Added various css things

- Designed login and register buttons
- removed some unnecessary css things
- changed some small things in the design

frontend/src/components/Button.js

@@ -2,7 +2,6 @@ import React from "react";
 import "./Button.css";
 import { Link } from "react-router-dom";
 
-const newTo = (props) => "#";
 
 const STYLES = ["btn--primary", "btn--outline"];