Drop: all vendor prefix mixins because autoprefixer

dist/css/bootstrap.css

@@ -260,11 +260,7 @@ th {
     border: 1px solid #ddd !important;
   }
 }
-* {
+*,
-  -webkit-box-sizing: border-box;
-     -moz-box-sizing: border-box;
-          box-sizing: border-box;
-}
 *:before,
 *:after {
   -webkit-box-sizing: border-box;
@@ -1731,17 +1727,19 @@ output {
 .form-control:focus {
   border-color: #66afe9;
   outline: 0;
-  -webkit-box-shadow: inset 0 1px 1px rgba(0,0,0,.075), 0 0 8px rgba(102, 175, 233, .6);
+  -webkit-box-shadow: inset 0 1px 1px rgba(0, 0, 0, .075), 0 0 8px rgba(102, 175, 233, .6);
-          box-shadow: inset 0 1px 1px rgba(0,0,0,.075), 0 0 8px rgba(102, 175, 233, .6);
+          box-shadow: inset 0 1px 1px rgba(0, 0, 0, .075), 0 0 8px rgba(102, 175, 233, .6);
+}
+.form-control::-webkit-input-placeholder {
+  color: #777;
 }
 .form-control::-moz-placeholder {
   color: #777;
-  opacity: 1;
 }
 .form-control:-ms-input-placeholder {
   color: #777;
 }
-.form-control::-webkit-input-placeholder {
+.form-control::placeholder {
   color: #777;
 }
 .form-control[disabled],
@@ -2151,7 +2149,6 @@ select[multiple].form-group-lg .form-control {
 fieldset[disabled] .btn {
   pointer-events: none;
   cursor: not-allowed;
-  filter: alpha(opacity=65);
   -webkit-box-shadow: none;
           box-shadow: none;
   opacity: .65;
@@ -4739,7 +4736,6 @@ a.list-group-item-danger.active:focus {
   line-height: 1;
   color: #000;
   text-shadow: 0 1px 0 #fff;
-  filter: alpha(opacity=20);
   opacity: .2;
 }
 .close:hover,
@@ -4747,7 +4743,6 @@ a.list-group-item-danger.active:focus {
   color: #000;
   text-decoration: none;
   cursor: pointer;
-  filter: alpha(opacity=50);
   opacity: .5;
 }
 button.close {
@@ -4773,11 +4768,12 @@ button.close {
   outline: 0;
 }
 .modal.fade .modal-dialog {
-  -webkit-transition: -webkit-transform .3s ease-out;
-       -o-transition:      -o-transform .3s ease-out;
-          transition:         transform .3s ease-out;
   -webkit-transform: translate3d(0, -25%, 0);
+  -webkit-transform: transition .3s ease-out;
+      -ms-transform: transition .3s ease-out;
+       -o-transform: transition .3s ease-out;
           transform: translate3d(0, -25%, 0);
+          transform: transition .3s ease-out;
 }
 .modal.in .modal-dialog {
   -webkit-transform: translate3d(0, 0, 0);
@@ -4814,11 +4810,9 @@ button.close {
   background-color: #000;
 }
 .modal-backdrop.fade {
-  filter: alpha(opacity=0);
   opacity: 0;
 }
 .modal-backdrop.in {
-  filter: alpha(opacity=50);
   opacity: .5;
 }
 .modal-header {
@@ -4884,11 +4878,9 @@ button.close {
   font-size: .85rem;
   line-height: 1.4;
   visibility: visible;
-  filter: alpha(opacity=0);
   opacity: 0;
 }
 .tooltip.in {
-  filter: alpha(opacity=90);
   opacity: .9;
 }
 .tooltip.top {

docs/dist/css/bootstrap.css

@@ -260,11 +260,7 @@ th {
     border: 1px solid #ddd !important;
   }
 }
-* {
+*,
-  -webkit-box-sizing: border-box;
-     -moz-box-sizing: border-box;
-          box-sizing: border-box;
-}
 *:before,
 *:after {
   -webkit-box-sizing: border-box;
@@ -1731,17 +1727,19 @@ output {
 .form-control:focus {
   border-color: #66afe9;
   outline: 0;
-  -webkit-box-shadow: inset 0 1px 1px rgba(0,0,0,.075), 0 0 8px rgba(102, 175, 233, .6);
+  -webkit-box-shadow: inset 0 1px 1px rgba(0, 0, 0, .075), 0 0 8px rgba(102, 175, 233, .6);
-          box-shadow: inset 0 1px 1px rgba(0,0,0,.075), 0 0 8px rgba(102, 175, 233, .6);
+          box-shadow: inset 0 1px 1px rgba(0, 0, 0, .075), 0 0 8px rgba(102, 175, 233, .6);
+}
+.form-control::-webkit-input-placeholder {
+  color: #777;
 }
 .form-control::-moz-placeholder {
   color: #777;
-  opacity: 1;
 }
 .form-control:-ms-input-placeholder {
   color: #777;
 }
-.form-control::-webkit-input-placeholder {
+.form-control::placeholder {
   color: #777;
 }
 .form-control[disabled],
@@ -2151,7 +2149,6 @@ select[multiple].form-group-lg .form-control {
 fieldset[disabled] .btn {
   pointer-events: none;
   cursor: not-allowed;
-  filter: alpha(opacity=65);
   -webkit-box-shadow: none;
           box-shadow: none;
   opacity: .65;
@@ -4739,7 +4736,6 @@ a.list-group-item-danger.active:focus {
   line-height: 1;
   color: #000;
   text-shadow: 0 1px 0 #fff;
-  filter: alpha(opacity=20);
   opacity: .2;
 }
 .close:hover,
@@ -4747,7 +4743,6 @@ a.list-group-item-danger.active:focus {
   color: #000;
   text-decoration: none;
   cursor: pointer;
-  filter: alpha(opacity=50);
   opacity: .5;
 }
 button.close {
@@ -4773,11 +4768,12 @@ button.close {
   outline: 0;
 }
 .modal.fade .modal-dialog {
-  -webkit-transition: -webkit-transform .3s ease-out;
-       -o-transition:      -o-transform .3s ease-out;
-          transition:         transform .3s ease-out;
   -webkit-transform: translate3d(0, -25%, 0);
+  -webkit-transform: transition .3s ease-out;
+      -ms-transform: transition .3s ease-out;
+       -o-transform: transition .3s ease-out;
           transform: translate3d(0, -25%, 0);
+          transform: transition .3s ease-out;
 }
 .modal.in .modal-dialog {
   -webkit-transform: translate3d(0, 0, 0);
@@ -4814,11 +4810,9 @@ button.close {
   background-color: #000;
 }
 .modal-backdrop.fade {
-  filter: alpha(opacity=0);
   opacity: 0;
 }
 .modal-backdrop.in {
-  filter: alpha(opacity=50);
   opacity: .5;
 }
 .modal-header {
@@ -4884,11 +4878,9 @@ button.close {
   font-size: .85rem;
   line-height: 1.4;
   visibility: visible;
-  filter: alpha(opacity=0);
   opacity: 0;
 }
 .tooltip.in {
-  filter: alpha(opacity=90);
   opacity: .9;
 }
 .tooltip.top {

less/button-groups.less

@@ -117,11 +117,11 @@
 // The clickable button for toggling the menu
 // Remove the gradient and set the same inset shadow as the :active state
 .btn-group.open .dropdown-toggle {
-  .box-shadow(inset 0 3px 5px rgba(0,0,0,.125));
+  box-shadow: inset 0 3px 5px rgba(0,0,0,.125);
 
   // Show no shadow for `.btn-link` since it has no other button styles.
   &.btn-link {
-    .box-shadow(none);
+    box-shadow: none;
   }
 }
 

less/buttons.less

@@ -18,7 +18,7 @@
   border: 1px solid transparent;
   white-space: nowrap;
   .button-size(@padding-base-vertical; @padding-base-horizontal; @font-size-base; @line-height-base; @border-radius-base);
-  .user-select(none);
+  user-select: none;
 
   &,
   &:active,
@@ -40,7 +40,7 @@
   &.active {
     outline: 0;
     background-image: none;
-    .box-shadow(inset 0 3px 5px rgba(0,0,0,.125));
+    box-shadow: inset 0 3px 5px rgba(0,0,0,.125);
   }
 
   &.disabled,
@@ -48,8 +48,8 @@
   fieldset[disabled] & {
     cursor: not-allowed;
     pointer-events: none; // Future-proof disabling of clicks
-    .opacity(.65);
+    opacity: .65;
-    .box-shadow(none);
+    box-shadow: none;
   }
 }
 
@@ -95,7 +95,7 @@
   &[disabled],
   fieldset[disabled] & {
     background-color: transparent;
-    .box-shadow(none);
+    box-shadow: none;
   }
   &,
   &:hover,

less/carousel.less

@@ -16,7 +16,7 @@
   > .item {
     display: none;
     position: relative;
-    .transition(.6s ease-in-out left);
+    transition: .6s ease-in-out left;
 
     // Account for jankitude on images
     > img,

less/close.less

@@ -10,14 +10,14 @@
   line-height: 1;
   color: @close-color;
   text-shadow: @close-text-shadow;
-  .opacity(.2);
+  opacity: .2;
 
   &:hover,
   &:focus {
     color: @close-color;
     text-decoration: none;
     cursor: pointer;
-    .opacity(.5);
+    opacity: .5;
   }
 
   // Additional properties for button version

less/component-animations.less

@@ -9,7 +9,7 @@
 
 .fade {
   opacity: 0;
-  .transition(opacity .15s linear);
+  transition: opacity .15s linear;
   &.in {
     opacity: 1;
   }
@@ -27,5 +27,5 @@
   position: relative;
   height: 0;
   overflow: hidden;
-  .transition(height .35s ease);
+  transition: height .35s ease;
 }

less/dropdowns.less

@@ -43,7 +43,7 @@
   border: 1px solid @dropdown-fallback-border; // IE8 fallback
   border: 1px solid @dropdown-border;
   border-radius: @border-radius-base;
-  .box-shadow(0 6px 12px rgba(0,0,0,.175));
+  box-shadow: 0 6px 12px rgba(0,0,0,.175);
   background-clip: padding-box;
 
   // Aligns the dropdown menu to right

less/forms.less

@@ -45,7 +45,7 @@ label {
 
 // Override content-box in Normalize (* isn't specific enough)
 input[type="search"] {
-  .box-sizing(border-box);
+  box-sizing: border-box;
 }
 
 // Position radios and checkboxes better
@@ -124,14 +124,16 @@ output {
   background-image: none; // Reset unusual Firefox-on-Android default style; see https://github.com/necolas/normalize.css/issues/214
   border: 1px solid @input-border;
   border-radius: @input-border-radius;
-  .box-shadow(inset 0 1px 1px rgba(0,0,0,.075));
+  box-shadow: inset 0 1px 1px rgba(0,0,0,.075);
-  .transition(~"border-color ease-in-out .15s, box-shadow ease-in-out .15s");
+  transition: border-color ease-in-out .15s, box-shadow ease-in-out .15s;
 
   // Customize the `:focus` state to imitate native WebKit styles.
   .form-control-focus();
 
   // Placeholder
-  .placeholder();
+  &::placeholder {
+    color: @input-color-placeholder;
+  }
 
   // Disabled and read-only inputs
   //

less/mixins.less

@@ -13,7 +13,6 @@
 @import "mixins/tab-focus.less";
 @import "mixins/text-emphasis.less";
 @import "mixins/text-overflow.less";
-@import "mixins/vendor-prefixes.less";
 
 // Components
 @import "mixins/alerts.less";

less/mixins/forms.less

@@ -20,11 +20,10 @@
   // 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
+    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: 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
@@ -57,7 +56,7 @@
   &:focus {
     border-color: @color;
     outline: 0;
-    .box-shadow(~"inset 0 1px 1px rgba(0,0,0,.075), 0 0 8px @{color-rgba}");
+    box-shadow: inset 0 1px 1px rgba(0,0,0,.075), 0 0 8px @color-rgba;
   }
 }
 

less/mixins/vendor-prefixes.less

@@ -1,224 +0,0 @@
-// 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) {
-  &::-moz-placeholder           { color: @color;   // Firefox
-                                  opacity: 1; } // 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;
-}

less/modals.less

@@ -30,10 +30,10 @@
 
   // When fading in the modal, animate it to slide down
   &.fade .modal-dialog {
-    .translate3d(0, -25%, 0);
+    transform: translate3d(0, -25%, 0);
-    .transition-transform(~"0.3s ease-out");
+    transform: transition .3s ease-out;
   }
-  &.in .modal-dialog { .translate3d(0, 0, 0) }
+  &.in .modal-dialog { transform: translate3d(0, 0, 0) }
 }
 .modal-open .modal {
   overflow-x: hidden;
@@ -54,7 +54,7 @@
   border: 1px solid @modal-content-fallback-border-color; //old browsers fallback (ie8 etc)
   border: 1px solid @modal-content-border-color;
   border-radius: @border-radius-large;
-  .box-shadow(0 3px 9px rgba(0,0,0,.5));
+  box-shadow: 0 3px 9px rgba(0,0,0,.5);
   background-clip: padding-box;
   // Remove focus outline from opened modal
   outline: 0;
@@ -70,8 +70,8 @@
   z-index: @zindex-modal-background;
   background-color: @modal-backdrop-bg;
   // Fade for backdrop
-  &.fade { .opacity(0); }
+  &.fade { opacity: 0; }
-  &.in { .opacity(@modal-backdrop-opacity); }
+  &.in { opacity: @modal-backdrop-opacity; }
 }
 
 // Modal header
@@ -138,7 +138,7 @@
     margin: 30px auto;
   }
   .modal-content {
-    .box-shadow(0 5px 15px rgba(0,0,0,.5));
+    box-shadow: 0 5px 15px rgba(0,0,0,.5);
   }
 
   // Modal sizes

less/navbar.less

@@ -141,7 +141,7 @@
   right: 0;
   left: 0;
   z-index: @zindex-navbar-fixed;
-  .translate3d(0, 0, 0);
+  transform: translate3d(0, 0, 0);
 
   // Undo the rounded corners
   @media (min-width: @grid-float-breakpoint) {
@@ -290,8 +290,7 @@
   padding: 10px @navbar-padding-horizontal;
   border-top: 1px solid transparent;
   border-bottom: 1px solid transparent;
-  @shadow: inset 0 1px 0 rgba(255,255,255,.1), 0 1px 0 rgba(255,255,255,.1);
+  box-shadow: inset 0 1px 0 rgba(255,255,255,.1), 0 1px 0 rgba(255,255,255,.1);
-  .box-shadow(@shadow);
 
   // Mixin behavior for optimum display
   .form-inline();
@@ -313,7 +312,7 @@
     margin-right: 0;
     padding-top: 0;
     padding-bottom: 0;
-    .box-shadow(none);
+    box-shadow: none;
   }
 }
 

less/panels.less

@@ -9,7 +9,7 @@
   background-color: @panel-bg;
   border: 1px solid transparent;
   border-radius: @panel-border-radius;
-  .box-shadow(0 1px 1px rgba(0,0,0,.05));
+  box-shadow: 0 1px 1px rgba(0,0,0,.05);
 }
 
 // Panel contents

less/popovers.less

@@ -17,7 +17,7 @@
   border: 1px solid @popover-fallback-border-color;
   border: 1px solid @popover-border-color;
   border-radius: @border-radius-large;
-  .box-shadow(0 5px 10px rgba(0,0,0,.2));
+  box-shadow: 0 5px 10px rgba(0,0,0,.2);
 
   // Overrides for proper insertion
   white-space: normal;

less/progress-bars.less

@@ -30,7 +30,7 @@
   margin-bottom: @line-height-computed;
   background-color: @progress-bg;
   border-radius: @border-radius-base;
-  .box-shadow(inset 0 1px 2px rgba(0,0,0,.1));
+  box-shadow: inset 0 1px 2px rgba(0,0,0,.1);
 }
 
 // Bar of progress
@@ -43,8 +43,8 @@
   color: @progress-bar-color;
   text-align: center;
   background-color: @progress-bar-bg;
-  .box-shadow(inset 0 -1px 0 rgba(0,0,0,.15));
+  box-shadow: inset 0 -1px 0 rgba(0,0,0,.15);
-  .transition(width .6s ease);
+  transition: width .6s ease;
 }
 
 // Striped bars
@@ -64,7 +64,7 @@
 // `.progress-bar.active` approach.
 .progress.active .progress-bar,
 .progress-bar.active {
-  .animation(progress-bar-stripes 2s linear infinite);
+  animation: progress-bar-stripes 2s linear infinite;
 }
 
 // Account for lower percentages

less/scaffolding.less

@@ -8,12 +8,10 @@
 // Heads up! This reset may cause conflicts with some third-party widgets.
 // For recommendations on resolving such conflicts, see
 // http://getbootstrap.com/getting-started/#third-box-sizing
-* {
+*,
-  .box-sizing(border-box);
-}
 *:before,
 *:after {
-  .box-sizing(border-box);
+  box-sizing: border-box;
 }
 
 
@@ -96,7 +94,7 @@ img {
   background-color: @thumbnail-bg;
   border: 1px solid @thumbnail-border;
   border-radius: @thumbnail-border-radius;
-  .transition(all .2s ease-in-out);
+  transition: all .2s ease-in-out;
 
   // Keep them at most 100% wide
   .img-responsive(inline-block);

less/theme.less

@@ -20,13 +20,12 @@
 .btn-warning,
 .btn-danger {
   text-shadow: 0 -1px 0 rgba(0,0,0,.2);
-  @shadow: inset 0 1px 0 rgba(255,255,255,.15), 0 1px 1px rgba(0,0,0,.075);
+  box-shadow: inset 0 1px 0 rgba(255,255,255,.15), 0 1px 1px rgba(0,0,0,.075);
-  .box-shadow(@shadow);
 
   // Reset the shadow
   &:active,
   &.active {
-    .box-shadow(inset 0 3px 5px rgba(0,0,0,.125));
+    box-shadow: inset 0 3px 5px rgba(0,0,0,.125);
   }
 }
 
@@ -81,7 +80,7 @@
 
 .thumbnail,
 .img-thumbnail {
-  .box-shadow(0 1px 2px rgba(0,0,0,.075));
+  box-shadow: 0 1px 2px rgba(0,0,0,.075);
 }
 
 
@@ -113,12 +112,11 @@
   #gradient > .vertical(@start-color: lighten(@navbar-default-bg, 10%); @end-color: @navbar-default-bg);
   .reset-filter(); // Remove gradient in IE<10 to fix bug where dropdowns don't get triggered
   border-radius: @navbar-border-radius;
-  @shadow: inset 0 1px 0 rgba(255,255,255,.15), 0 1px 5px rgba(0,0,0,.075);
+  box-shadow: inset 0 1px 0 rgba(255,255,255,.15), 0 1px 5px rgba(0,0,0,.075);
-  .box-shadow(@shadow);
 
   .navbar-nav > .active > a {
     #gradient > .vertical(@start-color: darken(@navbar-default-bg, 5%); @end-color: darken(@navbar-default-bg, 2%));
-    .box-shadow(inset 0 3px 9px rgba(0,0,0,.075));
+    box-shadow: inset 0 3px 9px rgba(0,0,0,.075);
   }
 }
 .navbar-brand,
@@ -133,7 +131,7 @@
 
   .navbar-nav > .active > a {
     #gradient > .vertical(@start-color: @navbar-inverse-bg; @end-color: lighten(@navbar-inverse-bg, 2.5%));
-    .box-shadow(inset 0 3px 9px rgba(0,0,0,.25));
+    box-shadow: inset 0 3px 9px rgba(0,0,0,.25);
   }
 
   .navbar-brand,
@@ -158,8 +156,7 @@
 // Common styles
 .alert {
   text-shadow: 0 1px 0 rgba(255,255,255,.2);
-  @shadow: inset 0 1px 0 rgba(255,255,255,.25), 0 1px 2px rgba(0,0,0,.05);
+  box-shadow: inset 0 1px 0 rgba(255,255,255,.25), 0 1px 2px rgba(0,0,0,.05);
-  .box-shadow(@shadow);
 }
 
 // Mixin for generating new styles
@@ -210,7 +207,7 @@
 
 .list-group {
   border-radius: @border-radius-base;
-  .box-shadow(0 1px 2px rgba(0,0,0,.075));
+  box-shadow: 0 1px 2px rgba(0,0,0,.075);
 }
 .list-group-item.active,
 .list-group-item.active:hover,
@@ -228,7 +225,7 @@
 
 // Common styles
 .panel {
-  .box-shadow(0 1px 2px rgba(0,0,0,.05));
+  box-shadow: 0 1px 2px rgba(0,0,0,.05);
 }
 
 // Mixin for generating new styles
@@ -253,6 +250,5 @@
 .well {
   #gradient > .vertical(@start-color: darken(@well-bg, 5%); @end-color: @well-bg);
   border-color: darken(@well-bg, 10%);
-  @shadow: inset 0 1px 3px rgba(0,0,0,.05), 0 1px 0 rgba(255,255,255,.1);
+  box-shadow: inset 0 1px 3px rgba(0,0,0,.05), 0 1px 0 rgba(255,255,255,.1);
-  .box-shadow(@shadow);
 }

less/thumbnails.less

@@ -12,7 +12,7 @@
   background-color: @thumbnail-bg;
   border: 1px solid @thumbnail-border;
   border-radius: @thumbnail-border-radius;
-  .transition(all .2s ease-in-out);
+  transition: all .2s ease-in-out;
 
   > img,
   a > img {

less/tooltip.less

@@ -11,9 +11,9 @@
   visibility: visible;
   font-size: @font-size-small;
   line-height: 1.4;
-  .opacity(0);
+  opacity: 0;
 
-  &.in     { .opacity(@tooltip-opacity); }
+  &.in     { opacity: @tooltip-opacity; }
   &.top    { margin-top:  -3px; padding: @tooltip-arrow-width 0; }
   &.right  { margin-left:  3px; padding: 0 @tooltip-arrow-width; }
   &.bottom { margin-top:   3px; padding: @tooltip-arrow-width 0; }

less/utilities.less

@@ -53,5 +53,5 @@
 
 .affix {
   position: fixed;
-  .translate3d(0, 0, 0);
+  transform: translate3d(0, 0, 0);
 }