style: improve ui

[d-sanderson]

use neumorphism to improve ui

example:

source: https://uxdesign.cc/neumorphism-in-user-interfaces-b47cef3bf3a6
styles generator: https://neumorphism.io/#55b9f3

[d-sanderson]

resource: https://css-tricks.com/neumorphism-and-css/