/* Sidebar Filter Styles */
.sidebar-filter {
  margin-bottom: 1.5rem;
}

.filter-input {
  width: 100%;
  padding: 0.6rem 0.75rem;
  border: 1px solid #ddd;
  border-radius: var(--border-radius-sm);
  font-size: 0.9rem;
  transition: var(--transition);
  box-sizing: border-box;
}

.filter-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(0, 122, 204, 0.1);
}

.filter-input::placeholder {
  color: #999;
}

.category-item {
  transition: opacity 0.2s ease, max-height 0.2s ease;
  overflow: hidden;
}

.category-item.hidden {
  display: none;
}

.no-results-message {
  text-align: center;
  padding: 1rem;
  color: #999;
  font-size: 0.9rem;
}