:root {
  --primary-color: #4f46e5;
  --primary-dark: #4338ca;
  --secondary-color: #06b6d4;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --danger-color: #ef4444;
  --info-color: #3b82f6;
  --dark-color: #1e293b;
  --light-bg: #f8fafc;
  --border-color: #e2e8f0;
}

html {
  font-size: 14px;
  position: relative;
  min-height: 100%;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

body {
  margin-bottom: 60px;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--light-bg);
  color: #334155;
}

.bg-gradient-primary {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
}

.navbar-brand {
  font-size: 1.3rem;
  letter-spacing: -0.5px;
}

.navbar-dark .navbar-nav .nav-link {
  color: rgba(255, 255, 255, 0.85);
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: 0.375rem;
  transition: all 0.2s;
}

.navbar-dark .navbar-nav .nav-link:hover {
  color: #fff;
  background-color: rgba(255, 255, 255, 0.1);
}

.card {
  border: none;
  border-radius: 0.75rem;
  box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  transition: all 0.3s ease;
}

.card:hover {
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  transform: translateY(-2px);
}

.card-header {
  background-color: #fff;
  border-bottom: 2px solid var(--border-color);
  padding: 1.25rem 1.5rem;
  font-weight: 600;
  color: var(--dark-color);
}

.card-body {
  padding: 1.5rem;
}

.stat-card {
  border-radius: 0.75rem;
  padding: 1.5rem;
  color: white;
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 100px;
  height: 100px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  transform: translate(30%, -30%);
}

.stat-card .stat-icon {
  font-size: 2.5rem;
  opacity: 0.3;
  position: absolute;
  right: 1rem;
  top: 1rem;
}

.stat-card .stat-value {
  font-size: 2.5rem;
  font-weight: 700;
  margin: 0;
}

.stat-card .stat-label {
  font-size: 0.9rem;
  opacity: 0.9;
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.bg-gradient-blue {
  background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
}

.bg-gradient-orange {
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

.bg-gradient-cyan {
  background: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
}

.bg-gradient-red {
  background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
}

.bg-gradient-green {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.bg-gradient-purple {
  background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
}

.btn {
  padding: 0.625rem 1.25rem;
  font-weight: 500;
  border-radius: 0.5rem;
  transition: all 0.2s;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 6px -1px rgba(79, 70, 229, 0.3);
}

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

.btn-success:hover {
  background: #059669;
  border-color: #059669;
  transform: translateY(-1px);
  box-shadow: 0 4px 6px -1px rgba(16, 185, 129, 0.3);
}

.btn-sm {
  padding: 0.375rem 0.875rem;
  font-size: 0.875rem;
}

.badge {
  padding: 0.5rem 0.75rem;
  font-weight: 500;
  border-radius: 0.375rem;
}

.table {
  border-collapse: separate;
  border-spacing: 0;
}

.table thead th {
  background-color: #f8fafc;
  color: var(--dark-color);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  border-bottom: 2px solid var(--border-color);
  padding: 1rem;
}

.table tbody tr {
  transition: all 0.2s;
}

.table tbody tr:hover {
  background-color: #f8fafc;
}

.table tbody td {
  padding: 1rem;
  vertical-align: middle;
}

.form-control, .form-select {
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  padding: 0.625rem 0.875rem;
  transition: all 0.2s;
}

.form-control:focus, .form-select:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

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

.alert {
  border: none;
  border-radius: 0.75rem;
  padding: 1rem 1.25rem;
}

.page-header {
  margin-bottom: 2rem;
}

.page-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--dark-color);
  margin-bottom: 0.5rem;
}

.page-subtitle {
  color: #64748b;
  font-size: 1.1rem;
}

.shadow-sm {
  box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05) !important;
}

.footer {
  background-color: #fff;
  margin-top: 3rem;
}

.form-check-input:checked {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
}

.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: #94a3b8;
}

.empty-state i {
  font-size: 4rem;
  margin-bottom: 1rem;
  opacity: 0.3;
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--primary-dark);
}