feat: add settings modal for map display

src/styles.css

@@ -150,6 +150,13 @@ a {
   line-height: 1.1;
 }
 
+.brand-header {
+  display: flex;
+  align-items: flex-start;
+  justify-content: space-between;
+  gap: 0.9rem;
+}
+
 .brand-header p {
   margin: 0.25rem 0 0;
   color: #66726a;
@@ -313,6 +320,12 @@ a {
   line-height: 1.2;
 }
 
+.section-heading h3 {
+  margin: 0;
+  font-size: 0.98rem;
+  line-height: 1.2;
+}
+
 .section-heading span,
 .field-note {
   color: #66726a;
@@ -821,6 +834,12 @@ a {
   height: 100%;
 }
 
+.map-view-dimmed .leaflet-pane,
+.map-view-dimmed .leaflet-control-container {
+  opacity: 0.55;
+  transition: opacity 140ms ease;
+}
+
 .map-view .leaflet-control-zoom {
   overflow: hidden;
   border: 1px solid #a7b6ad;
@@ -867,6 +886,20 @@ a {
   cursor: not-allowed;
 }
 
+.map-view .leaflet-tooltip {
+  border: 1px solid #a7b6ad;
+  border-radius: 6px;
+  background: #ffffff;
+  color: #17211c;
+  box-shadow: 0 4px 14px rgb(23 33 28 / 14%);
+  font-size: 0.76rem;
+  font-weight: 720;
+}
+
+.map-view .leaflet-tooltip::before {
+  border-top-color: #ffffff;
+}
+
 .result-marker {
   display: grid;
   place-items: center;
@@ -960,6 +993,131 @@ a {
   line-height: 1.45;
 }
 
+.modal-backdrop {
+  position: fixed;
+  z-index: 3000;
+  inset: 0;
+  display: grid;
+  place-items: center;
+  background: rgb(23 33 28 / 38%);
+  padding: 1rem;
+}
+
+.settings-modal {
+  display: grid;
+  gap: 1rem;
+  width: min(560px, 100%);
+  max-height: min(760px, calc(100vh - 2rem));
+  overflow: auto;
+  border: 1px solid #a7b6ad;
+  border-radius: 10px;
+  background: #fafbf8;
+  padding: 1rem;
+  box-shadow:
+    0 24px 70px rgb(23 33 28 / 26%),
+    0 8px 24px rgb(23 33 28 / 16%);
+}
+
+.settings-header {
+  display: flex;
+  align-items: flex-start;
+  justify-content: space-between;
+  gap: 1rem;
+  border-bottom: 1px solid #dde5de;
+  padding-bottom: 0.8rem;
+}
+
+.settings-header h2 {
+  margin: 0;
+  font-size: 1.25rem;
+}
+
+.settings-header p {
+  margin: 0.25rem 0 0;
+  color: #66726a;
+  font-size: 0.88rem;
+  line-height: 1.4;
+}
+
+.settings-section {
+  display: grid;
+  gap: 0.75rem;
+  border-bottom: 1px solid #e1e6df;
+  padding-bottom: 1rem;
+}
+
+.settings-section:last-child {
+  border-bottom: 0;
+  padding-bottom: 0;
+}
+
+.settings-toggle-grid {
+  display: grid;
+  gap: 0.5rem;
+}
+
+.settings-toggle-grid label {
+  display: flex;
+  align-items: center;
+  gap: 0.55rem;
+  min-height: 38px;
+  border: 1px solid #c8d2ca;
+  border-radius: 7px;
+  background: linear-gradient(#ffffff, #f7f9f6);
+  padding: 0.48rem 0.6rem;
+  font-weight: 620;
+  cursor: pointer;
+}
+
+.settings-toggle-grid label:hover {
+  border-color: #7f9588;
+  background: #f3f9f6;
+}
+
+.settings-toggle-grid input {
+  position: relative;
+  flex: 0 0 1rem;
+  width: 1rem !important;
+  min-width: 1rem;
+  max-width: 1rem;
+  height: 1rem;
+  min-height: 1rem;
+  margin: 0;
+  border: 1px solid #8ea098;
+  border-radius: 4px;
+  appearance: none;
+  background: #ffffff;
+  padding: 0;
+}
+
+.settings-toggle-grid input::before {
+  content: "";
+  position: absolute;
+  left: 50%;
+  top: 46%;
+  width: 0.28rem;
+  height: 0.52rem;
+  border-right: 2px solid #ffffff;
+  border-bottom: 2px solid #ffffff;
+  transform: translate(-50%, -50%) rotate(45deg) scale(0);
+  transition: transform 120ms ease;
+}
+
+.settings-toggle-grid input:checked {
+  border-color: #226a5d;
+  background: #226a5d;
+}
+
+.settings-toggle-grid input:checked::before {
+  transform: translate(-50%, -50%) rotate(45deg) scale(1);
+}
+
+.settings-toggle-grid label:has(input:checked) {
+  border-color: #5f9488;
+  background: #e5f2ee;
+  box-shadow: inset 0 0 0 1px rgb(34 106 93 / 16%);
+}
+
 @media (max-width: 900px) {
   .app-shell {
     grid-template-columns: 1fr;
@@ -1001,4 +1159,9 @@ a {
   .query-actions button {
     width: 100%;
   }
+
+  .settings-header {
+    align-items: stretch;
+    flex-direction: column;
+  }
 }