With the HTML Inline-CSS – Cheat Sheet you have easy help for designing a stage or a bucket in ONevents. There is also a global CSS, but you can also include CSS directly in the HTML file.
<!-- Text und Struktur mit Inline-CSS -->
<div style="color: blue; font-size: 18px;">A div container</div>
<p style="font-weight: bold;">A fat paragraph</p>
<span style="background-color: yellow;">A yellow chip element</span>
<!-- Bilder mit Inline-CSS -->
<img src="bild.jpg"alt="Beschreibung des Bildes"style="width: 300px; border: 1px solidblack;">
<!-- Links mit Inline-CSS -->
<a href="https://www.example.com"style="text-decoration: none; color: green;">A green link to Example.com</a>
<!-- Listen mit Inline-CSS -->
<ul style="list-style-type: square;">
<li>List item 1</li>
<li>List item 2</li>
</ul>
There are of course many more HTML and CSS tags - you can easily find them on the Internet. e.g HERE