I want it to look like this

So you want the red border and dark buttons ?

here is the default oxwall login

and on the first post to add the names inside the boxs is custom coding youll have to add the placeholder in the html file, i dont think you can do it via the profile questions

the boxes are empty

username / email

the articles are in the box

as on the second picture

I did it to highlight

https://www.w3schools.com/tags/att_placeholder.asp

It can be done with js as well but the input id's for oxwall are random so you cant use the id to trap it. 

Then your options are limited in doing it yourself.

1. you can have someone help you do the coding

2. you can pay someone  to do the coding

3. you can ask a dev to code a plugin for this

4. you can learn HTML, CSS, JS, PHP on your own

5. you can leave it alone and keep things you want to do inside your experience level, and the default ability of oxwall.

Those are your options. 

The way the registration works is that the php file sets the form input attributes and then the html file (smarty) displayes those attributes.  However, many of the inputs are done in an array so its just one question right after the other with limited isolation ability.  In other words it would be a challenge to select just username or just password by simple coding as they are not identified as different when displayed if that makes sense other than input name.

It can be done but it will take special coding to do it.  Someone very good at JS or CSS may be able to do it with some really high end coding to not edit the core files.

The actual code addition is easy

placeholder = 'whatever' for the html file

or for the php file would be

$this->addAttribute("placeholder", "whatever");

the problem is you need to isolate each field with the custom name or all of them will read the same.  You could add a php if statement to the core php file but then again you are changing the core and if you ever update your change is gone.

So the other alternative would be to use js or css to grab the input on the users side and just add the html attribute that way, but i dont know how to do that.

wild west king :D