/* ==========================================================
   yzd 的博客：简约样式
   在 Butterfly 主题之上重写配色、排版和组件外观。
   设计原则：纯白底、黑字，只用黑白两色；用细线代替阴影和色块。
   ========================================================== */

:root {
  --paper: #ffffff;
  --ink: #111111;
  --ink-soft: #444444;
  --muted: #8c8c8c;
  --line: #e5e5e5;
  --accent: #111111;
  --accent-soft: rgba(0, 0, 0, .06);
  --serif: "Source Han Serif SC", "Noto Serif CJK SC", "Songti SC", "STSong", "SimSun", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, monospace;

  /* 覆盖主题变量 */
  --global-bg: var(--paper);
  --card-bg: transparent;
  --font-color: var(--ink);
  --card-box-shadow: none;
  --card-hover-box-shadow: none;
  --btn-bg: var(--ink);
  --btn-hover-color: var(--accent);
  --blockquote-bg: transparent;
  --blockquote-color: var(--ink-soft);
  --hr-border: var(--line);
  --toc-link-color: var(--muted);
  --sidebar-bg: var(--paper);
  --search-bg: var(--paper);
  --zoom-bg: var(--paper);
}

[data-theme="dark"] {
  --paper: #0a0a0a;
  --ink: #f2f2f2;
  --ink-soft: #bdbdbd;
  --muted: #7a7a7a;
  --line: #262626;
  --accent: #f2f2f2;
  --accent-soft: rgba(255, 255, 255, .08);
  --global-bg: var(--paper);
  --card-bg: transparent;
  --font-color: var(--ink);
  --btn-bg: #262626;
  --blockquote-bg: transparent;
  --sidebar-bg: var(--paper);
  --search-bg: #141414;
  --zoom-bg: var(--paper);
}

/* ---------- 全局 ---------- */
body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}

a { transition: color .15s ease; }
::selection { background: var(--accent-soft); color: var(--accent); }

/* ---------- 顶部导航：无阴影，底部一条细线 ---------- */
#page-header.not-top-img { margin-bottom: 0; }
#page-header.not-top-img #nav,
#page-header #nav {
  background: var(--paper) !important;
  box-shadow: none !important;
  border-bottom: 1px solid var(--line);
  backdrop-filter: none;
}
#nav #blog-info .site-name {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.15em;
  letter-spacing: .02em;
  color: var(--ink) !important;
  text-shadow: none !important;
}
#nav .menus_items .menus_item .site-page,
#nav #search-button .site-page,
#nav #toggle-menu .site-page {
  color: var(--ink-soft) !important;
  text-shadow: none !important;
  font-size: .72em;
}
#nav .menus_items .menus_item .site-page:hover { color: var(--accent) !important; }
#nav .menus_items .menus_item .site-page::after { background: var(--accent) !important; height: 1px; }
#nav .menus_items .menus_item .site-page i { display: none; }

/* ---------- 版心 ---------- */
#content-inner.layout { max-width: 1120px; padding-top: 48px; padding-bottom: 32px; }
#content-inner > div:first-child { box-shadow: none; }

/* ---------- 侧栏：去掉卡片，只留细线分组 ---------- */
#aside-content .card-widget {
  background: transparent !important;
  box-shadow: none !important;
  border: 0;
  border-radius: 0;
  padding: 0 0 24px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--line);
}
#aside-content .card-widget:last-child { border-bottom: 0; }
#aside-content .item-headline {
  font-size: .78em;
  letter-spacing: .12em;
  color: var(--muted);
  padding-bottom: 8px;
}
#aside-content .item-headline i { display: none; }
#aside-content .item-headline span { margin-left: 0; }
#aside-content .card-info { text-align: left; }
#aside-content .card-info .avatar-img {
  width: 64px; height: 64px; margin: 0 0 12px;
  border: 1px solid var(--line);
}
#aside-content .card-info .author-info-name {
  font-family: var(--serif);
  font-size: 1.3em;
  font-weight: 700;
  text-align: left;
}
#aside-content .card-info .site-data { display: flex; gap: 28px; margin: 12px 0; }
#aside-content .card-info .site-data > a { display: block; text-align: left; }
#aside-content .card-info .site-data .headline { color: var(--muted); font-size: .78em; }
#aside-content .card-info .site-data .length-num { color: var(--ink); font-size: 1.1em; }
#aside-content .card-info .card-info-social-icons { justify-content: flex-start; margin: 4px 0 0; text-align: left; }
#aside-content .card-info .social-icon { margin: 0 12px 0 0; color: var(--ink-soft) !important; font-size: 1.1em; }
#aside-content .card-info .social-icon:hover { color: var(--accent) !important; }

#aside-content .card-category-list { padding-left: 0; }
#aside-content .card-category-list-item a,
#aside-content .card-category-list-link { padding: 4px 0 !important; color: var(--ink-soft); }
#aside-content .card-category-list-count { color: var(--muted); }
#aside-content .card-tag-cloud { padding-left: 0; }
#aside-content .card-category-list-link:hover { background: transparent !important; color: var(--accent); padding-left: 0 !important; }
#aside-content .card-tag-cloud a {
  color: var(--ink-soft) !important;
  font-size: .9em !important;
  margin: 0 12px 6px 0;
  display: inline-block;
}
#aside-content .card-tag-cloud a::before { content: "#"; color: var(--muted); }
#aside-content .card-tag-cloud a:hover { color: var(--accent) !important; }

/* 目录：当前小节用强调色细线标出 */
#aside-content #card-toc .toc-content { border-left: 1px solid var(--line); padding-left: 4px; }
#aside-content #card-toc .toc-content ol { padding-left: 14px; }
#aside-content #card-toc .toc-content .toc-link { color: var(--muted); padding: 1px 8px; border-radius: 0; line-height: 1.7; font-size: .92em; }
#aside-content #card-toc .toc-content .toc-link.active {
  background: transparent !important;
  color: var(--accent) !important;
  font-weight: 700;
  box-shadow: inset 2px 0 0 var(--accent);
}
#aside-content #card-toc .toc-content .toc-link:hover { color: var(--ink); }
#aside-content #card-toc .toc-percentage { display: none; }

/* ---------- 首页：纯文字列表 ---------- */
#recent-posts .recent-post-item {
  background: transparent !important;
  box-shadow: none !important;
  border-radius: 0;
  height: auto !important;
  margin-bottom: 0;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
  animation: none;
}
#recent-posts .recent-post-item:first-child { padding-top: 0; }
#recent-posts .recent-post-item .recent-post-info { width: 100% !important; padding: 0 !important; }
#recent-posts .recent-post-item .article-title {
  font-family: var(--serif);
  font-size: 1.45em;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ink);
  -webkit-line-clamp: 3;
}
#recent-posts .recent-post-item .article-title:hover { color: var(--accent); }
#recent-posts .recent-post-item .article-meta-wrap { color: var(--muted); font-size: .85em; margin: 8px 0 10px; }
#recent-posts .recent-post-item .article-meta-wrap i { display: none; }
#recent-posts .recent-post-item .article-meta-wrap a { color: var(--muted); }
#recent-posts .recent-post-item .article-meta-wrap a:hover { color: var(--accent); }
#recent-posts .recent-post-item .content {
  color: var(--ink-soft);
  line-height: 1.85;
  -webkit-line-clamp: 3;
}

/* 分页 */
#pagination .page-number,
#pagination .extend { background: transparent !important; color: var(--ink-soft) !important; box-shadow: none !important; }
#pagination .page-number.current { color: var(--accent) !important; border-bottom: 1px solid var(--accent); }

/* ---------- 文章页 ---------- */
#post {
  background: transparent !important;
  box-shadow: none !important;
  padding: 0 !important;
}
#post #post-info { margin-bottom: 40px; padding-bottom: 24px; border-bottom: 1px solid var(--line); }
#post #post-info .post-title {
  font-family: var(--serif);
  font-size: 2em;
  font-weight: 700;
  line-height: 1.45;
  color: var(--ink);
  border-bottom: 0;
  padding-bottom: 12px;
  margin-bottom: 0;
}
#post #post-info #post-meta { color: var(--muted); font-size: .85em; }
#post #post-info #post-meta * { font-size: 1em !important; color: var(--muted); }
#post #post-info #post-meta i { display: none; }

#article-container {
  font-size: 1.02em;
  line-height: 1.9;
  color: var(--ink);
}
#article-container h1,
#article-container h2,
#article-container h3,
#article-container h4 {
  font-family: var(--serif);
  color: var(--ink);
  padding-left: 0 !important;
  font-weight: 700;
}
#article-container h1::before,
#article-container h2::before,
#article-container h3::before,
#article-container h4::before { display: none !important; }
#article-container h1 { font-size: 1.45em; line-height: 1.45; margin-top: 0; }
#article-container h2 { font-size: 1.4em; margin-top: 2.2em; padding-bottom: .3em; border-bottom: 1px solid var(--line); }
#article-container h3 { font-size: 1.15em; margin-top: 1.8em; }

#article-container a { color: var(--ink); border-bottom: 1px solid var(--accent); text-decoration: none; }
#article-container a:hover { color: var(--accent); }
#article-container strong { color: var(--ink); }

#article-container blockquote {
  background: transparent;
  border-left: 2px solid var(--accent);
  border-radius: 0;
  padding: 2px 0 2px 18px;
  color: var(--ink-soft);
}

#article-container table {
  display: table;
  width: 100%;
  border: 0;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  border-radius: 0;
  font-size: .94em;
}
#article-container table th,
#article-container table td { border: 0; border-bottom: 1px solid var(--line); padding: 8px 12px; }
#article-container table th { background: transparent !important; font-weight: 700; text-align: left; border-bottom: 1px solid var(--ink); }
#article-container table tr:last-child td { border-bottom: 0; }

#article-container img { border-radius: 2px; box-shadow: none; margin: 1.2em auto .4em; }
#article-container img + em { display: block; text-align: center; color: var(--muted); font-size: .86em; margin-bottom: 1em; }
[data-theme="dark"] #article-container img { filter: brightness(.88); }

#article-container code { background: var(--accent-soft); color: var(--accent); border-radius: 2px; padding: .1em .35em; }
#article-container figure.highlight { box-shadow: none; border: 1px solid var(--line); border-radius: 2px; }
#article-container .katex-display { overflow-x: auto; overflow-y: hidden; padding: 4px 0; }

#article-container hr { border: 0; border-top: 1px solid var(--line); margin: 2.4em 0; }
#article-container hr::before { display: none; }

/* 文章底部：标签和上下篇 */
#post .tag_share { border-top: 1px solid var(--line); padding-top: 16px; margin-top: 40px; }
#post .post-meta__tags { background: transparent !important; border: 0 !important; color: var(--muted) !important; padding: 0 12px 0 0 !important; }
#post .post-meta__tags::before { content: "#"; }
#post .post-meta__tags:hover { color: var(--accent) !important; }
#pagination.pagination-post { background: transparent; border-radius: 0; }
#pagination.pagination-post .pagination-related { background: transparent !important; }
#pagination.pagination-post .cover { display: none; }
#pagination.pagination-post .info-1 .info-item-1 { color: var(--muted); }
#pagination.pagination-post .info-1 .info-item-2 { color: var(--ink); font-family: var(--serif); }

/* ---------- 归档、标签、分类等页面 ---------- */
#page {
  background: transparent !important;
  box-shadow: none !important;
  padding: 0 !important;
}
#page .page-title { font-family: var(--serif); font-size: 1.8em; }
/* 归档：去掉时间轴圆点，改成按年分组的列表 */
.article-sort { border-left: 0; margin-left: 0; padding-left: 0; }
.article-sort-title { font-family: var(--serif); margin-left: 0; padding-left: 0; font-size: 1.6em; }
.article-sort-title::before,
.article-sort-title::after,
.article-sort-item::before { display: none !important; }
.article-sort-item { margin-left: 0; height: auto !important; }
.article-sort-item.year {
  font-family: var(--serif);
  color: var(--muted);
  font-size: 1.1em;
  margin-top: 16px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--line);
}
.article-sort-item-img { display: none; }
.article-sort-item-info { display: flex; align-items: baseline; gap: 20px; padding-left: 0 !important; }
.article-sort-item-time { order: 0; color: var(--muted); font-size: .85em; min-width: 6em; }
.article-sort-item-time i { display: none; }
.article-sort-item-title { order: 1; -webkit-line-clamp: 1; }
.article-sort-item-title { color: var(--ink) !important; }
.article-sort-item-title:hover { color: var(--accent) !important; }
.tag-cloud-list a { background: transparent !important; color: var(--ink-soft) !important; box-shadow: none !important; }
.tag-cloud-list a:hover { color: var(--accent) !important; }

/* ---------- 页脚：透明底 + 细线 ---------- */
#footer {
  background: transparent !important;
  border-top: 1px solid var(--line);
  margin-top: 24px;
}
#footer::before { display: none; }
#footer .footer-other { padding: 28px 16px; }
#footer .footer-other { font-size: .85em; }
#footer .footer-other * { color: var(--muted) !important; }

/* ---------- 右下角按钮：小而安静 ---------- */
#rightside > div > button,
#rightside > div > a {
  background: var(--paper) !important;
  color: var(--ink-soft) !important;
  border: 1px solid var(--line);
  border-radius: 2px;
}
#rightside > div > button:hover,
#rightside > div > a:hover { color: var(--accent) !important; border-color: var(--accent); }

/* ---------- 搜索弹窗 ---------- */
#local-search .search-dialog { border-radius: 2px; box-shadow: 0 12px 40px rgba(0, 0, 0, .12); }
#local-search .search-dialog hr { border-color: var(--line); }
#local-search .search-dialog .local-search-input input { border-color: var(--line); border-radius: 2px; }

/* ---------- 手机 ---------- */
@media (max-width: 900px) {
  #content-inner.layout { padding: 28px 18px; }
  #aside-content { margin-top: 32px; }
  #recent-posts .recent-post-item:last-child { border-bottom: 1px solid var(--ink); }
}
@media (max-width: 768px) {
  #post #post-info .post-title { font-size: 1.5em; }
  #article-container h1 { font-size: 1.25em; }
  #recent-posts .recent-post-item .article-title { font-size: 1.25em; }
  #article-container table { display: block; overflow-x: auto; }
}

/* 细节修正：覆盖主题里优先级更高的规则 */
#article-container table thead { background: transparent !important; }
#aside-content .card-info .card-info-social-icons .social-icon { margin: 0 12px 0 0; }
#aside-content .card-tag-cloud a { padding: 0 !important; }

/* ---------- 关于页 ---------- */
.about-card { display: flex; align-items: center; gap: 24px; padding-bottom: 28px; margin-bottom: 28px; border-bottom: 1px solid var(--line); }
#article-container .about-card img.about-avatar { width: 88px; height: 88px; margin: 0; border-radius: 50%; border: 1px solid var(--line); flex: 0 0 auto; }
.about-name { font-family: var(--serif); font-size: 1.6em; font-weight: 700; line-height: 1.3; }
.about-motto { color: var(--muted); font-family: var(--serif); margin: 4px 0 8px; line-height: 1.6; }
#article-container .about-links a { margin-right: 16px; font-size: .92em; }
.about-timeline { margin: .4em 0 1em; }
.about-row { display: flex; gap: 24px; padding: 8px 0; border-bottom: 1px solid var(--line); }
.about-row:last-child { border-bottom: 0; }
.about-time { color: var(--muted); min-width: 7.5em; font-variant-numeric: tabular-nums; }
.about-closing { margin-top: 2.4em; color: var(--muted); font-family: var(--serif); font-style: italic; }
@media (max-width: 768px) {
  .about-card { flex-direction: column; align-items: flex-start; gap: 14px; }
  .about-row { flex-direction: column; gap: 2px; }
}
#recent-posts .recent-post-item .article-title { color: var(--ink) !important; }