// Alerts
 
 .alert-variant(@background; @border; @text-color) {
   background-color: @background;
   border-color: @border;
   color: @text-color;
 
   hr {
     border-top-color: darken(@border, 5%);
   }
   .alert-link {
     color: darken(@text-color, 10%);
   }
 }