/* Filter sidebar sticky for desktop */
.filter-sidebar {
  position: sticky;
  top: 1rem;
  max-height: calc(100vh - 2rem);
  overflow-y: auto;
}

/* Hide scrollbar for cleaner look */
.filter-sidebar::-webkit-scrollbar {
  width: 4px;
}

.filter-sidebar::-webkit-scrollbar-track {
  background: #f1f1f1;
}

.filter-sidebar::-webkit-scrollbar-thumb {
  background: #888;
  border-radius: 2px;
}

/* AJAX loading indicator */
.loading-spinner {
  border: 3px solid #f3f3f3;
  border-top: 3px solid #7e22ce;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  animation: spin 1s linear infinite;
  margin: 20px auto;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Mobile filter panel animation */
.filter-panel-open {
  transform: translateX(0) !important;
}