:root {
  --bg: #07111f;
  --bg-soft: #0d1b2f;
  --panel: rgba(9, 22, 39, 0.82);
  --panel-strong: rgba(12, 27, 47, 0.96);
  --line: rgba(149, 184, 219, 0.17);
  --ink: #eef5ff;
  --muted: #9eb3c9;
  --accent: #ff8a3d;
  --teal: #5fe1cf;
  --gold: #ffd166;
  --danger: #ff5661;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.34);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 0% 0%, rgba(255, 138, 61, 0.22), transparent 28%),
    radial-gradient(circle at 100% 0%, rgba(95, 225, 207, 0.18), transparent 30%),
    radial-gradient(circle at 50% 100%, rgba(255, 209, 102, 0.11), transparent 32%),
    linear-gradient(180deg, #040b15 0%, #07111f 45%, #081425 100%);
}

.page-shell {
  width: min(1480px, 94%);
  margin: 0 auto;
  padding: 28px 0 44px;
}

.hero,
.signal-strip,
.atlas-grid,
.analysis-grid,
.spotlight-grid {
  display: grid;
  gap: 18px;
}

.hero {
  grid-template-columns: 1.25fr 1fr;
  align-items: stretch;
}

.hero-copy,
.metric-card,
.signal-card,
.panel,
.methods-panel,
.formula-card {
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.hero-copy,
.panel,
.methods-panel {
  border-radius: 28px;
}

.metric-card,
.signal-card,
.formula-card {
  border-radius: 22px;
}

.hero-copy {
  padding: 28px;
  position: relative;
  overflow: hidden;
}

.hero-copy::after {
  content: "";
  position: absolute;
  inset: auto -80px -110px auto;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 138, 61, 0.32), transparent 70%);
  pointer-events: none;
}

.eyebrow,
.panel-kicker,
.metric-label,
.mini-label,
.field span,
.signal-title {
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.74rem;
  color: var(--muted);
}

h1,
h2,
h3 {
  margin: 0;
  font-family: "Fraunces", serif;
  letter-spacing: -0.03em;
  line-height: 0.98;
}

h1 {
  margin-top: 10px;
  font-size: clamp(2.7rem, 5vw, 5rem);
  max-width: 9ch;
}

h2 {
  font-size: clamp(1.8rem, 3vw, 2.8rem);
}

h3 {
  font-size: 1.6rem;
}

.intro,
.section-copy,
.panel-copy,
.methods-copy,
.signal-card p,
.metric-card p,
.spotlight-summary,
.story-copy {
  color: var(--muted);
  line-height: 1.72;
}

.intro {
  max-width: 72ch;
  margin: 18px 0 0;
  font-size: 1.03rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.hero-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), #ffb36d);
  color: #08101c;
  font-weight: 700;
  text-decoration: none;
}

.hero-link.secondary {
  background: rgba(255, 255, 255, 0.04);
  color: var(--ink);
  border: 1px solid var(--line);
}

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

.metric-card {
  padding: 20px;
}

.metric-card strong {
  display: block;
  margin-top: 10px;
  font-size: 1.6rem;
}

.metric-card p {
  margin: 10px 0 0;
  font-size: 0.95rem;
}

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

.signal-card {
  padding: 18px 20px;
}

.signal-title {
  margin: 0;
}

.signal-card p {
  margin: 10px 0 0;
}

.atlas-shell,
.methods-panel {
  margin-top: 22px;
}

.section-head {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: end;
  margin-bottom: 16px;
}

.section-copy {
  margin: 0;
  max-width: 54ch;
}

.control-bar {
  display: grid;
  grid-template-columns: 220px 160px 1fr;
  gap: 14px;
  margin-bottom: 16px;
}

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

select,
.toggle {
  font: inherit;
}

select {
  width: 100%;
  min-height: 48px;
  padding: 0 14px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.06);
  color: var(--ink);
}

.toggle-group {
  display: inline-flex;
  gap: 8px;
  justify-content: end;
  align-items: end;
}

.toggle {
  min-height: 48px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  color: var(--ink);
  cursor: pointer;
}

.toggle.active {
  background: linear-gradient(135deg, rgba(95, 225, 207, 0.28), rgba(95, 225, 207, 0.12));
  border-color: rgba(95, 225, 207, 0.42);
}

.atlas-grid {
  grid-template-columns: 1.55fr 0.95fr;
}

.panel {
  overflow: hidden;
}

.panel-head {
  padding: 18px 20px 12px;
  border-bottom: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
}

.legend-box {
  display: grid;
  grid-template-columns: auto 170px auto;
  gap: 10px;
  align-items: center;
  color: var(--muted);
  font-size: 0.82rem;
}

.legend-ramp {
  height: 14px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.burden-ramp {
  background: linear-gradient(90deg, #163a5f, #2ec4b6, #ffd166, #ff7f50);
}

.coverage-ramp {
  background: linear-gradient(90deg, #ff6268, #ffb356, #e4f27d, #5fe1cf);
}

.blind_spots-ramp {
  background: linear-gradient(90deg, #1c2d48, #7241ff, #d150ff, #ff5661);
}

.map-wrap {
  padding: 18px;
  position: relative;
}

svg {
  width: 100%;
  display: block;
}

#world-map {
  min-height: 500px;
  border-radius: 22px;
  background:
    linear-gradient(180deg, rgba(9, 25, 43, 0.92), rgba(8, 20, 36, 0.98)),
    radial-gradient(circle at 15% 20%, rgba(95, 225, 207, 0.12), transparent 32%);
}

.tooltip {
  position: absolute;
  pointer-events: none;
  max-width: 250px;
  padding: 12px 14px;
  border-radius: 16px;
  background: rgba(6, 13, 24, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--ink);
  font-size: 0.9rem;
  line-height: 1.5;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
}

.spotlight-panel .panel-head {
  padding-bottom: 16px;
}

.spotlight-grid {
  padding: 18px 20px 0;
  grid-template-columns: 1fr 220px;
  align-items: center;
}

.spotlight-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.spotlight-metrics article,
.meter-card {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  border-radius: 20px;
}

.spotlight-metrics article {
  padding: 14px;
}

.spotlight-metrics strong {
  display: block;
  margin-top: 8px;
  font-size: 1.2rem;
}

.label-with-help {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.help-btn {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.06);
  color: var(--ink);
  font: inherit;
  font-size: 0.78rem;
  font-weight: 700;
  cursor: pointer;
  line-height: 1;
}

.help-panel {
  margin-top: 14px;
  padding: 14px 16px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
}

.help-title {
  margin: 0;
  color: var(--gold);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

.help-body {
  margin: 8px 0 0;
  color: var(--muted);
  line-height: 1.68;
}

.meter-card {
  padding: 18px;
  text-align: center;
}

.meter-ring {
  position: relative;
  width: 120px;
  height: 120px;
  margin: 0 auto;
}

.meter-track,
.meter-progress {
  fill: none;
  stroke-width: 12;
}

.meter-track {
  stroke: rgba(255, 255, 255, 0.08);
}

.meter-progress {
  stroke: #5fe1cf;
  stroke-linecap: round;
  stroke-dasharray: 264;
  stroke-dashoffset: 264;
  transform: rotate(-90deg);
  transform-origin: 60px 60px;
}

.meter-value {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-family: "Fraunces", serif;
}

.meter-value span {
  font-size: 2rem;
}

.meter-label {
  margin: 12px 0 0;
  color: var(--muted);
}

.story-box {
  margin: 18px 20px 20px;
  padding: 16px 18px;
  border-radius: 22px;
  border: 1px solid var(--line);
  background:
    linear-gradient(135deg, rgba(255, 138, 61, 0.08), rgba(255, 255, 255, 0.03)),
    rgba(255, 255, 255, 0.02);
}

.story-title {
  margin: 0;
  font-size: 0.92rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.story-copy {
  margin: 10px 0 0;
}

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

.analysis-grid.lower {
  margin-top: 18px;
}

.panel-copy {
  margin: 0;
  padding: 0 20px 6px;
}

#scatterplot,
#ranking-chart,
#trend-chart {
  min-height: 380px;
  padding: 6px 20px 22px;
}

#trend-chart {
  min-height: 340px;
}

.source-panel {
  display: flex;
  flex-direction: column;
}

.score-explainer {
  margin-top: 18px;
}

.score-grid,
.simple-steps {
  display: grid;
  gap: 16px;
}

.score-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  padding: 18px 20px 0;
}

.score-card,
.step-card,
.toy-example,
.child-note {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  border-radius: 22px;
}

.score-card,
.toy-example,
.child-note {
  padding: 18px;
}

.score-card h4,
.toy-example h4 {
  margin: 0;
  font-family: "Fraunces", serif;
  font-size: 1.3rem;
}

.score-card p,
.step-card p,
.toy-example p,
.child-note {
  color: var(--muted);
  line-height: 1.72;
}

.kid-formula {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-top: 16px;
}

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 14px;
  border-radius: 999px;
  font-weight: 700;
}

.pill.good {
  background: rgba(95, 225, 207, 0.16);
  color: #baf8ef;
}

.pill.bad {
  background: rgba(255, 86, 97, 0.16);
  color: #ffb8bd;
}

.operator {
  color: var(--gold);
  font-size: 1.2rem;
  font-weight: 700;
}

.meter-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 10px;
  align-items: center;
  margin-top: 16px;
  color: var(--muted);
  font-size: 0.9rem;
}

.mini-ramp {
  height: 14px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.small-note {
  margin: 14px 0 0;
}

.kid-stack {
  display: grid;
  gap: 10px;
  margin-top: 16px;
}

.stack-row {
  display: grid;
  grid-template-columns: 1.5fr 1fr auto;
  gap: 12px;
  align-items: center;
}

.stack-label,
.stack-value {
  font-size: 0.9rem;
}

.stack-label {
  color: var(--ink);
}

.stack-value {
  color: var(--muted);
  font-weight: 700;
}

.stack-bar {
  height: 14px;
  border-radius: 999px;
}

.burden-fill {
  background: linear-gradient(90deg, #ffb56f, #ff8a3d);
}

.coverage-gap-fill {
  background: linear-gradient(90deg, #ffd166, #f6e05e);
}

.uncertainty-fill {
  background: linear-gradient(90deg, #ff8892, #ff5661);
}

.staleness-fill {
  background: linear-gradient(90deg, #7aa6ff, #4b74e6);
}

.sparsity-fill {
  background: linear-gradient(90deg, #ca8dff, #9b5cff);
}

.simple-steps {
  grid-template-columns: repeat(5, minmax(0, 1fr));
  padding: 18px 20px 0;
}

.step-card {
  padding: 16px;
}

.step-card strong {
  display: block;
  line-height: 1.5;
}

.toy-example,
.child-note {
  margin: 18px 20px 0;
}

.child-note {
  margin-bottom: 20px;
  background:
    linear-gradient(135deg, rgba(95, 225, 207, 0.08), rgba(255, 209, 102, 0.08)),
    rgba(255, 255, 255, 0.03);
}

.source-grid {
  padding: 18px 20px 22px;
  display: grid;
  gap: 12px;
}

.source-card {
  padding: 14px 16px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
}

.source-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.source-card a {
  color: var(--teal);
  text-decoration: none;
  font-weight: 700;
}

.methods-panel {
  padding: 22px;
}

.note-banner,
.method-card {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  border-radius: 22px;
}

.note-banner {
  padding: 16px 18px;
  margin-top: 10px;
  color: var(--ink);
  line-height: 1.65;
}

.method-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.method-card {
  padding: 18px;
}

.method-card.full-span {
  grid-column: 1 / -1;
}

.method-card h3 {
  font-size: 1.35rem;
}

.method-card p {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.72;
}

.method-list {
  margin: 14px 0 0;
  padding-left: 20px;
  color: var(--muted);
}

.method-list li {
  margin: 0 0 10px;
  line-height: 1.7;
}

.references a {
  color: var(--teal);
  text-decoration: none;
  font-weight: 700;
}

.formula-card {
  padding: 16px 18px;
  margin-top: 12px;
}

code {
  display: block;
  color: var(--ink);
  font-family: "IBM Plex Sans", monospace;
  white-space: pre-wrap;
  line-height: 1.7;
}

.country {
  cursor: pointer;
  transition: opacity 150ms ease, stroke-width 150ms ease;
}

.country.dimmed {
  opacity: 0.35;
}

.axis text,
.axis path,
.axis line,
.chart-label,
.value-label {
  color: var(--muted);
  fill: var(--muted);
  font-size: 0.82rem;
}

.grid-line {
  stroke: rgba(255, 255, 255, 0.08);
  stroke-dasharray: 3 4;
}

.dot-label {
  fill: var(--ink);
  font-size: 0.72rem;
}

@media (max-width: 1100px) {
  .hero,
  .atlas-grid,
  .analysis-grid,
  .signal-strip,
  .method-grid,
  .score-grid,
  .simple-steps {
    grid-template-columns: 1fr;
  }

  .control-bar {
    grid-template-columns: 1fr 1fr;
  }

  .toggle-group {
    grid-column: 1 / -1;
    justify-content: start;
  }

  .spotlight-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .page-shell {
    width: min(94%, 94%);
  }

  .hero-metrics,
  .spotlight-metrics,
  .control-bar {
    grid-template-columns: 1fr;
  }

  .legend-box {
    grid-template-columns: 1fr;
    justify-items: start;
  }

  #world-map {
    min-height: 380px;
  }
}