@media screen{img{-webkit-filter:grayscale(0%);-webkit-transition:.5s ease-in-out;-moz-filter:grayscale(0%);-moz-transition:.5s ease-in-out;-o-filter:grayscale(0%);-o-transition:.5s ease-in-out}img:hover{-webkit-filter:grayscale(100%);-webkit-transition:.5s ease-in-out;-moz-filter:grayscale(100%);-moz-transition:.5s ease-in-out;-o-filter:grayscale(100%);-o-transition:.5s ease-in-out}}