no need; already in boots

sso/index.html

@@ -191,14 +191,13 @@
             display: block;
             width: 100%;
             height: 3px;
-            box-sizing: border-box;
             margin-top: 10px;
-            border-bottom: 1px solid #999;
+            border-bottom: 1px solid;
             border-image: linear-gradient(to right, transparent, #1984d1, #10c482, transparent) 1;
         }
 
         .box:hover::before {
-            border-bottom: 3px solid #999;
+            border-bottom: 3px solid;
         }
 
         .page-header.nohr {