@-webkit-keyframes titleAnimation { from { font-size:20px; } to { font-size:50px; } }
@-moz-keyframes titleAnimation { from { font-size:20px; } to { font-size:50px; } }
@keyframes titleAnimation { from { font-size:20px; } to { font-size:50px; } }

.grow  {
    -webkit-animation:titleAnimation ease-in 1;
    -moz-animation:titleAnimation ease-in 1;
    animation:titleAnimation ease-in 1;

    -webkit-animation-fill-mode:forwards;
    -moz-animation-fill-mode:forwards;
    animation-fill-mode:forwards;

    -webkit-animation-duration:3s;
    -moz-animation-duration:3s;
    animation-duration:3s;
}