#member-main {
    background-image: url('../../../img/top.jpg');
    background-size: cover; 
    background-position: center;
}
#title-group {
    color: black;
    text-align: center;
}
#title {
    font-size: 2em;
    font-weight: 900;
    /* margin-bottom: 20px; */
}

#button-area {
    bottom: 20px;
    left: 2.5%;
    position: absolute;    
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    width: 95%;
}

/* 横向き時のスタイル */
@media (orientation: landscape) {
    #button-area {
        /* bottom: 15px; */
        left: 30%;
        width: 40%;
    }
}