Formatting, tidy up, transparent auth dialog background.

examples/style.css

@@ -2,12 +2,11 @@
     color-scheme: light dark;
 }
 
-body:has(iframe) {
+body:has(#auth-iframe) {
     overflow: hidden;    /* prevent scrolling the page */
 }
 
-iframe {
-    /* Fullscreen overlay */
+#auth-iframe {
     border: none;
     position: fixed;
     top: 0;
@@ -15,8 +14,8 @@ iframe {
     width: 100%;
     height: 100%;
     z-index: 9999;
-    /* Transparent background with a backdrop effect (optional) */
     color-scheme: auto;
+    background: transparent;
     backdrop-filter: blur(4px) brightness(0.7);
     -webkit-backdrop-filter: blur(4px) brightness(0.7);
 }