/* --- RESET & BASE CONFIG --- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

:root {
  /* Color Palette - Dark Mode (Default) */
  --bg-app: #090d16;
  --bg-sidebar: #0f1626;
  --bg-card: #151e33;
  --border-color: #222f4c;
  
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --primary: #6366f1; /* Indigo */
  --primary-hover: #4f46e5;
  --primary-light: rgba(99, 102, 241, 0.15);
  
  --secondary: #10b981; /* Emerald */
  --secondary-light: rgba(16, 185, 129, 0.15);
  
  --accent: #8b5cf6; /* Violet */
  --accent-light: rgba(139, 92, 246, 0.15);
  
  --danger: #ef4444; /* Red */
  --danger-light: rgba(239, 68, 68, 0.15);
  
  --warning: #f59e0b; /* Amber */
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.15);
  
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  
  --sidebar-width: 260px;
}

body.light-theme {
  /* Color Palette - Light Mode */
  --bg-app: #f8fafc;
  --bg-sidebar: #ffffff;
  --bg-card: #ffffff;
  --border-color: #e2e8f0;
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-light: rgba(79, 70, 229, 0.1);
  
  --secondary: #059669;
  --secondary-light: rgba(5, 150, 105, 0.1);
  
  --accent: #7c3aed;
  --accent-light: rgba(124, 58, 237, 0.1);
  
  --danger: #dc2626;
  --danger-light: rgba(220, 38, 38, 0.1);
  
  --shadow-glow: 0 4px 20px rgba(79, 70, 229, 0.08);
}

body {
  background-color: var(--bg-app);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* --- APP CONTAINER LAYOUT --- */
.app-container {
  display: flex;
  width: 100%;
  min-height: 100vh;
}

/* --- SIDEBAR --- */
.sidebar {
  width: var(--sidebar-width);
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  padding: 1.5rem 1.25rem;
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 100;
  transition: transform var(--transition-normal), background-color var(--transition-normal), border-color var(--transition-normal);
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--primary);
}

.logo-icon {
  width: 1.5rem;
  height: 1.5rem;
  stroke-width: 2.5;
}

.close-sidebar-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.25rem;
}

.sidebar-nav {
  flex: 1;
}

.sidebar-nav ul {
  list-style: none;
}

.sidebar-nav li {
  margin-bottom: 0.5rem;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: 0.5rem;
  font-weight: 500;
  font-size: 0.95rem;
  transition: all var(--transition-fast);
}

.nav-link:hover {
  background-color: var(--primary-light);
  color: var(--primary);
}

.nav-link.active {
  background-color: var(--primary);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.35);
}

.nav-link i {
  width: 1.25rem;
  height: 1.25rem;
  stroke-width: 2;
}

.sidebar-footer {
  border-top: 1px solid var(--border-color);
  padding-top: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.theme-toggle-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem;
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  background-color: rgba(255, 255, 255, 0.02);
  color: var(--text-secondary);
  cursor: pointer;
  font-weight: 500;
  font-size: 0.875rem;
  width: 100%;
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  background-color: var(--primary-light);
  color: var(--primary);
  border-color: var(--primary);
}

.sun-icon {
  display: none;
}

body.light-theme .sun-icon {
  display: block;
}
body.light-theme .moon-icon {
  display: none;
}

.credits {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: center;
}

.credits p {
  margin-bottom: 0.25rem;
}

.version {
  background-color: var(--border-color);
  padding: 0.15rem 0.4rem;
  border-radius: 0.25rem;
}

/* --- MOBILE HEADER --- */
.mobile-header {
  display: none;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  background-color: var(--bg-sidebar);
  border-bottom: 1px solid var(--border-color);
  padding: 0 1rem;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 99;
}

.menu-toggle-btn {
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: 0.25rem;
}

.mobile-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--primary);
}

/* --- MAIN CONTENT --- */
.main-content {
  flex: 1;
  padding: 2rem;
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  transition: margin-left var(--transition-normal);
}

.content-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
}

h1 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
}

.subtitle {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 0.25rem;
}

.data-period {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--bg-card);
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  border: 1px solid var(--border-color);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.data-period i {
  width: 1rem;
  height: 1rem;
  color: var(--primary);
}

/* --- LOADING OVERLAY --- */
.loading-overlay {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: fixed;
  top: 0;
  left: var(--sidebar-width);
  right: 0;
  bottom: 0;
  background-color: rgba(9, 13, 22, 0.85);
  z-index: 98;
  backdrop-filter: blur(8px);
  gap: 1rem;
  transition: all var(--transition-fast);
}

body.light-theme .loading-overlay {
  background-color: rgba(248, 250, 252, 0.85);
}

.spinner {
  width: 2.5rem;
  height: 2.5rem;
  border: 3px solid var(--border-color);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* --- DASHBOARD SECTIONS --- */
.dashboard-section {
  display: none;
  flex-direction: column;
  gap: 1.5rem;
  animation: fadeIn 0.4s ease-out forwards;
}

.dashboard-section.active {
  display: flex;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --- KPI CARDS --- */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
}

.kpi-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  padding: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.kpi-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  border-color: var(--primary);
}

.kpi-icon-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 0.75rem;
  font-size: 1.5rem;
}

.broadband-card .kpi-icon-wrapper {
  background-color: var(--primary-light);
  color: var(--primary);
}

.mobile-card .kpi-icon-wrapper {
  background-color: var(--secondary-light);
  color: var(--secondary);
}

.tv-card .kpi-icon-wrapper {
  background-color: var(--danger-light);
  color: var(--danger);
}

.total-card .kpi-icon-wrapper {
  background-color: var(--accent-light);
  color: var(--accent);
}

.kpi-info {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  flex: 1;
}

.kpi-title {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.kpi-value {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.kpi-trend {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 0.25rem;
}

.trend-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.2rem;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.15rem 0.4rem;
  border-radius: 0.25rem;
}

.trend-badge.positive {
  background-color: var(--secondary-light);
  color: var(--secondary);
}

.trend-badge.negative {
  background-color: var(--danger-light);
  color: var(--danger);
}

.trend-badge i {
  width: 0.85rem;
  height: 0.85rem;
  stroke-width: 2.5;
}

.trend-label {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* --- CHART CARDS --- */
.charts-grid-main {
  width: 100%;
}

.charts-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 1.25rem;
}

.chart-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: border-color var(--transition-fast);
}

.chart-card:hover {
  border-color: var(--border-color);
}

.large-chart {
  grid-column: 1 / -1;
}

.chart-header {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.chart-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
}

.chart-subtitle {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.chart-container {
  position: relative;
  width: 100%;
  min-height: 320px;
}

/* Custom chart colors used in ApexCharts config */
.broadband-color { background-color: var(--primary); }
.mobile-color { background-color: var(--secondary); }
.tv-color { background-color: var(--danger); }

/* --- SUMMARY AND HIGHLIGHTS --- */
.summary-highlight-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.25rem;
}

.highlight-card, .density-summary-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.highlight-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
}

.highlight-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.highlight-list li {
  display: flex;
  gap: 1rem;
  font-size: 0.85rem;
  line-height: 1.4;
  color: var(--text-secondary);
}

.highlight-list li strong {
  color: var(--text-primary);
  display: block;
  margin-bottom: 0.15rem;
}

.icon-indicator {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.icon-indicator.success {
  background-color: var(--secondary-light);
  color: var(--secondary);
}

.icon-indicator.info {
  background-color: var(--primary-light);
  color: var(--primary);
}

.icon-indicator.danger {
  background-color: var(--danger-light);
  color: var(--danger);
}

.icon-indicator i {
  width: 1rem;
  height: 1rem;
}

/* Density items */
.density-bar-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.density-item {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.density-info {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
}

.density-info span {
  color: var(--text-secondary);
}

.density-info strong {
  color: var(--text-primary);
}

.progress-track {
  height: 8px;
  background-color: var(--border-color);
  border-radius: 4px;
  overflow: hidden;
  width: 100%;
}

.progress-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 1s ease-out;
}

/* --- STATE ANALYSIS CONTROLS --- */
.controls-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  padding: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.search-box {
  position: relative;
  flex: 1;
  min-width: 280px;
}

.search-icon {
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  width: 1.1rem;
  height: 1.1rem;
}

#stateSearchInput {
  width: 100%;
  padding: 0.625rem 1rem 0.625rem 2.25rem;
  background-color: var(--bg-app);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  color: var(--text-primary);
  font-size: 0.875rem;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

#stateSearchInput::placeholder {
  color: var(--text-muted);
}

#stateSearchInput:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px var(--primary-light);
}

.filter-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.filter-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.filter-btn {
  border: 1px solid var(--border-color);
  background-color: var(--bg-app);
  color: var(--text-secondary);
  padding: 0.5rem 0.75rem;
  border-radius: 0.5rem;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  background-color: var(--primary-light);
  color: var(--primary);
  border-color: var(--primary);
}

.filter-btn.active {
  background-color: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}

.styled-select {
  padding: 0.5rem 2.25rem 0.5rem 1rem;
  background-color: var(--bg-app);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  color: var(--text-primary);
  font-size: 0.875rem;
  font-weight: 500;
  outline: none;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2394a3b8' stroke-width='2.5'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' d='M19.5 8.25l-7.5 7.5-7.5-7.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  background-size: 1rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

body.light-theme .styled-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%23475569' stroke-width='2.5'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' d='M19.5 8.25l-7.5 7.5-7.5-7.5'/%3E%3C/svg%3E");
}

.styled-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px var(--primary-light);
}

.styled-select.header-select {
  padding: 0.35rem 1.75rem 0.35rem 0.5rem;
  font-size: 0.825rem;
  background-color: var(--bg-app);
  border-radius: 0.35rem;
  border-color: var(--border-color);
  background-position: right 0.5rem center;
}

.range-select-label {
  margin-left: 0.5rem;
  margin-right: 0.25rem;
  font-weight: 500;
  font-size: 0.825rem;
  color: var(--text-secondary);
}

.range-select-separator {
  margin: 0 0.25rem;
  font-size: 0.825rem;
  color: var(--text-muted);
}

.page-indicator {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
}

/* --- STATE RANKING TABLE --- */
.table-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.table-responsive {
  overflow-x: auto;
  width: 100%;
}

.states-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.states-table th, .states-table td {
  padding: 0.875rem 1rem;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.875rem;
  white-space: nowrap;
}

.states-table th {
  color: var(--text-secondary);
  font-weight: 600;
  background-color: rgba(255, 255, 255, 0.01);
  user-select: none;
}

body.light-theme .states-table th {
  background-color: rgba(0, 0, 0, 0.01);
}

.states-table th.sortable {
  cursor: pointer;
  transition: color var(--transition-fast);
}

.states-table th.sortable:hover {
  color: var(--primary);
}

.states-table th.sortable i {
  display: inline-block;
  width: 0.85rem;
  height: 0.85rem;
  margin-left: 0.25rem;
  vertical-align: middle;
}

.states-table tbody tr {
  transition: background-color var(--transition-fast);
}

.states-table tbody tr:hover {
  background-color: rgba(255, 255, 255, 0.02);
}

body.light-theme .states-table tbody tr:hover {
  background-color: rgba(0, 0, 0, 0.015);
}

.states-table td.numeric, .states-table th.numeric {
  text-align: right;
}

.uf-badge {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  border-radius: 0.25rem;
  font-weight: 700;
  font-size: 0.75rem;
  text-align: center;
  background-color: var(--primary-light);
  color: var(--primary);
}

.states-table tr:last-child td {
  border-bottom: none;
}

/* Highlight regions if needed */
.states-table td strong {
  color: var(--text-primary);
}

/* --- RESPONSIVE MEDIA QUERIES --- */
@media (max-width: 1024px) {
  .sidebar {
    transform: translateX(-100%);
  }
  
  .sidebar.open {
    transform: translateX(0);
  }
  
  .close-sidebar-btn {
    display: block;
  }
  
  .mobile-header {
    display: flex;
  }
  
  .main-content {
    margin-left: 0;
    padding-top: 5rem; /* Space for mobile header */
  }
  
  .loading-overlay {
    left: 0;
  }
}

@media (max-width: 768px) {
  .charts-row {
    grid-template-columns: 1fr;
  }
  
  .content-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }
  
  .data-period {
    align-self: flex-start;
  }
  
  .controls-card {
    flex-direction: column;
    align-items: stretch;
  }
  
  .filter-group {
    flex-wrap: wrap;
    justify-content: flex-start;
  }
}

@media (max-width: 480px) {
  .main-content {
    padding: 1rem;
    padding-top: 5rem;
  }
  
  .kpi-grid {
    grid-template-columns: 1fr;
  }
  
  .states-table th, .states-table td {
    padding: 0.75rem 0.5rem;
    font-size: 0.8rem;
  }
  
  h1 {
    font-size: 1.5rem;
  }
}