document, body {
    margin: 0;
    padding: 0;
    background-color: lightblue;
    font-family: Arial, "Helvetica Neue", Helvetica, sans-serif; 
    font-size: 10px;
}

canvas {
    position: absolute;
    margin: 0;
    padding: 0;
}

#background {
    z-index: -55;
}

#leftform {
    position: absolute;
    left: 0px;
    background-color: lightblue;
    width: 210px;
    padding: 10px;
    z-index: 65;
    top: 0%;
    bottom: 0%;
}

#rightform {
    position: absolute;
    right: 0px;
    background-color: lightblue;
    width: 210px;
    padding: 10px;
    z-index: 65;
    top: 0%;
    bottom: 0%;
}

.formula{
    font-weight: bolder;
    font-size: 13px;
    display: block;
    text-align: center;
}

.slider {
    width: 155px;
    margin: 0;
    padding: 0;
    position: relative;
    margin-bottom: 5px;
    margin-top: 10px;
    bottom: -4px;
}

.varlabel, .textinput {
    margin: 0;
    padding: 0;
    display: inline-block;
}

.varlabel {
    margin-left: 30px;
}

#colored, #black, #white, #lighten, #difference, #screen {
    display: inline-block;
}

button {
    position: relative;
    z-index: 75
}

#bkg label {
    display: block;
    margin-bottom: 0px;
}