added css

style.css

@@ -0,0 +1,109 @@
+.mapboxgl-ctrl-logo { display: none !important; }
+
+html, body, #map {
+  height: 100%;
+  margin: 0;
+  padding: 0;
+  font-family: 'Open Sans', sans-serif;
+}
+
+/* Semi‑transparent popup background */
+.mapboxgl-popup-content {
+  background: rgba(0, 0, 0, 0.1) !important;
+  backdrop-filter: blur(4px);
+  border-radius: 10px !important;    /* ← rounded corners */
+  filter: drop-shadow(0 0 1px gray) !important; /* <- gives a border */
+}
+
+/* For the p inside the popup */
+.mapboxgl-popup-content p {
+  margin: 0 0 -5px 0 !important;  /* top/right/bottom/left – adjust bottom as you like */
+}
+
+.mapboxgl-popup-content h3 {
+  margin: 0 0 5px 0 !important;  /* top/right/bottom/left – adjust bottom as you like */
+}
+
+
+/* For the image inside the popup */
+.mapboxgl-popup-content img {
+  border-radius: 5px !important;    /* ← rounded corners */
+  filter: drop-shadow(0 0 1px gray) !important; /* <- gives a border */
+
+  width: 100%;       /* fill the popup’s width */
+  max-width: none;   /* ignore any mapbox defaults */
+  height: auto;      /* maintain aspect ratio */
+
+}
+
+/* hide the popup tip/arrow */
+.mapboxgl-popup-tip {
+  display: none;
+}
+
+/* Legend box */
+#legend {
+  /* location */
+  position: absolute;
+  top: 10px;
+  left: 10px;
+  padding: 8px 12px;
+  border-radius: 6px;
+  z-index: 1; /* above the map */
+
+  /* styling */
+  background: rgba(0, 0, 0, 0.1);
+  backdrop-filter: blur(4px);
+  filter: drop-shadow(0 0 1px gray) !important; /* <- gives a border */
+
+  /* content */
+  font-family: sans-serif;
+  font-size: 14px;
+  line-height: 1.4;
+}
+
+#legend h4 {
+  margin: 0 0 0 0;
+  font-size: 16px;
+}
+
+#legend p {
+  margin: 5px 0 0 0;
+}
+
+.legend-color {
+  display: inline-block;
+  width: 12px;
+  height: 12px;
+  margin-right: 6px;
+  vertical-align: middle;
+  border: 1px solid #999;
+}
+
+/* Big Picture */
+/* full‑screen, centered, hidden by default */
+#overlay {
+  position: fixed;
+  top: 0; left: 0; right: 0; bottom: 0;
+  background: rgba(0, 0, 0, 0.75);               /* <- dim the background */
+  backdrop-filter: blur(4px);                   /* <- blur the background */
+  filter: drop-shadow(0 0 4px gray) !important; /* <- gives a border */
+  display: none;
+  justify-content: center;
+  align-items: center;
+  z-index: 1000;
+}
+
+/* when we add the “show” class it becomes visible/flex */
+#overlay.show {
+  display: flex;
+}
+
+/* the enlarged image itself */
+#overlay-img {
+  max-width: 90%;
+  max-height: 90%;
+  border-radius: 5px;
+  box-shadow: 0 0 10px rgba(0,0,0,0.5);
+}
+