This is a resource pack that's mainly for immediate visual effects, although there's a bit more to it than that, the main purpose to it is to make the main hotbar area more appealing, at least for me personally.

A full list of everything in this resource pack is as follows:

Hearts (Animal, hardcore, and normal) all have been changed, as well as their effected variants (IE, if you're chilled, you get blue hearts, and if you're withered, you get black hearts)
Armor was made to look diagonal rather than straight
Hunger was adapted, so that it no longer looked like you were just eating the bone or something
The bubbles were changed so that they were more transparent
The hotbar was changed so that it was cleaner and had a gray transparency rather than a green rough one
The hotbar selector and offhand for left and right have been cleaned up as well ad made purple
The experience bar has a green background, and a purple highlight that shows up when you have experience
Jump bars for mobs have also been changed
This is fully compatible with older versions to my knowledge!! Definitely compatible with 1.20.4+, but also I added extra textures meaning it'll have something to pull from in the older versions!!

Please keep in mind that some textures didn't exist back then, for example there was no "flashing absorption heart" in the old files, so that's a perk of using modern Minecraft.

And the final thing is

I have also changed the main menu panorama to be the trial chambers panorama from 1.21, as I missed and love the asthetic for it personally.

The graphics are as follows (For Hardcore first, then Survival):

Please note that "default" in this context does not mean "untextured," it should mean "these are the hearts you start with no matter what, they're a fallback heart when you don't have any effects." I just used "default" for short. Thank you.

Garnish's Personal GUI