.checkin_btn_top {
    width: 250px;
    height: 66px;
    background-image: url(/Legacy/images/kitayo_button/kitayo_button_PC.png);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    border: solid 3px white;
    border-radius: 6px;
    color: #fff;
    margin-left: 15px;
    position: relative;
}

.checkedin {
    display: none;
}

.checkedin_btn_top {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: relative;
    border-radius: 6px;
    color: #fff;
    background-color: rgba(153, 153, 153, 1);
    width: 250px;
    height: 66px;
    background-image: url(/Legacy/images/kitayo_button/kitayo.png);
    background-size: 50%;
    background-repeat: no-repeat;
    background-position: center;
    border: solid 3px white;
    margin-left: 15px;
    top: 2px;
}

#overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 999;
    opacity: 0;
    transition: opacity 0.5s ease;
}

/* ポップアップ */
#popup-message {
    text-align: center;
    font-size: 20px;
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    width: 80%;
    max-width: 600px;
    transform: translate(-50%, -50%);
    background-color: #fff;
    padding: 40px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.5);
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.5s ease;
}

@media screen and (max-width: 1200px) {

    .checkedin_btn_top,
    .checkin_btn_top {
        width: 200px;
        margin-left: 20px;
    }
}

@media screen and (max-width: 1000px) {

    .checkedin_btn_top,
    .checkin_btn_top {
        width: 195px;
        margin-left: 10px;
    }
}

@media screen and (max-width: 840px) {

    .checkin,
    .checkedin {
        padding-top: 35px;
        text-align: center;
        margin-left: 200px;
    }
}

@media screen and (max-width: 640px) {
    .checkin {
        padding-top: 117px;
    }
}

@media screen and (max-width: 450px) {

    .checkin_btn_top,
    .checkedin_btn_top {
        width: 150px;
    }

    .checkin_btn_top {
        background-image: url(/Legacy/images/kitayo_button/kitayo_button_SP.png);
    }

    .checkin {
        margin-left: 160px;
    }
}