:root {
  --marca: #0f4c81;
  --marca-osc: #0a2f50;
  --marca-clara: #1a6bb0;
  --suave: #eef4fa;
  --texto: #1b2533;
  --tenue: #5b6878;
  --borde: #dbe3ec;
  --blanco: #ffffff;
  --ok: #1f8a4c;
  --error: #c0392b;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--texto);
  line-height: 1.6;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body { margin: 0; background: var(--blanco); }
img, svg { max-width: 100%; }
a { color: var(--marca); }
h1, h2, h3 { line-height: 1.2; margin: 0 0 .5em; }
h1 { font-size: clamp(2rem, 4.5vw, 3.1rem); letter-spacing: -.02em; }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); letter-spacing: -.01em; }
h3 { font-size: 1.15rem; }
.contenedor { width: 100%; max-width: 1160px; margin: 0 auto; padding: 0 20px; }

/* Botones */
.boton { display: inline-block; background: var(--marca); color: #fff; text-decoration: none; font-weight: 600;
  padding: 13px 24px; border-radius: 8px; border: 2px solid var(--marca); cursor: pointer; font: inherit; font-weight: 600;
  transition: background .15s, transform .15s; }
.boton:hover { background: var(--marca-osc); border-color: var(--marca-osc); }
.boton-claro { background: transparent; color: var(--marca); }
.boton-claro:hover { background: var(--suave); border-color: var(--marca); }
.boton-chico { padding: 8px 16px; }
.boton:disabled { opacity: .6; cursor: wait; }

/* Cabecera */
.cabecera { position: sticky; top: 0; z-index: 20; background: rgba(255,255,255,.96); backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent; transition: border-color .2s, box-shadow .2s; }
.cabecera.con-sombra { border-color: var(--borde); box-shadow: 0 2px 12px rgba(15,40,70,.06); }
.barra { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.marca { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--texto); }
.marca b { display: block; letter-spacing: .03em; line-height: 1.1; }
.marca small { color: var(--tenue); font-size: .75rem; }
.logo { width: 40px; height: 40px; border-radius: 9px; background: var(--marca); color: #fff; display: grid; place-items: center; font-weight: 700; }
.menu { display: flex; align-items: center; gap: 26px; }
.menu a:not(.boton) { color: var(--texto); text-decoration: none; font-weight: 500; }
.menu a:not(.boton):hover { color: var(--marca); }
.menu .boton { color: #fff; }
.menu-boton { display: none; background: none; border: 1px solid var(--borde); border-radius: 8px; font-size: 1.3rem; padding: 4px 12px; cursor: pointer; }

/* Hero */
.hero { background: linear-gradient(180deg, var(--suave) 0%, var(--blanco) 100%); padding: 72px 0 64px; }
.hero-rejilla { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
.antetitulo { color: var(--marca-clara); font-weight: 700; text-transform: uppercase; letter-spacing: .1em; font-size: .8rem; margin: 0 0 12px; }
.hero-texto { font-size: 1.15rem; color: var(--tenue); max-width: 560px; }
.acciones { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; }
.ilustracion { width: 100%; height: auto; filter: drop-shadow(0 20px 30px rgba(15,76,129,.15)); }

/* Franja */
.franja { background: var(--marca); color: #fff; }
.franja-rejilla { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; padding-top: 26px; padding-bottom: 26px; }
.franja-rejilla div { display: grid; gap: 2px; }
.franja-rejilla span { opacity: .8; font-size: .92rem; }

/* Franja de marcas */
.franja-marcas { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 14px 28px; padding-top: 22px; padding-bottom: 22px; }
.franja-marcas span { font-weight: 800; letter-spacing: .14em; font-size: .95rem; opacity: .92; }

/* Secciones */
.seccion { padding: 84px 0; }
.seccion-alterna { background: #f6f9fc; }
.seccion-oscura { background: var(--marca-osc); color: #e6eef7; }
.seccion-oscura h2 { color: #fff; }
.seccion-oscura .antetitulo { color: #8fc3f0; }
.intro { color: var(--tenue); font-size: 1.08rem; max-width: 720px; margin: 0 0 36px; }
.nota { margin-top: 28px; color: var(--tenue); }

.tarjetas { display: grid; gap: 22px; }
.tres { grid-template-columns: repeat(3, 1fr); }
.tarjeta { border: 1px solid var(--borde); border-radius: 14px; padding: 28px; background: #fff; transition: box-shadow .2s, transform .2s; }
.tarjeta:hover { box-shadow: 0 14px 30px rgba(15,40,70,.08); transform: translateY(-2px); }
.tarjeta p, .servicio p { color: var(--tenue); margin: 0; }
.icono { width: 52px; height: 52px; border-radius: 12px; background: var(--suave); display: grid; place-items: center; margin-bottom: 18px; }
.icono svg { width: 28px; height: 28px; fill: none; stroke: var(--marca); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.servicio { background: #fff; border-radius: 12px; padding: 24px; border-left: 4px solid var(--marca); box-shadow: 0 1px 3px rgba(15,40,70,.06); }
#servicio h2 { margin-bottom: 36px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 18px; }
.chips span { font-size: .75rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--marca);
  background: var(--suave); border-radius: 99px; padding: 3px 10px; }

.marcas { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 18px; }
.marca-tarjeta { background: #fff; border: 1px solid var(--borde); border-radius: 14px; padding: 24px; }
.marca-tarjeta header { display: flex; justify-content: space-between; align-items: center; gap: 10px; margin-bottom: 10px;
  padding-bottom: 12px; border-bottom: 2px solid var(--suave); }
.marca-tarjeta h3 { margin: 0; letter-spacing: .12em; color: var(--marca-osc); font-weight: 800; }
.marca-tarjeta p { margin: 0; color: var(--tenue); }
.pais { font-size: .75rem; font-weight: 600; color: var(--tenue); border: 1px solid var(--borde); border-radius: 99px; padding: 2px 10px; white-space: nowrap; }
.legal { margin-top: 20px; font-size: .82rem; color: var(--tenue); }

.sectores { list-style: none; padding: 0; margin: 28px 0 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.sectores li { padding: 18px 20px 18px 48px; border: 1px solid var(--borde); border-radius: 10px; position: relative; font-weight: 500; }
.sectores li::before { content: "✓"; position: absolute; left: 18px; top: 17px; color: #fff; background: var(--marca);
  width: 20px; height: 20px; border-radius: 50%; display: grid; place-items: center; font-size: .72rem; }

.nosotros { display: grid; grid-template-columns: 1.4fr .6fr; gap: 48px; align-items: center; }
.cifras { display: grid; gap: 16px; }
.cifras div { border: 1px solid rgba(255,255,255,.18); border-radius: 12px; padding: 20px 24px; }
.cifras b { display: block; font-size: 1.5rem; color: #fff; }
.cifras span { opacity: .75; font-size: .92rem; }

/* Contacto */
.contacto { display: grid; grid-template-columns: .8fr 1.2fr; gap: 56px; align-items: start; }
.datos { list-style: none; padding: 0; margin: 24px 0 0; display: grid; gap: 14px; }
.datos span { display: block; font-size: .78rem; text-transform: uppercase; letter-spacing: .08em; color: var(--tenue); font-weight: 600; }
.formulario { display: grid; gap: 16px; background: #f6f9fc; border: 1px solid var(--borde); border-radius: 16px; padding: 28px; }
.fila-doble { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.formulario label { display: grid; gap: 6px; font-weight: 600; font-size: .9rem; }
.formulario input, .formulario select, .formulario textarea { font: inherit; font-weight: 400; padding: 11px 13px; border: 1px solid var(--borde);
  border-radius: 8px; background: #fff; color: var(--texto); width: 100%; }
.formulario input:focus, .formulario select:focus, .formulario textarea:focus { outline: 3px solid #cfe1f3; border-color: var(--marca); }
.formulario .invalido { border-color: var(--error); }
.oculto { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.estado { margin: 0; min-height: 1.4em; font-weight: 500; }
.estado.ok { color: var(--ok); }
.estado.error { color: var(--error); }

/* Pie */
.pie { background: #07233d; color: #b8c7d8; padding: 36px 0; font-size: .9rem; }
.pie-rejilla { display: grid; grid-template-columns: auto 1fr auto; gap: 24px; align-items: center; }
.pie p { margin: 0; }
.pie .marca { color: #fff; }
.pie .marca small { color: #8aa0b8; }

/* Responsive */
@media (max-width: 900px) {
  .menu-boton { display: block; }
  .menu { position: absolute; top: 68px; left: 0; right: 0; background: #fff; flex-direction: column; align-items: stretch;
    gap: 0; padding: 8px 20px 20px; border-bottom: 1px solid var(--borde); box-shadow: 0 12px 20px rgba(15,40,70,.08); display: none; }
  .menu.abierto { display: flex; }
  .menu a:not(.boton) { padding: 12px 0; border-bottom: 1px solid var(--borde); }
  .menu .boton { margin-top: 14px; text-align: center; }
  .hero { padding: 44px 0; }
  .hero-rejilla, .nosotros, .contacto { grid-template-columns: 1fr; gap: 32px; }
  .hero-visual { max-width: 360px; }
  .tres, .sectores, .franja-rejilla, .marcas { grid-template-columns: 1fr; }
  .franja-marcas { justify-content: center; }
  .seccion { padding: 60px 0; }
  .fila-doble { grid-template-columns: 1fr; }
  .pie-rejilla { grid-template-columns: 1fr; }
}
@media (min-width: 601px) and (max-width: 900px) {
  .tres, .sectores { grid-template-columns: 1fr 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .tarjeta, .boton { transition: none; }
}

/* Botón flotante de WhatsApp */
.whatsapp { position: fixed; right: 20px; bottom: 20px; z-index: 30; width: 58px; height: 58px; border-radius: 50%;
  background: #25d366; display: grid; place-items: center; box-shadow: 0 6px 18px rgba(0,0,0,.25); transition: transform .15s; }
.whatsapp:hover { transform: scale(1.07); }
.whatsapp svg { width: 32px; height: 32px; fill: #fff; }
.pie a { color: #d7e4f2; }
.datos a { text-decoration: none; }
.datos a:hover { text-decoration: underline; }