d3-axis path.domain {
  stroke: var(--gray-200);
}

.d3-axis .tick text {
  fill: var(--gray-700);
  font-size: 12px;
}

.table-card {
  background: var(--white);
  border-radius: 20px;
  padding: 40px;
  border: 1px solid var(--gray-200);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
}

.table-header {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 32px;
  text-align: center;
}

.heatmap {
  display: grid;
  gap: 8px;
}

.heatmap-row {
  display: grid;
  grid-template-columns: 1.2fr 0.6fr 0.6fr;
  gap: 12px;
  align-items: center;
  background: var(--gray-100);
  padding: 12px 14px;
  border-radius: 10px;
}

.heat {
  text-align: center;
  padding: 6px 10px;
  border-radius: 8px;
  font-weight: 600;
  color: var(--white);
}

.heat.high {
  background: linear-gradient(120deg, #9d2b2b, #d88c8c);
}

.heat.mid {
  background: linear-gradient(120deg, #2b4c6f, #5f7ea7);
}

.timeline {
  margin-top: 24px;
  display: grid;
  gap: 18px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 16px;
  align-items: start;
  background: var(--white);
  padding: 16px 20px;
  border-radius: 14px;
  border: 1px solid var(--gray-200);
}

.timeline-year {
  font-weight: 700;
  color: var(--red-500);
}

.dashboard {
  display: grid;
  gap: 20px;
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: end;
}

.filters label {
  display: grid;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--gray-700);
}

.filters select {
  padding: 8px 12px;
  border-radius: 10px;
  border: 1px solid var(--gray-200);
}

.btn {
  padding: 10px 16px;
  border: none;
  border-radius: 10px;
  background: var(--blue-700);
  color: var(--white);
  cursor: pointer;
  font-weight: 600;
}

.btn.secondary {
  background: var(--red-500);
}

.dashboard-panels {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.metric-list {
  display: grid;
  gap: 10px;
  list-style: none;
}

.site-footer {
  background: var(--blue-900);
  color: var(--white);
  padding: 50px 0;
}

.footer-grid {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.footer-grid h3 {
  margin-bottom: 10px;
}

.footer-grid p {
  color: rgba(255, 255, 255, 0.7);
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@keyframes route {
  0% {
    stroke-dashoffset: 120;
  }
  100% {
    stroke-dashoffset: 0;
  }
}

@media (max-width: 900px) {
  .nav {
    display: none;
  }

  .hero-caption {
    position: static;
    margin-top: 12px;
    text-align: center;
  }
}

@media (max-width: 600px) {
  .hero {
    padding: 40px 0 60px;
  }

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

  .timeline-item {
    grid-template-columns: 1fr;
  }
}