.book-hero{padding-top:calc(var(--nav-h) + 72px);padding-bottom:80px;background:var(--bg)}.book-hero__inner{display:grid;grid-template-columns:320px 1fr;gap:80px;align-items:start}.book-hero__cover img,.book-gallery{width:100%}.book-gallery{display:flex;flex-direction:column;gap:12px}.book-gallery__main{position:relative;border-radius:8px;overflow:hidden;background:var(--bg-alt);aspect-ratio:3/4;cursor:zoom-in}.book-gallery__main img{width:100%;height:100%;object-fit:contain;display:block;transition:opacity .18s ease}.book-gallery__arrow{position:absolute;top:50%;transform:translateY(-50%);width:36px;height:36px;border-radius:50%;background:#ffffffe6;border:1px solid var(--border);color:var(--ink);display:flex;align-items:center;justify-content:center;cursor:pointer;opacity:0;transition:opacity .2s,border-color .2s,color .2s;z-index:2}.book-gallery__main:hover 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