/* =============================================================
   ALTO DIGITAL — styles.css
   Archetype base: 05 Mouse-Reactive Gradient (adaptado)
   Paleta propia: graphite + azul eléctrico + violeta + ámbar
   (ninguna relación con dark/rojo deportivo de otros proyectos)
   ============================================================= */

/* =============================================================
   1. Tokens
   ============================================================= */
:root {
  /* superficie */
  --bg:        #0b0d12;
  --bg-2:      #11141b;
  --bg-3:      #171b24;   /* card */
  --bg-4:      #1d222c;   /* card hover */
  --paper:     #ffffff;

  /* texto (nunca #fff puro, nunca #000 puro) */
  --ink:       #f1f3f6;
  --ink-soft:  #c7ccd6;
  --ink-mute:  #8b93a3;

  /* acentos — identidad propia de Alto Digital */
  --accent:       #3b82f6;  /* azul eléctrico — confianza/tecnología */
  --accent-soft:  #60a5fa;
  --accent-ink:   #04070d;  /* texto sobre botones de acento */
  --violet:       #8338ec;
  --teal:         #06b6a4;
  --amber:        #f5a623;  /* calidez mexicana, uso puntual */

  --line:        rgba(241,243,246,0.10);
  --line-strong: rgba(241,243,246,0.20);

  --radius-lg: 22px;
  --radius:    14px;
  --radius-sm: 10px;

  --container: 1180px;
  --gutter: 1.25rem;

  --ease-out:    cubic-bezier(0.16, 1, 0.3, 1);
  --ease-soft:   cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);

  --nav-h: 76px;

  --shadow-card: 0 20px 60px -20px rgba(0,0,0,0.55);
  --shadow-btn: 0 10px 30px -8px rgba(59,130,246,0.45);
}

/* =============================================================
   2. Reset & base
   ============================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; }
html {
  -webkit-text-size-adjust: 100%;
  tab-size: 2;
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-h); /* ancla-aware: compensa el nav fijo sin JS */
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}
body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  background: var(--bg);
  color: var(--ink-soft);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: clip;           /* NOT hidden — preserves sticky */
  overscroll-behavior-y: none;
}
img, svg, video { display: block; max-width: 100%; }
img { height: auto; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; }
a { color: inherit; text-decoration: none; }
p { text-wrap: pretty; }
ul { list-style: none; padding: 0; }
h1, h2, h3, h4 {
  font-family: "Space Grotesk", "Inter", sans-serif;
  color: var(--ink);
  text-wrap: balance;
  line-height: 1.08;
  letter-spacing: -0.01em;
  font-weight: 600;
}
::selection { background: var(--accent); color: var(--accent-ink); }

:focus-visible {
  outline: 2px solid var(--accent-soft);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: fixed; top: -100px; left: 1rem;
  padding: .7rem 1.1rem; background: var(--ink); color: var(--bg);
  z-index: 9999; border-radius: 8px; font-weight: 600; font-size: .9rem;
}
.skip-link:focus { top: 1rem; }

/* =============================================================
   3. Utilities
   ============================================================= */
.sr-only {
  position: absolute; width: 1px; height: 1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap;
}
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.section { position: relative; padding-block: clamp(3.5rem, 8vw, 7rem); }
.section-alt { background: var(--bg-2); }
.section-head {
  max-width: 640px;
  margin-bottom: clamp(2rem, 5vw, 3.5rem);
}
.eyebrow {
  display: inline-flex; align-items: center; gap: .5rem;
  font-family: "JetBrains Mono", monospace;
  font-size: .78rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--accent-soft);
  margin-bottom: .9rem;
}
.eyebrow::before {
  content: ""; width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent); flex-shrink: 0;
}
.section-head h2 { font-size: clamp(1.9rem, 4.2vw, 2.9rem); }
.section-head p { color: var(--ink-mute); margin-top: .9rem; font-size: 1.05rem; max-width: 56ch; }
.visually-hidden-label { color: var(--ink-mute); font-size: .95rem; }

/* reveal-on-scroll defensive baseline (gotcha A.4.5) */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s var(--ease-out), transform .7s var(--ease-out); }
.reveal.is-visible { opacity: 1; transform: none; }
.reveal[data-split] { opacity: 1; transform: none; }

/* =============================================================
   4. Buttons
   ============================================================= */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .55rem;
  padding: .95rem 1.6rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: .98rem;
  line-height: 1.2;
  min-height: 48px;
  text-align: center;
  transition: transform .35s var(--ease-out), box-shadow .35s var(--ease-out), background .3s var(--ease-out), color .3s var(--ease-out), border-color .3s var(--ease-out);
}
.btn-primary {
  background: var(--accent);
  color: var(--accent-ink);
  box-shadow: var(--shadow-btn);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 36px -8px rgba(59,130,246,0.6); }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1.5px solid var(--line-strong);
}
.btn-ghost:hover { background: var(--ink); color: var(--bg); border-color: var(--ink); transform: translateY(-2px); }
.btn-whatsapp {
  background: #1fae58;
  color: #04170c;
  box-shadow: 0 10px 30px -8px rgba(31,174,88,0.5);
}
.btn-whatsapp:hover { transform: translateY(-2px); box-shadow: 0 16px 36px -8px rgba(31,174,88,0.65); }
.btn-block { width: 100%; }
.btn-sm { padding: .7rem 1.2rem; font-size: .88rem; min-height: 40px; }
.btn svg { width: 1.15em; height: 1.15em; flex-shrink: 0; }

/* =============================================================
   5. Nav
   ============================================================= */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 500;
  height: var(--nav-h);
  display: flex; align-items: center;
  background: transparent;
  transition: background .4s var(--ease-out), border-color .4s var(--ease-out), height .3s var(--ease-out);
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  background: rgba(11,13,18,0.82);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  border-bottom-color: var(--line);
}
@supports not (backdrop-filter: blur(1px)) {
  .nav.is-scrolled { background: rgba(11,13,18,0.97); }
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; width: 100%; }
.brand { display: inline-flex; align-items: center; gap: .6rem; font-weight: 700; font-size: 1.1rem; color: var(--ink); }
.brand-mark { width: 30px; height: 30px; flex-shrink: 0; }
.nav-links { display: none; align-items: center; gap: 2rem; }
.nav-links a {
  position: relative; font-size: .95rem; font-weight: 500; color: var(--ink-soft);
  padding-block: .3rem;
  transition: color .25s var(--ease-out);
}
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: -2px; height: 1.5px; width: 0;
  background: var(--accent-soft); transition: width .3s var(--ease-out);
}
.nav-links a:hover { color: var(--ink); }
.nav-links a:hover::after { width: 100%; }
.nav-cta { display: none; }
.nav-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px; border-radius: 10px;
  border: 1px solid var(--line-strong);
  color: var(--ink);
}
.nav-toggle svg { width: 20px; height: 20px; }
.icon-bar { transform-origin: 12px 12px; transition: transform .3s var(--ease-out), opacity .2s var(--ease-out); }
.nav-toggle[aria-expanded="true"] .icon-bar-top { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .icon-bar-mid { opacity: 0; }
.nav-toggle[aria-expanded="true"] .icon-bar-bot { transform: translateY(-6px) rotate(-45deg); }

.mobile-menu {
  position: fixed; inset: var(--nav-h) 0 0 0; z-index: 480;
  background: rgba(11,13,18,0.98);
  backdrop-filter: blur(10px);
  display: flex; flex-direction: column; justify-content: center; align-items: center;
  gap: 1.6rem;
  transform: translateY(-12px);
  opacity: 0; pointer-events: none;
  transition: opacity .3s var(--ease-out), transform .3s var(--ease-out);
}
.mobile-menu.is-open { opacity: 1; pointer-events: auto; transform: none; }
.mobile-menu a { font-size: 1.4rem; font-weight: 600; color: var(--ink); }
.mobile-menu .btn { margin-top: .6rem; }

@media (min-width: 960px) {
  .nav-links { display: flex; }
  .nav-cta { display: inline-flex; }
  .nav-toggle { display: none; }
}

/* =============================================================
   6. Hero (mouse-reactive gradient — efecto firma)
   ============================================================= */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: flex; align-items: center;
  padding-top: var(--nav-h);
  overflow: clip;
}
.hero-gradient {
  position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(circle 620px at var(--mx, 28%) var(--my, 32%), rgba(59,130,246,0.38) 0%, transparent 60%),
    radial-gradient(circle 760px at calc(var(--mx, 28%) + 24%) calc(var(--my, 32%) + 30%), rgba(131,56,236,0.32) 0%, transparent 60%),
    radial-gradient(circle 520px at calc(var(--mx, 28%) - 10%) calc(var(--my, 32%) + 55%), rgba(6,182,164,0.22) 0%, transparent 60%),
    radial-gradient(circle 420px at 82% 12%, rgba(245,166,35,0.18) 0%, transparent 55%),
    var(--bg);
  filter: blur(10px);
  transition: background 0.5s var(--ease-soft);
  animation: meshDrift 22s ease-in-out infinite;
}
@keyframes meshDrift {
  0%, 100% { filter: blur(10px) saturate(1); }
  50%      { filter: blur(16px) saturate(1.15); }
}
@media (prefers-reduced-motion: reduce) {
  .hero-gradient { animation: none; }
}
.hero-grid-lines {
  position: absolute; inset: 0; z-index: -1; opacity: .35; pointer-events: none;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(circle at 30% 30%, black, transparent 70%);
}
.hero-inner { position: relative; z-index: 1; padding-block: 3rem; }
.hero-kicker {
  font-family: "JetBrains Mono", monospace;
  font-size: .85rem;
  letter-spacing: .06em;
  color: var(--accent-soft);
  margin-bottom: 1.3rem;
  display: inline-flex; align-items: center; gap: .5rem;
}
.hero-kicker .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--teal); box-shadow: 0 0 0 4px rgba(6,182,164,0.18); }
.hero-title {
  font-size: clamp(2.5rem, 7.2vw, 5.4rem);
  line-height: .98;
  max-width: 16ch;
  margin-bottom: 1.6rem;
}
.hero-title em {
  font-style: normal;
  background: linear-gradient(100deg, var(--accent-soft), var(--violet) 60%, var(--amber));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub {
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  color: var(--ink-mute);
  max-width: 48ch;
  margin-bottom: 2.3rem;
}
.hero-ctas { display: flex; flex-wrap: wrap; gap: 1rem; margin-bottom: 2.6rem; }
.hero-chips { display: flex; flex-wrap: wrap; gap: .7rem; }
.hero-chip {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .55rem .95rem; border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: rgba(241,243,246,0.03);
  font-size: .85rem; color: var(--ink-soft);
}
.hero-chip svg { width: 15px; height: 15px; color: var(--teal); flex-shrink: 0; }

.hero-photo {
  width: clamp(128px, 32vw, 180px);
  margin: 0 auto 1.3rem;
}
.hero-photo-img {
  display: block;
  width: 100%;
  height: auto;
  -webkit-mask-image: linear-gradient(to bottom, #000 80%, transparent 100%);
          mask-image: linear-gradient(to bottom, #000 80%, transparent 100%);
  filter: drop-shadow(0 16px 30px rgba(5,8,16,0.5));
}

@media (min-width: 720px) {
  .hero-title { max-width: 20ch; }
}

@media (min-width: 900px) {
  .hero-inner { position: relative; }
  .hero-photo {
    position: absolute;
    z-index: 0;
    right: 0;
    bottom: -3rem;
    width: clamp(240px, 29vw, 400px);
    margin: 0;
    pointer-events: none;
  }
  .hero-photo-img {
    -webkit-mask-image: linear-gradient(to bottom, #000 70%, transparent 100%);
            mask-image: linear-gradient(to bottom, #000 70%, transparent 100%);
    filter:
      drop-shadow(0 0 60px rgba(59,130,246,0.25))
      drop-shadow(0 28px 48px rgba(5,8,16,0.55));
  }
  .hero-kicker, .hero-title, .hero-sub, .hero-ctas, .hero-chips {
    position: relative;
    z-index: 1;
  }
}

/* =============================================================
   7. Servicios
   ============================================================= */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.1rem;
}
.service-card {
  position: relative;
  background: var(--bg-3);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 1.9rem 1.7rem;
  transition: transform .4s var(--ease-out), border-color .4s var(--ease-out), background .4s var(--ease-out);
  will-change: transform;
}
@media (hover: hover) and (pointer: fine) {
  .service-card:hover {
    background: var(--bg-4);
    border-color: rgba(96,165,250,0.35);
    transform: translateY(-6px) rotateX(2deg);
  }
}
.service-icon {
  width: 46px; height: 46px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, rgba(59,130,246,0.18), rgba(131,56,236,0.14));
  color: var(--accent-soft);
  margin-bottom: 1.3rem;
}
.service-icon svg { width: 22px; height: 22px; }
.service-card h3 { font-size: 1.15rem; margin-bottom: .6rem; }
.service-card p { color: var(--ink-mute); font-size: .95rem; }

/* =============================================================
   8. Portafolio
   ============================================================= */
.portfolio-list {
  display: flex;
  flex-direction: column;
  gap: clamp(2.6rem, 6vw, 4.5rem);
}
.portfolio-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.7rem;
}
/* gotcha: los hijos de grid no encogen bajo su min-content por defecto;
   sin esto, un texto largo (p.ej. el badge de estatus) ensancha la pista
   y desborda el viewport en móvil */
.portfolio-item > * { min-width: 0; }

/* dupla de imágenes: escritorio protagonista + móvil como acento */
.portfolio-media {
  display: grid;
  grid-template-columns: 1fr;
  gap: .7rem;
}
.portfolio-media-main,
.portfolio-media-sub {
  border-radius: var(--radius-lg);
  overflow: clip;
  background: var(--bg-3);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-card);
  aspect-ratio: 8/5;
}
.portfolio-media-sub { aspect-ratio: 16/8; }
.portfolio-media-main img,
.portfolio-media-sub img {
  width: 100%; height: 100%;
  object-fit: cover; object-position: top center;
  transition: transform .6s var(--ease-out);
}
@media (hover: hover) and (pointer: fine) {
  .portfolio-item:hover .portfolio-media-main img,
  .portfolio-item:hover .portfolio-media-sub img { transform: scale(1.035); }
}

.portfolio-info { display: flex; flex-direction: column; align-items: flex-start; }
.portfolio-info .step-num { margin-bottom: .6rem; }
.portfolio-kicker {
  font-family: "JetBrains Mono", monospace;
  font-size: .78rem; letter-spacing: .06em; text-transform: uppercase;
  color: var(--accent-soft); margin-bottom: .6rem;
}
.portfolio-info h3 { font-size: clamp(1.4rem, 2.6vw, 1.8rem); margin-bottom: .7rem; }
.portfolio-problem { color: var(--ink-mute); margin-bottom: 1.3rem; max-width: 52ch; }

.portfolio-chips {
  display: flex; flex-wrap: wrap; gap: .6rem;
  margin-bottom: 1.6rem;
}
.portfolio-chips li {
  display: inline-flex; align-items: center; gap: .45rem;
  padding: .5rem .9rem; border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: rgba(241,243,246,0.03);
  font-size: .83rem; color: var(--ink-soft);
}
.portfolio-chips svg { width: 14px; height: 14px; color: var(--teal); flex-shrink: 0; }

.portfolio-status {
  display: inline-flex; align-items: center; gap: .55rem;
  padding: .6rem 1rem;
  border-radius: 999px;
  background: rgba(245,166,35,0.12);
  border: 1px solid rgba(245,166,35,0.35);
  color: var(--amber);
  font-size: .85rem; font-weight: 600;
}
.portfolio-status svg { width: 16px; height: 16px; flex-shrink: 0; }

@media (min-width: 480px) {
  /* a la par, la fila fija su altura en unidades de viewport (no %, no
     aspect-ratio) y las imágenes la llenan — si cada hija conservara su
     propio aspect-ratio (8/5 vs 9/16) competirían por la altura compartida
     y una desbordaría el track fr; y aspect-ratio en el propio contenedor
     con hijas al 100% de alto crea una dependencia circular que el
     navegador resuelve estirando el bloque por contenido */
  .portfolio-media {
    grid-template-columns: 1.5fr 1fr;
  }
  /* alto explícito e IDÉNTICO en las dos hijas — nada de height:100%
     (porcentaje contra una fila de grid implícita resultó circular en
     pruebas: la fila se seguía calculando por el contenido de la propia
     hija, así que "100%" terminaba siendo su alto natural, no el del
     contenedor) */
  .portfolio-media-main,
  .portfolio-media-sub {
    aspect-ratio: auto;
    height: clamp(220px, 30vw, 320px);
  }
}

@media (min-width: 960px) {
  .portfolio-item {
    grid-template-columns: 1.3fr 1fr;
    gap: 3rem;
    align-items: center;
  }
  .portfolio-item-reverse .portfolio-media { order: 2; }
  .portfolio-item-reverse .portfolio-info { order: 1; }
}

/* =============================================================
   9. Cómo trabajamos
   ============================================================= */
.steps {
  display: grid; gap: 1.1rem;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
}
.step-card {
  background: var(--bg-3);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 1.7rem 1.5rem;
}
.step-num {
  font-family: "Space Grotesk", sans-serif;
  font-size: 2.1rem; font-weight: 700;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--accent-soft);
  margin-bottom: .9rem;
  display: block;
}
.step-card h3 { font-size: 1.05rem; margin-bottom: .5rem; }
.step-card p { color: var(--ink-mute); font-size: .92rem; }

/* =============================================================
   10. Precios
   ============================================================= */
.pricing-grid {
  display: grid; gap: 1.3rem;
  grid-template-columns: 1fr;
}
.price-card {
  background: var(--bg-3);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 2.1rem 1.8rem;
  display: flex; flex-direction: column;
}
.price-card.is-featured {
  border-color: rgba(96,165,250,0.45);
  background: linear-gradient(165deg, var(--bg-4), var(--bg-3));
  box-shadow: var(--shadow-card);
}
.price-card h3 { font-size: 1.2rem; margin-bottom: .6rem; }
.price-tag {
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(1.5rem, 3vw, 1.9rem);
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 1.3rem;
}
.price-tag .cur { font-size: .6em; color: var(--ink-mute); font-weight: 500; }
.price-list { display: flex; flex-direction: column; gap: .65rem; margin-bottom: 1.6rem; flex: 1; }
.price-list li { display: flex; align-items: flex-start; gap: .6rem; font-size: .92rem; color: var(--ink-soft); }
.price-list svg { width: 17px; height: 17px; color: var(--teal); flex-shrink: 0; margin-top: 2px; }
.pricing-note {
  margin-top: 2rem; padding: 1.3rem 1.5rem;
  border-radius: var(--radius);
  background: var(--bg-2);
  border: 1px solid var(--line);
  color: var(--ink-mute); font-size: .92rem;
  display: flex; gap: .8rem; align-items: flex-start;
}
.pricing-note svg { width: 20px; height: 20px; color: var(--amber); flex-shrink: 0; margin-top: 2px; }

@media (min-width: 720px) {
  .pricing-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

/* =============================================================
   11. FAQ (native <details> — accesible, funciona sin JS)
   ============================================================= */
.faq-list { display: flex; flex-direction: column; gap: .75rem; max-width: 760px; }
.faq-item {
  background: var(--bg-3);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: clip;
}
.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: 1.2rem 1.4rem;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  font-weight: 600; color: var(--ink);
  font-size: 1rem;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary .chev {
  width: 20px; height: 20px; flex-shrink: 0; color: var(--accent-soft);
  transition: transform .3s var(--ease-out);
}
.faq-item[open] summary .chev { transform: rotate(180deg); }
.faq-item .faq-answer { padding: 0 1.4rem 1.3rem; color: var(--ink-mute); font-size: .95rem; max-width: 64ch; }

/* =============================================================
   12. Contacto
   ============================================================= */
.contact-section { position: relative; text-align: center; overflow: clip; }
.contact-halo {
  position: absolute; inset: -40% -10% -20% -10%; z-index: -1; pointer-events: none;
  background: radial-gradient(45% 45% at 50% 30%, rgba(59,130,246,0.22), transparent 70%);
  filter: blur(80px);
}
.contact-section h2 { font-size: clamp(2rem, 4.6vw, 3.2rem); max-width: 22ch; margin-inline: auto; }
.contact-section > .container > p { color: var(--ink-mute); max-width: 52ch; margin: 1.1rem auto 2.4rem; font-size: 1.08rem; }
.contact-ctas { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: center; }
.contact-fine { margin-top: 1.6rem; color: var(--ink-mute); font-size: .85rem; }

/* =============================================================
   13. Footer
   ============================================================= */
.footer { border-top: 1px solid var(--line); padding-block: 3rem 7rem; background: var(--bg-2); }
.footer-grid { display: grid; gap: 2.2rem; }
.footer-brand p { color: var(--ink-mute); font-size: .92rem; margin-top: .8rem; max-width: 34ch; }
.footer-col h4 { font-size: .85rem; letter-spacing: .04em; color: var(--ink-mute); text-transform: uppercase; margin-bottom: 1rem; font-family: "Inter", sans-serif; font-weight: 600; }
.footer-col ul { display: flex; flex-direction: column; gap: .65rem; }
.footer-col a { color: var(--ink-soft); font-size: .92rem; transition: color .25s var(--ease-out); }
.footer-col a:hover { color: var(--ink); }
.footer-bottom {
  margin-top: 2.6rem; padding-top: 1.6rem; border-top: 1px solid var(--line);
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: .8rem;
  font-size: .82rem; color: var(--ink-mute);
}
@media (min-width: 720px) {
  .footer-grid { grid-template-columns: minmax(0,1.4fr) minmax(0,1fr) minmax(0,1fr); }
}
@media (min-width: 960px) {
  .footer { padding-block: 3.5rem 3.5rem; }
}

/* =============================================================
   14. Barra flotante móvil (CTA sticky — solo <960px)
   ============================================================= */
.mobile-cta-bar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 400;
  display: flex; gap: .7rem;
  padding: .7rem var(--gutter) calc(.7rem + env(safe-area-inset-bottom, 0px));
  background: rgba(11,13,18,0.92);
  backdrop-filter: blur(14px);
  border-top: 1px solid var(--line);
}
.mobile-cta-bar .btn { flex: 1; white-space: normal; text-align: center; line-height: 1.15; font-size: .82rem; padding-inline: .6rem; }
.mobile-cta-bar .btn svg { width: 1rem; height: 1rem; }
@media (min-width: 960px) {
  .mobile-cta-bar { display: none; }
}
body { padding-bottom: 72px; }
@media (min-width: 960px) {
  body { padding-bottom: 0; }
}

/* =============================================================
   15. Breakpoints de referencia (mobile-first)
   540 / 720 / 960 / 1280 / 1600
   ============================================================= */
@media (min-width: 1280px) {
  .section { padding-block: clamp(4.5rem, 7vw, 8.5rem); }
}

/* =============================================================
   16. Reduced motion — solo gatea lo intrusivo (gotcha A.2)
   ============================================================= */
@media (prefers-reduced-motion: reduce) {
  .mockup-frame { animation: none; }
  .reveal { transition-duration: .2s; }
}