div.prompt {
    display: none;
}

div.input {
    border: none;
    background-color: none;
}

div.input * {
    background-color: none;
}

/* set a max-width for horizontal fluid layout and make it centered */
.body-content {
    margin-right: auto;
    margin-left: auto;
    max-width: 950px;
    /* or 750px */
}

div.output_subarea {
    /* Widens image-containing divs so that image is full body width */
    max-width: 100%;
}