Edit bottombar style

@@ -8,13 +8,13 @@ import { SiThunderbird } from "react-icons/si";
 function Bottombar() {
   return (
     <div className="bottombar">
-      <NavLink to="/tell">
+      <NavLink to="/tell" className="bottomBtn">
         <FaKiwiBird />
       </NavLink>
-      <NavLink to="/users">
+      <NavLink to="/users" className="bottomBtn">
         <GiNestBirds />
       </NavLink>
-      <NavLink to="/message">
+      <NavLink to="/message" className="bottomBtn">
         <SiThunderbird />
       </NavLink>
     </div>

@@ -46,6 +46,12 @@
   font-size: 1.5rem;
   height: 2.8rem;
   a {
-    box-shadow: 3px 3px 3px 3px gray;
+    box-shadow: 3px 3px 3px 0px gray;
+  }
+  .bottomBtn {
+    margin-right: 0.2rem;
+    margin-left: 0.2rem;
+    border: 1px solid gray;
+    border-radius: 3px;
   }
 }