Drill: Filter UI: faceted filter with active chips, counts, clear-all, URL-synced state. Target: filters persist across reload.
Interpretation: Seismic monitoring station register on a dark Linear-style surface with a single indigo accent — 30 stations across type/region/status facets plus an elevation-band radio, search, and sort. Every option carries a live counterfactual count (what adding it would yield), zero-count options stay discoverable but inert with network totals, and the full filter state round-trips through the URL hash with working browser history. Mobile converts the rail to a bottom sheet with 44px rows and the table to grid-template-areas cards.
Every station in the network, filterable by instrument class, region, operational status and elevation band. Filter state lives in the URL — bookmark or share any view.
| Region | Type | Status | Ch | |||||
|---|---|---|---|---|---|---|---|---|