/* ═══════════════════════════════════════════════════════════
   GLOBAL HEALTH ATLAS · Design System
   ═══════════════════════════════════════════════════════════ */

:root {
  --bg:          #080810;
  --surface:     #0f0f1a;
  --surface2:    #161625;
  --surface3:    #1e1e30;
  --border:      #2a2a40;
  --border2:     #3a3a55;
  --text:        #e2e2ee;
  --text-dim:    #8888aa;
  --accent:      #f0c040;
  --accent2:     #60c8f0;
  --accent3:     #f06080;

  /* Region palette — shared across all pages */
  --c-africa:    #e84545;
  --c-asia:      #f0a030;
  --c-cam:       #f0d030;
  --c-eu:        #50b0f0;
  --c-me:        #d060e0;
  --c-na:        #40d0a0;
  --c-oceania:   #60e060;
  --c-roe:       #6080f0;
  --c-sa:        #f07040;
}

/* ── Light theme ────────────────────────────────────────── */
[data-theme="light"] {
  --bg:       #f2f2f7;
  --surface:  #ffffff;
  --surface2: #e8e8f0;
  --surface3: #dcdce8;
  --border:   #ccccdd;
  --border2:  #b0b0c8;
  --text:     #1a1a2e;
  --text-dim: #5a5a7a;
  --accent:   #b8860b;
  --accent2:  #0070a8;
  --accent3:  #c02050;
}

[data-theme="light"] html,
[data-theme="light"] body {
  background: var(--bg);
  color: var(--text);
}

[data-theme="light"] #nav {
  background: rgba(242,242,247,0.96);
}

[data-theme="light"] #tooltip {
  background: rgba(255,255,255,0.98);
}

[data-theme="light"] .regression-line {
  stroke: rgba(0,0,0,0.2);
}

[data-theme="light"] svg text          { fill: var(--text); }
[data-theme="light"] .axis text        { fill: var(--text-dim); }
[data-theme="light"] .axis path,
[data-theme="light"] .axis line        { stroke: var(--border2); }
[data-theme="light"] .gridline         { stroke: var(--border); }

/* ── Theme toggle button ─────────────────────────────────── */
#theme-toggle {
  background: none;
  border: 1px solid var(--border2);
  border-radius: 50%;
  color: var(--text-dim);
  font-size: 16px;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s, color 0.2s;
  flex-shrink: 0;
  line-height: 1;
}
#theme-toggle:hover {
  border-color: var(--accent);
  background: var(--surface2);
  color: var(--accent);
}

/* ── Reset ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  font-weight: 300;
  overflow-x: hidden;
  scroll-behavior: smooth;
  min-height: 100vh;
}

/* ── Navigation ────────────────────────────────────────── */
#nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(8,8,16,0.94);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 40px;
  height: 60px;
  gap: 20px;
}

.nav-brand {
  font-family: 'Playfair Display', serif;
  font-size: 17px;
  font-weight: 700;
  color: var(--accent);
  white-space: nowrap;
  flex-shrink: 0;
}
.nav-brand span {
  color: var(--text-dim);
  font-weight: 400;
  font-size: 13px;
}

.nav-pages {
  display: flex;
  gap: 2px;
}
.nav-btn {
  background: none;
  border: none;
  color: var(--text-dim);
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  font-weight: 400;
  padding: 6px 14px;
  cursor: pointer;
  border-radius: 4px;
  transition: all 0.2s;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  white-space: nowrap;
}
.nav-btn:hover  { color: var(--text); background: var(--surface2); }
.nav-btn.active { color: var(--accent); background: var(--surface2); border: 1px solid var(--border2); }

/* ── Loading screen ─────────────────────────────────────── */
#loading-screen {
  position: fixed;
  inset: 0;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 9000;
  gap: 20px;
  transition: opacity 0.5s;
}
#loading-screen.hidden { opacity: 0; pointer-events: none; }
.loading-title {
  font-family: 'Playfair Display', serif;
  font-size: 28px;
  font-weight: 900;
  color: var(--accent);
}
.loading-sub {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--text-dim);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.loading-bar-track {
  width: 240px;
  height: 3px;
  background: var(--surface3);
  border-radius: 2px;
  overflow: hidden;
}
.loading-bar-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
  width: 0%;
  transition: width 0.4s ease;
}

/* ── Pages ──────────────────────────────────────────────── */
.page {
  display: none;
  min-height: 100vh;
  padding: 80px 40px 48px;
  max-width: 1400px;
  margin: 0 auto;
}
.page.active { display: block; }

.page-header { margin-bottom: 28px; }

.page-number {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: var(--accent);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 6px;
}
.page-title {
  font-family: 'Playfair Display', serif;
  font-size: clamp(26px, 3vw, 40px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
}
.page-subtitle {
  color: var(--text-dim);
  font-size: 14px;
  margin-top: 7px;
  max-width: 700px;
  line-height: 1.65;
}

/* ── Stat cards ─────────────────────────────────────────── */
.stat-cards {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 14px 18px;
  flex: 1;
  min-width: 130px;
}
.stat-card-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-dim);
  margin-bottom: 4px;
}
.stat-card-value {
  font-family: 'Playfair Display', serif;
  font-size: 26px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}
.stat-card-sub {
  font-size: 11px;
  color: var(--text-dim);
  margin-top: 3px;
}

/* ── Controls bar ───────────────────────────────────────── */
.controls {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 16px;
  padding: 12px 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
}
.ctrl-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}
.ctrl-divider {
  width: 1px;
  height: 24px;
  background: var(--border);
  flex-shrink: 0;
}

select {
  background: var(--surface2);
  border: 1px solid var(--border2);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  font-size: 12px;
  border-radius: 4px;
  padding: 5px 10px;
  cursor: pointer;
  outline: none;
  transition: border-color 0.2s;
  appearance: none;
  padding-right: 24px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%238888aa'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
}
select:hover, select:focus { border-color: var(--accent); }

input[type=range] {
  -webkit-appearance: none;
  appearance: none;
  width: 160px;
  height: 4px;
  background: var(--surface3);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  box-shadow: 0 0 6px rgba(240,192,64,0.4);
}
input[type=range]::-moz-range-thumb {
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: none;
  cursor: pointer;
}

.year-display {
  font-family: 'JetBrains Mono', monospace;
  font-size: 20px;
  font-weight: 500;
  color: var(--accent);
  min-width: 48px;
}

.btn {
  background: var(--surface2);
  border: 1px solid var(--border2);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  font-size: 12px;
  padding: 6px 16px;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}
.btn:hover        { border-color: var(--accent); color: var(--accent); }
.btn.playing      { border-color: var(--accent3); color: var(--accent3); }

/* Toggle button group */
.toggle-group {
  display: flex;
  border: 1px solid var(--border2);
  border-radius: 4px;
  overflow: hidden;
}
.toggle-btn {
  background: none;
  border: none;
  color: var(--text-dim);
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  padding: 6px 12px;
  cursor: pointer;
  transition: all 0.2s;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-right: 1px solid var(--border2);
}
.toggle-btn:last-child { border-right: none; }
.toggle-btn.active { background: var(--surface2); color: var(--accent); }
.toggle-btn:hover:not(.active) { background: var(--surface2); color: var(--text); }

/* ── Chart containers ───────────────────────────────────── */
.chart-container {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  position: relative;
}

/* ── SVG / Axis defaults ────────────────────────────────── */
svg text { fill: var(--text); font-family: 'DM Sans', sans-serif; }

.axis path, .axis line { stroke: var(--border2); }
.axis text {
  fill: var(--text-dim);
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
}
.gridline {
  stroke: var(--border);
  stroke-dasharray: 2,5;
}
.axis-label {
  fill: var(--text-dim) !important;
  font-family: 'DM Sans', sans-serif !important;
  font-size: 12px !important;
}
.regression-line {
  stroke: rgba(255,255,255,0.25);
  stroke-width: 1.5;
  stroke-dasharray: 6,4;
  fill: none;
  pointer-events: none;
}
.focus-line {
  stroke: var(--text-dim);
  stroke-width: 1;
  stroke-dasharray: 3,4;
  pointer-events: none;
}

/* ── Tooltip ────────────────────────────────────────────── */
#tooltip {
  position: fixed;
  pointer-events: none;
  background: rgba(22,22,37,0.97);
  border: 1px solid var(--border2);
  border-radius: 7px;
  padding: 11px 15px;
  font-size: 12px;
  line-height: 1.6;
  box-shadow: 0 10px 40px rgba(0,0,0,0.6);
  z-index: 9999;
  min-width: 190px;
  max-width: 255px;
  display: none;
  backdrop-filter: blur(10px);
  /* Centre-of-screen positioning — JS sets left/top to exact centre */
  transform: none;
  transition: opacity 0.12s ease;
}
#tooltip.visible {
  display: block;
  animation: tt-fade-in 0.12s ease;
}
@keyframes tt-fade-in {
  from { opacity: 0; transform: scale(0.97); }
  to   { opacity: 1; transform: scale(1); }
}
.tt-country {
  font-family: 'Playfair Display', serif;
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 2px;
}
.tt-region {
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  margin-bottom: 7px;
  font-family: 'JetBrains Mono', monospace;
}
.tt-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.tt-label { color: var(--text-dim); font-size: 10px; }
.tt-value {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--accent);
  font-weight: 500;
}
.tt-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 5px 0;
}

/* ── Legend ─────────────────────────────────────────────── */
.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin-top: 14px;
  padding: 10px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
}
.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--text-dim);
  cursor: pointer;
  transition: color 0.15s;
}
.legend-item:hover { color: var(--text); }
.legend-dot {
  width: 9px; height: 9px;
  border-radius: 50%;
  flex-shrink: 0;
}
.legend-item.dimmed { opacity: 0.3; }

/* ── Small multiples (Page 2) ───────────────────────────── */
.small-multiples { display: flex; flex-direction: column; gap: 2px; }
.sm-chart { background: var(--surface); border: 1px solid var(--border); }
.sm-chart:first-child { border-radius: 8px 8px 0 0; }
.sm-chart:last-child  { border-radius: 0 0 8px 8px; }
.sm-chart-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-dim);
  padding: 10px 16px 0;
  display: flex;
  gap: 10px;
  align-items: baseline;
}
.sm-chart-label .metric-name { color: var(--text); }

/* ── Colorbar ────────────────────────────────────────────── */
.colorbar-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 12px;
  padding: 0 16px;
}
.colorbar-end {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: var(--text-dim);
  white-space: nowrap;
}
.colorbar-title {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: var(--accent);
  margin-left: 8px;
  white-space: nowrap;
}

/* ── Page footer ────────────────────────────────────────── */
.page-footer {
  margin-top: 32px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}
.page-footer-credit {
  color: var(--border2);
  font-size: 8px;
}

/* ── Heatmap (Page 5) ───────────────────────────────────── */
.heatmap-cell { cursor: pointer; }
.heatmap-cell:hover { filter: brightness(1.2); }

/* ── Insights box (Page 5) ──────────────────────────────── */
.insights-box {
  margin-top: 18px;
  padding: 18px 22px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
}
.insights-box h3 {
  font-family: 'Playfair Display', serif;
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 10px;
}
.insights-box p {
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.8;
}
.corr-pos { color: var(--accent2); }
.corr-neg { color: var(--accent3); }

/* ── Map no-data ────────────────────────────────────────── */
.map-no-data {
  padding: 60px;
  text-align: center;
  color: var(--text-dim);
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  line-height: 2;
}

/* ── Scrollbar ──────────────────────────────────────────── */
::-webkit-scrollbar { width: 5px; background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }

/* ── Country path hover ─────────────────────────────────── */
.country-path { cursor: pointer; }

/* ── Error banner ───────────────────────────────────────── */
.error-banner {
  background: rgba(232,69,69,0.12);
  border: 1px solid #e84545;
  border-radius: 6px;
  padding: 14px 18px;
  font-size: 13px;
  color: #f08080;
  margin-bottom: 16px;
}


/* ═══════════════════════════════════════════════════════════
   RESPONSIVE BREAKPOINTS
   ═══════════════════════════════════════════════════════════ */

/* ── Tablet  (≤ 1024px) ─────────────────────────────────── */
@media (max-width: 1024px) {
  #nav {
    padding: 0 20px;
    gap: 12px;
  }

  .nav-brand span { display: none; }

  .nav-btn {
    font-size: 9px;
    padding: 5px 10px;
  }

  .page {
    padding: 80px 24px 40px;
  }

  .stat-card {
    min-width: 110px;
    padding: 12px 14px;
  }

  .stat-card-value { font-size: 22px; }

  /* SVG charts — allow shorter height on smaller screens */
  #p1-map-svg  { height: 420px !important; }
  #p3-svg      { height: 420px !important; }
  #p4-svg      { height: auto  !important; }
}

/* ── Large mobile  (≤ 768px) ────────────────────────────── */
@media (max-width: 768px) {
  /* Nav — stack brand above pages on very narrow screens */
  #nav {
    height: auto;
    flex-wrap: wrap;
    padding: 10px 16px;
    gap: 8px;
  }

  .nav-brand {
    font-size: 14px;
    width: 100%;
  }

  .nav-pages {
    gap: 2px;
    flex-wrap: wrap;
  }

  .nav-btn {
    font-size: 8px;
    padding: 4px 8px;
    letter-spacing: 0.03em;
  }

  /* Push page content below the taller nav */
  .page { padding-top: 100px; }

  .page-title { font-size: clamp(20px, 5vw, 28px); }

  .page-subtitle { font-size: 13px; }

  /* Stat cards — two per row */
  .stat-cards { gap: 8px; }
  .stat-card  { min-width: calc(50% - 4px); flex: none; }
  .stat-card-value { font-size: 20px; }

  /* Controls — wrap tightly */
  .controls {
    gap: 10px;
    padding: 10px 12px;
  }

  .ctrl-divider { display: none; }

  input[type=range] { width: 120px; }

  /* Charts */
  #p1-map-svg { height: 300px !important; }
  #p3-svg     { height: 360px !important; }

  /* Heatmap — allow horizontal scroll on small screens */
  .chart-container { overflow-x: auto; }

  /* Legend — denser wrap */
  .legend { gap: 6px 12px; padding: 8px 10px; }
  .legend-item { font-size: 10px; }

  /* Footer */
  .page-footer { font-size: 8px; flex-direction: column; align-items: flex-start; gap: 4px; }

  /* Colorbar */
  .colorbar-wrap { padding: 0 8px; }
}

/* ── Small mobile  (≤ 480px) ────────────────────────────── */
@media (max-width: 480px) {
  .nav-btn { font-size: 7px; padding: 4px 6px; }

  .page { padding: 110px 12px 32px; }

  /* Stat cards — full width stack */
  .stat-card { min-width: 100%; }

  .page-title  { font-size: 20px; }
  .page-subtitle { font-size: 12px; }

  .controls { gap: 8px; padding: 8px 10px; }

  input[type=range] { width: 100px; }

  .year-display { font-size: 16px; }

  select { font-size: 11px; }

  #p1-map-svg { height: 240px !important; }
  #p3-svg     { height: 300px !important; }

  /* Tooltip — full width on tiny screens */
  #tooltip {
    min-width: calc(100vw - 32px);
    max-width: calc(100vw - 32px);
    font-size: 11px;
  }

  .tt-country { font-size: 13px; }

  /* Insights box */
  .insights-box { padding: 14px 14px; }
  .insights-box h3 { font-size: 14px; }
  .insights-box p  { font-size: 12px; }
}

/* ── Ensure charts never overflow viewport width ────────── */
svg {
  max-width: 100%;
}

/* ── Map zoom & pan ─────────────────────────────────────── */
#p1-map-svg {
  cursor: grab;
}
#p1-map-svg:active {
  cursor: grabbing;
}

/* Zoom control buttons inherit theme colours via inline styles;
   this rule just removes the default focus outline on them. */
#p1-zoom-controls button:focus {
  outline: none;
}