#layer {
    display: none; /* 初期表示は非表示 */
    position: absolute;
    left: 0px;
    top: 0px;
    width: 100%;
    height: 100%;
    background-color: black;
    opacity: 0.20;
}

#popup {
    display: none; /* 初期表示は非表示 */
    position: fixed;
    left: 50%;
    top: 50%;
    width: 600px;
    height: 550px;
    margin-left: -300px;
    margin-top: -250px;
    background-color: white;
    border-radius: 5px;
    text-align: center;
}

#done {
    display: none; /* 初期表示は非表示 */
    position: fixed;
    left: 50%;
    top: 50%;
    width: 600px;
    height: 500px;
    margin-left: -300px;
    margin-top: -250px;
    background-color: white;
    border-radius: 5px;
    text-align: center;
}