/* 博客页面样式 - Lobsters 风格 */

/* 博客英雄区域 */
.blog-hero {
    padding: 116px 0 56px;
    background:
        linear-gradient(135deg, rgba(37, 99, 235, 0.96), rgba(15, 118, 110, 0.94)),
        var(--primary-color);
    border-bottom: 1px solid var(--border-color);
    color: white;
}

.blog-hero-content {
    text-align: center;
}

.blog-title {
    font-size: clamp(2.4rem, 5vw, 4rem);
    font-weight: 800;
    margin-bottom: 1rem;
    color: white;
    letter-spacing: 0;
}

.blog-description {
    font-size: 1.16rem;
    color: rgba(255, 255, 255, 0.86);
    max-width: 760px;
    margin: 0 auto;
    line-height: 1.75;
}

.blog-freshness {
    max-width: 820px;
    margin: 1.2rem auto 0;
    padding: 0.8rem 1rem;
    border: 1px solid rgba(255, 255, 255, 0.22);
    border-radius: 8px;
    background: rgba(15, 23, 42, 0.18);
    color: rgba(255, 255, 255, 0.84);
    font-size: 0.9rem;
    line-height: 1.7;
}

.blog-kicker {
    display: inline-flex;
    align-items: center;
    min-height: 32px;
    padding: 0.25rem 0.85rem;
    margin-bottom: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 999px;
    color: rgba(255, 255, 255, 0.88);
    font-weight: 700;
    font-size: 0.86rem;
}

/* 博客列表区域 */
.blog-list {
    padding: 40px 0;
    background: var(--bg-primary);
}

/* 筛选和排序 */
.blog-filters {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 2px solid var(--border-color);
}

.category-briefs {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
    margin: 0 0 2rem;
}

.category-brief {
    min-height: 168px;
    padding: 1.1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: linear-gradient(180deg, #ffffff, #f8fafc);
    box-shadow: var(--shadow-sm);
}

.category-brief h2 {
    margin: 0.85rem 0 0.55rem;
    color: var(--text-primary);
    font-size: 1.05rem;
    line-height: 1.35;
}

.category-brief p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.65;
}

.filter-group {
    display: flex;
    gap: 0.5rem;
}

.filter-btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
    color: var(--text-secondary);
    border-radius: 4px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 150ms ease;
}

.filter-btn:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-color: var(--primary-color);
}

.filter-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.sort-group {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.sort-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.sort-select {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.9rem;
    cursor: pointer;
}

.sort-select:focus {
    outline: 2px solid var(--primary-color);
    border-color: var(--primary-color);
}

/* 文章卡片 */
.articles {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.article-card {
    display: flex;
    gap: 1rem;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--bg-primary);
    transition: all 150ms ease;
    cursor: pointer;
}

.article-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    transform: translateX(2px);
}

.article-card.featured {
    border-left: 3px solid var(--primary-color);
}

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

/* 文章内容 */
.article-content {
    flex: 1;
    min-width: 0;
}

.article-header {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.article-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.4;
}

.article-title:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

.article-category {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.category-technical {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
}

.category-product {
    background: rgba(14, 165, 233, 0.1);
    color: var(--secondary-color);
}

.category-tutorial {
    background: rgba(139, 92, 246, 0.1);
    color: var(--accent-color);
}

.category-news {
    background: rgba(236, 72, 153, 0.1);
    color: #ec4899;
}

.article-excerpt {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.article-source {
    margin: -0.35rem 0 1rem;
    color: var(--text-muted);
    font-size: 0.86rem;
    line-height: 1.6;
}

.article-source a {
    color: var(--primary-color);
    font-weight: 700;
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-color);
    flex-wrap: wrap;
}

.article-author {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary-color);
    text-decoration: none;
}

.article-author:hover {
    text-decoration: underline;
}

.article-date {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.article-comments,
.article-note {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.article-comments:hover,
.article-note:hover {
    color: var(--primary-color);
}

.article-tags {
    display: flex;
    gap: 0.5rem;
    margin-left: auto;
    flex-wrap: wrap;
}

.article-tags .tag {
    padding: 0.25rem 0.75rem;
    background: var(--bg-secondary);
    border-radius: 3px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-decoration: none;
}

.article-tags .tag:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

/* 相关文章 */
.related-posts {
    padding: 60px 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-top: 2rem;
}

.related-card {
    display: flex;
    padding: 1.5rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    transition: all 150ms ease;
    text-decoration: none;
    color: inherit;
}

.related-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.related-content h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.related-content h3:hover {
    color: var(--primary-color);
}

.related-excerpt {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    line-height: 1.5;
}

.related-meta {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* 分页 */
.blog-pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.page-btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
    color: var(--text-primary);
    border-radius: 4px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 150ms ease;
    min-width: 36px;
    text-align: center;
}

.page-btn:hover:not(:disabled) {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.page-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.page-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.page-ellipsis {
    padding: 0.5rem;
    color: var(--text-muted);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .blog-hero {
        padding: 96px 0 44px;
    }
    
    .blog-title {
        font-size: 2rem;
    }
    
    .blog-filters {
        flex-direction: column;
        gap: 1rem;
    }
    
    .filter-group {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .article-card {
        flex-direction: column;
        cursor: default;
    }

    .article-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .article-tags {
        margin-left: 0;
    }
    
    .related-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .blog-title {
        font-size: 1.75rem;
    }
    
    .filter-btn {
        padding: 0.4rem 0.75rem;
        font-size: 0.85rem;
    }
    
    .article-title {
        font-size: 1rem;
    }
}

/* 深色主题支持 */
[data-theme="dark"] {
    .article-card {
        background: var(--bg-secondary);
    }
    
    .filter-btn {
        background: var(--bg-secondary);
    }
    
    .sort-select {
        background: var(--bg-secondary);
    }
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.article-card {
    animation: fadeInUp 0.4s ease-out;
}

.article-card:nth-child(2) {
    animation-delay: 0.1s;
}

.article-card:nth-child(3) {
    animation-delay: 0.2s;
}

.article-card:nth-child(4) {
    animation-delay: 0.3s;
}

.article-card:nth-child(5) {
    animation-delay: 0.4s;
}

.article-card:nth-child(6) {
    animation-delay: 0.5s;
}

/* ─────────── P2 #14: 博客侧边目录 TOC ─────────── */

.blog-layout {
    display: grid;
    grid-template-columns: 1fr 240px;
    gap: 2rem;
    align-items: start;
}

.articles-wrap {
    min-width: 0;  /* 防 grid 子项被内容撑爆 */
}

.blog-toc {
    position: sticky;
    top: 100px;  /* 留出 header 高度 */
    max-height: calc(100vh - 120px);
    overflow-y: auto;
}

.blog-toc-inner {
    background: var(--bg-secondary, #f8fafc);
    border: 1px solid var(--border-color, #e2e8f0);
    border-radius: 0.75rem;
    padding: 1.25rem 1rem;
}

.blog-toc-title {
    font-size: 0.95rem;
    font-weight: 600;
    margin: 0 0 0.75rem;
    color: var(--text-primary, #0f172a);
}

.blog-toc-nav ol {
    list-style: none;
    padding: 0;
    margin: 0;
    counter-reset: toc-counter;
}

.blog-toc-nav li {
    counter-increment: toc-counter;
    margin: 0.25rem 0;
}

.blog-toc-nav a {
    display: block;
    padding: 0.4rem 0.5rem;
    color: var(--text-secondary, #64748b);
    text-decoration: none;
    font-size: 0.83rem;
    line-height: 1.4;
    border-radius: 0.4rem;
    transition: background 0.15s, color 0.15s;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.blog-toc-nav a::before {
    content: counter(toc-counter) ". ";
    color: var(--primary-color, #6366f1);
    font-weight: 600;
}

.blog-toc-nav a:hover {
    background: var(--primary-light, #e0e7ff);
    color: var(--primary-color, #6366f1);
}

.blog-toc-nav a.active {
    background: var(--primary-color, #6366f1);
    color: white;
}

/* 移动端：隐藏 sidebar，恢复单列 */
@media (max-width: 900px) {
    .category-briefs {
        grid-template-columns: 1fr;
    }

    .blog-layout {
        grid-template-columns: 1fr;
    }
    .blog-toc {
        display: none;
    }
}