.catalog-toolbar{display:grid;grid-template-columns:1fr 1.1fr;gap:22px;margin:30px 0 16px;padding:22px;background:#eaf3fa;border:1px solid #cbddeb;border-radius:5px}
.catalog-field{display:flex;flex-direction:column;gap:7px;font-size:11px;font-weight:bold;color:#264b69;letter-spacing:.3px}
.catalog-field select,.catalog-search{height:47px;background:white;border:1px solid #b8cede;border-radius:3px;color:var(--ink)}
.catalog-field select{padding:0 35px 0 12px;width:100%;font-size:13px}
.catalog-search{display:flex;align-items:center;padding:0 11px;gap:8px}
.catalog-search input{border:0;background:transparent;min-width:0;width:100%;font-size:13px;color:var(--ink);height:100%}
.catalog-search button{border:0;background:#edf4fa;border-radius:50%;width:25px;height:25px;flex-shrink:0;color:var(--ink);font-size:17px;padding:0}
.catalog-meta{display:flex;justify-content:space-between;gap:18px;align-items:center;margin-bottom:17px}
.catalog-meta .results{margin:0;font-size:11px}.catalog-meta>button{background:none;border:0;color:#1769a5;font-size:11px;white-space:nowrap;padding:7px 0}.catalog-meta>button:disabled{opacity:.5}
.book-catalog{display:flex;flex-direction:column;gap:12px}
.catalog-section,.catalog-section:first-child{padding:0;border:1px solid #cbddeb;background:white;border-radius:5px;overflow:hidden}
.catalog-section>summary{display:flex;align-items:center;gap:17px;padding:20px 22px;list-style:none;transition:background .2s}
.catalog-section>summary:hover{background:#f0f7fc}.catalog-section>summary:after{content:none}.catalog-section>summary::-webkit-details-marker{display:none}
.subject-number{font:22px Georgia,serif;color:#5384a8;border-right:1px solid #d3e1eb;padding-right:17px}
.subject-copy{display:flex;flex-direction:column;gap:4px;flex:1}.subject-copy strong{font:23px/1.2 Georgia,serif;color:#123956}.subject-copy>span{font-size:11px;line-height:1.5;color:#60798b}
.subject-previews{display:flex;padding-left:8px}.subject-previews img{width:42px;height:49px;object-fit:cover;border:2px solid white;border-radius:3px;margin-left:-8px;box-shadow:0 1px 4px #12395620}
.subject-count{font-size:10px;background:#e8f2fa;color:#28597d;padding:5px 10px;border-radius:20px;white-space:nowrap;min-width:58px;text-align:center}
.subject-chevron{font-size:24px;color:#1769a5;transition:transform .2s}.catalog-section[open] .subject-chevron{transform:rotate(180deg)}
.catalog-section[open]>summary{background:#edf5fb;border-bottom:1px solid #d1e1ed}.catalog-section[open] .subject-previews{visibility:hidden}
.book-shelf{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:17px;padding:23px}
.book-card{padding:0;display:flex;flex-direction:column;overflow:hidden;text-align:left;border:1px solid #d3e0e9;border-radius:4px;background:#fff;color:var(--ink);transition:border-color .2s,box-shadow .2s,transform .2s}
.book-card:hover{border-color:#5d92bb;box-shadow:0 7px 18px #143b5e12;transform:translateY(-3px)}
.book-card-cover{height:190px;display:flex;justify-content:center;align-items:center;background:#e8edf1;overflow:hidden}.book-card-cover img{width:100%;height:100%;object-fit:contain}
.book-card-copy{padding:16px;display:flex;flex-direction:column;flex:1;width:100%;gap:9px}.book-kind{font-size:8px;letter-spacing:.8px;text-transform:uppercase;color:#1769a5}.book-card-copy>strong{font:19px/1.23 Georgia,serif}.book-card-subtitle{font-size:10px;line-height:1.4;color:#60798b}.book-card-link{margin-top:auto;border-top:1px solid #d9e5ee;padding-top:11px;display:flex;justify-content:space-between;font-size:10px}
.catalog-empty{padding:28px;border:1px solid #cedeea;background:white;border-radius:4px}.catalog-empty p{color:var(--muted);font-size:13px}.catalog-empty>button{background:none;border:0;color:#1769a5;padding:0}
.book-detail{display:grid;grid-template-columns:160px 1fr;gap:22px;align-items:start;margin-bottom:22px}.book-detail>img{width:100%;border-radius:4px}.book-detail h2{font-size:29px;margin-bottom:8px}.book-subtitle{margin:0 0 14px;font-size:13px}.topic-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:16px}.topic-tags>span{padding:5px 9px;background:#e6f1f9;border-radius:20px;font-size:10px;color:#28597d}
.book-detail-art{width:100%;aspect-ratio:1;display:flex;align-items:center;justify-content:center;background:#d3d3d3;border-radius:4px;overflow:hidden}
.book-detail-art>img{width:100%;height:100%;object-fit:contain}
.pdf-cover-stage{background:linear-gradient(135deg,#dedede,#d0d0d0)}
.pdf-cover-stage>img{width:auto;height:62%;max-width:64%;object-fit:contain;filter:drop-shadow(-8px 8px 8px #0005) drop-shadow(3px 3px 2px #0002)}
@media(max-width:390px){.book-detail-art{width:140px}}
@media(max-width:1050px){.book-shelf{grid-template-columns:repeat(3,minmax(0,1fr))}.subject-copy strong{font-size:21px}.subject-previews{display:none}}
@media(max-width:760px){.catalog-toolbar{grid-template-columns:1fr;gap:16px;padding:17px}.catalog-meta{align-items:start}.catalog-meta .results{max-width:230px}.catalog-section>summary{gap:10px;padding:17px 14px}.subject-number{padding-right:10px;font-size:18px}.subject-copy strong{font-size:19px}.subject-copy>span{font-size:10px}.subject-count{font-size:9px;padding:4px 7px;min-width:48px}.subject-chevron{font-size:21px}.book-shelf{grid-template-columns:repeat(2,minmax(0,1fr));padding:14px;gap:12px}.book-card-cover{height:160px}.book-card-copy{padding:12px}.book-card-copy>strong{font-size:17px}.book-detail{grid-template-columns:115px 1fr;gap:16px}.book-detail h2{font-size:24px}}
@media(max-width:390px){.subject-number{display:none}.book-card-cover{height:140px}.book-detail{grid-template-columns:1fr}.book-detail>img{width:140px}.subject-copy strong{font-size:18px}}
@media(prefers-reduced-motion:reduce){.book-card,.subject-chevron,.catalog-section>summary{transition:none}}