.btn {
    background: white;
    border-color: black;
    border-width: 1px;
    border-style: solid;
    -webkit-border-radius: 28;
    -moz-border-radius: 28;
    border-radius: 28px;
    color: black;
    font-size: 12px;
    padding: 5px 10px 5px 10px;
    text-decoration: none;
    outline: none;
}

    .btn[disabled] {
        color: lightgray;
        border-color: lightgray;
    }

    .btn:not([disabled]):hover {
        border-color: #5B92E5;
        border-width: 1px;
        border-style: solid;
        background-image: -webkit-linear-gradient(top, #5B92E5, #006aff);
        background-image: -moz-linear-gradient(top, #5B92E5, #006aff);
        background-image: -ms-linear-gradient(top, #5B92E5, #006aff);
        background-image: -o-linear-gradient(top, #5B92E5, #006aff);
        background-image: linear-gradient(to bottom, #5B92E5, #006aff);
        text-decoration: none;
        color: #ffffff;
        cursor: pointer;
    }