.book-page{--ink:#f4fbf8;--ink-body:#cfe2da;--ink-muted:#9db7ae;--ink-dim:#8fa89f;--ink-faint:#6f8b81;--accent:#42dead;--line:hsla(0,0%,100%,.09);--line-soft:hsla(0,0%,100%,.06);--line-accent:rgba(66,222,173,.24);color:var(--ink-body)}.book-page [id]{scroll-margin-top:110px}.book-note{margin:0;font-size:13px;font-weight:800;letter-spacing:.14em;color:var(--ink-faint)}.book-card{padding:28px 30px;border:1px solid var(--line);border-radius:26px;background:linear-gradient(168deg,rgba(14,28,27,.62),rgba(6,14,18,.5));transition:border-color .24s ease,transform .24s ease,box-shadow .24s ease}.book-card:hover{border-color:rgba(66,222,173,.4);transform:translateY(-3px);box-shadow:0 24px 60px rgba(0,0,0,.45)}.book-hero{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:72px;align-items:center;padding:48px 0 84px}.book-cover{position:relative;display:flex;justify-content:center;perspective:1600px}.book-cover .glow{position:absolute;z-index:-1;width:460px;height:460px;border-radius:50%;background:radial-gradient(circle,rgba(66,222,173,.14) 0,rgba(66,222,173,0) 66%)}.book-cover .slab-img{position:relative;width:320px;height:auto;border:1px solid rgba(66,222,173,.3);border-radius:6px 14px 14px 6px;box-shadow:0 60px 120px rgba(0,0,0,.72),inset 0 0 0 1px hsla(0,0%,100%,.04);transform:rotateY(-13deg) rotateX(3deg);transform-style:preserve-3d}.book-chapter{display:flex;flex-direction:column;gap:14px;padding:30px;border:1px solid var(--line);border-radius:20px;background:hsla(0,0%,100%,.018);transition:border-color .24s ease,transform .24s ease}.book-chapter:hover{border-color:rgba(66,222,173,.38);transform:translateY(-3px)}.book-chapter .n{font-family:var(--font-jetbrains-mono),ui-monospace,monospace;font-size:13px;font-weight:600;letter-spacing:.1em;color:var(--accent)}.book-chapter h3{margin:0;font-size:20px;font-weight:700;line-height:1.3;letter-spacing:-.3px;color:var(--ink)}.book-chapter p{margin:0;font-size:15.5px;line-height:1.65;color:var(--ink-muted)}.book-bundle-item{display:flex;gap:16px;padding:20px 0;border-bottom:1px solid var(--line-soft)}.book-bundle-item:last-child{border-bottom:0}.book-bundle-tick{display:flex;width:24px;height:24px;flex-shrink:0;align-items:center;justify-content:center;margin-top:2px;border:1px solid rgba(66,222,173,.35);border-radius:50%;background:rgba(66,222,173,.13)}.book-bundle-item h4{margin:0 0 5px;font-size:16.5px;font-weight:700;color:var(--ink)}.book-bundle-item p{margin:0;font-size:15px;line-height:1.58;color:var(--ink-muted)}.book-price{display:flex;align-items:baseline;gap:12px}.book-price .amount{font-family:var(--font-figtree),sans-serif;font-size:62px;font-weight:600;line-height:1;letter-spacing:-2.4px;color:#fff}.book-price .unit{font-size:15px;font-weight:600;color:var(--ink-dim)}@media (max-width:1180px){.book-hero{grid-template-columns:1fr;gap:56px}}@media (max-width:820px){.book-hero{gap:44px;padding:22px 0 56px}.book-cover .slab-img{width:236px}.book-price .amount{font-size:48px}}