/* =============================================================================
   Shopping donde EMSA — Landing page
   Hoja de estilos única. Orden: tokens → base → utilidades → componentes →
   secciones → responsive.
   ============================================================================= */

/* ── 1. Tokens ─────────────────────────────────────────────────────────────── */
:root {
  /* Paleta derivada del logotipo de la marca */
  --cream:        #f6f1e9;
  --cream-soft:   #fbf8f3;
  --white:        #ffffff;
  --ink:          #1d1d1f;
  --ink-soft:     #6e6e73;
  --ink-faint:    #a5a19b;
  --line:         rgba(29, 29, 31, .12);
  --sage:         #7d9a92;
  --sage-deep:    #5c7c73;
  --espresso:     #4c2e21;
  --black:        #0a0a0b;
  --black-soft:   #16161a;
  --wa:           #25d366;
  --wa-deep:      #128c7e;

  /* Tipografía */
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
          "Segoe UI", Inter, Roboto, "Helvetica Neue", Arial, sans-serif;

  /* Métrica */
  --nav-h: 56px;
  --radius-sm: 12px;
  --radius:    20px;
  --radius-lg: 32px;
  --gutter:    24px;
  --maxw:      1160px;

  /* Sombras suaves, nunca duras */
  --shadow-sm: 0 1px 2px rgba(0,0,0,.04), 0 4px 14px rgba(0,0,0,.05);
  --shadow:    0 2px 6px rgba(0,0,0,.05), 0 18px 48px rgba(0,0,0,.09);
  --shadow-lg: 0 4px 12px rgba(0,0,0,.06), 0 32px 80px rgba(0,0,0,.14);

  /* Curvas de animación estilo Apple */
  --ease: cubic-bezier(.4, 0, .2, 1);
  --ease-out: cubic-bezier(.16, 1, .3, 1);
}

/* ── 2. Reset y base ───────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 16px);
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--cream-soft);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

h1, h2, h3 { margin: 0; font-weight: 700; letter-spacing: -.035em; line-height: 1.06; }
p  { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }

a {
  color: inherit;
  text-decoration: none;
  transition: color .25s var(--ease), opacity .25s var(--ease);
}

button { font: inherit; color: inherit; border: 0; background: none; cursor: pointer; }

:focus-visible {
  outline: 2px solid var(--sage-deep);
  outline-offset: 3px;
  border-radius: 6px;
}

::selection { background: var(--sage); color: #fff; }

/* ── 3. Utilidades ─────────────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.container--narrow { max-width: 820px; }

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

.skip-link {
  position: fixed; top: 8px; left: 8px; z-index: 200;
  padding: 10px 18px; border-radius: 999px;
  background: var(--ink); color: #fff; font-size: 14px; font-weight: 600;
  transform: translateY(-160%);
  transition: transform .25s var(--ease);
}
.skip-link:focus { transform: translateY(0); }

.eyebrow {
  font-size: .8125rem;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--sage-deep);
}

.lead {
  font-size: clamp(1.0625rem, .9rem + .7vw, 1.375rem);
  line-height: 1.45;
  color: var(--ink-soft);
  letter-spacing: -.01em;
}

/* Aparición al hacer scroll */
[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .8s var(--ease-out), transform .8s var(--ease-out);
  transition-delay: calc(var(--d, 0) * 90ms);
}
[data-reveal].is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
}

/* ── 4. Botones ────────────────────────────────────────────────────────────── */
.btn {
  --btn-bg: var(--ink);
  --btn-fg: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .55em;
  padding: 14px 28px;
  border-radius: 999px;
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -.01em;
  white-space: nowrap;
  transition: transform .3s var(--ease-out), box-shadow .3s var(--ease),
              background-color .3s var(--ease), opacity .3s var(--ease);
}
.btn:hover  { transform: translateY(-2px); box-shadow: var(--shadow); }
.btn:active { transform: translateY(0) scale(.985); }

.btn--dark  { --btn-bg: var(--ink);  --btn-fg: #fff; }
.btn--light { --btn-bg: #fff;        --btn-fg: var(--ink); }
.btn--wa    { --btn-bg: var(--wa-deep); --btn-fg: #fff; }
.btn--wa:hover { --btn-bg: #0f7c6f; }

.btn--ghost {
  --btn-bg: transparent;
  --btn-fg: var(--ink);
  box-shadow: inset 0 0 0 1.5px var(--line);
}
.btn--ghost:hover { box-shadow: inset 0 0 0 1.5px rgba(29,29,31,.3); }

.btn--sm  { padding: 9px 20px;  font-size: .9375rem; }
.btn--lg  { padding: 17px 38px; font-size: 1.0625rem; }
.btn--wide { width: 100%; }

.icon-wa    { width: 1.25em; height: 1.25em; flex: none; }
.icon-arrow { width: 1em;    height: 1em;    flex: none; transition: transform .3s var(--ease-out); }
.btn:hover .icon-arrow { transform: translateX(3px); }

/* ── 5. Marca ──────────────────────────────────────────────────────────────── */
.brand { display: inline-flex; align-items: center; gap: 10px; }
.brand__mark { width: 30px; height: 26px; color: var(--sage); flex: none; }
.brand__text { display: flex; flex-direction: column; line-height: 1.12; }
.brand__name {
  font-size: 1.0625rem; font-weight: 700; letter-spacing: -.025em; color: var(--ink);
}
.brand__tag { font-size: .6875rem; color: var(--ink-faint); letter-spacing: .01em; }

/* ── 6. Barra de navegación ────────────────────────────────────────────────── */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(251, 248, 243, .72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid transparent;
  transition: background-color .4s var(--ease), border-color .4s var(--ease);
}
.nav.is-stuck {
  background: rgba(251, 248, 243, .86);
  border-bottom-color: var(--line);
}

.nav__inner {
  height: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.nav__links { display: flex; align-items: center; gap: 30px; }
.nav__links a {
  font-size: .875rem;
  font-weight: 500;
  color: var(--ink-soft);
  letter-spacing: -.005em;
}
.nav__links a:hover { color: var(--ink); }
.nav__links .nav__cta { color: #fff; }
.nav__links .nav__cta:hover { color: #fff; }

.nav__toggle {
  display: none;
  width: 40px; height: 40px;
  margin-right: -8px;
  position: relative;
  border-radius: 10px;
}
.nav__bar {
  position: absolute;
  left: 11px;
  width: 18px; height: 1.5px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform .35s var(--ease-out), opacity .2s var(--ease);
}
.nav__bar:nth-child(1) { top: 17px; }
.nav__bar:nth-child(2) { top: 23px; }
.nav__toggle[aria-expanded="true"] .nav__bar:nth-child(1) { transform: translateY(3px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] .nav__bar:nth-child(2) { transform: translateY(-3px) rotate(-45deg); }

/* ── 7. Hero ───────────────────────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding: calc(var(--nav-h) + 56px) 0 88px;
  background: var(--cream);
  overflow: hidden;
  text-align: center;
}
.hero__glow {
  position: absolute;
  top: -28%; left: 50%;
  width: min(1100px, 130vw);
  aspect-ratio: 1;
  transform: translateX(-50%);
  background: radial-gradient(circle at center,
              rgba(125,154,146,.24) 0%,
              rgba(125,154,146,.08) 42%,
              transparent 68%);
  pointer-events: none;
}
.hero__inner { position: relative; display: grid; justify-items: center; gap: 22px; }

.hero__logo img {
  width: clamp(150px, 26vw, 218px);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.hero__title {
  font-size: clamp(2.9rem, 1.2rem + 8.4vw, 6.5rem);
  letter-spacing: -.05em;
  line-height: .95;
}
.hero__title em {
  font-style: normal;
  background: linear-gradient(96deg, var(--sage-deep) 0%, var(--espresso) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__lead { max-width: 56ch; }

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin-top: 8px;
}

.hero__badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 26px;
  margin-top: 14px;
  font-size: .8125rem;
  font-weight: 500;
  color: var(--ink-soft);
}
.hero__badges li { display: flex; align-items: center; gap: 8px; }
.hero__badges li::before {
  content: "";
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--sage);
}

.hero__scroll {
  position: absolute;
  bottom: 26px; left: 50%;
  transform: translateX(-50%);
  width: 22px; height: 34px;
  border: 1.5px solid rgba(29,29,31,.22);
  border-radius: 999px;
}
.hero__scroll span {
  position: absolute;
  top: 7px; left: 50%;
  width: 3px; height: 6px;
  margin-left: -1.5px;
  border-radius: 2px;
  background: var(--ink-faint);
  animation: wheel 1.9s var(--ease) infinite;
}
@keyframes wheel {
  0%   { opacity: 0; transform: translateY(0); }
  35%  { opacity: 1; }
  100% { opacity: 0; transform: translateY(12px); }
}

/* ── 8. Secciones ──────────────────────────────────────────────────────────── */
.section { padding: clamp(76px, 11vw, 140px) 0; }
.section--cream { background: var(--cream); }
.section--light { background: var(--white); }
.section--dark  { background: var(--black); color: #fff; }

.section--dark .lead        { color: rgba(255,255,255,.62); }
.section--dark .eyebrow     { color: #a8c6bd; }
.section--dark .options__label,
.section--dark .product__desc { color: rgba(255,255,255,.72); }
.section--dark .specs li    { color: rgba(255,255,255,.72); border-color: rgba(255,255,255,.12); }
.section--dark .specs li::before { background: #a8c6bd; }
.section--dark .chip        { color: rgba(255,255,255,.86); box-shadow: inset 0 0 0 1.5px rgba(255,255,255,.2); }
.section--dark .chip:hover  { box-shadow: inset 0 0 0 1.5px rgba(255,255,255,.42); }
.section--dark .chip.is-active { background: #fff; color: var(--black); box-shadow: none; }
.section--dark .price__from { color: rgba(255,255,255,.55); }
.section--dark .thumb       { background: #16161a; box-shadow: inset 0 0 0 1px rgba(255,255,255,.1); }
.section--dark .thumb.is-active { box-shadow: inset 0 0 0 2px #fff; }

/* El ancho se fija en píxeles, no en `ch`: la unidad `ch` se calcula sobre el
   tamaño de fuente del contenedor y aquí los títulos son mucho más grandes,
   así que en `ch` quedarían partidos en demasiadas líneas. */
.section__head { max-width: 620px; margin-bottom: clamp(44px, 6vw, 68px); }
.section__head--center { max-width: 740px; margin-inline: auto; text-align: center; }
.section__head--center .lead { margin-inline: auto; max-width: 52ch; }
.section__head .eyebrow { margin-bottom: 16px; }
.section__head .lead    { margin-top: 16px; }

.section__title {
  font-size: clamp(2.1rem, 1.1rem + 4.4vw, 4.1rem);
  letter-spacing: -.042em;
}

/* ── 9. Producto ───────────────────────────────────────────────────────────── */
.product {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  gap: clamp(32px, 5vw, 76px);
  align-items: start;
}
.product--reverse .product__media { order: 2; }

.product__media { position: sticky; top: calc(var(--nav-h) + 28px); }

.gallery__stage {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--cream-soft);
  box-shadow: var(--shadow-lg);
}
.gallery__stage--dark { background: #101012; }
.gallery__stage img {
  width: 100%;
  transition: opacity .4s var(--ease);
}
.gallery__stage.is-swapping img { opacity: 0; }

.gallery__thumbs {
  display: flex;
  gap: 12px;
  margin-top: 14px;
}
.thumb {
  flex: 1 1 0;
  aspect-ratio: 4 / 5;
  padding: 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--cream-soft);
  box-shadow: inset 0 0 0 1px var(--line);
  opacity: .62;
  transition: opacity .3s var(--ease), box-shadow .3s var(--ease), transform .3s var(--ease-out);
}
.thumb img { width: 100%; height: 100%; object-fit: cover; }
.thumb:hover { opacity: .9; transform: translateY(-2px); }
.thumb.is-active { opacity: 1; box-shadow: inset 0 0 0 2px var(--ink); }

.product__info { display: grid; gap: 26px; padding-top: 4px; }

.promo {
  justify-self: start;
  padding: 8px 16px;
  border-radius: 999px;
  background: var(--espresso);
  color: #fff;
  font-size: .8125rem;
  font-weight: 600;
  letter-spacing: .02em;
}
.promo--light { background: #fff; color: var(--black); }

.product__desc {
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--ink-soft);
}

/* Opciones: chips y muestras de color */
.options { display: grid; gap: 12px; }
.options__label {
  font-size: .8125rem;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--ink);
}
.options__hint { font-weight: 400; color: var(--ink-faint); }

.chips, .swatches { display: flex; flex-wrap: wrap; gap: 10px; }

.chip {
  padding: 9px 18px;
  border-radius: 999px;
  font-size: .9375rem;
  font-weight: 500;
  color: var(--ink);
  box-shadow: inset 0 0 0 1.5px var(--line);
  transition: box-shadow .25s var(--ease), background-color .25s var(--ease),
              color .25s var(--ease), transform .25s var(--ease-out);
}
.chip:hover { box-shadow: inset 0 0 0 1.5px rgba(29,29,31,.34); }
.chip.is-active {
  background: var(--ink);
  color: #fff;
  box-shadow: none;
}

.swatch {
  width: 34px; height: 34px;
  padding: 0;
  border-radius: 50%;
  background: var(--tone, #ccc);
  box-shadow: inset 0 0 0 1px rgba(0,0,0,.14);
  transition: transform .25s var(--ease-out), box-shadow .25s var(--ease);
}
.swatch:hover { transform: scale(1.08); }
.swatch.is-active {
  box-shadow: inset 0 0 0 1px rgba(0,0,0,.14),
              0 0 0 2px var(--cream), 0 0 0 4px var(--ink);
}
.section--light .swatch.is-active {
  box-shadow: inset 0 0 0 1px rgba(0,0,0,.14),
              0 0 0 2px #fff, 0 0 0 4px var(--ink);
}
.section--dark .swatch.is-active {
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.2),
              0 0 0 2px var(--black), 0 0 0 4px #fff;
}

.specs { display: grid; gap: 0; }
.specs li {
  padding: 13px 0;
  font-size: .9375rem;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
  display: flex; align-items: center; gap: 12px;
}
.specs li:last-child { border-bottom: 1px solid var(--line); }
.specs li::before {
  content: "";
  width: 5px; height: 5px; flex: none;
  border-radius: 50%;
  background: var(--sage);
}

.buybox {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px 26px;
}
.price { display: grid; gap: 2px; }
.price__from {
  font-size: .75rem; font-weight: 600;
  letter-spacing: .08em; text-transform: uppercase;
  color: var(--ink-faint);
}
.price__value {
  font-size: clamp(1.75rem, 1.2rem + 1.8vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -.04em;
  line-height: 1.05;
}
.price__value--sm {
  font-size: 1.0625rem;
  font-weight: 600;
  letter-spacing: -.01em;
}
.buybox .btn { flex: 1 1 240px; }

/* ── 10. Beneficios ────────────────────────────────────────────────────────── */
.benefits {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}
.benefit {
  padding: 34px 28px 32px;
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: var(--shadow-sm);
  transition: transform .4s var(--ease-out), box-shadow .4s var(--ease);
}
.benefit:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.benefit__icon { width: 34px; height: 34px; margin-bottom: 20px; color: var(--sage-deep); }
.benefit h3 { font-size: 1.0625rem; letter-spacing: -.02em; margin-bottom: 8px; }
.benefit p  { font-size: .9375rem; line-height: 1.5; color: var(--ink-soft); }

/* ── 11. Pasos ─────────────────────────────────────────────────────────────── */
.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(24px, 4vw, 52px);
  counter-reset: step;
}
.step { padding-top: 26px; border-top: 1px solid var(--line); }
.step__num {
  display: block;
  font-size: .8125rem;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--sage-deep);
  margin-bottom: 14px;
}
.step h3 { font-size: 1.3rem; letter-spacing: -.03em; margin-bottom: 10px; }
.step p  { font-size: .9375rem; line-height: 1.55; color: var(--ink-soft); }

/* ── 12. Preguntas frecuentes ──────────────────────────────────────────────── */
.faq {
  border-top: 1px solid var(--line);
  border-radius: 2px;
}
.faq__item { border-bottom: 1px solid var(--line); }
.faq__item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 4px;
  font-size: 1.0625rem;
  font-weight: 600;
  letter-spacing: -.015em;
  cursor: pointer;
  list-style: none;
  transition: color .25s var(--ease);
}
.faq__item summary::-webkit-details-marker { display: none; }
.faq__item summary:hover { color: var(--sage-deep); }
.faq__item summary em { font-style: italic; font-weight: 600; }
.faq__item summary::after {
  content: "";
  width: 13px; height: 13px; flex: none;
  border-right: 1.8px solid var(--ink-faint);
  border-bottom: 1.8px solid var(--ink-faint);
  transform: rotate(45deg) translate(-3px, -3px);
  transition: transform .35s var(--ease-out);
}
.faq__item[open] summary::after { transform: rotate(-135deg) translate(-3px, -3px); }
.faq__body {
  padding: 0 4px 24px;
  max-width: 68ch;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--ink-soft);
  animation: faq-in .4s var(--ease-out);
}
@keyframes faq-in {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: none; }
}

/* ── 13. Llamado final ─────────────────────────────────────────────────────── */
.cta {
  padding: clamp(84px, 12vw, 148px) 0;
  background: linear-gradient(165deg, var(--espresso) 0%, #2a1a13 55%, var(--black) 100%);
  color: #fff;
  text-align: center;
}
.cta__inner { display: grid; justify-items: center; gap: 22px; }
.cta__title {
  font-size: clamp(2.1rem, 1.1rem + 4.4vw, 4rem);
  letter-spacing: -.045em;
}
.cta .lead { color: rgba(255,255,255,.66); max-width: 46ch; }
.cta__note { font-size: .8125rem; color: rgba(255,255,255,.42); }

/* ── 14. Pie de página ─────────────────────────────────────────────────────── */
.footer {
  padding: 68px 0 34px;
  background: var(--cream);
  border-top: 1px solid var(--line);
}
.footer__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 2fr);
  gap: 44px;
  padding-bottom: 44px;
}
.footer__nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 32px;
}
.footer__nav h3 {
  font-size: .8125rem;
  font-weight: 600;
  letter-spacing: .04em;
  margin-bottom: 14px;
}
.footer__nav a, .footer__meta {
  display: block;
  font-size: .875rem;
  line-height: 2;
  color: var(--ink-soft);
}
.footer__nav a:hover { color: var(--ink); }

.footer__legal {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 24px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
  font-size: .78125rem;
  color: var(--ink-faint);
}

/* ── 15. Botón flotante de WhatsApp ────────────────────────────────────────── */
.fab {
  position: fixed;
  right: 20px;
  bottom: max(20px, env(safe-area-inset-bottom));
  z-index: 90;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 20px 13px 16px;
  border-radius: 999px;
  background: var(--wa);
  color: #fff;
  font-size: .9375rem;
  font-weight: 600;
  box-shadow: 0 6px 20px rgba(18,140,126,.36), 0 2px 6px rgba(0,0,0,.12);
  opacity: 0;
  transform: translateY(20px) scale(.94);
  pointer-events: none;
  transition: opacity .45s var(--ease-out), transform .45s var(--ease-out),
              box-shadow .3s var(--ease);
}
.fab.is-visible { opacity: 1; transform: none; pointer-events: auto; }
.fab:hover { box-shadow: 0 10px 28px rgba(18,140,126,.44), 0 2px 6px rgba(0,0,0,.14); }
.fab:active { transform: scale(.97); }
.fab svg { width: 22px; height: 22px; flex: none; }

/* ── 16. Adaptación a pantallas ────────────────────────────────────────────── */

/* Tablet grande */
@media (max-width: 1024px) {
  .product__media { position: static; }
  .benefits { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* Tablet / móvil: menú desplegable y producto en una columna */
@media (max-width: 860px) {
  :root { --gutter: 20px; }

  .nav__toggle { display: block; }

  .nav__links {
    position: fixed;
    inset: var(--nav-h) 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px var(--gutter) 22px;
    background: rgba(251, 248, 243, .94);
    backdrop-filter: saturate(180%) blur(22px);
    -webkit-backdrop-filter: saturate(180%) blur(22px);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 18px 40px rgba(0,0,0,.08);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity .3s var(--ease), transform .35s var(--ease-out),
                visibility .3s var(--ease);
  }
  .nav__links.is-open { opacity: 1; visibility: visible; transform: none; }
  .nav__links a {
    padding: 15px 4px;
    font-size: 1.0625rem;
    font-weight: 500;
    color: var(--ink);
    border-bottom: 1px solid var(--line);
  }
  .nav__links .nav__cta {
    margin-top: 18px;
    border-bottom: 0;
    padding: 14px 24px;
    justify-content: center;
  }

  .product {
    grid-template-columns: minmax(0, 1fr);
    gap: 34px;
  }
  .product--reverse .product__media { order: 0; }

  .section__head { max-width: none; }
  .steps { grid-template-columns: minmax(0, 1fr); gap: 30px; }
}

/* Móvil */
@media (max-width: 640px) {
  body { font-size: 16px; }

  .hero { min-height: auto; padding: calc(var(--nav-h) + 44px) 0 72px; }
  .hero__inner { gap: 18px; }
  .hero__scroll { display: none; }
  .hero__actions { width: 100%; flex-direction: column; }
  .hero__actions .btn { width: 100%; }
  .hero__badges { gap: 8px 18px; font-size: .78125rem; }

  .brand__tag { display: none; }
  .brand__name { font-size: 1rem; }

  .gallery__stage { border-radius: var(--radius); }
  .gallery__thumbs { gap: 8px; }

  .product__info { gap: 22px; }
  .buybox { flex-direction: column; align-items: stretch; gap: 16px; }
  .buybox .btn { flex: none; width: 100%; }
  .price { text-align: left; }

  .benefits { grid-template-columns: minmax(0, 1fr); gap: 14px; }
  .benefit { padding: 26px 22px; }

  .faq__item summary { padding: 18px 2px; font-size: 1rem; }

  .footer__inner { grid-template-columns: minmax(0, 1fr); gap: 34px; }
  .footer__nav { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 26px; }

  /* En móvil el botón flotante se reduce al ícono para no tapar contenido */
  .fab { right: 16px; padding: 15px; gap: 0; }
  .fab__label { display: none; }
}

@media (max-width: 380px) {
  .swatch { width: 30px; height: 30px; }
  .chip { padding: 8px 14px; font-size: .875rem; }
  .footer__nav { grid-template-columns: minmax(0, 1fr); }
}

/* Impresión */
@media print {
  .nav, .fab, .hero__scroll, .gallery__thumbs { display: none !important; }
  body { background: #fff; }
  [data-reveal] { opacity: 1; transform: none; }
}