Definitely. You are welcome to use these ideas.
Yeah, in web design (frontend work, css, etc) , the smallest detail/subtlety is as important as the big picture. The smallest details like the particular shade of color, lightness, or radius… or how much padding and margin to use, font-size, font style, etc.
Some coders may poo-poo CSS and styling, but I love it, and enjoy crafting a good looking and functional page as much as coding the business logic/database models behind the scenes.
Think of it this way… The look, design and style of a website is the first thing the viewing public will see! Not the hidden code behind the scenes. People will judge a website/app based on it’s look, their first impressions.