html {
    box-sizing: border-box;
}

*, *:before, *:after {
    box-sizing: inherit;
}

body {
    font-size: 14px;
    font-family: Helvetica Neue, Helvetica, Arial, sans-serif;
    color: #333;
    background-color: #EEE;
    margin: 0;
    padding: 0;
}

#main {
    width: 98%;
    max-width: 800px;
    margin: 0 auto;
    margin-bottom: 1em;
    padding: 0 1%;
    background-color: #FFF;
    overflow: auto;
}

#main > div {
    margin-bottom: 1em;
}

#intro-text {
    font-size: 1.1em;
}

.io-label {
    padding: 0 0.25em;
    line-height: 1.5;
    font-weight: bold;
    font-size: 1.25em;
    border-top: 3px solid #333;
    border-bottom: 1px dotted #333;
    margin-top: 0.5em;
    margin-bottom: 0.25em;
}

.sublabel {
    font-size: 0.75em;
    padding-left: 0.5em;
    color: #999;
    font-weight: normal;
}

.inner {
    padding: 0.5em;
}

.inner.clipped {
    height: 13em;
    overflow-y: scroll;
    border-bottom: 1px solid #999;
}

#input .inner {
    opacity: 0.33;
}

#input .inner:focus {
    opacity: 1;
}

#input .inner {
    background-color: #EEE;
}

textarea {
    border: none;
}

.preview-container {
    width: 300px;
    box-sizing: content-box;
    background: repeating-linear-gradient(
        45deg,
        #EEE,
        #EEE 5px,
        #CCC 5px,
        #CCC 10px
    );
    position: relative;
}

#output-preview:hover .preview-container {
    border-right: 3px solid rgba(238, 51, 34, 0.75);
}

#output-preview:hover .preview-container::after { 
    content: attr(data-width) "px";
    position: absolute;
    right: 0;
    top: 0;
    background-color: papayaWhip;
    padding: 0.25em;
    opacity: 0.75;
}

#output-raw .inner {
    width: 100%;
    height: 7em;
    background-color: #EEE;
}