.dark-layer {
position: absolute;
z-index: 88;
background-color: #000;
}

#dark-layer-top {
width: 100%;
height: 215px;
top: 0px;
left: 0px;
}

#dark-layer-left {
width: 255px;
height: 100%;
top: 215px;
left: 0px;
}

#dark-layer-right {
width: 100%;
height: 100%;
top: 215px;
left: 780px;
}