.books-container{min-height:calc(100vh - 14rem)}.animate-pulse{animation:2s cubic-bezier(.4,0,.6,1) infinite pulse}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.skeleton-book-card{background:linear-gradient(90deg,#f3f4f6 25%,#e5e7eb 50%,#f3f4f6 75%) 0 0/200% 100%;animation:1.5s infinite shimmer}@keyframes shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}