/* ── Tokens ──────────────────────────────────────────────── */
:root {
  --bg: #e8f0f7;
  --surface: rgba(255, 255, 255, 0.78);
  --border: rgba(30, 100, 180, 0.15);
  --accent: #1a6fbd;
  --accent2: #d94f1e;
  --text: #1a2b3c;
  --muted: #5577a0;
  --serif: "Playfair Display", Georgia, serif;
  --sans: "DM Sans", sans-serif;
  --max-prose: 900px;
  --max-chart: 1400px;
}

/* ── Reset / Base ────────────────────────────────────────── */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 1.05rem;
  overflow-x: hidden;
}

/* ── Globe Canvas ────────────────────────────────────────── */
#globe-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.45;
}

/* ── Sticky Nav ──────────────────────────────────────────── */
#topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(225, 237, 248, 0.94);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 2rem;
  gap: 1rem;
}
.topbar-left {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}
.topbar-right {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-left: auto;
}
.topbar-project {
  font-family: var(--serif);
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  color: var(--accent);
}
.topbar-meta {
  font-size: 0.72rem;
  color: var(--muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.topbar-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
  padding: 0.45rem 1.1rem;
  border-radius: 2px;
  font-family: var(--sans);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s, color 0.2s;
  white-space: nowrap;
}
.topbar-btn:hover {
  background: var(--accent);
  color: var(--bg);
}
.topbar-btn svg {
  flex-shrink: 0;
}

/* ── Page Wrapper ────────────────────────────────────────── */
.page {
  position: relative;
  z-index: 1;
  padding-bottom: 6rem;
}

/* ── Hero Header ─────────────────────────────────────────── */
.hero {
  text-align: center;
  padding: 5rem 2rem 3.5rem;
  max-width: var(--max-chart);
  margin: 0 auto;
}
.hero-eyebrow {
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.2rem;
}
.hero h1 {
  font-family: var(--serif);
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.15;
  color: #0d1e2e;
  margin-bottom: 1rem;
}
.hero h1 em {
  font-style: italic;
  color: var(--accent2);
}
.hero-subtitle {
  font-size: 1.15rem;
  color: var(--muted);
  font-weight: 300;
  max-width: 520px;
  margin: 0 auto;
}
.hero-divider {
  width: 48px;
  height: 2px;
  background: var(--accent);
  margin: 2.2rem auto 0;
  opacity: 0.6;
}

/* ── Content Sections ────────────────────────────────────── */
section {
  max-width: var(--max-chart);
  margin: 0 auto;
  padding: 0 2rem;
}

/* ── Prose Block ─────────────────────────────────────────── */
.prose {
  max-width: var(--max-prose);
  margin: 3rem auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  padding: 1.6rem 2rem;
  border-radius: 2px;
}
.prose p {
  color: var(--text);
  font-weight: 300;
}
.prose p + p {
  margin-top: 1em;
}

/* ── Section Label ───────────────────────────────────────── */
.section-label {
  max-width: var(--max-prose);
  margin: 4rem auto 0;
  padding: 0 0 0.5rem;
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  border-bottom: 1px solid var(--border);
}

/* ── Chart Grids ─────────────────────────────────────────── */
.chart-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem;
  margin: 2rem 0;
}
.chart-single {
  margin: 2rem 0;
}

.chart-grid-2-disasters {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: start;
  gap: 1.2rem;
  margin: 2rem 0;
}
.chart-single {
  margin: 2rem 0;
}

/* ── Chart Placeholder ───────────────────────────────────── */
.chart-placeholder {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 3px;
  min-height: 340px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.8rem;
  position: relative;
  overflow: hidden;
}
.chart-placeholder::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    -45deg,
    transparent,
    transparent 12px,
    rgba(77, 184, 255, 0.025) 12px,
    rgba(77, 184, 255, 0.025) 13px
  );
}
.chart-placeholder-icon {
  width: 42px;
  height: 42px;
  opacity: 0.25;
  color: var(--accent);
}
.chart-placeholder-label {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}
.chart-placeholder-sub {
  font-size: 0.68rem;
  color: rgba(122, 153, 187, 0.55);
}

.chart-placeholder--iframe {
  min-height: 0;
  background: transparent;
  border: none;
  width: fit-content;
  overflow: visible;
}

.chart-placeholder--iframe-disaster {
  width: 100%;
}

.chart-placeholder--iframe::before {
  display: none;
}

/* Caption under charts */
.chart-caption {
  font-size: 0.72rem;
  color: var(--muted);
  text-align: center;
  margin-top: 0.55rem;
  font-style: italic;
}

/* ── Closing Paragraphs ──────────────────────────────────── */
.prose-pair {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: var(--max-prose);
  margin: 3rem auto;
}
.prose-pair .prose {
  max-width: 100%;
}

/* ── Footer ──────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  text-align: center;
  padding: 2.5rem 2rem;
  font-size: 0.72rem;
  color: var(--muted);
  letter-spacing: 0.05em;
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 720px) {
  .chart-grid-2 {
    grid-template-columns: 1fr;
  }
  .prose-pair {
    grid-template-columns: 1fr;
  }
  #topbar {
    flex-wrap: wrap;
    gap: 0.5rem;
  }
}