/* ==========================================================================
   Do Pó ao Frasco — sistema visual
   Deriva de DESIGN.md. Contrastes medidos em art/contrast.py.
   ========================================================================== */

/* --- Fontes -------------------------------------------------------------- */
/* Subset latino: o português vive inteiro no bloco Latin-1 (U+0000–00FF). */
@font-face {
  font-family: 'Archivo';
  src: url('../fonts/archivo-latin-var.woff2') format('woff2-variations');
  font-weight: 400 900;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+2000-206F, U+20AC, U+2122, U+2212;
}
@font-face {
  font-family: 'Source Sans 3';
  src: url('../fonts/sourcesans3-latin-var.woff2') format('woff2-variations');
  font-weight: 300 700;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+2000-206F, U+20AC, U+2122, U+2212;
}

/* --- Tokens -------------------------------------------------------------- */
:root {
  --cream: #faf5ec;
  --peach: #fbeee3;
  --terracotta: #c15a28;
  --terracotta-ink: #a94d22;
  --terracotta-deep: #863f1c;
  --amber: #e08a3c;
  --graphite: #2c2723;
  --muted: #776d65;
  --border: #e9c6a9;
  --warm-gray: #8a7f76;

  --forte: #3e7c4f;
  --moderada: #926621;
  --emergente: #3d6ea5;

  --hairline: color-mix(in oklab, var(--graphite) 14%, transparent);

  --font-display: 'Archivo', 'Arial Black', system-ui, sans-serif;
  --font-body: 'Source Sans 3', system-ui, -apple-system, 'Segoe UI', sans-serif;

  /* Escala modular fluida, razão ≥1.25. Teto do h1 em 6rem. */
  --step--1: clamp(0.875rem, 0.84rem + 0.17vw, 0.95rem);
  --step-0:  clamp(1.0625rem, 1.02rem + 0.22vw, 1.1875rem);
  --step-1:  clamp(1.33rem, 1.25rem + 0.4vw, 1.6rem);
  --step-2:  clamp(1.66rem, 1.5rem + 0.8vw, 2.15rem);
  --step-3:  clamp(2.07rem, 1.8rem + 1.4vw, 2.9rem);
  --step-4:  clamp(2.6rem, 2.1rem + 2.5vw, 3.9rem);
  --step-5:  clamp(3.1rem, 2.2rem + 4.4vw, 6rem);

  --space-section: clamp(5rem, 10vw, 9rem);
  --gutter: clamp(1.25rem, 4vw, 2.5rem);
  --measure: 68ch;

  --radius: 6px;
  --radius-lg: 14px;

  --shadow-sm: 0 1px 2px rgb(44 39 35 / 0.06), 0 2px 6px rgb(44 39 35 / 0.05);
  --shadow-md: 0 2px 4px rgb(44 39 35 / 0.06), 0 10px 28px rgb(44 39 35 / 0.09);
  --shadow-lg: 0 4px 8px rgb(44 39 35 / 0.07), 0 24px 56px rgb(44 39 35 / 0.14);

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-quart: cubic-bezier(0.25, 1, 0.5, 1);

  --z-sticky: 100;
  --z-backdrop: 200;
  --z-modal: 300;
  --z-toast: 400;

  color-scheme: light;
}

/* --- Reset --------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

html { -webkit-text-size-adjust: 100%; }

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

body {
  background: var(--cream);
  color: var(--graphite);
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: 1.65;
  font-synthesis-weight: none;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
}

img, svg { display: block; max-width: 100%; height: auto; }

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.02;
  letter-spacing: -0.03em;
  text-wrap: balance;
}
h4 { font-family: var(--font-display); font-weight: 700; line-height: 1.2; }

p, li { text-wrap: pretty; }

a { color: var(--terracotta-ink); text-underline-offset: 0.18em; text-decoration-thickness: 1px; }
a:hover { color: var(--terracotta-deep); }

:where(a, button, summary, input):focus-visible {
  outline: 2.5px solid var(--terracotta-ink);
  outline-offset: 3px;
  border-radius: 3px;
}
.dark :where(a, button, summary):focus-visible { outline-color: var(--amber); }

::selection { background: var(--terracotta); color: var(--cream); }

/* --- Layout -------------------------------------------------------------- */
.wrap {
  width: min(1200px, 100% - var(--gutter) * 2);
  margin-inline: auto;
}
.prose { max-width: var(--measure); }

.section { padding-block: var(--space-section); position: relative; }
.section--peach { background: var(--peach); }
/* Fundo escuro casado com a cor de fundo da ilustração da mitocôndria (#24211E),
   para a imagem mesclar sem emenda. */
.section--dark { background: #24211e; color: var(--cream); }
.section--offer { background: var(--terracotta-deep); color: var(--cream); }

.dark, .section--dark, .section--offer { --hairline: rgb(250 245 236 / 0.18); }

/* Título de seção + o traço laranja curto. Este traço é o marcador recorrente
   da marca — substitui o eyebrow em caixa-alta acima de cada seção. */
.section-head { max-width: 32ch; margin-bottom: clamp(2.5rem, 5vw, 4rem); }
.section-head > h2 { font-size: var(--step-3); }
.section-head > h2 + p {
  margin-top: 1.25rem;
  max-width: 52ch;
  color: var(--muted);
  font-size: var(--step-1);
  line-height: 1.5;
  text-wrap: pretty;
}
.section--dark .section-head > h2 + p,
.section--offer .section-head > h2 + p { color: rgb(250 245 236 / 0.75); }

.rule {
  width: 3rem; height: 3px;
  background: var(--terracotta);
  border: 0;
  margin-bottom: 1.5rem;
}
.section--dark .rule, .section--offer .rule { background: var(--amber); }

.accent { color: var(--terracotta); }
.section--dark .accent, .section--offer .accent { color: var(--amber); }

/* --- Monograma: frasco dentro de hexágono -------------------------------- */
.monogram { width: 1.9em; height: 1.9em; flex: none; color: var(--terracotta); }
.section--dark .monogram, .section--offer .monogram, footer .monogram { color: var(--amber); }

/* --- Botões -------------------------------------------------------------- */
.btn {
  --btn-bg: var(--terracotta);
  --btn-fg: var(--cream);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6em;
  min-height: 48px;
  padding: 0.85em 1.6em;
  border: 1.5px solid transparent;
  border-radius: var(--radius);
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-family: var(--font-display);
  font-size: var(--step--1);
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: background-color 0.2s var(--ease-quart), box-shadow 0.25s var(--ease-quart),
              transform 0.25s var(--ease-quart), border-color 0.2s var(--ease-quart);
}
.btn:hover { color: var(--btn-fg); background: var(--terracotta-deep); box-shadow: var(--shadow-md); transform: translateY(-1px); }
.btn:active { transform: translateY(0); box-shadow: var(--shadow-sm); transition-duration: 0.05s; }

.btn--ghost {
  --btn-bg: transparent;
  --btn-fg: var(--graphite);
  border-color: var(--hairline);
  box-shadow: none;
}
.btn--ghost:hover { background: transparent; color: var(--terracotta-ink); border-color: var(--terracotta); box-shadow: none; }

.btn--invert { --btn-bg: var(--cream); --btn-fg: var(--terracotta-deep); }
.btn--invert:hover { background: #fff; color: var(--terracotta-deep); }

.btn[aria-disabled='true'] { opacity: 0.5; pointer-events: none; }

.btn-row { display: flex; flex-wrap: wrap; gap: 0.875rem; align-items: center; }

/* --- Navegação ----------------------------------------------------------- */
.nav {
  position: sticky; top: 0; z-index: var(--z-sticky);
  background: color-mix(in oklab, var(--cream) 88%, transparent);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease-quart), box-shadow 0.3s var(--ease-quart);
}
/* backdrop-filter só onde é suportado — e como refinamento, não como estrutura. */
@supports (backdrop-filter: blur(1px)) {
  .nav { backdrop-filter: saturate(1.4) blur(10px); }
}
.nav[data-stuck='true'] { border-bottom-color: var(--hairline); box-shadow: var(--shadow-sm); }

.nav__inner { display: flex; align-items: center; gap: 1.5rem; min-height: 68px; }

.nav__brand {
  display: flex; align-items: center; gap: 0.6rem;
  font-family: var(--font-display);
  font-weight: 800; font-size: 0.9rem;
  letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--graphite); text-decoration: none;
  margin-right: auto;
  padding-block: 0.55rem; /* alvo de toque ≥44px */
}
.nav__brand:hover { color: var(--graphite); }
.nav__brand em { font-style: normal; color: var(--terracotta); }

.nav__links { list-style: none; padding: 0; margin: 0; }
.nav__links a {
  color: var(--muted); text-decoration: none;
  font-weight: 600;
  transition: color 0.18s var(--ease-quart);
}
.nav__links a:hover { color: var(--terracotta-ink); }

/* Hambúrguer — só no mobile */
.nav__toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px;
  background: transparent; border: 1px solid var(--hairline);
  border-radius: var(--radius); color: var(--graphite); cursor: pointer;
}
.nav__toggle svg { width: 1.4rem; height: 1.4rem; }

@media (min-width: 62rem) {
  .nav__toggle { display: none; }
  .nav__links { display: flex; gap: 1.75rem; font-size: 0.9375rem; }
}

/* Mobile: painel dropdown */
@media (max-width: 61.99rem) {
  .nav__links {
    position: absolute; top: calc(100% - 1px); right: var(--gutter);
    display: flex; flex-direction: column;
    min-width: 12rem; padding: 0.5rem;
    background: color-mix(in oklab, var(--cream) 96%, transparent);
    border: 1px solid var(--border); border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    z-index: var(--z-sticky);
    opacity: 0; visibility: hidden; transform: translateY(-8px);
    transition: opacity 0.2s var(--ease-out), transform 0.2s var(--ease-out), visibility 0s 0.2s;
  }
  @supports (backdrop-filter: blur(1px)) { .nav__links { backdrop-filter: saturate(1.4) blur(10px); } }
  .nav[data-menu-open='true'] .nav__links {
    opacity: 1; visibility: visible; transform: none;
    transition: opacity 0.2s var(--ease-out), transform 0.2s var(--ease-out);
  }
  .nav__links a { display: block; padding: 0.7rem 0.8rem; border-radius: var(--radius); font-size: 1rem; min-height: 44px; display: flex; align-items: center; }
  .nav__links a:hover { background: var(--peach); color: var(--terracotta-ink); }
}
@media (max-width: 26rem) { .nav__inner > .btn { display: none; } }

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap; border: 0;
}

.skip {
  position: absolute; left: 50%; translate: -50% -150%;
  z-index: var(--z-toast);
  padding: 0.75em 1.25em;
  background: var(--graphite); color: var(--cream);
  border-radius: 0 0 var(--radius) var(--radius);
  text-decoration: none; font-weight: 600;
  transition: translate 0.2s var(--ease-out);
}
.skip:focus-visible { translate: -50% 0; color: var(--cream); }

/* --- Hero ---------------------------------------------------------------- */
.hero { padding-block: clamp(3rem, 7vw, 6rem) clamp(4rem, 8vw, 7rem); position: relative; }

.hero__grid {
  display: grid;
  gap: clamp(2rem, 5vw, 3.5rem);
  align-items: center;
}
@media (min-width: 60rem) {
  .hero__grid { grid-template-columns: 6fr 5fr; gap: clamp(2rem, 4vw, 4rem); }
}

/* O único kicker da página. Um sistema nomeado da marca, não gramática de seção. */
.kicker {
  display: inline-flex; align-items: center; gap: 0.7rem;
  font-family: var(--font-display);
  font-size: 0.78rem; font-weight: 700;
  letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--terracotta-ink);
  margin-bottom: 1.5rem;
}
.kicker::after { content: ''; width: 2rem; height: 1px; background: var(--border); }

.hero h1 {
  font-size: var(--step-5);
  font-weight: 900;
  letter-spacing: -0.035em;
}
.hero h1 .accent { display: block; }

.hero__deck {
  margin-top: 1.75rem;
  max-width: 46ch;
  font-size: var(--step-1);
  line-height: 1.5;
  color: color-mix(in oklab, var(--graphite) 88%, transparent);
}
.hero .btn-row { margin-top: 2.25rem; }

.hero__figure { position: relative; }
.hero__figure img { width: 100%; }
/* Camada viva sobre a arte estática. Multiply para as marcas âmbar tingirem
   o creme; some em reduced-motion (a arte estática já é linda). */
.hero-canvas {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  mix-blend-mode: multiply;
}
@media (prefers-reduced-motion: reduce) { .hero-canvas { display: none; } }
@media (max-width: 59.99rem) {
  .hero__figure { order: -1; max-width: 34rem; margin-inline: auto; }
}

/* Aviso de pesquisa no hero (enquadramento legal, discreto mas presente). */
.hero__disclaimer {
  margin-top: 1.5rem;
  max-width: 52ch;
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--muted);
}
.econ-note { display: block; margin-top: 0.6rem; font-size: 0.82rem; color: var(--muted); }

/* Prova em uma linha. Fatos sustentados pelo material — nada inventado. */
.hero__facts {
  margin-top: 2.75rem; padding-top: 1.75rem;
  border-top: 1px solid var(--hairline);
  display: flex; flex-wrap: wrap; gap: 0.6rem 1.75rem;
  list-style: none; padding-inline: 0;
  font-size: var(--step--1); color: var(--muted);
}
.hero__facts li { display: flex; align-items: center; gap: 0.5rem; }
.hero__facts svg { width: 1.05em; height: 1.05em; flex: none; color: var(--terracotta); }

/* --- Sequência numerada (do pó ao frasco) --------------------------------
   O único uso de numeração na página, porque isto É uma sequência real. */
.chain { display: grid; gap: clamp(2rem, 4vw, 3rem); counter-reset: step; }
@media (min-width: 48rem) { .chain { grid-template-columns: repeat(3, 1fr); gap: clamp(2rem, 4vw, 3.5rem); } }

.chain__item { counter-increment: step; padding-top: 2.5rem; border-top: 2px solid var(--terracotta); position: relative; }
.chain__item::before {
  content: '0' counter(step);
  position: absolute; top: 1rem; left: 0;
  font-family: var(--font-display);
  font-size: 0.8rem; font-weight: 800; letter-spacing: 0.1em;
  color: var(--terracotta-ink);
}
.chain__item h3 { font-size: var(--step-2); margin-bottom: 0.9rem; }
.chain__item p { color: var(--muted); font-size: 1.0625rem; line-height: 1.6; }

/* --- Moléculas ----------------------------------------------------------- */
.molecules { display: grid; gap: clamp(2.5rem, 5vw, 4.5rem); }
@media (min-width: 64rem) { .molecules { grid-template-columns: 1.15fr 0.85fr; align-items: start; } }

.mol-list { list-style: none; padding: 0; display: grid; }
.mol {
  padding-block: 1.6rem;
  border-bottom: 1px solid var(--hairline);
}
.mol:first-child { border-top: 1px solid var(--hairline); }

.mol__head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.6rem 1rem; margin-bottom: 0.5rem; }
.mol__name { font-family: var(--font-display); font-size: var(--step-1); font-weight: 800; letter-spacing: -0.02em; }
.mol__role { color: var(--muted); font-size: 1.0625rem; line-height: 1.55; max-width: 54ch; }

/* Selos de evidência — semântica, não decoração. */
.seal {
  display: inline-flex; align-items: center; gap: 0.45rem;
  font-family: var(--font-display);
  font-size: 0.7rem; font-weight: 700;
  letter-spacing: 0.09em; text-transform: uppercase;
}
.seal::before { content: ''; width: 0.5rem; height: 0.5rem; border-radius: 50%; background: currentColor; flex: none; }
.seal--forte { color: var(--forte); }
.seal--moderada { color: var(--moderada); }
.seal--emergente { color: var(--emergente); }

.mol-aside { position: sticky; top: 6rem; }
.mol-aside figcaption, .fig figcaption {
  margin-top: 1rem;
  font-size: 0.9375rem; line-height: 1.5;
  color: var(--muted);
  max-width: 42ch;
}
.section--dark figcaption { color: rgb(250 245 236 / 0.7); }

/* --- Figuras ------------------------------------------------------------- */
.fig { margin: 0; }
.fig--bleed { margin-top: clamp(2.5rem, 5vw, 4rem); }
.fig--bleed img { width: 100%; border-radius: var(--radius); }

/* Placa: suporte para uma figura de fundo creme repousar numa seção pêssego.
   É um suporte de ilustração impressa, não um card de conteúdo. */
.plate {
  background: var(--cream);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: clamp(1rem, 2.5vw, 2rem);
  box-shadow: var(--shadow-sm);
}
.plate img { border-radius: 2px; }

.duo { display: grid; gap: clamp(1.5rem, 3vw, 2.5rem); align-items: center; }
@media (min-width: 56rem) { .duo { grid-template-columns: 1fr 1.05fr; } }

/* --- Lista com check ----------------------------------------------------- */
.checks { list-style: none; padding: 0; display: grid; gap: 1rem; }
.checks li { display: grid; grid-template-columns: auto 1fr; gap: 0.9rem; align-items: start; }
.checks svg { width: 1.4rem; height: 1.4rem; margin-top: 0.15rem; flex: none; color: var(--terracotta); }
.section--dark .checks svg, .section--offer .checks svg { color: var(--amber); }

/* --- Segurança ----------------------------------------------------------- */
.safety { display: grid; gap: clamp(2.5rem, 5vw, 4rem); align-items: center; }
@media (min-width: 58rem) { .safety { grid-template-columns: 1fr auto; } }

/* O selo tem fundo creme; recortado em disco, vira um carimbo sobre o grafite. */
.stamp {
  width: clamp(13rem, 26vw, 19rem);
  aspect-ratio: 1;
  border-radius: 50%;
  overflow: hidden;
  box-shadow: 0 0 0 1px rgb(250 245 236 / 0.14), var(--shadow-lg);
  justify-self: center;
}
.stamp img { width: 100%; height: 100%; object-fit: cover; }

/* Ressalva. Azul "emergente" — nunca vermelho de alarme. */
.note {
  margin-top: 2.5rem;
  padding: 1.5rem 1.6rem;
  border: 1px solid rgb(120 165 214 / 0.45);
  border-radius: var(--radius);
  background: rgb(61 110 165 / 0.12);
  display: grid; grid-template-columns: auto 1fr; gap: 1rem;
  align-items: start;
}
.note svg { width: 1.5rem; height: 1.5rem; color: #9dc2e8; flex: none; margin-top: 0.1rem; }
.note h4 { font-size: 0.95rem; letter-spacing: 0.04em; text-transform: uppercase; color: #b6d3ee; margin-bottom: 0.5rem; }
.note p { font-size: 1rem; line-height: 1.6; color: rgb(250 245 236 / 0.86); }

/* --- Bônus / ebook ------------------------------------------------------- */
.bonus { display: grid; gap: clamp(2.5rem, 5vw, 4rem); align-items: center; }
@media (min-width: 58rem) { .bonus { grid-template-columns: 0.85fr 1.15fr; } }

.ebook-cover {
  max-width: 22rem;
  border-radius: 3px;
  box-shadow: var(--shadow-lg);
  rotate: -1.6deg;
  transition: rotate 0.5s var(--ease-out), box-shadow 0.5s var(--ease-out);
}
.ebook-cover:hover { rotate: 0deg; }

.pages {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: clamp(0.75rem, 2vw, 1.25rem);
  margin-top: 2.5rem;
  list-style: none; padding: 0;
}
.pages img {
  width: 100%;
  border-radius: 2px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: transform 0.4s var(--ease-out), box-shadow 0.4s var(--ease-out);
}
.pages img:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }

/* --- Para quem é / não é ------------------------------------------------- */
.fit { display: grid; gap: clamp(2rem, 5vw, 4rem); }
@media (min-width: 52rem) { .fit { grid-template-columns: 1fr 1fr; } }
.fit h3 { font-size: var(--step-2); margin-bottom: 1.5rem; }
.fit__no svg { color: var(--warm-gray); }

/* --- Oferta -------------------------------------------------------------- */
.offer { display: grid; gap: clamp(2.5rem, 5vw, 4rem); align-items: center; }
@media (min-width: 58rem) { .offer { grid-template-columns: 1.1fr 0.9fr; } }
.offer h2 { font-size: var(--step-4); }

.price-card {
  background: var(--cream);
  color: var(--graphite);
  border-radius: var(--radius-lg);
  padding: clamp(1.75rem, 4vw, 2.75rem);
  box-shadow: var(--shadow-lg);
}
.price-card__label {
  font-family: var(--font-display);
  font-size: 0.75rem; font-weight: 700;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--terracotta-ink);
}
.price {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 6vw, 3.6rem);
  font-weight: 900; letter-spacing: -0.035em;
  line-height: 1; margin-block: 0.75rem 0.35rem;
  font-variant-numeric: tabular-nums;
}
.price small { font-size: 0.42em; font-weight: 700; letter-spacing: -0.01em; }
.price-card__meta { color: var(--muted); font-size: 0.9375rem; }
.price-card .btn { width: 100%; margin-top: 1.75rem; }
.price-card__fine { margin-top: 1rem; font-size: 0.8125rem; color: var(--muted); text-align: center; }
.price-card__guarantee {
  margin-top: 0.9rem; padding-top: 0.9rem;
  border-top: 1px solid var(--hairline);
  display: flex; align-items: center; justify-content: center; gap: 0.45rem;
  font-size: 0.8125rem; line-height: 1.4; color: var(--muted); text-align: center;
}
.price-card__guarantee svg { width: 1.05rem; height: 1.05rem; flex: none; color: var(--forte); }

/* --- FAQ ----------------------------------------------------------------- */
.faq { max-width: 52rem; margin-inline: auto; }
.faq details {
  border-bottom: 1px solid var(--hairline);
}
.faq summary {
  display: flex; align-items: center; justify-content: space-between; gap: 1.5rem;
  padding-block: 1.5rem;
  min-height: 44px;
  font-family: var(--font-display);
  font-size: var(--step-1); font-weight: 700; letter-spacing: -0.015em;
  cursor: pointer; list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ''; flex: none;
  width: 0.8rem; height: 0.8rem;
  border-right: 2.5px solid var(--terracotta);
  border-bottom: 2.5px solid var(--terracotta);
  rotate: 45deg;
  translate: 0 -0.2rem;
  transition: rotate 0.3s var(--ease-out), translate 0.3s var(--ease-out);
}
.faq details[open] summary::after { rotate: -135deg; translate: 0 0.15rem; }
.faq summary:hover { color: var(--terracotta-ink); }
.faq__body { padding-bottom: 1.75rem; max-width: 62ch; color: var(--muted); }
.faq__body p + p { margin-top: 0.9rem; }

/* --- Rodapé -------------------------------------------------------------- */
footer { background: var(--graphite); color: rgb(250 245 236 / 0.72); padding-block: clamp(3.5rem, 6vw, 5rem) 2.5rem; font-size: 0.9375rem; }
.footer__top { display: flex; flex-wrap: wrap; gap: 2rem; justify-content: space-between; align-items: start; padding-bottom: 2.5rem; border-bottom: 1px solid var(--hairline); }
.footer__brand { display: flex; align-items: center; gap: 0.7rem; font-family: var(--font-display); font-weight: 800; font-size: 1rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--cream); }
.footer__brand em { font-style: normal; color: var(--amber); }
.footer__disclaimer { max-width: 58ch; line-height: 1.6; }
.footer__disclaimer strong { color: rgb(250 245 236 / 0.92); font-weight: 600; }
.footer__bottom { padding-top: 2rem; display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between; font-size: 0.875rem; color: rgb(250 245 236 / 0.55); }
footer a { color: rgb(250 245 236 / 0.82); }
footer a:hover { color: var(--amber); }

/* --- Economia: curso + base ----------------------------------------------- */
.econ { max-width: 60rem; margin-inline: auto; text-align: center; }
.econ .rule { margin-inline: auto; }
.econ-hook {
  color: var(--muted); font-size: var(--step-1); line-height: 1.4;
  max-width: 42ch; margin: 0 auto 1.5rem;
}
.econ-title { font-size: var(--step-4); }
.econ-body {
  max-width: 58ch; margin: 1.75rem auto 0;
  color: var(--graphite); font-size: 1.0625rem; line-height: 1.65;
}
.econ-body strong { color: var(--terracotta-ink); }
.econ-lead {
  margin-top: 1.5rem;
  font-family: var(--font-display); font-weight: 700; font-size: var(--step-1);
  color: var(--graphite);
}
.roi {
  list-style: none; padding: 0;
  margin: clamp(2rem, 4vw, 3rem) 0 0;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: clamp(1rem, 2.5vw, 1.5rem);
}
.roi__tile {
  display: flex; flex-direction: column; align-items: center;
  padding: clamp(1.5rem, 3.5vw, 2.25rem) 1rem;
  background: #fffaf2;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}
.roi__num {
  font-family: var(--font-display); font-weight: 900;
  font-size: clamp(2.8rem, 8vw, 4.25rem); line-height: 0.95;
  color: var(--terracotta); letter-spacing: -0.045em;
  font-variant-numeric: tabular-nums;
}
.roi__unit {
  margin-top: 0.35rem;
  font-family: var(--font-display); font-weight: 700;
  font-size: 0.82rem; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--terracotta-ink);
}
.roi__label { margin-top: 0.6rem; color: var(--muted); font-size: 0.95rem; }
.econ-foot {
  margin: clamp(2rem, 4vw, 2.75rem) auto 0; max-width: 52ch;
  color: var(--muted); font-size: 1.0625rem; line-height: 1.6;
}

/* --- A conta do 5-Amino --------------------------------------------------- */
.calc {
  list-style: none; padding: 0;
  margin: 0 auto clamp(2.5rem, 5vw, 3.5rem);
  display: grid; grid-template-columns: repeat(2, 1fr);  /* 2×2 no tablet */
  gap: clamp(0.75rem, 2vw, 1.15rem);
}
@media (min-width: 64rem) { .calc { grid-template-columns: repeat(4, 1fr); } }  /* derivação em linha */
@media (max-width: 26rem) { .calc { grid-template-columns: 1fr; } }
.calc li {
  padding: clamp(1.15rem, 2.5vw, 1.5rem);
  background: var(--cream);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  display: flex; flex-direction: column; gap: 0.4rem;
}
.calc__v {
  font-family: var(--font-display); font-weight: 800;
  font-size: var(--step-2); line-height: 1;
  color: var(--graphite); letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}
.calc__v small { font-size: 0.5em; font-weight: 700; color: var(--muted); }
.calc__d { color: var(--muted); font-size: 0.9375rem; line-height: 1.4; }

.versus {
  display: grid; grid-template-columns: 1fr auto 1fr;
  gap: clamp(1rem, 3vw, 2rem); align-items: stretch;
  max-width: 56rem; margin-inline: auto;
}
.versus__side {
  text-align: center;
  padding: clamp(1.5rem, 3.5vw, 2.25rem);
  border-radius: var(--radius-lg);
  background: var(--cream); border: 1px solid var(--border);
  display: flex; flex-direction: column; justify-content: center;
}
.versus__side--win {
  background: var(--terracotta-deep); border-color: var(--terracotta-deep);
  color: var(--cream); box-shadow: var(--shadow-lg);
}
.versus__label {
  font-family: var(--font-display); font-weight: 700;
  font-size: 0.78rem; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 0.7rem;
}
.versus__side--win .versus__label { color: rgb(250 245 236 / 0.82); }
.versus__big {
  font-family: var(--font-display); font-weight: 900;
  font-size: clamp(2rem, 6vw, 3rem); line-height: 1;
  letter-spacing: -0.035em; color: var(--graphite);
  font-variant-numeric: tabular-nums;
}
.versus__side--win .versus__big { color: var(--cream); }
.versus__big small { font-size: 0.4em; font-weight: 700; letter-spacing: 0; }
.versus__note { margin-top: 0.85rem; font-size: 0.85rem; line-height: 1.45; color: rgb(250 245 236 / 0.85); }
.versus__x {
  align-self: center;
  font-family: var(--font-display); font-weight: 800; font-size: 1rem;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted);
}
@media (max-width: 40rem) {
  .versus { grid-template-columns: 1fr; }
  .versus__x { padding: 0.35rem 0; }
}

/* --- CTA fixo no mobile --------------------------------------------------- */
.mobile-cta {
  position: fixed; left: 0; right: 0; bottom: 0;
  z-index: var(--z-sticky);
  display: flex; align-items: center; gap: 1rem; justify-content: space-between;
  padding: 0.7rem clamp(1rem, 4vw, 1.25rem);
  padding-bottom: calc(0.7rem + env(safe-area-inset-bottom, 0px));
  background: color-mix(in oklab, var(--cream) 92%, transparent);
  border-top: 1px solid var(--border);
  box-shadow: 0 -4px 20px rgb(44 39 35 / 0.1);
  transform: translateY(120%);
  transition: transform 0.4s var(--ease-out);
}
@supports (backdrop-filter: blur(1px)) {
  .mobile-cta { backdrop-filter: saturate(1.4) blur(10px); }
}
.mobile-cta[data-shown] { transform: none; }
.mobile-cta__info { display: flex; flex-direction: column; line-height: 1.2; }
.mobile-cta__price { font-family: var(--font-display); font-weight: 800; font-size: 1.05rem; color: var(--graphite); }
.mobile-cta__meta { font-size: 0.75rem; color: var(--muted); }
.mobile-cta .btn { flex: none; padding-inline: 1.15rem; }
@media (min-width: 48rem) { .mobile-cta { display: none; } }
@media (prefers-reduced-motion: reduce) { .mobile-cta { transition: none; } }

/* --- Hexágonos decorativos ----------------------------------------------- */
.hexes {
  position: absolute; inset-block: 0; right: 0;
  width: min(38rem, 55%);
  pointer-events: none;
  opacity: 0.35;
  color: var(--border);
  mask-image: linear-gradient(to left, #000, transparent 78%);
}
.section--dark .hexes { color: rgb(250 245 236 / 0.18); opacity: 0.5; }

/* --- Na prática: o que você vai aprender a fazer -------------------------- */
.make { display: grid; gap: clamp(1.25rem, 2.5vw, 1.75rem); grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.make__item {
  padding: clamp(1.5rem, 3vw, 2rem);
  background: #fffaf2;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
  isolation: isolate;
}
/* Arte de fundo: line-art âmbar ancorada na base, atrás do conteúdo. */
.make__art {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  z-index: 0;
  width: 100%; height: auto;
  opacity: 0.42;
  pointer-events: none;
  -webkit-user-select: none; user-select: none;
  -webkit-mask-image: linear-gradient(to bottom, transparent 0%, #000 38%);
  mask-image: linear-gradient(to bottom, transparent 0%, #000 38%);
}
.make__item > :not(.make__art) { position: relative; z-index: 1; }
.make__item svg.ic { width: 2rem; height: 2rem; color: var(--terracotta); margin-bottom: 1rem; }
.make__item h3 { font-size: var(--step-1); margin-bottom: 0.6rem; letter-spacing: -0.02em; }
.make__item p { color: var(--muted); font-size: 1.0625rem; line-height: 1.55; }
.make__tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 1rem; }
.tag {
  font-family: var(--font-display);
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.04em;
  padding: 0.3em 0.7em; border-radius: 100px;
  background: var(--peach); color: var(--terracotta-ink);
  border: 1px solid var(--border);
}

/* --- Formato: vídeo aulas práticas + teoria escrita --------------------- */
.section-head--center { max-width: 46ch; margin-inline: auto; text-align: center; }
.section-head--center .rule { margin-inline: auto; }
.section-head--center > h2 + p { margin-inline: auto; }

.format {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  grid-template-columns: 1fr;
  align-items: center;
}
@media (min-width: 900px) {
  .format { grid-template-columns: 1.35fr 1fr; }
}

/* O "player" de aula: moldura escura casada com a estética do mecanismo. */
.lesson { margin: 0; }
.lesson__frame {
  position: relative;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #24211e;
  box-shadow: var(--shadow-lg);
  isolation: isolate;
}
.lesson__vid {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover; display: block; z-index: 0;
}
.lesson__bar {
  position: absolute; inset: auto 0 0 0; z-index: 2;
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; padding: 2.6rem 1.1rem 0.9rem;
  font-family: var(--font-display); font-weight: 700;
  font-size: 0.85rem; letter-spacing: 0.01em; color: var(--cream);
  background: linear-gradient(transparent, rgb(20 17 15 / 0.82));
}
.lesson__time { font-variant-numeric: tabular-nums; opacity: 0.82; }
.lesson__track {
  position: absolute; left: 1.1rem; right: 1.1rem; bottom: 0.62rem; z-index: 3;
  height: 3px; border-radius: 100px; background: rgb(250 245 236 / 0.28);
}
.lesson__track > span { display: block; width: 42%; height: 100%; border-radius: 100px; background: var(--amber); }
.lesson__chapters { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 0.9rem; }
.lesson__chapters span {
  font-family: var(--font-display); font-size: 0.72rem; font-weight: 700; letter-spacing: 0.04em;
  padding: 0.3em 0.7em; border-radius: 100px;
  background: #fffaf2; color: var(--terracotta-ink); border: 1px solid var(--border);
}

/* Os dois pilares — lista dividida por fio, não cards. */
.format__pillars { display: grid; }
.pillar { padding-block: clamp(1.3rem, 3vw, 1.7rem); border-bottom: 1px solid var(--hairline); }
.pillar:first-child { border-top: 1px solid var(--hairline); }
.pillar svg.ic { width: 2rem; height: 2rem; color: var(--terracotta); margin-bottom: 0.7rem; }
.pillar h3 { font-size: var(--step-1); margin-bottom: 0.45rem; letter-spacing: -0.02em; }
.pillar p { color: var(--muted); font-size: 1.0625rem; line-height: 1.55; }

/* --- Curso vivo: lista tipográfica (distinta dos cards) ------------------ */
.grow { list-style: none; padding: 0; margin: 0; max-width: 52rem; display: grid; }
.grow__item {
  display: grid; grid-template-columns: auto 1fr; gap: clamp(1rem, 3vw, 1.5rem);
  padding-block: clamp(1.4rem, 3vw, 1.8rem);
  border-bottom: 1px solid var(--hairline);
  align-items: start;
}
.grow__item:first-child { border-top: 1px solid var(--hairline); }
.grow__ic { width: 2rem; height: 2rem; flex: none; color: var(--terracotta); margin-top: 0.15rem; }
.grow__item h3 { font-size: var(--step-1); margin-bottom: 0.4rem; letter-spacing: -0.015em; }
.grow__item p { color: var(--muted); font-size: 1.0625rem; line-height: 1.55; max-width: 60ch; }

/* --- Insumos: onde comprar ----------------------------------------------- */
.supply { display: grid; gap: clamp(2rem, 4vw, 3.5rem); align-items: center; }
@media (min-width: 56rem) { .supply { grid-template-columns: 1.1fr 0.9fr; } }

/* --- Conteúdo extra: canetinha ------------------------------------------- */
.extra-card {
  display: grid; gap: 1.5rem;
  padding: clamp(1.5rem, 4vw, 2.75rem);
  background: var(--peach);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  align-items: center;
}
@media (min-width: 50rem) { .extra-card { grid-template-columns: auto 1fr; gap: 2.5rem; } }
.extra-card__badge {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: var(--font-display); font-size: 0.72rem; font-weight: 700;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--terracotta-ink);
  margin-bottom: 0.9rem;
}
.extra-card__badge svg { width: 1.1em; height: 1.1em; }
.extra-card h3 { font-size: var(--step-2); margin-bottom: 0.75rem; }
.extra-card p { color: var(--graphite); font-size: 1.0625rem; line-height: 1.6; max-width: 52ch; }
.extra-card__icon {
  width: clamp(5rem, 12vw, 7rem); aspect-ratio: 1;
  display: grid; place-items: center;
  background: var(--cream); border: 1px solid var(--border); border-radius: 50%;
  color: var(--terracotta); justify-self: center;
}
.extra-card__icon svg { width: 52%; height: 52%; }

/* --- Mecanismo: vídeo 3D de fundo ----------------------------------------
   O vídeo do Sora tem fundo near-black; mix-blend-mode: screen faz esse escuro
   fundir na seção (#24211E) e só o brilho da mitocôndria aparecer. */
.mech-fig { max-width: 1000px; margin-inline: auto; }
.mech-video { line-height: 0; }
.mech-vid {
  width: 100%; height: auto; display: block;
  /* Afunda o bokeh quente do fundo (contraste) para o escuro ficar mais escuro,
     depois lighten faz a seção (mais clara) vencer onde o vídeo é escuro =
     mescla; e a máscara radial enfeixa as bordas na seção, sem retângulo. */
  filter: contrast(1.08);
  mix-blend-mode: lighten;
  -webkit-mask-image: radial-gradient(ellipse 98% 90% at 50% 50%, #000 66%, transparent 100%);
  mask-image: radial-gradient(ellipse 98% 90% at 50% 50%, #000 66%, transparent 100%);
}

/* --- Nota do curso vivo -------------------------------------------------- */
.live-note {
  margin-top: clamp(2rem, 4vw, 3rem);
  display: grid; grid-template-columns: auto 1fr; gap: 1rem;
  align-items: center;
  padding: 1.4rem 1.6rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: color-mix(in oklab, var(--terracotta) 8%, var(--peach));
}
.live-note svg { width: 1.6rem; height: 1.6rem; color: var(--terracotta); flex: none; }
.live-note p { font-size: 1.0625rem; line-height: 1.55; color: var(--graphite); }

/* ==========================================================================
   Seção secreta — "O blend que muda o jogo"
   Tema dark próprio (mais escuro que o grafite normal), estilo cofre/teaser.
   Os nomes das moléculas ficam RASURADOS (blur), nunca legíveis.
   ========================================================================== */
.section--secret {
  --hairline: rgb(224 138 60 / 0.22);
  background:
    radial-gradient(120% 90% at 80% 0%, rgb(193 90 40 / 0.16), transparent 55%),
    radial-gradient(90% 80% at 10% 100%, rgb(224 138 60 / 0.1), transparent 50%),
    #171310;
  color: #f3ece1;
  overflow: clip;
  position: relative;
}
.section--secret .rule { background: var(--amber); }
.section--secret .accent { color: var(--amber); }

.vault { display: grid; gap: clamp(2.5rem, 5vw, 4rem); align-items: center; }
@media (min-width: 60rem) { .vault { grid-template-columns: 1fr 1fr; } }

.vault__lockbadge {
  display: inline-flex; align-items: center; gap: 0.6rem;
  font-family: var(--font-display); font-size: 0.75rem; font-weight: 700;
  letter-spacing: 0.16em; text-transform: uppercase; color: var(--amber);
  padding: 0.5em 1em;
  border: 1px solid rgb(224 138 60 / 0.4);
  border-radius: 100px;
  background: rgb(224 138 60 / 0.08);
  margin-bottom: 1.75rem;
}
.vault__lockbadge svg { width: 1.15em; height: 1.15em; }

.vault h2 { font-size: var(--step-4); }
.vault h2 .accent { display: block; }
.vault__deck { margin-top: 1.5rem; max-width: 46ch; color: rgb(243 236 225 / 0.78); font-size: var(--step-1); line-height: 1.5; }
.vault .btn { margin-top: 2.25rem; }

/* O cartão-cofre com os nomes rasurados */
.locked {
  position: relative;
  padding: clamp(1.75rem, 4vw, 2.75rem);
  border: 1px solid rgb(224 138 60 / 0.28);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(180deg, rgb(255 255 255 / 0.04), transparent),
    rgb(23 19 16 / 0.6);
  box-shadow: inset 0 1px 0 rgb(255 255 255 / 0.05), var(--shadow-lg);
}
.locked__title {
  font-family: var(--font-display); font-size: 0.78rem; font-weight: 700;
  letter-spacing: 0.14em; text-transform: uppercase; color: rgb(243 236 225 / 0.6);
  margin-bottom: 1.25rem;
}
.locked__rows { display: grid; gap: 0.9rem; }
.locked__row { display: grid; grid-template-columns: 1.6rem 1fr auto; gap: 0.9rem; align-items: center; }
.locked__row svg { width: 1.4rem; height: 1.4rem; color: var(--amber); opacity: 0.85; }

/* A rasura: o texto existe no DOM (acessível), mas fica ilegível por blur.
   Como reforço, aria-hidden nas iscas e um rótulo real no screen reader. */
.redacted {
  font-family: var(--font-display); font-weight: 800; font-size: 1.15rem;
  letter-spacing: 0.02em;
  color: #f3ece1;
  filter: blur(7px);
  user-select: none;
  -webkit-user-select: none;
}
.locked__lock {
  justify-self: end;
  font-family: var(--font-display); font-size: 0.68rem; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--amber);
  display: inline-flex; align-items: center; gap: 0.35rem;
}
.locked__lock svg { width: 0.95em; height: 0.95em; }

/* A única linha revelada: o 5-Amino-1MQ */
.locked__row--open {
  background: rgb(224 138 60 / 0.1);
  border: 1px solid rgb(224 138 60 / 0.3);
  border-radius: 8px;
  padding: 0.55rem 0.7rem;
  margin: -0.15rem -0.7rem;
}
.locked__name { font-family: var(--font-display); font-weight: 800; font-size: 1.15rem; color: #f3ece1; }
.locked__open {
  justify-self: end;
  font-family: var(--font-display); font-size: 0.68rem; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--amber);
}

/* Exemplo de página do ebook (curado: só o capítulo do 5-Amino, sem vazar) */
.ebook-example { margin-top: 2.25rem; display: grid; gap: 1rem; max-width: 24rem; }
.ebook-example img {
  width: 100%; border-radius: 4px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
}
.ebook-example figcaption { font-size: 0.9375rem; line-height: 1.5; color: var(--muted); }
.ebook-example figcaption strong { color: var(--terracotta-ink); font-weight: 600; }

/* Páginas bloqueadas: desfoque queimado no arquivo + cadeado, criando o
   segredo sem revelar nome nenhum. */
.locked-pages { margin-top: clamp(3rem, 6vw, 4.5rem); }
.locked-pages__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: clamp(0.75rem, 2vw, 1.25rem);
  list-style: none; padding: 0; margin: 0;
}
.lpage {
  position: relative; margin: 0;
  aspect-ratio: 300 / 450;
  border-radius: 4px; overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.lpage img { width: 100%; height: 100%; object-fit: cover; display: block; }
.lpage::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgb(193 90 40 / 0.04), rgb(44 39 35 / 0.22));
}
.lpage__lock {
  position: absolute; inset: 0; z-index: 1;
  display: grid; place-items: center;
  color: var(--terracotta);
}
.lpage__lock svg { width: 1.9rem; height: 1.9rem; filter: drop-shadow(0 1px 3px rgb(250 245 236 / 0.9)); }
.locked-pages__cap {
  margin-top: 1.5rem;
  display: flex; align-items: center; justify-content: center; gap: 0.6rem;
  text-align: center; color: var(--muted); font-size: 0.95rem;
}
.locked-pages__cap svg { width: 1.05rem; height: 1.05rem; color: var(--terracotta); flex: none; }

.locked__foot {
  margin-top: 1.5rem; padding-top: 1.25rem;
  border-top: 1px dashed rgb(224 138 60 / 0.3);
  font-size: 0.9rem; color: rgb(243 236 225 / 0.6);
  display: flex; align-items: center; gap: 0.6rem;
}
.locked__foot svg { width: 1.05rem; height: 1.05rem; color: var(--amber); flex: none; }

/* Cadeado grande decorativo, atrás do cartão em telas largas */
.vault__glow {
  position: absolute; inset: 0; pointer-events: none;
  color: rgb(224 138 60 / 0.05);
}

/* ==========================================================================
   Movimento
   O estado visível é o PADRÃO. O estado oculto só existe quando o JS confirma
   suporte a IntersectionObserver (html.js-reveal). Sem JS, aba oculta ou
   renderizador headless: o conteúdo aparece. Nunca condicionamos conteúdo
   a uma transição.
   ========================================================================== */
@media (prefers-reduced-motion: no-preference) {
  .js-reveal [data-reveal] {
    opacity: 0;
    transform: translateY(18px);
  }
  .js-reveal [data-reveal].is-in {
    opacity: 1;
    transform: none;
    transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
    transition-delay: var(--reveal-delay, 0ms);
  }

  /* Coreografia de entrada do hero: kicker → título → deck → CTA → figura. */
  .hero__stagger > * {
    opacity: 0;
    animation: rise 0.85s var(--ease-out) forwards;
    animation-delay: calc(var(--i, 0) * 90ms + 60ms);
  }
  @keyframes rise {
    from { opacity: 0; transform: translateY(20px); }
    to   { opacity: 1; transform: none; }
  }
}

/* Parallax de scroll ------------------------------------------------------
   Elementos com [data-parallax] recebem um translateY proporcional à posição
   no viewport, calculado em JS e escrito em --p (px). Só transform, nunca
   layout. O padrão é translate 0 — sem JS, sem suporte, ou reduced-motion,
   o elemento fica exatamente onde o layout o colocou. */
@media (prefers-reduced-motion: no-preference) {
  .js-parallax [data-parallax] {
    transform: translate3d(0, var(--p, 0px), 0);
    will-change: transform;
  }
  /* O campo de hexágonos também deriva de leve, em sentido oposto. */
  .js-parallax .hexes { transform: translate3d(0, var(--p, 0px), 0); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .ebook-cover { rotate: 0deg; }
  [data-parallax], .hexes { transform: none !important; }
}

@media print {
  .nav, .hexes, .btn { display: none; }
  body { background: #fff; }
}