:root {
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --secondary: #64748b;
  --success: #10b981;
  --info: #0ea5e9;
  --warning: #f59e0b;
  --danger: #ef4444;
  --dark: #0f172a;
  --light: #f8fafc;
  --body-bg: #f8fafc;
  --card-bg: #ffffff;
  --text-main: #1e293b;
  --text-muted: #64748b;
  --border-color: #e2e8f0;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --radius: 0.75rem;
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --bottom-nav-height: 64px;
}

.theme-dark {
  --primary: #818cf8;
  --primary-hover: #6366f1;
  --body-bg: #0f172a;
  --card-bg: #1e293b;
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --border-color: #334155;
  --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.3);
  --shadow-lg: 0 20px 25px -5px rgb(0 0 0 / 0.3), 0 8px 10px -6px rgb(0 0 0 / 0.3);
}

/* Bootstrap Overrides for Dark Mode */
.theme-dark .bg-body-tertiary {
  background-color: var(--body-bg) !important;
}

.theme-dark .bg-light {
  background-color: #1e293b !important;
}

.theme-dark .bg-light-subtle {
  background-color: rgba(255, 255, 255, 0.05) !important;
}

.theme-dark .text-dark {
  color: #f1f5f9 !important;
}

.theme-dark .border {
  border-color: var(--border-color) !important;
}

.theme-dark .table {
  --bs-table-color: var(--text-main);
  --bs-table-bg: transparent;
  --bs-table-border-color: var(--border-color);
}

.theme-dark .table-hover tbody tr:hover {
  color: var(--text-main);
  background-color: rgba(255, 255, 255, 0.05);
}

.theme-dark .form-control,
.theme-dark .form-select {
  background-color: #1e293b;
  border-color: #334155;
  color: #f1f5f9;
}

.theme-dark .form-control:focus,
.theme-dark .form-select:focus {
  background-color: #1e293b;
  border-color: var(--primary);
  color: #f1f5f9;
}

.theme-dark .input-group-text {
  background-color: #334155;
  border-color: #334155;
  color: #94a3b8;
}

.theme-dark .btn-close {
  filter: invert(1) grayscale(100%) brightness(200%);
}

body {
  font-family: var(--font-sans);
  background-color: var(--body-bg);
  color: var(--text-main);
  transition: background-color 0.3s ease, color 0.3s ease;
  padding-bottom: calc(var(--bottom-nav-height) + 20px);
}

/* Typography & Utils */
h1 {
  font-size: 1.75rem;
  font-weight: 600;
  letter-spacing: -0.025em;
}

h2 {
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.025em;
}

h3 {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.025em;
}

h4,
h5,
h6 {
  font-weight: 600;
  letter-spacing: -0.025em;
}

.fw-semibold {
  font-weight: 600 !important;
}

.text-muted {
  color: var(--text-muted) !important;
}

.mono {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

/* Cards */
.card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.card-body {
  padding: 1.25rem;
}

.kpi-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1.25rem;
  height: 100%;
  position: relative;
  overflow: hidden;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  text-align: center;
}

.kpi-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: transparent;
  transition: background 0.3s ease;
}

.kpi-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.kpi-title {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 0;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-align: center;
}

.kpi-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.025em;
  text-align: center;
}

.kpi-icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  transition: all 0.3s ease;
  position: relative;
  margin: 0 auto;
}

.kpi-icon::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  opacity: 0.4;
  filter: blur(8px);
  z-index: -1;
  transition: opacity 0.3s ease;
}

.kpi-card:hover .kpi-icon {
  transform: scale(1.1) rotate(5deg);
}

.kpi-card:hover .kpi-icon::after {
  opacity: 0.8;
}

/* KPI Variants */
.kpi--primary .kpi-icon {
  background: rgba(99, 102, 241, 0.1);
  color: var(--primary);
}

.kpi--primary .kpi-icon::after {
  background: var(--primary);
}

.kpi--primary:hover::before {
  background: var(--primary);
}

.kpi--success .kpi-icon {
  background: rgba(16, 185, 129, 0.1);
  color: var(--success);
}

.kpi--success .kpi-icon::after {
  background: var(--success);
}

.kpi--success:hover::before {
  background: var(--success);
}

.kpi--warning .kpi-icon {
  background: rgba(245, 158, 11, 0.1);
  color: var(--warning);
}

.kpi--warning .kpi-icon::after {
  background: var(--warning);
}

.kpi--warning:hover::before {
  background: var(--warning);
}

.kpi--danger .kpi-icon {
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger);
}

.kpi--danger .kpi-icon::after {
  background: var(--danger);
}

.kpi--danger:hover::before {
  background: var(--danger);
}

.kpi--info .kpi-icon {
  background: rgba(14, 165, 233, 0.1);
  color: var(--info);
}

.kpi--info .kpi-icon::after {
  background: var(--info);
}

.kpi--info:hover::before {
  background: var(--info);
}

/* Navbar */
.navbar {
  background-color: rgba(255, 255, 255, 0.8) !important;
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 0.75rem 0;
  box-shadow: var(--shadow-sm) !important;
}

.theme-dark .navbar {
  background-color: rgba(15, 23, 42, 0.8) !important;
}

.navbar-brand {
  color: var(--text-main) !important;
  font-weight: 700;
  font-size: 1rem;
}

.nav-link {
  color: var(--text-muted) !important;
  font-weight: 500;
  transition: color 0.2s ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary) !important;
}

/* Bottom Navigation */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--bottom-nav-height);
  background-color: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-around;
  align-items: center;
  z-index: 1030;
  box-shadow: 0 -1px 3px rgba(0, 0, 0, 0.05);
  padding-bottom: env(safe-area-inset-bottom);
}

.theme-dark .bottom-nav {
  background-color: rgba(15, 23, 42, 0.9);
}

.bottom-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.7rem;
  font-weight: 500;
  width: 100%;
  height: 100%;
  transition: color 0.2s ease;
}

.bottom-nav-item i {
  font-size: 1.25rem;
  margin-bottom: 2px;
  transition: transform 0.2s ease;
}

.bottom-nav-item.active {
  color: var(--primary);
}

.bottom-nav-item.active i {
  transform: translateY(-2px);
}

/* Buttons */
.btn {
  font-weight: 500;
  padding: 0.4rem 0.8rem;
  border-radius: 0.5rem;
  transition: all 0.2s ease;
}

.btn-primary {
  background-color: var(--primary);
  border-color: var(--primary);
  box-shadow: 0 4px 6px -1px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  border-color: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 8px -1px rgba(99, 102, 241, 0.4);
}

.btn-outline-light {
  color: var(--text-muted);
  border-color: var(--border-color);
}

.btn-outline-light:hover {
  background-color: var(--body-bg);
  color: var(--text-main);
  border-color: var(--border-color);
}

/* Button Group Improvements */
.btn-group {
  flex-wrap: nowrap;
}

.btn-group .btn {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
}

/* Form Controls */
.form-control,
.form-select {
  background-color: var(--card-bg);
  border-color: var(--border-color);
  color: var(--text-main);
  border-radius: 0.5rem;
  padding: 0.4rem 0.75rem;
  font-size: 0.875rem;
}

.form-control:focus,
.form-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
  background-color: var(--card-bg);
  color: var(--text-main);
}

.form-control-sm {
  padding: 0.35rem 0.65rem;
  font-size: 0.8125rem;
}

input[type="date"] {
  min-width: 110px;
}

/* Charts */
.chart-box {
  position: relative;
  height: 250px;
  width: 100%;
}

/* Loading Overlay */
.page-loading {
  position: fixed;
  inset: 0;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(4px);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.3s ease;
}

.theme-dark .page-loading {
  background: rgba(15, 23, 42, 0.8);
}

.page-loading.d-none {
  opacity: 0;
  pointer-events: none;
  display: flex !important;
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fade-in {
  animation: fadeIn 0.5s ease-out forwards;
}

/* Login Page */
.login-page {
  background: linear-gradient(135deg, #f0f9ff 0%, #e0e7ff 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-dark .login-page {
  background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 100%);
}

.login-card {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.theme-dark .login-card {
  background: rgba(30, 41, 59, 0.9);
  border-color: rgba(255, 255, 255, 0.05);
}

/* Utilities */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.25rem 0.75rem;
  background-color: var(--body-bg);
  border: 1px solid var(--border-color);
  border-radius: 9999px;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.subtle {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: #94a3b8;
}

.theme-dark ::-webkit-scrollbar-thumb {
  background: #334155;
}

.theme-dark ::-webkit-scrollbar-thumb:hover {
  background: #475569;
}

/* Desktop Enhancements (Min-Width) */
@media (min-width: 992px) {
  :root {
    --radius: 1rem;
  }

  body {
    padding-bottom: 0;
  }

  .container {
    max-width: 1200px;
  }

  .card-body {
    padding: 1.5rem;
  }

  .kpi-card {
    padding: 1.5rem;
  }

  .kpi-value {
    font-size: 1.85rem;
  }

  .kpi-title {
    font-size: 0.875rem;
  }

  .kpi-icon {
    width: 52px;
    height: 52px;
    font-size: 1.35rem;
    border-radius: 14px;
  }

  h1 {
    font-size: 2.5rem;
  }

  h2 {
    font-size: 2rem;
  }

  h3 {
    font-size: 1.75rem;
  }

  .navbar-brand {
    font-size: 1.1rem;
  }

  .chart-box {
    height: 280px;
  }

  .btn {
    padding: 0.5rem 1rem;
  }

  .bottom-nav {
    display: none;
  }
}