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+// Image Mixins

+// - Responsive image

+// - Retina image

+

+

+// Responsive image

+//

+// Keep images from scaling beyond the width of their parents.

+.img-responsive(@display: block) {

+  display: @display;

+  max-width: 100%; // Part 1: Set a maximum relative to the parent

+  height: auto; // Part 2: Scale the height according to the width, otherwise you get stretching

+}

+

+

+// Retina image

+//

+// Short retina mixin for setting background-image and -size. Note that the

+// spelling of `min--moz-device-pixel-ratio` is intentional.

+.img-retina(@file-1x; @file-2x; @width-1x; @height-1x) {

+  background-image: url("@{file-1x}");

+

+  @media

+  only screen and (-webkit-min-device-pixel-ratio: 2),

+  only screen and (   min--moz-device-pixel-ratio: 2),

+  only screen and (     -o-min-device-pixel-ratio: 2/1),

+  only screen and (        min-device-pixel-ratio: 2),

+  only screen and (                min-resolution: 192dpi),

+  only screen and (                min-resolution: 2dppx) {

+    background-image: url("@{file-2x}");

+    background-size: @width-1x @height-1x;

+  }

+}