// https://raw.github.com/imathis/fancy-buttons/master/lib/stylesheets/_fancy-gradient.sass
@mixin fancy-gradient($color1, $color2) {
  $top_shine: lighten($color1, 18);
  $bottom_glow: lighten($color2, 10);
  $top_middle: $color1;
  $middle: lighten($color2, 3);
  $bottom_middle: $color2;
  @include background-image(linear-gradient($top_shine, $top_middle 10%, $middle 50%, $bottom_middle 50%, $bottom_glow));
}
@mixin fancy-gradient-active($color1, $color2) {
  $top: lighten($color2, 6);
  $bottom: lighten($color2, 14);
  $top_middle: lighten($color2, 8);
  $middle: lighten($color2, 4);
  $bottom_middle: lighten($color2, 1);
  @include background-image(linear-gradient($top, $top_middle 30%, $middle 50%, $bottom_middle 50%, $bottom));
}
@mixin fancy-matte-gradient($color1, $color2) {
  @include background-image(linear-gradient($color1, $color2));
}
@mixin fancy-matte-gradient-active($color1, $color2) {
  $top: lighten($color2, 5);
  $bottom: lighten($color2, 15);
  $middle: lighten($color2, 8);
  @include background-image(linear-gradient($top, $middle 40%, $middle 85%, $bottom)); 
}
/* incase an inverted custom gradient isn't specified
@mixin custom-fancy-gradient-active($color1, $color2)
  @include custom-fancy-gradient($color1, $color2)
*/