/* ================================
   CSS Custom Properties
   ================================ */
:root {
  /* Colors */
  --color-primary: #e94560;
  --color-secondary: #ff7b54;
  --color-primary-dark: #c73e54;
  
  --color-bg-dark: #1a1a2e;
  --color-bg-mid: #16213e;
  --color-bg-light: #0f3460;
  --color-sidebar-bg: rgba(15, 15, 30, 0.92);
  --color-tooltip-bg: rgba(15, 15, 25, 0.95);
  
  --color-text: #fff;
  --color-text-muted: rgba(255, 255, 255, 0.5);
  --color-text-subtle: rgba(255, 255, 255, 0.4);
  --color-text-light: rgba(255, 255, 255, 0.7);
  
  --color-border: rgba(255, 255, 255, 0.1);
  --color-input-bg: rgba(255, 255, 255, 0.08);
  --color-input-border: rgba(255, 255, 255, 0.15);
  --color-item-bg: rgba(255, 255, 255, 0.05);
  
  /* Spacing */
  --space-xs: 4px;
  --space-sm: 6px;
  --space-md: 8px;
  --space-lg: 12px;
  --space-xl: 16px;
  --space-2xl: 20px;
  --space-3xl: 24px;
  
  /* Sizing */
  --sidebar-width: 320px;
  --zoom-btn-size: 44px;
  --zoom-btn-size-mobile: 48px;
  
  /* Effects */
  --blur-sidebar: 20px;
  --blur-tooltip: 10px;
  --shadow-card: 0 10px 40px rgba(0, 0, 0, 0.4);
  --shadow-zoom: 0 4px 16px rgba(0, 0, 0, 0.3);
  --shadow-button: 0 4px 12px rgba(233, 69, 96, 0.35);
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.2s ease;
}

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

html,
body {
  height: 100%;
  width: 100%;
}

body {
  font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: linear-gradient(135deg, var(--color-bg-dark) 0%, var(--color-bg-mid) 50%, var(--color-bg-light) 100%);
  color: var(--color-text);
  overflow: hidden;
}

/* ================================
   Layout Components
   ================================ */
.main-content {
  display: grid;
  grid-template-columns: 1fr var(--sidebar-width);
  height: 100vh;
  width: 100vw;
  overflow: hidden;
}

/* ================================
   Product Header
   ================================ */
.product-name {
  position: fixed;
  top: var(--space-3xl);
  left: var(--space-3xl);
  z-index: 50;
}

.product-title {
  font-size: 20px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ================================
   Map Container
   ================================ */
.map-container {
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
  touch-action: manipulation;
}

.map-container svg {
  display: block;
  width: 100%;
  height: 100%;
  filter: drop-shadow(0 10px 40px rgba(0, 0, 0, 0.3 District));
}

/* Map States */
.map-container svg #features > g {
  transition: fill var(--transition-normal), opacity var(--transition-normal);
}

.map-container svg #features > g.selected {
  fill: var(--color-primary) !important;
}

.map-container svg #features > g.highlighted {
  fill: var(--color-secondary) !important;
}

.map-container svg #features > g.dimmed {
  opacity: 0.25;
}

.map-container svg #features > g:hover {
  fill: var(--color-secondary) !important;
  opacity: 0.85;
}

/* ================================
   Sidebar
   ================================ */
.sidebar {
  position: fixed;
  top: 0;
  right: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--color-sidebar-bg);
  backdrop-filter: blur(var(--blur-sidebar));
  border-left: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  z-index: 40;
}

/* Sidebar Header */
.sidebar-header {
  padding: var(--space-2xl);
  border-bottom: 1px solid var(--color-border);
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  flex-shrink: 0;
}

/* Sidebar Filter Section */
.sidebar-filter {
  padding: var(--space-xl) var(--space-2xl);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.sidebar-filter__title {
  font-size: 11px;
  font-weight: 600;
  color: var(--color-text-subtle);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--space-lg);
}

.sidebar-filter__controls {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.sidebar-filter__row {
  display: flex;
  gap: var(--space-sm);
}

/* Form Elements */
.sidebar-filter select,
.sidebar-filter input {
  flex: 1;
  padding: 10px var(--space-lg);
  border-radius: 8px;
  border: 1px solid var(--color-input-border);
  background: var(--color-input-bg);
  color: var(--color-text);
  font-size: 13px;
  font-family: inherit;
}

.sidebar-filter input {
  min-width: 0;
}

.sidebar-filter button {
  width: 100%;
  padding: 10px var(--space-xl);
  border-radius: 8px;
  border: none;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: var(--color-text);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-normal);
  font-family: inherit;
}

.sidebar-filter button:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-button);
}

/* ================================
   District List
   ================================ */
.district-list {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-lg);
  padding-bottom: 0;
}

.district-list::-webkit-scrollbar {
  width: 4px;
}

.district-list::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.05);
}

.district-list::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.2);
  border-radius: 4px;
}

/* Province Header */
.il-header {
  font-size: 10px;
  font-weight: 600;
  color: var(--color-text-subtle);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin: var(--space-lg) 0 var(--space-sm);
  padding-left: var(--space-xs);
}

.il-header:first-child {
  margin-top: 0;
}

/* District Item */
.district-item {
  display: flex;
  align-items: center;
  padding: var(--space-md) var(--space-lg);
  background: var(--color-item-bg);
  border-radius: 8px;
  margin-bottom: var(--space-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
  gap: var(--space-md);
}

.district-item:hover {
  background: rgba(233, 69, 96, 0.15);
  border-color: rgba(233, 69, 96, 0.3);
}

.district-item__name {
  flex: 1;
  font-size: 13px;
  font-weight: 500;
}

.district-item__pop {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-light);
}

.district-item__remove {
  width: 24px;
  height: 24px;
  border: none;
  background: var(--color-item-bg);
  border-radius: 50%;
  color: var(--color-text-muted);
  font-size: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.district-item__remove:hover {
  background: rgba(233, 69, 96, 0.8);
  color: var(--color-text);
}

/* Empty State */
.empty-message {
  color: rgba(255, 255, 255, 0.35);
  font-size: 14px;
  text-align: center;
  padding: 40px var(--space-xl);
  line-height: 1.6;
}

/* ================================
   Sidebar Stats
   ================================ */
.sidebar-stats {
  display: flex;
  justify-content: space-around;
  padding: var(--space-xl) var(--space-2xl);
  background: rgba(233, 69, 96, 0.1);
  border-top: 1px solid var(--color-border);
  flex-shrink: 0;
}

.sidebar-stats__item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.sidebar-stats__value {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
}

.sidebar-stats__label {
  font-size: 9px;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-top: 2px;
}

/* ================================
   Reset Button
   ================================ */
.reset-btn {
  margin: var(--space-lg) var(--space-xl);
  padding: var(--space-lg) var(--space-2xl);
  border-radius: 10px;
  border: 1px solid rgba(233, 69, 96, 0.4);
  background: rgba(233, 69, 96, 0.15);
  color: var(--color-primary);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-normal);
  font-family: inherit;
  width: calc(100% - var(--space-2xl));
}

.reset-btn:hover {
  background: rgba(233, 69, 96, 0.25);
  border-color: rgba(233, 69, 96, 0.6);
}

.reset-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.reset-btn:disabled:hover {
  background: rgba(233, 69, 96, 0.15);
  border-color: rgba(233, 69, 96, 0.4);
}

/* ================================
   Zoom Controls
   ================================ */
.zoom-controls {
  position: fixed;
  bottom: var(--space-3xl);
  right: calc(var(--sidebar-width) + var(--space-3xl));
  display: flex;
  flex-direction: column;
  gap: 2px;
  z-index: 50;
}

.zoom-btn {
  width: var(--zoom-btn-size);
  height: var(--zoom-btn-size);
  border-radius: 12px;
  border: none;
  background: var(--color-sidebar-bg);
  backdrop-filter: blur(var(--blur-sidebar));
  color: var(--color-text);
  font-size: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-zoom);
  transition: all var(--transition-fast);
}

.zoom-btn:hover {
  background: rgba(30, 30, 50, 0.95);
  transform: scale(1.05);
}

.zoom-btn:active {
  transform: scale(0.95);
}

.zoom-btn--divider {
  height: 1px;
  background: var(--color-input-border);
  cursor: default;
}

.zoom-btn--divider:hover {
  transform: none;
  background: var(--color-input-border);
}

/* ================================
   Tooltip
   ================================ */
.tooltip {
  position: fixed;
  background: var(--color-tooltip-bg);
  backdrop-filter: blur(var(--blur-tooltip));
  border: 1px solid var(--color-input-border);
  border-radius: 12px;
  padding: 14px 18px;
  pointer-events: none;
  z-index: 1000;
  box-shadow: var(--shadow-card);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.tooltip--visible {
  opacity: 1;
}

.tooltip__province {
  font-size: 11px;
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 6px;
}

.tooltip__district {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 6px;
}

.tooltip__population {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-light);
}

/* ================================
   Loading State
   ================================ */
#loading {
  color: var(--color-text-muted);
  font-size: 14px;
}

/* ================================
   Responsive: Tablet
   ================================ */
@media (max-width: 1024px) {
  .main-content {
    grid-template-columns: 1fr;
  }
  
  .sidebar {
    display: none;
  }
  
  .zoom-controls {
    right: var(--space-xl);
    bottom: 100px;
  }
  
  .product-title {
    font-size: 18px;
  }
}

/* ================================
   Responsive: Mobile
   ================================ */
@media (max-width: 768px) {
  .zoom-controls {
    bottom: var(--space-xl);
    right: var(--space-xl);
  }
  
  .zoom-btn {
    width: var(--zoom-btn-size-mobile);
    height: var(--zoom-btn-size-mobile);
    font-size: 22px;
    border-radius: 14px;
  }
  
  .product-name {
    top: var(--space-lg);
    left: var(--space-lg);
  }
}