/* Single Post CSS */
.single-header { max-width: 800px; margin: 0 auto; text-align: center; }
.single-title { font-size: clamp(1.75rem, 4vw, 2.75rem); font-weight: 800; line-height: 1.2; margin-bottom: 24px; color: var(--color-primary-dark); }
.single-meta { display: flex; justify-content: center; align-items: center; gap: 24px; padding-bottom: 24px; border-bottom: 1px solid var(--color-border); }
.author-info { display: flex; align-items: center; gap: 12px; text-align: left; }
.author-info img { border-radius: 50%; }

.single-featured-img { margin: 40px 0; border-radius: 24px; overflow: hidden; box-shadow: var(--shadow-md); }
.single-featured-img img { width: 100%; height: auto; display: block; }

.single-layout { display: grid; grid-template-columns: 1fr 340px; gap: 48px; }

/* Entry Content Typography */
.entry-content { font-size: 17px; line-height: 1.8; color: var(--color-text); }
.entry-content > * { margin-bottom: 1.5em; }
.entry-content h2 { font-size: 1.75rem; margin: 2em 0 1em; color: var(--color-primary-dark); scroll-margin-top: calc(var(--header-height) + 24px); }
.entry-content h3 { font-size: 1.25rem; margin: 1.5em 0 1em; }
.entry-content img { border-radius: 12px; box-shadow: var(--shadow-sm); }
.entry-content ul, .entry-content ol { padding-left: 24px; }
.entry-content li { margin-bottom: 0.5em; }
.entry-content blockquote { padding: 24px; background: var(--color-bg-light); border-left: 4px solid var(--color-primary); border-radius: 0 12px 12px 0; font-size: 1.1em; font-style: italic; color: var(--color-text-secondary); margin: 2em 0; }
.entry-content pre { background: #1A1A1A; color: #E5E3DE; padding: 20px; border-radius: 12px; overflow-x: auto; font-family: monospace; font-size: 14px; }
.entry-content code { background: var(--color-bg-light); padding: 2px 6px; border-radius: 4px; font-family: monospace; font-size: 0.9em; color: var(--color-primary-dark); }

/* Custom Elements */
.callout-box { background: rgba(27,94,56,0.05); border: 1px solid rgba(27,94,56,0.1); border-radius: 16px; padding: 24px; display: flex; gap: 16px; margin: 2em 0; }
.callout-icon { font-size: 24px; }
.callout-content strong { display: block; font-size: 18px; margin-bottom: 12px; color: var(--color-primary-dark); }
.callout-content ul { list-style: none; padding: 0; margin: 0; }
.callout-content li { display: flex; align-items: flex-start; gap: 8px; }
.callout-content li::before { content: '✓'; color: var(--color-primary); font-weight: bold; }

/* TOC Sidebar */
.single-sidebar { position: relative; }
.toc-sidebar { position: sticky; top: calc(var(--header-height) + 24px); }
.toc-box { background: white; border-radius: 16px; padding: 24px; box-shadow: var(--shadow-sm); border-left: 4px solid var(--color-primary-dark); }
.toc-box__title { display: flex; justify-content: space-between; align-items: center; font-size: 16px; font-weight: 700; margin-bottom: 16px; cursor: pointer; }
.toc-list { list-style: none; padding: 0; margin: 0; }
.toc-list li { margin-bottom: 12px; }
.toc-list a { display: block; font-size: 14px; color: var(--color-text-secondary); transition: all var(--transition-fast); }
.toc-list a:hover, .toc-list a.is-active { color: var(--color-primary); font-weight: 600; }
.share-box { margin-top: 24px; padding-top: 24px; border-top: 1px solid var(--color-border); }

/* Related Posts */
.related-posts { padding: 60px 0; margin-top: 60px; }
.related-posts h2 { margin-bottom: 32px; font-size: 24px; }

@media (max-width: 1024px) {
    .single-layout { grid-template-columns: 1fr; }
    .toc-sidebar { position: static; margin-bottom: 40px; }
}