/* ==========================================================================
   InstaGallery — Frontend
   最小限のグリッドレイアウトのみ。装飾はテーマ側で。
   ========================================================================== */

.ig-feed {
    display: grid;
    gap: 4px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.ig-feed--col-1 { grid-template-columns: 1fr; }
.ig-feed--col-2 { grid-template-columns: repeat(2, 1fr); }
.ig-feed--col-3 { grid-template-columns: repeat(3, 1fr); }
.ig-feed--col-4 { grid-template-columns: repeat(4, 1fr); }
.ig-feed--col-5 { grid-template-columns: repeat(5, 1fr); }
.ig-feed--col-6 { grid-template-columns: repeat(6, 1fr); }

/* スマホ用カラム数（600px以下で適用） */
@media (max-width: 600px) {
    .ig-feed--col-sp-1 { grid-template-columns: 1fr; }
    .ig-feed--col-sp-2 { grid-template-columns: repeat(2, 1fr); }
    .ig-feed--col-sp-3 { grid-template-columns: repeat(3, 1fr); }
    .ig-feed--col-sp-4 { grid-template-columns: repeat(4, 1fr); }
    .ig-feed--col-sp-5 { grid-template-columns: repeat(5, 1fr); }
    .ig-feed--col-sp-6 { grid-template-columns: repeat(6, 1fr); }
}

.ig-feed__item {
    display: block;
    position: relative;
    overflow: hidden;
    aspect-ratio: 1 / 1;
}

.ig-feed--ratio-3x4 .ig-feed__item {
    aspect-ratio: 3 / 4;
}

/* フェードアップアニメーション */
.ig-feed__item.ig-animate {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.ig-feed__item.ig-animate.is-visible {
    opacity: 1;
    transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
    .ig-feed__item.ig-animate {
        opacity: 1;
        transform: none;
        transition: none;
    }
}

.ig-feed__item img,
.ig-feed__item video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.ig-feed__empty {
    text-align: center;
}

/* ホバーオーバーレイ */
.ig-feed__overlay {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 8px;
    background: linear-gradient(transparent 40%, rgba(0, 0, 0, 0.6));
    opacity: 0;
    transition: opacity 0.3s ease;
    color: #fff;
    text-decoration: none;
}

.ig-feed__item:hover .ig-feed__overlay {
    opacity: 1;
}

.ig-feed__overlay-likes {
    font-size: 14px;
    font-weight: bold;
}

.ig-feed__overlay-caption {
    font-size: 12px;
    line-height: 1.4;
    margin: 4px 0 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* スマホ: いいね数のみ常時表示、キャプション非表示 */
@media (max-width: 600px) {
    .ig-feed__overlay {
        opacity: 1;
        background: linear-gradient(transparent 60%, rgba(0, 0, 0, 0.5));
    }

    .ig-feed__overlay-caption {
        display: none;
    }
}

.ig-feed__item-wrap {
    display: contents;
}

.ig-feed__loadmore {
    text-align: center;
    margin: 16px 0;
}

.ig-feed__loadmore-btn {
    cursor: pointer;
}

/* ==========================================================================
   Lightbox — 最小限のスタイル
   ========================================================================== */

.ig-lightbox {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 99999;
    align-items: center;
    justify-content: center;
}

.ig-lightbox.is-active {
    display: flex;
}

.ig-lightbox__overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
}

.ig-lightbox__content {
    position: relative;
    max-width: 90vw;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.ig-lightbox__content img,
.ig-lightbox__content video {
    max-width: 100%;
    max-height: 80vh;
    object-fit: contain;
    display: block;
}

.ig-lightbox__caption {
    color: #fff;
    margin: 8px 0 0;
    font-size: 14px;
    text-align: center;
    max-width: 100%;
    word-break: break-word;
}

.ig-lightbox__link {
    color: #ccc;
    font-size: 12px;
    margin-top: 4px;
}

.ig-lightbox__close {
    position: absolute;
    top: -40px;
    right: 0;
    background: none;
    border: none;
    color: #fff;
    font-size: 32px;
    cursor: pointer;
    line-height: 1;
    padding: 0;
}

.ig-lightbox__prev,
.ig-lightbox__next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: #fff;
    font-size: 48px;
    cursor: pointer;
    padding: 0 12px;
    line-height: 1;
}

.ig-lightbox__prev { left: -60px; }
.ig-lightbox__next { right: -60px; }

@media (max-width: 600px) {
    .ig-lightbox__prev { left: 4px; }
    .ig-lightbox__next { right: 4px; }
    .ig-lightbox__prev,
    .ig-lightbox__next {
        font-size: 32px;
    }
}