diff --git a/catalog.php b/catalog.php
index 5bbf5f9..c979ff3 100644
--- a/catalog.php
+++ b/catalog.php
@@ -11,6 +11,32 @@ require_once 'core/classes/user.php';
 if (isset($_SESSION['user'])) {
 $user = new User($con, $_SESSION['user']);
 }
+
+$possiblePages = [
+  0,
+  1,
+  2,
+  3,
+  4,
+  5,
+  6,
+  7,
+  8,
+  9,
+  10,
+  11
+];
+
+if(isset($_GET["p"])) {
+  $page = (int) $_GET["p"];
+  if(!in_array($page,$possiblePages)) {
+    header('location: /catalog');
+    exit;
+  }
+} else {
+  $page = 0;
+}
+
 $getitstarted = new PartyStarter;
 $getitstarted->header();
 ?> </head>
@@ -33,31 +59,31 @@ $getitstarted->header();
           <br>
           <h4>Category</h4>
         </li>
-        <a href="/catalog" class="list-group-item active" aria-current="true">All categories</a>
-        <a href="?p=1" class="list-group-item">Hats</a>
-        <a href="?p=2" class="list-group-item">Shirts</a>
-        <a href="?p=3" class="list-group-item">Pants</a>
-        <a href="?p=4" class="list-group-item">Gears</a>
-        <a href="?p=5" class="list-group-item">Packages</a>
-        <button class="list-group-item text-start" type="button" data-bs-toggle="dropdown" aria-expanded="false">Body parts</button>
+        <a href="/catalog" class="list-group-item<?php if($page == 0) { ?> active<?php } ?>" aria-current="true">All categories</a>
+        <a href="?p=1" class="list-group-item<?php if($page == 1) { ?> active<?php } ?>">Hats</a>
+        <a href="?p=2" class="list-group-item<?php if($page == 2) { ?> active<?php } ?>">Shirts</a>
+        <a href="?p=3" class="list-group-item<?php if($page == 3) { ?> active<?php } ?>">Pants</a>
+        <a href="?p=4" class="list-group-item<?php if($page == 4) { ?> active<?php } ?>">Gears</a>
+        <a href="?p=5" class="list-group-item<?php if($page == 5) { ?> active<?php } ?>">Packages</a>
+        <button class="list-group-item text-start<?php if($page == 6 || $page == 7 || $page == 8 || $page == 9 || $page == 10 || $page == 11) { ?> active<?php } ?>" type="button" data-bs-toggle="dropdown" aria-expanded="false">Body parts</button>
         <ul class="dropdown-menu">
           <li>
-            <a class="dropdown-item" href="?bp=1">Heads</a>
+            <a class="dropdown-item<?php if($page == 6) { ?> active<?php } ?>" href="?p=6">Heads</a>
           </li>
           <li>
-            <a class="dropdown-item" href="?bp=2">Torso</a>
+            <a class="dropdown-item<?php if($page == 7) { ?> active<?php } ?>" href="?p=7">Torso</a>
           </li>
           <li>
-            <a class="dropdown-item" href="?bp=3">Left arm</a>
+            <a class="dropdown-item<?php if($page == 8) { ?> active<?php } ?>" href="?p=8">Left arm</a>
           </li>
           <li>
-            <a class="dropdown-item" href="?bp=4">Right arm</a>
+            <a class="dropdown-item<?php if($page == 9) { ?> active<?php } ?>" href="?p=9">Right arm</a>
           </li>
           <li>
-            <a class="dropdown-item" href="?bp=5">Left leg</a>
+            <a class="dropdown-item<?php if($page == 10) { ?> active<?php } ?>" href="?p=10">Left leg</a>
           </li>
           <li>
-            <a class="dropdown-item" href="?bp=6">Right leg</a>
+            <a class="dropdown-item<?php if($page == 11) { ?> active<?php } ?>" href="?p=11">Right leg</a>
           </li>
         </ul>
         <li class="list-group-item">
diff --git a/css/global.css b/css/global.css
index c7f6ead..99c4423 100644
--- a/css/global.css
+++ b/css/global.css
@@ -1,6 +1,6 @@
 .headerLogo{
     background-image: url(/assets/icons/Grublox.png);
     background-size: 131px 30px;
-    width: 131px;
-    height: 30px;
+    max-width: 131px;
+    max-height: 30px;
 }
\ No newline at end of file
diff --git a/error.php b/error.php
index 8ebc418..61afa0c 100644
--- a/error.php
+++ b/error.php
@@ -14,7 +14,7 @@ $conType = $_POST['err'];
 } else {
 $conType = $_GET['err'];	
 }
-if(isset($conType)) {
+if(!isset($conType)) {
 header("Location: /");	
 }
 if($conType == 404) {