Nested accordion

Hi,

Wondering if someone can help me?

I have a spoiler with nested spoilers, all wrapped up in an accordion. I am using a custom class for the first spoiler (Code below). However I want to change the look of the nested spoliers, but not sure how. Can someone please tell me what I need to add in order to do this?

Thanks

<style>
.su-spoiler.my-custom-spoiler {}
.su-spoiler.my-custom-spoiler .su-spoiler-title { background-color: #0172FE; color: #FFFFFF; font-weight: normal; }
.su-spoiler.my-custom-spoiler .su-spoiler-title .su-spoiler-icon,
.su-spoiler.su-spoiler-closed.my-custom-spoiler .su-spoiler-title .su-spoiler-icon {
left: 3px;
background-color: #fff;
}
.su-spoiler.my-custom-spoiler .su-spoiler-content { background-color: #D4E0FF }
</style>

https://www.ads-software.com/plugins/shortcodes-ultimate/