/* ===== AIHUB 侧边栏样式 ===== */
/* 左侧导航菜单和分类列表 */

/* 侧边栏容器 */
.aihub-sidebar-container {
    padding: var(--aihub-space-6);
    height: 100%;
}

/* 侧边栏标题 */
.aihub-sidebar-title {
    display: flex;
    align-items: center;
    margin-bottom: var(--aihub-space-4);
    padding-bottom: var(--aihub-space-3);
    font-size: var(--aihub-font-lg);
    font-weight: 600;
    color: var(--aihub-gray-900);
    border-bottom: 2px solid var(--aihub-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.aihub-sidebar-title i {
    margin-right: var(--aihub-space-2);
    color: var(--aihub-primary);
    font-size: var(--aihub-font-base);
}

/* 分类导航列表 */
.aihub-category-nav {
    list-style: none;
    margin: 0;
    padding: 0;
}

.aihub-category-item {
    margin-bottom: var(--aihub-space-1);
}

.aihub-category-link {
    display: flex;
    align-items: center;
    padding: var(--aihub-space-3) var(--aihub-space-4);
    color: var(--aihub-gray-700);
    text-decoration: none;
    border-radius: var(--aihub-radius-lg);
    transition: var(--aihub-transition);
    font-size: var(--aihub-font-sm);
    font-weight: 500;
    position: relative;
    overflow: hidden;
}

.aihub-category-link::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 0;
    background: linear-gradient(135deg, var(--aihub-primary) 0%, var(--aihub-primary-hover) 100%);
    transition: var(--aihub-transition);
    z-index: 0;
}

.aihub-category-link:hover::before,
.aihub-category-link.active::before {
    width: 4px;
}

.aihub-category-link:hover {
    color: var(--aihub-primary);
    background-color: var(--aihub-primary-light);
    text-decoration: none;
    transform: translateX(4px);
}

.aihub-category-link.active {
    color: var(--aihub-primary);
    background-color: var(--aihub-primary-light);
    font-weight: 600;
}

.aihub-category-link i {
    margin-right: var(--aihub-space-3);
    width: 18px;
    text-align: center;
    font-size: var(--aihub-font-sm);
    position: relative;
    z-index: 1;
}

.aihub-category-text {
    position: relative;
    z-index: 1;
    flex: 1;
}

/* 文章计数徽章 */
.aihub-category-count {
    margin-left: auto;
    padding: var(--aihub-space-1) var(--aihub-space-2);
    font-size: var(--aihub-font-xs);
    font-weight: 600;
    color: var(--aihub-gray-500);
    background-color: var(--aihub-gray-100);
    border-radius: var(--aihub-radius-full);
    min-width: 24px;
    text-align: center;
    position: relative;
    z-index: 1;
    transition: var(--aihub-transition);
}

.aihub-category-link:hover .aihub-category-count,
.aihub-category-link.active .aihub-category-count {
    color: var(--aihub-primary);
    background-color: var(--aihub-white);
}

/* 分类图标样式 */
.aihub-category-link .bi-house-door { color: var(--aihub-success); }
.aihub-category-link .bi-newspaper { color: var(--aihub-info); }
.aihub-category-link .bi-image { color: var(--aihub-warning); }
.aihub-category-link .bi-play-circle { color: var(--aihub-danger); }
.aihub-category-link .bi-github { color: var(--aihub-gray-700); }
.aihub-category-link .bi-mic { color: var(--aihub-primary); }
.aihub-category-link .bi-diagram-3 { color: var(--aihub-secondary); }
.aihub-category-link .bi-gear { color: var(--aihub-gray-600); }
.aihub-category-link .bi-folder { color: var(--aihub-gray-500); }

/* 侧边栏分组 */
.aihub-sidebar-group {
    margin-bottom: var(--aihub-space-6);
}

.aihub-sidebar-group:last-child {
    margin-bottom: 0;
}

.aihub-sidebar-group-title {
    display: flex;
    align-items: center;
    margin-bottom: var(--aihub-space-3);
    padding: var(--aihub-space-2) 0;
    font-size: var(--aihub-font-sm);
    font-weight: 600;
    color: var(--aihub-gray-600);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--aihub-gray-200);
}

.aihub-sidebar-group-title i {
    margin-right: var(--aihub-space-2);
    font-size: var(--aihub-font-xs);
}

/* 最近文章列表 */
.aihub-recent-articles {
    list-style: none;
    margin: 0;
    padding: 0;
}

.aihub-recent-article {
    margin-bottom: var(--aihub-space-3);
    padding-bottom: var(--aihub-space-3);
    border-bottom: 1px solid var(--aihub-gray-100);
}

.aihub-recent-article:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.aihub-recent-article-link {
    display: block;
    color: var(--aihub-gray-700);
    text-decoration: none;
    transition: var(--aihub-transition);
}

.aihub-recent-article-link:hover {
    color: var(--aihub-primary);
    text-decoration: none;
}

.aihub-recent-article-title {
    font-size: var(--aihub-font-sm);
    font-weight: 500;
    line-height: var(--aihub-leading-tight);
    margin-bottom: var(--aihub-space-1);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.aihub-recent-article-meta {
    display: flex;
    align-items: center;
    font-size: var(--aihub-font-xs);
    color: var(--aihub-gray-500);
    gap: var(--aihub-space-2);
}

.aihub-recent-article-date {
    display: flex;
    align-items: center;
}

.aihub-recent-article-date i {
    margin-right: var(--aihub-space-1);
}

.aihub-recent-article-category {
    display: flex;
    align-items: center;
    padding: 2px var(--aihub-space-1);
    background-color: var(--aihub-gray-100);
    border-radius: var(--aihub-radius-sm);
    font-weight: 500;
}

/* 标签云 */
.aihub-tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: var(--aihub-space-2);
    margin-top: var(--aihub-space-3);
}

.aihub-tag {
    display: inline-flex;
    align-items: center;
    padding: var(--aihub-space-1) var(--aihub-space-3);
    font-size: var(--aihub-font-xs);
    font-weight: 500;
    color: var(--aihub-gray-600);
    background-color: var(--aihub-gray-100);
    border-radius: var(--aihub-radius-full);
    text-decoration: none;
    transition: var(--aihub-transition);
}

.aihub-tag:hover {
    color: var(--aihub-white);
    background-color: var(--aihub-primary);
    text-decoration: none;
    transform: translateY(-1px);
}

/* 搜索框 */
.aihub-sidebar-search {
    margin-bottom: var(--aihub-space-6);
}

.aihub-sidebar-search-form {
    position: relative;
}

.aihub-sidebar-search-input {
    width: 100%;
    padding: var(--aihub-space-3) var(--aihub-space-10) var(--aihub-space-3) var(--aihub-space-4);
    font-size: var(--aihub-font-sm);
    color: var(--aihub-gray-700);
    background-color: var(--aihub-white);
    border: 1px solid var(--aihub-gray-300);
    border-radius: var(--aihub-radius-lg);
    transition: var(--aihub-transition);
}

.aihub-sidebar-search-input:focus {
    outline: none;
    border-color: var(--aihub-primary);
    box-shadow: 0 0 0 3px var(--aihub-primary-light);
}

.aihub-sidebar-search-input::placeholder {
    color: var(--aihub-gray-400);
}

.aihub-sidebar-search-button {
    position: absolute;
    right: var(--aihub-space-2);
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--aihub-gray-400);
    cursor: pointer;
    padding: var(--aihub-space-2);
    border-radius: var(--aihub-radius);
    transition: var(--aihub-transition);
}

.aihub-sidebar-search-button:hover {
    color: var(--aihub-primary);
    background-color: var(--aihub-primary-light);
}

/* 统计信息 */
.aihub-sidebar-stats {
    padding: var(--aihub-space-4);
    background: linear-gradient(135deg, var(--aihub-primary-light) 0%, rgba(37, 99, 235, 0.05) 100%);
    border-radius: var(--aihub-radius-lg);
    border: 1px solid rgba(37, 99, 235, 0.1);
}

.aihub-stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--aihub-space-3);
}

.aihub-stat-item {
    text-align: center;
}

.aihub-stat-number {
    display: block;
    font-size: var(--aihub-font-lg);
    font-weight: 700;
    color: var(--aihub-primary);
    line-height: 1;
}

.aihub-stat-label {
    font-size: var(--aihub-font-xs);
    color: var(--aihub-gray-600);
    margin-top: var(--aihub-space-1);
}

/* 社交链接 */
.aihub-sidebar-social {
    margin-top: var(--aihub-space-6);
    padding-top: var(--aihub-space-4);
    border-top: 1px solid var(--aihub-gray-200);
}

.aihub-social-links {
    display: flex;
    justify-content: center;
    gap: var(--aihub-space-3);
}

.aihub-social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    color: var(--aihub-gray-500);
    background-color: var(--aihub-gray-100);
    border-radius: var(--aihub-radius-full);
    text-decoration: none;
    transition: var(--aihub-transition);
}

.aihub-social-link:hover {
    color: var(--aihub-white);
    background-color: var(--aihub-primary);
    text-decoration: none;
    transform: translateY(-2px);
}

/* 响应式设计 */
@media (max-width: 767.98px) {
    .aihub-sidebar-container {
        padding: var(--aihub-space-4);
    }
    
    .aihub-sidebar-title {
        font-size: var(--aihub-font-base);
        margin-bottom: var(--aihub-space-3);
    }
    
    .aihub-category-link {
        padding: var(--aihub-space-2) var(--aihub-space-3);
        font-size: var(--aihub-font-xs);
    }
    
    .aihub-sidebar-group {
        margin-bottom: var(--aihub-space-4);
    }
    
    .aihub-stats-grid {
        grid-template-columns: 1fr;
        gap: var(--aihub-space-2);
    }
    
    .aihub-social-links {
        gap: var(--aihub-space-2);
    }
    
    .aihub-social-link {
        width: 32px;
        height: 32px;
    }
}

/* 滚动条样式 */
.aihub-sidebar::-webkit-scrollbar {
    width: 6px;
}

.aihub-sidebar::-webkit-scrollbar-track {
    background: var(--aihub-gray-50);
}

.aihub-sidebar::-webkit-scrollbar-thumb {
    background: var(--aihub-gray-300);
    border-radius: var(--aihub-radius);
}

.aihub-sidebar::-webkit-scrollbar-thumb:hover {
    background: var(--aihub-gray-400);
}

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

.aihub-category-item {
    animation: aihubSlideInLeft 0.3s ease-out;
    animation-fill-mode: both;
}

.aihub-category-item:nth-child(1) { animation-delay: 0.1s; }
.aihub-category-item:nth-child(2) { animation-delay: 0.2s; }
.aihub-category-item:nth-child(3) { animation-delay: 0.3s; }
.aihub-category-item:nth-child(4) { animation-delay: 0.4s; }
.aihub-category-item:nth-child(5) { animation-delay: 0.5s; }
.aihub-category-item:nth-child(6) { animation-delay: 0.6s; }
.aihub-category-item:nth-child(7) { animation-delay: 0.7s; }
.aihub-category-item:nth-child(8) { animation-delay: 0.8s; }

/* 悬停效果增强 */
.aihub-category-link {
    position: relative;
    overflow: hidden;
}

.aihub-category-link::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.aihub-category-link:hover::after {
    left: 100%;
}