/* =====================================================================
   VASLOTH STORE — hoja de estilos única
   Tokens de marca tomados de vasloth.com (misma paleta, tipografía, radios).

   Índice
     1. Tokens y base
     2. Componentes comunes: eyebrow, botones, nav, puente B2B, footer
     3. Home: hero, franja de confianza, grilla de productos, diferencial, kits
     4. Página de producto / kit
     5. Animaciones y accesibilidad
     6. Responsive (tablet → celular)
   ===================================================================== */

/* ============================ 1. TOKENS ============================ */
:root {
  /* Superficie */
  --bg:        #ffffff;
  --bg-soft:   #f6f5f2;   /* off-white cálido para bandas alternas */
  --bg-card:   #ffffff;
  --ink:       #0a0a0a;   /* casi negro */
  --ink-2:     #55534e;   /* gris cálido, texto secundario */
  --ink-3:     #8f8c85;   /* gris etiquetas */
  --line:      rgba(10,10,10,0.09);
  --line-2:    rgba(10,10,10,0.16);

  /* Marca */
  --accent:      #b5651d;  /* cobre */
  --accent-2:    #e0a96d;  /* ámbar (sobre fondo oscuro) */
  --accent-soft: rgba(181,101,29,0.10);

  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-body:    'Inter', system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', ui-monospace, monospace;

  --nav-h: 68px;
  --maxw: 1240px;
  --r: 18px;      /* radio de tarjetas */
  --r-sm: 12px;   /* radio de botones */
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  padding-top: var(--nav-h); /* deja lugar al nav fijo */
}
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 600; letter-spacing: -0.03em; line-height: 1.05; overflow-wrap: break-word; }
a { color: inherit; }
img { max-width: 100%; display: block; }
[hidden] { display: none !important; }
/* Evita que contenido ancho (bloques de código, tablas) ensanche las columnas de grid/flex y rompa el viewport en celular */
.grid > *, .producto-top > *, .producto-body > *, .diff-grid > *, .bridge-inner > *, .footer-grid > *, .bloque, .pcard-body { min-width: 0; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 2rem; }
.section { max-width: var(--maxw); margin: 0 auto; padding: 5.5rem 2rem; }
.section-head { max-width: 720px; margin-bottom: 2.4rem; }
.section-head h2 { font-size: clamp(1.9rem, 4.2vw, 3rem); margin: 1rem 0 .8rem; letter-spacing: -.04em; }
.section-head p { font-size: 1.08rem; color: var(--ink-2); font-weight: 300; max-width: 620px; }

/* ====================== 2. COMPONENTES COMUNES ====================== */
.eyebrow {
  font-family: var(--font-mono); font-size: .72rem; letter-spacing: .22em; text-transform: uppercase;
  color: var(--ink-3); display: inline-flex; align-items: center; gap: .6rem;
}
.eyebrow::before { content: ''; width: 22px; height: 1px; background: var(--accent); flex: 0 0 auto; }
.eyebrow.light { color: rgba(255,255,255,.55); }

/* Botones (mismos que vasloth.com) */
.btn-solid, .btn-outline, .btn-ghost {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  padding: .95rem 1.6rem; border-radius: var(--r-sm); font-family: var(--font-body);
  font-size: .92rem; font-weight: 500; text-decoration: none; cursor: pointer;
  transition: all .28s var(--ease); border: 1px solid transparent; text-align: center;
}
.btn-solid { background: var(--ink); color: #fff; border-color: var(--ink); }
.btn-solid:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(10,10,10,.16); }
.btn-outline { border-color: var(--line-2); color: var(--ink); background: #fff; }
.btn-outline:hover { border-color: var(--ink); transform: translateY(-2px); }
.btn-ghost { color: var(--ink-2); border-color: var(--line); background: rgba(255,255,255,.5); }
.btn-ghost:hover { color: var(--ink); border-color: var(--line-2); }
/* variantes sobre fondo oscuro */
.btn-solid.light { background: #fff; color: var(--ink); border-color: #fff; }
.btn-solid.light:hover { box-shadow: 0 12px 28px rgba(0,0,0,.4); }
.btn-outline.light { border-color: rgba(255,255,255,.3); color: #fff; background: transparent; }
.btn-outline.light:hover { border-color: #fff; }

.link-arrow { color: var(--accent); text-decoration: none; font-size: .9rem; font-weight: 500; display: inline-flex; align-items: center; gap: .4rem; transition: gap .25s var(--ease); white-space: nowrap; }
.link-arrow:hover { gap: .7rem; }

/* ---------- NAV ---------- */
nav.nav {
  position: fixed; top: 0; left: 0; width: 100%; height: var(--nav-h);
  background: rgba(255,255,255,0.78);
  backdrop-filter: saturate(180%) blur(20px); -webkit-backdrop-filter: saturate(180%) blur(20px);
  z-index: 100; border-bottom: 1px solid transparent;
  transition: border-color .3s var(--ease);
}
nav.nav.scrolled { border-bottom-color: var(--line); }
.nav-inner { max-width: var(--maxw); margin: 0 auto; height: 100%; padding: 0 2rem; display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
.brand { display: flex; align-items: center; gap: .6rem; text-decoration: none; }
.brand img { height: 24px; width: auto; filter: brightness(0); }
.brand .wordmark { font-family: var(--font-display); font-weight: 700; font-size: 1.05rem; letter-spacing: -.02em; white-space: nowrap; }
.brand .wordmark span { color: var(--accent); font-weight: 500; }
.nav-links { display: flex; gap: 1.8rem; align-items: center; }
.nav-links a { text-decoration: none; color: var(--ink-2); font-size: .88rem; font-weight: 500; transition: color .25s; }
.nav-links a:hover, .nav-links a.active { color: var(--ink); }
.btn-nav {
  border: 1px solid var(--line-2); color: var(--ink) !important;
  padding: .5rem 1.05rem; border-radius: 10px; font-size: .84rem;
  transition: all .25s var(--ease) !important; display: inline-flex; align-items: center; gap: .45rem;
}
.btn-nav:hover { border-color: var(--ink); background: var(--ink); color: #fff !important; }
.mobile-menu-btn { display: none; background: none; border: none; color: var(--ink); cursor: pointer; padding: .4rem; }

/* ---------- PUENTE B2B ---------- */
.bridge { position: relative; background: var(--ink); color: #fff; overflow: hidden; }
.bridge-glow { position: absolute; top: -40%; right: -10%; width: 720px; height: 720px; pointer-events: none; background: radial-gradient(closest-side, rgba(224,169,109,.18), transparent 70%); }
.bridge-inner { position: relative; max-width: var(--maxw); margin: 0 auto; padding: 6.5rem 2rem; display: grid; grid-template-columns: 1.3fr 1fr; gap: 3.5rem; align-items: center; }
.bridge h2 { font-size: clamp(2rem, 4.8vw, 3.4rem); letter-spacing: -.045em; margin: 1rem 0 1.1rem; }
.bridge h2 .accent { color: var(--accent-2); }
.bridge p { font-size: 1.1rem; color: rgba(255,255,255,.65); font-weight: 300; max-width: 560px; margin-bottom: 2.2rem; }
.bridge-cta { display: flex; gap: .9rem; flex-wrap: wrap; }
.lines { display: grid; gap: .8rem; }
.line-card { border: 1px solid rgba(255,255,255,.12); border-radius: 14px; padding: 1.1rem 1.3rem; display: flex; gap: 1rem; align-items: baseline; background: rgba(255,255,255,.03); text-decoration: none; transition: border-color .3s var(--ease), background .3s var(--ease); }
.line-card:hover { border-color: rgba(224,169,109,.5); background: rgba(255,255,255,.05); }
.line-card b { font-family: var(--font-display); font-size: 1.05rem; letter-spacing: -.02em; min-width: 64px; color: var(--accent-2); }
.line-card span { font-size: .9rem; color: rgba(255,255,255,.7); font-weight: 300; }

/* ---------- FOOTER ---------- */
footer.footer { background: var(--ink); color: #fff; padding: 4rem 2rem 2.2rem; border-top: 1px solid rgba(255,255,255,.12); }
.footer-grid { max-width: var(--maxw); margin: 0 auto; display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 3rem; padding-bottom: 3rem; border-bottom: 1px solid rgba(255,255,255,.12); }
.footer-brand img { height: 28px; width: auto; filter: brightness(0) invert(1); opacity: .9; margin-bottom: 1.1rem; }
.footer-brand p { color: rgba(255,255,255,.55); font-size: .93rem; font-weight: 300; max-width: 280px; }
.footer-col h4 { font-family: var(--font-mono); font-size: .68rem; letter-spacing: .18em; text-transform: uppercase; color: rgba(255,255,255,.4); margin-bottom: 1.2rem; font-weight: 500; }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: .7rem; }
.footer-col a { color: rgba(255,255,255,.7); text-decoration: none; font-size: .92rem; transition: color .25s; }
.footer-col a:hover { color: #fff; }
.footer-bottom { max-width: var(--maxw); margin: 0 auto; padding-top: 1.8rem; display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap; }
.footer-bottom p { font-family: var(--font-mono); font-size: .7rem; letter-spacing: .08em; color: rgba(255,255,255,.4); }
.footer-bottom .socials { display: flex; gap: 1.2rem; }
.footer-bottom .socials a { color: rgba(255,255,255,.55); font-size: .78rem; font-family: var(--font-mono); letter-spacing: .05em; text-decoration: none; transition: color .25s; }
.footer-bottom .socials a:hover { color: var(--accent-2); }

/* ============================= 3. HOME ============================= */
/* ---------- HERO ---------- */
.hero { position: relative; padding: 5rem 2rem 4rem; text-align: center; overflow: hidden; }
.hero-glow { position: absolute; top: -30%; left: 50%; transform: translateX(-50%); width: 900px; height: 560px; pointer-events: none; background: radial-gradient(closest-side, var(--accent-soft), transparent 70%); }
.hero-inner { position: relative; max-width: 840px; margin: 0 auto; display: flex; flex-direction: column; align-items: center; }
.hero h1 { font-size: clamp(2.3rem, 6vw, 4.4rem); letter-spacing: -.045em; margin: 1.1rem 0 1.2rem; }
.hero h1 .accent { color: var(--accent); }
.hero p { font-size: clamp(1rem, 1.5vw, 1.18rem); color: var(--ink-2); font-weight: 300; max-width: 620px; margin-bottom: 2.2rem; }
.hero-cta { display: flex; gap: .9rem; flex-wrap: wrap; justify-content: center; }

/* ---------- FRANJA DE CONFIANZA ---------- */
.trust { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--bg-soft); }
.trust-inner { max-width: var(--maxw); margin: 0 auto; padding: 1.7rem 2rem; display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
.stat { display: flex; flex-direction: column; gap: .15rem; padding-left: 1rem; position: relative; }
.stat::before { content: ''; position: absolute; left: 0; top: .3rem; bottom: .3rem; width: 2px; background: var(--accent); opacity: .55; border-radius: 2px; }
.stat .num { font-family: var(--font-display); font-size: 1.08rem; font-weight: 600; letter-spacing: -.02em; }
.stat .lbl { font-family: var(--font-mono); font-size: .62rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-3); }

/* ---------- FILTROS ---------- */
.chips { display: flex; gap: .5rem; flex-wrap: wrap; margin-bottom: 1.8rem; }
.chip {
  font-family: var(--font-mono); font-size: .68rem; letter-spacing: .1em; text-transform: uppercase;
  padding: .5rem .85rem; border: 1px solid var(--line-2); border-radius: 999px; color: var(--ink-2);
  background: #fff; cursor: pointer; text-decoration: none; transition: all .25s var(--ease);
}
.chip:hover { border-color: var(--ink); color: var(--ink); }
.chip.on { background: var(--ink); color: #fff; border-color: var(--ink); }

/* ---------- GRILLA DE PRODUCTOS ---------- */
.grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.25rem; }
.grid-vacio { padding: 3rem 1rem; text-align: center; color: var(--ink-3); font-family: var(--font-mono); font-size: .75rem; letter-spacing: .12em; text-transform: uppercase; border: 1px dashed var(--line-2); border-radius: var(--r); }
.pcard {
  position: relative; background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--r);
  overflow: hidden; display: flex; flex-direction: column;
  transition: transform .5s var(--ease), box-shadow .5s var(--ease), border-color .5s var(--ease);
}
.pcard:hover { transform: translateY(-6px); box-shadow: 0 24px 60px rgba(10,10,10,.10); border-color: var(--line-2); }
.pcard-media { position: relative; aspect-ratio: 4 / 3; background: var(--bg-soft); border-bottom: 1px solid var(--line); overflow: hidden; display: block; }
.pcard-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s var(--ease); }
.pcard:hover .pcard-media img:not(.is-placeholder) { transform: scale(1.04); }
.pcard-media img.is-placeholder { object-fit: cover; }
.tag {
  position: absolute; top: .75rem; left: .75rem; z-index: 2; font-family: var(--font-mono); font-size: .6rem; letter-spacing: .1em;
  padding: .3rem .55rem; border-radius: 6px; display: inline-flex; align-items: center; gap: .4rem;
  background: rgba(255,255,255,.9); border: 1px solid var(--line); color: var(--ink); backdrop-filter: blur(6px);
}
.tag::before { content: ''; width: 5px; height: 5px; border-radius: 50%; background: var(--accent); }
.tag.off { color: var(--ink-3); } .tag.off::before { background: var(--ink-3); }
.pcard-body { padding: 1.15rem 1.25rem 1.25rem; display: flex; flex-direction: column; gap: .35rem; flex: 1; }
.pcat { font-family: var(--font-mono); font-size: .62rem; letter-spacing: .16em; text-transform: uppercase; color: var(--ink-3); }
.pcard h3 { font-size: 1.1rem; line-height: 1.2; }
.pcard h3 a { text-decoration: none; }
.pcard h3 a::after { content: ''; position: absolute; inset: 0; } /* toda la tarjeta es clickeable */
.pcard-body p { font-size: .88rem; color: var(--ink-2); font-weight: 300; flex: 1; }
.prow { display: flex; justify-content: space-between; align-items: center; gap: .6rem; margin-top: .6rem; padding-top: .85rem; border-top: 1px solid var(--line); }
.price { font-family: var(--font-display); font-weight: 600; font-size: 1.08rem; letter-spacing: -.02em; }
.price small { display: block; font-family: var(--font-mono); font-size: .58rem; letter-spacing: .1em; color: var(--ink-3); font-weight: 400; text-transform: uppercase; }

/* ---------- DIFERENCIAL ---------- */
.diff { background: var(--bg-soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.diff-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
.dcard { background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 1.9rem; transition: transform .5s var(--ease), box-shadow .5s var(--ease); }
.dcard:hover { transform: translateY(-4px); box-shadow: 0 20px 50px rgba(10,10,10,.08); }
.dcard .n { font-family: var(--font-mono); font-size: .7rem; letter-spacing: .2em; color: var(--accent); margin-bottom: 1rem; display: block; }
.dcard h3 { font-size: 1.28rem; margin-bottom: .55rem; }
.dcard p { font-size: .93rem; color: var(--ink-2); font-weight: 300; }

/* ---------- KITS ---------- */
.kits-soon { border: 1px dashed var(--line-2); border-radius: var(--r); padding: 3.2rem 1.5rem; text-align: center; display: flex; flex-direction: column; align-items: center; gap: .4rem; background: var(--bg-soft); }
.kits-soon .soon { font-family: var(--font-mono); font-size: .68rem; letter-spacing: .2em; text-transform: uppercase; color: var(--accent); }
.kits-soon p { font-size: .95rem; color: var(--ink-2); font-weight: 300; }
.kits-soon .btn-ghost { margin-top: 1rem; }

/* ======================= 4. PÁGINA DE PRODUCTO ======================= */
.producto { padding-top: 2rem; }
.migas { font-family: var(--font-mono); font-size: .66rem; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3); display: flex; gap: .6rem; flex-wrap: wrap; margin-bottom: 1.8rem; }
.migas a { text-decoration: none; color: var(--ink-2); transition: color .25s; }
.migas a:hover { color: var(--ink); }

.producto-top { display: grid; grid-template-columns: 1.1fr 1fr; gap: 3.5rem; align-items: start; margin-bottom: 4rem; }

/* Galería */
.galeria-main { aspect-ratio: 4 / 3; border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; background: var(--bg-soft); }
.galeria-main img { width: 100%; height: 100%; object-fit: cover; }
.galeria-thumbs { display: flex; gap: .6rem; margin-top: .8rem; flex-wrap: wrap; }
.galeria-thumbs button { width: 76px; aspect-ratio: 1; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; background: var(--bg-soft); padding: 0; cursor: pointer; transition: border-color .25s var(--ease); }
.galeria-thumbs button img { width: 100%; height: 100%; object-fit: cover; }
.galeria-thumbs button.on, .galeria-thumbs button:hover { border-color: var(--ink); }

/* Ficha (columna derecha, se queda fija al scrollear en desktop) */
.ficha { position: sticky; top: calc(var(--nav-h) + 1.5rem); }
.ficha h1 { font-size: clamp(1.9rem, 3.5vw, 2.8rem); margin: .8rem 0 .8rem; letter-spacing: -.04em; }
.ficha-resumen { color: var(--ink-2); font-weight: 300; font-size: 1.08rem; margin-bottom: 1.6rem; }
.ficha-precio { display: flex; align-items: center; gap: 1.2rem; margin-bottom: 1.4rem; flex-wrap: wrap; }
.ficha-precio .precio { font-family: var(--font-display); font-size: 2.1rem; font-weight: 600; letter-spacing: -.03em; line-height: 1; }
.ficha-precio .precio small { display: block; font-family: var(--font-mono); font-size: .6rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-3); font-weight: 400; margin-top: .35rem; }
.stock { font-family: var(--font-mono); font-size: .66rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-2); display: inline-flex; align-items: center; gap: .45rem; }
.stock::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.stock.off { color: var(--ink-3); } .stock.off::before { background: var(--ink-3); box-shadow: none; }
.ficha-cta { display: flex; flex-direction: column; gap: .7rem; margin-bottom: 1.5rem; }
.incluye { list-style: none; display: flex; gap: .5rem; flex-wrap: wrap; }
.incluye li { font-family: var(--font-mono); font-size: .62rem; letter-spacing: .1em; text-transform: uppercase; padding: .42rem .7rem; border: 1px solid var(--line); border-radius: 999px; color: var(--ink-2); background: var(--bg-soft); }
.incluye li::before { content: '✓ '; color: var(--accent); }

/* Cuerpo: descripción + specs */
.producto-body { display: grid; grid-template-columns: 1.4fr 1fr; gap: 3.5rem; align-items: start; padding-top: 3.5rem; border-top: 1px solid var(--line); }
.bloque { margin-bottom: 2.6rem; }
.bloque h2 { font-size: clamp(1.4rem, 2.5vw, 1.9rem); margin: .7rem 0 .8rem; }
.bloque p { color: var(--ink-2); font-weight: 300; margin-bottom: .8rem; }
.bloque > ul { padding-left: 1.2rem; color: var(--ink-2); font-weight: 300; }
.bloque > ul li { margin-bottom: .45rem; }
.bloque strong { color: var(--ink); font-weight: 500; }
.bloque code { font-family: var(--font-mono); font-size: .84em; background: var(--bg-soft); border: 1px solid var(--line); border-radius: 5px; padding: .08em .35em; color: var(--ink); }

.usos { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.usos > div { border: 1px solid var(--line); border-radius: 14px; padding: 1.2rem 1.3rem; }
.usos h3 { font-size: .8rem; margin-bottom: .7rem; font-family: var(--font-mono); letter-spacing: .12em; text-transform: uppercase; font-weight: 500; }
.usos .si h3 { color: var(--accent); } .usos .no h3 { color: var(--ink-3); }
.usos ul { list-style: none; }
.usos li { position: relative; padding-left: 1.2rem; font-size: .92rem; color: var(--ink-2); font-weight: 300; margin-bottom: .45rem; }
.usos .si li::before { content: '✓'; position: absolute; left: 0; color: var(--accent); }
.usos .no li::before { content: '✕'; position: absolute; left: 0; color: var(--ink-3); }

.codigo { max-width: 100%; background: var(--ink); color: #e8e6e1; font-family: var(--font-mono); font-size: .78rem; border-radius: var(--r-sm); padding: 1.1rem 1.3rem; overflow-x: auto; line-height: 1.6; margin: .6rem 0 1rem; white-space: pre; tab-size: 2; }
.codigo .c { color: rgba(255,255,255,.4); }
.codigo .k { color: var(--accent-2); }

.producto-specs { position: sticky; top: calc(var(--nav-h) + 1.5rem); border: 1px solid var(--line); border-radius: var(--r); padding: 1.9rem; background: var(--bg-soft); }
.producto-specs h2 { font-size: 1.25rem; margin-bottom: 1.1rem; }
.specs { display: grid; grid-template-columns: auto 1fr; gap: .6rem 1.2rem; font-size: .9rem; }
.specs dt { font-family: var(--font-mono); font-size: .64rem; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3); padding-top: .25rem; white-space: nowrap; }
.specs dd { color: var(--ink); font-weight: 400; min-width: 0; overflow-wrap: anywhere; }
.specs-guia { margin-top: 1.6rem; padding-top: 1.4rem; border-top: 1px solid var(--line-2); }
.specs-guia p { font-size: .9rem; color: var(--ink-2); font-weight: 300; margin: .6rem 0 .8rem; }

.relacionados { padding-top: 0; }

/* ================== 5. ANIMACIONES Y ACCESIBILIDAD ================== */
.js .reveal { opacity: 0; transform: translateY(24px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.revealed { opacity: 1; transform: none; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

@media (prefers-reduced-motion: reduce) {
  .js .reveal { opacity: 1; transform: none; transition: none; }
  .pcard, .dcard, .btn-solid, .btn-outline { transition: none; }
}

/* ========================== 6. RESPONSIVE ========================== */
@media (max-width: 1000px) {
  .grid { grid-template-columns: repeat(2, 1fr); }
  .diff-grid { grid-template-columns: 1fr 1fr; }
  .bridge-inner { grid-template-columns: 1fr; gap: 2.5rem; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2.5rem; }
  .producto-top { grid-template-columns: 1fr; gap: 2rem; }
  .ficha, .producto-specs { position: static; }
  .producto-body { grid-template-columns: 1fr; gap: 2.5rem; }
}

@media (max-width: 768px) {
  :root { --nav-h: 62px; }
  .nav-inner, .wrap, .section, .hero, .trust-inner, .bridge-inner, footer.footer { padding-left: 1.25rem; padding-right: 1.25rem; }
  .nav-links {
    display: none; position: absolute; top: var(--nav-h); left: 0; width: 100%; flex-direction: column; align-items: stretch; gap: .25rem;
    padding: 1.1rem 1.25rem 1.4rem; background: rgba(255,255,255,.97); backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--line); box-shadow: 0 20px 40px rgba(10,10,10,.06);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: .75rem .25rem; font-size: 1rem; }
  .nav-links .btn-nav { margin-top: .5rem; justify-content: center; }
  .mobile-menu-btn { display: block; }

  .hero { padding-top: 3.5rem; padding-bottom: 2.8rem; }
  .hero-cta { width: 100%; } .hero-cta a { flex: 1; }
  .trust-inner { grid-template-columns: 1fr 1fr; gap: 1rem; padding-top: 1.3rem; padding-bottom: 1.3rem; }
  .section { padding-top: 3.8rem; padding-bottom: 3.8rem; }

  /* filtros en una línea con scroll horizontal */
  .chips { flex-wrap: nowrap; overflow-x: auto; padding-bottom: .3rem; scrollbar-width: none; margin-left: -1.25rem; margin-right: -1.25rem; padding-left: 1.25rem; padding-right: 1.25rem; }
  .chips::-webkit-scrollbar { display: none; }
  .chip { white-space: nowrap; flex: 0 0 auto; }

  /* grilla: 2 columnas en celular, tarjetas compactas */
  .grid { grid-template-columns: 1fr 1fr; gap: .8rem; }
  .pcard-body { padding: .9rem .9rem 1rem; }
  .pcard h3 { font-size: .98rem; }
  .pcard-body p { display: none; }
  .prow { flex-direction: column; align-items: stretch; gap: .5rem; }
  .price small { display: none; }
  .link-arrow { font-size: .84rem; }

  .diff-grid { grid-template-columns: 1fr; }
  .bridge-inner { padding-top: 4rem; padding-bottom: 4rem; }
  .bridge-cta { flex-direction: column; } .bridge-cta a { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }

  .producto { padding-top: 1.2rem; }
  .ficha-precio .precio { font-size: 1.8rem; }
  .usos { grid-template-columns: 1fr; }
  .producto-specs { padding: 1.4rem; }
  .specs { grid-template-columns: 1fr; gap: .2rem; }
  .specs dt { padding-top: .6rem; }
  .galeria-thumbs button { width: 60px; }
}

@media (max-width: 340px) {
  .grid { grid-template-columns: 1fr; }
}