src/styles/nav.module.scss

@@ -182,7 +182,12 @@
             bottom: 0;
             right: 0;
             left: 0;
-            background: #323232;
+            background: linear-gradient(
+              to top right,
+              #292929,
+              #343434,
+              #292929
+            );
             z-index: -1;
             border-radius: 10px;
           }

src/styles/popup.css

@@ -89,12 +89,14 @@
   font-size: 20px;
   position: relative;
   cursor: pointer;
+  border: solid 1px rgba(255, 255, 255, 0);
 }
 
 .popUpMainCardTopClose:hover {
   transition: ease 0.4s;
   color: rgba(255, 255, 255, 0.75);
   box-shadow: 0 0 8px 0 rgb(0, 0, 0, 0.1);
+  border: solid 1px rgba(255, 255, 255, 0.1);
 }
 
 .popUpMainCardTopInfo {
@@ -116,7 +118,7 @@
   bottom: 0;
   right: 0;
   left: 0;
-  background: #323232;
+  background: linear-gradient(to top right, #262626, #292929, #262626);
   /*z-index: -1;*/
   border-radius: 10px;
 }