/* bevel size, left offset and color settings next 3 lines */ 
.rounded { 

    background-color: #99CCCC;
    padding: 13px 22px;
    border-radius: 30px;
}

.rounded:hover {
    background-color: #006666;
    animation: colorChangeTile 150ms;

}

@keyframes colorChangeTile {
    from {
        background-color: #99CCCC;
    }
    to   {
        background-color: #006666;
    }
}