lualocal UIS = game:GetService("UserInputService")
local RunService = game:GetService("RunService")
local Players = game:GetService("Players")

local player = Players.LocalPlayer
local character = player.Character or player.CharacterAdded:Wait()
local humanoid = character:WaitForChild("Humanoid")
local root = character:WaitForChild("HumanoidRootPart")

local flying = false
local speed = 60

local lv
local ao
local attachment

local function startFlying()
	flying = true
	
	-- Create attachment for constraints if it doesn't exist
	attachment = root:FindFirstChild("FlightAttachment")
	if not attachment then
		attachment = Instance.new("Attachment")
		attachment.Name = "FlightAttachment"
		attachment.Parent = root
	end

	-- Modern LinearVelocity
	lv = Instance.new("LinearVelocity")
	lv.VelocityConstraintMode = Enum.VelocityConstraintMode.Vector
	lv.MaxForce = math.huge
	lv.VectorVelocity = Vector3.zero
	lv.Attachment0 = attachment
	lv.Parent = root

	-- Modern AlignOrientation
	ao = Instance.new("AlignOrientation")
	ao.Mode = Enum.AlignOrientationMode.OneAttachment
	ao.RigidityEnabled = true
	ao.Attachment0 = attachment
	ao.Parent = root

	humanoid.PlatformStand = true
end

local function stopFlying()
	flying = false

	if lv then lv:Destroy() end
	if ao then ao:Destroy() end
	if attachment then attachment:Destroy() end

	humanoid.PlatformStand = false
end

UIS.InputBegan:Connect(function(input, gameProcessed)
	if gameProcessed then return end

	if input.KeyCode == Enum.KeyCode.F then
		if flying then
			stopFlying()
		else
			startFlying()
		end
	end
end)

RunService.RenderStepped:Connect(function()
	if not flying then return end

	local cam = workspace.CurrentCamera
	local moveDirection = Vector3.zero

	if UIS:IsKeyDown(Enum.KeyCode.W) then
		moveDirection += cam.CFrame.LookVector
	end
	if UIS:IsKeyDown(Enum.KeyCode.S) then
		moveDirection -= cam.CFrame.LookVector
	end
	if UIS:IsKeyDown(Enum.KeyCode.A) then
		moveDirection -= cam.CFrame.RightVector
	end
	if UIS:IsKeyDown(Enum.KeyCode.D) then
		moveDirection += cam.CFrame.RightVector
	end
	if UIS:IsKeyDown(Enum.KeyCode.Space) then
		moveDirection += Vector3.new(0, 1, 0)
	end
	if UIS:IsKeyDown(Enum.KeyCode.LeftControl) then
		moveDirection -= Vector3.new(0, 1, 0)
	end

	if moveDirection.Magnitude > 0 then
		lv.VectorVelocity = moveDirection.Unit * speed
	else
		lv.VectorVelocity = Vector3.zero
	end

	ao.CFrame = cam.CFrame
end)

player.CharacterAdded:Connect(function(char)
	character = char
	humanoid = char:WaitForChild("Humanoid")
	root = char:WaitForChild("HumanoidRootPart")
	stopFlying()
end)