body {
    /*/background-color: rgb(160, 180, 213);  For browsers that do not support gradients */
}

.maindiv {
    margin-left: 0px;
    position: absolute;
    top: 0px; /* Header Height */
    bottom: 0px; /* Footer Height */
    left: 0px;
    width: 100%;
    /*background-image: linear-gradient(rgb(254, 51, 152), mediumvioletred, rgb(110, 22, 66), black, slategrey, rgb(160, 180, 213));*/
    /*color: gold;*/
}
.sectiondiv {
    margin: 0px;
    width: 100%;
    /*background-image: linear-gradient(rgb(254, 51, 152), mediumvioletred, rgb(110, 22, 66), black, slategrey, rgb(160, 180, 213));*/
    /*color: gold;*/
    top: 0px; /* Header Height */
    left: 0px;
}