/sass/recipes/shadow/drop/_flying.scss

 1/**
 2 * Drop shadow flying
 3 *
 4 * @thanks Geoffrey Crofte @geoffrey_crofte
 5 * @link http://www.creativejuiz.fr/trytotry/css3-box-shadow-after-before/
 6 */
 7@mixin drop-shadow-flying(
 8    $box-shadow-radius: 30px,
 9    $color: #000,
10    $distance: 1em,
11    $height: 2px
12)
13{
14    position: relative;
15
16    &:before,
17    &:after
18    {
19        content: " ";
20        position: absolute;
21        z-index: -2;
22        bottom: -$distance;
23    }
24
25    &:after
26    {
27        left: 8%;
28        width: 84%;
29        height: $height;
30        background: rgba(#000, .3);
31        @include border-radius(#{50%} / #{1px});
32        @include box-shadow(0 $height $box-shadow-radius/2 rgba(#000, .2), 0 $height $box-shadow-radius rgba(#000, .15));
33    }
34}