/**
 * Custom Product Gallery — 样式
 * 所有选择器以 .cpg- 为前缀，避免与主题冲突
 */

/* ─── 外层容器 ─── */
.cpg-gallery-wrapper {
    position: relative;
    width: 100%;
    max-width: 600px;
    margin: 0 auto 20px;
    box-sizing: border-box;
}

/* ─── 主图 Swiper ─── */
.cpg-main-slider {
    width: 100%;
    overflow: hidden;
    border-radius: 4px;
    background: #f8f8f8;
}

/* 固定主图容器宽高比，不同比例图片居中显示 */
.cpg-main-slider .swiper-slide {
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f8f8f8;
    aspect-ratio: 1 / 1;
    overflow: hidden;
}

.cpg-main-slider .swiper-slide a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    line-height: 0;
}

.cpg-main-image {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    display: block;
    object-fit: contain;
    transition: opacity 0.3s ease;
}

/* 主图箭头 */
.cpg-main-slider .swiper-button-next,
.cpg-main-slider .swiper-button-prev {
    color: #333;
    background: rgba(255, 255, 255, 0.85);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    transition: background 0.2s ease, opacity 0.2s ease;
    opacity: 0;
}

.cpg-main-slider .swiper-button-next::after,
.cpg-main-slider .swiper-button-prev::after {
    font-size: 16px;
    font-weight: bold;
}

.cpg-gallery-wrapper:hover .cpg-main-slider .swiper-button-next,
.cpg-gallery-wrapper:hover .cpg-main-slider .swiper-button-prev {
    opacity: 1;
}

.cpg-main-slider .swiper-button-next:hover,
.cpg-main-slider .swiper-button-prev:hover {
    background: rgba(255, 255, 255, 1);
}

/* ─── 缩略图 Swiper ─── */
.cpg-thumb-slider {
    width: 100%;
    margin-top: 10px;
    overflow: hidden;
    box-sizing: border-box;
}

/*
 * 关键：Swiper 初始化前的预布局
 * 使用 CSS Grid 预先排列缩略图，防止 JS 加载前显示异常
 */
.cpg-thumb-slider:not(.swiper-initialized) .swiper-wrapper {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 10px;
}

.cpg-thumb-slider:not(.swiper-initialized) .swiper-slide {
    width: auto !important;
    margin: 0 !important;
}

/* 响应式预布局 */
@media (max-width: 768px) {
    .cpg-thumb-slider:not(.swiper-initialized) .swiper-wrapper {
        grid-template-columns: repeat(4, 1fr);
        gap: 8px;
    }
}

@media (max-width: 480px) {
    .cpg-thumb-slider:not(.swiper-initialized) .swiper-wrapper {
        grid-template-columns: repeat(3, 1fr);
        gap: 6px;
    }
}

/* Swiper 初始化后的正常样式 */
.cpg-thumb-slider .swiper-slide {
    cursor: pointer;
    opacity: 0.5;
    border: 2px solid transparent;
    border-radius: 4px;
    overflow: hidden;
    transition: opacity 0.25s ease, border-color 0.25s ease;
    box-sizing: border-box;
}

.cpg-thumb-slider .swiper-slide-thumb-active {
    opacity: 1;
    border-color: #333;
}

.cpg-thumb-slider .swiper-slide:hover {
    opacity: 0.85;
}

.cpg-thumb-image {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
    aspect-ratio: 1 / 1;
}

/* ─── Lightbox 链接样式重置 ─── */
.cpg-lightbox-link {
    text-decoration: none;
    outline: none;
}

/* ─── 响应式 ─── */
@media (max-width: 768px) {
    .cpg-gallery-wrapper {
        max-width: 100%;
    }

    .cpg-main-slider .swiper-button-next,
    .cpg-main-slider .swiper-button-prev {
        width: 32px;
        height: 32px;
        opacity: 0.7;
    }

    .cpg-main-slider .swiper-button-next::after,
    .cpg-main-slider .swiper-button-prev::after {
        font-size: 13px;
    }
}

@media (max-width: 480px) {
    .cpg-gallery-wrapper {
        margin-bottom: 15px;
    }
}

/* ─── 分页点（备用） ─── */
.cpg-pagination {
    display: none;
    text-align: center;
    margin-top: 8px;
}

.cpg-pagination .swiper-pagination-bullet {
    width: 8px;
    height: 8px;
    background: #999;
    opacity: 0.5;
}

.cpg-pagination .swiper-pagination-bullet-active {
    background: #333;
    opacity: 1;
}

/* ─── RTL 支持 ─── */
[dir="rtl"] .cpg-main-slider .swiper-button-next {
    right: auto;
    left: 10px;
}

[dir="rtl"] .cpg-main-slider .swiper-button-prev {
    left: auto;
    right: 10px;
}

/* ─── 垂直缩略图布局扩展预留 ─── */
.cpg-gallery-wrapper.cpg-layout-vertical {
    display: flex;
    flex-direction: row;
    gap: 10px;
}

.cpg-layout-vertical .cpg-thumb-slider {
    width: 80px;
    margin-top: 0;
    order: -1;
    flex-shrink: 0;
}

.cpg-layout-vertical .cpg-main-slider {
    flex: 1;
}