feat: show feature information on map click

styles.css

@@ -308,6 +308,86 @@ button:disabled {
   inset: 0;
 }
 
+.feature-modal[hidden] {
+  display: none;
+}
+
+.feature-modal {
+  position: fixed;
+  z-index: 20;
+  inset: 0;
+  display: grid;
+  padding: 24px;
+  place-items: center;
+}
+
+.feature-modal-backdrop {
+  position: absolute;
+  inset: 0;
+  background: rgba(31, 42, 46, 0.35);
+  backdrop-filter: blur(3px);
+}
+
+.feature-modal-dialog {
+  position: relative;
+  width: min(100%, 360px);
+  padding: 28px;
+  border: 1px solid var(--panel-border);
+  border-radius: 24px;
+  background: #fffefb;
+  box-shadow: var(--shadow);
+}
+
+.feature-modal-close {
+  position: absolute;
+  top: 12px;
+  right: 12px;
+  display: grid;
+  width: 36px;
+  height: 36px;
+  padding: 0;
+  place-items: center;
+  border: 1px solid var(--panel-border);
+  border-radius: 50%;
+  background: transparent;
+  color: var(--ink);
+  box-shadow: none;
+  font-size: 1.5rem;
+  line-height: 1;
+}
+
+.feature-modal-kind {
+  margin-bottom: 6px;
+  color: var(--accent-strong);
+  font-size: 0.85rem;
+  font-weight: 700;
+  letter-spacing: 0.08em;
+  text-transform: uppercase;
+}
+
+.feature-details {
+  margin: 20px 0 0;
+}
+
+.feature-details div {
+  display: flex;
+  align-items: baseline;
+  justify-content: space-between;
+  gap: 16px;
+  padding: 14px 0;
+  border-top: 1px solid var(--panel-border);
+}
+
+.feature-details dt {
+  color: var(--muted);
+}
+
+.feature-details dd {
+  margin: 0;
+  font-size: 1.1rem;
+  font-weight: 700;
+}
+
 .map-wrap .ol-zoom {
   top: 16px;
   right: 16px;