.css_custom_title_and_content {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    /* text-align: center; */
    margin-top: 8px;
    /* position: fixed;
    top: 55%;
    left: 50%; */
    /* bring your own prefixes */
    /* transform: translate(-50%, -50%); */
}

.css_content {
    background-color: white;
    /* padding: 10px; */
    /* header&コンテンツの左端右端を合わせるための100% */
    width: fit-content;
    /* margin-left:40%; */
    /* success messageの横幅に合わせるため スマホなら380pxくらい */
    /* max-width: 1500px; */
    /* display:flex; */
}