diff --git a/BoardIndex.template.php b/BoardIndex.template.php
index 78f33df..46eb500 100644
--- a/BoardIndex.template.php
+++ b/BoardIndex.template.php
@@ -70,7 +70,6 @@ function template_main()
 
 		echo '
 		<div class="main_container">
-			<div class="khbiseau_topright_color"></div>
 			<div class="cat_bar ', $category['is_collapsed'] ? 'collapsed' : '', '" id="category_', $category['id'], '">
 				<div class="info">
 				';
@@ -133,7 +132,6 @@ function template_main()
 
 		echo '
 			</div><!-- #category_[id]_boards -->
-		<div class="khbiseau_bottom_white"></div>
 		</div><!-- .main_container -->';
 	}
 
@@ -362,7 +360,6 @@ function template_info_center()
 
 	// Here's where the "Info Center" starts...
 	echo '
-	<div class="khbiseau_topright_color"></div>
 	<div class="roundframe" id="info_center">
 		<div class="title_bar">
 			<h2 class="titlebg">
diff --git a/Display.template.php b/Display.template.php
index dc51fe4..9e113bf 100644
--- a/Display.template.php
+++ b/Display.template.php
@@ -32,8 +32,7 @@ function template_main()
 		</div>';
 
 	// Show new topic info here?
-	echo '<div class="khbiseau_topright_khcolor"></div>
-		<div id="display_head" class="khbb_head_subject">
+	echo '<div id="display_head" class="khbb_head_subject">
 			<h2 class="display_title">
 				<span id="top_subject">', $context['subject'], '</span>', ($context['is_locked']) ? ' <span class="main_icons lock"></span>' : '', ($context['is_sticky']) ? ' <span class="main_icons sticky"></span>' : '', '
 			</h2>
diff --git a/Login.template.php b/Login.template.php
index 4484b9a..f157950 100644
--- a/Login.template.php
+++ b/Login.template.php
@@ -19,7 +19,6 @@ function template_login()
 
 	echo '
 		<div class="login">
-			<div class="khbiseau_topright_color"></div>
 			<div class="cat_bar">
 				<h2 class="catbg">
 					<span class="main_icons login"></span> ', $txt['login'], '
@@ -157,7 +156,6 @@ function template_login()
 
 	echo '
 			</div><!-- .roundframe -->
-		<div class="khbiseau_bottom_white"></div>
 		</div><!-- .login -->';
 }
 
diff --git a/Memberlist.template.php b/Memberlist.template.php
index 002abb9..881ef87 100644
--- a/Memberlist.template.php
+++ b/Memberlist.template.php
@@ -23,7 +23,6 @@ function template_main()
 			', template_button_strip($context['memberlist_buttons'], 'right'), '
 			<div class="pagelinks floatleft">', $context['page_index'], '</div>
 		</div>
-		<div class="khbiseau_topright_color"></div>
 		<div class="cat_bar">
 			<h2 class="catbg">
 				<span class="floatleft">', $txt['members_list'], '</span>';
@@ -129,7 +128,6 @@ function template_main()
 	echo '
 				</tbody>
 			</table>
-			<div class="khbiseau_bottom_white"></div>
 		</div><!-- #mlist -->';
 
 	// Show the page numbers again. (makes 'em easier to find!)
diff --git a/MessageIndex.template.php b/MessageIndex.template.php
index 1939644..08d1978 100644
--- a/MessageIndex.template.php
+++ b/MessageIndex.template.php
@@ -18,7 +18,6 @@ function template_main()
 	global $context, $settings, $options, $scripturl, $modSettings, $txt;
 
 	echo '
-	<div class="khbiseau_topright_khcolor"></div>
 	<div id="display_head">
 			<h2 class="display_title">', $context['name'], '</h2>';
 
@@ -59,7 +58,6 @@ function template_main()
 		echo '
 	<div id="board_', $context['current_board'], '_childboards" class="boardindex_table main_container">
 		
-		<div class="cat_bar without_biseau">
 			<div class="info">
 			';
 			// Like collapse icon, but don't collapse because I don't know how. TODO !
@@ -109,7 +107,6 @@ function template_main()
 
 		echo '
 	</div><!-- #board_[current_board]_childboards -->
-	<div class="khbiseau_bottom_white"></div>
 ';
 	}
 
@@ -295,7 +292,6 @@ function template_main()
 		}
 		echo '
 			</div><!-- #topic_container -->
-			<div class="khbiseau_bottom_white"></div>
 		';
 
 		echo '<div class="righttext" id="quick_actions">';
diff --git a/PersonalMessage.template.php b/PersonalMessage.template.php
index 976b277..675fda2 100644
--- a/PersonalMessage.template.php
+++ b/PersonalMessage.template.php
@@ -23,7 +23,6 @@ function template_pm_above()
 	// Show the capacity bar, if available.
 	if (!empty($context['limit_bar']))
 		echo '
-		<div class="khbiseau_topright_color"></div>
 		<div class="cat_bar">
 			<h2 class="catbg">
 				<span class="floatleft">', $txt['pm_capacity'], ':</span>
@@ -207,7 +206,6 @@ function template_folder()
 			if (!empty($context['current_pm_subject']))
 			{
 				echo '
-			<div class="khbiseau_topright_color"></div>
 			<div class="cat_bar">
 				<h2 class="catbg">
 					<span>', $txt['conversation'], '</span>
@@ -616,7 +614,6 @@ function template_subject_list()
 	global $context, $settings, $txt, $scripturl;
 
 	echo '
-	<div class="khbiseau_topright_color"></div>
 	<div class="cat_bar">
 		<h2 class="catbg">
 			', $context['folder'] == 'sent' ? $txt['sent_items'] : $context['current_label'], '
@@ -758,7 +755,6 @@ function template_search()
 
 	echo '
 	<form action="', $scripturl, '?action=pm;sa=search2" method="post" accept-charset="', $context['character_set'], '" name="searchform" id="searchform">
-		<div class="khbiseau_topright_color"></div>
 		<div class="cat_bar">
 			<h2 class="catbg">', $txt['pm_search_title'], '</h2>
 		</div>
@@ -902,7 +898,6 @@ function template_search_results()
 	global $context, $txt;
 
 	echo '
-		<div class="khbiseau_topright_color"></div>
 		<div class="cat_bar">
 			<h2 class="catbg">', $txt['pm_search_results'], '</h2>
 		</div>
@@ -975,7 +970,6 @@ function template_send()
 	if (!empty($context['send_log']))
 	{
 		echo '
-		<div class="khbiseau_topright_color"></div>
 		<div class="cat_bar">
 			<h2 class="catbg">', $txt['pm_send_report'], '</h2>
 		</div>
@@ -999,7 +993,6 @@ function template_send()
 	// Show the preview of the personal message.
 	echo '
 		<div id="preview_section"', isset($context['preview_message']) ? '' : ' class="hidden"', '>
-			<div class="khbiseau_topright_color"></div>
 			<div class="cat_bar">
 				<h2 class="catbg">
 					<span id="preview_subject">', empty($context['preview_subject']) ? '' : $context['preview_subject'], '</span>
@@ -1016,7 +1009,6 @@ function template_send()
 	// Main message editing box.
 	echo '
 		<form action="', $scripturl, '?action=pm;sa=send2" method="post" accept-charset="', $context['character_set'], '" name="postmodify" id="postmodify" class="flow_hidden" onsubmit="submitonce(this);">
-			<div class="khbiseau_topright_color"></div>
 			<div class="cat_bar">
 				<h2 class="catbg">
 					<span class="main_icons inbox icon" title="', $txt['new_message'], '"></span> ', $txt['new_message'], '
@@ -1271,7 +1263,6 @@ function template_send()
 	if ($context['reply'])
 		echo '
 		<br><br>
-		<div class="khbiseau_topright_color"></div>
 		<div class="cat_bar">
 			<h2 class="catbg">', $txt['subject'], ': ', $context['quoted_message']['subject'], '</h2>
 		</div>
@@ -1338,7 +1329,6 @@ function template_ask_delete()
 	global $context, $scripturl, $txt;
 
 	echo '
-		<div class="khbiseau_topright_color"></div>
 		<div class="cat_bar">
 			<h2 class="catbg">
 				', ($context['delete_all'] ? $txt['delete_message'] : $txt['delete_all']), '
@@ -1359,7 +1349,6 @@ function template_prune()
 	global $context, $scripturl, $txt;
 
 	echo '
-		<div class="khbiseau_topright_color"></div>
 		<div class="cat_bar">
 			<h2 class="catbg">', $txt['pm_prune'], '</h2>
 		</div>
@@ -1388,7 +1377,6 @@ function template_labels()
 
 	echo '
 	<form action="', $scripturl, '?action=pm;sa=manlabels" method="post" accept-charset="', $context['character_set'], '">
-		<div class="khbiseau_topright_color"></div>
 		<div class="cat_bar">
 			<h2 class="catbg">', $txt['pm_manage_labels'], '</h2>
 		</div>
@@ -1448,7 +1436,6 @@ function template_labels()
 		<input type="hidden" name="', $context['session_var'], '" value="', $context['session_id'], '">
 	</form>
 	<form action="', $scripturl, '?action=pm;sa=manlabels" method="post" accept-charset="', $context['character_set'], '">
-		<div class="khbiseau_topright_color"></div>
 		<div class="cat_bar">
 			<h2 class="catbg">', $txt['pm_label_add_new'], '</h2>
 		</div>
@@ -1481,7 +1468,6 @@ function template_report_message()
 		<div class="information">
 			', $txt['pm_report_desc'], '
 		</div>
-		<div class="khbiseau_topright_color"></div>
 		<div class="cat_bar">
 			<h2 class="catbg">', $txt['pm_report_title'], '</h2>
 		</div>
@@ -1533,7 +1519,6 @@ function template_report_message_complete()
 	global $context, $txt, $scripturl;
 
 	echo '
-		<div class="khbiseau_topright_color"></div>
 		<div class="cat_bar">
 			<h2 class="catbg">', $txt['pm_report_title'], '</h2>
 		</div>
@@ -1552,7 +1537,6 @@ function template_rules()
 
 	echo '
 	<form action="', $scripturl, '?action=pm;sa=manrules" method="post" accept-charset="', $context['character_set'], '" name="manRules" id="manrules">
-		<div class="khbiseau_topright_color"></div>
 		<div class="cat_bar">
 			<h2 class="catbg">', $txt['pm_manage_rules'], '</h2>
 		</div>
@@ -1773,7 +1757,6 @@ function template_add_rule()
 
 	echo '
 	<form action="', $scripturl, '?action=pm;sa=manrules;save;rid=', $context['rid'], '" method="post" accept-charset="', $context['character_set'], '" name="addrule" id="addrule" class="flow_hidden">
-		<div class="khbiseau_topright_color"></div>
 		<div class="cat_bar">
 			<h2 class="catbg">', $context['rid'] == 0 ? $txt['pm_add_rule'] : $txt['pm_edit_rule'], '</h2>
 		</div>
@@ -1890,7 +1873,6 @@ function template_add_rule()
 				<span id="actionAddHere"></span><br>
 				<a href="#" onclick="addActionOption(); return false;" id="addonjs2" style="display: none;">(', $txt['pm_rule_add_action'], ')</a>
 			</fieldset>
-			<div class="khbiseau_topright_color"></div>
 			<div class="cat_bar">
 				<h2 class="catbg">', $txt['pm_rule_description'], '</h2>
 			</div>
@@ -1945,7 +1927,6 @@ function template_showPMDrafts()
 	global $context, $scripturl, $txt;
 
 	echo '
-		<div class="khbiseau_topright_color"></div>
 		<div class="cat_bar">
 			<h2 class="catbg">
 				<span class="main_icons inbox"></span> ', $txt['drafts_show'], '
diff --git a/Poll.template.php b/Poll.template.php
index f97d629..682b508 100644
--- a/Poll.template.php
+++ b/Poll.template.php
@@ -55,7 +55,6 @@ function template_main()
 	echo '
 	<div id="edit_poll">
 		<form action="' . $scripturl . '?action=editpoll2', $context['is_edit'] ? '' : ';add', ';topic=' . $context['current_topic'] . '.' . $context['start'] . '" method="post" accept-charset="', $context['character_set'], '" onsubmit="submitonce(this);" name="postmodify" id="postmodify">
-			<div class="khbiseau_topright_color"></div>
 			<div class="cat_bar">
 				<h2 class="catbg">', $context['page_title'], '</h2>
 			</div>';
@@ -155,7 +154,6 @@ function template_main()
 			<input type="hidden" name="seqnum" value="', $context['form_sequence_number'], '">
 			<input type="hidden" name="' . $context['session_var'] . '" value="' . $context['session_id'] . '">
 		</form>
-		<div class="khbiseau_bottom_white"></div>
 	</div><!-- #edit_poll -->
 	';
 }
diff --git a/Post.template.php b/Post.template.php
index e0c9a30..488ce48 100644
--- a/Post.template.php
+++ b/Post.template.php
@@ -72,7 +72,6 @@ function template_main()
 	// If the user wants to see how their message looks - the preview section is where it's at!
 	echo '
 			<div id="preview_section"', isset($context['preview_message']) ? '' : ' style="display: none;"', '>
-				<div class="khbiseau_topright_color"></div>
 				<div class="cat_bar">
 					<h2 class="catbg">
 						<span id="preview_subject">', empty($context['preview_subject']) ? '&nbsp;' : $context['preview_subject'], '</span>
@@ -81,7 +80,6 @@ function template_main()
 				<div id="preview_body" class="windowbg">
 					', empty($context['preview_message']) ? '<br>' : $context['preview_message'], '
 				</div>
-				<div class="khbiseau_bottom_white"></div>
 			</div>
 			<br>';
 
@@ -91,7 +89,6 @@ function template_main()
 
 	// Start the main table.
 	echo '
-			<div class="khbiseau_topright_color"></div>
 			<div class="cat_bar">
 				<h2 class="catbg">', $context['page_title'], '</h2>
 			</div>
@@ -500,7 +497,6 @@ function template_main()
 					</span>
 				</div><!-- .roundframe -->
 			</div><!-- #post_area -->
-			<div class="khbiseau_bottom_white"></div>
 			<br class="clear">';
 
 	// Assuming this isn't a new topic pass across the last message id.
@@ -632,7 +628,6 @@ function template_main()
 	{
 		echo '
 		<div id="recent" class="flow_hidden main_section">
-			<div class="khbiseau_topright_color"></div>
 			<div class="cat_bar cat_bar_round">
 				<h2 class="catbg">', $txt['topic_summary'], '</h2>
 			</div>
@@ -678,7 +673,6 @@ function template_main()
 		}
 
 		echo '
-		<div class="khbiseau_bottom_white"></div>
 		</div><!-- #recent -->
 		<script>
 			var aIgnoreToggles = new Array();';
@@ -860,7 +854,6 @@ function template_announce()
 	echo '
 	<div id="announcement">
 		<form action="', $scripturl, '?action=announce;sa=send" method="post" accept-charset="', $context['character_set'], '">
-			<div class="khbiseau_topright_color"></div>
 			<div class="cat_bar">
 				<h2 class="catbg">', $txt['announce_title'], '</h2>
 			</div>
diff --git a/Profile.template.php b/Profile.template.php
index bf520d3..1f618b6 100644
--- a/Profile.template.php
+++ b/Profile.template.php
@@ -495,8 +495,7 @@ function template_showPosts()
 		</div>', !empty($context['page_index']) ? '
 		<div class="pagesection">
 			<div class="pagelinks">' . $context['page_index'] . '</div>
-		</div>
-		<div class="khbiseau_topright_white"></div>' : '';
+		</div>' : '';
 
 	// Are we displaying posts or attachments?
 	if (!isset($context['attachments']))
@@ -552,8 +551,6 @@ function template_showPosts()
 			', isset($context['attachments']) ? $txt['show_attachments_none'] : ($context['is_topics'] ? $txt['show_topics_none'] : $txt['show_posts_none']), '
 		</div>';
 
-	echo '<div class="khbiseau_bottom_white"></div>';
-
 	// Show more page numbers.
 	if (!empty($context['page_index']))
 		echo '
diff --git a/Recent.template.php b/Recent.template.php
index f419ec7..c62ec58 100644
--- a/Recent.template.php
+++ b/Recent.template.php
@@ -19,7 +19,6 @@ function template_recent()
 
 	echo '
 	<div id="recent" class="main_section">
-		<div class="khbiseau_topright_khcolor"></div>
 		<div id="display_head" class="information">
 			<h2 class="display_title">
 				<span id="top_subject">', $txt['recent_posts'], '</span>
@@ -60,7 +59,6 @@ function template_recent()
 	}
 
 	echo '
-		<div class="khbiseau_bottom_white"></div>
 		<div class="pagesection">
 			<div class="pagelinks">', $context['page_index'], '</div>
 		</div>
diff --git a/Register.template.php b/Register.template.php
index f109b56..1a6c21b 100644
--- a/Register.template.php
+++ b/Register.template.php
@@ -22,14 +22,12 @@ function template_registration_agreement()
 
 	if (!empty($context['agreement']))
 		echo '
-			<div class="khbiseau_topright_color"></div>
 			<div class="cat_bar">
 				<h2 class="catbg">', $txt['registration_agreement'], '</h2>
 			</div>
 			<div class="roundframe">
 				<div>', $context['agreement'], '</div>
-			</div>
-			<div class="khbiseau_bottom_white"></div>';
+			</div>';
 
 	if (!empty($context['privacy_policy']))
 		echo '
@@ -104,7 +102,6 @@ function template_registration_form()
 
 	echo '
 		<form action="', !empty($modSettings['force_ssl']) ? strtr($scripturl, array('http://' => 'https://')) : $scripturl, '?action=signup2" method="post" accept-charset="', $context['character_set'], '" name="registration" id="registration" onsubmit="return verifyAgree();">
-			<div class="khbiseau_topright_color"></div>
 			<div class="cat_bar">
 				<h2 class="catbg">', $txt['registration_form'], '</h2>
 			</div>
@@ -180,8 +177,7 @@ function template_registration_form()
 
 	echo '
 				</fieldset>
-			</div><!-- .roundframe -->
-			<div class="khbiseau_bottom_white"></div>';
+			</div><!-- .roundframe -->';
 
 	// If we have either of these, show the extra group.
 	if (!empty($context['profile_fields']) || !empty($context['custom_fields']))
diff --git a/Search.template.php b/Search.template.php
index 20d581f..409e949 100644
--- a/Search.template.php
+++ b/Search.template.php
@@ -19,7 +19,6 @@ function template_main()
 	global $context, $txt, $scripturl, $modSettings;
 
 	echo '
-	<div class="khbiseau_topright_color"></div>
 	<form action="', $scripturl, '?action=search2" method="post" accept-charset="', $context['character_set'], '" name="searchform" id="searchform">';
 
 	if (!empty($context['search_errors']))
diff --git a/css/index.css b/css/index.css
index 10f1d35..c070476 100644
--- a/css/index.css
+++ b/css/index.css
@@ -3342,10 +3342,7 @@ h2 .collapse {
     width: 55% ;
     display:flex;
     align-items: center;
-    padding: 0;
-}
-div.cat_bar.without_biseau {
-	padding-top: 1em;
+	padding: 1em 0 0 0;
 }
 .cat_bar .info > span {
 	margin-left: 1em;
@@ -3397,8 +3394,7 @@ div.cat_bar.without_biseau {
 	display: inline-block;
 }
 .main_container {
-	/* pas de marge pour les biseaux
-	 * margin-bottom: 0.5em;*/
+	margin: 0 0 0.5em 0;
 }
 .up_contain {
 	overflow: hidden;
@@ -4065,8 +4061,7 @@ ul.post_options li {
 /* Cat_bar / catbg */
 div.cat_bar {
 	background: var(--color2);
-	padding: 0;
-	padding-bottom: 1em;
+	padding: 0 0 1em 0;
 	color: var(--neutral-light-color);
 	margin-top: 0;
 }
@@ -4813,48 +4808,6 @@ img.theme_thumbnail {
 	display:none;
 }
 
-/* Biseaux */
-.khbiseau_bottom_white {
-	border-style: solid;
-	border-color: white transparent transparent transparent;
-	border-width: 0.5em;
-	padding: 0;
-	background-color: transparent !important;
-	}
-.khbiseau_bottom_color {
-	border-style: solid;
-	border-color: var(--color2) transparent transparent transparent;
-	border-width: 0.5em;
-	padding: 0;
-	background-color: transparent !important;
-	}
-
-.khbiseau_topright_white {
-	border-style: solid;
-	border-color: transparent transparent #fff transparent;
-	border-width: 0 1.5em 1.5em 0;
-}
-
-.khbiseau_topright_color {
-	border-style: solid;
-	border-color: transparent transparent var(--color2) transparent;
-	border-width: 0 1em 1em 0;
-}
-.khbiseau_topright_khcolor {
-	border-style: solid;
-	border-color: transparent transparent var(--mmf-color) transparent;
-	border-width: 0 1em 1em 0;
-}
-
-.khbiseau_right_color {
-	border-style: solid;
-	border-color: transparent transparent red red;
-	border-width: 1.5em 0em 1.5em 1.5em;
-	height: 100%;
-	position: absolute;
-	right: 0;
-}
-
 /* Petit hexagone */
 .not_toggle {
 	padding-left: 1em;
diff --git a/index.template.php b/index.template.php
index 165a765..c1bb42f 100644
--- a/index.template.php
+++ b/index.template.php
@@ -493,7 +493,6 @@ function template_body_below()
 		echo '
 			</div>
 		</div>
-		<div class="khbiseau_bottom_color"></div>
 	</div><!-- #footer -->
 
 	</div><!-- #wrapper -->