// Vendor Prefixes
 //
 // All vendor mixins are deprecated as of v3.2.0 due to the introduction of
 // Autoprefixer in our Gruntfile. They will be removed in v4.
 
 // - Animations
 // - Backface visibility
 // - Box shadow
 // - Box sizing
 // - Content columns
 // - Hyphens
 // - Placeholder text
 // - Transformations
 // - Transitions
 // - User Select
 
 
 // Animations
 .animation(@animation) {
   -webkit-animation: @animation;
        -o-animation: @animation;
           animation: @animation;
 }
 .animation-name(@name) {
   -webkit-animation-name: @name;
           animation-name: @name;
 }
 .animation-duration(@duration) {
   -webkit-animation-duration: @duration;
           animation-duration: @duration;
 }
 .animation-timing-function(@timing-function) {
   -webkit-animation-timing-function: @timing-function;
           animation-timing-function: @timing-function;
 }
 .animation-delay(@delay) {
   -webkit-animation-delay: @delay;
           animation-delay: @delay;
 }
 .animation-iteration-count(@iteration-count) {
   -webkit-animation-iteration-count: @iteration-count;
           animation-iteration-count: @iteration-count;
 }
 .animation-direction(@direction) {
   -webkit-animation-direction: @direction;
           animation-direction: @direction;
 }
 .animation-fill-mode(@fill-mode) {
   -webkit-animation-fill-mode: @fill-mode;
           animation-fill-mode: @fill-mode;
 }
 
 // Backface visibility
 // Prevent browsers from flickering when using CSS 3D transforms.
 // Default value is `visible`, but can be changed to `hidden`
 
 .backface-visibility(@visibility){
   -webkit-backface-visibility: @visibility;
      -moz-backface-visibility: @visibility;
           backface-visibility: @visibility;
 }
 
 // Drop shadows
 //
 // Note: Deprecated `.box-shadow()` as of v3.1.0 since all of Bootstrap's
 // supported browsers that have box shadow capabilities now support it.
 
 .box-shadow(@shadow) {
   -webkit-box-shadow: @shadow; // iOS <4.3 & Android <4.1
           box-shadow: @shadow;
 }
 
 // Box sizing
 .box-sizing(@boxmodel) {
   -webkit-box-sizing: @boxmodel;
      -moz-box-sizing: @boxmodel;
           box-sizing: @boxmodel;
 }
 
 // CSS3 Content Columns
 .content-columns(@column-count; @column-gap: @grid-gutter-width) {
   -webkit-column-count: @column-count;
      -moz-column-count: @column-count;
           column-count: @column-count;
   -webkit-column-gap: @column-gap;
      -moz-column-gap: @column-gap;
           column-gap: @column-gap;
 }
 
 // Optional hyphenation
 .hyphens(@mode: auto) {
   word-wrap: break-word;
   -webkit-hyphens: @mode;
      -moz-hyphens: @mode;
       -ms-hyphens: @mode; // IE10+
        -o-hyphens: @mode;
           hyphens: @mode;
 }
 
 // Placeholder text
 .placeholder(@color: @input-color-placeholder) {
   // Firefox
   &::-moz-placeholder {
     color: @color;
     opacity: 1; // Override Firefox's unusual default opacity; see https://github.com/twbs/bootstrap/pull/11526
   }
   &:-ms-input-placeholder { color: @color; } // Internet Explorer 10+
   &::-webkit-input-placeholder  { color: @color; } // Safari and Chrome
 }
 
 // Transformations
 .scale(@ratio) {
   -webkit-transform: scale(@ratio);
       -ms-transform: scale(@ratio); // IE9 only
        -o-transform: scale(@ratio);
           transform: scale(@ratio);
 }
 .scale(@ratioX; @ratioY) {
   -webkit-transform: scale(@ratioX, @ratioY);
       -ms-transform: scale(@ratioX, @ratioY); // IE9 only
        -o-transform: scale(@ratioX, @ratioY);
           transform: scale(@ratioX, @ratioY);
 }
 .scaleX(@ratio) {
   -webkit-transform: scaleX(@ratio);
       -ms-transform: scaleX(@ratio); // IE9 only
        -o-transform: scaleX(@ratio);
           transform: scaleX(@ratio);
 }
 .scaleY(@ratio) {
   -webkit-transform: scaleY(@ratio);
       -ms-transform: scaleY(@ratio); // IE9 only
        -o-transform: scaleY(@ratio);
           transform: scaleY(@ratio);
 }
 .skew(@x; @y) {
   -webkit-transform: skewX(@x) skewY(@y);
       -ms-transform: skewX(@x) skewY(@y); // See https://github.com/twbs/bootstrap/issues/4885; IE9+
        -o-transform: skewX(@x) skewY(@y);
           transform: skewX(@x) skewY(@y);
 }
 .translate(@x; @y) {
   -webkit-transform: translate(@x, @y);
       -ms-transform: translate(@x, @y); // IE9 only
        -o-transform: translate(@x, @y);
           transform: translate(@x, @y);
 }
 .translate3d(@x; @y; @z) {
   -webkit-transform: translate3d(@x, @y, @z);
           transform: translate3d(@x, @y, @z);
 }
 .rotate(@degrees) {
   -webkit-transform: rotate(@degrees);
       -ms-transform: rotate(@degrees); // IE9 only
        -o-transform: rotate(@degrees);
           transform: rotate(@degrees);
 }
 .rotateX(@degrees) {
   -webkit-transform: rotateX(@degrees);
       -ms-transform: rotateX(@degrees); // IE9 only
        -o-transform: rotateX(@degrees);
           transform: rotateX(@degrees);
 }
 .rotateY(@degrees) {
   -webkit-transform: rotateY(@degrees);
       -ms-transform: rotateY(@degrees); // IE9 only
        -o-transform: rotateY(@degrees);
           transform: rotateY(@degrees);
 }
 .perspective(@perspective) {
   -webkit-perspective: @perspective;
      -moz-perspective: @perspective;
           perspective: @perspective;
 }
 .perspective-origin(@perspective) {
   -webkit-perspective-origin: @perspective;
      -moz-perspective-origin: @perspective;
           perspective-origin: @perspective;
 }
 .transform-origin(@origin) {
   -webkit-transform-origin: @origin;
      -moz-transform-origin: @origin;
       -ms-transform-origin: @origin; // IE9 only
           transform-origin: @origin;
 }
 
 
 // Transitions
 
 .transition(@transition) {
   -webkit-transition: @transition;
        -o-transition: @transition;
           transition: @transition;
 }
 .transition-property(@transition-property) {
   -webkit-transition-property: @transition-property;
           transition-property: @transition-property;
 }
 .transition-delay(@transition-delay) {
   -webkit-transition-delay: @transition-delay;
           transition-delay: @transition-delay;
 }
 .transition-duration(@transition-duration) {
   -webkit-transition-duration: @transition-duration;
           transition-duration: @transition-duration;
 }
 .transition-timing-function(@timing-function) {
   -webkit-transition-timing-function: @timing-function;
           transition-timing-function: @timing-function;
 }
 .transition-transform(@transition) {
   -webkit-transition: -webkit-transform @transition;
      -moz-transition: -moz-transform @transition;
        -o-transition: -o-transform @transition;
           transition: transform @transition;
 }
 
 
 // User select
 // For selecting text on the page
 
 .user-select(@select) {
   -webkit-user-select: @select;
      -moz-user-select: @select;
       -ms-user-select: @select; // IE10+
           user-select: @select;
 }