.books-page{display:flex;gap:2rem;color:var(--text-primary)}.books-sidebar{width:12rem;flex-shrink:0}.books-sidebar-sticky{position:sticky;top:2rem}.books-filter-title{font-size:.875rem;font-weight:500;color:var(--text-secondary);margin-bottom:1rem}.books-filter-list{display:flex;flex-direction:column;gap:.5rem}.books-filter-button{width:100%;text-align:left;padding:.25rem .5rem;font-size:.875rem;border-radius:.375rem;transition:all .15s;background:transparent;border:none;cursor:pointer;color:var(--text-secondary)}.books-filter-button.active,.books-filter-button:hover{background-color:var(--sidebar-border)}.books-filter-button.active{color:var(--accent);font-weight:500}.books-main{flex:1;min-width:0;max-width:900px;display:flex;flex-direction:column;gap:2rem}.books-header{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:1rem}.books-title{font-size:2rem;font-weight:700;line-height:1.3;letter-spacing:-.03em;color:var(--text-primary);margin:0}.books-count{font-size:.875rem;color:var(--text-secondary);background-color:var(--sidebar-border);padding:.25rem .5rem;border-radius:.25rem;white-space:nowrap}.books-intro{font-size:1.125rem;line-height:1.75;letter-spacing:-.011em;color:var(--text-primary);margin:0}.books-intro u{text-decoration:underline;text-underline-offset:2px}.books-list{display:flex;flex-direction:column;gap:1rem}.book-card{padding-bottom:1rem;border-bottom:1px solid var(--sidebar-border)}.book-card:last-child{border-bottom:none;padding-bottom:0}.book-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:.5rem}.book-title-link{font-size:1.5rem;font-weight:600;line-height:1.4;letter-spacing:-.02em;color:var(--accent);text-decoration:underline;text-underline-offset:2px;transition:color .15s}.book-title-link:hover{color:var(--accent-hover)}.book-year{font-size:.75rem;color:var(--text-secondary);background-color:var(--sidebar-border);padding:.25rem .5rem;border-radius:.25rem;white-space:nowrap}.book-footer{display:flex;align-items:center;justify-content:space-between}.book-author{font-size:1.125rem;line-height:1.75;letter-spacing:-.011em;color:var(--text-primary);margin:0}.book-topics{display:flex;gap:.5rem;flex-wrap:wrap}.book-topic{font-size:.75rem;padding:.125rem .5rem;background-color:var(--sidebar-border);color:var(--text-secondary);border-radius:9999px;white-space:nowrap}@media (max-width:900px){.books-page{flex-direction:column;gap:2rem}.books-sidebar{width:100%}.books-sidebar-sticky{position:static}.books-filter-list{display:flex;flex-direction:row;flex-wrap:wrap;gap:.5rem}.books-filter-button{width:auto}}