A decoupled Input system from Unity / C#

Input.cs

using System;
using UnityEngine;

public class Input : MonoBehaviour
{
    public float Horizontal { get; private set; }
    public float Vertical { get; private set; }
    public bool FireWeapons { get; private set; }
    
    public event Action OnFire = delegate { };
    
    private void Update()
    {
        Horizontal = Input.GetAxis("Horizontal");
        Vertical = Input.GetAxis("Vertical");
        FireWeapons = Input.GetButtonDown("Fire1");
        if (FireWeapons)
        {
            OnFire();
        }
    }
}