:root {
  --primary: #1e3a8a;
  --primary-light: #3b82f6;
  --primary-dark: #1e40af;
  --secondary: #64748b;
  --success: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  --info: #06b6d4;
  --light: #f8fafc;
  --dark: #0f172a;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-600: #4b5563;
  --gray-900: #111827;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--gray-50);
  color: var(--gray-900);
  line-height: 1.6;
}

/* Login Page */
.login-page {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-light) 100%);
}

.login-page .card {
  border-radius: 16px;
  overflow: hidden;
}

.logo-icon {
  color: var(--primary);
}

/* Navbar */
.navbar-dark {
  background: var(--dark) !important;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Sidebar */
.sidebar {
  position: fixed;
  top: 56px;
  bottom: 0;
  left: 0;
  z-index: 100;
  padding: 0;
  box-shadow: 2px 0 4px rgba(0, 0, 0, 0.05);
  background-color: white;
  overflow-y: auto;
}

.sidebar .nav-link {
  color: var(--gray-600);
  padding: 0.75rem 1rem;
  font-weight: 500;
  transition: all 0.2s;
}

.sidebar .nav-link:hover {
  color: var(--primary);
  background-color: var(--gray-100);
}

.sidebar .nav-link.active {
  color: var(--primary);
  background-color: var(--light);
  border-left: 3px solid var(--primary);
}

.sidebar-heading {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
}

/* Main Content */
main {
  margin-top: 56px;
}

/* Cards */
.card {
  border-radius: 12px;
  transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
  transform: translateY(-2px);
}

/* KPI Icons */
.kpi-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Buttons */
.btn {
  border-radius: 8px;
  padding: 0.5rem 1.25rem;
  font-weight: 500;
  transition: all 0.2s;
}

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

.btn-primary:hover {
  background-color: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(30, 58, 138, 0.3);
}

/* Tables */
.table {
  font-size: 0.95rem;
}

.table thead th {
  border-bottom: 2px solid var(--gray-200);
  font-weight: 600;
  color: var(--gray-600);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.5px;
}

.table-hover tbody tr:hover {
  background-color: var(--gray-50);
}

/* Badges */
.badge {
  padding: 0.35em 0.65em;
  font-weight: 500;
  border-radius: 6px;
}

/* Forms */
.form-control,
.form-select {
  border-radius: 8px;
  border: 1px solid var(--gray-200);
  padding: 0.625rem 0.875rem;
}

.form-control:focus,
.form-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 0.2rem rgba(30, 58, 138, 0.15);
}

.form-label {
  font-weight: 500;
  color: var(--gray-900);
  margin-bottom: 0.5rem;
}

/* Modals */
.modal-content {
  border-radius: 12px;
  border: none;
}

.modal-header {
  border-bottom: 1px solid var(--gray-200);
  padding: 1.25rem 1.5rem;
}

.modal-body {
  padding: 1.5rem;
}

.modal-footer {
  border-top: 1px solid var(--gray-200);
  padding: 1rem 1.5rem;
}

/* Alerts */
.alert {
  border-radius: 8px;
  border: none;
}

/* Progress bars */
.progress {
  border-radius: 4px;
  background-color: var(--gray-200);
}

.progress-bar {
  border-radius: 4px;
}

/* Utilities */
.shadow-sm {
  box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06) !important;
}

.shadow {
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06) !important;
}

.shadow-lg {
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05) !important;
}

/* Responsive */
@media (max-width: 767.98px) {
  .sidebar {
    top: 56px;
  }

  main {
    margin-top: 56px;
  }
}

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

::-webkit-scrollbar-track {
  background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
  background: var(--gray-600);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--gray-900);
}