Here's a good link: https://css-tricks.com/almanac/properties/b/box-shadow/
.shadow {
-webkit-box-shadow: 0 1px 7px 0 rgba(0, 0, 0, 0.12); /* Safari 3-4, iOS 4.0.2 - 4.2, Android 2.3+ */
-moz-box-shadow: 0 1px 7px 0 rgba(0, 0, 0, 0.12); /* Firefox 3.5 - 3.6 */
box-shadow: 0 1px 7px 0 rgba(0, 0, 0, 0.12); /* Opera 10.5, IE 9, Firefox 4+, Chrome 6+, iOS 5 */
}
Update:
You can see the actual browser support and known issues here:
https://caniuse.com/#feat=css-boxshadow
Update2:
You can check this thread also - it may contain relevant info to you regarding the safari problem (color, sizes, etc.). The 0.12
may be a to small shadow for safari, according to the 1st answer.
css box shadow property is not working in safari