img{-webkit-filter: grayscale(30%);-webkit-transition: opacity 0.9s linear; -webkit-transition: 0.9s linear; -moz-transition: all 0.9s linear;
transition: all 0.9s linear; opacity: 1.0;}
img:hover{-webkit-filter: grayscale(0%);-webkit-transition: opacity 0.9s linear; -webkit-transition: 0.9s linear; -moz-transition: all 0.9s linear;
transition: all 0.9s linear; opacity: 1.0;}