.author-section{padding:var(--spacing-xxl) 0}.author-profile{display:flex;align-items:center;gap:var(--spacing-xl);margin-bottom:var(--spacing-xl)}.author-image{width:150px;height:150px;border-radius:50%;object-fit:cover}.author-info h1{margin-bottom:var(--spacing-sm);color:var(--color-text)}.author-bio{font-size:1.1rem;line-height:1.6;color:var(--color-text-light);margin-bottom:var(--spacing-md)}.book-showcase{background-color:var(--color-bg-secondary);padding:var(--spacing-xl);border-radius:8px;margin:var(--spacing-xl) 0;box-shadow:var(--shadow-subtle),var(--shadow-dynamic-tier2)}.book-details{display:flex;gap:var(--spacing-lg);align-items:flex-start}.book-cover{flex-shrink:0}.book-cover img{width:200px;height:auto;border-radius:8px;box-shadow:0 4px 12px #0000001a,var(--shadow-dynamic-tier2)}.book-info h2{margin-bottom:var(--spacing-md);color:var(--color-text)}.book-description{color:var(--color-text-light);line-height:1.6;margin-bottom:var(--spacing-md)}.book-links{display:flex;gap:var(--spacing-md);flex-wrap:wrap}.book-link{display:inline-block;padding:var(--spacing-sm) var(--spacing-md);background-color:var(--color-primary);color:#fff;text-decoration:none;border-radius:4px;transition:var(--transition);box-shadow:var(--shadow-subtle),var(--shadow-dynamic-tier1)}.book-link:hover{background-color:var(--color-primary-dark)}.expertise-highlights{margin-top:var(--spacing-xl)}.expertise-highlights h2{margin-bottom:var(--spacing-lg);color:var(--color-text)}.expertise-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:var(--spacing-md)}.expertise-item{background-color:var(--color-bg-secondary);padding:var(--spacing-md);border-radius:8px;border-left:4px solid var(--color-primary);box-shadow:var(--shadow-subtle),var(--shadow-dynamic-tier1)}.expertise-item h3{margin-bottom:var(--spacing-sm);color:var(--color-text)}.expertise-item p{color:var(--color-text-light);line-height:1.5}@media (max-width: 768px){.author-profile,.book-details{flex-direction:column;text-align:center}.book-cover img{width:150px}.expertise-list{grid-template-columns:1fr}}