After a lot of work and research, I managed to make my Home Assistant setup really stable and gave it a decent, easy-to-use look. The styling is heavily customized through CSS using card_modder, and the theme I use has little to nothing to do with the final look. Some custom components have been modified as well to serve my needs in terms of style. I am sharing my lovelace.yaml file for reference. You can download it here: drive.google.com. I want to thank the creators and the whole Home Assistant community for all the help they share. Without that, I would have never managed it. I am really happy with how everything turned out and I hope this helps someone else too. Thanks again to everyone who contributed to making this possible!