.grid-eyecatch-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    grid-gap: 10px;
}

/* layout属性が指定されている場合の通常グリッドレイアウト */
.grid-eyecatch-list:not(.grid-masonry)[data-layout] {
    grid-template-columns: repeat(var(--grid-columns-desktop, 4), 1fr);
}

/* Masonryレイアウト用スタイル */
.grid-eyecatch-list.grid-masonry {
    display: block;
    column-count: var(--masonry-columns-desktop, 4);
    column-gap: 10px;
}

.grid-eyecatch-list.grid-masonry .grid-eyecatch-item {
    display: inline-block;
    width: 100%;
    margin-bottom: 10px;
    break-inside: avoid;
    page-break-inside: avoid;
    overflow: hidden;
}

.grid-eyecatch-list.grid-masonry .grid-eyecatch-item img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.3s ease;
}

.grid-eyecatch-list.grid-masonry .grid-eyecatch-item:hover img {
    transform: scale(1.1);
}

/* Gutenberg 等: 直接子が .grid-eyecatch-item 以外（wp-block-*, figure, div 等）の Masonry マス */
.grid-eyecatch-list.grid-masonry > * {
    display: inline-block;
    width: 100%;
    margin-bottom: 10px;
    break-inside: avoid;
    page-break-inside: avoid;
    overflow: hidden;
}

.grid-eyecatch-list.grid-masonry > * img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.3s ease;
}

.grid-eyecatch-list.grid-masonry > *:hover img {
    transform: scale(1.1);
}

/* レスポンシブ対応 */
@media (max-width: 1200px) {
    .grid-eyecatch-list.grid-masonry {
        column-count: var(--masonry-columns-tablet, 3);
    }
    
    .grid-eyecatch-list:not(.grid-masonry)[data-layout] {
        grid-template-columns: repeat(var(--grid-columns-tablet, 3), 1fr);
    }
}

@media (max-width: 768px) {
    .grid-eyecatch-list.grid-masonry {
        column-count: var(--masonry-columns-mobile, 2);
    }
    
    .grid-eyecatch-list:not(.grid-masonry)[data-layout] {
        grid-template-columns: repeat(var(--grid-columns-mobile, 2), 1fr);
    }
}

@media (max-width: 480px) {
    .grid-eyecatch-list.grid-masonry {
        column-count: var(--masonry-columns-small, 1);
    }
    
    .grid-eyecatch-list:not(.grid-masonry)[data-layout] {
        grid-template-columns: repeat(var(--grid-columns-small, 1), 1fr);
    }
}

.grid-eyecatch-item {
    cursor: pointer;
    text-decoration: none;
    display: block;
    overflow: hidden;
}

.grid-eyecatch-item img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.3s ease;
}

.grid-eyecatch-item:hover img {
    transform: scale(1.1);
}

.grid-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    z-index: 1000;
}

.grid-overlay-image {
    display: block;
    max-width: 90%;
    max-height: 90%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

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

/* 矢印ナビゲーションボタン（masonry="0" overlay="1" の時のみ表示） */
.grid-overlay-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background-color: rgba(0, 0, 0, 0.5);
    border: none;
    color: #fff;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.3s ease, transform 0.3s ease;
    z-index: 1001;
    padding: 0;
}

.grid-overlay-nav:hover {
    background-color: rgba(0, 0, 0, 0.8);
    transform: translateY(-50%) scale(1.1);
}

.grid-overlay-nav:active {
    transform: translateY(-50%) scale(0.95);
}

.grid-overlay-nav svg {
    width: 24px;
    height: 24px;
    stroke: #fff;
}

.grid-overlay-nav-prev {
    left: 20px;
}

.grid-overlay-nav-next {
    right: 20px;
}

/* モバイル対応 */
@media (max-width: 768px) {
    .grid-overlay-nav {
        width: 40px;
        height: 40px;
    }
    
    .grid-overlay-nav svg {
        width: 20px;
        height: 20px;
    }
    
    .grid-overlay-nav-prev {
        left: 10px;
    }
    
    .grid-overlay-nav-next {
        right: 10px;
    }
}

/* 続きを読み込むボタン */
.grid-load-more-wrapper {
    text-align: center;
    margin: 30px 0;
    padding: 20px 0;
}

.grid-load-more-btn {
    display: inline-block;
    padding: 12px 30px;
    background-color: #0073aa;
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease;
    text-decoration: none;
}

.grid-load-more-btn:hover {
    background-color: #005a87;
    transform: translateY(-2px);
}

.grid-load-more-btn:active {
    transform: translateY(0);
}

.grid-load-more-btn:disabled {
    background-color: #ccc;
    cursor: not-allowed;
    transform: none;
}