:root{color-scheme:dark;--background:#020e20;--cyan:#67eaff;--gold:#f7cc70;--line:#27cfee;--text:#f4f6fa}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:24px;background:var(--background)}
body{margin:0;color:var(--text);font-family:Arial,Helvetica,sans-serif;font-size:clamp(16px,1.3vw,21px);line-height:1.5;background:#020e20 url("fundo-cosmico.png") center top / cover no-repeat;min-height:100vh}
a{color:inherit}img{display:block;max-width:100%;height:auto}h1,h2,p,dd{margin:0}a:focus-visible{outline:3px solid var(--gold);outline-offset:6px}section{scroll-margin-top:24px}
.header,main,.footer{width:100%;max-width:1200px;margin-inline:auto;padding-inline:clamp(16px,2.4vw,32px)}
.header{display:flex;justify-content:space-between;align-items:center;gap:24px;padding-block:18px;border-bottom:1px solid #33d6ff55}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;font:700 clamp(20px,2vw,32px)/1.05 Georgia,serif;letter-spacing:1px}.brand small{display:block;text-align:center;font-size:.48em;letter-spacing:4px;margin-top:6px}.brand-icon{color:var(--gold);font-size:2em;line-height:1}
nav{display:flex;flex-wrap:wrap;gap:clamp(20px,3vw,64px)}nav a{text-decoration:none;padding-block:8px}nav a:hover{color:var(--cyan)}
.hero{display:grid;grid-template-columns:minmax(0,39fr) minmax(0,61fr);align-items:center;gap:clamp(24px,4vw,80px);padding-block:clamp(28px,3vw,64px)}.cover img{width:100%;filter:drop-shadow(0 0 18px #08bafc44)}.hero-content{text-align:center;min-width:0}h1{font:500 clamp(36px,6.1vw,112px)/1.02 Georgia,serif;text-transform:uppercase;letter-spacing:.035em;text-shadow:0 3px 4px #000}h1 span{display:block}.subtitle{color:var(--cyan);font:500 clamp(25px,3.8vw,68px)/1.3 Georgia,serif;text-transform:uppercase;letter-spacing:.17em;margin-top:10px;text-shadow:0 0 12px #00c8ff88}.intro{font-size:clamp(18px,2vw,30px);font-style:italic;max-width:36em;margin:20px auto 26px;text-wrap:pretty}.facts{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));margin:0;padding-top:20px;border-top:1px solid var(--line)}.facts div{display:flex;flex-direction:column-reverse;padding:8px;border-right:1px solid #29d5ff66}.facts div:last-child{border:0}.facts dd{font-size:clamp(20px,2.6vw,38px);font-weight:bold}.facts dt{font-size:clamp(14px,1.5vw,21px)}
.panel{margin-bottom:20px;border:1px solid var(--line);border-radius:26px;background:#00101edb;box-shadow:0 0 16px #00bfff35,inset 0 0 20px #008ad522;overflow:hidden}h2{font:500 clamp(28px,4vw,58px)/1.15 Georgia,serif;text-transform:uppercase;margin-bottom:8px}h2 span{color:var(--gold)}.preface{display:grid;grid-template-columns:minmax(0,30fr) minmax(0,70fr);align-items:center;gap:28px;padding:20px}.section-art{width:100%;border-radius:16px}.preface p{font-size:clamp(17px,1.8vw,26px)}.chapters{padding:24px 30px}.section-heading{display:flex;align-items:center;gap:28px;margin-bottom:20px}.section-heading img{width:25%;border-radius:12px}.section-heading p{font-style:italic}.chapter-list{columns:2;column-gap:70px;margin:0;padding:22px 24px 22px 60px;border:1px solid #38d9f799;border-radius:20px;background:#00101dbb}.chapter-list li{break-inside:avoid;padding:3px 0 3px 8px;overflow-wrap:anywhere}.chapter-list li::marker{color:var(--cyan);font-weight:bold;font-variant-numeric:tabular-nums}
.payment{display:grid;grid-template-columns:minmax(0,24fr) minmax(0,76fr);align-items:center;gap:28px;padding:24px}.payment-art{width:100%;border-radius:16px}.payment-content{min-width:0}.purchase-intro{font-weight:bold;font-size:1.2em}.purchase{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:20px;margin:18px 0}.price{padding:0 24px;border:2px solid #60edff;border-radius:18px;color:var(--cyan);font:500 clamp(34px,4.8vw,70px)/1.4 Georgia,serif;box-shadow:0 0 10px #00d4ff88,inset 0 0 10px #00c8ff44;white-space:nowrap}.whatsapp{display:inline-flex;align-items:center;justify-content:center;gap:16px;min-height:56px;padding:16px 24px;border:1px solid #91ef94;border-radius:18px;background:linear-gradient(#12bb37,#05851e);color:white;text-decoration:none;font-weight:bold;box-shadow:0 0 14px #10db4233}.whatsapp:hover{background:#078b25}.payment-note{font-size:.95em}.footer{display:flex;justify-content:center;gap:clamp(32px,10vw,180px);padding-block:24px 70px}.footer p:first-child{text-align:center}.footer p:first-child strong{display:block;font-size:1.5em}.footer span{display:block;color:#c7d7e9;font-size:.9em}.skip-link{position:absolute;top:12px;left:12px;transform:translateY(-200%);padding:12px;background:#031123;z-index:5}.skip-link:focus{transform:translateY(0)}
@media(min-width:1800px){.hero{grid-template-columns:minmax(0,34fr) minmax(0,66fr)}.cover img{max-width:620px;margin-inline:auto}}
@media(max-width:700px){.header{flex-direction:column;gap:12px}.brand{font-size:25px}nav{width:100%;justify-content:space-around;gap:12px;font-size:15px}.hero{grid-template-columns:1fr;gap:26px;padding-block:26px}.cover img{width:min(75%,363px);margin-inline:auto}h1{font-size:clamp(32px,8vw,54px)}.subtitle{font-size:clamp(23px,5.8vw,36px)}.intro{font-size:18px;margin-block:16px 22px}.facts{padding-top:14px}.facts dd{font-size:22px}.facts dt{font-size:13px}.panel{border-radius:20px}.preface{grid-template-columns:1fr;padding:20px;gap:18px}.section-art{width:min(100%,298px);margin-inline:auto}h2{font-size:30px}.preface p{font-size:17px}.chapters{padding:20px}.section-heading{flex-direction:column;align-items:flex-start;gap:16px}.section-heading img{width:min(100%,262px);align-self:center}.chapter-list{columns:1;padding:18px 12px 18px 36px;font-size:16px;border-radius:14px}.chapter-list li{padding-block:5px}.payment{grid-template-columns:1fr;padding:20px;gap:16px}.payment-art{width:150px;margin-inline:auto}.purchase{flex-direction:column;align-items:stretch}.price{text-align:center;font-size:42px}.whatsapp{font-size:17px}.payment-note{font-size:16px}.footer{flex-direction:column;text-align:center;gap:24px;padding-bottom:40px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
.brand img{width:clamp(210px,24vw,350px);height:auto}

/* Card de capítulos: fechado inicialmente, com abertura e fechamento suaves. */
.chapters .section-heading{position:relative;margin-bottom:0;padding-right:48px}
.chapter-toggle{position:absolute;inset:0;width:100%;height:100%;border:0;border-radius:12px;background:transparent;color:var(--cyan);cursor:pointer;-webkit-tap-highlight-color:transparent}
.chapter-toggle:focus-visible{outline:3px solid var(--gold);outline-offset:6px}
.chapter-chevron{position:absolute;right:8px;top:50%;width:15px;height:15px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:translateY(-70%) rotate(45deg);transition:transform .35s ease}
.chapter-toggle:hover{background:#67eaff08}
.chapters.is-open .chapter-chevron{transform:translateY(-20%) rotate(225deg)}
.chapter-content{display:grid;grid-template-rows:0fr;opacity:0;visibility:hidden;transition:grid-template-rows .4s ease,opacity .3s ease,visibility .4s}
.chapter-content-inner{min-height:0;overflow:hidden}
.chapter-content .chapter-list{margin-top:20px}
.chapters.is-open .chapter-content{grid-template-rows:1fr;opacity:1;visibility:visible}
@media(prefers-reduced-motion:reduce){.chapter-content,.chapter-chevron{transition:none}}
/* Conteúdo centralizado e escala confortável em monitores grandes. */
@media(min-width:701px){
  body{font-size:18px}
  .brand img{width:260px}
  nav{gap:32px}
  .hero{grid-template-columns:minmax(0,39fr) minmax(0,61fr);gap:32px;padding-block:32px}
  .cover img{max-width:363px;margin-inline:auto}
  h1{font-size:clamp(36px,4.6vw,64px)}
  .subtitle{font-size:clamp(25px,3vw,40px)}
  .intro{font-size:21px;margin-block:18px 22px}
  .facts dd{font-size:28px}
  .facts dt{font-size:16px}
  h2{font-size:38px}
  .preface p{font-size:19px}
  .price{font-size:48px}
  .footer{gap:80px;padding-block:24px 48px}
}
/* Rodapé com paisagem própria, marca oficial e créditos. */
.site-footer{margin-top:36px;border-top:1px solid #67eaff55;background:linear-gradient(180deg,rgba(2,14,32,.94) 0%,rgba(2,14,32,.8) 48%,rgba(2,14,32,.35) 100%),url("fundo-rodape.png") center bottom / cover no-repeat;color:#f4f6fa}
.footer-inner{width:100%;max-width:1200px;margin-inline:auto;padding:42px clamp(16px,2.4vw,32px) 22px}
.footer-main{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:48px;padding-bottom:34px}
.footer-eyebrow{color:#d5e6f2;font-size:14px;letter-spacing:.12em;text-transform:uppercase;margin-bottom:14px}
.amazon-badge{display:inline-block;background:#fff;padding:18px 22px;border:1px solid #ffffff88;border-radius:12px;box-shadow:0 6px 24px #0003;line-height:0}
.amazon-logo{display:block;position:relative;width:180px;aspect-ratio:1118/338;overflow:hidden}
.amazon-logo img{position:absolute;width:183.19%;max-width:none;height:auto;left:-41.41%;top:-176.92%}
.footer-format{margin-top:12px;font-size:15px;color:#d5e6f2}
.footer-book{border-left:1px solid #67eaff55;padding-left:36px}
.footer-book-title{font:500 clamp(25px,2.5vw,32px)/1.2 Georgia,serif}
.footer-book-subtitle{margin-top:6px;color:var(--cyan);font-size:15px;letter-spacing:.16em;text-transform:uppercase}
.footer-credits{margin:20px 0 0;font-size:16px}
.footer-credits div{display:flex;flex-wrap:wrap;gap:8px;margin-top:6px}
.footer-credits dt{color:#bad0e2}.footer-credits dt::after{content:':'}.footer-credits dd{margin:0}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;padding-top:20px;border-top:1px solid #b6eaff40;font-size:13px;color:#d2e2ef}
.footer-bottom a{color:#fff;text-decoration:none;font-weight:bold}.footer-bottom a:hover{color:var(--cyan);text-decoration:underline;text-underline-offset:4px}
@media(max-width:700px){.site-footer{margin-top:24px}.footer-inner{padding-top:30px}.footer-main{grid-template-columns:1fr;gap:28px;text-align:center;padding-bottom:26px}.footer-book{border-left:0;border-top:1px solid #67eaff44;padding:24px 0 0}.footer-credits div{justify-content:center}.footer-bottom{flex-direction:column;text-align:center}.amazon-logo{width:160px}}
/* Compra e QR Code. */
.payment-actions{display:flex;flex-direction:column;gap:12px;min-width:0}
.qr-button{display:flex;align-items:center;justify-content:center;gap:14px;min-height:52px;padding:13px 24px;border:1px solid var(--cyan);border-radius:16px;background:#082a40;color:var(--text);font:700 17px/1.4 Arial,sans-serif;cursor:pointer}
.qr-button:hover{background:#10415b}.qr-button:focus-visible,.qr-close:focus-visible{outline:3px solid var(--gold);outline-offset:4px}
.qr-dialog{width:min(94%,460px);max-height:90vh;max-height:90dvh;overflow:auto;padding:26px;border:1px solid var(--line);border-radius:22px;background:#031526;color:var(--text);box-shadow:0 20px 80px #0009;text-align:center}
.qr-dialog::backdrop{background:#000b;backdrop-filter:blur(5px)}
.qr-close-form{display:flex;justify-content:flex-end;margin:-12px -12px 4px 0}.qr-close{width:44px;height:44px;border:1px solid #67eaff55;border-radius:50%;background:#082a40;color:#fff;font:28px/1 Arial,sans-serif;cursor:pointer}
.qr-dialog h2{font-size:25px;text-transform:none;margin-bottom:8px}.qr-dialog p{font-size:16px}
.qr-image{width:min(100%,280px);height:auto;margin:20px auto;background:#fff;border-radius:8px}
.qr-download,.qr-receipt{display:block;color:var(--cyan);font-size:15px;text-underline-offset:4px;padding-block:8px}.qr-help{margin:12px 0;color:#d0deec;line-height:1.5}
@media(max-width:700px){.payment-actions{width:100%}.qr-dialog{padding:20px}}