markdown.css

/* modified 
https://github.com/microsoft/vscode/blob/master/extensions/markdown-language-features/media/markdown.css*/

html,
body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe WPC", "Segoe UI", "Ubuntu", "Droid Sans", sans-serif;
    font-size: 14px;
    padding: 0px;
    line-height: 22px;
    word-wrap: break-word;
    background: #31363F;
}

p {
    color: #9DA5B4;
}

#code-csp-warning {
    position: fixed;
    top: 0;
    right: 0;
    color: white;
    margin: 16px;
    text-align: center;
    font-size: 12px;
    font-family: sans-serif;
    background-color: #444444;
    cursor: pointer;
    padding: 6px;
    box-shadow: 1px 1px 1px rgba(0, 0, 0, .25);
}

#code-csp-warning:hover {
    text-decoration: none;
    background-color: #007acc;
    box-shadow: 2px 2px 2px rgba(0, 0, 0, .25);
}

body.scrollBeyondLastLine {
    margin-bottom: calc(100vh - 22px);
}

body.showEditorSelection .code-line {
    position: relative;
}

body.showEditorSelection .code-active-line:before,
body.showEditorSelection .code-line:hover:before {
    content: "";
    display: block;
    position: absolute;
    top: 0;
    left: -12px;
    height: 100%;
}

body.showEditorSelection li.code-active-line:before,
body.showEditorSelection li.code-line:hover:before {
    left: -30px;
}

.vscode-light.showEditorSelection .code-active-line:before {
    border-left: 3px solid rgba(0, 0, 0, 0.15);
}

.vscode-light.showEditorSelection .code-line:hover:before {
    border-left: 3px solid rgba(0, 0, 0, 0.40);
}

.vscode-light.showEditorSelection .code-line .code-line:hover:before {
    border-left: none;
}

.vscode-dark.showEditorSelection .code-active-line:before {
    border-left: 3px solid rgba(255, 255, 255, 0.4);
}

.vscode-dark.showEditorSelection .code-line:hover:before {
    border-left: 3px solid rgba(255, 255, 255, 0.60);
}

.vscode-dark.showEditorSelection .code-line .code-line:hover:before {
    border-left: none;
}

.vscode-high-contrast.showEditorSelection .code-active-line:before {
    border-left: 3px solid rgba(255, 160, 0, 0.7);
}

.vscode-high-contrast.showEditorSelection .code-line:hover:before {
    border-left: 3px solid rgba(255, 160, 0, 1);
}

.vscode-high-contrast.showEditorSelection .code-line .code-line:hover:before {
    border-left: none;
}

img {
    max-width: 100%;
    max-height: 100%;
}

a,
a:link,
a:visited,
a:hover,
a:active {
    color: white;
    text-decoration: none;
}

a:focus,
input:focus,
select:focus,
textarea:focus {
    outline: 1px solid -webkit-focus-ring-color;
    outline-offset: -1px;
}

hr {
    border: 0;
    height: 2px;
    border-bottom: 2px solid;
}

h1 {
    padding-bottom: 0.3em;
    line-height: 1.2;
    border-bottom-width: 1px;
    border-bottom-style: solid;
}

h1,
h2,
h3 {
    color: #9DA5B4;
    font-weight: normal;
}

table {
    border-collapse: collapse;
}

table>thead>tr>th {
    text-align: left;
    border-bottom: 1px solid;
}

table>thead>tr>th,
table>thead>tr>td,
table>tbody>tr>th,
table>tbody>tr>td {
    padding: 5px 10px;
}

table>tbody>tr+tr>td {
    border-top: 1px solid;
}

code {
    font-family: Menlo, Monaco, Consolas, "Droid Sans Mono", "Courier New", monospace, "Droid Sans Fallback";
    font-size: 1em;
    line-height: 1.357em;
    background-color: #1B1D23;
}

body.wordWrap pre {
    white-space: pre-wrap;
}

.hljs>code>div {
    /* not trivial to discover */
    background-color: 1B1D23;
    color: white;
}

.hljs,
.hljs {
    display: block;
    overflow-x: auto;
    padding: 0.5em;
    color: #f8f8f8;
    background-color: #1B1D23;
}

pre.hljs {
    background-color: #1B1D23;
}

.hljs-github .hljs {
    background: red;
}

pre code {
    color: yellow;
    tab-size: 4;
}


/*
 https://raw.githubusercontent.com/microsoft/vscode/master/extensions/markdown-language-features/media/highlight.css
 */


/** Theming */

.vscode-dark code {
    background-color: #1B1D23;
    color: rgb(64, 182, 10);
}

.vscode-light pre {
    background-color: rgba(10, 10, 10, 0.4);
}

.vscode-dark pre {
    background-color: rgba(10, 10, 10, 0.4);
}

.vscode-high-contrast pre {
    background-color: rgb(0, 0, 0);
}

.vscode-high-contrast h1 {
    border-color: rgb(0, 0, 0);
}

.vscode-light table>thead>tr>th {
    border-color: rgba(0, 0, 0, 0.69);
}

.vscode-dark table>thead>tr>th {
    border-color: rgba(255, 255, 255, 0.69);
}

.vscode-light h1,
.vscode-light hr,
.vscode-light table>tbody>tr+tr>td {
    border-color: rgba(0, 0, 0, 0.18);
}

.vscode-dark h1,
.vscode-dark hr,
.vscode-dark table>tbody>tr+tr>td {
    border-color: rgba(255, 255, 255, 0.18);
}

.hljs-keyword,
.hljs-literal,
.hljs-symbol,
.hljs-name {
    color: #569CD6;
}

.hljs-link {
    color: #569CD6;
    text-decoration: underline;
}

.hljs-built_in,
.hljs-type {
    color: #4EC9B0;
}

.hljs-number,
.hljs-class {
    color: #B8D7A3;
}

.hljs-string,
.hljs-meta-string {
    color: #D69D85;
}

.hljs-regexp,
.hljs-template-tag {
    color: #9A5334;
}

.hljs-subst,
.hljs-function,
.hljs-title,
.hljs-params,
.hljs-formula {
    color: #DCDCDC;
}

.hljs-comment,
.hljs-quote {
    color: #57A64A;
    font-style: italic;
}

.hljs-doctag {
    color: #608B4E;
}

.hljs-meta,
.hljs-meta-keyword,
.hljs-tag {
    color: #9B9B9B;
}

.hljs-variable,
.hljs-template-variable {
    color: #BD63C5;
}

.hljs-attr,
.hljs-attribute,
.hljs-builtin-name {
    color: #9CDCFE;
}

.hljs-section {
    color: gold;
}

.hljs-emphasis {
    font-style: italic;
}

.hljs-strong {
    font-weight: bold;
}

.hljs-code {
    font-family: 'Monospace';
    background-color: #31363F;
}

.hljs-bullet,
.hljs-selector-tag,
.hljs-selector-id,
.hljs-selector-class,
.hljs-selector-attr,
.hljs-selector-pseudo {
    color: #D7BA7D;
}

.hljs-addition {
    background-color: rgba(155, 185, 85, 0.2);
    color: rgb(155, 185, 85);
    display: inline-block;
    width: 100%;
}

.hljs-deletion {
    background: rgba(255, 0, 0, 0.2);
    color: rgb(255, 0, 0);
    display: inline-block;
    width: 100%;
}

.vscode-light .hljs-function,
.vscode-light .hljs-params,
.vscode-light .hljs-number,
.vscode-light .hljs-class {
    color: inherit;
}

.vscode-light .hljs-comment,
.vscode-light .hljs-quote,
.vscode-light .hljs-number,
.vscode-light .hljs-class,
.vscode-light .hljs-variable {
    color: #008000;
}

.vscode-light .hljs-keyword,
.vscode-light .hljs-selector-tag,
.vscode-light .hljs-name,
.vscode-light .hljs-tag {
    color: #00f;
}

.vscode-light .hljs-built_in,
.vscode-light .hljs-builtin-name {
    color: #007acc;
}

.vscode-light .hljs-string,
.vscode-light .hljs-section,
.vscode-light .hljs-attribute,
.vscode-light .hljs-literal,
.vscode-light .hljs-template-tag,
.vscode-light .hljs-template-variable,
.vscode-light .hljs-type {
    color: #a31515;
}

.vscode-light .hljs-selector-attr,
.vscode-light .hljs-selector-pseudo,
.vscode-light .hljs-meta,
.vscode-light .hljs-meta-keyword {
    color: #2b91af;
}

.vscode-light .hljs-title,
.vscode-light .hljs-doctag {
    color: #808080;
}

.vscode-light .hljs-attr {
    color: #f00;
}

.vscode-light .hljs-symbol,
.vscode-light .hljs-bullet,
.vscode-light .hljs-link {
    color: #00b0e8;
}

.vscode-light .hljs-emphasis {
    font-style: italic;
}

.vscode-light .hljs-strong {
    font-weight: bold;
}

blockquote {
    color: #333333 !important;
    position: relative;
    box-shadow: 0px 0px 1px rgba(0, 0, 0, 0.2);
    background-color: #fcfcfc;
    padding: 20px !important;
    margin-top: 15px !important;
    margin-bottom: 15px !important;
    border-left: 0 !important;
}

blockquote p {
    margin: 0 !important;
    margin-bottom: 5px !important;
    margin-top: 5px !important;
    padding-left: 5px !important;
}

blockquote li {
    margin-top: 15px;
}

blockquote::before {
    display: block;
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
}

blockquote::before {
    background-color: steelblue;
}

blockquote note::after,
blockquote tip::after,
blockquote important::after,
blockquote warn::after,
blockquote custom::after {
    display: block;
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
}

blockquote important::before {
    content: var(--title, "IMPORTANT");
    color: var(--color, var(--important));
}

blockquote important::after {
    background-color: var(--color, var(--important));
}