diff --git a/pages/404.php b/pages/404.php
index 4273bcb..7ccd27f 100644
--- a/pages/404.php
+++ b/pages/404.php
@@ -1,5 +1,5 @@
 <div class="row justify-content-center">
-    <div class="col-xs-12 col-sm-6 col-md-4 col-lg-4">
+    <div class="col-12 col-sm-6 col-md-4 col-lg-4">
         <div class="alert alert-warning"><b><?php lang("404 error");?></b><br /> <?php lang("page not found"); ?></div>
     </div>
 </div>
\ No newline at end of file
diff --git a/pages/authlog.php b/pages/authlog.php
index ad178b6..c088fcc 100644
--- a/pages/authlog.php
+++ b/pages/authlog.php
@@ -14,11 +14,11 @@ redirectifnotloggedin();
     <thead>
         <tr>
             <th data-priority="0"></th>
-            <th data-priority="1"><i class="fas fa-fw fa-calendar hidden-xs"></i> <?php lang('logtime'); ?></th>
-            <th data-priority="1"><i class="fas fa-fw fa-server hidden-xs"></i> <?php lang('logtype'); ?></th>
-            <th data-priority="2"><i class="fas fa-fw fa-id-badge hidden-xs"></i> <?php lang('username'); ?></th>
-            <th data-priority="3"><i class="fas fa-fw fa-globe hidden-xs"></i> <?php lang('ip address'); ?></th>
-            <th data-priority="3"><i class="fas fa-fw fa-info-circle hidden-xs"></i> <?php lang('other data'); ?></th>
+            <th data-priority="1"><i class="fas fa-fw fa-calendar d-none d-md-inline"></i> <?php lang('logtime'); ?></th>
+            <th data-priority="1"><i class="fas fa-fw fa-server d-none d-md-inline"></i> <?php lang('logtype'); ?></th>
+            <th data-priority="2"><i class="fas fa-fw fa-id-badge d-none d-md-inline"></i> <?php lang('username'); ?></th>
+            <th data-priority="3"><i class="fas fa-fw fa-globe d-none d-md-inline"></i> <?php lang('ip address'); ?></th>
+            <th data-priority="3"><i class="fas fa-fw fa-info-circle d-none d-md-inline"></i> <?php lang('other data'); ?></th>
         </tr>
     </thead>
     <tbody>
@@ -27,11 +27,11 @@ redirectifnotloggedin();
     <tfoot>
         <tr>
             <th data-priority="0"></th>
-            <th data-priority="1"><i class="fas fa-fw fa-calendar hidden-xs"></i> <?php lang('logtime'); ?></th>
-            <th data-priority="1"><i class="fas fa-fw fa-server hidden-xs"></i> <?php lang('logtype'); ?></th>
-            <th data-priority="2"><i class="fas fa-fw fa-id-badge hidden-xs"></i> <?php lang('username'); ?></th>
-            <th data-priority="3"><i class="fas fa-fw fa-globe hidden-xs"></i> <?php lang('ip address'); ?></th>
-            <th data-priority="3"><i class="fas fa-fw fa-info-circle hidden-xs"></i> <?php lang('other data'); ?></th>
+            <th data-priority="1"><i class="fas fa-fw fa-calendar d-none d-md-inline"></i> <?php lang('logtime'); ?></th>
+            <th data-priority="1"><i class="fas fa-fw fa-server d-none d-md-inline"></i> <?php lang('logtype'); ?></th>
+            <th data-priority="2"><i class="fas fa-fw fa-id-badge d-none d-md-inline"></i> <?php lang('username'); ?></th>
+            <th data-priority="3"><i class="fas fa-fw fa-globe d-none d-md-inline"></i> <?php lang('ip address'); ?></th>
+            <th data-priority="3"><i class="fas fa-fw fa-info-circle d-none d-md-inline"></i> <?php lang('other data'); ?></th>
     </tfoot>
 </table>
 <br />
diff --git a/pages/managers.php b/pages/managers.php
index b487120..6cdd175 100644
--- a/pages/managers.php
+++ b/pages/managers.php
@@ -31,7 +31,7 @@ if ($VARS['man'] && $database->has('accounts', ['username' => $VARS['man']])) {
                     <div class="form-group">
                         <label for="manager-box"><i class="fas fa-id-card"></i> <?php lang("manager"); ?></label><br />
                         <div class="input-group">
-                            <input type="text"<?php if ($employees === false) { ?>id="manager-box"<?php } ?> class="form-control" value="<?php echo $user ?>" name="manager" placeholder="<?php lang("type to select a manager"); ?>" <?php
+                            <input type="text"<?php if ($employees === false) { ?> id="manager-box"<?php } ?> class="form-control" value="<?php echo $user ?>" name="manager" placeholder="<?php lang("type to select a manager"); ?>" <?php
                             if ($employees !== false) {
                                 echo "readonly";
                             }
@@ -80,7 +80,7 @@ if ($VARS['man'] && $database->has('accounts', ['username' => $VARS['man']])) {
 
         <input type="hidden" name="action" value="editmanager" />
         <input type="hidden" name="source" value="managers" />
-        
+
         <?php if ($employees !== false) { ?>
             <div class="card-footer d-flex">
                 <button type="submit" class="btn btn-success ml-auto" id="save-btn"><i class="fas fa-save"></i> <?php lang("save"); ?></button>
diff --git a/pages/users.php b/pages/users.php
index d8252a3..c59b9f9 100644
--- a/pages/users.php
+++ b/pages/users.php
@@ -16,12 +16,12 @@ redirectifnotloggedin();
         <tr>
             <th data-priority="0"></th>
             <th data-priority="1"><?php lang('actions'); ?></th>
-            <th data-priority="1"><i class="fas fa-fw fa-user hidden-xs"></i> <?php lang('name'); ?></th>
-            <th data-priority="2"><i class="fas fa-fw fa-id-badge hidden-xs"></i> <?php lang('username'); ?></th>
-            <th data-priority="3"><i class="fas fa-fw fa-envelope hidden-xs"></i> <?php lang('email'); ?></th>
-            <th data-priority="4"><i class="fas fa-fw fa-lock hidden-xs"></i> <?php lang('2fa'); ?></th>
-            <th data-priority="3"><i class="fas fa-fw fa-check-circle hidden-xs"></i> <?php lang('status'); ?></th>
-            <th data-priority="4"><i class="fas fa-fw fa-server hidden-xs"></i> <?php lang('type'); ?></th>
+            <th data-priority="1"><i class="fas fa-fw fa-user d-none d-md-inline"></i> <?php lang('name'); ?></th>
+            <th data-priority="2"><i class="fas fa-fw fa-id-badge d-none d-md-inline"></i> <?php lang('username'); ?></th>
+            <th data-priority="3"><i class="fas fa-fw fa-envelope d-none d-md-inline"></i> <?php lang('email'); ?></th>
+            <th data-priority="4"><i class="fas fa-fw fa-lock d-none d-md-inline"></i> <?php lang('2fa'); ?></th>
+            <th data-priority="3"><i class="fas fa-fw fa-check-circle d-none d-md-inline"></i> <?php lang('status'); ?></th>
+            <th data-priority="4"><i class="fas fa-fw fa-server d-none d-md-inline"></i> <?php lang('type'); ?></th>
         </tr>
     </thead>
     <tbody>
@@ -30,12 +30,12 @@ redirectifnotloggedin();
         <tr>
             <th data-priority="0"></th>
             <th data-priority="1"><?php lang('actions'); ?></th>
-            <th data-priority="1"><i class="fas fa-fw fa-user hidden-xs"></i> <?php lang('name'); ?></th>
-            <th data-priority="2"><i class="fas fa-fw fa-id-badge hidden-xs"></i> <?php lang('username'); ?></th>
-            <th data-priority="3"><i class="fas fa-fw fa-envelope hidden-xs"></i> <?php lang('email'); ?></th>
-            <th data-priority="4"><i class="fas fa-fw fa-lock hidden-xs"></i> <?php lang('2fa'); ?></th>
-            <th data-priority="3"><i class="fas fa-fw fa-check-circle hidden-xs"></i> <?php lang('status'); ?></th>
-            <th data-priority="4"><i class="fas fa-fw fa-server hidden-xs"></i> <?php lang('type'); ?></th>
+            <th data-priority="1"><i class="fas fa-fw fa-user d-none d-md-inline"></i> <?php lang('name'); ?></th>
+            <th data-priority="2"><i class="fas fa-fw fa-id-badge d-none d-md-inline"></i> <?php lang('username'); ?></th>
+            <th data-priority="3"><i class="fas fa-fw fa-envelope d-none d-md-inline"></i> <?php lang('email'); ?></th>
+            <th data-priority="4"><i class="fas fa-fw fa-lock d-none d-md-inline"></i> <?php lang('2fa'); ?></th>
+            <th data-priority="3"><i class="fas fa-fw fa-check-circle d-none d-md-inline"></i> <?php lang('status'); ?></th>
+            <th data-priority="4"><i class="fas fa-fw fa-server d-none d-md-inline"></i> <?php lang('type'); ?></th>
     </tfoot>
 </table>
 <script nonce="<?php echo $SECURE_NONCE; ?>">