:root {
  --ink: #101127;
  --ink-2: #272942;
  --muted: #62687b;
  --deep: #090719;
  --deep-2: #1b123f;
  --paper: #f8f5ee;
  --paper-2: #fffdf8;
  --teal: #07858f;
  --aqua: #42d7d2;
  --gold: #e9be69;
  --gold-2: #ffe4a6;
  --orange: #e08a22;
  --wine: #77314b;
  --line: rgba(16, 17, 39, 0.1);
  --line-light: rgba(255, 255, 255, 0.16);
  --shadow: 0 24px 70px rgba(16, 17, 39, 0.18);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Inter", Arial, sans-serif;
  line-height: 1.55;
  overflow-x: hidden;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
}

.book-header {
  position: fixed;
  z-index: 30;
  top: 0;
  left: 0;
  right: 0;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
  width: min(1180px, calc(100% - 40px));
  margin: 18px auto 0;
  padding: 10px 12px;
  color: #fff;
  border: 1px solid var(--line-light);
  border-radius: 999px;
  background: rgba(9, 7, 25, 0.62);
  backdrop-filter: blur(18px);
  transition: background 180ms ease, box-shadow 180ms ease, margin 180ms ease;
}

.book-header.is-scrolled {
  margin-top: 10px;
  background: rgba(9, 7, 25, 0.92);
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.24);
}

.brand {
  display: flex;
  align-items: center;
  min-width: 230px;
  gap: 10px;
}

.brand img {
  width: 46px;
  height: 46px;
  object-fit: contain;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 13px;
  line-height: 1.1;
}

.brand small {
  color: rgba(255, 255, 255, 0.68);
  font-size: 11px;
}

.site-nav {
  justify-self: center;
  display: flex;
  align-items: center;
  gap: 22px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 13px;
  font-weight: 700;
}

.site-nav a {
  transition: color 160ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: #fff;
}

.header-cta {
  display: inline-flex;
  align-items: center;
  min-height: 46px;
  padding: 0 19px;
  color: #181126;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--gold-2), var(--gold));
  font-size: 13px;
  font-weight: 900;
}

.menu-button {
  display: none;
  min-width: 74px;
  height: 42px;
  border: 0;
  border-radius: 999px;
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
  padding: 0 14px;
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}

.section-light {
  background: var(--paper);
}

.section-paper {
  background: linear-gradient(180deg, var(--paper-2), #eef8f7);
}

.section-dark {
  color: #fff;
  background: var(--deep);
}

.book-hero {
  position: relative;
  min-height: 820px;
  overflow: hidden;
  padding: 136px 0 58px;
  color: #fff;
  background:
    linear-gradient(90deg, rgba(7, 6, 20, 0.98) 0%, rgba(16, 10, 43, 0.88) 38%, rgba(8, 38, 49, 0.24) 66%, rgba(7, 36, 43, 0.44) 100%),
    linear-gradient(180deg, rgba(7, 6, 20, 0.04) 46%, rgba(7, 6, 20, 0.88) 100%),
    url("../assets/livro/autores-com-livros.webp") right 6% top 74px / auto 94% no-repeat,
    linear-gradient(115deg, #070617 0%, #181036 42%, #063f48 84%),
    var(--deep);
}

.book-hero::before,
.book-hero::after {
  content: "";
  position: absolute;
  inset: 0;
}

.book-hero::before {
  background:
    linear-gradient(115deg, rgba(66, 215, 210, 0.16), transparent 34%),
    linear-gradient(310deg, rgba(233, 190, 105, 0.18), transparent 34%);
  mix-blend-mode: screen;
  opacity: 0.82;
}

.book-hero::after {
  background:
    linear-gradient(90deg, transparent 0%, transparent 42%, rgba(7, 6, 20, 0.58) 50%, rgba(7, 6, 20, 0.18) 60%, transparent 70%),
    linear-gradient(90deg, rgba(9, 7, 25, 0.62) 0%, rgba(9, 7, 25, 0.18) 52%, rgba(9, 7, 25, 0.08) 74%, rgba(9, 7, 25, 0.32) 100%),
    linear-gradient(180deg, rgba(9, 7, 25, 0) 58%, rgba(9, 7, 25, 0.9) 100%);
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(430px, 1.1fr);
  gap: 54px;
  align-items: center;
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.hero-copy {
  width: min(640px, 100%);
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--aqua);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero-copy h1,
.section-heading h2,
.feeling-copy h2,
.offer-copy h2,
.delivery-panel h2,
.authors-copy h2,
.video-copy h2,
.final-cta h2 {
  margin: 0;
  font-family: "Playfair Display", Georgia, serif;
  font-weight: 700;
  line-height: 1.04;
}

.hero-copy h1 {
  margin-top: 22px;
  color: #fff;
  font-size: clamp(42px, 5vw, 74px);
  max-width: 680px;
  text-shadow: 0 16px 36px rgba(0, 0, 0, 0.24);
}

.hero-copy p {
  max-width: 610px;
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.84);
  font-size: 19px;
}

.hero-actions,
.final-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 56px;
  gap: 10px;
  padding: 0 24px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-weight: 900;
  text-transform: uppercase;
  cursor: pointer;
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
}

.button-primary {
  color: #171028;
  background: linear-gradient(135deg, var(--gold-2), var(--gold));
  box-shadow: 0 18px 40px rgba(233, 190, 105, 0.24);
}

.button-secondary,
.button-outline {
  color: #fff;
  border-color: rgba(66, 215, 210, 0.66);
  background: rgba(66, 215, 210, 0.08);
}

.button-outline {
  color: var(--ink);
  border-color: rgba(7, 133, 143, 0.28);
  background: #fff;
}

.hero-proof {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 13px;
  font-weight: 700;
}

.hero-proof span,
.delivery-row span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.hero-proof i,
.delivery-row i {
  color: var(--aqua);
}

.hero-visual {
  position: relative;
  min-height: 560px;
}

.hero-book-badge {
  position: absolute;
  right: 0;
  bottom: 22px;
  display: none;
  grid-template-columns: 220px 1fr;
  gap: 22px;
  align-items: center;
  width: min(560px, 100%);
  padding: 22px 24px;
  border: 1px solid rgba(66, 215, 210, 0.28);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(9, 7, 25, 0.86), rgba(7, 133, 143, 0.78)),
    rgba(255, 255, 255, 0.08);
  box-shadow: 0 26px 58px rgba(0, 0, 0, 0.32);
  backdrop-filter: blur(16px);
}

.hero-book-badge img {
  width: 220px;
  filter: drop-shadow(0 18px 28px rgba(0, 0, 0, 0.38));
}

.hero-book-badge span,
.hero-book-badge strong,
.hero-book-badge small {
  display: block;
}

.hero-book-badge span {
  color: var(--aqua);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero-book-badge strong {
  color: var(--gold);
  font-family: "Playfair Display", Georgia, serif;
  font-size: 38px;
  line-height: 1;
}

.hero-book-badge small {
  color: rgba(255, 255, 255, 0.78);
  font-weight: 800;
}

.hero-strip {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  width: min(1120px, calc(100% - 40px));
  margin: 70px auto 0;
  overflow: hidden;
  border: 1px solid var(--line-light);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(16px);
}

.hero-strip article {
  padding: 24px;
  border-right: 1px solid rgba(255, 255, 255, 0.12);
}

.hero-strip article:last-child {
  border-right: 0;
}

.hero-strip strong,
.hero-strip span {
  display: block;
}

.hero-strip strong {
  color: var(--gold);
  font-family: "Playfair Display", Georgia, serif;
  font-size: 24px;
}

.hero-strip span {
  color: rgba(255, 255, 255, 0.78);
  font-weight: 650;
}

.intro,
.volumes,
.delivery,
.faq {
  padding: 92px 0;
}

.section-heading {
  width: min(780px, calc(100% - 40px));
  margin: 0 auto 54px;
  text-align: center;
}

.section-heading h2,
.feeling-copy h2,
.offer-copy h2,
.delivery-panel h2,
.authors-copy h2,
.video-copy h2,
.final-cta h2 {
  margin-top: 12px;
  color: var(--ink);
  font-size: clamp(36px, 4vw, 58px);
}

.section-heading p,
.feeling-copy p,
.offer-copy p,
.delivery-panel p,
.authors-copy p,
.video-copy p,
.final-cta p {
  color: var(--muted);
  font-size: 17px;
}

.intro-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.intro-grid article {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-2);
  box-shadow: 0 14px 32px rgba(16, 17, 39, 0.06);
}

.intro-grid i {
  color: var(--teal);
  font-size: 30px;
}

.intro-grid h3 {
  margin: 16px 0 8px;
  color: var(--ink);
  font-size: 18px;
}

.intro-grid p {
  margin: 0;
  color: var(--muted);
}

.systemic-value {
  padding: 86px 0;
  background:
    linear-gradient(120deg, rgba(9, 7, 25, 0.96), rgba(22, 14, 54, 0.94)),
    linear-gradient(90deg, rgba(66, 215, 210, 0.18), rgba(233, 190, 105, 0.14));
}

.systemic-heading {
  width: min(760px, calc(100% - 40px));
  margin: 0 auto 36px;
  text-align: center;
}

.systemic-heading h2 {
  margin: 12px 0 0;
  color: #fff;
  font-family: "Playfair Display", Georgia, serif;
  font-size: clamp(34px, 4vw, 54px);
  line-height: 1.04;
}

.systemic-metrics {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.06);
  box-shadow: 0 22px 58px rgba(0, 0, 0, 0.22);
}

.systemic-metrics article {
  display: grid;
  justify-items: center;
  gap: 4px;
  padding: 26px 16px;
  text-align: center;
  border-right: 1px solid rgba(255, 255, 255, 0.12);
}

.systemic-metrics article:last-child {
  border-right: 0;
}

.systemic-metrics i {
  color: #fff;
  font-size: 28px;
}

.systemic-metrics strong {
  color: var(--aqua);
  font-size: 36px;
  line-height: 1;
}

.systemic-metrics span {
  color: rgba(255, 255, 255, 0.82);
  font-weight: 800;
}

.systemic-topics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  width: min(1120px, calc(100% - 40px));
  margin: 24px auto 0;
}

.systemic-topics article {
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.06);
}

.systemic-topics h3 {
  margin: 0 0 8px;
  color: var(--gold);
  font-family: "Playfair Display", Georgia, serif;
  font-size: 24px;
}

.systemic-topics p {
  margin: 0;
  color: rgba(255, 255, 255, 0.76);
}

.book-feeling {
  display: grid;
  grid-template-columns: 0.94fr 1.06fr;
  gap: 58px;
  align-items: center;
  width: 100%;
  margin: 0;
  padding: 92px max(20px, calc((100vw - 1120px) / 2));
}

.check-list {
  display: grid;
  gap: 12px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: var(--ink-2);
  font-weight: 750;
}

.check-list i {
  color: var(--teal);
  margin-top: 4px;
}

.book-combo {
  display: grid;
  place-items: center;
}

.book-combo img {
  width: min(520px, 100%);
  filter: drop-shadow(0 28px 44px rgba(16, 17, 39, 0.22));
}

.volume-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.volume-panel {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 24px;
  align-items: center;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(224, 138, 34, 0.1), transparent 44%),
    var(--paper-2);
  box-shadow: var(--shadow);
}

.volume-panel-alt {
  background:
    linear-gradient(135deg, rgba(7, 133, 143, 0.14), transparent 44%),
    var(--paper-2);
}

.volume-panel img {
  width: 160px;
  border-radius: 6px;
  box-shadow: 0 18px 34px rgba(16, 17, 39, 0.22);
}

.volume-label,
.plan-label {
  color: var(--teal);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.volume-panel h3,
.price-card h3,
.delivery-steps h3,
.credentials h3 {
  margin: 8px 0 8px;
  color: var(--ink);
  font-family: "Playfair Display", Georgia, serif;
  font-size: 27px;
  line-height: 1.1;
}

.volume-panel p {
  margin: 0 0 18px;
  color: var(--muted);
}

.text-link {
  display: inline-flex;
  align-items: center;
  color: var(--wine);
  font-weight: 900;
}

.offer {
  padding: 92px 0 0;
  background:
    linear-gradient(90deg, rgba(9, 7, 25, 0.96), rgba(26, 17, 63, 0.92)),
    url("../assets/livro/autores-com-livros.webp") center / cover no-repeat;
}

.offer-copy {
  width: min(760px, calc(100% - 40px));
  margin: 0 auto 42px;
  text-align: center;
}

.offer-copy h2,
.offer-copy p,
.video-copy h2,
.video-copy p,
.final-cta h2,
.final-cta p {
  color: #fff;
}

.offer-copy p,
.video-copy p,
.final-cta p {
  color: rgba(255, 255, 255, 0.76);
}

.offer-badge {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 0 16px;
  color: #171028;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--gold-2), var(--gold));
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}

.offer-grid {
  display: grid;
  grid-template-columns: 1.22fr 0.89fr 0.89fr;
  gap: 18px;
  align-items: stretch;
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.price-card {
  display: flex;
  flex-direction: column;
  min-height: 100%;
  padding: 26px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius);
  color: var(--ink);
  background: var(--paper-2);
  box-shadow: 0 20px 54px rgba(0, 0, 0, 0.22);
}

.offer-cover {
  align-self: center;
  width: min(160px, 78%);
  height: 210px;
  object-fit: contain;
  margin: -6px auto 16px;
  filter: drop-shadow(0 18px 28px rgba(16, 17, 39, 0.2));
}

.offer-cover-combo {
  width: min(310px, 92%);
  height: 174px;
  margin-top: -10px;
  filter: drop-shadow(0 20px 30px rgba(0, 0, 0, 0.32));
}

.price-card-featured {
  color: #fff;
  background:
    linear-gradient(135deg, rgba(119, 49, 75, 0.96), rgba(21, 12, 48, 0.96)),
    linear-gradient(90deg, rgba(66, 215, 210, 0.18), transparent);
}

.price-card-featured h3,
.price-card-featured .plan-label,
.price-card-featured p,
.price-card-featured li {
  color: #fff;
}

.price-card p {
  margin: 0;
  color: var(--muted);
}

.price-card-featured p,
.price-card-featured li {
  color: rgba(255, 255, 255, 0.78);
}

.price {
  display: grid;
  gap: 3px;
  margin: 24px 0;
}

.price span,
.price small {
  color: inherit;
  opacity: 0.74;
}

.price strong {
  color: var(--gold);
  font-family: "Playfair Display", Georgia, serif;
  font-size: clamp(52px, 6vw, 78px);
  line-height: 1;
}

.price-small strong {
  color: var(--teal);
  font-size: 44px;
}

.price-card ul {
  display: grid;
  gap: 10px;
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
}

.price-card li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-weight: 700;
}

.price-card li i {
  color: var(--gold);
  margin-top: 4px;
}

.price-card .button {
  margin-top: auto;
  width: 100%;
}

.delivery-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 70px;
  padding: 26px max(20px, calc((100vw - 1120px) / 2));
  color: var(--ink-2);
  background: var(--paper-2);
}

.delivery-row span {
  justify-content: center;
  color: var(--muted);
  font-weight: 800;
}

.delivery-panel {
  display: grid;
  grid-template-columns: 0.88fr 1.12fr;
  gap: 46px;
  align-items: start;
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.delivery-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.delivery-steps article {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-2);
  box-shadow: 0 14px 32px rgba(16, 17, 39, 0.06);
}

.delivery-steps span {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  color: var(--deep);
  border-radius: 999px;
  background: var(--gold);
  font-weight: 900;
}

.delivery-steps h3 {
  font-size: 22px;
}

.delivery-steps p {
  margin: 0;
  color: var(--muted);
}

.social-proof {
  position: relative;
  padding: 98px max(20px, calc((100vw - 1120px) / 2));
  overflow: hidden;
  background:
    radial-gradient(circle at 10% 16%, rgba(66, 215, 210, 0.26), transparent 34%),
    radial-gradient(circle at 90% 78%, rgba(233, 190, 105, 0.24), transparent 34%),
    linear-gradient(135deg, #fffdf8 0%, #eef8f7 48%, #f8efe2 100%);
}

.social-proof::before {
  content: "";
  position: absolute;
  left: -86px;
  bottom: -116px;
  width: 420px;
  height: 420px;
  background: url("../assets/livro/logo-amparar.webp") center / contain no-repeat;
  opacity: 0.055;
  filter: blur(1px);
  pointer-events: none;
}

.social-proof-shell {
  position: relative;
  z-index: 1;
  width: min(1120px, 100%);
  margin: 0 auto;
}

.proof-heading {
  max-width: 800px;
  margin-bottom: 42px;
}

.proof-heading h2 {
  margin: 12px 0 16px;
  color: var(--ink);
  font-family: "Playfair Display", Georgia, serif;
  font-size: clamp(36px, 4.2vw, 62px);
  line-height: 0.98;
}

.proof-heading p {
  margin: 0;
  color: var(--muted);
  font-size: 18px;
}

.proof-showcase {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 18px;
  align-items: stretch;
}

.proof-video-feature,
.proof-book-photo,
.proof-instagram,
.proof-video-grid article {
  border: 1px solid rgba(16, 17, 39, 0.1);
  border-radius: var(--radius);
  background: rgba(255, 253, 248, 0.78);
  box-shadow: 0 22px 60px rgba(16, 17, 39, 0.12);
  backdrop-filter: blur(14px);
}

.proof-video-feature {
  display: grid;
  grid-template-columns: minmax(220px, 0.72fr) 1fr;
  gap: 24px;
  padding: 18px;
  background:
    linear-gradient(135deg, rgba(9, 7, 25, 0.95), rgba(25, 15, 62, 0.9)),
    radial-gradient(circle at 82% 12%, rgba(66, 215, 210, 0.26), transparent 42%);
  color: #fff;
}

.proof-link-feature {
  color: #fff;
  text-decoration: none;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.proof-link-feature:hover {
  transform: translateY(-4px);
  border-color: rgba(66, 215, 210, 0.42);
  box-shadow: 0 28px 76px rgba(16, 17, 39, 0.2);
}

.proof-media-frame {
  position: relative;
  min-height: 390px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: calc(var(--radius) - 2px);
  background: #060513;
}

.proof-media-frame img {
  width: 100%;
  height: 100%;
  min-height: 390px;
  object-fit: cover;
  opacity: 0.82;
  filter: saturate(1.08) contrast(0.98);
}

.proof-media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, transparent 28%, rgba(6, 5, 19, 0.72)),
    radial-gradient(circle at 50% 46%, rgba(66, 215, 210, 0.18), transparent 42%);
}

.proof-play {
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 18px;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--gold), #ffe7a4);
  color: var(--ink) !important;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.2);
}

.proof-video-feature video,
.proof-video-grid video {
  display: block;
  width: 100%;
  height: 100%;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: calc(var(--radius) - 2px);
  background: #060513;
  object-fit: contain;
}

.proof-video-feature video {
  aspect-ratio: 9 / 16;
  max-height: 520px;
}

.proof-video-feature > div {
  align-self: end;
  padding: 12px 8px 12px 0;
}

.proof-video-feature > .proof-media-frame {
  align-self: stretch;
  padding: 0;
}

.proof-youtube-feature > .youtube-frame {
  align-self: stretch;
  padding: 0;
}

.proof-youtube-feature > div:not(.youtube-frame) {
  align-self: center;
  padding: 24px 8px 24px 0;
}

.youtube-frame {
  position: relative;
  min-height: 460px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: calc(var(--radius) - 2px);
  background:
    radial-gradient(circle at 50% 18%, rgba(66, 215, 210, 0.2), transparent 42%),
    #060513;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.youtube-frame iframe {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 460px;
  border: 0;
  aspect-ratio: 9 / 16;
}

.proof-inline-link {
  display: inline-flex;
  width: fit-content;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  margin-top: 22px;
  padding: 0 18px;
  border: 1px solid rgba(66, 215, 210, 0.48);
  border-radius: 999px;
  color: #fff;
  font-weight: 900;
  text-decoration: none;
  transition: transform 0.2s ease, background 0.2s ease;
}

.proof-inline-link:hover {
  transform: translateY(-2px);
  background: rgba(66, 215, 210, 0.12);
}

.proof-video-feature span,
.proof-book-photo span,
.proof-instagram span {
  color: var(--aqua);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.proof-video-feature h3,
.proof-book-photo h3,
.proof-instagram h3 {
  margin: 10px 0;
  font-size: clamp(22px, 2.2vw, 32px);
  line-height: 1.06;
}

.proof-video-feature p,
.proof-book-photo p,
.proof-instagram p,
.proof-video-grid p {
  margin: 0;
  color: rgba(255, 255, 255, 0.74);
}

.proof-side {
  display: grid;
  gap: 18px;
}

.proof-book-photo {
  display: grid;
  grid-template-columns: 0.86fr 1fr;
  gap: 18px;
  align-items: center;
  padding: 22px;
}

.proof-book-photo img {
  width: 100%;
  max-height: 210px;
  object-fit: contain;
  filter: drop-shadow(0 18px 28px rgba(16, 17, 39, 0.18));
}

.proof-book-photo h3,
.proof-instagram h3 {
  color: var(--ink);
}

.proof-book-photo p,
.proof-instagram p,
.proof-video-grid p {
  color: var(--muted);
}

.proof-instagram {
  padding: 26px;
  background:
    linear-gradient(135deg, rgba(119, 49, 75, 0.96), rgba(18, 11, 46, 0.94)),
    radial-gradient(circle at 86% 12%, rgba(233, 190, 105, 0.24), transparent 42%);
  color: #fff;
}

.proof-instagram h3,
.proof-instagram p {
  color: #fff;
}

.proof-instagram p {
  color: rgba(255, 255, 255, 0.75);
}

.proof-instagram .button {
  width: fit-content;
  min-width: 190px;
  margin-top: 22px;
}

.proof-video-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.proof-video-grid article {
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(16, 17, 39, 0.88), rgba(38, 28, 72, 0.92));
}

.proof-short-grid {
  align-items: stretch;
}

.proof-short-card {
  position: relative;
  display: grid;
  overflow: hidden;
  align-content: start;
  min-height: 100%;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 80% 0%, rgba(66, 215, 210, 0.16), transparent 36%),
    linear-gradient(180deg, rgba(16, 17, 39, 0.92), rgba(38, 28, 72, 0.95));
  color: #fff;
  text-decoration: none;
  box-shadow: 0 22px 54px rgba(16, 17, 39, 0.18);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.proof-short-card:hover {
  transform: translateY(-5px);
  border-color: rgba(66, 215, 210, 0.4);
  box-shadow: 0 30px 70px rgba(16, 17, 39, 0.24);
}

.proof-short-card img {
  width: 100%;
  height: 210px;
  object-fit: cover;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  filter: saturate(1.08) contrast(0.96);
}

.proof-short-card::after {
  content: "Assistir";
  position: absolute;
  top: 154px;
  right: 14px;
  display: inline-flex;
  min-height: 38px;
  align-items: center;
  padding: 0 14px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--gold), #ffe7a4);
  color: var(--ink);
  font-weight: 900;
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.22);
}

.proof-short-card span {
  margin: 18px 18px 6px;
  color: var(--aqua);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.proof-short-card p {
  margin: 0;
  padding: 0 18px 20px;
  color: rgba(255, 255, 255, 0.76);
  font-size: 0.94rem;
  line-height: 1.42;
}

.proof-photo-grid article {
  display: grid;
  min-height: 100%;
}

.proof-photo-grid img {
  width: 100%;
  height: 230px;
  object-fit: contain;
  padding: 18px;
  background:
    radial-gradient(circle at 50% 20%, rgba(66, 215, 210, 0.18), transparent 44%),
    linear-gradient(135deg, rgba(255, 250, 235, 0.94), rgba(237, 255, 252, 0.88));
  border-bottom: 1px solid rgba(255, 255, 255, 0.13);
}

.proof-mini-cta {
  display: flex;
  min-height: 100%;
  flex-direction: column;
  justify-content: center;
  gap: 12px;
  padding: 22px;
  color: #fff;
  text-decoration: none;
  background:
    radial-gradient(circle at 88% 10%, rgba(233, 190, 105, 0.24), transparent 38%),
    linear-gradient(135deg, rgba(66, 215, 210, 0.18), rgba(119, 49, 75, 0.32));
}

.proof-mini-cta span {
  color: var(--aqua);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.proof-mini-cta strong {
  max-width: 18ch;
  font-size: 1.25rem;
  line-height: 1.14;
}

.proof-video-grid video {
  height: 260px;
  aspect-ratio: auto;
  border: 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 0;
}

.proof-video-grid p {
  padding: 14px;
  color: rgba(255, 255, 255, 0.76);
  font-size: 0.92rem;
  line-height: 1.38;
}

.authors {
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  gap: 58px;
  align-items: center;
  width: 100%;
  margin: 0;
  padding: 92px max(20px, calc((100vw - 1120px) / 2));
}

.author-photos {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.author-photos img {
  width: 100%;
  aspect-ratio: 0.78 / 1;
  object-fit: cover;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.author-photos img:nth-child(2) {
  margin-top: 46px;
}

.credentials {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 24px;
}

.credentials article {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-2);
}

.credentials h3 {
  font-size: 22px;
}

.credentials p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.video-section {
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  gap: 58px;
  align-items: center;
  padding: 92px max(20px, calc((100vw - 1120px) / 2));
  background: linear-gradient(135deg, var(--deep), var(--deep-2));
}

.video-frame {
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line-light);
  border-radius: var(--radius);
  background: #05050d;
  box-shadow: 0 24px 58px rgba(0, 0, 0, 0.32);
}

.video-frame iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

.faq-list {
  display: grid;
  gap: 12px;
  width: min(820px, calc(100% - 40px));
  margin: 0 auto;
}

.faq-item {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-2);
}

.faq-item button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: 18px;
  padding: 22px 24px;
  border: 0;
  color: var(--ink);
  background: transparent;
  font-weight: 900;
  text-align: left;
  cursor: pointer;
}

.faq-item i {
  transition: transform 180ms ease;
}

.faq-item button[aria-expanded="true"] i {
  transform: rotate(180deg);
}

.faq-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 220ms ease;
}

.faq-item button[aria-expanded="true"] + .faq-content {
  max-height: 260px;
}

.faq-content p {
  margin: 0;
  padding: 0 24px 22px;
  color: var(--muted);
}

.final-cta {
  display: grid;
  grid-template-columns: minmax(260px, 400px) 1fr;
  gap: 52px;
  align-items: center;
  padding: 82px max(20px, calc((100vw - 1120px) / 2)) 116px;
  background:
    linear-gradient(90deg, rgba(9, 7, 25, 0.96), rgba(33, 17, 68, 0.92)),
    url("../assets/livro/autores-com-livros.webp") center / cover no-repeat;
}

.final-cta img {
  filter: drop-shadow(0 26px 42px rgba(0, 0, 0, 0.32));
}

.sticky-cta {
  position: fixed;
  z-index: 24;
  left: 50%;
  bottom: 18px;
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 10px 10px 10px 18px;
  color: #fff;
  border: 1px solid var(--line-light);
  border-radius: 999px;
  background: rgba(9, 7, 25, 0.92);
  box-shadow: 0 20px 46px rgba(0, 0, 0, 0.24);
  backdrop-filter: blur(18px);
  transform: translate(-50%, calc(100% + 40px));
  transition: transform 220ms ease;
}

.sticky-cta.is-visible {
  transform: translate(-50%, 0);
}

.sticky-cta span {
  white-space: nowrap;
  font-size: 14px;
}

.sticky-cta a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 18px;
  color: #171028;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--gold-2), var(--gold));
  font-size: 13px;
  font-weight: 900;
  text-transform: uppercase;
}

.exit-popup {
  position: fixed;
  z-index: 60;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.exit-popup.is-open {
  display: flex;
}

.exit-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(5, 4, 14, 0.74);
  backdrop-filter: blur(8px);
}

.exit-panel {
  position: relative;
  width: min(760px, 100%);
  overflow: hidden;
  padding: 34px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius);
  color: #fff;
  background:
    linear-gradient(135deg, rgba(9, 7, 25, 0.98), rgba(119, 49, 75, 0.92)),
    linear-gradient(90deg, rgba(66, 215, 210, 0.18), rgba(233, 190, 105, 0.16));
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.44);
}

.exit-panel::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -78px;
  width: 310px;
  height: 230px;
  background: url("../assets/livro/livros-combo.webp") center / contain no-repeat;
  opacity: 0.26;
  pointer-events: none;
}

.exit-copy,
.coupon-form,
.coupon-result {
  position: relative;
  z-index: 1;
}

.exit-copy {
  max-width: 560px;
}

.exit-copy h2 {
  margin: 10px 0 0;
  color: #fff;
  font-family: "Playfair Display", Georgia, serif;
  font-size: clamp(34px, 5vw, 52px);
  line-height: 1.04;
}

.exit-copy p {
  max-width: 520px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 17px;
}

.exit-close {
  position: absolute;
  z-index: 2;
  top: 14px;
  right: 14px;
  width: 40px;
  height: 40px;
  border: 0;
  border-radius: 999px;
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
  cursor: pointer;
}

.coupon-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr)) auto;
  gap: 12px;
  align-items: end;
  margin-top: 26px;
}

.coupon-form label {
  display: grid;
  gap: 7px;
}

.coupon-form span {
  color: rgba(255, 255, 255, 0.78);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.coupon-form input {
  width: 100%;
  min-height: 54px;
  padding: 0 15px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius);
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
  outline: 0;
}

.coupon-form input::placeholder {
  color: rgba(255, 255, 255, 0.48);
}

.coupon-form input:focus {
  border-color: rgba(66, 215, 210, 0.78);
  box-shadow: 0 0 0 3px rgba(66, 215, 210, 0.16);
}

.coupon-form .coupon-consent {
  grid-column: 1 / -1;
  display: flex;
  align-items: flex-start;
  gap: 9px;
  max-width: 720px;
}

.coupon-form .coupon-consent input {
  flex: 0 0 auto;
  width: 18px;
  min-height: 18px;
  height: 18px;
  margin-top: 1px;
  padding: 0;
  accent-color: #42d7d2;
}

.coupon-form .coupon-consent span {
  color: rgba(255, 255, 255, 0.82);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: 0;
  text-transform: none;
}

.coupon-form .coupon-consent a {
  color: #f4ca68;
  text-underline-offset: 3px;
}

.form-hp {
  display: none;
}

.form-message {
  grid-column: 1 / -1;
  min-height: 22px;
  margin: 0;
  color: var(--gold);
  font-size: 13px;
  font-weight: 800;
}

.form-message.is-error {
  color: #ffb3b3;
}

.coupon-result {
  display: grid;
  gap: 10px;
  width: min(430px, 100%);
  margin-top: 24px;
  padding: 20px;
  border: 1px dashed rgba(233, 190, 105, 0.72);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.08);
}

.coupon-result[hidden] {
  display: none;
}

.coupon-result span,
.coupon-result small {
  color: rgba(255, 255, 255, 0.78);
}

.coupon-result strong {
  color: var(--gold);
  font-size: 34px;
  letter-spacing: 0.08em;
}

@media (max-width: 1080px) {
  .book-header {
    grid-template-columns: auto auto;
  }

  .site-nav,
  .header-cta {
    display: none;
  }

  .menu-button {
    display: grid;
    place-items: center;
    justify-self: end;
  }

  .site-nav.is-open {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    display: grid;
    gap: 0;
    overflow: hidden;
    border: 1px solid var(--line-light);
    border-radius: 18px;
    background: rgba(9, 7, 25, 0.96);
  }

  .site-nav.is-open a {
    padding: 16px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .hero-inner {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    min-height: 260px;
  }

  .intro-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .book-feeling,
  .delivery-panel,
  .proof-showcase,
  .proof-video-feature,
  .proof-book-photo,
  .authors,
  .video-section,
  .final-cta {
    grid-template-columns: 1fr;
  }

  .offer-grid {
    grid-template-columns: 1fr;
  }

  .price-card {
    min-height: auto;
  }

  .proof-video-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .proof-short-card img {
    height: 230px;
  }

  .volume-grid {
    grid-template-columns: 1fr;
  }

  .systemic-metrics {
    grid-template-columns: repeat(3, 1fr);
  }

  .systemic-metrics article:nth-child(3) {
    border-right: 0;
  }

  .systemic-metrics article:nth-child(-n + 3) {
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  }

  .systemic-topics {
    grid-template-columns: 1fr;
  }

  .hero-book-badge {
    position: relative;
    right: auto;
    bottom: auto;
    margin: 22px auto 0;
  }

  .coupon-form {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .book-header {
    width: calc(100% - 30px);
    margin-top: 10px;
  }

  .brand {
    min-width: 0;
  }

  .brand span {
    display: none;
  }

  .book-hero {
    min-height: 0;
    padding: 104px 0 40px;
    background:
      linear-gradient(90deg, rgba(7, 6, 20, 0.98) 0%, rgba(16, 10, 43, 0.9) 52%, rgba(8, 38, 49, 0.66) 100%),
      linear-gradient(180deg, rgba(7, 6, 20, 0.18) 34%, rgba(7, 6, 20, 0.94) 100%),
      url("../assets/livro/rosana-livro.webp") right -64px top 78px / auto 280px no-repeat,
      url("../assets/livro/jose-luiz-livro.webp") right 126px top 92px / auto 245px no-repeat,
      var(--deep);
  }

  .book-hero::after {
    background:
      linear-gradient(90deg, rgba(9, 7, 25, 0.78), rgba(9, 7, 25, 0.38)),
      linear-gradient(180deg, rgba(9, 7, 25, 0) 48%, rgba(9, 7, 25, 0.9) 100%);
  }

  .hero-copy h1 {
    max-width: 92%;
    font-size: 36px;
  }

  .hero-copy p {
    font-size: 16px;
    max-width: 88%;
  }

  .hero-actions,
  .final-actions {
    display: grid;
  }

  .button {
    width: 100%;
  }

  .hero-visual {
    min-height: 0;
    margin-top: 16px;
  }

  .hero-book-badge {
    position: relative;
    right: auto;
    grid-template-columns: 120px 1fr;
    width: 100%;
  }

  .hero-book-badge img {
    width: 120px;
  }

  .hero-book-badge strong {
    font-size: 30px;
  }

  .hero-strip,
  .delivery-row,
  .delivery-steps,
  .credentials,
  .intro-grid,
  .systemic-metrics {
    grid-template-columns: 1fr;
  }

  .hero-strip article {
    padding: 18px;
    border-right: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  }

  .hero-strip article:last-child {
    border-bottom: 0;
  }

  .systemic-metrics article,
  .systemic-metrics article:nth-child(3),
  .systemic-metrics article:nth-child(-n + 3) {
    border-right: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  }

  .systemic-metrics article:last-child {
    border-bottom: 0;
  }

  .intro,
  .systemic-value,
  .volumes,
  .delivery,
  .faq,
  .book-feeling,
  .social-proof,
  .authors,
  .video-section {
    padding-top: 66px;
    padding-bottom: 66px;
  }

  .section-heading {
    margin-bottom: 38px;
    text-align: left;
  }

  .section-heading h2,
  .feeling-copy h2,
  .offer-copy h2,
  .delivery-panel h2,
  .authors-copy h2,
  .video-copy h2,
  .final-cta h2 {
    font-size: 35px;
  }

  .volume-panel {
    grid-template-columns: 112px 1fr;
    gap: 18px;
    padding: 20px;
  }

  .volume-panel img {
    width: 112px;
  }

  .volume-panel h3,
  .price-card h3 {
    font-size: 23px;
  }

  .offer-cover {
    width: min(140px, 70%);
    height: 172px;
  }

  .offer-cover-combo {
    width: min(260px, 92%);
    height: 144px;
  }

  .proof-heading h2 {
    font-size: 35px;
  }

  .proof-video-feature {
    padding: 14px;
  }

  .proof-video-feature > div {
    padding: 0;
  }

  .proof-youtube-feature > .youtube-frame {
    min-height: 420px;
    padding: 0;
  }

  .proof-youtube-feature > div:not(.youtube-frame) {
    padding: 8px 0 2px;
  }

  .youtube-frame iframe {
    min-height: 420px;
  }

  .proof-video-grid {
    grid-template-columns: 1fr;
  }

  .proof-short-card img {
    height: 220px;
  }

  .proof-video-grid video {
    height: auto;
    aspect-ratio: 9 / 16;
    max-height: 520px;
  }

  .delivery-row {
    gap: 12px;
    margin-top: 44px;
  }

  .author-photos img:nth-child(2) {
    margin-top: 28px;
  }

  .sticky-cta {
    left: 12px;
    right: 12px;
    justify-content: space-between;
    transform: translateY(calc(100% + 40px));
  }

  .sticky-cta.is-visible {
    transform: translateY(0);
  }

  .sticky-cta span {
    white-space: normal;
    font-size: 12px;
  }

  .sticky-cta a {
    flex: 0 0 auto;
  }

  .exit-panel {
    max-height: calc(100vh - 34px);
    overflow-y: auto;
    padding: 28px 18px;
  }

}

@media (max-width: 500px) {
  .hero-copy h1 {
    max-width: 100%;
    font-size: 34px;
  }

  .book-hero {
    background:
      linear-gradient(90deg, rgba(7, 6, 20, 0.98) 0%, rgba(16, 10, 43, 0.94) 58%, rgba(8, 38, 49, 0.68) 100%),
      linear-gradient(180deg, rgba(7, 6, 20, 0.22) 34%, rgba(7, 6, 20, 0.96) 100%),
      url("../assets/livro/rosana-livro.webp") right -82px top 76px / auto 245px no-repeat,
      url("../assets/livro/jose-luiz-livro.webp") right 76px top 96px / auto 218px no-repeat,
      var(--deep);
  }

  .hero-proof {
    display: grid;
  }

  .hero-book-badge {
    width: 100%;
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-book-badge img {
    justify-self: center;
  }

  .volume-panel {
    grid-template-columns: 1fr;
  }

  .volume-panel img {
    width: min(190px, 68%);
  }

  .price strong {
    font-size: 48px;
  }

  .author-photos {
    grid-template-columns: 1fr;
  }

  .author-photos img:nth-child(2) {
    margin-top: 0;
  }

  .sticky-cta {
    display: none;
  }
}
/* Performance: preserve section geometry while deferring offscreen rendering. */
#obra,
.systemic-value,
.book-feeling,
#volumes,
#oferta,
.delivery,
#provas,
#autores,
.video-section,
#faq,
.final-cta {
  content-visibility: auto;
  contain-intrinsic-size: auto 820px;
}

/* Product visibility and mobile layout, September 2026. */
.mobile-product{display:none}
.desktop-product{position:absolute;bottom:0;right:0;width:250px;margin:0;padding:16px;border:1px solid #ffffff30;border-radius:16px;background:#0c1022ed;box-shadow:0 16px 40px #0004}
.desktop-product img{display:block;width:100%;height:auto;object-fit:contain}
.desktop-product figcaption{text-align:center;font-size:13px;color:#f4cd7b;margin-top:8px}
@media(max-width:1080px){
 .book-hero{min-height:0;background:radial-gradient(ellipse at 90% 15%,#12333c 0%,#101027 48%,#090719 85%)}
 .book-hero::after{background:none;pointer-events:none}
 .hero-inner{gap:0}
 .hero-copy{width:100%;max-width:680px;margin:auto}
 .hero-visual{display:none}
 .mobile-product{display:block;width:min(300px,78%);margin:18px auto 20px}
 .mobile-product img{display:block;width:100%;height:auto;object-fit:contain}
 .hero-strip{margin-top:32px}
 .hero-copy h1{max-width:100%;font-size:clamp(30px,5vw,48px);line-height:1.12;margin-top:12px}
 .hero-copy p{max-width:100%}
}
@media(max-width:760px){
 .book-header{gap:10px;padding:8px 12px;background:#0c0b20f5}
 .brand span{display:block;min-width:0}
 .brand strong{font-size:13px}
 .brand small{font-size:11px}
 .brand img{width:36px;height:36px;flex-shrink:0}
 .menu-button{padding:10px 14px;min-height:44px}
 .book-hero{padding-top:100px;padding-bottom:32px}
 .hero-inner{width:calc(100% - 36px)}
 .hero-copy h1{font-size:clamp(28px,7.2vw,36px);line-height:1.13}
 .hero-copy p{margin-top:18px;line-height:1.6}
 .mobile-product{width:min(260px,74%);margin:14px auto 18px}
 .hero-actions{margin-top:22px;gap:12px}
 .hero-proof{display:flex;flex-wrap:wrap;gap:12px 18px;margin-top:22px;font-size:12px}
 .hero-strip{width:calc(100% - 36px);margin-top:28px}
 .hero-strip article{padding:16px 18px}
 .hero-strip strong{font-size:22px}
 .hero-strip span{font-size:14px}
 .section-heading h2,.feeling-copy h2,.offer-copy h2,.delivery-panel h2,.authors-copy h2,.video-copy h2,.final-cta h2,.proof-heading h2{font-size:clamp(27px,7.5vw,35px);line-height:1.15;overflow-wrap:break-word}
 .hero-copy,.volume-panel,.price-card,.offer-copy,.delivery-panel,.authors-copy,.video-copy{min-width:0} section[id]{scroll-margin-top:100px} #obra,.systemic-value,.book-feeling,#volumes,#oferta,.delivery,#provas,#autores,.video-section,#faq,.final-cta{content-visibility:visible;contain-intrinsic-size:none}
 .proof-youtube-feature>.youtube-frame,.youtube-frame iframe{min-height:0;aspect-ratio:16/9;height:auto}
 .button{min-height:48px;white-space:normal;text-align:center}
}