/* ==========================================================================
   Mente de Valor Delas — tema sobre o Bootstrap 5.3
   Paleta: marrom #2C1810 · terracota #C4704D · creme #F5F1EB
   ========================================================================== */

:root {
  --ink: #2C1810;
  --ink-soft: #3A2117;
  --brand: #C4704D;
  --brand-dark: #B66544;
  --brand-darker: #A85E40;
  --cream: #F5F1EB;
  --cream-deep: #EFE8DF;
  --surface: #ffffff;
  --ink-70: rgba(44, 24, 16, .7);
  --ink-60: rgba(44, 24, 16, .6);
  --ink-45: rgba(44, 24, 16, .45);
  --hairline: rgba(44, 24, 16, .09);

  /* largura útil: o problema do layout anterior era um container largo
     demais com conteúdo alinhado à esquerda */
  --shell: 1120px;
  --gutter: 24px;

  --bs-body-font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --bs-body-color: var(--ink);
  --bs-body-bg: var(--cream);
}

* { -webkit-tap-highlight-color: transparent; }

body {
  background: var(--cream);
  color: var(--ink);
  font-family: var(--bs-body-font-family);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection { background: rgba(196, 112, 77, .22); }

html { scroll-behavior: smooth; scroll-padding-top: 90px; }

/* Container único e centralizado em toda a página --------------------- */
.container {
  width: 100%;
  max-width: calc(var(--shell) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
@media (min-width: 768px) { :root { --gutter: 32px; } }
@media (min-width: 1200px) { :root { --gutter: 40px; } }

/* ---------- tipografia ---------- */
.display-hero {
  font-family: 'Fraunces', Georgia, serif;
  font-weight: 600;
  font-size: clamp(2.1rem, 4.6vw, 3.5rem);
  line-height: 1.04;
  letter-spacing: -.022em;
  margin: 1rem 0 0;
  text-wrap: balance;
}

.section-title {
  font-family: 'Fraunces', Georgia, serif;
  font-weight: 600;
  font-size: clamp(1.6rem, 3.2vw, 2.4rem);
  line-height: 1.12;
  letter-spacing: -.02em;
  margin: .75rem 0 0;
  text-wrap: balance;
}

.lead-muted {
  font-size: clamp(1rem, 1.4vw, 1.1rem);
  line-height: 1.65;
  color: var(--ink-70);
  margin: 1.25rem 0 0;
  max-width: 46ch;
}

.eyebrow {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--brand);
}

/* Cabeçalho de seção: centralizado — era a causa do "tudo encostado
   na esquerda" com um vazio enorme à direita. */
.section-head {
  max-width: 620px;
  margin-inline: auto;
  margin-bottom: clamp(2.5rem, 5vw, 3.5rem);
  text-align: center;
}
.section-head .section-sub {
  color: var(--ink-60);
  font-size: 15.5px;
  line-height: 1.6;
  margin: 1rem 0 0;
}
.section-head--light .section-title { color: var(--cream); }
.section-head--light .section-sub { color: rgba(245, 241, 235, .65); }

/* ---------- botões ---------- */
.btn-brand {
  --bs-btn-color: #fff;
  --bs-btn-bg: var(--brand);
  --bs-btn-border-color: var(--brand);
  --bs-btn-hover-bg: var(--brand-dark);
  --bs-btn-hover-border-color: var(--brand-dark);
  --bs-btn-active-bg: var(--brand-darker);
  --bs-btn-active-border-color: var(--brand-darker);
  --bs-btn-disabled-bg: var(--brand);
  --bs-btn-disabled-border-color: var(--brand);
  --bs-btn-hover-color: #fff;
  --bs-btn-active-color: #fff;
  --bs-btn-disabled-color: #fff;
  border-radius: 999px;
  font-weight: 600;
  padding: .9rem 2rem;
  box-shadow: 0 10px 26px -12px rgba(196, 112, 77, .85);
  transition: transform .16s ease, box-shadow .16s ease, background-color .16s ease;
}
.btn-brand:hover { transform: translateY(-2px); box-shadow: 0 16px 32px -14px rgba(196, 112, 77, .9); }
.btn-brand:active { transform: translateY(0); }
.btn-brand:disabled { opacity: .65; box-shadow: none; transform: none; }
.btn-brand.btn-lg { padding: 1.05rem 2.4rem; font-size: 1.02rem; }
.btn-brand.btn-sm { padding: .55rem 1.15rem; font-size: 13.5px; box-shadow: none; }

.btn-outline-brand {
  border-radius: 999px;
  font-weight: 600;
  color: var(--brand);
  border: 1px solid rgba(196, 112, 77, .4);
  background: transparent;
  padding: .8rem 1.6rem;
}
.btn-outline-brand:hover { background: rgba(196, 112, 77, .08); color: var(--brand-dark); }

.btn-link-back {
  background: none; border: 0; color: var(--ink-45);
  font-size: 14px; padding: 0;
}
.btn-link-back:hover { color: var(--ink); }

/* ---------- barra superior ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 1030;
  background: rgba(245, 241, 235, .82);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease, background .2s ease;
}
.topbar.is-stuck { border-bottom-color: var(--hairline); }
.topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  min-height: 66px;
}
.topbar__cta { white-space: nowrap; }
.topbar__brand {
  display: inline-flex; align-items: center; gap: .55rem;
  min-width: 0; overflow: hidden; text-overflow: ellipsis;
  font-family: 'Fraunces', Georgia, serif;
  font-size: 1.02rem; font-weight: 600;
  color: var(--ink); text-decoration: none;
  white-space: nowrap;
}
.topbar__mark {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--brand); flex: none;
}
.topbar__links { display: flex; gap: 1.75rem; }
.topbar__links a {
  font-size: 14px; color: var(--ink-60);
  text-decoration: none; transition: color .15s ease;
}
.topbar__links a:hover { color: var(--brand); }

/* ---------- hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(3rem, 7vw, 5.5rem) 0 clamp(3.5rem, 8vw, 6rem);
}
.hero__glow { position: absolute; border-radius: 50%; filter: blur(90px); pointer-events: none; }
.hero__glow--a { width: 420px; height: 420px; background: rgba(196, 112, 77, .18); top: -180px; right: -120px; }
.hero__glow--b { width: 340px; height: 340px; background: rgba(44, 24, 16, .07); bottom: -180px; left: -140px; }

.hero__cta {
  display: flex; flex-wrap: wrap; align-items: center;
  gap: 1rem 1.25rem; margin-top: 2rem;
}
.price-hint { font-size: 14px; color: var(--ink-60); }

.trust-list {
  list-style: none; padding: 0;
  margin: 2rem 0 0;
  display: flex; flex-wrap: wrap; gap: .75rem 1.5rem;
  font-size: 13.5px; color: var(--ink-60);
}
.trust-list i { color: var(--brand); margin-right: .35rem; }

/* ---------- capa ---------- */
.book-frame {
  position: relative;
  display: flex; justify-content: center;
  perspective: 1400px;
  padding: 1rem 0;
}
.book-cover {
  width: min(300px, 76vw);
  aspect-ratio: 3 / 4.3;
  background:
    radial-gradient(120% 80% at 20% 0%, rgba(196, 112, 77, .22), transparent 60%),
    linear-gradient(155deg, var(--ink-soft) 0%, var(--ink) 55%, #1a0d07 100%);
  border-radius: 5px 16px 16px 5px;
  box-shadow:
    0 50px 90px -34px rgba(44, 24, 16, .6),
    inset 3px 0 0 rgba(255, 255, 255, .08),
    inset -1px 0 0 rgba(0, 0, 0, .3);
  padding: 2.2rem 1.9rem;
  display: flex; flex-direction: column; justify-content: space-between;
  transform: rotateY(-13deg) rotateX(3deg);
  transition: transform .55s cubic-bezier(.2, .8, .2, 1);
  text-align: left;
}
.book-cover:hover { transform: rotateY(-5deg) rotateX(1deg) translateY(-8px); }
.book-cover__brand {
  font-size: 9.5px; letter-spacing: .26em; text-transform: uppercase;
  color: var(--brand); font-weight: 600;
}
.book-cover__center { margin-top: auto; }
.book-cover__title {
  display: block;
  font-family: 'Fraunces', Georgia, serif;
  font-size: clamp(1.7rem, 4vw, 2.1rem);
  line-height: 1.02; color: var(--cream);
}
.book-cover__rule { display: block; width: 38px; height: 3px; background: var(--brand); margin: 1rem 0; }
.book-cover__sub { font-size: 12.5px; line-height: 1.5; color: rgba(245, 241, 235, .6); }
.book-cover__foot {
  margin-top: 1.5rem;
  font-size: 10px; letter-spacing: .18em; text-transform: uppercase;
  color: rgba(245, 241, 235, .4);
}

.book-badge {
  position: absolute; right: max(6%, 8px); bottom: 4%;
  background: var(--surface);
  border-radius: 16px;
  padding: .75rem 1.15rem;
  box-shadow: 0 18px 40px -18px rgba(44, 24, 16, .45);
  text-align: center;
}
.book-badge strong {
  display: block;
  font-family: 'Fraunces', Georgia, serif;
  font-size: 1.35rem; line-height: 1; color: var(--ink);
}
.book-badge span { font-size: 10.5px; letter-spacing: .06em; color: var(--ink-45); }

/* ---------- seções ---------- */
.section { padding: clamp(3.5rem, 7.5vw, 6rem) 0; }
.section--alt { background: var(--surface); }
.section--dark { background: var(--ink); color: var(--cream); }

/* ---------- declaração 50-50 ---------- */
.statement { max-width: 720px; margin-inline: auto; text-align: center; }
.statement__title {
  font-family: 'Fraunces', Georgia, serif;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  line-height: 1.08; letter-spacing: -.02em;
  margin: .75rem 0 0;
}
.statement__text {
  color: var(--ink-70); font-size: clamp(1rem, 1.4vw, 1.1rem);
  line-height: 1.65; margin: 1.25rem auto 0; max-width: 54ch;
}

.equation {
  display: flex; align-items: center; justify-content: center;
  flex-wrap: wrap; gap: 1rem 1.75rem;
  margin-top: 2.5rem;
}
.equation__item {
  border-radius: 18px; padding: 1.25rem 1.75rem;
  min-width: 200px;
}
.equation__item--bad { background: rgba(44, 24, 16, .05); }
.equation__item--good { background: rgba(196, 112, 77, .1); }
.equation__math {
  display: block;
  font-family: 'Fraunces', Georgia, serif;
  font-size: 1.75rem; line-height: 1;
}
.equation__item--bad .equation__math { color: var(--ink-45); text-decoration: line-through; }
.equation__item--good .equation__math { color: var(--brand); }
.equation__label { display: block; font-size: 12.5px; color: var(--ink-60); margin-top: .5rem; }
.equation__arrow { font-size: 1.3rem; color: var(--brand); }

/* ---------- cards ---------- */
.card-soft {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: 22px;
  padding: 2rem 1.9rem;
  transition: transform .2s ease, box-shadow .2s ease;
}
.section--alt .card-soft { background: var(--cream); }
.card-soft:hover { transform: translateY(-4px); box-shadow: 0 24px 48px -26px rgba(44, 24, 16, .3); }
.card-soft__icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 48px; height: 48px; border-radius: 15px;
  background: rgba(196, 112, 77, .1); color: var(--brand); font-size: 21px;
}
.card-soft__title { font-size: 1.12rem; font-weight: 600; margin: 1.15rem 0 .5rem; }
.card-soft__text { color: var(--ink-60); font-size: 15px; line-height: 1.65; margin: 0; }

/* ---------- sinais (seção escura) ---------- */
.signals {
  max-width: 760px; margin-inline: auto;
  display: grid; gap: .75rem;
}
.signal {
  display: flex; align-items: flex-start; gap: 1rem;
  background: rgba(245, 241, 235, .05);
  border: 1px solid rgba(245, 241, 235, .09);
  border-radius: 16px;
  padding: 1.1rem 1.35rem;
  transition: border-color .2s ease, background .2s ease;
}
.signal:hover { background: rgba(245, 241, 235, .08); border-color: rgba(196, 112, 77, .4); }
.signal__num {
  flex: none;
  width: 26px; height: 26px; border-radius: 50%;
  background: rgba(196, 112, 77, .18); color: var(--brand);
  display: flex; align-items: center; justify-content: center;
  font-size: 12.5px; font-weight: 600;
}
.signal__text { font-size: 15px; line-height: 1.55; color: rgba(245, 241, 235, .88); }

/* ---------- capítulos ---------- */
.sticky-side { position: sticky; top: 100px; }
.meta-pill {
  display: inline-flex; align-items: center; gap: .5rem;
  background: rgba(196, 112, 77, .1); color: var(--brand);
  border-radius: 999px; padding: .5rem 1rem;
  font-size: 13px; font-weight: 600;
}

.chapter-list { list-style: none; padding: 0; margin: 0; }
.chapter-list li {
  display: flex; gap: 1.25rem; align-items: baseline;
  padding: 1.1rem .25rem;
  border-bottom: 1px solid var(--hairline);
}
.chapter-list li:first-child { padding-top: 0; }
.chapter-list li:last-child { border-bottom: 0; padding-bottom: 0; }
.chapter-list__tag {
  flex: none; min-width: 92px;
  font-size: 10.5px; font-weight: 600;
  letter-spacing: .12em; text-transform: uppercase;
  color: var(--brand);
}
.chapter-list__text { font-size: 16px; line-height: 1.5; }

/* ---------- para quem é ---------- */
.fit-card {
  border-radius: 22px; padding: 2rem 1.9rem;
  border: 1px solid var(--hairline);
  background: var(--surface);
}
.section--alt .fit-card { background: var(--cream); }
.fit-card h3 {
  display: flex; align-items: center; gap: .6rem;
  font-size: 1.05rem; font-weight: 600; margin: 0 0 1.25rem;
}
.fit-card ul { list-style: none; padding: 0; margin: 0; }
.fit-card li {
  position: relative;
  padding: .55rem 0 .55rem 1.5rem;
  font-size: 15px; line-height: 1.55; color: var(--ink-70);
}
.fit-card li::before {
  content: ''; position: absolute; left: 0; top: 1.1rem;
  width: 6px; height: 6px; border-radius: 50%;
}
.fit-card--yes h3 i { color: #3f9d6d; }
.fit-card--yes li::before { background: #3f9d6d; }
.fit-card--yes { border-color: rgba(63, 157, 109, .28); }
.fit-card--no h3 i { color: var(--ink-45); }
.fit-card--no li::before { background: rgba(44, 24, 16, .25); }

/* ---------- depoimentos ---------- */
.quote {
  background: var(--surface); border: 1px solid var(--hairline);
  border-radius: 22px; padding: 2rem 1.8rem; margin: 0;
  display: flex; flex-direction: column;
}
.section--alt .quote { background: var(--cream); }
.quote__mark { font-size: 26px; color: rgba(196, 112, 77, .35); }
.quote blockquote { font-size: 15.5px; line-height: 1.65; margin: .75rem 0 1.5rem; flex: 1; }
.quote figcaption { border-top: 1px solid var(--hairline); padding-top: 1rem; font-size: 14px; }
.quote figcaption strong { display: block; }
.quote figcaption span { color: var(--ink-45); font-size: 13px; }

/* ---------- oferta ---------- */
.offer {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  border-radius: 30px;
  overflow: hidden;
  box-shadow: 0 34px 80px -34px rgba(44, 24, 16, .4);
  max-width: 980px;
  margin-inline: auto;
}
.offer__left {
  background:
    radial-gradient(110% 90% at 100% 0%, rgba(196, 112, 77, .2), transparent 58%),
    var(--ink);
  color: var(--cream);
  padding: clamp(2rem, 4vw, 3rem);
}
.offer__title {
  font-family: 'Fraunces', Georgia, serif;
  font-size: clamp(1.6rem, 3vw, 2.15rem);
  margin: .75rem 0 0;
}
.offer__text { color: rgba(245, 241, 235, .7); font-size: 15px; line-height: 1.65; margin: 1rem 0 0; }
.offer__list { list-style: none; padding: 0; margin: 1.75rem 0 0; }
.offer__list li {
  display: flex; gap: .7rem; align-items: flex-start;
  padding: .45rem 0; font-size: 15px; color: rgba(245, 241, 235, .9);
}
.offer__list i { color: var(--brand); margin-top: .2rem; }

.offer__right {
  background: var(--surface);
  padding: clamp(2rem, 4vw, 3rem);
  display: flex; flex-direction: column; justify-content: center;
  text-align: center;
}
.offer__price-label { font-size: 11px; letter-spacing: .2em; text-transform: uppercase; color: var(--ink-45); }
.offer__price {
  font-family: 'Fraunces', Georgia, serif;
  font-size: clamp(2.6rem, 5.5vw, 3.4rem); line-height: 1; margin-top: .4rem;
}
.offer__installment { color: var(--ink-60); font-size: 14px; margin-top: .5rem; }
.offer__methods {
  display: flex; flex-wrap: wrap; justify-content: center; gap: .25rem 1rem;
  margin-top: 1.1rem; font-size: 12.5px; color: var(--ink-45);
}
.offer__methods i { margin-right: .25rem; }

.guarantee {
  display: flex; align-items: flex-start; gap: .75rem;
  text-align: left;
  margin-top: 1.5rem; padding-top: 1.25rem;
  border-top: 1px solid var(--hairline);
  font-size: 12.5px; line-height: 1.5; color: var(--ink-60);
}
.guarantee i { color: var(--brand); font-size: 20px; margin-top: .1rem; }
.guarantee strong { display: block; color: var(--ink); font-size: 13px; }

@media (max-width: 767.98px) {
  .offer { grid-template-columns: 1fr; }
}

/* ---------- FAQ ---------- */
.faq {
  max-width: 740px; margin-inline: auto;
  --bs-accordion-border-color: var(--hairline);
}
.faq .accordion-item { background: transparent; border-bottom: 1px solid var(--hairline); }
.faq .accordion-button {
  background: transparent; font-weight: 600; font-size: 16px;
  color: var(--ink); padding: 1.3rem 0; box-shadow: none;
}
.faq .accordion-button:not(.collapsed) { color: var(--brand); }
.faq .accordion-button::after { filter: sepia(1) saturate(3) hue-rotate(-15deg); margin-left: 1rem; }
.faq .accordion-body { padding: 0 0 1.5rem; color: var(--ink-60); font-size: 15px; line-height: 1.7; }

/* ---------- chamada final ---------- */
.final-cta { background: var(--cream-deep); }
.final-cta__title {
  font-family: 'Fraunces', Georgia, serif;
  font-size: clamp(1.7rem, 3.6vw, 2.6rem);
  line-height: 1.12; letter-spacing: -.02em;
  margin: 0; text-wrap: balance;
}
.final-cta__text { color: var(--ink-60); font-size: 16px; margin: 1.25rem 0 2rem; }

/* ---------- rodapé ---------- */
.footer { background: var(--ink); color: rgba(245, 241, 235, .6); padding: 3.5rem 0 3rem; }
.footer__brand { font-family: 'Fraunces', Georgia, serif; font-size: 1.35rem; color: var(--cream); }
.footer__text { margin: .85rem 0 1.25rem; font-size: 14px; }
.footer__text a { color: var(--brand); text-decoration: none; }
.footer__legal { font-size: 12px; line-height: 1.7; color: rgba(245, 241, 235, .35); margin: 0; }

/* ==========================================================================
   Checkout
   ========================================================================== */
.checkout { border: 0; border-radius: 24px; overflow: hidden; }

.checkout__head {
  background: var(--ink); color: var(--cream);
  padding: 1.4rem 1.75rem;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}
.checkout__product { font-family: 'Fraunces', Georgia, serif; font-size: 1.15rem; }
.checkout__total { font-size: 13px; color: rgba(245, 241, 235, .65); margin-top: .15rem; }
.checkout__total strong { color: var(--cream); }
.checkout__head .btn-close { filter: invert(1) grayscale(1); opacity: .6; }

.checkout__steps {
  display: flex; gap: .35rem;
  background: rgba(44, 24, 16, .04);
  border-bottom: 1px solid var(--hairline);
  padding: .75rem 1.75rem;
  overflow-x: auto;
}
.checkout__step {
  font-size: 12px; font-weight: 600; letter-spacing: .04em;
  color: var(--ink-45); white-space: nowrap;
  padding: .2rem .6rem; border-radius: 999px;
}
.checkout__step.is-active { color: #fff; background: var(--brand); }
.checkout__step.is-done { color: var(--brand); background: rgba(196, 112, 77, .12); }

.checkout__body { padding: 1.75rem; }
.checkout__legal { font-size: 12px; color: var(--ink-45); text-align: center; margin: 1rem 0 0; }

.checkout .form-label { font-size: 13px; font-weight: 600; margin-bottom: .35rem; }
.checkout .form-control,
.checkout .form-select {
  border-radius: 12px;
  border: 1px solid rgba(44, 24, 16, .16);
  padding: .75rem .9rem; font-size: 15px;
}
.checkout .form-control:focus,
.checkout .form-select:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(196, 112, 77, .16);
}
.checkout .form-control.is-invalid { border-color: #c0392b; background-image: none; }
.form-hint { font-size: 12px; color: var(--ink-45); margin-top: .3rem; }
.invalid-feedback { font-size: 12px; }

.input-with-icon { position: relative; }
.input-with-icon .form-control { padding-right: 2.8rem; }
.input-with-icon i {
  position: absolute; right: .95rem; top: 50%; transform: translateY(-50%);
  color: var(--ink-45); font-size: 18px;
}

.method-picker { display: grid; grid-template-columns: repeat(3, 1fr); gap: .6rem; }
.method {
  background: var(--surface);
  border: 1.5px solid rgba(44, 24, 16, .12);
  border-radius: 16px; padding: .9rem .6rem;
  text-align: center; transition: all .15s ease;
}
.method i { font-size: 20px; color: var(--ink-45); display: block; }
.method span { display: block; font-size: 14px; font-weight: 600; margin-top: .3rem; }
.method small { display: block; font-size: 11px; color: var(--ink-45); margin-top: .1rem; }
.method:hover { border-color: rgba(196, 112, 77, .5); }
.method.is-active { border-color: var(--brand); background: rgba(196, 112, 77, .06); }
.method.is-active i { color: var(--brand); }

.method-note {
  display: flex; gap: .75rem; align-items: flex-start;
  background: rgba(196, 112, 77, .07);
  border-radius: 14px; padding: 1rem 1.1rem;
  font-size: 13.5px; line-height: 1.5; color: var(--ink-60);
}
.method-note i { color: var(--brand); font-size: 16px; margin-top: .1rem; }

.result-badge {
  display: inline-flex; align-items: center; gap: .5rem;
  font-size: 12.5px; font-weight: 600; padding: .45rem 1rem; border-radius: 999px;
}
.result-badge--wait { background: rgba(196, 112, 77, .12); color: var(--brand); }

.pix-qr {
  width: min(230px, 65vw); height: auto;
  margin: 1.25rem auto .5rem; display: block;
  border-radius: 14px; border: 1px solid var(--hairline);
  padding: 8px; background: #fff;
}
.result-title { font-family: 'Fraunces', Georgia, serif; font-size: 1.5rem; margin: 1rem 0 .5rem; }
.result-text { color: var(--ink-60); font-size: 15px; line-height: 1.6; margin: 0; }
.result-hint { font-size: 12.5px; color: var(--ink-45); margin: 0; }

.copy-field { display: flex; gap: .5rem; }
.copy-field .form-control { font-size: 12.5px; font-family: ui-monospace, Menlo, monospace; }
.btn-copy {
  white-space: nowrap; border-radius: 12px; font-size: 13px; font-weight: 600;
  background: rgba(44, 24, 16, .06); color: var(--ink); border: 0; padding: 0 1rem;
}
.btn-copy:hover { background: rgba(44, 24, 16, .1); }

.success-mark {
  width: 66px; height: 66px; border-radius: 50%;
  background: rgba(46, 160, 100, .12); color: #2ea064;
  display: flex; align-items: center; justify-content: center;
  font-size: 34px; margin: 0 auto;
  animation: pop .35s cubic-bezier(.2, 1.4, .4, 1);
}
@keyframes pop { from { transform: scale(.6); opacity: 0; } to { transform: scale(1); opacity: 1; } }

/* ---------- responsivo ---------- */
@media (max-width: 991.98px) {
  .hero__text { text-align: center; }
  .hero__text .lead-muted { margin-inline: auto; }
  .hero__cta, .trust-list { justify-content: center; }
  .sticky-side { position: static; text-align: center; }
  .sticky-side .lead-muted { margin-inline: auto; }
}

@media (max-width: 575.98px) {
  .checkout__body { padding: 1.25rem; }
  .checkout__head, .checkout__steps { padding-left: 1.25rem; padding-right: 1.25rem; }
  .method-picker { grid-template-columns: 1fr; }
  .method { display: flex; align-items: center; gap: .75rem; text-align: left; }
  .method i { font-size: 18px; }
  .method span, .method small { margin-top: 0; }
  .chapter-list li { flex-direction: column; gap: .35rem; }
  .chapter-list__tag { min-width: 0; }
  .equation { flex-direction: column; gap: .75rem; }
  .equation__item { width: 100%; }
  .equation__arrow { transform: rotate(90deg); align-self: center; }
  .book-badge { right: 2%; bottom: 2%; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
  .book-cover { transform: none; }
}