body {
    padding: 0px;
    margin: 0px;
}

a {
    color: #AACCAA;
}

#div-header {
    background-color: #CCAAAA;
    height: 10%;
}
#div-main {
    position: absolute;
    background-color: #5500FF;
    color: #CCAAAA;
    height: 80%;
    width: 100%;
}
#div-footer {
    background-color: lightgreen;
}