/*
Theme Name: Jay Theme
Theme URI: https://blog.jmfqy.top/
Author: Jay's 折腾笔记
Author URI: https://blog.jmfqy.top/
Description: 轻量、移动端优先的 WordPress 博客主题。卡片式文章流、横滑分类导航、深色模式，全部手写无重型框架。
Version: 1.0.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: jay-theme
Tags: blog, mobile-first, responsive, dark-mode, customizer
*/

/* ============ 基础重置 ============ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px; line-height: 1.7; color: var(--text);
  background: var(--bg); transition: background .3s, color .3s;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--link); text-decoration: none; }
a:hover { color: var(--link-hover); }
ul, ol { list-style: none; }

/* ============ CSS 变量（浅色默认） ============ */
:root {
  --bg: #f5f6f8;
  --card: #ffffff;
  --text: #1f2937;
  --text-2: #6b7280;
  --text-3: #9ca3af;
  --link: #2563eb;
  --link-hover: #1d4ed8;
  --primary: #2563eb;
  --primary-text: #ffffff;
  --border: #e5e7eb;
  --header-bg: rgba(255,255,255,.92);
  --shadow: 0 1px 3px rgba(0,0,0,.08);
  --radius: 12px;
  --code-bg: #f3f4f6;
}
/* 深色模式 */
[data-theme="dark"] {
  --bg: #111827;
  --card: #1f2937;
  --text: #e5e7eb;
  --text-2: #9ca3af;
  --text-3: #6b7280;
  --link: #60a5fa;
  --link-hover: #93c5fd;
  --primary: #3b82f6;
  --border: #374151;
  --header-bg: rgba(17,24,39,.92);
  --shadow: 0 1px 3px rgba(0,0,0,.3);
  --code-bg: #111827;
}

/* ============ 布局容器 ============ */
.container { max-width: 1080px; margin: 0 auto; padding: 0 14px; }
.main { padding: 14px 0 40px; min-height: 60vh; }

/* ============ 顶部导航栏 ============ */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: var(--header-bg); backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  max-width: 1080px; margin: 0 auto; padding: 0 14px;
  height: 56px; display: flex; align-items: center; gap: 12px;
}
.site-logo { font-size: 20px; font-weight: 800; color: var(--text); white-space: nowrap; }
.site-logo img { height: 32px; width: auto; }
.site-logo .custom-logo-link { display: inline-flex; align-items: center; }
.header-search { flex: 1; position: relative; }
.header-search input {
  width: 100%; height: 36px; border: 1px solid var(--border);
  border-radius: 18px; padding: 0 36px 0 14px;
  background: var(--bg); color: var(--text); font-size: 14px; outline: none;
}
.header-search input:focus { border-color: var(--primary); }
.header-search button {
  position: absolute; right: 4px; top: 4px; width: 28px; height: 28px;
  border: none; border-radius: 50%; background: transparent;
  color: var(--text-2); cursor: pointer; font-size: 15px;
}
.theme-toggle {
  width: 36px; height: 36px; border: 1px solid var(--border); border-radius: 50%;
  background: var(--card); color: var(--text); cursor: pointer;
  display: flex; align-items: center; justify-content: center; font-size: 17px;
  flex-shrink: 0;
}
.theme-toggle:hover { border-color: var(--primary); }

/* ============ 分类横滑导航 ============ */
.cat-nav {
  background: var(--card); border-bottom: 1px solid var(--border);
  position: sticky; top: 56px; z-index: 90;
}
.cat-nav-inner {
  max-width: 1080px; margin: 0 auto; padding: 0 14px;
  display: flex; gap: 6px; overflow-x: auto;
  scrollbar-width: none; -webkit-overflow-scrolling: touch;
}
.cat-nav-inner::-webkit-scrollbar { display: none; }
.cat-nav a {
  padding: 12px 14px; font-size: 14px; color: var(--text-2);
  white-space: nowrap; border-bottom: 2px solid transparent; flex-shrink: 0;
}
.cat-nav a:hover { color: var(--text); }
.cat-nav a.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 600; }

/* ============ 文章卡片流 ============ */
.post-list { display: flex; flex-direction: column; gap: 12px; margin-top: 14px; }
.post-card {
  background: var(--card); border-radius: var(--radius);
  box-shadow: var(--shadow); overflow: hidden;
  display: flex; gap: 12px; padding: 14px;
  transition: transform .2s, box-shadow .2s;
}
.post-card:active { transform: scale(.99); }
.post-card-content { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.post-card-title { font-size: 16px; font-weight: 700; line-height: 1.5; margin-bottom: 6px; }
.post-card-title a { color: var(--text); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.post-card-title a:hover { color: var(--primary); }
.post-card-excerpt {
  font-size: 13px; color: var(--text-2); line-height: 1.6;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
  margin-bottom: 8px; flex: 1;
}
.post-card-meta { display: flex; align-items: center; gap: 10px; font-size: 12px; color: var(--text-3); }
.post-card-meta .cat-tag {
  background: var(--primary); color: var(--primary-text);
  padding: 1px 8px; border-radius: 10px; font-size: 11px;
}
.post-card-thumb { width: 110px; height: 82px; flex-shrink: 0; border-radius: 8px; overflow: hidden; background: var(--bg); }
.post-card-thumb img { width: 100%; height: 100%; object-fit: cover; }

/* 大图模式（首篇或置顶） */
.post-card.featured { flex-direction: column; padding: 0; }
.post-card.featured .post-card-thumb { width: 100%; height: 180px; border-radius: 0; }
.post-card.featured .post-card-content { padding: 14px; }
.post-card.featured .post-card-title { font-size: 18px; }

/* ============ 分页 ============ */
.pagination { display: flex; justify-content: center; gap: 8px; margin: 24px 0; flex-wrap: wrap; }
.pagination a, .pagination span {
  min-width: 36px; height: 36px; padding: 0 10px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 8px; background: var(--card); color: var(--text-2);
  font-size: 14px; box-shadow: var(--shadow);
}
.pagination a:hover { color: var(--primary); }
.pagination .current { background: var(--primary); color: var(--primary-text); font-weight: 600; }

/* ============ 文章页 ============ */
.reading-progress {
  position: fixed; top: 0; left: 0; height: 3px; width: 0;
  background: var(--primary); z-index: 200; transition: width .1s;
}
.single-article {
  background: var(--card); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 20px 16px; margin-top: 14px;
}
.single-title { font-size: 22px; font-weight: 800; line-height: 1.5; margin-bottom: 10px; }
.single-meta { display: flex; flex-wrap: wrap; gap: 10px; font-size: 13px; color: var(--text-3); margin-bottom: 16px; padding-bottom: 16px; border-bottom: 1px solid var(--border); }
.single-content { font-size: 16px; line-height: 1.85; word-wrap: break-word; }
.single-content p { margin: 1em 0; }
.single-content h2, .single-content h3, .single-content h4 { margin: 1.4em 0 .6em; line-height: 1.5; font-weight: 700; }
.single-content h2 { font-size: 20px; padding-bottom: 6px; border-bottom: 1px solid var(--border); }
.single-content h3 { font-size: 18px; }
.single-content h4 { font-size: 16px; }
.single-content ul, .single-content ol { margin: 1em 0; padding-left: 1.6em; }
.single-content ul { list-style: disc; }
.single-content ol { list-style: decimal; }
.single-content li { margin: .4em 0; }
.single-content blockquote {
  margin: 1em 0; padding: 10px 16px; border-left: 3px solid var(--primary);
  background: var(--bg); border-radius: 0 8px 8px 0; color: var(--text-2);
}
.single-content code {
  background: var(--code-bg); padding: 2px 6px; border-radius: 4px;
  font-family: "SF Mono", Consolas, monospace; font-size: .88em;
}
.single-content pre {
  background: var(--code-bg); padding: 14px; border-radius: 8px;
  overflow-x: auto; margin: 1em 0; -webkit-overflow-scrolling: touch;
}
.single-content pre code { background: none; padding: 0; }
.single-content img { border-radius: 8px; margin: 1em auto; }
.single-content table { width: 100%; border-collapse: collapse; margin: 1em 0; font-size: 14px; display: block; overflow-x: auto; }
.single-content th, .single-content td { border: 1px solid var(--border); padding: 8px 10px; text-align: left; }
.single-content th { background: var(--bg); }
.single-tags { margin-top: 20px; display: flex; flex-wrap: wrap; gap: 8px; }
.single-tags a { font-size: 13px; padding: 4px 12px; border: 1px solid var(--border); border-radius: 14px; color: var(--text-2); }
.single-tags a:hover { border-color: var(--primary); color: var(--primary); }

/* 目录 */
.toc-box {
  background: var(--bg); border-radius: 8px; padding: 14px 16px; margin: 0 0 18px;
  font-size: 14px;
}
.toc-box > strong { display: block; margin-bottom: 8px; font-size: 15px; }
.toc-box ul { padding-left: 0; }
.toc-box li { margin: 4px 0; }
.toc-box li.toc-h3 { padding-left: 1em; }
.toc-box li.toc-h4 { padding-left: 2em; }
.toc-box a { color: var(--text-2); }
.toc-box a:hover, .toc-box a.active { color: var(--primary); }

/* 相关文章 */
.related-posts { margin-top: 24px; }
.related-posts > h3 { font-size: 17px; margin-bottom: 12px; padding-left: 4px; border-left: 3px solid var(--primary); padding-left: 10px; }
.related-list { display: flex; flex-direction: column; gap: 10px; }

/* ============ 归档/分类页头 ============ */
.archive-header {
  background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 18px; margin-top: 14px; margin-bottom: 4px;
}
.archive-header h1 { font-size: 20px; font-weight: 800; }
.archive-header p { font-size: 13px; color: var(--text-2); margin-top: 6px; }

/* ============ 搜索页 ============ */
.search-header { margin: 14px 0 4px; font-size: 15px; color: var(--text-2); }
.search-header strong { color: var(--primary); }

/* ============ 404 ============ */
.error-404 { text-align: center; padding: 60px 20px; background: var(--card); border-radius: var(--radius); margin-top: 14px; }
.error-404 h1 { font-size: 72px; font-weight: 800; color: var(--primary); }
.error-404 p { color: var(--text-2); margin: 12px 0 20px; }
.btn {
  display: inline-block; padding: 10px 24px; border-radius: 8px;
  background: var(--primary); color: var(--primary-text); font-size: 15px; font-weight: 600;
}
.btn:hover { color: var(--primary-text); opacity: .9; }

/* ============ 页脚 ============ */
.site-footer { margin-top: 30px; border-top: 1px solid var(--border); background: var(--card); }
.footer-inner { max-width: 1080px; margin: 0 auto; padding: 22px 14px; text-align: center; font-size: 13px; color: var(--text-3); }
.footer-inner p { margin: 4px 0; }
.footer-inner a { color: var(--text-2); }
.footer-inner a:hover { color: var(--primary); }
.theme-credit { font-size: 12px; }

/* 回到顶部 */
.back-to-top {
  position: fixed; right: 16px; bottom: 24px; width: 44px; height: 44px;
  border-radius: 50%; border: 1px solid var(--border);
  background: var(--card); color: var(--text-2); font-size: 18px;
  cursor: pointer; box-shadow: var(--shadow); z-index: 150;
  display: none; align-items: center; justify-content: center;
}
.back-to-top.show { display: flex; }

/* ============ PC 端增强（≥768px） ============ */
@media (min-width: 768px) {
  .post-list { gap: 14px; }
  .post-card { padding: 18px; }
  .post-card-thumb { width: 200px; height: 134px; }
  .post-card-title { font-size: 18px; }
  .post-card.featured .post-card-thumb { height: 280px; }
  .single-article { padding: 32px 36px; }
  .single-title { font-size: 28px; }
  /* PC 端双栏：内容 + 侧边目录 */
  .single-layout { display: flex; gap: 20px; align-items: flex-start; }
  .single-layout .single-article { flex: 1; min-width: 0; margin-top: 14px; }
  .single-sidebar { width: 260px; flex-shrink: 0; position: sticky; top: 130px; margin-top: 14px; }
  .single-sidebar .toc-box { margin-bottom: 0; }
  .toc-box { max-height: 60vh; overflow-y: auto; }
}

/* 移动端隐藏 PC 目录（文章内目录已显示） */
@media (max-width: 767px) {
  .single-sidebar { display: none; }
}