.img-hover a img {
    -webkit-transition: all .3s ease; /* Safari and Chrome */
  	-moz-transition: all .3s ease; /* Firefox */
  	-o-transition: all .3s ease; /* IE 9 */
  	-ms-transition: all .3s ease; /* Opera */
  	transition: all .3s ease;
}
.img-hover img:hover {
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    -webkit-transform:translateZ(0) scale(1.20); /* Safari and Chrome */
    -moz-transform:scale(1.20); /* Firefox */
    -ms-transform:scale(1.20); /* IE 9 */
    -o-transform:translatZ(0) scale(1.20); /* Opera */
    transform:translatZ(0) scale(1.20);
}
  
  
.grayscale {
  -webkit-filter: brightness(1.10) grayscale(100%) contrast(90%);
  -moz-filter: brightness(1.10) grayscale(100%) contrast(90%);
  filter: brightness(1.10) grayscale(100%); 
}