Request feedback on Random Quote Machine

Code Feedback
1

hi
please review my Random Quote Machine Project.
I have used html,css,bootstrap and Javascript.

please click on below link:
https://codepen.io/naga-lakshmi/full/ExxVPWa

2

I would suggest adding an overlay to the background. The white text is very difficult to read where the tree line breaks and the sky starts to show. I would also make sure the buttons change the cursor so users know they are clickable.