Update style.css

src/static/web/css/style.css

@@ -444,7 +444,7 @@ a:hover,.item-theme:hover,.item-news:hover,.table-hover tbody tr:hover {
 	box-shadow:0 0.125rem 0.25rem rgba(0,0,0,0.015)!important
 }
 .btn-send,#validateimg {
-	border-radius:0 var(--b-radius) var(--b-radius) 0;
+	border-radius:0 var(--b-radius) var(--b-radius) 0!important;
 	cursor:pointer
 }
 @media screen and (max-width:767px) {