.program {
    overflow: hidden;
    padding: 4px;
    margin-top: 1.5em;
}

.compile {
    clear: both;
    padding: .5em 0;
    text-align: center;
}

textarea { 
    width: 49%;
    height: 150px;
    float: left;
}

.output {
    background-color: #595959;
    color: white;
    width: 49%;
    height: 150px;
    float: right;
    overflow: auto;
}

.output pre {
    margin: .5em 1em;
    color: white;
}