fixed a bit of css

app/(main)/team-selection/page.js

@@ -58,7 +58,7 @@ export default function TeamSelection() {
     return (
         <div className="team-selection-container">
             <div className="page-header">
-                <div className="back-button">←</div>
+                <div className="back-button"></div>
                 <div className="page-title">Team Selection</div>
                 <div className="placeholder"></div>
             </div>