#contents_viewer_back {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: none;
    justify-content: center;
    align-items: center;
    box-sizing: border-box;
    background: rgba(0, 0, 0, 0.7);
}

#contents_viewer_back.active {
    display: flex;
}


/* ポップアップ本体 */
#contents_viewer {
    padding-top: 24px;
    padding-left: var(--side-decoration-width);
    padding-right: var(--side-decoration-width);
    position: relative;
    width: min(700px, 95vw);
    max-height: 90vh;
    overflow-y: auto;
    background: white;
    border-radius: 18px;
    box-shadow: 0px 20px 60px rgba(0, 0, 0, 0.3);
    animation: ContentsOpen 0.2s ease-out;
}


#contents_viewer_image_container {
    width: 100%;
    background: #f3f3f3;
    display: flex;
    justify-content: center;
    align-items: center;
}

#contents_viewer_image_container img{
    display: block;
    width: 100%;
    max-height: 65vh;
    object-fit: contain;
}


/* コンテンツ */
#contents_viewer_text {
    padding: 24px;
    padding-top: 0px;
    color: #5a5959;
}



#contents_viewer_text p {
    margin: 0;
    line-height: 1.7;
}


#contents_tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 18px;
}

.contents_tag {
    padding: 5px 11px;
    border-radius: 999px;
    background: #eef7f1;
    color: #689779;
    font-size: 13px;
}


/* 開くアニメーション */
@keyframes ContentsOpen {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}



@media (max-width: 600px) {
    #contents_viewer_back {
        padding: 10px;
        align-items: center;
    }
    #contents_viewer {
        width: 100%;
        max-height: 92vh;
        border-radius: 15px;
    }
    #contents_viewer_image_container img {
        max-height: 60vh;
    }
    #contents_viewer_text {
        padding: 18px;
    }
    #contents_viewer_text h2 {
        font-size: 20px;
    }
}