/* Light, enterprise look: fixed navbar + fixed sidebar + card-based content */
body { background-color: #f8f9fa; }
.navbar { height: 56px; }
.sidebar {
  position: fixed;
  top: 56px;
  left: 0;
  width: 260px;
  height: calc(100vh - 56px);
  background: #ffffff;
  border-right: 1px solid #e5e7eb;
  overflow-y: auto;
}
.sidebar .nav-link { color: #374151; padding: 8px 12px; border-radius: 6px; }
.sidebar .nav-link.active, .sidebar .nav-link:hover { background-color: #f3f4f6; color: #111827; }
.main-content {
  margin-top: 56px; /* below navbar */
  margin-left: 260px; /* beside sidebar */
  min-height: calc(100vh - 56px);
}
.card { border-radius: 10px; }
.table thead th { background: #f9fafb; }
.form-control, .form-select { border-radius: 8px; }
.btn { border-radius: 8px; }
.small-muted { font-size: .875rem; color: #6b7280; }