.ST-backgrounds {
    display: block !important;
}
    .ST-backgrounds img {
    position: fixed;
    top: 0px;
    left: 0px;
    height: auto;
    min-height: 100%;
    min-width: 1024px;
    width: 100%;
    opacity: 0.2;
    filter: Alpha(opacity=60);
}

.border-b {
    border-bottom: 1px solid rgb(200, 200, 200);
}

.container-principal {
    background-color: rgba(100,100,100, 0.15); 
}

.container-pie {
    background-color: rgb(70,70,70);
    color: rgb(220,220,220);
    border-top: 1px solid black;
}

.container-cabecera {
    background-color: rgba(128, 128, 128, 0.30);
    border-bottom: 1px solid rgb(180, 180, 180);
}

.container-cabecera-claro {
    background-color: rgba(128, 128, 128, 0.10);
    border-bottom: 1px solid rgb(200, 200, 200);
}

.container-lateral-l {
    background-color: rgba(128, 128, 128, 0.30);
    border-right: 1px solid rgb(170, 170, 170);
}

.container-lateral-claro-l {
    background-color: rgba(128, 128, 128, 0.10);
    border-right: 1px solid rgb(200, 200, 200);
}

.container-lateral-r {
    background-color: rgba(128, 128, 128, 0.30);
    border-left: 1px solid rgb(170, 170, 170)
}

.container-lateral-claro-r {
    background-color: rgba(128, 128, 128, 0.10);
    border-left: 1px solid rgb(200, 200, 200)
}