are you asking how to make the links page transparent?

if so, you would need to delete bg-faded (which is the grey/muted background)!
<div class="bg-faded p-3">

and then, for the summaries, add background:rgba(0,0,0,0.6); in the style tag!
<div class="card border-0 rounded-0 p-3 text-muted" style="max-height:140px;overflow:auto; background:rgba(0,0,0,0.6);">

hope this helps!