This is an example how to change your post styling via CSS. You can simply add the css
option to your post front-matter field:
scheme-text: "#000"
scheme-link: "#a73300"
scheme-hover: "#ff4e00"
scheme-code: "#a73300"
css: |
body {
background-image: linear-gradient(to bottom, #fff500, #ff8f00);
}
Please note that syntax highlighting may look ugly with the custom background color.