#overlay{
    width: 100%;
    height:100%;
    text-align: center;
    position: fixed;
    top: 0;
    /*z-index: 1;*/
    background: rgba(0,0,0,0.7);
    display: none;
}

#text_box {
    width: 70%;
    height: 80%;
    margin: auto;
    text-align: center;
    background: #fff;
    padding: 40px;
    box-sizing: border-box;
    position: absolute;
    top: 30%;
    left: 50%;
    -webkit-transform: translate(-50%, -30%);
    transform: translate(-50%, -30%);
    overflow:scroll;
}

#text_box p {
    font-size: 16px;
    text-align: justify;
    line-height: 2;
}

#text_box #notice{
    font-weight: bold;
    font-size: 32px;
    line-height:1.5;
    margin-bottom: 20px;
}

#text_box .btn_close {
    display: block;
    width: 200px;
    border: 1px solid #333;
    border-radius: 3px;
    margin: auto;
    padding: 15px 0;
    color: #333;
    font-size: 19.2px;
    margin-top: 60px;
    text-decoration: none;
    transition: 0.3s;
}
#text_box .btn_close:hover {
    background: #333;
    color: #fff;
}

/** comment out 
a.btn_open {
    width: 400px;
    height: 200px;
    display: block;
    background: #333;
    margin: auto;
    color: #fff;
    line-height: 200px;
}
*/