engine/app/assets/stylesheets/locomotive/_buttons.scss

@import "compass/css3";
@import "compass/css3/border-radius";
@import "compass/css3/images";
@import "compass/css3/text-shadow";

@mixin black-button {
  display: inline-block;

  position: relative;

  cursor: pointer;

  border: 1px solid #000;
  @include border-radius(5px);

  line-height: 17px !important;

  padding: 5px 10px 7px 10px;

  @include background-image(linear-gradient(top, #474850, #1f2027));
  @include box-shadow(rgba(0, 0, 0, 0.3) 1px 1px 0px 0px);

  font-size: 12px;
  color: #fff;
  text-decoration: none;
  @include text-shadow(rgba(0, 0, 0, 0.8), 0px, 1px, 0px);

  &:hover {
    @include background-image(linear-gradient(top, #575862, #2f303b));
  }

  &:active {
    top: 1px;
  }
}

@mixin light-button {
  display: inline-block;

  font-family: "Lucida Grande";

  position: relative;
  cursor: pointer;
  line-height: 12px;

  padding: 8px 10px 10px 10px;

  border: 0px;
  border-top: 1px solid rgba(255, 255, 255, 0.6);
  @include border-radius(5px);
  @include background-image(linear-gradient(top, #ebedf4, #d2d6e1));
  @include box-shadow(rgba(0, 0, 0, 0.3) 1px 1px 0px 0px);

  font-size: 12px;
  color: #6B6D7A;
  text-decoration: none;
  @include text-shadow(rgba(255, 255, 255, 0.8), 0px, 1px, 0px);

  &:hover {
    @include background-image(linear-gradient(top, #fff, #d7dbe7));
  }

  &:active {
    top: 1px;
  }
}