/* ============================================
   AATECH Consultores — Sistema de diseño propio
   Sin frameworks. Optimizado para Core Web Vitals.
   ============================================ */

:root {
  --azul-950: #0a1628;
  --azul-900: #0f2240;
  --azul-800: #16325c;
  --azul-600: #2563eb;
  --azul-500: #3b82f6;
  --cian-400: #22d3ee;
  --verde-400: #34d399;
  --gris-100: #f1f5f9;
  --gris-200: #e2e8f0;
  --gris-500: #64748b;
  --gris-700: #334155;
  --blanco: #ffffff;
  --radio: 12px;
  --sombra: 0 4px 24px rgba(10, 22, 40, .08);
  --fuente: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--fuente);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--gris-700);
  background: var(--blanco);
  -webkit-font-smoothing: antialiased;
}

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

.contenedor { max-width: 1140px; margin: 0 auto; padding: 0 1.25rem; }

h1, h2, h3 { line-height: 1.2; color: var(--azul-950); margin: 0 0 .6em; font-weight: 800; }
h1 { font-size: clamp(2rem, 4.5vw, 3.25rem); letter-spacing: -.02em; }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); letter-spacing: -.01em; }
h3 { font-size: 1.25rem; }
p { margin: 0 0 1em; }
a { color: var(--azul-600); }

/* ---------- Header ---------- */
.header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--gris-200);
}
.header__inner { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 68px; }
.logo { display: flex; align-items: center; gap: .55rem; font-weight: 800; font-size: 1.2rem; color: var(--azul-950); text-decoration: none; }
.logo__marca { color: var(--azul-600); }
.logo svg { width: 34px; height: 34px; }

.nav { display: flex; align-items: center; gap: 1.05rem; }
.nav a { color: var(--gris-700); text-decoration: none; font-weight: 500; font-size: .9rem; white-space: nowrap; }
.nav a:hover { color: var(--azul-600); }

/* Dropdown servicios (CSS puro) */
.nav__item { position: relative; }
.nav__item > button {
  all: unset; cursor: pointer; color: var(--gris-700); font-weight: 500; font-size: .95rem;
  display: flex; align-items: center; gap: .3rem; padding: 1.2rem 0;
}
.nav__item > button::after { content: ""; border: solid var(--gris-500); border-width: 0 2px 2px 0; padding: 2.5px; transform: rotate(45deg) translateY(-2px); }
.submenu {
  position: absolute; top: 100%; left: 50%; transform: translateX(-50%);
  background: var(--blanco); border: 1px solid var(--gris-200); border-radius: var(--radio);
  box-shadow: var(--sombra); padding: .5rem; min-width: 250px;
  opacity: 0; visibility: hidden; transition: opacity .15s ease;
}
.nav__item:hover .submenu, .nav__item:focus-within .submenu { opacity: 1; visibility: visible; }
.submenu a { display: block; padding: .55rem .8rem; border-radius: 8px; }
.submenu a:hover { background: var(--gris-100); }

.btn {
  display: inline-block; text-decoration: none; font-weight: 700;
  padding: .8rem 1.6rem; border-radius: 999px; transition: transform .15s ease, box-shadow .15s ease;
}
.btn--primario { background: var(--azul-600); color: var(--blanco); }
.btn--primario:hover { background: var(--azul-500); color: var(--blanco); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(37, 99, 235, .35); }
.btn--claro { background: var(--blanco); color: var(--azul-900); }
.btn--claro:hover { background: var(--cian-400); color: var(--azul-950); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(34, 211, 238, .35); }
.btn--borde { border: 2px solid var(--azul-600); color: var(--azul-600); padding: .68rem 1.5rem; }
.btn--borde:hover { background: var(--azul-600); color: var(--blanco); transform: translateY(-2px); }
.btn--borde-claro { border: 2px solid var(--azul-500); color: var(--gris-200); padding: .68rem 1.5rem; }
.btn--borde-claro:hover { background: var(--azul-500); color: var(--blanco); transform: translateY(-2px); }

.menu-toggle { display: none; }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(160deg, var(--azul-950) 0%, var(--azul-800) 70%, var(--azul-600) 130%);
  color: var(--gris-200); padding: 5rem 0 5.5rem; position: relative; overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(600px 300px at 85% 15%, rgba(34, 211, 238, .18), transparent 70%),
    radial-gradient(500px 260px at 10% 90%, rgba(59, 130, 246, .22), transparent 70%);
}
.hero > .contenedor { position: relative; }
.hero h1 { color: var(--blanco); max-width: 780px; }
.hero p { font-size: 1.2rem; max-width: 640px; }
.hero__cta { display: flex; gap: .9rem; flex-wrap: wrap; margin-top: 1.8rem; }
.hero__nota { font-size: .9rem; color: #9db3d4; margin-top: 1.1rem; }

.etiqueta {
  display: inline-block; font-size: .8rem; font-weight: 700; letter-spacing: .06em;
  text-transform: uppercase; color: var(--cian-400); background: rgba(34, 211, 238, .12);
  border: 1px solid rgba(34, 211, 238, .35); padding: .3rem .85rem; border-radius: 999px; margin-bottom: 1.2rem;
}

/* ---------- Secciones ---------- */
.seccion { padding: 4.5rem 0; }
.seccion--gris { background: var(--gris-100); }
.seccion__intro { max-width: 700px; margin-bottom: 2.5rem; }
.seccion__intro p { color: var(--gris-500); font-size: 1.1rem; }

/* Tarjetas de servicio */
.rejilla { display: grid; gap: 1.4rem; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.tarjeta {
  background: var(--blanco); border: 1px solid var(--gris-200); border-radius: var(--radio);
  padding: 1.8rem; box-shadow: var(--sombra); display: flex; flex-direction: column;
  transition: transform .18s ease, box-shadow .18s ease;
}
.tarjeta:hover { transform: translateY(-4px); box-shadow: 0 12px 32px rgba(10, 22, 40, .12); }
.tarjeta__icono {
  width: 48px; height: 48px; border-radius: 10px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--azul-600), var(--cian-400)); margin-bottom: 1.1rem;
}
.tarjeta__icono svg { width: 26px; height: 26px; stroke: var(--blanco); }
.tarjeta p { color: var(--gris-500); font-size: .97rem; flex-grow: 1; }
.tarjeta a { font-weight: 700; text-decoration: none; }
.tarjeta a::after { content: " →"; }

/* Pasos / método */
.pasos { display: grid; gap: 1.4rem; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); counter-reset: paso; }
.paso { position: relative; padding: 1.6rem; background: var(--blanco); border-radius: var(--radio); border: 1px solid var(--gris-200); }
.paso::before {
  counter-increment: paso; content: counter(paso, decimal-leading-zero);
  font-size: 2rem; font-weight: 800; color: var(--azul-600); opacity: .25; display: block; margin-bottom: .4rem;
}

/* Bloques con texto e imagen alterna */
.bloque { display: grid; gap: 2.5rem; grid-template-columns: 1fr 1fr; align-items: center; }
.bloque + .bloque { margin-top: 3.5rem; }
.bloque--invertido > :first-child { order: 2; }
.bloque__visual { background: linear-gradient(145deg, var(--azul-900), var(--azul-600)); border-radius: var(--radio); min-height: 280px; display: grid; place-items: center; color: var(--cian-400); }
.bloque__visual svg { width: 90px; height: 90px; }

/* Lista de ventajas */
.lista-check { list-style: none; padding: 0; margin: 0 0 1.2rem; }
.lista-check li { padding-left: 1.9rem; position: relative; margin-bottom: .65rem; }
.lista-check li::before {
  content: ""; position: absolute; left: 0; top: .32em; width: 1.05em; height: 1.05em;
  background: var(--verde-400); border-radius: 50%;
  -webkit-mask: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="black" stroke-width="3.5" stroke-linecap="round" stroke-linejoin="round"><path d="M20 6L9 17l-5-5"/></svg>') center/contain no-repeat;
          mask: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="black" stroke-width="3.5" stroke-linecap="round" stroke-linejoin="round"><path d="M20 6L9 17l-5-5"/></svg>') center/contain no-repeat;
}

/* FAQ (details nativo, cero JS) */
.faq details { border: 1px solid var(--gris-200); border-radius: var(--radio); margin-bottom: .8rem; background: var(--blanco); }
.faq summary { cursor: pointer; font-weight: 700; color: var(--azul-950); padding: 1.1rem 1.3rem; list-style: none; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 1.2rem; font-size: 1.4rem; color: var(--azul-600); line-height: 1; }
.faq details[open] summary::after { content: "–"; }
.faq details p { padding: 0 1.3rem 1.1rem; color: var(--gris-500); }

/* CTA final */
.cta-final { background: linear-gradient(160deg, var(--azul-950), var(--azul-800)); border-radius: 20px; padding: 3.5rem 2rem; text-align: center; color: var(--gris-200); }
.cta-final h2 { color: var(--blanco); }
.cta-final p { max-width: 560px; margin: 0 auto 1.6rem; }

/* ---------- Formulario ---------- */
.formulario { max-width: 560px; }
.formulario label { display: block; font-weight: 600; color: var(--azul-950); margin: 1.1rem 0 .35rem; }
.formulario input, .formulario textarea, .formulario select {
  width: 100%; padding: .8rem 1rem; border: 1.5px solid var(--gris-200); border-radius: 10px;
  font: inherit; color: var(--gris-700); background: var(--blanco);
}
.formulario input:focus, .formulario textarea:focus { outline: 2px solid var(--azul-500); border-color: transparent; }
.formulario button { margin-top: 1.4rem; border: 0; cursor: pointer; font: inherit; }

/* ---------- Footer ---------- */
.footer { background: var(--azul-950); color: #9db3d4; padding: 3.5rem 0 2rem; font-size: .95rem; }
.footer a { color: #c7d6ee; text-decoration: none; }
.footer a:hover { color: var(--cian-400); }
.footer__rejilla { display: grid; gap: 2rem; grid-template-columns: 2fr 1fr 1fr; margin-bottom: 2.5rem; }
.footer h3 { color: var(--blanco); font-size: 1rem; }
.footer ul { list-style: none; padding: 0; margin: 0; }
.footer li { margin-bottom: .5rem; }
.footer__legal { border-top: 1px solid rgba(255, 255, 255, .1); padding-top: 1.5rem; display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }

/* ---------- Móvil ---------- */
@media (max-width: 1080px) {
  .nav {
    display: none; position: absolute; top: 68px; left: 0; right: 0;
    background: var(--blanco); border-bottom: 1px solid var(--gris-200);
    flex-direction: column; align-items: stretch; padding: 1rem 1.25rem 1.5rem; gap: .2rem;
  }
  .nav a, .nav__item > button { padding: .7rem 0; }
  .submenu { position: static; transform: none; opacity: 1; visibility: visible; box-shadow: none; border: 0; padding: 0 0 0 1rem; display: none; }
  .nav__item:hover .submenu, .nav__item:focus-within .submenu { display: block; }
  .menu-check:checked ~ .nav { display: flex; }
  .menu-toggle { display: block; cursor: pointer; }
  .menu-toggle svg { width: 30px; height: 30px; stroke: var(--azul-950); }
  .bloque { grid-template-columns: 1fr; }
  .bloque--invertido > :first-child { order: 0; }
  .footer__rejilla { grid-template-columns: 1fr; }
  .hero { padding: 3.5rem 0 4rem; }
  .seccion { padding: 3rem 0; }
}
.menu-check { display: none; }