.safari {
	display:none; 
}

/* Safari 11+ */
@media not all and (min-resolution:.001dpcm)
{ @supports (-webkit-appearance:none) and (stroke-color:transparent) {
.safari {
	display:block; 
}
.webm-alpha{
	display: none;
}
}}
/* Test website on real Safari 11+ */

/* Safari 10.1 */
@media not all and (min-resolution:.001dpcm){ 
@supports (-webkit-appearance:none) and (not (stroke-color:transparent)) {
.safari { 
	display:block; 
}
.webm-alpha{
	display: none;
}
}}

/* Safari 6.1-10.0 (but not 10.1) */
@media screen and (min-color-index:0) and(-webkit-min-device-pixel-ratio:0){ 
@media {
.safari { 
	display:block; 
}
.webm-alpha{
	display: none;
}
}}