/**
 * OneNav - Medium 风格阅读样式
 * 适用于 single.php 和 single-sites.php
 * 只调整 CSS，不修改 PHP/JS 代码
 *
 * @author: Claude Code
 * @date: 2025-01-12
 */

/* ========================================
   全局变量和基础设置
   ======================================== */
:root {
    /* 标题字体 - 现代无衬线字体，干净清晰 */
    --medium-font-serif: "Merriweather", "Georgia", "Cambria", "Times New Roman", Times, serif;
    --medium-font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;

    /* 正文字体 - 适合中文阅读 */
    --medium-font-body: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --medium-text-primary: #242424;
    --medium-text-secondary: #6b6b6b;
    --medium-text-tertiary: #9e9e9e;
    --medium-bg-primary: #ffffff;
    --medium-bg-secondary: #fafafa;
    --medium-accent-color: #1a8917;
    --medium-border-color: rgba(0, 0, 0, 0.08);
    --medium-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
    --medium-shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --medium-shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
    --medium-radius-sm: 4px;
    --medium-radius-md: 8px;
    --medium-radius-lg: 16px;
    --medium-content-width: 800px;
    --medium-spacing-xs: 8px;
    --medium-spacing-sm: 16px;
    --medium-spacing-md: 24px;
    --medium-spacing-lg: 32px;
    --medium-spacing-xl: 48px;
}

/* ========================================
   Single 页面内容区域
   ======================================== */

/* 文章详情页 - Grid 布局基础 */
.single .content-layout {
    max-width: var(--medium-content-width);
    padding: 0 var(--medium-spacing-md);
}

/* ========================================
   Medium 风格面包屑导航
   ======================================== */

/* 面包屑容器 - 左对齐、简洁 */
.single nav[aria-label="breadcrumb"] {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    flex-wrap: wrap;
    margin-bottom: var(--medium-spacing-sm) !important;
    margin-top: 0 !important;
    padding: var(--medium-spacing-sm) var(--medium-spacing-md);
    font-family: var(--medium-font-sans);
    font-size: 0.875rem;
    color: var(--medium-text-secondary);
    line-height: 1.5;
}

/* 隐藏原有图标 */
.single nav[aria-label="breadcrumb"] .iconfont {
    display: none;
}

/* 隐藏原有分隔符 */
.single nav[aria-label="breadcrumb"] .text-danger {
    display: none;
}

/* 使用 CSS ::after 添加新的分隔符 */
.single nav[aria-label="breadcrumb"] a:not(:last-child)::after,
.single nav[aria-label="breadcrumb"] .icon-home + a:not(:last-child)::after {
    content: "/";
    margin: 0 0.5em;
    color: var(--medium-border-color);
    font-weight: 300;
}

/* 链接样式 */
.single nav[aria-label="breadcrumb"] a,
.single nav[aria-label="breadcrumb"] .crumbs {
    color: var(--medium-text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
    position: relative;
}

.single nav[aria-label="breadcrumb"] a:hover {
    color: var(--medium-text-primary);
}

/* 悬停时显示下划线效果 */
.single nav[aria-label="breadcrumb"] a::before {
    content: "";
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 0;
    height: 1px;
    background-color: var(--medium-accent-color);
    transition: width 0.2s ease;
}

.single nav[aria-label="breadcrumb"] a:hover::before {
    width: 100%;
}

/* 当前页面项 */
.single nav[aria-label="breadcrumb"] span[aria-current="page"] {
    color: var(--medium-text-primary);
    font-weight: 500;
}

/* 分类链接容器 */
.single nav[aria-label="breadcrumb"] .crumbs + a,
.single nav[aria-label="breadcrumb"] a[href*="/category/"],
.single nav[aria-label="breadcrumb"] a[href*="/favorites/"] {
    display: inline-flex;
    align-items: center;
}

/* 分类链接前的 Home 图标替代方案 */
.single nav[aria-label="breadcrumb"] > a:first-child {
    position: relative;
    padding-left: 1.2em;
}

.single nav[aria-label="breadcrumb"] > a:first-child::before {
    content: "⌂";
    position: absolute;
    left: 0;
    font-size: 1em;
    color: var(--medium-text-tertiary);
    font-weight: normal;
}

/* 移动端优化 */
@media (max-width: 768px) {
    .single nav[aria-label="breadcrumb"] {
        font-size: 0.8125rem;
        margin-bottom: var(--medium-spacing-xs) !important;
        padding: var(--medium-spacing-xs) var(--medium-spacing-md);
    }

    .single nav[aria-label="breadcrumb"] a:not(:last-child)::after {
        margin: 0 0.4em;
    }

    /* 移动端隐藏过长的标题 */
    .single nav[aria-label="breadcrumb"] span[aria-current="page"] {
        max-width: 200px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
        display: inline-block;
        vertical-align: middle;
    }
}

/* 暗黑模式适配 */
.io-black-mode.single nav[aria-label="breadcrumb"] {
    color: var(--muted-color);
}

.io-black-mode.single nav[aria-label="breadcrumb"] a {
    color: var(--muted-color);
}

.io-black-mode.single nav[aria-label="breadcrumb"] a:hover {
    color: var(--main-color);
}

.io-black-mode.single nav[aria-label="breadcrumb"] span[aria-current="page"] {
    color: var(--main-color);
}

.io-black-mode.single nav[aria-label="breadcrumb"] a:not(:last-child)::after {
    color: rgba(255, 255, 255, 0.15);
}

.io-black-mode.single nav[aria-label="breadcrumb"] > a:first-child::before {
    color: var(--muted-color);
}

/* 卡片容器优化 */
.single .panel.card,
.single-sites .panel.card {
    background: var(--medium-bg-primary);
    border: 1px solid var(--medium-border-color);
    border-radius: var(--medium-radius-lg);
    box-shadow: var(--medium-shadow-sm);
    overflow: hidden;
    transition: box-shadow 0.3s ease;
}

.single .panel.card:hover,
.single-sites .panel.card:hover {
    box-shadow: var(--medium-shadow-md);
}

/* 卡片主体内容区 */
.single .card-body,
.single-sites .card-body {
    padding: var(--medium-spacing-xl) var(--medium-spacing-lg);
}

@media (max-width: 768px) {
    .single .card-body,
    .single-sites .card-body {
        padding: var(--medium-spacing-lg) var(--medium-spacing-md);
    }
}

/* ========================================
   文章标题区域 - Medium 风格
   ======================================== */

.single .panel-header {
    margin-bottom: var(--medium-spacing-lg) !important;
    padding-bottom: var(--medium-spacing-md);
}

/* 主标题优化 */
.single .panel-header h1.h3,
.single .panel-header .h3 {
    font-family: var(--medium-font-sans);
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--medium-text-primary);
    margin-bottom: var(--medium-spacing-md) !important;
}

@media (max-width: 768px) {
    .single .panel-header h1.h3,
    .single .panel-header .h3 {
        font-size: 1.75rem;
    }
}

/* 元数据区域优化 */
.single .panel-header .border-bottom {
    border-color: var(--medium-border-color) !important;
    padding-bottom: var(--medium-spacing-sm);
}

.single .panel-header .d-flex {
    font-family: var(--medium-font-sans);
    font-size: 0.875rem;
    color: var(--medium-text-secondary);
}

.single .panel-header .d-flex a {
    color: var(--medium-text-secondary);
    transition: color 0.2s ease;
}

.single .panel-header .d-flex a:hover {
    color: var(--medium-text-primary);
}

.single .panel-header .iconfont {
    font-size: 0.875rem;
    opacity: 0.7;
}

/* ========================================
   正文内容区域 - 核心阅读优化
   ======================================== */

.single .panel-body.single,
.single-sites .panel-body.single {
    font-family: var(--medium-font-body);
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--medium-text-primary);
    word-wrap: break-word;
}

/* 段落间距 */
.single .panel-body.single p,
.single-sites .panel-body.single p,
.panel-body p,
.site-content p {
    margin-bottom: 1.6em;
    font-size: 1.125rem;
    line-height: 1.8;
}

/* 首段落首字母下沉效果 (仅英文生效) */
.single .panel-body.single > p:first-of-type::first-letter {
    /* float: left;
    font-size: 3.5rem;
    line-height: 0.8;
    padding-right: 0.1em;
    font-weight: 700;
    color: var(--medium-text-primary); */
    /* 中文不需要首字母下沉效果，已注释 */
}

/* ========================================
   标题层级优化
   ======================================== */

.single .panel-body.single h2,
.single-sites .panel-body.single h2,
.single .panel-body.single h3,
.single-sites .panel-body.single h3,
.single .panel-body.single h4,
.single-sites .panel-body.single h4 {
    font-family: var(--medium-font-sans);
    font-weight: 600;
    color: var(--medium-text-primary);
    margin-top: 2em;
    margin-bottom: 1em;
    letter-spacing: -0.01em;
}

.single .panel-body.single h2,
.single-sites .panel-body.single h2 {
    font-size: 1.75rem;
}

.single .panel-body.single h3,
.single-sites .panel-body.single h3 {
    font-size: 1.375rem;
}

.single .panel-body.single h4,
.single-sites .panel-body.single h4 {
    font-size: 1.125rem;
}

/* ========================================
   引用块优化
   ======================================== */

.single .panel-body.single blockquote,
.single-sites .panel-body.single blockquote {
    margin: 2em 0;
    padding: 1em 1.5em;
    border-left: 4px solid var(--medium-text-secondary);
    background: var(--medium-bg-secondary);
    border-radius: 0 var(--medium-radius-md) var(--medium-radius-md) 0;
    font-style: italic;
    font-size: 1.1rem;
    color: var(--medium-text-secondary);
}

/* ========================================
   链接样式优化
   ======================================== */

.single .panel-body.single a,
.single-sites .panel-body.single a {
    color: var(--medium-text-primary);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
    text-decoration-color: var(--medium-text-tertiary);
    transition: all 0.2s ease;
}

.single .panel-body.single a:hover,
.single-sites .panel-body.single a:hover {
    color: var(--medium-accent-color);
    text-decoration-color: var(--medium-accent-color);
}

/* ========================================
   图片优化
   ======================================== */

.single .panel-body.single img,
.single-sites .panel-body.single img {
    border-radius: var(--medium-radius-md);
    box-shadow: var(--medium-shadow-sm);
    margin: 2em auto;
    display: block;
    max-width: 100%;
    height: auto;
}

/* 图片说明文字 */
.single .panel-body.single figcaption,
.single-sites .panel-body.single figcaption {
    text-align: center;
    font-size: 0.875rem;
    color: var(--medium-text-tertiary);
    margin-top: var(--medium-spacing-sm);
    font-family: var(--medium-font-sans);
}

/* ========================================
   列表优化
   ======================================== */

.single .panel-body.single ul,
.single-sites .panel-body.single ul,
.single .panel-body.single ol,
.single-sites .panel-body.single ol {
    margin: 1.5em 0;
    padding-left: 1.5em;
}

.single .panel-body.single li,
.single-sites .panel-body.single li {
    margin-bottom: 0.75em;
    line-height: 1.7;
}

.single .panel-body.single ul li,
.single-sites .panel-body.single ul li {
    list-style-type: disc;
}

.single .panel-body.single ol li,
.single-sites .panel-body.single ol li {
    list-style-type: decimal;
}

/* ========================================
   代码块优化
   ======================================== */

.single .panel-body.single code,
.single-sites .panel-body.single code {
    font-family: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, "Courier New", monospace;
    font-size: 0.9em;
    background: var(--medium-bg-secondary);
    color: var(--medium-text-primary);
    padding: 0.2em 0.4em;
    border-radius: var(--medium-radius-sm);
}

.single .panel-body.single pre,
.single-sites .panel-body.single pre {
    background: var(--medium-bg-secondary);
    border: 1px solid var(--medium-border-color);
    border-radius: var(--medium-radius-md);
    padding: var(--medium-spacing-md);
    overflow-x: auto;
    margin: 1.5em 0;
}

.single .panel-body.single pre code,
.single-sites .panel-body.single pre code {
    background: none;
    padding: 0;
    font-size: 0.875rem;
    line-height: 1.6;
}

/* ========================================
   表格优化
   ======================================== */

.single .panel-body.single table,
.single-sites .panel-body.single table {
    width: 100%;
    border-collapse: collapse;
    margin: 2em 0;
    font-size: 0.95rem;
}

.single .panel-body.single table th,
.single-sites .panel-body.single table th {
    background: var(--medium-bg-secondary);
    font-weight: 600;
    padding: 0.75em 1em;
    text-align: left;
    border-bottom: 2px solid var(--medium-border-color);
}

.single .panel-body.single table td,
.single-sites .panel-body.single table td {
    padding: 0.75em 1em;
    border-bottom: 1px solid var(--medium-border-color);
}

/* ========================================
   Sites 页面头部优化
   ======================================== */

/* Sites 内容区域 */
.single-sites .content-layout {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 var(--medium-spacing-md);
}

/* Sites 头部标题 */
.single-sites .site-name.h3,
.single-sites h1.site-name {
    font-family: var(--medium-font-sans);
    font-size: 2rem;
    font-weight: 700;
    line-height: 1.3;
    color: var(--medium-text-primary);
    letter-spacing: -0.02em;
}

/* Sites 信息表格优化 */
.single-sites .table-row {
    display: flex;
    padding: 0.75em 0;
    border-bottom: 1px solid var(--medium-border-color);
}

.single-sites .table-row:last-child {
    border-bottom: none;
}

.single-sites .table-title {
    font-family: var(--medium-font-sans);
    font-weight: 600;
    color: var(--medium-text-secondary);
    min-width: 120px;
    font-size: 0.875rem;
}

.single-sites .table-value {
    color: var(--medium-text-primary);
    font-size: 0.875rem;
}

/* Sites 预览图优化 - 3:4 高宽比设计 */
.single-sites .sites-preview {
    border-radius: var(--medium-radius-lg);
    overflow: hidden;
    box-shadow: var(--medium-shadow-md);
    /* 3:4 高宽比 - 宽度自适应，高度按比例 */
    width: 100%;
    max-width: 600px;
}

.single-sites .preview-body {
    background: var(--medium-bg-secondary);
    border-radius: var(--medium-radius-md);
    /* 3:4 高宽比实现 */
    aspect-ratio: 4 / 3;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.single-sites .site-favicon {
    padding: var(--medium-spacing-sm) var(--medium-spacing-md);
    border-bottom: 1px solid var(--medium-border-color);
    flex-shrink: 0; /* 防止被压缩 */
}

.single-sites .site-favicon img {
    border-radius: var(--medium-radius-sm);
    width: 20px;
    height: 20px;
}

.single-sites .site-favicon span {
    font-size: 0.875rem;
    font-weight: 500;
}

.single-sites .site-img {
    flex: 1; /* 占据剩余空间 */
    width: 100%;
    overflow: hidden;
    border-radius: 0;
    margin-top: 0;
    border: none;
}

.single-sites .site-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top center;
    border-radius: 0;
    box-shadow: none;
}

/* ========================================
   分隔线优化
   ======================================== */

.single .panel-body.single hr,
.single-sites .panel-body.single hr {
    border: none;
    height: 1px;
    background: var(--medium-border-color);
    margin: 3em 0;
}

/* ========================================
   文章标签区域优化
   ======================================== */

.single .post-tags {
    font-family: var(--medium-font-sans);
    font-size: 0.875rem;
    padding: var(--medium-spacing-md) 0;
    border-top: 1px solid var(--medium-border-color);
    margin-top: var(--medium-spacing-lg);
}

.single .post-tags a {
    display: inline-block;
    padding: 0.35em 0.85em;
    margin: 0.25em 0.25em 0.25em 0;
    background: var(--medium-bg-secondary);
    color: var(--medium-text-secondary);
    border-radius: 20px;
    font-size: 0.8125rem;
    text-decoration: none !important;
    transition: all 0.2s ease;
}

.single .post-tags a:hover {
    background: var(--medium-text-primary);
    color: var(--medium-bg-primary);
}

/* ========================================
   上一篇/下一篇导航优化
   ======================================== */

.single .near-navigation {
    display: flex;
    gap: var(--medium-spacing-md);
    margin-top: var(--medium-spacing-xl);
}

.single .near-navigation .nav {
    flex: 1;
    padding: var(--medium-spacing-md);
    background: var(--medium-bg-primary);
    border: 1px solid var(--medium-border-color);
    border-radius: var(--medium-radius-md);
    transition: all 0.3s ease;
}

.single .near-navigation .nav:hover {
    box-shadow: var(--medium-shadow-md);
    transform: translateY(-2px);
}

.single .near-navigation .nav.none {
    opacity: 0.5;
    cursor: default;
}

.single .near-navigation .nav a {
    text-decoration: none;
}

.single .near-navigation .near-title {
    font-family: var(--medium-font-sans);
    font-size: 1rem;
    font-weight: 600;
    color: var(--medium-text-primary);
    margin-top: var(--medium-spacing-xs);
    margin-bottom: 0;
}

/* ========================================
   评论区域优化
   ======================================== */

.single .comments-area {
    margin-top: var(--medium-spacing-xl);
    padding-top: var(--medium-spacing-lg);
    border-top: 1px solid var(--medium-border-color);
}

.single .comments-area .comment-list {
    font-family: var(--medium-font-sans);
}

/* ========================================
   暗黑模式适配
   ======================================== */

.io-black-mode .single .panel.card,
.io-black-mode .single-sites .panel.card {
    background: var(--main-bg-color);
    border-color: rgba(255, 255, 255, 0.08);
}

.io-black-mode .single .panel-header h1.h3,
.io-black-mode .single .panel-header .h3,
.io-black-mode .single-sites .site-name.h3,
.io-black-mode .single-sites h1.site-name,
.io-black-mode .single .panel-body.single h2,
.io-black-mode .single-sites .panel-body.single h2,
.io-black-mode .single .panel-body.single h3,
.io-black-mode .single-sites .panel-body.single h3 {
    color: var(--main-color);
}

.io-black-mode .single .panel-body.single,
.io-black-mode .single-sites .panel-body.single,
.io-black-mode .single .panel-body.single p,
.io-black-mode .single-sites .panel-body.single p {
    color: var(--main-color);
}

.io-black-mode .single .panel-body.single blockquote,
.io-black-mode .single-sites .panel-body.single blockquote {
    background: rgba(255, 255, 255, 0.03);
    border-left-color: var(--muted-color);
    color: var(--muted-color);
}

.io-black-mode .single .panel-body.single code,
.io-black-mode .single-sites .panel-body.single code,
.io-black-mode .single .panel-body.single pre,
.io-black-mode .single-sites .panel-body.single pre {
    background: rgba(255, 255, 255, 0.05);
}

.io-black-mode .single .post-tags a {
    background: rgba(255, 255, 255, 0.05);
    color: var(--muted-color);
}

.io-black-mode .single .post-tags a:hover {
    background: var(--main-color);
    color: var(--main-bg-color);
}

.io-black-mode .single-sites .sites-preview .preview-body {
    background: rgba(255, 255, 255, 0.03);
}

/* ========================================
   响应式优化
   ======================================== */

@media (max-width: 992px) {
    .single .content-layout,
    .single-sites .content-layout {
        margin-left: 0 !important;
        margin-right: 0 !important;
    }
}

@media (max-width: 768px) {
    :root {
        --medium-spacing-xl: 32px;
        --medium-spacing-lg: 24px;
    }

    .single .near-navigation {
        flex-direction: column;
    }

    .single .near-navigation .nav {
        min-height: 80px;
    }

    .single-sites .site-content {
        flex-direction: column;
    }

    .single-sites .sites-preview {
        margin-left: 0 !important;
        margin-top: var(--medium-spacing-md) !important;
    }
}

/* ========================================
   打印样式优化
   ======================================== */

@media print {
    .single .panel.card,
    .single-sites .panel.card {
        box-shadow: none;
        border: none;
    }

    .single .panel-header,
    .single-sites .site-content {
        page-break-inside: avoid;
    }

    .single .panel-body.single a {
        color: var(--medium-text-primary) !important;
        text-decoration: underline;
    }
}

/* ========================================
   侧边栏 Grid 布局 (方案3 - CSS Grid)
   只修改 CSS，不修改 PHP/JS
   ======================================== */

@media (min-width: 992px) {
    /* 覆盖 clearfix 伪元素，防止干扰 Grid 布局 */
    body.sidebar_right.single .content::before,
    body.sidebar_right.single .content::after,
    body.sidebar_left.single .content::before,
    body.sidebar_left.single .content::after {
        display: none;
        content: none;
    }
    /* .content 容器使用 Grid 布局 */
    body.sidebar_right.single .content {
        display: grid;
        grid-template-columns: minmax(0, 1fr) 300px;
        gap: 15px;
        align-items: start;
    }

    /* 取消原有的 float 布局 */
    body.sidebar_right.single .content-wrap {
        float: none;
        width: auto;
        margin: 0;
    }

    body.sidebar_right.single .sidebar {
        float: none;
        width: 300px;
        margin: 0;
        position: static;
    }

    /* 内容区域设置 */
    body.sidebar_right.single .content-layout {
        margin: 0 !important;
        max-width: 100%;
    }

    /* 左侧边栏布局适配 */
    body.sidebar_left.single .content {
        display: grid;
        grid-template-columns: 300px minmax(0, 1fr);
        gap: 15px;
        align-items: start;
    }

    body.sidebar_left.single .content-wrap {
        float: none;
        width: auto;
        margin: 0;
    }

    body.sidebar_left.single .sidebar {
        float: none;
        width: 300px;
        margin: 0;
        position: static;
    }

    body.sidebar_left.single .content-layout {
        margin: 0 !important;
        max-width: 100%;
    }
}

/* 响应式：小屏幕恢复原有布局 */
@media (max-width: 991px) {
    body.sidebar_right.single .content,
    body.sidebar_left.single .content {
        display: block;
    }

    body.sidebar_right.single .sidebar,
    body.sidebar_left.single .sidebar {
        display: none;
    }

    body.sidebar_right.single .content-layout,
    body.sidebar_left.single .content-layout {
        margin: 0 !important;
    }
}