.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(180, 180, 180);
}

.container-principal {
    background-color: rgba(100,100,100, 0.15);
    border-left: 1px solid rgb(220, 220, 220);
    border-right: 1px solid rgb(220, 220, 220)
}

.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(180, 180, 180);
}

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

.container-lateral-claro-l {
    background-color: rgba(128, 128, 128, 0.10);
    border-right: 1px solid rgb(180, 180, 180);
    border-bottom: 1px solid rgb(180, 180, 180)
}

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

.container-lateral-claro-r {
    background-color: rgba(128, 128, 128, 0.10);
    border-left: 1px solid rgb(180, 180, 180)
}