Update zIndex

src/app.css

@@ -1,76 +1,7 @@
-:root {
-  font-family: Inter, system-ui, Avenir, Helvetica, Arial, sans-serif;
-  line-height: 1.5;
-  font-weight: 400;
+@tailwind base;
+@tailwind components;
+@tailwind utilities;
 
-  font-synthesis: none;
-  text-rendering: optimizeLegibility;
-  -webkit-font-smoothing: antialiased;
-  -moz-osx-font-smoothing: grayscale;
-  -webkit-text-size-adjust: 100%;
-}
-
-a {
-  font-weight: 500;
-  color: #646cff;
-  text-decoration: inherit;
-}
-a:hover {
-  color: #535bf2;
-}
-
-body {
-  margin: 0;
-  display: flex;
-  place-items: center;
-  min-width: 320px;
-  min-height: 100vh;
-}
-
-h1 {
-  font-size: 3.2em;
-  line-height: 1.1;
-}
-
-.card {
-  padding: 2em;
-}
-
-#app {
-  max-width: 1280px;
-  margin: 0 auto;
-  padding: 2rem;
-  text-align: center;
-}
-
-button {
-  border-radius: 8px;
-  border: 1px solid transparent;
-  padding: 0.6em 1.2em;
-  font-size: 1em;
-  font-weight: 500;
-  font-family: inherit;
-  background-color: #1a1a1a;
-  cursor: pointer;
-  transition: border-color 0.25s;
-}
-button:hover {
-  border-color: #646cff;
-}
-button:focus,
-button:focus-visible {
-  outline: 4px auto -webkit-focus-ring-color;
-}
-
-@media (prefers-color-scheme: light) {
-  :root {
-    color: #213547;
-    background-color: #ffffff;
-  }
-  a:hover {
-    color: #747bff;
-  }
-  button {
-    background-color: #f9f9f9;
-  }
-}
+.popover-content {
+  z-index: 30;
+}

src/lib/Map.svelte

@@ -175,7 +175,7 @@ vehiclesInit.subscribe((v) => {
         paint={{'line-width': 5, 'line-color': 'orange'}}
         beforeLayerType={(l) => {console.log(l.type); return false}}
       />
-      <MarkerLayer let:feature>
+      <MarkerLayer let:feature zIndex={10}>
         <div class="quay">{feature.properties?.name ?? ""}</div>
       </MarkerLayer>
     </GeoJSON>

src/lib/VehicleMarker.svelte

@@ -39,10 +39,10 @@ const clickHandler = () => {
 
 </style>
 
-<Marker {lngLat} on:click={clickHandler}>
+<Marker {lngLat} on:click={clickHandler} zIndex={( $selectedLine == lineRef ? 20 : 0)}>
   <Bus {iconSize} {bearing} face={lineNumber} />
 
-  <Popup openOn="hover" offset={[0, -10]}>
+  <Popup openOn="hover" offset={[0, -10]} popupClass="popover-content" >
     <div class="popover-content">
       <h4>{lineNumber}: {lineName}</h4>
       <p>