:root {
  --primary-color: #E40000;
  --primary-hover: #c70000;
  --primary-light: rgba(228, 0, 0, 0.1);
  --sidebar-bg: #0F172A;
  --sidebar-text: #94A3B8;
  --sidebar-active: #E40000;
  --card-bg: #FFFFFF;
  --body-bg: #F1F5F9;
  --text-main: #0F172A;
  --text-muted: #64748B;
  --border-color: #E2E8F0;
  --table-hover: #F8FAFC;
  --topbar-bg: #FFFFFF;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.08), 0 2px 4px -1px rgba(0,0,0,0.04);
}

[data-bs-theme="dark"] {
  --sidebar-bg: #0B1120;
  --sidebar-text: #94A3B8;
  --sidebar-active: #EF4444;
  --card-bg: #1E293B;
  --body-bg: #0F172A;
  --text-main: #F8FAFC;
  --text-muted: #94A3B8;
  --border-color: #334155;
  --table-hover: #1E293B;
  --topbar-bg: #1E293B;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.4);
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background-color: var(--body-bg);
  color: var(--text-main);
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
}

/* Sidebar */
#sidebar-wrapper {
  min-height: 100vh;
  width: 260px;
  background-color: var(--sidebar-bg);
  transition: all 0.25s ease;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 1040;
  overflow-y: auto;
  scrollbar-width: thin;
}

#sidebar-wrapper::-webkit-scrollbar {
  width: 5px;
}
#sidebar-wrapper::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.2);
  border-radius: 3px;
}

/* System Accordion Headers */
.system-tile-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 1.15rem;
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  cursor: pointer;
  border-radius: 6px;
  margin: 0.3rem 0.5rem;
  transition: all 0.2s ease;
  text-decoration: none !important;
}
.system-tile-header:hover {
  background-color: rgba(255, 255, 255, 0.08);
}
.system-tile-header .chevron-icon {
  transition: transform 0.2s ease;
}
.system-tile-header[aria-expanded="true"] .chevron-icon {
  transform: rotate(90deg);
}

/* Dashboard Management Tiles */
.mgmt-tile-card {
  border-radius: 0.85rem;
  transition: all 0.25s ease;
  border: 1px solid var(--border-color);
  background: var(--card-bg);
}
.mgmt-tile-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 20px rgba(0,0,0,0.1) !important;
}

#sidebar-wrapper .sidebar-brand {
  padding: 1.25rem 1.5rem;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: #FFFFFF;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

#sidebar-wrapper .sidebar-brand span.highlight {
  color: #E40000;
}

#sidebar-wrapper .nav-link {
  color: var(--sidebar-text);
  padding: 0.75rem 1.5rem;
  font-size: 0.92rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  border-left: 3px solid transparent;
  transition: all 0.2s ease;
}

#sidebar-wrapper .nav-link:hover {
  color: #FFFFFF;
  background-color: rgba(255, 255, 255, 0.05);
}

#sidebar-wrapper .nav-link.active {
  color: #FFFFFF;
  background-color: rgba(228, 0, 0, 0.15);
  border-left-color: var(--primary-color);
  font-weight: 600;
}

#sidebar-wrapper .nav-header {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: #64748B;
  padding: 1rem 1.5rem 0.35rem 1.5rem;
  font-weight: 700;
}

/* Page Content */
#page-content-wrapper {
  margin-left: 260px;
  width: calc(100% - 260px);
  min-height: 100vh;
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
}

/* Topbar */
.topbar {
  background-color: var(--topbar-bg);
  border-bottom: 1px solid var(--border-color);
  padding: 0.85rem 1.5rem;
  position: sticky;
  top: 0;
  z-index: 1020;
}

/* Cards */
.card-metric {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  position: relative;
  overflow: hidden;
}

.card-metric:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.card-metric .metric-title {
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

.card-metric .metric-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.1;
}

.card-metric .metric-icon {
  width: 48px;
  height: 48px;
  border-radius: 0.6rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
}

.card-metric .metric-sub {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 0.4rem;
}

/* Operator Badges */
.badge-jio {
  background-color: #0066cc;
  color: #FFFFFF;
}
.badge-vi {
  background-color: #d90429;
  color: #FFFFFF;
}
.badge-bsnl {
  background-color: #2b9348;
  color: #FFFFFF;
}
.badge-idea {
  background-color: #f48c06;
  color: #FFFFFF;
}
.badge-ns {
  background-color: #6c757d;
  color: #FFFFFF;
}

.badge-confirmed {
  background-color: #10B981;
  color: #FFFFFF;
}
.badge-pending {
  background-color: #F59E0B;
  color: #FFFFFF;
}

/* Tables */
.table-custom {
  background-color: var(--card-bg);
  border-radius: 0.75rem;
  border: 1px solid var(--border-color);
  overflow: hidden;
}

.table-custom table {
  margin-bottom: 0;
  color: var(--text-main);
}

.table-custom thead th {
  background-color: rgba(15, 23, 42, 0.04);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
  padding: 0.85rem 1rem;
}

[data-bs-theme="dark"] .table-custom thead th {
  background-color: rgba(255, 255, 255, 0.04);
}

.table-custom tbody td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border-color);
  vertical-align: middle;
  font-size: 0.92rem;
}

.table-custom tbody tr:hover {
  background-color: var(--table-hover);
}

/* Primary Button */
.btn-airtel {
  background-color: var(--primary-color);
  color: #FFFFFF;
  border: none;
  font-weight: 600;
  border-radius: 0.5rem;
  padding: 0.5rem 1.25rem;
  transition: all 0.2s ease;
}

.btn-airtel:hover {
  background-color: var(--primary-hover);
  color: #FFFFFF;
}

/* Responsive sidebar */
@media (max-width: 991.98px) {
  #sidebar-wrapper {
    margin-left: -260px;
  }
  #sidebar-wrapper.toggled {
    margin-left: 0;
  }
  #page-content-wrapper {
    margin-left: 0;
    width: 100%;
  }
}