/* ダイアログ用 */
.comic-modal {
    display: none;
    position: fixed;
    z-index: 10001;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    /* モーダル中央寄せ */
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.comic-modal-image-wrapper {
    background: #fff;
    position: relative;
    max-width: 98vw;
    max-height: 88vh;
    overflow: hidden;
}

.comic-modal-image-wrapper img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    will-change: opacity;
}

#displayPage {
    opacity: 1;
    z-index: 10002;
}

#displayPageNext {
    opacity: 0;
    pointer-events: none;
    /* クロスフェード用に重ねる */
    position: absolute;
    top: 0;
    left: 0;
    transition: opacity 0.3s;
}

/* ページ番号 */
.page-indicator {
    color: #fff;
    margin-top: 10px;
    font-size: 16px;
}

.close-btn {
    position: absolute;
    top: 10px;
    right: 20px;
    font-size: 24px;
    color: #fff;
    cursor: pointer;
}

/* 操作ガイド */
.guide {
    position: absolute;
    bottom: 20%;
    color: #ffffff;
    font-size: 18px;
    background: rgba(0, 0, 0, 0.6);
    padding: 8px 12px;
    border-radius: 6px;
    opacity: 0;
    transition: opacity 1s;
}

.guide.show {
    opacity: 1;
    animation: fadeout 4s forwards;
}

@keyframes fadeout {
    0% {
        opacity: 1;
    }

    70% {
        opacity: 1;
    }

    100% {
        opacity: 0;
    }
}

/* サムネイル設定 */
.comic-thumbnail {
    padding: 8px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 16px;
}

.comic-thumbnail figure {
    margin: 0;
    text-align: center;
    background: #f9f9f9;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s ease;
    cursor: pointer;
}

.comic-thumbnail figure:hover {
    transform: translateY(-4px);
}

.comic-thumbnail img {
    width: 100%;
    height: auto;
    display: block;
}

.comic-thumbnail figcaption {
    font-size: 0.9rem;
    color: #333;
    padding: 6px 8px;
    background: #fff;
}