:root {
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);

  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  --content-wide: 1200px;
}

/* ========== DARK MODE (default) ========== */
:root, [data-theme="dark"] {
  --color-bg:             #0f1117;
  --color-surface:        #161821;
  --color-surface-2:      #1c1f2b;
  --color-surface-offset: #1a1d28;
  --color-divider:        #262938;
  --color-border:         #2e3245;
  --color-text:           #e4e5eb;
  --color-text-muted:     #8b8f9e;
  --color-text-faint:     #555866;
  --color-text-inverse:   #0f1117;

  --color-primary:        #5ba4f5;
  --color-primary-hover:  #4090e8;
  --color-primary-active: #2a7ad4;
  --color-primary-dim:    rgba(91,164,245,0.12);

  --color-danger:         #f56565;
  --color-danger-dim:     rgba(245,101,101,0.12);
  --color-warning:        #eab543;
  --color-warning-dim:    rgba(234,181,67,0.12);
  --color-success:        #48bb78;
  --color-success-dim:    rgba(72,187,120,0.12);

  /* Choropleth scale - dark mode */
  --map-0: #1a1d28;
  --map-1: #1e2a3d;
  --map-2: #1f3652;
  --map-3: #204368;
  --map-4: #225080;
  --map-5: #2a6399;
  --map-6: #3578b2;
  --map-7: #4a8ec6;
  --map-8: #6aa5d8;
  --map-9: #91bfe6;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.5);
}

/* ========== LIGHT MODE ========== */
[data-theme="light"] {
  --color-bg:             #f5f6f8;
  --color-surface:        #ffffff;
  --color-surface-2:      #fafbfc;
  --color-surface-offset: #eef0f3;
  --color-divider:        #dde0e6;
  --color-border:         #c9cdd6;
  --color-text:           #1a1d28;
  --color-text-muted:     #6b7080;
  --color-text-faint:     #9ba0ad;
  --color-text-inverse:   #ffffff;

  --color-primary:        #2563eb;
  --color-primary-hover:  #1d4ed8;
  --color-primary-active: #1e40af;
  --color-primary-dim:    rgba(37,99,235,0.08);

  --color-danger:         #dc2626;
  --color-danger-dim:     rgba(220,38,38,0.08);
  --color-warning:        #d97706;
  --color-warning-dim:    rgba(217,119,6,0.08);
  --color-success:        #16a34a;
  --color-success-dim:    rgba(22,163,74,0.08);

  --map-0: #f0f4f8;
  --map-1: #d4e4f2;
  --map-2: #b8d4ec;
  --map-3: #9cc4e6;
  --map-4: #7ab3de;
  --map-5: #5a9fd4;
  --map-6: #3d8bc8;
  --map-7: #2876ba;
  --map-8: #1a62a8;
  --map-9: #0d4e94;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.12);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme]) {
    --color-bg:             #f5f6f8;
    --color-surface:        #ffffff;
    --color-surface-2:      #fafbfc;
    --color-surface-offset: #eef0f3;
    --color-divider:        #dde0e6;
    --color-border:         #c9cdd6;
    --color-text:           #1a1d28;
    --color-text-muted:     #6b7080;
    --color-text-faint:     #9ba0ad;
    --color-text-inverse:   #ffffff;
    --color-primary:        #2563eb;
    --color-primary-hover:  #1d4ed8;
    --color-primary-active: #1e40af;
    --color-primary-dim:    rgba(37,99,235,0.08);
    --color-danger:         #dc2626;
    --color-danger-dim:     rgba(220,38,38,0.08);
    --color-warning:        #d97706;
    --color-warning-dim:    rgba(217,119,6,0.08);
    --color-success:        #16a34a;
    --color-success-dim:    rgba(22,163,74,0.08);
    --map-0: #f0f4f8;
    --map-1: #d4e4f2;
    --map-2: #b8d4ec;
    --map-3: #9cc4e6;
    --map-4: #7ab3de;
    --map-5: #5a9fd4;
    --map-6: #3d8bc8;
    --map-7: #2876ba;
    --map-8: #1a62a8;
    --map-9: #0d4e94;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 12px 32px rgba(0,0,0,0.12);
  }
}

/* ========== HEADER ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-divider);
  backdrop-filter: blur(12px);
}
.header-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-3) var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}
.header-left {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.logo-icon {
  color: var(--color-primary);
  flex-shrink: 0;
}
.site-title {
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.02em;
}
.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.data-badge {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  background: var(--color-primary-dim);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  white-space: nowrap;
}
[data-theme-toggle] {
  color: var(--color-text-muted);
  padding: var(--space-2);
  border-radius: var(--radius-md);
}
[data-theme-toggle]:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
}

/* ========== KPI BAR ========== */
.kpi-bar {
  max-width: var(--content-wide);
  margin: var(--space-6) auto;
  padding: 0 var(--space-6);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
}
.kpi-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.kpi-value {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums lining-nums;
  letter-spacing: -0.02em;
}
.kpi-value.negative {
  color: var(--color-danger);
}
.kpi-label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
}
.kpi-sub {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* ========== MAP SECTION ========== */
.map-section {
  max-width: var(--content-wide);
  margin: 0 auto var(--space-8);
  padding: 0 var(--space-6);
}
.map-controls {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
}
.control-group {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.control-group label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-muted);
}
.toggle-group {
  display: flex;
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.toggle-btn {
  font-size: var(--text-xs);
  font-weight: 500;
  padding: var(--space-2) var(--space-4);
  color: var(--color-text-muted);
  border-right: 1px solid var(--color-divider);
  white-space: nowrap;
}
.toggle-btn:last-child { border-right: none; }
.toggle-btn:hover { color: var(--color-text); background: var(--color-surface-offset); }
.toggle-btn.active {
  color: var(--color-primary);
  background: var(--color-primary-dim);
  font-weight: 600;
}

.map-container {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
#map {
  width: 100%;
  aspect-ratio: 1.8 / 1;
  min-height: 400px;
}
#map svg {
  width: 100%;
  height: 100%;
}

.map-legend {
  position: absolute;
  bottom: var(--space-4);
  left: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-xs);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  box-shadow: var(--shadow-md);
}
.legend-title {
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}
.legend-scale {
  display: flex;
  gap: 0;
}
.legend-block {
  width: 28px;
  height: 14px;
}
.legend-block:first-child { border-radius: var(--radius-sm) 0 0 var(--radius-sm); }
.legend-block:last-child { border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
.legend-labels {
  display: flex;
  justify-content: space-between;
  color: var(--color-text-muted);
  font-variant-numeric: tabular-nums;
}

.map-note {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-3);
  text-align: center;
}

/* ========== TOOLTIP ========== */
.tooltip {
  position: fixed;
  pointer-events: none;
  z-index: 1000;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  box-shadow: var(--shadow-lg);
  font-size: var(--text-sm);
  max-width: 320px;
  opacity: 0;
  transition: opacity 120ms ease;
}
.tooltip.visible { opacity: 1; }
.tooltip-name {
  font-weight: 700;
  font-size: var(--text-sm);
  margin-bottom: var(--space-2);
  color: var(--color-text);
}
.tooltip-row {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  padding: 2px 0;
}
.tooltip-label { color: var(--color-text-muted); }
.tooltip-value {
  font-family: var(--font-mono);
  font-weight: 500;
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
}
.tooltip-value.danger { color: var(--color-danger); }
.tooltip-bar {
  margin-top: var(--space-2);
  height: 4px;
  background: var(--color-surface-offset);
  border-radius: var(--radius-full);
  overflow: hidden;
}
.tooltip-bar-fill {
  height: 100%;
  border-radius: var(--radius-full);
  transition: width 300ms ease;
}

/* ========== DETAILS SECTION ========== */
.details-section {
  max-width: var(--content-wide);
  margin: 0 auto var(--space-8);
  padding: 0 var(--space-6);
}
.details-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}
.detail-panel {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}
.detail-panel h3 {
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-4);
  color: var(--color-text);
}
.detail-hint {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}
.detail-stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}
.detail-stat {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.detail-stat-value {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
}
.detail-stat-value.danger { color: var(--color-danger); }
.detail-stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* Agency bars */
.agency-bars {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.agency-row {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.agency-row-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}
.agency-name {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
}
.agency-count {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-danger);
  font-variant-numeric: tabular-nums;
}
.agency-bar-track {
  height: 6px;
  background: var(--color-surface-offset);
  border-radius: var(--radius-full);
  overflow: hidden;
}
.agency-bar-fill {
  height: 100%;
  background: var(--color-danger);
  border-radius: var(--radius-full);
  transition: width 600ms cubic-bezier(0.16, 1, 0.3, 1);
  opacity: 0.7;
}

/* ========== METROS TABLE ========== */
.metros-section {
  max-width: var(--content-wide);
  margin: 0 auto var(--space-8);
  padding: 0 var(--space-6);
}
.metros-section h2 {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-2);
}
.section-desc {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  margin-bottom: var(--space-5);
  max-width: 72ch;
}
.metros-table-wrap {
  overflow-x: auto;
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
}
.metros-table {
  font-size: var(--text-sm);
  font-variant-numeric: tabular-nums lining-nums;
}
.metros-table th {
  text-align: left;
  font-weight: 600;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-divider);
  white-space: nowrap;
  position: sticky;
  top: 0;
  background: var(--color-surface);
}
.metros-table td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-divider);
  white-space: nowrap;
}
.metros-table tbody tr:hover {
  background: var(--color-primary-dim);
}
.metros-table tbody tr:last-child td {
  border-bottom: none;
}
.risk-badge {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  padding: 2px var(--space-2);
  border-radius: var(--radius-full);
}
.risk-badge.critical {
  background: var(--color-danger-dim);
  color: var(--color-danger);
}
.risk-badge.high {
  background: var(--color-warning-dim);
  color: var(--color-warning);
}
.risk-badge.moderate {
  background: var(--color-primary-dim);
  color: var(--color-primary);
}
.risk-badge.low {
  background: var(--color-success-dim);
  color: var(--color-success);
}

/* ========== METHODOLOGY ========== */
.methodology-section {
  max-width: var(--content-wide);
  margin: 0 auto var(--space-8);
  padding: 0 var(--space-6);
}
.methodology-section h2 {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-5);
}
.method-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
}
.method-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
}
.method-card h4 {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}
.method-card p {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ========== FOOTER ========== */
.site-footer {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-8) var(--space-6);
  border-top: 1px solid var(--color-divider);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}
.site-footer p {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}
.site-footer a {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-decoration: none;
}
.site-footer a:hover {
  color: var(--color-primary);
}

/* ========== RESPONSIVE ========== */
@media (max-width: 900px) {
  .kpi-bar { grid-template-columns: repeat(2, 1fr); }
  .details-grid { grid-template-columns: 1fr; }
  .method-grid { grid-template-columns: repeat(2, 1fr); }
  .data-badge { display: none; }
}
@media (max-width: 600px) {
  .kpi-bar { grid-template-columns: 1fr; }
  .method-grid { grid-template-columns: 1fr; }
  .toggle-group { flex-wrap: wrap; }
  .toggle-btn { flex: 1; text-align: center; }
  #map { min-height: 300px; aspect-ratio: 1.4 / 1; }
  .map-legend { position: static; margin: var(--space-3); }
}

/* ========== D3 MAP STYLES ========== */
.state-path {
  stroke: var(--color-divider);
  stroke-width: 0.5;
  cursor: pointer;
  transition: stroke 120ms ease, stroke-width 120ms ease;
}
.state-path:hover {
  stroke: var(--color-text);
  stroke-width: 1.5;
}
.state-path.active {
  stroke: var(--color-primary);
  stroke-width: 2;
}
.metro-dot {
  fill: var(--color-danger);
  stroke: var(--color-surface);
  stroke-width: 1.5;
  opacity: 0.85;
  cursor: pointer;
  transition: opacity 120ms ease;
}
.metro-dot:hover {
  opacity: 1;
}
.state-label {
  font-size: 9px;
  font-weight: 600;
  fill: var(--color-text);
  text-anchor: middle;
  pointer-events: none;
  opacity: 0.7;
}