Progress bars!

index.less

@@ -3,7 +3,7 @@
 @import 'stylesheets/text';
 @import 'stylesheets/git';
 @import 'stylesheets/sites';
-@import 'stylesheets/loading';
+@import 'stylesheets/progress';
 @import 'stylesheets/buttons';
 @import 'stylesheets/panels';
 @import 'stylesheets/panes';

stylesheets/loading.less

@@ -1,28 +0,0 @@
-@import "ui-variables";
-@import "ui-mixins";
-
-.loading-spinner(@size) {
-  width: @size;
-  height: @size;
-  display: block;
-
-  background-image: url(images/octocat-spinner-128.gif);
-  background-repeat: no-repeat;
-  background-size: cover;
-
-  &.inline-block {
-    display: inline-block;
-  }
-}
-
-.loading-spinner-medium {
-  .loading-spinner(64px);
-}
-
-.loading-spinner-small {
-  .loading-spinner(32px);
-}
-
-.loading-spinner-tiny {
-  .loading-spinner(16px);
-}

stylesheets/progress.less

@@ -0,0 +1,76 @@
+@import "ui-variables";
+@import "ui-mixins";
+
+.loading-spinner(@size) {
+  width: @size;
+  height: @size;
+  display: block;
+
+  background-image: url(images/octocat-spinner-128.gif);
+  background-repeat: no-repeat;
+  background-size: cover;
+
+  &.inline-block {
+    display: inline-block;
+  }
+}
+
+.loading-spinner-large {
+  .loading-spinner(64px);
+}
+
+.loading-spinner-medium {
+  .loading-spinner(50px);
+}
+
+.loading-spinner-small {
+  .loading-spinner(32px);
+}
+
+.loading-spinner-tiny {
+  .loading-spinner(20px);
+}
+
+// Much learning from:
+// http://css-tricks.com/html5-progress-element/
+
+@progress-height: 16px;
+@progress-shine-gradient: -webkit-linear-gradient(top, rgba(255, 255, 255, .15), rgba(0, 0, 0, .15));
+
+progress {
+  height: @progress-height;
+  -webkit-appearance: none;
+}
+
+progress::-webkit-progress-bar {
+  height: @progress-height;
+  border-radius: @component-border-radius;
+
+  background-color: #666;
+
+  background-image:
+	   -webkit-linear-gradient(-30deg,
+	                           transparent 33%, rgba(0, 0, 0, .1) 33%,
+	                           rgba(0,0, 0, .1) 66%, transparent 66%),
+	   @progress-shine-gradient;
+
+  border-radius: 2px;
+  background-size: 25px @progress-height, 100% 100%, 100% 100%;
+  -webkit-animation: animate-stripes 5s linear infinite;
+  animation: animate-stripes 5s linear infinite;
+}
+
+progress::-webkit-progress-value {
+  border-radius: @component-border-radius;
+  background-image: @progress-shine-gradient;
+  background-color: @background-color-success;
+}
+
+progress[value]::-webkit-progress-bar {
+  background-image: @progress-shine-gradient;
+  animation: none;
+}
+
+@-webkit-keyframes animate-stripes {
+   100% { background-position: 100px 0px; }
+}