diff --git a/style.less b/style.less
index a9c38ca..d729f21 100755
--- a/style.less
+++ b/style.less
@@ -68,7 +68,9 @@ main {
 
 a, a:visited {
 	text-decoration: underline;
-	transition: color 0.1s linear;
+  transition-property: color, border-color;
+  transition-duration: 0.1s;
+  transition-timing-function: linear;
 
   @media @light {
     color: @darkColor;
@@ -86,7 +88,8 @@ a, a:visited {
 }
 
 .bouton {
-	border: 2px solid grey;
+	border-width: 2px;
+  border-style: solid;
 	padding: 10px;
 	padding-left: 15px;
 	padding-right: 15px;
@@ -95,6 +98,13 @@ a, a:visited {
 	border-radius: 14px;
 	text-decoration: none;
 
+  @media @light {
+    border-color: @darkColor;
+  }
+  @media @dark {
+    border-color: @lightColor;
+  }
+
 	&:hover {
 		color: @mainColor;
 		border: 2px solid @mainColor;
@@ -103,7 +113,8 @@ a, a:visited {
 }
 
 .petit-bouton {
-	border: 2px solid grey;
+  border-width: 2px;
+  border-style: solid;
 	padding: 2px;
 	padding-left: 10px;
 	padding-right: 10px;
@@ -113,6 +124,13 @@ a, a:visited {
 	border-radius: 14px;
 	text-decoration: none;
 
+  @media @light {
+    border-color: @darkColor;
+  }
+  @media @dark {
+    border-color: @lightColor;
+  }
+
 	&:hover {
 		color: @mainColor;
 		border: 2px solid @mainColor;