.catalog-layout { display: grid; grid-template-columns: 260px minmax(0, 1fr); gap: 36px; }
.catalog-sidebar { align-self: start; position: sticky; top: 24px; }
.catalog-menu { display: flex; flex-direction: column; gap: 8px; }
.catalog-menu a { padding: 16px; border-radius: 8px; color: #475569; }
.catalog-menu a:hover, .catalog-menu a.active { background: #eff6ff; color: #1d4ed8; }
.catalog-menu a.active { font-weight: 600; }
.catalog-card { padding: 28px; border: 1px solid #e2e8f0; border-radius: 10px; box-shadow: 0 2px 4px rgba(0,0,0,.04); overflow-wrap: anywhere; }
.catalog-phone { display: flex; flex-wrap: wrap; gap: 8px 24px; align-items: baseline; margin: 8px 0; }
.catalog-details { border-top: 1px solid #edf0f5; padding-top: 16px; margin-top: 20px; }
.catalog-details dd { margin-top: 4px; }
.catalog-mobile-menu { display: none; }
@media (max-width: 767px) {
  .catalog-layout { display: block; }
  .catalog-sidebar { display: none; }
  .catalog-mobile-menu { display: block; border: 1px solid #e2e8f0; border-radius: 8px; padding: 16px; margin-bottom: 24px; }
  .catalog-mobile-menu summary { cursor: pointer; color: #1d4ed8; }
  .catalog-mobile-menu nav { margin-top: 12px; }
  .catalog-card { padding: 20px; }
  .catalog-content h1 { font-size: 1.6rem; }
}