github-markdown-css/github-markdown-htllm.css

.markdown-body a:before {
    content: '[';
}
.markdown-body a:after {
    content: '](' attr(href) ')';
}
 
.markdown-body strong:before,
.markdown-body strong:after {
    content: '**';
}

.markdown-body h1 {
    border-bottom: 0;
}
.markdown-body h1:before {
    content: '#\00a0';
    color: #666666;
}

.markdown-body h2 {
    border-bottom: 0;
}
.markdown-body h2:before {
    content: '##\00a0';
    color: #666666;
}
 
.markdown-body h3:before {
    content: '###\00a0';
    color: #666666;
}
 
.markdown-body h4:before {
    content: '####\00a0';
    color: #666666;
}
.markdown-body h4:after {
    content: '\00a0####';
    color: #666666;
}
 
.markdown-body h5:before {
    content: '#####\00a0';
    color: #666666;
}
.markdown-body h5:after {
    content: '\00a0#####';
    color: #666666;
}
 
.markdown-body h6:before {
    content: '######\00a0';
    color: #999999;
}
.markdown-body h6:after {
    content: '\00a0######';
    color: #999999;
}

/*.markdown-body ul {
    padding-left: .75em;
    list-style-type: none;
}
.markdown-body ul li:before {
    content: '\2217';
    padding-right: .75em;
}*/

.markdown-body code:before {
    content: '\00a0`';
    vertical-align: text-top;
}
.markdown-body code:after {
    content: '`\00a0';
    vertical-align: text-top;
}

.markdown-body u {
    text-decoration: none;
    padding-bottom: .1em;
    border-bottom: .1em solid;
}
.markdown-body u:before,
.markdown-body u:after {
    content: '_';
}

.markdown-body em:before,
.markdown-body em:after {
    content: '/';
}