:root{--alg-blue:#6fa8c8;--alg-ice:#dceef5;--alg-deep:#07101b}
.algoritmo-page{background:#050a11}.algoritmo-page .topbar{position:absolute}.alg-hero{min-height:100svh;position:relative;display:flex;align-items:center;padding:10rem clamp(1.25rem,8vw,8rem) 6rem;overflow:hidden;isolation:isolate}.alg-hero:after{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(90deg,rgba(3,7,12,.98) 0%,rgba(3,7,12,.83) 43%,rgba(3,7,12,.18) 78%),linear-gradient(0deg,#050a11 0%,transparent 35%)}.alg-hero-art{position:absolute;inset:0;z-index:-2;background:url("fora-do-algoritmo/contracapa.webp") center 42%/cover no-repeat;filter:saturate(.75) contrast(1.08);transform:scale(1.02)}.alg-hero-copy{max-width:850px}.alg-hero h1{font:600 clamp(4.4rem,10vw,9.5rem)/.75 var(--serif);letter-spacing:-.055em;margin:.5rem 0 2rem}.alg-hero h1 span{color:var(--alg-ice);text-shadow:0 0 35px rgba(122,185,215,.24)}.alg-subtitle{max-width:660px;color:#c0cfda;font:500 clamp(1.15rem,2vw,1.55rem)/1.45 var(--serif)}.unavailable{cursor:default;color:#8f9ba7;background:rgba(5,10,17,.72)}.hero-signal{position:absolute;right:clamp(1.25rem,7vw,7rem);bottom:4rem;display:flex;align-items:center;gap:.8rem;color:#a8bdc9;font-size:.68rem;letter-spacing:.18em}.hero-signal i{display:block;width:55px;height:1px;background:linear-gradient(90deg,#395061,var(--gold))}
.book-intro{display:grid;grid-template-columns:minmax(260px,.7fr) 1.3fr;gap:clamp(3rem,8vw,9rem);align-items:center;background:radial-gradient(circle at 20% 40%,rgba(71,126,158,.15),transparent 30%),#07101a}.cover-stage{position:relative;max-width:430px;width:100%;aspect-ratio:2/3;margin:auto;perspective:1200px;outline:none;filter:drop-shadow(0 30px 50px rgba(0,0,0,.55))}.cover-face{position:absolute;inset:0;backface-visibility:hidden;transition:transform .8s cubic-bezier(.2,.7,.2,1)}.cover-face img{width:100%;height:100%;object-fit:cover;display:block;border:1px solid rgba(255,255,255,.16)}.cover-back{transform:rotateY(180deg)}.cover-stage:hover .cover-front,.cover-stage:focus .cover-front{transform:rotateY(-180deg)}.cover-stage:hover .cover-back,.cover-stage:focus .cover-back{transform:rotateY(0)}.cover-stage>span{position:absolute;z-index:3;left:50%;bottom:-2.4rem;transform:translateX(-50%);white-space:nowrap;color:#8ea3b1;font-size:.68rem;letter-spacing:.1em;text-transform:uppercase}.intro-copy h2,.character-copy h2{font-size:clamp(3.2rem,6vw,6.6rem)}.intro-copy>p:not(.eyebrow),.character-copy>p:not(.eyebrow){color:#aebdca;max-width:730px}.book-facts{display:flex;gap:1px;margin-top:2.5rem;background:var(--line);border:1px solid var(--line);max-width:650px}.book-facts p{flex:1;margin:0;padding:1.1rem;background:#08121e}.book-facts strong,.book-facts span{display:block}.book-facts strong{font:600 2.2rem/1 var(--serif);color:var(--alg-ice)}.book-facts span{font-size:.7rem;color:#8fa1ae;margin-top:.35rem;text-transform:uppercase;letter-spacing:.08em}
.journey{background:#050a11}.acts{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.acts article{padding:3rem clamp(1.3rem,3vw,3rem)}.acts article+article{border-left:1px solid var(--line)}.acts span{color:var(--gold);font-size:.68rem;letter-spacing:.18em}.acts h3{font:600 clamp(2rem,3vw,3.3rem)/1 var(--serif);margin:.8rem 0 1.2rem}.acts p{color:#97a8b5}.characters{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(3rem,8vw,8rem);align-items:center;background:#09131f}.character-image{min-height:620px}.character-image img{width:100%;height:100%;min-height:620px;object-fit:cover;border:1px solid var(--line);filter:saturate(.78)}.character-list{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:2rem}.character-list span{border:1px solid var(--line);padding:.45rem .75rem;color:#c4d0d8;font-size:.75rem}
.visual-story{background:#050910}.story-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem}.story-grid figure{position:relative;margin:0;min-height:310px;overflow:hidden;border:1px solid var(--line);background:#0a111b}.story-grid figure.wide{grid-column:span 2}.story-grid figure.portrait{min-height:520px}.story-grid img{width:100%;height:100%;position:absolute;inset:0;object-fit:cover;filter:saturate(.78);transition:.5s}.story-grid figure:hover img{transform:scale(1.035);filter:saturate(1)}.story-grid figure:after{content:"";position:absolute;inset:45% 0 0;background:linear-gradient(transparent,rgba(2,5,9,.9))}.story-grid figcaption{position:absolute;z-index:2;left:1.2rem;bottom:1rem;color:#e4edf2;font-family:var(--serif);font-size:1.4rem}.alg-quote{text-align:center;background:radial-gradient(circle at 50% 100%,rgba(72,132,165,.22),transparent 38%),#07101a}.alg-quote blockquote{font:600 clamp(2.8rem,6vw,6.4rem)/.95 var(--serif);max-width:1150px;margin:0 auto 3rem;color:#e6eff3}
@media(max-width:900px){.book-intro,.characters{grid-template-columns:1fr}.cover-stage{max-width:360px;margin-bottom:3rem}.acts{grid-template-columns:1fr}.acts article+article{border-left:0;border-top:1px solid var(--line)}.character-image,.character-image img{min-height:480px}.story-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.alg-hero{align-items:flex-end;min-height:88svh}.alg-hero:after{background:linear-gradient(0deg,#050a11 4%,rgba(3,7,12,.87) 62%,rgba(3,7,12,.35))}.alg-hero h1{font-size:clamp(4rem,20vw,6rem)}.hero-signal{top:6rem;bottom:auto}.book-facts{flex-direction:column}.story-grid{grid-template-columns:1fr}.story-grid figure.wide{grid-column:auto}.story-grid figure,.story-grid figure.portrait{min-height:390px}.cover-stage>span{font-size:.56rem}.character-image,.character-image img{min-height:360px}}
.purchase-actions{display:flex;justify-content:center;gap:1rem;flex-wrap:wrap}.purchase-actions .ghost{background:rgba(5,10,17,.55)}