/* Breadcrumb */
    .breadcrumb { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; padding: var(--space-md) 0; font-size: .8rem; color: var(--color-muted); }
    .breadcrumb a { color: var(--color-muted); transition: color var(--transition); text-decoration: none; }
    .breadcrumb a:hover { color: var(--color-accent); }
    .breadcrumb-sep { color: var(--color-border); }

    /* Article layout */
    .article-layout { display: grid; grid-template-columns: 1fr; gap: var(--space-2xl); padding-bottom: var(--space-4xl); }
    @media (min-width: 1024px) { .article-layout { grid-template-columns: 1fr 300px; align-items: start; } }

    /* Article hero */
    .article-hero-img { width: 100%; max-height: 460px; object-fit: cover; border-radius: var(--radius-xl); margin-bottom: var(--space-2xl); box-shadow: var(--shadow-lg); }
    .article-cat-badge { display: inline-flex; align-items: center; gap: 6px; background: var(--color-accent-light); color: var(--color-accent-dark); padding: 5px 14px; border-radius: var(--radius-full); font-size: .75rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; margin-bottom: var(--space-md); text-decoration: none; transition: all var(--transition); }
    .article-cat-badge:hover { background: var(--color-accent); color: var(--color-primary); }
    .article-title { font-family: var(--font-display); font-size: clamp(1.75rem, 4vw, 2.75rem); font-weight: 800; color: var(--color-primary); line-height: 1.2; margin-bottom: var(--space-lg); }
    .article-meta { display: flex; align-items: center; gap: var(--space-lg); flex-wrap: wrap; padding: var(--space-md) 0; border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); margin-bottom: var(--space-2xl); }
    .article-meta-item { display: flex; align-items: center; gap: 6px; font-size: .85rem; color: var(--color-muted); }
    .article-meta-item svg { color: var(--color-accent); flex-shrink: 0; }
    .article-meta-item strong { color: var(--color-text); font-weight: 600; }

    /* Prose content */
    .article-body { font-size: 1.05rem; line-height: 1.85; color: var(--color-text); }
    .article-body h2 { font-family: var(--font-display); font-size: 1.6rem; font-weight: 700; color: var(--color-primary); margin: 2.5rem 0 1rem; padding-bottom: .5rem; border-bottom: 3px solid var(--color-accent-light); }
    .article-body h3 { font-family: var(--font-display); font-size: 1.25rem; font-weight: 700; color: var(--color-primary); margin: 2rem 0 .75rem; }
    .article-body p { margin-bottom: 1.4rem; }
    .article-body ul, .article-body ol { margin: 0 0 1.4rem 1.5rem; display: flex; flex-direction: column; gap: .5rem; }
    .article-body ul { list-style: disc; }
    .article-body ol { list-style: decimal; }
    .article-body li { line-height: 1.7; }
    .article-body pre { background: var(--color-primary); color: var(--color-accent); padding: var(--space-lg); border-radius: var(--radius-md); overflow-x: auto; font-size: .875rem; line-height: 1.7; margin: 1.5rem 0; }
    .article-body code { background: var(--color-accent-light); color: var(--color-accent-dark); padding: 2px 7px; border-radius: 4px; font-size: .875em; }
    .article-body pre code { background: none; color: inherit; padding: 0; font-size: inherit; }
    .article-body blockquote { border-left: 4px solid var(--color-accent); padding: var(--space-md) var(--space-lg); margin: 1.5rem 0; background: var(--color-accent-light); border-radius: 0 var(--radius-md) var(--radius-md) 0; font-style: italic; color: var(--color-text-light); }
    .article-body img { border-radius: var(--radius-md); margin: 1.5rem 0; box-shadow: var(--shadow-md); }
    .article-body a { color: var(--color-accent); text-decoration: underline; text-underline-offset: 3px; }
    .article-body a:hover { color: var(--color-accent-dark); }

    /* Share bar */
    .share-bar { display: flex; align-items: center; gap: var(--space-md); flex-wrap: wrap; padding: var(--space-lg); background: var(--color-accent-light); border-radius: var(--radius-lg); margin-top: var(--space-2xl); }
    .share-label { font-weight: 700; font-size: .875rem; color: var(--color-primary); }
    .share-btn { display: inline-flex; align-items: center; gap: 6px; padding: 6px 14px; border-radius: var(--radius-full); font-size: .8rem; font-weight: 700; text-decoration: none; transition: all var(--transition); color: var(--color-white); }
    .share-twitter { background: #1DA1F2; }
    .share-linkedin { background: #0A66C2; }
    .share-facebook { background: #1877F2; }
    .share-btn:hover { opacity: .85; transform: translateY(-1px); }

    /* Author box */
    .author-box { display: flex; gap: var(--space-lg); align-items: flex-start; padding: var(--space-xl); background: var(--color-white); border: 1px solid var(--color-border); border-radius: var(--radius-lg); margin-top: var(--space-2xl); }
    .author-avatar { width: 64px; height: 64px; border-radius: 50%; background: linear-gradient(135deg, var(--color-primary), var(--color-accent)); display: flex; align-items: center; justify-content: center; font-family: var(--font-display); font-size: 1.5rem; font-weight: 700; color: var(--color-white); flex-shrink: 0; }
    .author-name { font-weight: 700; color: var(--color-primary); margin-bottom: 4px; }
    .author-role { font-size: .8rem; color: var(--color-accent); margin-bottom: var(--space-sm); }
    .author-bio { font-size: .875rem; color: var(--color-text-light); line-height: 1.65; }

    /* Sidebar widgets */
    .article-sidebar { display: flex; flex-direction: column; gap: var(--space-lg); }
    .widget-card { background: var(--color-white); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-lg); position: sticky; top: calc(var(--navbar-height) + var(--space-lg)); }
    .widget-title { font-family: var(--font-display); font-size: 1rem; font-weight: 700; color: var(--color-primary); margin-bottom: var(--space-md); padding-bottom: var(--space-sm); border-bottom: 2px solid var(--color-accent-light); }
    .toc-list { list-style: none; display: flex; flex-direction: column; gap: 6px; }
    .toc-list li a { font-size: .85rem; color: var(--color-text-light); text-decoration: none; display: flex; align-items: center; gap: 8px; padding: 5px 8px; border-radius: var(--radius-sm); transition: all var(--transition); }
    .toc-list li a::before { content: 'S'; color: var(--color-accent); font-size: .7rem; }
    .toc-list li a:hover { background: var(--color-accent-light); color: var(--color-accent); }
    .related-item { display: flex; gap: var(--space-md); padding: var(--space-sm) 0; border-bottom: 1px solid var(--color-border); text-decoration: none; transition: all var(--transition); }
    .related-item:last-child { border-bottom: none; }
    .related-item:hover .related-title { color: var(--color-accent); }
    .related-thumb { width: 64px; height: 48px; border-radius: var(--radius-sm); object-fit: cover; flex-shrink: 0; background: linear-gradient(135deg, var(--color-primary), var(--color-accent)); }
    .related-title { font-size: .825rem; font-weight: 600; color: var(--color-primary); line-height: 1.4; }
    .related-date { font-size: .7rem; color: var(--color-muted); margin-top: 3px; }
    .cta-widget { background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light)); color: var(--color-white); text-align: center; padding: var(--space-xl); }
    .cta-widget .widget-title { color: var(--color-accent); border-color: rgba(0,201,167,.3); }
    .cta-widget p { font-size: .875rem; color: rgba(255,255,255,.75); margin-bottom: var(--space-lg); }

    /* Related section bottom */
    .related-section { padding: var(--space-3xl) 0; background: var(--color-bg); }
    .related-grid { display: grid; grid-template-columns: 1fr; gap: var(--space-xl); margin-top: var(--space-2xl); }
    @media (min-width: 640px) { .related-grid { grid-template-columns: repeat(3, 1fr); } }

    /* 404 */
    .not-found-wrap { text-align: center; padding: var(--space-4xl) var(--space-xl); }
    .not-found-icon { font-size: 5rem; margin-bottom: var(--space-xl); }
    .not-found-title { font-family: var(--font-display); font-size: 2.5rem; color: var(--color-primary); margin-bottom: var(--space-md); }
    .not-found-sub { font-size: 1.05rem; color: var(--color-muted); margin-bottom: var(--space-2xl); }

    /* Reading progress */
    #reading-progress { position: fixed; top: var(--navbar-height); left: 0; height: 3px; background: var(--color-accent); width: 0%; z-index: 999; transition: width .1s ease; }