:root { --primary: #0056b3; --secondary: #003d80; --accent: #00a8e8; --text: #333; --light: #f4f7f9; --white: #ffffff; }
* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Segoe UI', Tahoma, sans-serif; }
body { line-height: 1.6; color: var(--text); background: var(--white); position: relative; overflow-x: hidden; }

/* LOGO DE FONDO OPTIMIZADO (Elegante y sutil) */
body::after {
    content: '';
    position: fixed;
    bottom: -50px;
    right: -50px;
    width: 500px;
    height: 500px;
    background-image: url('assets/logos/logo.png');
    background-size: contain;
    background-repeat: no-repeat;
    background-position: bottom right;
    opacity: 0.04; /* Muy sutil para elegancia */
    z-index: -1;
    pointer-events: none;
}

header { background: var(--white); padding: 1rem 5%; display: flex; justify-content: space-between; align-items: center; position: sticky; top: 0; z-index: 1000; box-shadow: 0 2px 10px rgba(0,0,0,0.05); }
.logo img { height: 45px; }
nav ul { display: flex; list-style: none; }
nav ul li { margin-left: 25px; }
nav ul li a { text-decoration: none; color: var(--primary); font-weight: 600; transition: 0.3s; font-size: 0.95rem; }
nav ul li a:hover { color: var(--accent); }

.hero { background: linear-gradient(rgba(0,86,179,0.88), rgba(0,61,128,0.88)), url('https://images.unsplash.com/photo-1451187580459-43490279c0fa?auto=format&fit=crop&w=1352&q=80'); background-size: cover; background-position: center; color: white; text-align: center; padding: 10rem 10%; }
.hero h1 { font-size: 3.8rem; margin-bottom: 1.5rem; font-weight: 800; line-height: 1.1; }
.hero p { font-size: 1.4rem; max-width: 750px; margin: 0 auto 2.5rem auto; opacity: 0.9; }

section { padding: 6rem 10%; position: relative; }
.section-light { background: var(--light); }
h2 { text-align: center; color: var(--primary); margin-bottom: 4rem; font-size: 2.6rem; font-weight: 700; }
h2::after { content: ''; width: 60px; height: 4px; background: var(--accent); position: absolute; bottom: -15px; left: 50%; transform: translateX(-50%); }

.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 2.5rem; }
.card { background: white; padding: 3rem 2rem; border-radius: 15px; box-shadow: 0 15px 35px rgba(0,0,0,0.04); transition: 0.4s; border-top: 6px solid var(--primary); text-align: center; }
.card:hover { transform: translateY(-12px); box-shadow: 0 20px 45px rgba(0,0,0,0.08); }
.card i { font-size: 2.8rem; color: var(--accent); margin-bottom: 1.5rem; }
.card img { height: 55px; margin-bottom: 2rem; object-fit: contain; filter: grayscale(10%); }
.card h3 { margin-bottom: 1rem; color: var(--secondary); font-size: 1.5rem; }
.card ul { text-align: left; list-style: none; margin-top: 1.5rem; }
.card li { margin-bottom: 0.7rem; padding-left: 1.8rem; position: relative; font-size: 0.95rem; color: #555; }
.card li::before { content: '→'; position: absolute; left: 0; color: var(--accent); font-weight: bold; }

.clients-strip { display: flex; flex-wrap: wrap; justify-content: center; gap: 50px; align-items: center; margin-top: 1rem; }
.client-logo { max-width: 140px; filter: grayscale(100%); opacity: 0.5; transition: 0.5s; }
.client-logo:hover { filter: grayscale(0%); opacity: 1; transform: scale(1.05); }

footer { background: var(--secondary); color: var(--white); text-align: center; padding: 4rem 5%; border-top: 1px solid rgba(255,255,255,0.1); }
.social-links { margin: 2rem 0; }
.social-links a { color: var(--white); font-size: 2.2rem; margin: 0 20px; transition: 0.3s; text-decoration: none; display: inline-block; }
.social-links a:hover { color: var(--accent); transform: translateY(-5px); }
footer p { font-size: 0.9rem; opacity: 0.7; letter-spacing: 0.5px; }








/* === Servicios: Distribución en Esquinas para Máxima Visibilidad del Fondo === */
.services-hero {
  background-image: 
    linear-gradient(135deg, rgba(0, 45, 95, 0.5) 0%, rgba(0, 86, 179, 0.3) 100%),
    url('assets/bg/services-bg.png');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  border-radius: 30px;
  padding: 5rem 3%;
  margin: 2rem 0;
  box-shadow: 0 20px 50px rgba(0,0,0,0.2);
  min-height: 850px;
  position: relative;
}

.services-hero h2 { 
    color: #fff; 
    text-shadow: 0 2px 10px rgba(0,0,0,0.3);
    margin-bottom: 5rem;
    position: relative;
    z-index: 10;
}

/* Grid especial: distribución en bordes */
.services-hero .grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: auto auto;
  gap: 2rem;
  max-width: 1500px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Posicionamiento estratégico de cada tarjeta */
.services-hero .card:nth-child(1) {
  grid-column: 1;
  grid-row: 1;
  justify-self: start;
}

.services-hero .card:nth-child(2) {
  grid-column: 2;
  grid-row: 1;
  justify-self: center;
  margin-top: 0;
}

.services-hero .card:nth-child(3) {
  grid-column: 3;
  grid-row: 1;
  justify-self: end;
}

.services-hero .card:nth-child(4) {
  grid-column: 1;
  grid-row: 2;
  justify-self: start;
  margin-top: 8rem; /* Espacio vertical para ver el centro */
}

.services-hero .card:nth-child(5) {
  grid-column: 2;
  grid-row: 2;
  justify-self: center;
  margin-top: 8rem;
}

.services-hero .card:nth-child(6) {
  grid-column: 3;
  grid-row: 2;
  justify-self: end;
  margin-top: 8rem;
}

/* Tarjetas de Cristal compactas */
.services-hero .card {
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-top: none;
  border-radius: 18px;
  padding: 1.8rem 1.3rem;
  transition: 0.4s ease;
  box-shadow: 0 8px 20px rgba(0,0,0,0.15);
  max-width: 320px;
  width: 100%;
}

.services-hero .card:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 15px 35px rgba(0,0,0,0.25);
}

.services-hero .card h3 { 
    color: #fff; 
    font-weight: 700;
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

.services-hero .card ul {
  margin-top: 0.8rem;
}

.services-hero .card li { 
    color: rgba(255,255,255,0.92); 
    font-weight: 400;
    font-size: 0.85rem;
    margin-bottom: 0.5rem;
    padding-left: 1.3rem;
}

.services-hero .card li::before { 
    color: var(--accent);
    font-size: 0.9rem;
}

/* Responsive: volver a grid normal en pantallas pequeñas */
@media (max-width: 1200px) {
  .services-hero .grid-3 {
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: auto;
  }

  .services-hero .card:nth-child(1),
  .services-hero .card:nth-child(2),
  .services-hero .card:nth-child(3),
  .services-hero .card:nth-child(4),
  .services-hero .card:nth-child(5),
  .services-hero .card:nth-child(6) {
    grid-column: auto;
    grid-row: auto;
    justify-self: center;
    margin-top: 0;
  }
}

@media (max-width: 900px) {
  .services-hero {
    background-attachment: scroll;
    padding: 4rem 4%;
    min-height: auto;
  }

  .services-hero .grid-3 {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}