diff --git a/.replit b/.replit
index b0526f5..52d9378 100644
--- a/.replit
+++ b/.replit
@@ -22,6 +22,10 @@ externalPort = 3002
 localPort = 37531
 externalPort = 3001
 
+[[ports]]
+localPort = 40661
+externalPort = 3003
+
 [[ports]]
 localPort = 43349
 externalPort = 3000
diff --git a/client/src/pages/AuctionGuide.tsx b/client/src/pages/AuctionGuide.tsx
index decd01e..6b278f9 100644
--- a/client/src/pages/AuctionGuide.tsx
+++ b/client/src/pages/AuctionGuide.tsx
@@ -12,6 +12,10 @@ import {
 } from "lucide-react";
 
 export default function AuctionGuide() {
+  const handleGoBack = () => {
+    window.history.back();
+  };
+
   return (
     <div className="min-h-screen bg-gray-50">
       {/* Header */}
@@ -33,18 +37,17 @@ export default function AuctionGuide() {
                   variant="ghost" 
                   size="sm"
                   className="relative"
+                  onClick={handleGoBack}
                   data-testid="button-auction-guide"
                 >
                   <BookOpen className="h-4 w-4" />
                 </Button>
                 {/* Triangle indicator */}
-                <div className="absolute left-1/2 -translate-x-1/2 top-full">
-                  <svg width="16" height="8" viewBox="0 0 16 8" className="text-gray-50">
-                    <path 
-                      d="M 8 0 Q 8 2, 6 3 L 2 7 Q 0 8, 0 8 L 16 8 Q 16 8, 14 7 L 10 3 Q 8 2, 8 0 Z" 
-                      fill="currentColor"
-                    />
-                  </svg>
+                <div className="absolute left-1/2 -translate-x-1/2 top-full z-10">
+                  <div 
+                    className="w-0 h-0 border-l-[12px] border-l-transparent border-r-[12px] border-r-transparent border-b-[10px] border-b-gray-50"
+                    style={{ filter: 'drop-shadow(0 -1px 0px rgba(229, 231, 235, 1))' }}
+                  />
                 </div>
               </div>