hr {
    display: block !important;
    margin: 50px auto;
}

code {
    color: #c7254e;
    background-color: #f9f2f4;
}

pre {
    display: block;
    padding: 9.5px;
    margin: 0 0 10px;
    font-size: 13px;
    line-height: 1.42857143;
    color: #333;
    word-break: break-all;
    word-wrap: break-word;
    background-color: #f5f5f5;
    border: 1px solid #ccc;
    border-radius: 4px;
}
pre code {
    color: #333;
    background-color: transparent;
}

.note {
    position: relative;
    padding-top: 12px;
    padding-bottom: 12px;
    padding-left: 15px;
    margin: 12px auto;
}
.note > p {
    margin-bottom: 0;
}
.note:before {
    content: '';
    width: 3px;
    height: 100%;
    background-color: #f5f5f5;
    position: absolute;
    top: 0;
    left: 0;
}