diff --git a/src/scss/_definitions.scss b/src/scss/_definitions.scss
index 79741c4..bd678c2 100644
--- a/src/scss/_definitions.scss
+++ b/src/scss/_definitions.scss
@@ -108,15 +108,16 @@ $screen-xxl-min: 1600px;
   border-radius: $border-radius $border-radius $border-radius $border-radius;
 }
 
-@mixin button-style($size) {
-    position: relative;
-    z-index:1;
-    overflow: visible;
+@mixin shape-style($size) {
     @include borders();
     @include border-radius($btn-radius);
 
     background-color:transparent;
 
+    // Biseau
+    position: relative;
+    z-index:1;
+    overflow: visible;
     &:before {
         content: " ";
         position: absolute;
@@ -128,3 +129,9 @@ $screen-xxl-min: 1600px;
         transform: skewX(-15deg);
     }
 }
+
+@mixin colorize-shape($background-color) {
+    &:before {
+        background-color: $background-color;
+    }
+}
diff --git a/src/scss/components/_buttons.scss b/src/scss/components/_buttons.scss
index 42beab5..eb23074 100644
--- a/src/scss/components/_buttons.scss
+++ b/src/scss/components/_buttons.scss
@@ -12,7 +12,7 @@ $button_small: $lineheight_quarter;
 
 @mixin button($size) {
   @include button-layout($size);
-  @include button-style($size);
+  @include shape-style($size);
   @include button-hover();
   font-weight: $fontweight_base;
 }
@@ -50,22 +50,16 @@ $button_small: $lineheight_quarter;
   }
 }
 
-@mixin colorize-button($background-color) {
-    &:before {
-        background-color: $background-color;
-    }
-}
-
 @mixin button-fullcontrol($background-color, $hover-color, $text-color) {
-    @include colorize-button($background-color);
+    @include colorize-shape($background-color);
     color:$text-color;
     &:visited {
-      @include colorize-button($background-color);
+      @include colorize-shape($background-color);
       color:$text-color;
     }
     &, &:visited, &:not(.disabled):not(:disabled) {
         &:hover, &:active, &:focus, a:hover > &, a:active > &, a:focus > & {
-          @include colorize-button($hover-color);
+          @include colorize-shape($hover-color);
           color:lighten($text-color, 5%);
         }
     }
@@ -101,7 +95,7 @@ $button_small: $lineheight_quarter;
 }
 
 .menu-label {
-    @include button-style($button_small);
+    @include shape-style($button_small);
     @include button-hover();
     padding-left: $button_small;
     padding-right: $button_small;
diff --git a/src/scss/components/_cards.scss b/src/scss/components/_cards.scss
index e054ffe..efe87c6 100644
--- a/src/scss/components/_cards.scss
+++ b/src/scss/components/_cards.scss
@@ -50,7 +50,7 @@ $card-smallpad: $lineheight_half;
 
     width:85%;
 
-    @include button-style($size);
+    @include shape-style($size);
     border-radius:0;
     &:first-child {
       border-top-left-radius: $card-radius;
@@ -74,7 +74,7 @@ $card-smallpad: $lineheight_half;
 
 @mixin card-color($background-color) {
     & .card-header, & .menu-header {
-        @include colorize-button($background-color);
+        @include colorize-shape($background-color);
         color:getTextColorFromBackground($background-color);
     }
 }
@@ -125,7 +125,7 @@ $card-smallpad: $lineheight_half;
             text-overflow: ellipsis;
             overflow:hidden;
 
-            @include button-style($lineheight_half);
+            @include shape-style($lineheight_half);
             @include button-hover();
 
             strong {
@@ -143,7 +143,7 @@ $card-smallpad: $lineheight_half;
         }
 
         a, a:visited {
-          @include button-style($lineheight_half);
+          @include shape-style($lineheight_half);
           @include button-hover();
           @include button-fullcontrol(transparent, darken($color-background-alt, 7.5%), $color-primary);
         }
diff --git a/src/scss/components/_previews.scss b/src/scss/components/_previews.scss
index 9d4259d..10c49bd 100644
--- a/src/scss/components/_previews.scss
+++ b/src/scss/components/_previews.scss
@@ -92,7 +92,7 @@ $preview-height: 8*$lineheight;
       font-family: $basefont;
       font-size: 1rem;
       @include card-header($lineheight_half);
-      @include colorize-button($color-primary);
+      @include colorize-shape($color-primary);
       color:getTextColorFromBackground($color-primary);
       font-weight: $fontweight_big;
       margin-top:0px;