HackMD/public/css/markdown.css

/* for markdown-body */

.markdown-body {
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
    padding-top: 40px;
    padding-bottom: 40px;
    max-width: 758px;
	overflow: visible !important;
}
/*fixed style for bootstrap comflict*/

.markdown-body pre {
    border: inherit !important;
}

.markdown-body code {
    color: inherit !important;
}

.markdown-body pre code .wrapper {
    display: -webkit-inline-flex;
    display: -moz-inline-flex;
    display: -ms-inline-flex;
    display: -o-inline-flex;
    display: inline-flex;
}

.markdown-body pre code .gutter {
    float: left;
    overflow: hidden;
    -webkit-user-select: none;
    user-select: none;
}

.markdown-body pre code .gutter.linenumber {
    text-align: right;
    position: relative;
    display: inline-block;
    cursor: default;
    z-index: 4;
    padding: 0 8px 0 0;
    min-width: 20px;
    box-sizing: content-box;
    color: #afafaf !important;
    border-right: 3px solid #6ce26c !important;
}

.markdown-body pre code .gutter.linenumber > span:before {
    content: attr(data-linenumber);
}

.markdown-body pre code .code {
    float: left;
    margin: 0 0 0 16px;
}

.markdown-body .gist .line-numbers {
    border-left: none;
    border-top: none;
    border-bottom: none;
}

.markdown-body .gist .line-data {
    border: none;
}

.markdown-body .gist table {
    border-spacing: 0;
    border-collapse: inherit !important;
}

.markdown-body code[data-gist-id] {
    background: none;
    padding: 0;
}

.markdown-body code[data-gist-id]:before {
    content: ''
}

.markdown-body code[data-gist-id]:after {
    content: ''
}

/*fixed style for rtl in pre and code*/

.markdown-body[dir='rtl'] pre {
    direction: ltr;
}

.markdown-body[dir='rtl'] code {
    direction: ltr;
    unicode-bidi: embed;
}

.markdown-body .alert > p {
    margin-bottom: 0;
}

.markdown-body pre.flow-chart,
.markdown-body pre.sequence-diagram,
.markdown-body pre.graphviz,
.markdown-body pre.mermaid {
    text-align: center;
    background-color: inherit;
    border-radius: 0;
    white-space: inherit;
}

.markdown-body pre.flow-chart > code,
.markdown-body pre.sequence-diagram > code,
.markdown-body pre.graphviz > code,
.markdown-body pre.mermaid > code {
    text-align: left;
}

.markdown-body pre.flow-chart > svg,
.markdown-body pre.sequence-diagram > svg,
.markdown-body pre.graphviz > svg,
.markdown-body pre.mermaid > svg {
    max-width: 100%;
    height: 100%;
}