redundant

static/style.css

@@ -180,18 +180,23 @@ summary {
 }
 
 summary::after {
-    content: '+';
+  content: "+";
   font-size: 1.2rem;
 }
 
 details[open] summary::after {
-    content: '-';
+  content: "-";
 }
 
 details[open] summary {
   border-bottom: 1px solid #333;
 }
 
+summary::marker,
+summary::-webkit-details-marker {
+  list-style-type: none;
+  display: none;
+}
 .route-list {
   display: grid;
   gap: 10px;
@@ -255,4 +260,3 @@ details[open] summary {
   color: #666;
   margin-top: 20px;
 }
-