html, body { margin: 0; height: 100%; font-family: system-ui, sans-serif; }
#map { position: absolute; inset: 0; }
.panel {
  position: absolute; top: 10px; left: 10px; z-index: 1;
  background: rgba(255,255,255,.92); padding: 8px 12px; border-radius: 6px;
  font-size: 13px; box-shadow: 0 1px 4px rgba(0,0,0,.25); max-width: 280px;
}
.panel a { color: inherit; }

/* Panels added with ElementControl sit in MapLibre's corner stack instead of absolute positioning. */
.maplibregl-ctrl.panel { position: static; }
.panel { box-sizing: border-box; width: 300px; max-width: calc(100vw - 20px); line-height: 1.4;
  max-height: calc(100vh - 20px); max-height: calc(100dvh - 20px); overflow-y: auto; }

/* Title row with a collapse toggle; the chevron points down when collapsed. */
.panel-head { display: flex; align-items: flex-start; gap: 6px; }
.panel-head h1 { flex: 1; }
.panel-head button { flex: none; width: 32px; height: 32px; margin: -4px -6px 0 0; padding: 0;
  display: grid; place-items: center; border: 0; border-radius: 4px; background: none; cursor: pointer; }
.panel-head button:hover { background: rgba(0,0,0,.06); }
.panel.collapsed .panel-head svg { transform: rotate(180deg); }

/* Phones: leave room for the top-right controls, which show icons only. */
@media (max-width: 640px) {
  .panel { max-width: calc(100vw - 70px); }
  .maplibregl-ctrl-group button.ctrl-labelled span { display: none; }
}

/* Title, description, and collapsible About inside a panel. */
.panel h1 { font-size: 16px; margin: 2px 0 4px; line-height: 1.25; }
.panel .description { margin: 0; color: #444; }
.panel details summary { cursor: pointer; font-weight: 600; }
.panel details summary:focus:not(:focus-visible) { outline: none; } /* keep the ring for keyboard users only */
.panel details > div { font-size: 12px; margin-top: 4px; }
.panel details p, .panel details ul { margin: 4px 0; }
.panel details ul { padding-left: 18px; }
.panel .back { display: block; margin-top: 8px; font-size: 12px; }

/* Scale bar control (lib/ui.js). */
.scale-bar { background: rgba(255,255,255,.85); padding: 2px 4px 0; border-radius: 4px; line-height: 0; }

/* Labelled ButtonControl (lib/ui.js), e.g. "Study area". */
.maplibregl-ctrl-group button.ctrl-labelled { width: auto; display: flex; align-items: center; gap: 5px;
  padding: 0 8px; font: 600 12px system-ui, sans-serif; color: #333; white-space: nowrap; }