You can include a custom css file by putting its full path on the data-css element of the script statement e.g.

<script id="youstakembed" type="text/javascript" src= "https://www.youstak.com/stak/youstakembed/embed.js" data-css="http://www.mysite.com/mymarketplace.css" >

Classes that you may wish to style include:

• ys-text : standard text
• ys-button : standard button
• ys-panel : standard panel
• ys-tile : the item results tile used to display results.
• ys-list : the list of features, locations, review questions used in the search dialogue
• ys-detailitem : the individual item display
• ys-tilescore : the star rating shown on a result tile.
• ys-label : standard label