:root {
  --bg: #f5efe3;
  --bg-deep: #efe4cf;
  --ink: #142628;
  --muted: #586766;
  --paper: rgba(255, 251, 245, 0.76);
  --paper-strong: rgba(255, 251, 245, 0.92);
  --accent: #0f6c74;
  --accent-soft: rgba(15, 108, 116, 0.12);
  --warm: #b85f35;
  --shadow: 0 18px 54px rgba(30, 38, 36, 0.12);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --max: 1240px;
  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Space Grotesk", "Noto Sans SC", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 18%, rgba(183, 138, 50, 0.18), transparent 26%),
    radial-gradient(circle at 88% 10%, rgba(15, 108, 116, 0.16), transparent 28%),
    linear-gradient(180deg, #fbf7ef 0%, var(--bg) 45%, var(--bg-deep) 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(20, 38, 40, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(20, 38, 40, 0.03) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.45), transparent 70%);
}

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

button {
  font: inherit;
}

.page-shell {
  width: min(calc(100% - 32px), var(--max));
  margin: 0 auto;
  padding-bottom: 56px;
}

.site-header {
  position: sticky;
  top: 16px;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-top: 18px;
  padding: 14px 18px;
  border: 1px solid rgba(20, 38, 40, 0.08);
  border-radius: 999px;
  background: rgba(255, 252, 246, 0.82);
  backdrop-filter: blur(14px);
  box-shadow: 0 10px 30px rgba(20, 38, 40, 0.08);
}

.brand {
  display: inline-flex;
  flex-direction: column;
  gap: 2px;
}

.brand-kicker {
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}

.brand-name {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
}

.site-nav {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.site-nav a {
  color: var(--muted);
  font-size: 0.95rem;
}

main {
  display: grid;
  gap: 34px;
  margin-top: 26px;
}

section {
  position: relative;
  overflow: hidden;
  padding: 28px;
  border: 1px solid rgba(20, 38, 40, 0.08);
  border-radius: var(--radius-xl);
  background: var(--paper);
  box-shadow: var(--shadow);
}

.hero {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 28px;
  padding: 34px;
}

.hero-copy,
.hero-panel,
.metric-card,
.country-card,
.method-card,
.research-card,
.paper-card,
.citation-card,
.download-item {
  animation: slide-up 700ms ease both;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--warm);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  font-family: var(--font-display);
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.4rem, 4.6vw, 4rem);
  line-height: 0.96;
}

h2 {
  font-size: clamp(1.7rem, 3vw, 2.5rem);
}

h3 {
  font-size: 1.16rem;
}

.hero-lede,
.section-heading p,
.metric-detail,
.method-card p,
.research-card p,
.site-footer,
#chart-caption {
  color: var(--muted);
  line-height: 1.7;
}

.hero-lede {
  max-width: 38rem;
  margin: 18px 0 0;
  font-size: 1.05rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 22px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
}

.button-primary {
  background: linear-gradient(135deg, var(--accent), #164d60);
  color: #f7fbfb;
}

.button-secondary {
  border-color: rgba(20, 38, 40, 0.14);
  background: rgba(255, 255, 255, 0.64);
}

.hero-note {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
  font-size: 0.92rem;
  color: var(--muted);
}

.hero-paper-citation {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

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

.metric-card {
  min-height: 150px;
  padding: 18px;
  border-radius: var(--radius-lg);
  background: var(--paper-strong);
  border: 1px solid rgba(20, 38, 40, 0.08);
}

.metric-card-primary {
  grid-column: 1 / -1;
  background: linear-gradient(160deg, rgba(15, 108, 116, 0.88), rgba(16, 71, 76, 0.94));
  color: #f4fbfb;
}

.metric-card-primary .metric-label,
.metric-card-primary .metric-detail {
  color: rgba(244, 251, 251, 0.84);
}

.metric-label {
  margin: 0;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.metric-value {
  margin: 14px 0 6px;
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  font-weight: 700;
  line-height: 1.05;
}

.coverage-band {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 16px;
  padding: 16px 18px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(20, 38, 40, 0.08);
  background: rgba(255, 255, 255, 0.62);
}

.coverage-band span {
  display: block;
  margin-bottom: 4px;
  font-size: 0.8rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.coverage-band strong {
  font-size: 1.12rem;
}

.section-heading {
  max-width: 48rem;
  margin-bottom: 22px;
}

.country-board,
.method-grid,
.research-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}

.country-card {
  position: relative;
  padding: 18px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(20, 38, 40, 0.08);
  background: rgba(255, 255, 255, 0.74);
  cursor: pointer;
}

.country-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  border-radius: 999px;
  background: var(--country-color, var(--accent));
}

.country-card.is-active {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(227, 244, 244, 0.88));
}

.country-card.is-placeholder {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.9), rgba(238, 236, 228, 0.88)),
    rgba(255, 255, 255, 0.74);
  border-style: dashed;
}

.country-card.is-placeholder::before {
  background:
    repeating-linear-gradient(
      180deg,
      var(--country-color, var(--accent)) 0 7px,
      rgba(20, 38, 40, 0.12) 7px 12px
    );
}

.country-card.is-placeholder .country-score {
  font-size: 1.4rem;
}

.country-card.is-placeholder .country-tone {
  color: var(--accent);
  font-weight: 600;
}

.country-meta {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 10px;
  font-size: 0.88rem;
  color: var(--muted);
}

.country-score {
  margin-top: 18px;
  font-size: 2rem;
  font-weight: 700;
}

.country-tone {
  margin-top: 6px;
  color: var(--muted);
}

.explorer-shell {
  padding: 18px;
  border-radius: calc(var(--radius-xl) - 6px);
  border: 1px solid rgba(20, 38, 40, 0.08);
  background: rgba(255, 255, 255, 0.6);
}

.explorer-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
}

.tabs,
.series-toggle {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.tab-button,
.toggle-button {
  min-height: 42px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid rgba(20, 38, 40, 0.12);
  background: rgba(255, 255, 255, 0.72);
  color: var(--muted);
  cursor: pointer;
}

.tab-button.is-active,
.toggle-button.is-active {
  border-color: rgba(15, 108, 116, 0.24);
  background: rgba(15, 108, 116, 0.1);
  color: var(--ink);
}

.tab-button.is-placeholder {
  border-style: dashed;
}

.chart-frame {
  margin-top: 18px;
  padding: 14px;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(252, 249, 242, 0.9), rgba(255, 255, 255, 0.74));
  border: 1px solid rgba(20, 38, 40, 0.08);
}

.chart {
  min-height: 540px;
}

.chart-foot {
  display: grid;
  gap: 10px;
  margin-top: 16px;
}

.event-chips {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.event-chip {
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(184, 95, 53, 0.12);
  color: #7b4b33;
  font-size: 0.88rem;
  font-weight: 600;
}

.method-card,
.research-card,
.download-item {
  padding: 20px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(20, 38, 40, 0.08);
  background: rgba(255, 255, 255, 0.74);
}

.research-card-teaser {
  background:
    linear-gradient(160deg, rgba(15, 108, 116, 0.12), rgba(184, 95, 53, 0.1)),
    rgba(255, 255, 255, 0.82);
  border-color: rgba(15, 108, 116, 0.18);
}

.research-card-teaser h3 {
  color: var(--accent);
}

.paper-card,
.citation-card {
  padding: 22px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(20, 38, 40, 0.08);
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 10px 24px rgba(20, 38, 40, 0.05);
}

.paper-card p,
.citation-card p {
  color: var(--muted);
  line-height: 1.7;
}

.paper-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.download-link-secondary {
  background: rgba(184, 95, 53, 0.1);
  color: var(--warm);
}

.citation-entry + .citation-entry {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid rgba(20, 38, 40, 0.08);
}

.citation-entry strong {
  display: block;
  margin-bottom: 6px;
}

.citation-entry a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.method-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin-bottom: 16px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 700;
}

.download-panel {
  display: block;
}

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

.download-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.download-item strong {
  display: block;
  margin-bottom: 4px;
}

.download-meta {
  color: var(--muted);
  font-size: 0.92rem;
}

.download-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 108px;
  padding: 12px 16px;
  border-radius: 999px;
  background: rgba(15, 108, 116, 0.1);
  color: var(--accent);
  font-weight: 700;
}

.download-link.is-disabled {
  background: rgba(20, 38, 40, 0.06);
  color: var(--muted);
  cursor: not-allowed;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
  margin-top: 26px;
  padding: 0 6px;
  font-size: 0.92rem;
}

.site-credit {
  position: fixed;
  right: 18px;
  bottom: 14px;
  z-index: 30;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(248, 245, 236, 0.88);
  border: 1px solid rgba(15, 58, 61, 0.12);
  backdrop-filter: blur(10px);
  color: rgba(33, 49, 50, 0.78);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: none;
  box-shadow: 0 10px 24px rgba(20, 38, 40, 0.08);
}

.site-visitors {
  position: fixed;
  left: 18px;
  bottom: 14px;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px 10px;
  border-radius: 18px;
  background: rgba(248, 245, 236, 0.88);
  border: 1px solid rgba(15, 58, 61, 0.12);
  backdrop-filter: blur(10px);
  box-shadow: 0 10px 24px rgba(20, 38, 40, 0.08);
}

.site-visitors img {
  display: block;
  max-width: min(220px, 38vw);
  height: auto;
}

.tone-negative {
  color: #a03e2a;
}

.tone-positive {
  color: #0f6c74;
}

.tone-neutral {
  color: #6a664d;
}

.tone-muted {
  color: var(--muted);
}

@keyframes slide-up {
  from {
    opacity: 0;
    transform: translateY(18px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 980px) {
  .hero,
  .download-panel {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .page-shell {
    width: min(calc(100% - 18px), var(--max));
  }

  .hero,
  section {
    padding: 22px;
  }

  .metric-grid,
  .coverage-band {
    grid-template-columns: 1fr;
  }

  .download-item {
    flex-direction: column;
    align-items: flex-start;
  }

  .site-credit {
    right: 12px;
    bottom: 12px;
    font-size: 0.72rem;
    padding: 7px 10px;
  }

  .site-visitors {
    left: 12px;
    bottom: 12px;
    padding: 6px 8px;
  }

  .site-visitors img {
    max-width: min(180px, 46vw);
  }
}