Added margin and correct border radius

public/sass/components/_alerts.scss

@@ -7,13 +7,13 @@
 
 .alert {
   padding: 1.25rem 2rem 1.25rem 1.5rem;
-  margin-bottom: $line-height-base;
+  margin-bottom: $panel-margin / 2;
   text-shadow: 0 2px 0 rgba(255, 255, 255, 0.5);
   background: $alert-error-bg;
   position: relative;
   color: $white;
   text-shadow: 0 1px 0 rgba(0, 0, 0, 0.2);
-  border-radius: 2px;
+  border-radius: $border-radius;
   display: flex;
   flex-direction: row;
 }