🎨 CSS Update: new features and utilities

Updated several classes using new features from TailwindCSS 3.4 and re-implemented custom classes into the utilities layer.

🛠️ Changes

Changed w-*/h-* combinations to size-*
Changed 100dvh arbitrary classes to new dvh class
Changed card sizes from width and height to width and aspect ratio
Added text-pretty to modal text
Added grid-center to Tailwind Utilities
Re-implemented preserve-3d, flipped and backface-hidden classes as Tailwind Utilities