span.fa-stack{ color: black; }
#back_to_top .fa-arrow-up:before {
    color:white !important;
    content: "\f106";
}

/*PARA CAMBIAR EL FONDO DE LA FLECHA QUE SUBE*/ #back_to_top:hover span { background-color: black; }

#back_to_top span{ border-radius: 0px !important; border:0px !important; background: black; }

.q_logo a img {
  image-rendering: auto;
  image-rendering: crisp-edges;
}

.border-topdoble{
 border-top: 1px solid white;
 padding: 0px;
}

.border-top{
 border-top: 1px solid white;
}

.background{
 height: 100%;
}

.border-left{
 border-left: 1px solid white;
}


.header_top_bottom_holder {
    position: relative;
    border-bottom: 1px solid white;
}
.backgroundcontenedor{
 height: 400px;
}