// Form validation states
 //
 // Used in forms.less to generate the form validation CSS for warnings, errors,
 // and successes.
 
 .form-control-validation(@text-color: #555; @border-color: #ccc; @background-color: #f5f5f5) {
   // Color the label and help text
   .help-block,
   .control-label,
   .radio,
   .checkbox,
   .radio-inline,
   .checkbox-inline,
   &.radio label,
   &.checkbox label,
   &.radio-inline label,
   &.checkbox-inline label  {
     color: @text-color;
   }
   // Set the border and box shadow on specific inputs to match
   .form-control {
     border-color: @border-color;
     .box-shadow(inset 0 1px 1px rgba(0,0,0,.075)); // Redeclare so transitions work
     &:focus {
       border-color: darken(@border-color, 10%);
       @shadow: inset 0 1px 1px rgba(0,0,0,.075), 0 0 6px lighten(@border-color, 20%);
       .box-shadow(@shadow);
     }
   }
   // Set validation states also for addons
   .input-group-addon {
     color: @text-color;
     border-color: @border-color;
     background-color: @background-color;
   }
   // Optional feedback icon
   .form-control-feedback {
     color: @text-color;
   }
 }
 
 
 // Form control focus state
 //
 // Generate a customized focus state and for any input with the specified color,
 // which defaults to the `@input-border-focus` variable.
 //
 // We highly encourage you to not customize the default value, but instead use
 // this to tweak colors on an as-needed basis. This aesthetic change is based on
 // WebKit's default styles, but applicable to a wider range of browsers. Its
 // usability and accessibility should be taken into account with any change.
 //
 // Example usage: change the default blue border and shadow to white for better
 // contrast against a dark gray background.
 .form-control-focus(@color: @input-border-focus) {
   @color-rgba: rgba(red(@color), green(@color), blue(@color), .6);
   &:focus {
     border-color: @color;
     outline: 0;
     .box-shadow(~"inset 0 1px 1px rgba(0,0,0,.075), 0 0 8px @{color-rgba}");
   }
 }
 
 // Form control sizing
 //
 // Relative text size, padding, and border-radii changes for form controls. For
 // horizontal sizing, wrap controls in the predefined grid classes. `<select>`
 // element gets special love because it's special, and that's a fact!
 .input-size(@input-height; @padding-vertical; @padding-horizontal; @font-size; @line-height; @border-radius) {
   height: @input-height;
   padding: @padding-vertical @padding-horizontal;
   font-size: @font-size;
   line-height: @line-height;
   border-radius: @border-radius;
 
   select& {
     height: @input-height;
     line-height: @input-height;
   }
 
   textarea&,
   select[multiple]& {
     height: auto;
   }
 }