#btn_close {
    margin: 20px auto 0 auto;
    text-align: center;
    width: 90px;
    height: 52px;
    display: block;
    cursor: pointer;
    color: white;
    background-color: #1572b8;
    font-family: Open Sans, Tahoma, Arial, Verdana, sans-serif;
    font-size: 14pt;
    text-decoration: none;
    border: none;
}

    #btn_close:hover {
        color: rgb(255, 255, 255);
        background-color: #0d59a4;
    }

.popupText {
    font-family: Open Sans, Tahoma, Arial, Verdana, sans-serif;
    font-size: 14pt;
    background-color: rgb(238, 238, 238);
    text-align: center;
}