.modal {
    /*position: absolute;*/
    position: fixed;
    display: none;

    justify-content: center;
    top: 0;
    left: 0;

    width: 100%;
    height: 100%;

    background-color: rgba(0, 0, 0, 0.4);
}

.modal_body {
    position: absolute;
    top: 50%;


    width: 400px;
    height: 600px;

    padding: 40px;

    text-align: center;

    background-color: rgb(255, 255, 255);
    border-radius: 10px;
    box-shadow: 0 2px 3px 0 rgba(34, 36, 38, 0.15);

    transform: translateY(-50%);
}

.modal .btn-close {
    position: absolute;
    top: 0;
    left: 0;
    margin: 10px; /* 필요에 따라 여백 조정 */
}