.hero {
  background: url('../img/fondo-encabezado.jpg') center/cover no-repeat;
  min-height: 80vh;
  display: flex;
  align-items: center;
  position: relative;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.5);
}

.hero .hero-grid {
  position: relative;
  z-index: 1;
  backdrop-filter: blur(2px);
}