/* ========== CSS 自定义属性 — 亮色模式 ========== */
:root {
    /* 主色系 — 统一为紫色 */
    --primary: #6366F1;
    --primary-color: #6366F1;
    --primary-light: #818CF8;
    --primary-dark: #4F46E5;
    --secondary-color: #A78BFA;

    /* 主色背景/交互 */
    --primary-bg: rgba(99, 102, 241, 0.08);
    --primary-bg-hover: rgba(99, 102, 241, 0.14);

    /* 背景色 */
    --bg-primary: #FFFFFF;
    --bg-secondary: #FAFBFC;
    --card-bg: #FFFFFF;

    /* 文字色 */
    --text-primary: #1A1D26;
    --text-secondary: #4A4A6A;
    --text-muted: #94A3B8;
    --text-light: #94A3B8;

    /* 边框 */
    --border: #E8ECF1;
    --border-color: #E8ECF1;
    --border-light: #F0F2F5;

    /* 阴影 — 带主色色调的柔和投影 */
    --shadow-sm: 0 1px 3px rgba(99, 102, 241, 0.04);
    --shadow-md: 0 4px 16px rgba(99, 102, 241, 0.06);
    --shadow-lg: 0 8px 24px rgba(99, 102, 241, 0.08);
    --shadow-glow: 0 8px 30px rgba(99, 102, 241, 0.10);

    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --border-radius-md: 12px;
    --border-radius-lg: 16px;

    /* 过渡 */
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========== CSS 自定义属性 — 暗色模式 ========== */
body.dark-theme {
    /* 主色 — 暗色下提亮一点 */
    --primary: #818CF8;
    --primary-color: #818CF8;
    --primary-light: #A5B4FC;
    --primary-dark: #6366F1;
    --secondary-color: #C4B5FD;

    /* 主色背景/交互 */
    --primary-bg: rgba(129, 140, 248, 0.12);
    --primary-bg-hover: rgba(129, 140, 248, 0.18);

    /* 背景色 — 从纯黑 #1a1a1a 改为 Slate 色系 */
    --bg-primary: #1E293B;       /* Slate-800 卡片 */
    --bg-secondary: #0F172A;     /* Slate-900 页面 */
    --card-bg: #1E293B;          /* 卡片背景 */

    /* 文字色 */
    --text-primary: #E2E8F0;
    --text-secondary: #94A3B8;
    --text-muted: #64748B;
    --text-light: #64748B;

    /* 边框 */
    --border: #334155;
    --border-color: #334155;
    --border-light: #273548;

    /* 阴影 — 暗色下纯黑阴影 */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.25);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.45);
    --shadow-glow: 0 8px 30px rgba(99, 102, 241, 0.15);

    /* 圆角和过渡不变 */
}

/* ========== 侧边栏通用区块 ========== */
.sidebar-section {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    border-left: 4px solid var(--primary);
    transition: var(--transition);
}

.sidebar-section:hover {
    box-shadow: var(--shadow-md);
}

.sidebar-title {
    color: var(--primary);
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 14px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary-bg);
    display: flex;
    align-items: center;
    gap: 8px;
    position: relative;
}

.sidebar-title::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 32px;
    height: 2px;
    background: var(--primary);
    border-radius: 1px;
}

/* ========== 文章列表（通用） ========== */
.latest-articles,
.hot-articles,
.archive-list,
.sidebar-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.latest-article-item,
.hot-article-item,
.sidebar-list-item {
    margin-bottom: 0;
    border-bottom: 1px solid var(--border-light);
}

.latest-article-item:last-child,
.hot-article-item:last-child,
.sidebar-list-item:last-child {
    border-bottom: none;
}

/* 列表项链接 */
.latest-article-link,
.hot-article-title a,
.archive-list li a,
.sidebar-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    line-height: 1.5;
    display: block;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.latest-article-link:hover,
.hot-article-title a:hover,
.archive-list li a:hover,
.sidebar-link:hover {
    color: var(--primary);
    background: var(--primary-bg);
    transform: translateX(4px);
}

/* ========== 归档项 ========== */
.archive-list li {
    margin-bottom: 0;
    border-bottom: 1px solid var(--border-light);
}

.archive-list li:last-child {
    border-bottom: none;
}

.archive-count {
    color: var(--text-muted);
    font-size: 12px;
    background: var(--primary-bg);
    padding: 2px 8px;
    border-radius: 10px;
    margin-left: 8px;
}

/* ========== 空状态 ========== */
.empty-item {
    color: var(--text-muted);
    font-size: 14px;
    padding: 12px;
    text-align: center;
    list-style: none;
}

/* ========== 掘金侧边栏 ========== */
.sidebar-juejin {
    border-left: 4px solid #0ea5e9 !important;
}

.sidebar-juejin .sidebar-title {
    color: #0ea5e9;
}

.sidebar-juejin .sidebar-title::after {
    background: #0ea5e9;
}

.sidebar-juejin .sidebar-link:hover {
    color: #0ea5e9;
    background: #e0f7ff;
}

/* ========== CSDN 侧边栏 ========== */
.sidebar-csdn {
    border-left: 4px solid #fc5531 !important;
}

.sidebar-csdn .sidebar-title {
    color: #fc5531;
}

.sidebar-csdn .sidebar-title::after {
    background: #fc5531;
}

.sidebar-csdn .sidebar-link:hover {
    color: #fc5531;
    background: #fff0ed;
}

/* ========== Widget 风格（保留兼容） ========== */
.sidebar-widget {
    padding: 2rem;
    margin-bottom: 1.5rem;
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.sidebar-widget:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.sidebar-widget .widget-title {
    color: var(--primary);
    font-weight: 700;
    font-size: 1.25rem;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--primary-bg);
    position: relative;
    display: flex;
    align-items: center;
    gap: 8px;
}

.sidebar-widget .widget-title::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 40px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    border-radius: 2px;
}

.sidebar-widget .article-list {
    list-style: none;
    padding-left: 0;
    margin-bottom: 0;
    line-height: 1.8;
}

.sidebar-widget .article-list li {
    margin-bottom: 0.75rem;
    position: relative;
    padding-left: 16px;
}

.sidebar-widget .article-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px;
    height: 6px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: 50%;
    transition: var(--transition);
}

.sidebar-widget .article-list li:hover::before {
    transform: scale(1.5);
    box-shadow: 0 0 10px var(--primary-bg);
}

.sidebar-widget .link-item {
    color: var(--text-secondary);
    text-decoration: none;
    display: block;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: var(--transition);
    font-weight: 400;
    padding: 4px 0;
}

.sidebar-widget .link-item:hover {
    color: var(--primary);
    transform: translateX(6px);
}

.sidebar-widget .social-item {
    color: var(--text-secondary);
    text-decoration: none;
    display: block;
    margin-bottom: 0.75rem;
    transition: var(--transition);
    font-weight: 400;
    padding: 4px 0;
}

.sidebar-widget .social-item:hover {
    color: var(--primary);
    transform: translateX(6px);
}

.sidebar-widget .empty-tip {
    color: var(--text-muted);
    font-size: 0.9rem;
    padding: 1rem 0;
    text-align: center;
    font-style: italic;
}

.sidebar-widget .article-link {
    color: var(--text-secondary) !important;
    text-decoration: none !important;
    display: block;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: var(--transition);
    font-weight: 400;
    padding: 4px 0;
}

.sidebar-widget .article-link:hover {
    color: var(--primary) !important;
    transform: translateX(6px);
}

.sidebar-widget .archive-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    transition: var(--transition);
}

.sidebar-widget .archive-item:hover {
    transform: translateX(6px);
}

.sidebar-widget .archive-count {
    color: var(--text-muted);
    font-size: 0.8rem;
    background: var(--primary-bg);
    padding: 2px 8px;
    border-radius: 10px;
    transition: var(--transition);
}

.sidebar-widget .archive-item:hover .archive-count {
    background: var(--primary-bg-hover);
    color: var(--primary);
}

/* ========== 响应式 ========== */
@media (max-width: 992px) {
    .blog-sidebar {
        margin-top: 24px;
    }

    .sidebar-section {
        padding: 16px;
        margin-bottom: 16px;
    }
}

@media (max-width: 768px) {
    .blog-sidebar {
        margin-top: 20px;
    }

    .sidebar-section {
        padding: 14px;
        margin-bottom: 14px;
        border-radius: var(--radius-md);
    }

    .sidebar-section .sidebar-title {
        font-size: 15px;
        margin-bottom: 10px;
    }

    .latest-article-link,
    .hot-article-title a,
    .archive-list li a,
    .sidebar-link {
        font-size: 13px;
        padding: 8px 10px;
    }

    .sidebar-widget {
        padding: 1.25rem;
        margin-bottom: 1rem;
    }

    .sidebar-widget .widget-title {
        font-size: 1.1rem;
        margin-bottom: 0.75rem;
    }
}

@media (max-width: 576px) {
    .sidebar-section {
        padding: 12px;
        margin-bottom: 12px;
    }

    .sidebar-widget {
        padding: 1rem;
    }
}