/* Base */
body.bg-site{
  position: relative;
  min-height: 100vh;
  background: #020617; /* fallback */
}

/* Capa de fondo como elemento real */
body.bg-site::before{
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;

  background-image:
    linear-gradient(to bottom, rgba(2,6,23,0.80), rgba(0,0,0,0.82)),
    url("../assets/bg-catalogo.png");

  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;

  /* fuerza render m¨¢s estable en m¨®viles */
  transform: translateZ(0);
  will-change: transform;
}

/* M¨®vil: mejor encuadre y m¨¢s contraste */
@media (max-width: 768px){
  body.bg-site::before{
    background-position: top center;

    /* si quieres un poquito m¨¢s claro en m¨®vil baja estos valores */
    background-image:
      linear-gradient(to bottom, rgba(2,6,23,0.86), rgba(0,0,0,0.88)),
      url("../assets/bg-catalogo.png");
  }
}