.container {
    max-width: 840px;
}

.footer {
    padding: 30px 0;
}

pre {
    display: block;
    font-size: 13px;
    line-height: 1.5;
    color: #333;
    word-break: break-all;
    word-wrap: break-word;
    background-color: #f5f5f5;
    border: 1px solid #ccc;
    border-radius: 4px;
    overflow: auto;
}

code {
    padding: 2px 4px;
    font-size: 90%;
    color: #c7254e;
    background-color: #f9f2f4;
    border-radius: 3px;
}

.image-set {
    font-size: 0px;
    margin-left: -5px;
    margin-right: -5px;
}

.image-set img {
    display: block;
}

.image-set a {
    display: inline-block;
    margin-left: 5px;
    margin-right: 5px;
    padding: 2px;
    border: 1px solid #ddd;
    transition: border-color .3s ease;
}

.image-set a:hover {
    border-color: #aaa;
}


/* prettify style */

pre ul,
pre ol {
    padding: 0;
}

.com {
    color: #93a1a1;
}

.lit {
    color: #195f91;
}

.pun,
.opn,
.clo {
    color: #93a1a1;
}

.fun {
    color: #dc322f;
}

.str,
.atv {
    color: #D14;
}

.kwd,
.tag {
    color: #1e347b;
}

.typ,
.atn,
.dec,
.var {
    color: teal;
}

.pln {
    color: #48484c;
}

.prettyprint {
    padding: 10px;
    background-color: #f7f7f9;
    border: 1px solid #e1e1e8;
}