.book-detail{--bd-line:color-mix(in srgb,var(--aubergine) 12%,transparent);padding:clamp(1.5rem,4vw,3rem) 0 clamp(3.5rem,7vw,6rem)}.book-detail .wrap{max-width:var(--maxw);margin:0 auto}.book-back-btn{display:inline-flex;align-items:center;gap:.4rem;padding:.5rem 1rem .5rem .8rem;margin-bottom:1.25rem;border:1px solid var(--bd-line);border-radius:999px;background:var(--ivory);color:var(--aubergine);font-size:.85rem;text-decoration:none;transition:background .15s ease,transform .15s ease,border-color .15s ease}.book-back-btn:hover{background:var(--mist);border-color:color-mix(in srgb,var(--aubergine) 20%,transparent)}.book-back-btn svg{transition:transform .2s ease}.book-back-btn:hover svg{transform:translateX(-3px)}.book-crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:.55rem;font-size:.82rem;color:var(--dusk);margin-bottom:clamp(1.5rem,3vw,2.5rem)}.book-crumbs a{color:var(--dusk);text-decoration:none;transition:color .15s ease}.book-crumbs a:hover{color:var(--aubergine)}.book-crumbs span[aria-hidden]{opacity:.4}.book-crumbs [aria-current]{color:var(--aubergine)}.book-detail-grid{display:grid;grid-template-columns:minmax(260px,340px) 1fr;grid-gap:clamp(2rem,5vw,4rem);gap:clamp(2rem,5vw,4rem);align-items:start}.book-detail-rail{position:-webkit-sticky;position:sticky;top:6.5rem;display:flex;flex-direction:column;gap:1.5rem}.book-detail-cover{border-radius:12px;overflow:hidden;box-shadow:0 30px 60px -30px color-mix(in srgb,var(--aubergine) 55%,transparent)}.book-detail-cover .book-cover-photo{display:block;width:100%;height:auto}.book-buy-card{background:var(--mist);border:1px solid var(--bd-line);border-radius:16px;padding:1.5rem}.book-buy-price{display:flex;flex-direction:column;gap:.15rem;margin-bottom:1.1rem}.book-buy-amount{font-family:var(--serif);font-weight:400;font-size:2.4rem;line-height:1;background:var(--gold-grad);-webkit-background-clip:text;background-clip:text;color:transparent}.book-buy-unit{font-size:.78rem;letter-spacing:.04em;color:var(--dusk)}.book-buy-download{display:flex;align-items:flex-start;gap:.5rem;margin-top:1rem;padding:.7rem .85rem;border-radius:10px;background:color-mix(in srgb,var(--rose) 16%,transparent);color:var(--aubergine);font-size:.82rem;line-height:1.5;font-weight:500}.book-buy-download span{color:var(--rose-text);font-weight:700}.book-buy-note{margin-top:.9rem;font-size:.8rem;line-height:1.6;color:var(--dusk)}.book-buy-note a{color:var(--lavender-text);text-decoration:underline;text-underline-offset:2px}.book-detail-info .badge{margin-bottom:1rem}.book-detail-title{font-size:clamp(2.2rem,1rem + 4vw,3.6rem);line-height:1.05;margin:.25rem 0 .5rem}.book-detail-info .book-arabic{font-size:1.3rem;color:var(--dusk);margin:0 0 .6rem}.book-detail-author{font-family:var(--serif);font-style:italic;color:var(--dusk);margin-bottom:1.25rem}.book-detail-tagline{font-size:clamp(1.05rem,.95rem + .5vw,1.3rem);line-height:1.6;color:var(--aubergine);padding-bottom:1.5rem;border-bottom:1px solid var(--bd-line)}.book-detail-section{margin-top:2rem}.book-detail-h2{font-family:var(--serif);font-weight:400;font-size:1.5rem;color:var(--aubergine);margin-bottom:.85rem}.book-detail-section p{color:var(--dusk);line-height:1.8;max-width:60ch}.book-detail-section p+p{margin-top:1rem}.book-detail-highlights{list-style:none;margin:0;padding:0;display:grid;grid-gap:.7rem;gap:.7rem}.book-detail-highlights li{display:flex;align-items:flex-start;gap:.7rem;color:var(--aubergine);line-height:1.6}.book-detail-highlights .check{color:var(--rose-text);flex:none;margin-top:.1rem}.book-detail-facts{margin:0;border-top:1px solid var(--bd-line)}.book-detail-facts>div{display:grid;grid-template-columns:130px 1fr;grid-gap:1rem;gap:1rem;padding:.8rem 0;border-bottom:1px solid var(--bd-line)}.book-detail-facts dt{font-size:.75rem;letter-spacing:.08em;text-transform:uppercase;color:var(--dusk);font-weight:500}.book-detail-facts dd{margin:0;color:var(--aubergine)}.book-detail-back{display:inline-block;margin-top:2rem;color:var(--dusk);text-decoration:none;font-size:.9rem;transition:color .15s ease}.book-detail-back:hover{color:var(--aubergine)}@media (max-width:820px){.book-detail-grid{grid-template-columns:1fr}.book-detail-rail{position:static;flex-direction:column;max-width:360px;margin:0 auto}}@media (prefers-reduced-motion:reduce){.book-crumbs a,.book-detail-back{transition:none}}