/* Post hero accent */
  .post-hero-accent {
    background:
      radial-gradient(ellipse at 20% 50%, rgba(13, 148, 136, 0.04) 0%, transparent 60%),
      radial-gradient(ellipse at 80% 50%, rgba(20, 184, 166, 0.03) 0%, transparent 60%);
  }

  /* Share dropdown transition */
  .share-dropdown {
    transition: opacity 0.2s ease, transform 0.2s ease;
  }

  /* Post content typography */
  #ai_post .content-body {
    font-size: 16px;
    line-height: 1.8;
    color: #374151;
  }
  @media (min-width: 768px) {
    #ai_post .content-body { font-size: 17px; }
  }
  #ai_post .content-body h1,
  #ai_post .content-body h2,
  #ai_post .content-body h3,
  #ai_post .content-body h4 {
    color: #111827;
    margin-top: 2em;
    margin-bottom: 0.75em;
  }
  #ai_post .content-body h2 { font-size: 1.75em; }
  #ai_post .content-body h3 { font-size: 1.4em; }
  #ai_post .content-body p { margin-bottom: 1.5em; }
  #ai_post .content-body a { color: var(--brand-primary); text-decoration: underline; text-underline-offset: 2px; }
  #ai_post .content-body a:hover { opacity: 0.8; }
  #ai_post .content-body blockquote {
    border-left: 3px solid var(--brand-primary);
    padding-left: 1.25em;
    margin: 2em 0;
    color: #6B7280;
    font-style: italic;
  }
  #ai_post .content-body img {
    border-radius: 12px;
    margin: 2em 0;
  }
  #ai_post .content-body pre {
    background: #F9FAFB;
    border: 1px solid #E5E7EB;
    border-radius: 10px;
    padding: 1.25em;
    overflow-x: auto;
    margin: 2em 0;
    font-size: 0.875em;
  }
  #ai_post .content-body code {
    background: #F3F4F6;
    padding: 0.15em 0.4em;
    border-radius: 4px;
    font-size: 0.9em;
  }
  #ai_post .content-body pre code {
    background: none;
    padding: 0;
    border-radius: 0;
    font-size: inherit;
  }
  #ai_post .content-body ul, #ai_post .content-body ol {
    padding-left: 1.5em;
    margin-bottom: 1.5em;
  }
  #ai_post .content-body li { margin-bottom: 0.5em; }
  #ai_post .content-body hr {
    border: none;
    border-top: 1px solid #E5E7EB;
    margin: 3em 0;
  }
  #ai_post .content-body figure {
    margin: 2em 0;
  }
  #ai_post .content-body figcaption {
    text-align: center;
    font-size: 0.875em;
    color: #9CA3AF;
    margin-top: 0.75em;
  }

  /* Related posts hover */
  #ai_post .post-item:hover .post-title { color: var(--brand-primary); }

  /* Content title */
  .content-title { font-family: var(--font-heading); }

  /* Content tree article mode */
  #ai_post.is-content-tree .content-tree-doc-header {
    background: #fff;
    border-bottom: 1px solid #e5e7eb;
    padding: 8rem 1rem 3.5rem;
  }
  #ai_post .content-tree-doc-header-inner {
    max-width: 820px;
    margin: 0 auto;
    text-align: center;
  }
  #ai_post .content-tree-doc-breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    margin-bottom: 1.25rem;
    font-size: 0.78rem;
    font-weight: 600;
    color: #64748b;
  }
  #ai_post .content-tree-doc-breadcrumb a {
    color: #64748b;
    text-decoration: none;
  }
  #ai_post .content-tree-doc-breadcrumb a:hover { color: var(--brand-primary); }
  #ai_post .content-tree-doc-breadcrumb .crumb-current { color: #111827; }
  #ai_post .content-tree-doc-breadcrumb .crumb-sep { color: #cbd5e1; }
  #ai_post .content-tree-doc-eyebrow {
    color: var(--brand-primary);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    margin-bottom: 0.85rem;
    text-transform: uppercase;
  }
  #ai_post .content-tree-doc-title {
    color: #111827;
    font-family: var(--font-heading);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.08;
    margin: 0;
  }
  #ai_post .content-tree-doc-excerpt {
    color: #64748b;
    font-size: 1.05rem;
    line-height: 1.7;
    margin: 1rem auto 0;
    max-width: 720px;
  }
  #ai_post .content-tree-doc-updated {
    color: #94a3b8;
    font-size: 0.88rem;
    margin-top: 1rem;
  }
  #ai_post .content-tree-doc-layout-wrap {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 1rem;
  }
  #ai_post .content-tree-doc-layout {
    display: grid;
    gap: 2rem;
    grid-template-columns: minmax(0, 220px) minmax(0, 1fr) minmax(0, 220px);
    align-items: start;
  }
  #ai_post .content-tree-doc-sidebar,
  #ai_post .content-tree-doc-toc {
    position: sticky;
    top: 6rem;
    padding-top: 3rem;
  }
  #ai_post .content-tree-doc-main {
    min-width: 0;
  }
  #ai_post .content-tree-sidebar-label,
  #ai_post .content-tree-toc-label {
    color: #64748b;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    margin: 0 0 0.8rem;
    text-transform: uppercase;
  }
  #ai_post .content-tree-sidebar-nav ul,
  #ai_post .content-tree-toc ul {
    list-style: none;
    margin: 0;
    padding: 0;
  }
  #ai_post .content-tree-sidebar-nav li,
  #ai_post .content-tree-toc li {
    margin: 0;
  }
  #ai_post .content-tree-sidebar-nav a,
  #ai_post .content-tree-toc a {
    border-radius: 8px;
    color: #64748b;
    display: block;
    font-size: 0.9rem;
    line-height: 1.45;
    padding: 0.45rem 0.6rem;
    text-decoration: none;
  }
  #ai_post .content-tree-sidebar-nav a:hover,
  #ai_post .content-tree-toc a:hover,
  #ai_post .content-tree-sidebar-nav a.is-current {
    background: var(--brand-light);
    color: var(--brand-primary);
  }
  #ai_post .content-tree-toc-sub a {
    font-size: 0.84rem;
    padding-left: 1.2rem;
  }
  #ai_post .content-tree-content {
    margin: 0 auto;
    max-width: 760px;
  }
  #ai_post .content-tree-prevnext {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
    margin: 0 auto 4rem;
    max-width: 760px;
  }
  #ai_post .content-tree-prevnext-link {
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    display: block;
    padding: 1rem;
    text-decoration: none;
    transition: border-color .15s ease, box-shadow .15s ease, transform .15s ease;
  }
  #ai_post .content-tree-prevnext-link:hover {
    border-color: var(--brand-accent);
    box-shadow: 0 8px 20px rgba(15,23,42,.06);
    transform: translateY(-1px);
  }
  #ai_post .content-tree-next { text-align: right; }
  #ai_post .content-tree-prevnext-dir {
    color: #64748b;
    display: block;
    font-size: 0.74rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
  }
  #ai_post .content-tree-prevnext-title {
    color: #111827;
    display: block;
    font-size: 0.95rem;
    font-weight: 700;
    line-height: 1.4;
    margin-top: 0.35rem;
  }
  @media (max-width: 1100px) {
    #ai_post .content-tree-doc-layout {
      grid-template-columns: minmax(0, 1fr);
    }
    #ai_post .content-tree-doc-sidebar,
    #ai_post .content-tree-doc-toc {
      position: static;
      padding-top: 0;
    }
    #ai_post .content-tree-doc-sidebar { order: 1; }
    #ai_post .content-tree-doc-main { order: 2; }
    #ai_post .content-tree-doc-toc { order: 3; }
  }
  @media (max-width: 640px) {
    #ai_post.is-content-tree .content-tree-doc-header {
      padding-top: 7rem;
    }
    #ai_post .content-tree-prevnext {
      grid-template-columns: 1fr;
    }
    #ai_post .content-tree-next {
      text-align: left;
    }
  }

.tag-hero-accent,
  .content-tree-hero-accent {
    background:
      radial-gradient(ellipse at 20% 50%, rgba(13, 148, 136, 0.05) 0%, transparent 60%),
      radial-gradient(ellipse at 80% 50%, rgba(20, 184, 166, 0.03) 0%, transparent 60%);
  }
  .tag-name { font-family: var(--font-heading); }
  #ai_tag .post-item { position: relative; }
  #ai_tag .post-link { position: absolute; inset: 0; z-index: 10; }
  #ai_tag .post-tag { position: relative; z-index: 20; }
  #ai_tag .post-item:hover .post-title { color: var(--brand-primary); }
  #ai_tag .load-more-btn:hover { border-color: var(--brand-accent); color: var(--brand-primary); }

  #ai_tag .content-tree-breadcrumb:empty { display: none; }
  #ai_tag .content-tree-breadcrumb a { color: #6b7280; transition: color .15s ease; }
  #ai_tag .content-tree-breadcrumb a:hover { color: var(--brand-primary); }
  #ai_tag .content-tree-breadcrumb .crumb-current { color: #111827; }
  #ai_tag .content-tree-breadcrumb .crumb-sep { color: #cbd5e1; }
  #ai_tag .content-tree-search-icon { position: absolute; left: 16px; top: 50%; transform: translateY(-50%); color: #94a3b8; pointer-events: none; z-index: 2; }
  #ai_tag .content-tree-search-input {
    width: 100%;
    padding: 14px 16px 14px 46px;
    border-radius: 12px;
    background: #fff;
    border: 1px solid #e5e7eb;
    color: #0f172a;
    font-size: 0.95rem;
    outline: none;
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.06);
    transition: box-shadow .2s ease, border-color .2s ease;
  }
  #ai_tag .content-tree-search-input:focus { border-color: var(--brand-accent); box-shadow: 0 0 0 3px rgba(20, 184, 166, 0.18); }
  #ai_tag .content-tree-category-card { min-height: 180px; padding-bottom: 2.75rem; }
  #ai_tag .content-tree-category-icon,
  #ai_tag .content-tree-post-icon {
    display: inline-flex; align-items: center; justify-content: center;
    width: 42px; height: 42px; border-radius: 12px;
    background: var(--brand-light); color: var(--brand-primary);
  }
  #ai_tag .content-tree-category-icon svg,
  #ai_tag .content-tree-post-icon svg { width: 21px; height: 21px; }
  #ai_tag .content-tree-arrow { position: absolute; right: 18px; bottom: 16px; color: #cbd5e1; transition: transform .15s ease, color .15s ease; }
  #ai_tag .content-tree-post-card .content-tree-arrow { position: static; }
  #ai_tag .content-tree-category-card:hover .content-tree-arrow,
  #ai_tag .content-tree-post-card:hover .content-tree-arrow { color: var(--brand-primary); transform: translateX(3px); }
  #ai_tag .content-tree-category-card:hover .block.text-lg,
  #ai_tag .content-tree-post-card:hover .content-tree-post-title { color: var(--brand-primary); }
  #ai_tag .content-tree-post-title { color: #111827; font-size: 1rem; }
  #ai_tag .content-tree-post-excerpt {
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
  }
  #ai_tag .content-tree-filter-hidden { display: none !important; }
  @media (max-width: 767px) {
    #ai_tag .content-tree-category-card { min-height: 0; }
  }

.author-hero-accent {
    background:
      radial-gradient(ellipse at 30% 40%, rgba(13, 148, 136, 0.05) 0%, transparent 55%),
      radial-gradient(ellipse at 70% 60%, rgba(139, 92, 246, 0.03) 0%, transparent 55%);
  }
  .author-name { font-family: var(--font-heading); }
  #ai_author .post-item { position: relative; }
  #ai_author .post-link { position: absolute; inset: 0; z-index: 10; }
  #ai_author .post-tag { position: relative; z-index: 20; }
  #ai_author .post-item:hover .post-title { color: var(--brand-primary); }
  #ai_author .load-more-btn:hover { border-color: var(--brand-accent); color: var(--brand-primary); }