:root {
  --na-bg: #f4f6f8;
  --na-sidebar: #1f2937;
  --na-accent: #0d6efd;
}

body {
  background: var(--na-bg);
  min-height: 100vh;
}

.na-sidebar {
  background: var(--na-sidebar);
  min-height: 100vh;
}

.na-sidebar .nav-link {
  color: rgba(255, 255, 255, 0.75);
  border-radius: 0.375rem;
  margin-bottom: 0.25rem;
}

.na-sidebar .nav-link:hover,
.na-sidebar .nav-link.active {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
}

.na-brand {
  font-weight: 700;
  letter-spacing: 0.02em;
}

.na-card {
  border: 0;
  box-shadow: 0 1px 2px rgba(16, 24, 40, 0.06), 0 1px 3px rgba(16, 24, 40, 0.1);
}

.na-muted {
  color: #6b7280;
}

.table td,
.table th {
  vertical-align: middle;
}

.na-loader {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  background: rgba(244, 246, 248, 0.72);
  backdrop-filter: blur(2px);
}

.na-loader[hidden] {
  display: none !important;
}

.na-loader-spinner {
  width: 2.5rem;
  height: 2.5rem;
  border: 3px solid #d1d5db;
  border-top-color: var(--na-accent);
  border-radius: 50%;
  animation: na-spin 0.7s linear infinite;
}

.na-loader-text {
  color: #374151;
  font-size: 0.95rem;
}

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

body.na-busy {
  cursor: wait;
}