/* ================================================== 
   ITEM BOXES 01 完全版（1〜15対応）
================================================== */

/* ---------- GRID 共通 ---------- */
.item_boxes_01__grid {
    display: grid;
    gap: var(--spacing-lg);
}

/* 3列グリッド (gallery_01〜gallery_05) */
.item_boxes_01__grid.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

/* 2列グリッド・中央寄せ (gallery_06〜gallery_10) */
.item_boxes_01__grid.grid-2 {
    grid-template-columns: repeat(2, 1fr);
    justify-content: center; /* 中央寄せ */
}

/* 1列グリッド・中央寄せ (gallery_11〜gallery_15) */
.item_boxes_01__grid.grid-1 {
    grid-template-columns: 1fr;
    justify-content: center; /* 中央寄せ */
}

/* ---------- レスポンシブ ---------- */
@media (max-width: 768px) {
    .item_boxes_01__grid.grid-3,
    .item_boxes_01__grid.grid-2,
    .item_boxes_01__grid.grid-1 {
        grid-template-columns: 1fr; /* タブレット以下は全て1列 */
        justify-content: center;
        gap: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .item_boxes_01__grid {
        gap: var(--spacing-sm);
    }
}

@media (max-width: 320px) {
    .item_boxes_01__grid {
        gap: var(--spacing-sm-sm);
    }
    .item_boxes_01__caption {
        font-size: var(--font-sm-sm);
        padding: var(--spacing-sm-sm) var(--spacing-md);
    }
    .item_boxes_01__item {
        border-radius: var(--radius-panel);
    }
}

/* ============================== 
   ITEM
============================== */
.item_boxes_01__item {
    border-radius: var(--radius-panel);
    overflow: hidden;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    position: relative;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    background-color: var(--color-bg-panel);
    box-shadow: var(--shadow-panel);
}

.item_boxes_01__item img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: var(--radius-panel);
    object-fit: cover;
    box-shadow: var(--shadow-panel);
    transition: transform 0.4s ease, box-shadow 0.4s ease, filter 0.4s ease;
    filter: brightness(1.02) contrast(1.02);
}

.item_boxes_01__item:hover img {
    transform: scale(1.05);
    box-shadow: var(--shadow-panel);
    filter: brightness(1.05) contrast(1.04);
}

/* ============================== 
   CAPTION
============================== */
.item_boxes_01__caption {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    max-height: 40px;
    background: rgba(255, 255, 255, 0.4);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-sm);
    color: var(--color-text-sub);
    text-align: center;
    opacity: 0;
    transform: translateY(100%) scaleY(0.85);
    transition: opacity 0.45s ease, transform 0.45s ease, background 0.45s ease, padding 0.45s ease;
    border-top: 1px solid var(--color-border);
    border-radius: 0 0 var(--radius-small) var(--radius-small);
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.5);
}

.item_boxes_01__item:hover .item_boxes_01__caption {
    opacity: 1;
    transform: translateY(0) scaleY(1);
    background: rgba(255, 255, 255, 0.55);
    padding: var(--spacing-sm) var(--spacing-md);
}

/* ============================== 
   比率対応
============================== */
.item_boxes_01.ratio-1-1 img { aspect-ratio: 1 / 1; }
.item_boxes_01.ratio-16-9 img { aspect-ratio: 16 / 9; }
.item_boxes_01.ratio-4-3 img { aspect-ratio: 4 / 3; }
.item_boxes_01.ratio-3-4 img { aspect-ratio: 3 / 4; }
.item_boxes_01.ratio-9-16 img { aspect-ratio: 9 / 16; }