.sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}

.books-page{--section-pad:clamp(3.8rem,7vw,6.5rem);--side-pad:clamp(1.15rem,7vw,7.5rem);background:var(--paper)}
.books-hero{position:relative;isolation:isolate;display:grid;grid-template-columns:minmax(0,1.05fr) minmax(320px,.95fr);gap:clamp(2rem,6vw,6rem);align-items:center;padding:clamp(4rem,8vw,7rem) var(--side-pad);background:linear-gradient(135deg,#061726,#0b2d49);color:#fff;overflow:hidden}
.books-hero::after{content:"";position:absolute;z-index:-1;width:460px;height:460px;border:1px solid rgba(215,173,91,.3);border-radius:50%;inset-inline-end:-150px;top:-190px}
.books-hero-copy{max-width:790px}.books-kicker{margin:0 0 .55rem;color:var(--gold);font-weight:700;letter-spacing:.04em;text-transform:uppercase;font-size:.88rem}.books-hero h1{font-size:clamp(2.45rem,5.6vw,5.7rem);line-height:1.06;margin:.35rem 0 1.25rem;max-width:900px}.books-hero p{font-size:clamp(1rem,1.25vw,1.22rem);color:#dce7ee;max-width:760px}.hero-image-frame{position:relative}.hero-image-frame img{width:100%;aspect-ratio:3/2;object-fit:cover;border:1px solid rgba(215,173,91,.7);box-shadow:0 28px 70px rgba(0,0,0,.35)}.hero-image-frame::before{content:"";position:absolute;inset:-14px 14px 14px -14px;border:1px solid var(--gold);z-index:-1}
.books-section{padding:var(--section-pad) var(--side-pad)}.books-section.white{background:#fff}.books-section.navy{background:var(--navy);color:#fff}.section-heading{max-width:950px;margin-bottom:2rem}.section-heading h2{font-size:clamp(2rem,4vw,4rem);line-height:1.16;margin:.35rem 0 1rem;color:var(--navy)}.navy .section-heading h2{color:#fff}.section-heading p{font-size:1.05rem;color:#52616c}.navy .section-heading p{color:#cbd7de}.documentation-note{margin-top:1.3rem;padding:1rem 1.1rem;border-inline-start:4px solid var(--gold);background:#fff8e8;color:#5a4a27;font-size:.92rem}
.intro-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(320px,.72fr);gap:clamp(2rem,6vw,5rem);align-items:center}.intro-copy p{font-size:1.06rem;margin:0 0 1rem}.intro-image{width:100%;aspect-ratio:5/4;object-fit:cover;border:1px solid #cfc8b8;box-shadow:0 20px 55px rgba(7,27,46,.15)}
.book-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1rem;margin-top:2rem}.book-stat{background:#fff;border:1px solid #d8d4ca;border-top:5px solid var(--gold);padding:1.25rem;min-height:145px}.book-stat strong{display:block;color:var(--navy);font-size:clamp(2.1rem,4vw,3.5rem);line-height:1}.book-stat span{display:block;margin-top:.65rem;color:#4e5c66}
.series-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1.25rem}.series-card{background:#fff;color:var(--ink);border:1px solid rgba(255,255,255,.18);overflow:hidden;display:flex;flex-direction:column}.series-covers{display:grid;grid-template-columns:repeat(3,1fr);gap:2px;background:#d8d8d8;height:210px}.series-covers img{width:100%;height:100%;object-fit:cover;object-position:center}.series-card-content{padding:1.3rem;display:flex;flex-direction:column;flex:1}.series-card h3{margin:.2rem 0 .75rem;color:var(--navy);font-size:1.35rem;line-height:1.3}.series-card p{color:#53616b}.series-link{margin-top:auto;align-self:flex-start;border:0;background:var(--navy);color:#fff;min-height:44px;padding:.7rem 1rem;cursor:pointer;font-weight:700}
.books-tools{position:sticky;top:74px;z-index:30;background:rgba(245,242,234,.96);backdrop-filter:blur(10px);border-block:1px solid #d7d2c6;padding:1rem var(--side-pad)}.books-tools-inner{max-width:1600px;margin:auto;display:grid;grid-template-columns:minmax(240px,430px) 1fr;gap:1rem;align-items:center}.book-search{position:relative}.book-search input{width:100%;min-height:50px;border:1px solid #9ca9b2;background:#fff;padding:.75rem 1rem;border-radius:.25rem;color:var(--ink)}.filter-buttons{display:flex;gap:.55rem;flex-wrap:wrap;justify-content:flex-end}.filter-button{min-height:44px;border:1px solid #9aa5ad;background:#fff;color:var(--navy);padding:.55rem .82rem;border-radius:999px;cursor:pointer;font-weight:600}.filter-button[aria-pressed="true"]{background:var(--navy);color:#fff;border-color:var(--navy)}.results-count{grid-column:1/-1;margin:0;color:#5c6870;font-size:.9rem}
.books-catalogue{padding-top:2.8rem}.catalogue-group{margin-bottom:4.5rem}.catalogue-group-heading{display:flex;align-items:end;justify-content:space-between;gap:1rem;border-bottom:1px solid #cfc9bb;padding-bottom:1rem;margin-bottom:1.5rem}.catalogue-group-heading h2{font-size:clamp(1.8rem,3vw,3rem);margin:0;color:var(--navy)}.catalogue-group-heading p{margin:0;color:#65717a}.books-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1.25rem}.book-card{display:flex;flex-direction:column;background:#fff;border:1px solid #d7d4cb;border-top:5px solid var(--gold);box-shadow:0 8px 25px rgba(7,27,46,.06);min-width:0;transition:transform .18s ease,box-shadow .18s ease}.book-card:hover{transform:translateY(-4px);box-shadow:0 18px 42px rgba(7,27,46,.13)}.book-card[hidden]{display:none}.book-cover-button{display:block;width:100%;border:0;padding:0;background:#eef1f2;cursor:pointer}.book-cover-button img{display:block;width:100%;aspect-ratio:16/11;object-fit:contain;background:#f4f4f2}.book-card-body{padding:1.15rem;display:flex;flex-direction:column;flex:1}.book-badges{display:flex;gap:.45rem;flex-wrap:wrap;margin-bottom:.7rem}.book-badge{font-size:.75rem;font-weight:700;border-radius:999px;background:#e9eef1;color:var(--navy);padding:.28rem .58rem}.book-badge.gold{background:#f7eacb}.book-card h3{font-size:1.18rem;line-height:1.35;margin:.15rem 0 .7rem;color:var(--navy);overflow-wrap:anywhere}.book-card-description{color:#56646e;font-size:.94rem;margin:0 0 1rem}.book-meta{list-style:none;padding:0;margin:auto 0 1rem;display:grid;gap:.35rem;font-size:.88rem;color:#56626b}.book-meta b{color:var(--ink)}.book-actions{display:flex;gap:.55rem;flex-wrap:wrap}.book-action{display:inline-flex;align-items:center;justify-content:center;min-height:44px;border:1px solid var(--navy);background:var(--navy);color:#fff;padding:.55rem .75rem;text-decoration:none;cursor:pointer;font-weight:700;font-size:.86rem}.book-action.secondary{background:#fff;color:var(--navy)}
.fields-grid,.impact-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1rem}.field-card,.impact-card{border:1px solid #d5d1c7;background:#fff;padding:1.2rem;min-height:150px}.field-card button{width:100%;height:100%;border:0;background:transparent;text-align:inherit;cursor:pointer;color:inherit;padding:0}.field-card h3,.impact-card h3{margin:.15rem 0 .6rem;color:var(--navy);font-size:1.1rem}.field-card p,.impact-card p{margin:0;color:#5b6871;font-size:.92rem}.field-number{color:var(--gold);font-size:1.6rem;font-weight:700;line-height:1}
.research-bridge{display:grid;grid-template-columns:1.1fr .9fr;gap:2rem;align-items:center}.research-bridge-visual{padding:2rem;border:1px solid rgba(255,255,255,.24);background:rgba(255,255,255,.06)}.research-bridge-visual ol{margin:0;padding-inline-start:1.25rem;display:grid;gap:.7rem}.related-links{display:flex;gap:.7rem;flex-wrap:wrap;margin-top:1.4rem}.related-links a{display:inline-flex;min-height:44px;align-items:center;padding:.6rem .85rem;border:1px solid rgba(255,255,255,.4);text-decoration:none}.related-links a:hover{background:#fff;color:var(--navy)}
.book-dialog{width:min(1050px,calc(100% - 2rem));max-height:calc(100vh - 2rem);padding:0;border:0;background:#fff;color:var(--ink);box-shadow:0 30px 90px rgba(0,0,0,.45)}.book-dialog::backdrop{background:rgba(2,13,23,.82)}.dialog-header{display:flex;align-items:center;gap:1rem;padding:1rem 1.2rem;border-bottom:1px solid #d5d9dc;background:var(--navy);color:#fff}.dialog-header h2{margin:0;font-size:1.25rem;line-height:1.3}.dialog-close{margin-inline-start:auto;width:44px;height:44px;border:1px solid rgba(255,255,255,.5);background:transparent;color:#fff;font-size:1.5rem;cursor:pointer}.dialog-body{display:grid;grid-template-columns:minmax(300px,.9fr) minmax(0,1.1fr);gap:1.5rem;padding:1.4rem;overflow:auto;max-height:calc(100vh - 150px)}.dialog-image{width:100%;max-height:70vh;object-fit:contain;background:#f2f3f2;border:1px solid #d8dcde}.dialog-details{min-width:0}.dialog-details p{color:#56636d}.dialog-data{display:grid;grid-template-columns:max-content 1fr;gap:.5rem .8rem;margin:1.2rem 0}.dialog-data dt{font-weight:700;color:var(--navy)}.dialog-data dd{margin:0;overflow-wrap:anywhere}.dialog-nav{display:flex;gap:.6rem;margin-top:1rem}.dialog-nav button{min-height:44px;border:1px solid var(--navy);background:#fff;color:var(--navy);padding:.55rem .8rem;cursor:pointer}.no-results{display:none;padding:2rem;border:1px dashed #a7b0b6;background:#fff;text-align:center;color:#5d6870}.no-results.is-visible{display:block}
@media(max-width:1180px){.books-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.book-stats,.fields-grid,.impact-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.series-grid{grid-template-columns:1fr 1fr}}
@media(max-width:900px){.books-hero,.intro-layout,.research-bridge{grid-template-columns:1fr}.hero-image-frame{max-width:720px}.books-tools{position:static}.books-tools-inner{grid-template-columns:1fr}.filter-buttons{justify-content:flex-start}.series-grid{grid-template-columns:1fr}.dialog-body{grid-template-columns:1fr}.dialog-image{max-height:48vh}}
@media(max-width:650px){.books-hero,.books-section{padding-inline:1.15rem}.books-tools{padding-inline:1.15rem}.books-grid,.book-stats,.fields-grid,.impact-grid{grid-template-columns:1fr}.catalogue-group-heading{align-items:flex-start;flex-direction:column}.series-covers{height:180px}.book-card:hover{transform:none}.dialog-body{padding:1rem}}
@media(prefers-reduced-motion:reduce){.book-card{transition:none}}