// Panels
 
 .panel-variant(@border; @heading-text-color; @heading-bg-color; @heading-border) {
   border-color: @border;
 
   & > .panel-heading {
     color: @heading-text-color;
     background-color: @heading-bg-color;
     border-color: @heading-border;
 
     + .panel-collapse > .panel-body {
       border-top-color: @border;
     }
     .badge {
       color: @heading-bg-color;
       background-color: @heading-text-color;
     }
   }
   & > .panel-footer {
     + .panel-collapse > .panel-body {
       border-bottom-color: @border;
     }
   }
 }