/* ═══════════════════════════════════════════════════════
   Data Availability Heatmap — Design System
   Atmospheric dark theme with editorial precision
   ═══════════════════════════════════════════════════════ */

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

:root {
  /* Atmospheric Dark Palette */
  --bg-deep: #0D0F14;
  --bg-primary: #12151C;
  --bg-secondary: #1A1E28;
  --bg-tertiary: #222836;
  --bg-elevated: #2A3144;

  /* Surfaces */
  --surface-glass: rgba(30, 36, 52, 0.65);
  --surface-glass-border: rgba(255, 255, 255, 0.06);
  --surface-hover: rgba(255, 255, 255, 0.04);

  /* Text */
  --text-primary: #E8ECF4;
  --text-secondary: #9AA3B8;
  --text-tertiary: #6B7590;
  --text-muted: #4A5268;

  /* Accent — Total mode (cool violet-blue) */
  --accent-total-100: #1B1640;
  --accent-total-200: #2D2470;
  --accent-total-300: #4338A0;
  --accent-total-400: #6366F1;
  --accent-total-500: #818CF8;
  --accent-total-600: #A5B4FC;

  /* Race hues */
  --race-black-hue: 280;    /* Violet */
  --race-white-hue: 200;    /* Steel Blue */
  --race-asian-hue: 163;    /* Teal */
  --race-latinx-hue: 35;    /* Amber */

  /* Zero cell */
  --zero-fill: #2A2D38;
  --zero-stroke: #3A3E4C;

  /* Overlay */
  --overlay-active: rgba(99, 102, 241, 0.12);
  --overlay-border: rgba(99, 102, 241, 0.35);

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  /* Transitions */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 400ms;

  /* Font families */
  --font-display: 'Playfair Display', Georgia, serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', monospace;

  /* Dropdown z-index */
  --z-dropdown: 50;
}

/* ═══ Light Theme ═══ */
[data-theme="light"] {
  --bg-deep: #F4F5F7;
  --bg-primary: #FFFFFF;
  --bg-secondary: #F0F1F4;
  --bg-tertiary: #E5E7EC;
  --bg-elevated: #DDE0E7;

  --surface-glass: rgba(255, 255, 255, 0.75);
  --surface-glass-border: rgba(0, 0, 0, 0.08);
  --surface-hover: rgba(0, 0, 0, 0.03);

  --text-primary: #1A1D26;
  --text-secondary: #4A5068;
  --text-tertiary: #7A8198;
  --text-muted: #9DA3B4;

  --accent-total-100: #EEF2FF;
  --accent-total-200: #C7D2FE;
  --accent-total-300: #818CF8;
  --accent-total-400: #6366F1;
  --accent-total-500: #4F46E5;
  --accent-total-600: #4338CA;

  --zero-fill: #E5E7EC;
  --zero-stroke: #D1D5DE;

  --overlay-active: rgba(99, 102, 241, 0.08);
  --overlay-border: rgba(99, 102, 241, 0.25);
}

/* Smooth theme transition */
body {
  transition: background var(--duration-slow) var(--ease-out),
              color var(--duration-slow) var(--ease-out);
}

[data-theme="light"] body::before {
  background:
    radial-gradient(ellipse 80% 60% at 20% 10%, rgba(99, 102, 241, 0.04), transparent),
    radial-gradient(ellipse 60% 50% at 80% 80%, rgba(168, 85, 247, 0.03), transparent);
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background: var(--bg-deep);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Background texture */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 20% 10%, rgba(99, 102, 241, 0.04), transparent),
    radial-gradient(ellipse 60% 50% at 80% 80%, rgba(139, 92, 246, 0.03), transparent);
  pointer-events: none;
  z-index: 0;
}

#app {
  position: relative;
  z-index: 1;
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--space-lg) var(--space-xl);
}

/* ─── Header ─── */
#app-header {
  margin-bottom: var(--space-lg);
}

.header-content {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-lg);
}

.header-title {
  font-family: var(--font-sans);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--text-tertiary);
}

.header-subtitle {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 400;
  color: var(--text-tertiary);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: var(--space-xs);
}

/* ─── Layout Switcher ─── */
.layout-switcher {
  display: flex;
  gap: 2px;
  background: var(--bg-secondary);
  border: 1px solid var(--surface-glass-border);
  border-radius: var(--radius-md);
  padding: 3px;
}

.layout-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-tertiary);
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out);
  white-space: nowrap;
}

.layout-btn:hover {
  color: var(--text-secondary);
  background: var(--surface-hover);
}

.layout-btn.active {
  color: var(--text-primary);
  background: var(--bg-elevated);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
}

.layout-btn svg {
  flex-shrink: 0;
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.motion-dropdown-wrap {
  position: relative;
  min-width: 140px;
}

.header-select-trigger {
  height: 36px;
  background: var(--bg-secondary) !important;
  border-color: var(--surface-glass-border) !important;
  padding: 0 12px !important;
  font-size: 0.75rem !important;
  color: var(--text-tertiary) !important;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
}

.header-select-trigger:hover {
  background: var(--surface-hover) !important;
  color: var(--text-secondary) !important;
}

.header-select-trigger .custom-select-value {
  flex: 1;
  text-align: left;
}

/* ─── Theme Toggle ─── */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--surface-glass-border);
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  color: var(--text-tertiary);
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out);
  position: relative;
  overflow: hidden;
}

.theme-toggle:hover {
  color: var(--accent-total-400);
  border-color: var(--accent-total-400);
  background: var(--surface-hover);
}

.theme-icon {
  position: absolute;
  transition: transform 400ms var(--ease-spring), opacity 300ms var(--ease-out);
}

/* Dark mode: show moon, hide sun */
[data-theme="dark"] .theme-icon-sun { opacity: 0; transform: rotate(-90deg) scale(0.5); }
[data-theme="dark"] .theme-icon-moon { opacity: 1; transform: rotate(0) scale(1); }

/* Light mode: show sun, hide moon */
[data-theme="light"] .theme-icon-sun { opacity: 1; transform: rotate(0) scale(1); }
[data-theme="light"] .theme-icon-moon { opacity: 0; transform: rotate(90deg) scale(0.5); }

.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* ─── Summary Panel ─── */
.summary-panel {
  background: var(--surface-glass);
  border: 1px solid var(--surface-glass-border);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
  overflow: hidden;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.summary-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-md);
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  transition: color var(--duration-fast);
}

.summary-toggle:hover {
  color: var(--text-primary);
}

.summary-toggle-icon {
  transition: transform var(--duration-normal) var(--ease-out);
}

.summary-panel:not(.expanded) .summary-toggle-icon {
  transform: rotate(-90deg);
}

.summary-body {
  max-height: 200px;
  transition: max-height var(--duration-slow) var(--ease-out),
              opacity var(--duration-normal) var(--ease-out),
              padding var(--duration-slow) var(--ease-out);
  opacity: 1;
  padding: 0 var(--space-md) var(--space-md);
}

.summary-panel:not(.expanded) .summary-body {
  max-height: 0;
  opacity: 0;
  padding-bottom: 0;
  overflow: hidden;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--space-md);
}

.summary-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.summary-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 400;
  color: var(--text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.summary-value {
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* ─── Filter Bar ─── */
.filter-bar {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background: var(--surface-glass);
  border: 1px solid var(--surface-glass-border);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-lg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  flex-wrap: wrap;
  position: relative;
  z-index: 10;
}


/* ─── Integrated Penal Code Search ─── */
.code-search-filter {
  flex: 1;
  min-width: 200px;
  position: relative;
  max-width: 320px;
}

.code-search-input-wrap {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 8px 12px;
  background: var(--bg-primary);
  border: 1px solid var(--surface-glass-border);
  border-radius: var(--radius-sm);
  transition: all var(--duration-normal) var(--ease-out);
}

.code-search-filter:focus-within .code-search-input-wrap {
  border-color: var(--accent-total-400);
  background: var(--bg-secondary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.code-search-icon {
  color: var(--text-tertiary);
  flex-shrink: 0;
}

.code-search-input {
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 500;
  width: 100%;
  outline: none;
}

.code-search-input::placeholder {
  color: var(--text-muted);
}

.code-search-results-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  background: var(--bg-secondary);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--surface-glass-border);
  border-radius: var(--radius-md);
  box-shadow: 0 12px 32px -12px rgba(0, 0, 0, 0.7);
  max-height: 300px;
  overflow-y: auto;
  z-index: 100;
  display: grid;
  grid-template-columns: 1fr;
  padding: var(--space-xs);
  gap: 2px;
}

.code-result-card {
  display: flex;
  flex-direction: column;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: transparent;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
}

.code-result-card:hover {
  background: var(--surface-hover);
}

.code-result-id {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--accent-total-400);
  background: rgba(99, 102, 241, 0.1);
  padding: 1px 6px;
  border-radius: 4px;
  display: inline-block;
  width: fit-content;
}

.code-result-name {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 4px;
}

.code-result-cat {
  font-size: 0.7rem;
  color: var(--text-tertiary);
  margin-top: 2px;
}


.filter-group {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.filter-divider {
  width: 1px;
  height: 24px;
  background: var(--surface-glass-border);
  margin: 0 4px;
  flex-shrink: 0;
}

.filter-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
}

.filter-select {
  display: none;
}

/* ─── Custom Select Component ─── */
.custom-select {
  position: relative;
  min-width: 180px;
}

.custom-select-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--surface-glass-border);
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  white-space: nowrap;
}

.custom-select-trigger:hover {
  border-color: var(--accent-total-400);
  background: var(--bg-tertiary);
}

.custom-select.open .custom-select-trigger {
  border-color: var(--accent-total-400);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.12);
}

.custom-select-chevron {
  flex-shrink: 0;
  color: var(--text-muted);
  transition: transform var(--duration-normal) var(--ease-spring);
}

.custom-select.open .custom-select-chevron {
  transform: rotate(180deg);
}

.custom-select-value {
  overflow: hidden;
  text-overflow: ellipsis;
}

.custom-select-value.placeholder {
  color: var(--text-muted);
}

/* Dropdown Panel */
.custom-select-dropdown {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  min-width: 220px;
  z-index: var(--z-dropdown);
  background: var(--bg-primary);
  border: 1px solid var(--surface-glass-border);
  border-radius: var(--radius-md);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25), 0 0 0 1px rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px) scale(0.97);
  transition: opacity var(--duration-normal) var(--ease-out),
              transform var(--duration-normal) var(--ease-spring),
              visibility var(--duration-normal);
}

[data-theme="light"] .custom-select-dropdown {
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1), 0 0 0 1px rgba(0, 0, 0, 0.06);
}

.custom-select.open .custom-select-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

/* Search Input */
.custom-select-search-wrap {
  padding: var(--space-sm);
  border-bottom: 1px solid var(--surface-glass-border);
}

.custom-select-search {
  width: 100%;
  padding: 6px 10px;
  border: 1px solid var(--surface-glass-border);
  border-radius: calc(var(--radius-sm) - 2px);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 400;
  outline: none;
  transition: border-color var(--duration-fast);
}

.custom-select-search::placeholder {
  color: var(--text-muted);
}

.custom-select-search:focus {
  border-color: var(--accent-total-400);
}

/* Options List */
.custom-select-options {
  list-style: none;
  margin: 0;
  padding: var(--space-xs) 0;
  max-height: 220px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--bg-elevated) transparent;
}

.custom-select-options::-webkit-scrollbar {
  width: 5px;
}

.custom-select-options::-webkit-scrollbar-thumb {
  background: var(--bg-elevated);
  border-radius: 3px;
}

.custom-select-option {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 8px 14px;
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--duration-fast);
  position: relative;
}

.custom-select-option:hover {
  background: var(--surface-hover);
  color: var(--text-primary);
}

.custom-select-option.selected {
  color: var(--accent-total-400);
  font-weight: 600;
  background: rgba(99, 102, 241, 0.06);
}

.custom-select-option.selected::before {
  content: '';
  position: absolute;
  left: 4px;
  width: 3px;
  top: 6px;
  bottom: 6px;
  border-radius: 2px;
  background: var(--accent-total-400);
}

.custom-select-option.hidden {
  display: none;
}

.custom-select-empty {
  padding: 12px 14px;
  font-family: var(--font-body);
  font-size: 0.78rem;
  color: var(--text-muted);
  text-align: center;
  font-style: italic;
}

.filter-divider {
  width: 1px;
  height: 24px;
  background: var(--surface-glass-border);
  margin: 0 var(--space-sm);
}

/* ─── Mode Toggle ─── */
.mode-toggle {
  position: relative;
  display: flex;
  background: var(--bg-secondary);
  border: 1px solid var(--surface-glass-border);
  border-radius: var(--radius-sm);
  padding: 3px;
  margin-left: auto;
}

.mode-btn {
  position: relative;
  z-index: 2;
  padding: 6px 18px;
  border: none;
  border-radius: calc(var(--radius-sm) - 2px);
  background: transparent;
  color: var(--text-tertiary);
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: color var(--duration-fast);
  white-space: nowrap;
}

.mode-btn:hover {
  color: var(--text-secondary);
}

.mode-btn.active {
  color: var(--text-primary);
}

.mode-slider {
  position: absolute;
  z-index: 1;
  top: 3px;
  left: 3px;
  height: calc(100% - 6px);
  width: calc(50% - 3px);
  background: var(--accent-total-400);
  border-radius: calc(var(--radius-sm) - 2px);
  opacity: 0.15;
  transition: transform var(--duration-normal) var(--ease-spring);
}

.mode-toggle[data-active="by-race"] .mode-slider {
  transform: translateX(100%);
}

/* ─── Empty State ─── */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  padding: var(--space-2xl) var(--space-lg);
  color: var(--text-muted);
  text-align: center;
  min-height: 320px;
}

.empty-state-icon {
  color: var(--text-muted);
  opacity: 0.5;
  animation: pulse-subtle 3s ease-in-out infinite;
}

@keyframes pulse-subtle {
  0%, 100% { opacity: 0.5; transform: scale(1); }
  50% { opacity: 0.7; transform: scale(1.03); }
}

.empty-state-text {
  font-size: 0.92rem;
  font-weight: 400;
  color: var(--text-tertiary);
  line-height: 1.5;
}

.empty-state-text strong {
  color: var(--text-secondary);
  font-weight: 600;
}

/* ─── Viz Container ─── */
.viz-container {
  display: flex;
  gap: 0;
  position: relative;
  background: var(--surface-glass);
  border: 1px solid var(--surface-glass-border);
  border-radius: var(--radius-lg);
  overflow: visible;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.viz-scroll-wrapper {
  flex: 1;
  overflow-x: auto;
  overflow-y: visible;
  position: relative;
  scrollbar-width: thin;
  scrollbar-color: var(--bg-elevated) transparent;
}

.viz-scroll-wrapper::-webkit-scrollbar {
  height: 6px;
}

.viz-scroll-wrapper::-webkit-scrollbar-track {
  background: transparent;
}

.viz-scroll-wrapper::-webkit-scrollbar-thumb {
  background: var(--bg-elevated);
  border-radius: 3px;
}

.viz-inner {
  min-width: fit-content;
}

#heatmap-svg {
  display: block;
}

/* ─── Summary Column (Design B) ─── */
.summary-column {
  width: 180px;
  flex-shrink: 0;
  border-left: 1px solid var(--surface-glass-border);
  padding: 0;
  background: rgba(20, 24, 35, 0.5);
}

.summary-column-header {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--surface-glass-border);
  text-align: center;
}

.summary-column-row {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.summary-column-count {
  font-family: var(--font-body);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.summary-column-delta {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 400;
  margin-top: 2px;
}

.summary-column-delta.negative {
  color: hsl(0, 60%, 60%);
}

.summary-column-delta.positive {
  color: hsl(140, 50%, 55%);
}

.summary-column-delta.neutral {
  color: var(--text-muted);
}

/* ─── Legend Panel ─── */
.legend-panel {
  margin-top: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  background: var(--surface-glass);
  border: 1px solid var(--surface-glass-border);
  border-radius: var(--radius-md);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.legend-content {
  display: flex;
  align-items: flex-start;
  gap: var(--space-xl);
  flex-wrap: wrap;
}

.legend-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.legend-title {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.legend-gradient-bar {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.legend-gradient {
  width: 160px;
  height: 14px;
  border-radius: 3px;
  border: 1px solid var(--surface-glass-border);
}

.legend-gradient-labels {
  display: flex;
  justify-content: space-between;
  width: 160px;
}

.legend-gradient-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--text-muted);
}

.legend-zero {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.legend-zero-swatch {
  width: 18px;
  height: 14px;
  border-radius: 3px;
  overflow: hidden;
  border: 1px solid var(--surface-glass-border);
}

.legend-zero-label {
  font-family: var(--font-body);
  font-size: 0.72rem;
  color: var(--text-tertiary);
}

.legend-race-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.legend-race-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.legend-race-swatch {
  width: 18px;
  height: 14px;
  border-radius: 3px;
  border: 1px solid var(--surface-glass-border);
}

.legend-race-label {
  font-family: var(--font-body);
  font-size: 0.72rem;
  color: var(--text-secondary);
}

/* ─── Tooltip ─── */
.tooltip {
  position: fixed;
  z-index: 100;
  pointer-events: none;
  background: var(--bg-primary);
  border: 1px solid var(--surface-glass-border);
  border-radius: var(--radius-sm);
  padding: var(--space-sm) var(--space-md);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(255, 255, 255, 0.04);
  opacity: 0;
  transform: translateY(4px);
  transition: opacity var(--duration-fast), transform var(--duration-fast);
  min-width: 160px;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.tooltip.visible {
  opacity: 1;
  transform: translateY(0);
}

.tooltip-header {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--surface-glass-border);
  white-space: nowrap;
}

.tooltip-body {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.tooltip-row {
  display: flex;
  justify-content: space-between;
  gap: var(--space-md);
}

.tooltip-race-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  margin-right: 4px;
  vertical-align: middle;
}

.tooltip-count {
  font-weight: 600;
  color: var(--text-primary);
}

/* ─── SVG Styles ─── */
.cell-rect {
  transition: opacity var(--duration-normal) var(--ease-out),
              fill var(--duration-slow) var(--ease-out);
  cursor: default;
}

.cell-rect:hover {
  opacity: 0.85;
  stroke: var(--text-secondary);
  stroke-width: 1;
}

.axis-label {
  font-family: var(--font-body);
  fill: var(--text-tertiary);
  font-size: 0.7rem;
}

.axis-label-y {
  font-family: var(--font-body);
  fill: var(--text-secondary);
  font-size: 0.78rem;
  font-weight: 500;
}

.axis-line {
  stroke: var(--surface-glass-border);
  stroke-width: 1;
}

.overlay-band {
  fill: var(--overlay-active);
  stroke: var(--overlay-border);
  stroke-width: 1;
  stroke-dasharray: 4 3;
}

/* ─── Small Multiples (Design C) ─── */
.strip-container {
  margin-bottom: var(--space-sm);
}

.strip-label {
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
  padding: var(--space-xs) var(--space-md);
}

/* ═══════════════════════════════════════════════════
   Animation System
   ═══════════════════════════════════════════════════ */

/* ─── Viz Crossfade ─── */
.viz-container {
  transition: opacity 280ms var(--ease-out), transform 320ms var(--ease-out), filter 320ms var(--ease-out);
}

/* Default / Standard */
.viz-container.transitioning-out {
  opacity: 0;
  transform: translateY(2px);
}

.viz-container.transitioning-in {
  opacity: 1;
  transform: translateY(0);
}

/* Zoom Flow */
.viz-container.motion-zoom.transitioning-out {
  opacity: 0;
  filter: brightness(1.1);
}
.viz-container.motion-zoom.transitioning-in {
  opacity: 1;
  filter: brightness(1);
}

/* Side Slide */
.viz-container.motion-slide.transitioning-out {
  opacity: 0;
  transform: translateX(-4px);
}
.viz-container.motion-slide.transitioning-in {
  opacity: 1;
  transform: translateX(0);
}

/* Blur Bloom */
.viz-container.motion-blur.transitioning-out {
  opacity: 0;
  filter: blur(4px);
}
.viz-container.motion-blur.transitioning-in {
  opacity: 1;
  filter: blur(0);
}

/* Soft Reveal */
.viz-container.motion-soft.transitioning-out {
  opacity: 0;
  transform: translateY(12px);
}
.viz-container.motion-soft.transitioning-in {
  opacity: 1;
  transform: translateY(0);
  transition-duration: 450ms;
}

/* Pulse Entry */
.viz-container.motion-pulse.transitioning-out {
  opacity: 0;
  transform: scale(0.95);
}
.viz-container.motion-pulse.transitioning-in {
  animation: pulseIn 450ms var(--ease-out) forwards;
}

@keyframes pulseIn {
  0% { opacity: 0; transform: scale(0.95); }
  50% { opacity: 1; transform: scale(1.02); }
  100% { opacity: 1; transform: scale(1); }
}

/* 10 New Styles container-level effects */
.viz-container.motion-ghost.transitioning-out { opacity: 0; filter: blur(12px) grayscale(100%); }
.viz-container.motion-ghost.transitioning-in { opacity: 1; filter: blur(0) grayscale(0); }

.viz-container.motion-stomp.transitioning-out { opacity: 0; transform: scale(1.1); }
.viz-container.motion-stomp.transitioning-in { opacity: 1; transform: scale(1); }

.viz-container.motion-drop.transitioning-out { opacity: 0; transform: translateY(-30px); }
.viz-container.motion-drop.transitioning-in { opacity: 1; transform: translateY(0); }

.viz-container.motion-cinematic.transitioning-out { opacity: 0; filter: brightness(0.5) contrast(1.5); }
.viz-container.motion-cinematic.transitioning-in { opacity: 1; filter: brightness(1) contrast(1); transition-duration: 1200ms;}

.viz-container.motion-vortex.transitioning-out { opacity: 0; transform: scale(0.8) rotate(-5deg); }
.viz-container.motion-vortex.transitioning-in { opacity: 1; transform: scale(1) rotate(0deg); }

.viz-container.motion-neon.transitioning-out { opacity: 0; filter: drop-shadow(0 0 0px var(--accent-total-400)); }
.viz-container.motion-neon.transitioning-in { opacity: 1; animation: neonPulse 1s var(--ease-out) forwards; }
@keyframes neonPulse { 
  0% { filter: drop-shadow(0 0 20px var(--accent-total-500)); } 
  100% { filter: drop-shadow(0 0 0px transparent); } 
}

.viz-container.motion-wave.transitioning-out { opacity: 0; transform: translateY(20px); }
.viz-container.motion-wave.transitioning-in { opacity: 1; transform: translateY(0); }

.viz-container.motion-helix.transitioning-out { opacity: 0; filter: hue-rotate(90deg); }
.viz-container.motion-helix.transitioning-in { opacity: 1; filter: hue-rotate(0deg); }

.viz-container.motion-blueprint.transitioning-out { opacity: 0; filter: invert(0.1) sepia(1) hue-rotate(180deg) saturate(3); }
.viz-container.motion-blueprint.transitioning-in { opacity: 1; filter: invert(0) sepia(0) hue-rotate(0deg) saturate(1); }

.viz-container.motion-glitch.transitioning-out { opacity: 0; }
.viz-container.motion-glitch.transitioning-in { animation: glitchIn 400ms steps(3) forwards; }
@keyframes glitchIn {
  0% { opacity: 0.2; transform: translate(10px, -5px) skew(-5deg); filter: hue-rotate(-90deg); }
  33% { opacity: 0.8; transform: translate(-10px, 5px) skew(5deg); filter: hue-rotate(90deg); }
  66% { opacity: 0.4; transform: translate(5px, 0) skew(0); filter: invert(0.5); }
  100% { opacity: 1; transform: translate(0, 0) skew(0); filter: none; }
}


/* ─── Legend Crossfade ─── */
.legend-panel {
  transition: opacity 320ms var(--ease-out);
}

.legend-panel.transitioning-out {
  opacity: 0;
}

/* ─── Summary Value Animation ─── */
.summary-value {
  transition: color 300ms var(--ease-out);
}

.summary-value.counting {
  color: var(--accent-total-500);
}

/* ─── Summary Column Row Slide ─── */
.summary-column-row {
  transition: opacity 400ms var(--ease-out), transform 400ms var(--ease-out);
}

.summary-column-row.slide-in {
  animation: slideInRight 400ms var(--ease-out) both;
}

@keyframes slideInRight {
  from { opacity: 0; transform: translateX(20px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* ─── Filter Flash ─── */
.filter-select.changed,
.custom-select-trigger.changed {
  animation: filterFlash 600ms var(--ease-out);
}

@keyframes filterFlash {
  0%   { box-shadow: 0 0 0 0 rgba(99, 102, 241, 0.4); }
  40%  { box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.15); }
  100% { box-shadow: 0 0 0 0 rgba(99, 102, 241, 0); }
}

/* ─── Mode Toggle Glow ─── */
.mode-btn.active {
  color: var(--text-primary);
  animation: modeGlow 500ms var(--ease-out);
}

@keyframes modeGlow {
  0%   { text-shadow: 0 0 0 transparent; }
  50%  { text-shadow: 0 0 12px rgba(165, 180, 252, 0.4); }
  100% { text-shadow: 0 0 0 transparent; }
}

/* ─── Layout Button Active Pulse ─── */
.layout-btn.active {
  animation: layoutPulse 400ms var(--ease-out);
}

@keyframes layoutPulse {
  0%   { box-shadow: 0 1px 4px rgba(0,0,0,0.3); }
  50%  { box-shadow: 0 1px 12px rgba(99,102,241,0.25), 0 1px 4px rgba(0,0,0,0.3); }
  100% { box-shadow: 0 1px 4px rgba(0,0,0,0.3); }
}

/* ─── Fade-In Base ─── */
@keyframes fade-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-in {
  animation: fade-in var(--duration-slow) var(--ease-out) both;
}

/* ─── Responsive ─── */
@media (max-width: 768px) {
  #app {
    padding: var(--space-md) var(--space-md);
  }

  .header-content {
    flex-direction: column;
    align-items: flex-start;
  }

  .header-title {
    font-size: 1.5rem;
  }

  .filter-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .filter-divider {
    width: 100%;
    height: 1px;
    margin: var(--space-xs) 0;
  }

  .mode-toggle {
    margin-left: 0;
    align-self: flex-start;
  }

  .summary-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .layout-btn span {
    display: none;
  }

  .legend-content {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .summary-grid {
    grid-template-columns: 1fr;
  }
}