Audio player / remove play "line"

https://rabbit-orchid-h7nk.squarespace.com/ pw is squarespace

Hi, my site has an audio play button, and I wanted to see if there's any way to remove the "line" that increases in thickness as the music plays? So just to have a play / pause button, but not this line.

I also made my audio button sticky on the bottom right corner, but it only applies to the section. Is there a way to make it stick across the whole page?

I used the following code (but it only seems to apply to the section):

@media screen and (min-width:768px) {
.fe-block.fe-block-yui_3_17_2_1_1679036289623_7770 {
    position: sticky;
    top: 90% !important;
    position: -webkit-sticky;
    z-index: 99999;
}
}
 

Use this code