chill-bundles/stylesheets/sass/mixins/_buttons.scss

@mixin button($button-background-color, $button-text-color) {
   color: $button-text-color; 
   background: $button-background-color;
   border: medium none;
   box-shadow: none;
   padding: $button-padding;
   text-decoration: none;
   text-align: center;
   display: inline-block;
   vertical-align: middle;
   white-space: nowrap;
   line-height: normal;
   border-radius: 2px;

   &:hover,
   &:active {
      background: darken($button-background-color, 5%);
      color: $button-text-color;  // force text color for anchor tags
      text-decoration: none;      // remove underline on anchor tags
   }

   &:focus {
      background: darken($button-background-color, 5%);
   }

   &[disabled] {
      background: transparentize($button-background-color,0.4);
      color: darken($button-background-color, 10%);
      &:hover {
         box-shadow: none;
      }
   }
}