:root {
  --ink: #1c1712;
  --muted: #5c5348;
  --paper: #f3ecdf;
  --paper-2: #e7dcc8;
  --band: #1c1712;
  --band-text: #f6f0e6;
  --accent: #c4491d;
  --accent-dark: #8d2f12;
  --line: rgba(28, 23, 18, 0.16);
  --focus: #1c1712;
  --serif: "Fraunces", Georgia, serif;
  --sans: "Outfit", "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.05rem;
  line-height: 1.55;
}
img { max-width: 100%; }
a { color: inherit; }
.skip {
  position: absolute;
  left: 1rem;
  top: -4rem;
  background: var(--ink);
  color: var(--paper);
  padding: 0.5rem 0.8rem;
}
.skip:focus { top: 0.5rem; z-index: 5; }

.top, .hero, section, footer { padding-inline: 1.25rem; }
.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding-block: 0.9rem;
  position: sticky;
  top: 0;
  background: rgba(243, 236, 223, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
  z-index: 2;
}
.brand { margin: 0; font-size: 0.92rem; letter-spacing: 0.04em; }

h1, h2, .price span, .cover strong {
  font-family: var(--serif);
  font-weight: 560;
  letter-spacing: -0.03em;
  line-height: 1.08;
}
h1 { font-size: clamp(2.1rem, 8vw, 4.4rem); margin: 0.35rem 0 1rem; }
h2 { font-size: clamp(1.7rem, 4vw, 2.5rem); margin: 0 0 0.8rem; }
p { margin: 0 0 0.9rem; }

.kicker, .fine, figcaption {
  color: var(--muted);
  font-size: 0.92rem;
}
.kicker {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  font-weight: 600;
}
.lead { font-size: 1.15rem; max-width: 38rem; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  color: #fffaf6;
  text-decoration: none;
  font-weight: 600;
  padding: 0.95rem 1.2rem;
  border-radius: 999px;
  border: 2px solid transparent;
  min-height: 48px;
}
.btn:hover { background: var(--accent-dark); }
.btn:focus-visible, a:focus-visible, summary:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}
.btn-small { padding: 0.55rem 0.9rem; min-height: 40px; font-size: 0.92rem; white-space: nowrap; }
.btn-large { font-size: 1.05rem; padding: 1.05rem 1.4rem; }
.band .btn, .offer .btn, .final .btn { margin-top: 0.4rem; }

.hero, section { padding-block: 2.5rem; }
.hero { display: grid; gap: 2rem; }
.book { margin: 0; justify-self: center; }
.book-3d {
  width: min(260px, 70vw);
  aspect-ratio: 3 / 4.2;
  background:
    linear-gradient(90deg, rgba(0,0,0,0.18), transparent 18%),
    linear-gradient(160deg, #f7f1e6 0%, #efe2cc 40%, #d7c4a4 100%);
  border-radius: 4px 14px 14px 4px;
  box-shadow: 14px 18px 0 #1c1712;
  padding: 1.2rem 1.1rem 1rem 1.3rem;
  transform: rotate(-2.5deg);
}
.cover {
  height: 100%;
  border: 1.5px solid var(--ink);
  padding: 1rem 0.9rem;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}
.cover-kicker { font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; }
.cover strong { font-size: 1.55rem; }
.cover-sub { color: var(--muted); font-size: 0.95rem; }
.cover-author { margin-top: auto; font-weight: 600; }
figcaption { text-align: center; margin-top: 0.8rem; }

.band {
  background: var(--band);
  color: var(--band-text);
}
.band .placeholder { color: #e7c07a; }
.band .btn { background: #f3ecdf; color: var(--ink); }
.band .btn:hover { background: #fff; }

.steps, .chapters, .offer-list { list-style: none; padding: 0; margin: 0 0 1rem; }
.steps li, .chapters li { padding: 0.85rem 0; border-top: 1px solid var(--line); }
.band .steps li, .band .chapters li { border-top-color: rgba(246, 240, 230, 0.16); }
.chapters li { display: grid; grid-template-columns: auto 1fr; gap: 0.8rem; }
.chapters span { font-family: var(--serif); font-size: 1.3rem; }

#para-quem { display: grid; gap: 1.5rem; }
#para-quem ul { margin: 0; padding-left: 1.1rem; }
#para-quem li + li { margin-top: 0.45rem; }

.placeholder {
  border-left: 3px solid #c4491d;
  padding: 0.2rem 0 0.2rem 0.75rem;
  color: #7a4b12;
  font-size: 0.95rem;
}
.price { margin: 0.2rem 0; }
.price span { font-size: clamp(3rem, 10vw, 4.5rem); }
.offer {
  background: #fffaf3;
  border-block: 1px solid var(--line);
}
.offer-list li { padding: 0.35rem 0 0.35rem 1.1rem; position: relative; }
.offer-list li::before {
  content: "";
  width: 0.45rem;
  height: 0.45rem;
  background: var(--accent);
  position: absolute;
  left: 0;
  top: 0.7rem;
}
.pay-row { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 1rem 0; }
.pay-row span {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.25rem 0.7rem;
  font-size: 0.85rem;
  font-weight: 600;
}
.checkout-note {
  background: #fff4d6;
  color: #5c4010;
  padding: 0.7rem 0.8rem;
  border-radius: 8px;
}

.guarantee {
  display: grid;
  gap: 1rem;
  align-items: center;
}
.seal {
  width: 108px;
  height: 108px;
  border: 2px dashed var(--accent);
  border-radius: 50%;
  display: grid;
  place-items: center;
  text-align: center;
  transform: rotate(-8deg);
}
.seal strong { font-family: var(--serif); font-size: 2.4rem; line-height: 1; }
.seal span { display: block; font-size: 0.8rem; letter-spacing: 0.08em; text-transform: uppercase; }

details { border-top: 1px solid var(--line); padding: 0.85rem 0; }
details:last-of-type { border-bottom: 1px solid var(--line); }
summary { cursor: pointer; font-weight: 600; }
summary:hover { color: var(--accent-dark); }
details p { margin: 0.6rem 0 0.2rem; color: var(--muted); }

.final { text-align: left; padding-bottom: 3rem; }
footer {
  padding-block: 2rem 2.5rem;
  border-top: 1px solid var(--line);
  font-size: 0.95rem;
}
footer nav { display: flex; flex-wrap: wrap; gap: 0.9rem; }
footer a { text-underline-offset: 3px; }

.legal { max-width: 40rem; margin: 0 auto; padding: 2rem 1.25rem 3rem; }
.legal h1 { font-size: clamp(1.8rem, 5vw, 2.6rem); }

@media (min-width: 768px) {
  .top, .hero, section, footer { padding-inline: 8vw; }
  .hero { grid-template-columns: 1.2fr 0.8fr; align-items: center; padding-block: 4rem; }
  #para-quem { grid-template-columns: 1fr 1fr; gap: 3rem; }
  .guarantee { grid-template-columns: auto 1fr; gap: 1.5rem; }
  .chapters { max-width: 46rem; }
}

@media (min-width: 1100px) {
  .top, .hero, section, footer { padding-inline: 12vw; }
}