/* ========== Slider 4:3 ========== */

.bjap-main-gallery {
    width: 100%;
    max-width: 100%;
}

.bjap-main-gallery-large {
    position: relative;
    overflow: hidden;
    aspect-ratio: 4 / 3;
    width: 100%;
}

.bjap-main-gallery-large .bjap-main-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    position: absolute;
    inset: 0;
    transition: opacity 0.6s ease;
}

.bjap-main-gallery-large .bjap-main-image.is-active {
    opacity: 1;
    position: relative;
}

.bjap-main-gallery-thumbs {
    display: flex;
    gap: 6px;
    margin-top: 6px;
    width: 100%;
}

.bjap-main-gallery-thumbs .bjap-thumb {
    flex: 1;
    cursor: pointer;
    opacity: 0.5;
    transition: opacity 0.3s ease;
}

.bjap-main-gallery-thumbs .bjap-thumb img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
    display: block;
}

.bjap-main-gallery-thumbs .bjap-thumb.is-active {
    opacity: 1;
}

.bjap-main-gallery-thumbs .bjap-thumb:hover {
    opacity: 0.8;
}


/* ========== Grid 布局（Brief / Challenge / Approach 默认 1:1） ========== */

.bjap-gallery-grid {
    display: grid;
    gap: 16px;
}

.bjap-gallery-grid.cols-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.bjap-gallery-grid.cols-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.bjap-gallery-grid .bjap-gallery-item img {
    display: block;
    width: 100%;
    aspect-ratio: 1 / 1;
    object-fit: cover;
}


/* ========== Masonry 布局 + lazy fade-in ========== */

.bjap-gallery-masonry {
    column-count: 3;
    column-gap: 16px;
}

.bjap-gallery-masonry .bjap-gallery-item {
    break-inside: avoid;
    margin-bottom: 16px;
}

.bjap-gallery-masonry .bjap-gallery-item a {
    display: block;
}

.bjap-gallery-masonry .bjap-masonry-img {
    width: 100%;
    height: auto;
    display: block;
    cursor: zoom-in;
}

.bjap-gallery-masonry .bjap-masonry-img.bjap-masonry-init {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.bjap-gallery-masonry .bjap-masonry-img.bjap-masonry-visible {
    opacity: 1;
    transform: translateY(0);
}


/* ========== Lightbox ========== */

body.bjap-lightbox-open {
    overflow: hidden;
}

.bjap-lightbox {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: none;
}

.bjap-lightbox.is-open {
    display: block;
}

.bjap-lightbox-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.82);
}

.bjap-lightbox-inner {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
}

.bjap-lightbox-image {
    max-width: 92vw;
    max-height: 88vh;
    width: auto;
    height: auto;
    display: block;
    box-shadow: 0 10px 40px rgba(0,0,0,0.25);
}

.bjap-lightbox-close {
    position: absolute;
    top: 18px;
    right: 18px;
    width: 44px;
    height: 44px;
    border: none;
    background: rgba(255,255,255,0.12);
    color: #fff;
    font-size: 28px;
    line-height: 1;
    cursor: pointer;
    border-radius: 999px;
}

.bjap-lightbox-close:hover {
    background: rgba(255,255,255,0.2);
}


/* ========== Responsive ========== */

@media (max-width: 1024px) {
    .bjap-gallery-masonry {
        column-count: 2;
    }
}

@media (max-width: 768px) {
    .bjap-gallery-masonry {
        column-count: 1;
    }

    .bjap-lightbox-inner {
        padding: 20px;
    }
}