.post-detail{max-width:920px;margin:0 auto}.post-detail__header{margin-bottom:var(--spacing-4)}.post-detail__categories{gap:var(--spacing-1);flex-wrap:wrap;margin-bottom:.75rem;display:flex}.post-detail__category{font-size:var(--font-size-xs);background:var(--color-tertiary-400);border-radius:var(--radius-sm);color:var(--color-text-400);padding:.125rem .5rem;text-decoration:none;transition:background .15s}.post-detail__category:hover{background:var(--color-tertiary-500);color:var(--color-text-500)}.post-detail__title{font-size:var(--font-size-3xl);color:var(--color-text-500);margin:0 0 .75rem;font-weight:700;line-height:1.3}.post-detail__perex{font-size:var(--font-size-lg);color:var(--color-text-400);margin:0 0 var(--spacing-2);line-height:1.6}.post-detail__perex a{color:var(--color-conversion-600)}.post-detail__meta{font-size:var(--font-size-sm);color:var(--color-text-400);gap:var(--spacing-2);flex-wrap:wrap;align-items:center;display:flex}.post-detail__meta a{color:var(--color-text-400);text-decoration:none}.post-detail__meta a:hover{color:var(--color-conversion-600)}.post-detail__updated{font-style:italic}.post-detail__featured-image{margin:0 0 var(--spacing-4)}.post-detail__featured-image img{border-radius:var(--radius-md)}.post-detail__figcaption{font-size:var(--font-size-sm);color:var(--color-text-400);margin-top:var(--spacing-1);text-align:center}.post-detail__takeaways{margin-bottom:var(--spacing-4)}.post-detail__faq{margin-top:var(--spacing-6)}.post-detail__section-title{font-size:var(--font-size-2xl);color:var(--color-text-500);margin:0 0 1.25rem;font-weight:600}.post-detail__section-title--sm{font-size:var(--font-size-xl)}.post-detail__author{margin-top:var(--spacing-6);padding:var(--spacing-3);background:var(--color-tertiary-300);border-radius:var(--radius-md);gap:var(--spacing-2);align-items:flex-start;display:flex}.post-detail__author-avatar{border-radius:var(--radius-full);object-fit:cover;flex-shrink:0;width:64px;height:64px}.post-detail__author-name{margin-bottom:.25rem;font-weight:600}.post-detail__author-name a{color:inherit;text-decoration:none}.post-detail__author-name a:hover{color:var(--color-conversion-600)}.post-detail__author-role{font-size:var(--font-size-sm);color:var(--color-text-400);margin-bottom:.25rem}.post-detail__author-expertise{font-size:var(--font-size-xs);color:var(--color-text-400)}.post-detail__author-social{gap:var(--spacing-2);margin-top:.5rem;display:flex}.post-detail__author-social a{font-size:var(--font-size-xs);color:var(--color-conversion-600);border:1px solid var(--color-tertiary-500);border-radius:var(--radius-sm);padding:.125rem .5rem;text-decoration:none;transition:background .15s}.post-detail__author-social a:hover{background:var(--color-tertiary-400)}.post-detail__share{margin-top:var(--spacing-6);padding-top:var(--spacing-4);border-top:1px solid var(--color-tertiary-300)}.post-detail__related{margin-top:var(--spacing-6)}.post-detail__related-grid{gap:var(--spacing-2);grid-template-columns:repeat(3,1fr);display:grid}.post-detail__related-card{border:1px solid var(--color-tertiary-500);border-radius:var(--radius-md);color:var(--color-text-500);flex-direction:column;text-decoration:none;transition:border-color .15s,box-shadow .15s;display:flex;overflow:hidden}.post-detail__related-card:hover{border-color:var(--color-conversion-500);box-shadow:var(--shadow-sm)}.post-detail__related-image{aspect-ratio:4/3;overflow:hidden}.post-detail__related-image img{object-fit:cover;width:100%;height:100%;transition:transform .3s}.post-detail__related-card:hover .post-detail__related-image img{transform:scale(1.03)}.post-detail__related-body{flex-direction:column;gap:.375rem;padding:.75rem;display:flex}.post-detail__related-title{font-size:var(--font-size-sm);-webkit-line-clamp:2;-webkit-box-orient:vertical;margin:0;font-weight:600;line-height:1.35;display:-webkit-box;overflow:hidden}.post-detail__related-excerpt{font-size:var(--font-size-xs);color:var(--color-text-400);-webkit-line-clamp:2;-webkit-box-orient:vertical;margin:0;line-height:1.45;display:-webkit-box;overflow:hidden}.post-detail__related-date{font-size:var(--font-size-xs);color:var(--color-text-300)}@media (max-width:640px){.post-detail__title{font-size:var(--font-size-2xl)}.post-detail__meta{gap:var(--spacing-1)}.post-detail__author{text-align:center;flex-direction:column;align-items:center}.post-detail__related-grid{grid-template-columns:1fr}}.reading-progress{z-index:9999;pointer-events:none;background:0 0;width:100%;height:3px;position:fixed;top:0;left:0}.reading-progress__bar{background:var(--color-conversion-600);height:100%;transition:width .1s linear}.toc{margin-bottom:var(--spacing-4);padding:var(--spacing-3);background:var(--color-tertiary-300);border-radius:var(--radius-md);border-left:3px solid var(--color-conversion-600)}.toc__label{font-size:var(--font-size-sm);color:var(--color-text-500);text-transform:uppercase;letter-spacing:.03em;margin-bottom:.75rem;font-weight:600}.toc__list{margin:0;padding:0;list-style:none}.toc__item{margin-bottom:.375rem}.toc__item--nested{padding-left:1.25rem}.toc__link{font-size:var(--font-size-sm);color:var(--color-text-400);line-height:1.4;text-decoration:none;transition:color .15s;display:inline-block}.toc__number{color:var(--color-text-300);font-size:var(--font-size-xs);min-width:1.25em;margin-right:.35em}.toc__link:hover{color:var(--color-conversion-600)}.toc__item--active .toc__link{color:var(--color-conversion-600);font-weight:600}.share-btn{font-size:var(--font-size-sm);color:var(--color-text-400);border:1px solid var(--color-tertiary-500);border-radius:var(--radius-sm);cursor:pointer;background:0 0;align-items:center;gap:.375rem;padding:.375rem .75rem;font-family:inherit;transition:all .15s;display:inline-flex}.share-btn:hover{border-color:var(--color-conversion-500);color:var(--color-conversion-600)}.share-btn svg{flex-shrink:0}.post-detail__meta-row{justify-content:space-between;align-items:center;gap:var(--spacing-1);flex-wrap:wrap;display:flex}@media (max-width:640px){.toc{margin-bottom:var(--spacing-3);padding:var(--spacing-2)}.post-detail__meta-row{flex-direction:column;align-items:flex-start}}