/* ============================================================
   share-card.css — 分享卡片组件
   覆盖：
     1) 首页精品分享卡片：.featured-grid + .featured-card
     2) 列表/搜索结果卡片：.shares-grid + .share-card
   依赖：site.css 中的 --primary-color / --border-color 等变量
   ============================================================ */

/* ---------- 1. 首页精品卡片 ---------- */
.featured-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(320px, 100%), 1fr));
    gap: calc(var(--spacing-unit) * 3);
}

.featured-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: calc(var(--spacing-unit) * 4);
    transition: border-color 0.15s;
    display: flex;
    flex-direction: column;
    min-height: 340px;
    overflow: hidden;
    box-sizing: border-box;
}

.featured-card:hover {
    border-color: var(--primary-color);
}

.featured-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: calc(var(--spacing-unit) * 2);
    color: var(--text-primary);
    line-height: 1.4;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    word-break: break-word;
    max-width: 100%;
}

.featured-desc {
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-secondary);
    flex: 1;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
}

.featured-meta {
    display: flex;
    gap: calc(var(--spacing-unit) * 3);
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: calc(var(--spacing-unit) * 3);
    padding-top: calc(var(--spacing-unit) * 2);
    border-top: 1px solid var(--border-color);
    margin-top: auto;
}

/* 精品卡片下方"立即查看"按钮（page-scoped：home/list 页才加载本文件，detail 页不会冲突） */
.featured-card .btn-download {
    display: block;
    width: 100%;
    padding: calc(var(--spacing-unit) * 2) calc(var(--spacing-unit) * 3);
    background: var(--primary-color);
    color: white;
    text-align: center;
    text-decoration: none;
    border-radius: var(--border-radius);
    font-size: 14px;
    font-weight: 600;
    transition: background 0.15s;
    box-sizing: border-box;
}

.featured-card .btn-download:hover {
    background: var(--primary-hover);
}

/* ---------- 2. 列表/搜索结果卡片 ---------- */
.shares-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: calc(var(--spacing-unit) * 3);
}

.share-card {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: calc(var(--spacing-unit) * 4);
    transition: all 0.2s;
    position: relative;
    display: flex;
    flex-direction: column;
}

.share-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(102, 126, 234, 0.15);
}

.share-card-icon {
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.share-card-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: calc(var(--spacing-unit) * 2);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    min-height: 50px;
}

.share-card-preview {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: calc(var(--spacing-unit) * 3);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
}

.share-card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: calc(var(--spacing-unit) * 3);
    padding-top: calc(var(--spacing-unit) * 2);
    border-top: 1px solid var(--border-color);
}

.share-card-link {
    display: block;
    text-align: center;
    padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 3);
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: var(--border-radius);
    font-size: 14px;
    font-weight: 600;
    transition: background 0.15s;
}

.share-card-link:hover {
    background: var(--primary-hover);
}

/* ---------- 响应式 ---------- */
@media (max-width: 768px) {
    .featured-grid {
        grid-template-columns: 1fr;
        gap: calc(var(--spacing-unit) * 2);
    }

    .featured-card {
        padding: calc(var(--spacing-unit) * 3);
    }

    .shares-grid {
        grid-template-columns: 1fr;
        gap: calc(var(--spacing-unit) * 2);
    }

    .share-card {
        padding: calc(var(--spacing-unit) * 3);
    }

    .share-card-title {
        font-size: 16px;
        min-height: auto;
    }
}