faire un joli bouton formulaire en css

form input[type="submit"]
{
    border: #22bb44 1px solid;
    background-color: #aaffaa;
    width: 20%;
    -webkit-border-radius: 10px; 
    -moz-border-radius: 10px;
}
 
form input[type="submit"]:hover
{
    background-color: #00ff77; 
    cursor: pointer;
}