Add styles for download button

Added styles for download button with hover effect.

Author: NovaDev404

web/styles.css

@@ -130,6 +130,20 @@ main {
   transform: scale(1.05);      /* pop effect */
 }
 
+
+.download-button {
+  border: none;
+  background-color: skyblue;
+  font-size: 3dvw;
+  border-radius: 0.75dvw;
+  cursor: pointer;
+}
+
+.download-button:hover {
+  background-color: lightblue; /* slightly darker/stronger blue */
+  transform: scale(1.05);      /* pop effect */
+}
+
 .advanced-href {
   bottom: 0;
   left: 0;