Remove vendor prefixes - handled by autoprefixer.

src/styles/components/_audiolevel.scss

@@ -29,11 +29,7 @@
   z-index: 6;
   .audio-level {
     background: #9dd53a; /* Old browsers */
-    background: -moz-linear-gradient(top, #9dd53a 0%, #a1d54f 50%, #80c217 51%, #7cbc0a 100%); /* FF3.6+ */
-    background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#9dd53a), color-stop(50%,#a1d54f), color-stop(51%,#80c217), color-stop(100%,#7cbc0a)); /* Chrome,Safari4+ */
-    background: -webkit-linear-gradient(top, #9dd53a 0%,#a1d54f 50%,#80c217 51%,#7cbc0a 100%); /* Chrome10+,Safari5.1+ */
-    background: -o-linear-gradient(top, #9dd53a 0%,#a1d54f 50%,#80c217 51%,#7cbc0a 100%); /* Opera 11.10+ */
-    background: -ms-linear-gradient(top, #9dd53a 0%,#a1d54f 50%,#80c217 51%,#7cbc0a 100%); /* IE10+ */
+    background: gradient(linear, left top, left bottom, color-stop(0%,#9dd53a), color-stop(50%,#a1d54f), color-stop(51%,#80c217), color-stop(100%,#7cbc0a)); /* Chrome,Safari4+ */
     background: linear-gradient(to bottom, #9dd53a 0%,#a1d54f 50%,#80c217 51%,#7cbc0a 100%); /* W3C */
     height: 4px;
     position: absolute;
@@ -41,7 +37,7 @@
     left: 0;
     right: 0;
     width: 0;
-    @include border-radius(0 0 2px 2px);
-    @include transition(width 0.05s ease-in-out);
+    border-radius: 0 0 2px 2px;
+    transition: width 0.05s ease-in-out;
   }
 }

src/styles/components/_bar.scss

@@ -29,21 +29,19 @@
 }
 
 .bar {
-  // without height bar jumps and disappears on reload
-  // use em to scale with text.
-  height: #{$minbarheight/$base-font-size}em;
   background-color: $componentbg;
+  box-shadow: 0 2px 10px 0 $componentfg3;
   color: $componentfg1;
   font: bold 1em/40px $font-sans-serif;
+  // without height bar jumps and disappears on reload, use em to scale with text.
+  height: #{$minbarheight/$base-font-size}em;
   text-align: center;
-  // @include adjust-leading-to(2);
-  @include box-shadow(0 2px 10px 0 $componentfg3);
+  touch-callout: none;
+  user-select: none;
   // @include debug-vertical-alignment();
-  @include touch-callout(none);
-  @include user-select(none);
   @include breakpt($breakpoint-medium) {
     z-index: 40;
-    @include box-shadow(none);
+    box-shadow: none;
   }
   .btn {
     position: relative;
@@ -66,7 +64,6 @@
     text-align: left;
     width: 90px;
     vertical-align: middle;
-    // @include adjust-font-size-to(11px,0.4);
     span {
       font-style: italic;
       left: 38px;
@@ -166,11 +163,10 @@
     padding: 0;
     text-align: center;
     width: 42px;
-    // @include adjust-font-size-to(24px);
     &:focus {
       border: none;
       outline: none;
-      @include box-shadow(0);
+      box-shadow: 0;
     }
     &:hover {
       background-color: none;

src/styles/global/_animations.scss

@@ -28,7 +28,7 @@
   &.ng-hide-add {
     opacity: 1;
     display: block !important;
-    @include transition(all linear 0.5s);
+    transition: all linear 0.5s;
     &.ng-hide-add-active {
       opacity: 0;
     }
@@ -36,7 +36,7 @@
   &.ng-hide-remove {
     opacity: 0;
     display: block !important;
-    @include transition(all linear 0.5s);
+    transition: all linear 0.5s;
     &.ng-hide-remove-active {
       opacity: 1;
     }

src/styles/global/_base.scss

@@ -25,7 +25,6 @@ body {
   background-color: $background;
   height: 100%;
   font: normal $base-font-size $font-sans-serif;
-  // @include debug-vertical-alignment();
 }
 
 body {
@@ -101,8 +100,8 @@ a {
   right: 15%;
   top: 15%;
   z-index: 20000;
-  @include transition-property(opacity);
-  @include transition-duration(.5s);
+  transition-property: opacity;
+  transition-duration: .5s;
   div {
     color: $lighter-text;
     display: block;
@@ -125,7 +124,7 @@ a {
   position: absolute;
   right: 0;
   top: 44px;
-  @include user-select(none);
+  user-select: none;
 }
 
 .welcome {

src/styles/global/_mixins.scss

@@ -4,13 +4,3 @@
     @content;
   }
 }
-
-@mixin linear-gradient($gradient...) {
-  background: #9dd53a; /* Old browsers */
-  background: linear-gradient(to bottom, #9dd53a 0%,#a1d54f 50%,#80c217 51%,#7cbc0a 100%); /* W3C */
-  background: -o-linear-gradient(top, #9dd53a 0%,#a1d54f 50%,#80c217 51%,#7cbc0a 100%); /* Opera 11.10+ */
-  background: -ms-linear-gradient(top, #9dd53a 0%,#a1d54f 50%,#80c217 51%,#7cbc0a 100%); /* IE10+ */
-  background: -moz-linear-gradient(top, #9dd53a 0%, #a1d54f 50%, #80c217 51%, #7cbc0a 100%); /* FF3.6+ */
-  background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#9dd53a), color-stop(50%,#a1d54f), color-stop(51%,#80c217), color-stop(100%,#7cbc0a)); /* Chrome,Safari4+ */
-  background: -webkit-linear-gradient(top, #9dd53a 0%,#a1d54f 50%,#80c217 51%,#7cbc0a 100%); /* Chrome10+,Safari5.1+ */
-}

src/styles/global/_overlaybar.scss

@@ -27,7 +27,7 @@
   position: absolute;
   text-shadow: 0 0 5px black;
   vertical-align: middle;
-  @include user-select(none);
+  user-select: none;
 }
 
 .overlaybar {