Testing GitHub3 css file

github3-testing.css

body {
    color: #333;
    font: 16px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
    padding: 30px;
    margin: 0;
    word-wrap: break-word;
}

body > *:first-child {
    margin-top: 0 !important;
}

body > *:last-child {
    margin-bottom: 0 !important;
}

code,
kbd,
pre,
samp {
    font-family: monospace,monospace;
    font-size: 1em;
}

pre {
    overflow: auto;
    font: 12px Consolas,"Liberation Mono",Menlo,Courier,monospace;
    margin-bottom: 0;
    margin-top: 0;
}

code,tt {
    padding: 0.2em 0;
    margin: 0;
    font-size: 85%;
    background-color: rgba(0,0,0,0.04);
    border-radius: 3px;
}

code:before,
code:after,
tt:before,
tt:after {
    letter-spacing: -0.2em;
    content: "\00a0";
}

code br,
tt br {
    display: none;
}

del code {
    text-decoration: inherit;
}

pre>code {
    padding: 0;
    margin: 0;
    font-size: 100%;
    word-break: normal;
    white-space: pre;
    background: transparent;
    border: 0;
}

pre {
    padding: 16px;
    overflow: auto;
    font-size: 85%;
    line-height: 1.45;
    background-color: #f7f7f7;
    border-radius: 3px;
    word-wrap: normal;
}

pre code,
pre tt {
    display: inline;
    max-width: initial;
    padding: 0;
    margin: 0;
    overflow: initial;
    line-height: inherit;
    word-wrap: normal;
    background-color: transparent;
    border: 0;
}

pre code:before,
pre code:after,
pre tt:before,
pre tt:after {
    content: normal;
}