.btn {
    background: #6d757a;
    background-image: -webkit-linear-gradient(top, #6d757a, #43494d);
    background-image: -moz-linear-gradient(top, #6d757a, #43494d);
    background-image: -ms-linear-gradient(top, #6d757a, #43494d);
    background-image: -o-linear-gradient(top, #6d757a, #43494d);
    background-image: linear-gradient(to bottom, #6d757a, #43494d);
    -webkit-border-radius: 28;
    -moz-border-radius: 28;
    border-radius: 28px;
    font-family: Arial;
    color: #ffffff;
    font-size: 20px;
    padding: 10px 20px 10px 20px;
    text-decoration: none;
}

.btn:hover {
    background: #424242;
    background-image: -webkit-linear-gradient(top, #424242, #141414);
    background-image: -moz-linear-gradient(top, #424242, #141414);
    background-image: -ms-linear-gradient(top, #424242, #141414);
    background-image: -o-linear-gradient(top, #424242, #141414);
    background-image: linear-gradient(to bottom, #424242, #141414);
    text-decoration: none;
}