//
 // Buttons
 // --------------------------------------------------
 
 
 // Base styles
 // --------------------------------------------------
 
 .btn {
   display: inline-block;
   margin-bottom: 0; // For input.btn
   font-weight: @btn-font-weight;
   text-align: center;
   vertical-align: middle;
   touch-action: manipulation;
   cursor: pointer;
   background-image: none; // Reset unusual Firefox-on-Android default style; see https://github.com/necolas/normalize.css/issues/214
   border: 1px solid transparent;
   white-space: nowrap;
   .button-size(@padding-base-vertical; @padding-base-horizontal; @font-size-base; @line-height-base; @btn-border-radius-base);
   .user-select(none);
 
   &,
   &:active,
   &.active {
     &:focus,
     &.focus {
       .tab-focus();
     }
   }
 
   &:hover,
   &:focus,
   &.focus {
     color: @btn-default-color;
     text-decoration: none;
   }
 
   &:active,
   &.active {
     outline: 0;
     background-image: none;
     .box-shadow(inset 0 3px 5px rgba(0,0,0,.125));
   }
 
   &.disabled,
   &[disabled],
   fieldset[disabled] & {
     cursor: @cursor-disabled;
     .opacity(.65);
     .box-shadow(none);
   }
 
   a& {
     &.disabled,
     fieldset[disabled] & {
       pointer-events: none; // Future-proof disabling of clicks on `<a>` elements
     }
   }
 }
 
 
 // Alternate buttons
 // --------------------------------------------------
 
 .btn-default {
   .button-variant(@btn-default-color; @btn-default-bg; @btn-default-border);
 }
 .btn-primary {
   .button-variant(@btn-primary-color; @btn-primary-bg; @btn-primary-border);
 }
 // Success appears as green
 .btn-success {
   .button-variant(@btn-success-color; @btn-success-bg; @btn-success-border);
 }
 // Info appears as blue-green
 .btn-info {
   .button-variant(@btn-info-color; @btn-info-bg; @btn-info-border);
 }
 // Warning appears as orange
 .btn-warning {
   .button-variant(@btn-warning-color; @btn-warning-bg; @btn-warning-border);
 }
 // Danger and error appear as red
 .btn-danger {
   .button-variant(@btn-danger-color; @btn-danger-bg; @btn-danger-border);
 }
 
 
 // Link buttons
 // -------------------------
 
 // Make a button look and behave like a link
 .btn-link {
   color: @link-color;
   font-weight: normal;
   border-radius: 0;
 
   &,
   &:active,
   &.active,
   &[disabled],
   fieldset[disabled] & {
     background-color: transparent;
     .box-shadow(none);
   }
   &,
   &:hover,
   &:focus,
   &:active {
     border-color: transparent;
   }
   &:hover,
   &:focus {
     color: @link-hover-color;
     text-decoration: @link-hover-decoration;
     background-color: transparent;
   }
   &[disabled],
   fieldset[disabled] & {
     &:hover,
     &:focus {
       color: @btn-link-disabled-color;
       text-decoration: none;
     }
   }
 }
 
 
 // Button Sizes
 // --------------------------------------------------
 
 .btn-lg {
   // line-height: ensure even-numbered height of button next to large input
   .button-size(@padding-large-vertical; @padding-large-horizontal; @font-size-large; @line-height-large; @btn-border-radius-large);
 }
 .btn-sm {
   // line-height: ensure proper height of button next to small input
   .button-size(@padding-small-vertical; @padding-small-horizontal; @font-size-small; @line-height-small; @btn-border-radius-small);
 }
 .btn-xs {
   .button-size(@padding-xs-vertical; @padding-xs-horizontal; @font-size-small; @line-height-small; @btn-border-radius-small);
 }
 
 
 // Block button
 // --------------------------------------------------
 
 .btn-block {
   display: block;
   width: 100%;
 }
 
 // Vertically space out multiple block buttons
 .btn-block + .btn-block {
   margin-top: 5px;
 }
 
 // Specificity overrides
 input[type="submit"],
 input[type="reset"],
 input[type="button"] {
   &.btn-block {
     width: 100%;
   }
 }