--// MODERN FLY UI v5.1 – WORKING

local Players = game:GetService("Players")
local RunService = game:GetService("RunService")
local TweenService = game:GetService("TweenService")
local ContextActionService = game:GetService("ContextActionService")
local Lighting = game:GetService("Lighting")

local player = Players.LocalPlayer
local playerGui = player:WaitForChild("PlayerGui")
local camera = workspace.CurrentCamera

--// STATE
local flying = false
local flySpeed = 80
local verticalSpeed = 60
local bodyGyro, bodyVelocity

--// INPUT
local joyInput = Vector2.new()
local joySmooth = Vector2.new()
local upPressed = false
local downPressed = false

--// CONSTANTS
local JOY_RADIUS = 70
local JOY_SPRING_K = 200
local JOY_DAMPING = 20

--------------------------------------------------------------------
--// 1. CREATE BLUR EFFECTS IN LIGHTING
--------------------------------------------------------------------
local blur = Instance.new("BlurEffect")
blur.Size = 0
blur.Parent = Lighting

local function setBlur(size)
	blur.Size = size
end

--------------------------------------------------------------------
--// 2. FLY BUTTON (GLASS + NEON GLOW)
--------------------------------------------------------------------
local flyGui = Instance.new("ScreenGui")
flyGui.Name = "ModernFlyUI"
flyGui.ResetOnSpawn = false
flyGui.Parent = playerGui

local flyFrame = Instance.new("Frame")
flyFrame.Size = UDim2.new(0, 110, 0, 110)
flyFrame.Position = UDim2.new(0.05, 0, 0.75, 0)
flyFrame.BackgroundTransparency = 0.75
flyFrame.BackgroundColor3 = Color3.fromRGB(20, 20, 30)
flyFrame.Active = true
flyFrame.ClipsDescendants = true
flyFrame.Parent = flyGui

local flyCorner = Instance.new("UICorner")
flyCorner.CornerRadius = UDim.new(1, 0)
flyCorner.Parent = flyFrame

local flyStroke = Instance.new("UIStroke")
flyStroke.Thickness = 2
flyStroke.Color = Color3.fromRGB(0, 200, 255)
flyStroke.Transparency = 0.5
flyStroke.Parent = flyFrame

local flyButton = Instance.new("TextButton")
flyButton.Size = UDim2.new(0, 70, 0, 70)
flyButton.Position = UDim2.new(0.5, -35, 0.5, -35)
flyButton.BackgroundTransparency = 1
flyButton.Text = "FLY"
flyButton.TextColor3 = Color3.fromRGB(0, 200, 255)
flyButton.FontFace = Font.fromEnum(Enum.Font.GothamBold)
flyButton.TextSize = 24
flyButton.Parent = flyFrame

-- Neon Pulse
local function pulseGlow()
	TweenService:Create(flyStroke, TweenInfo.new(1.2, Enum.EasingStyle.Sine, Enum.EasingDirection.InOut, -1, true), {
		Transparency = 0.3
	}):Play()
end
pulseGlow()

-- Drag
local dragTarget = flyFrame.Position
local dragPos = flyFrame.Position
local dragVel = Vector2.new()

local function updateDrag()
	local delta = Vector2.new(dragTarget.X.Offset - dragPos.X.Offset, dragTarget.Y.Offset - dragPos.Y.Offset)
	dragVel = dragVel + delta * 30
	dragVel = dragVel * 0.9
	dragPos = UDim2.new(0, dragPos.X.Offset + dragVel.X, 0, dragPos.Y.Offset + dragVel.Y)
	flyFrame.Position = dragPos
end

local dragging = false
flyFrame.InputBegan:Connect(function(input)
	if input.UserInputType ~= Enum.UserInputType.MouseButton1 and input.UserInputType ~= Enum.UserInputType.Touch then return end
	dragging = true
	dragTarget = flyFrame.Position
	dragVel = Vector2.new()
	TweenService:Create(flyFrame, TweenInfo.new(0.15), {Size = UDim2.new(0, 120, 0, 120)}):Play()
end)

flyFrame.InputChanged:Connect(function(input)
	if not dragging then return end
	local delta = input.Position - Vector2.new(
		input.Position.X - (dragTarget.X.Offset - (flyFrame.Position.X.Offset - dragPos.X.Offset)),
		input.Position.Y - (dragTarget.Y.Offset - (flyFrame.Position.Y.Offset - dragPos.Y.Offset))
	)
	dragTarget = UDim2.new(0, dragTarget.X.Offset + delta.X, 0, dragTarget.Y.Offset + delta.Y)
end)

flyFrame.InputEnded:Connect(function()
	if not dragging then return end
	dragging = false
	TweenService:Create(flyFrame, TweenInfo.new(0.3, Enum.EasingStyle.Back), {Size = UDim2.new(0, 110, 0, 110)}):Play()
end)

RunService.Heartbeat:Connect(updateDrag)

--------------------------------------------------------------------
--// 3. JOYSTICK (GLASS + GLOW)
--------------------------------------------------------------------
local joyGui = Instance.new("ScreenGui")
joyGui.ResetOnSpawn = false
joyGui.Parent = playerGui

local joyBase = Instance.new("Frame")
joyBase.Size = UDim2.new(0, 140, 0, 140)
joyBase.Position = UDim2.new(0, 30, 1, -170)
joyBase.BackgroundTransparency = 0.8
joyBase.BackgroundColor3 = Color3.fromRGB(15, 15, 25)
joyBase.Parent = joyGui

local baseCorner = Instance.new("UICorner")
baseCorner.CornerRadius = UDim.new(1, 0)
baseCorner.Parent = joyBase

local baseStroke = Instance.new("UIStroke")
baseStroke.Thickness = 1.5
baseStroke.Color = Color3.fromRGB(0, 180, 255)
baseStroke.Transparency = 0.7
baseStroke.Parent = joyBase

local joyKnob = Instance.new("Frame")
joyKnob.Size = UDim2.new(0, 60, 0, 60)
joyKnob.Position = UDim2.new(0.5, -30, 0.5, -30)
joyKnob.BackgroundColor3 = Color3.fromRGB(0, 200, 255)
joyKnob.Parent = joyBase

local knobCorner = Instance.new("UICorner")
knobCorner.CornerRadius = UDim.new(1, 0)
knobCorner.Parent = joyKnob

local knobStroke = Instance.new("UIStroke")
knobStroke.Thickness = 3
knobStroke.Color = Color3.fromRGB(0, 255, 255)
knobStroke.Transparency = 0.4
knobStroke.Parent = joyKnob

-- Knob Pulse
spawn(function()
	while wait(1) do
		TweenService:Create(knobStroke, TweenInfo.new(0.8, Enum.EasingStyle.Sine, Enum.EasingDirection.InOut, -1, true), {
			Transparency = 0.2
		}):Play()
	end
end)

local function updateKnob(dir, dist)
	local target = UDim2.new(0.5, dir.X * dist - 30, 0.5, dir.Y * dist - 30)
	joyKnob:TweenPosition(target, Enum.EasingStyle.Quad, Enum.EasingDirection.Out, 0.1, true)
end

-- Joystick Input
local JOY_ACTION = "ModernFlyJoy"
ContextActionService:BindAction(JOY_ACTION, function(_, state, input)
	if state == Enum.UserInputState.Begin then
	elseif state == Enum.UserInputState.Change then
		local center = joyBase.AbsolutePosition + joyBase.AbsoluteSize * 0.5
		local delta = Vector2.new(input.Position.X, input.Position.Y) - center
		local mag = math.min(delta.Magnitude, JOY_RADIUS)
		local dir = if mag > 0 then delta.Unit else Vector2.new()
		joyInput = dir * (mag / JOY_RADIUS)
		updateKnob(dir, mag)
	elseif state == Enum.UserInputState.End or state == Enum.UserInputState.Cancel then
		joyInput = Vector2.new()
		updateKnob(Vector2.new(), 0)
	end
	return Enum.ContextActionResult.Sink
end, false, Enum.UserInputType.Touch)

local function updateHitbox()
	local center = joyBase.AbsolutePosition + joyBase.AbsoluteSize * 0.5
	ContextActionService:SetPosition(JOY_ACTION, UDim2.fromOffset(center.X, center.Y))
	ContextActionService:SetRadius(JOY_ACTION, JOY_RADIUS)
end
joyBase:GetPropertyChangedSignal("AbsoluteSize"):Connect(updateHitbox)
joyBase:GetPropertyChangedSignal("AbsolutePosition"):Connect(updateHitbox)
task.spawn(updateHitbox)

-- Spring
RunService.Heartbeat:Connect(function(dt)
	if joyInput.Magnitude > 0 then
		local f = (joyInput - joySmooth) * JOY_SPRING_K
		local d = -joySmooth * JOY_DAMPING
		joySmooth = joySmooth + (f + d) * dt
	else
		joySmooth = joySmooth:Lerp(Vector2.new(), math.min(1, 15 * dt))
	end
end)

--------------------------------------------------------------------
--// 4. UP/DOWN BUTTONS
--------------------------------------------------------------------
local udGui = Instance.new("ScreenGui")
udGui.ResetOnSpawn = false
udGui.Parent = playerGui

local function makeBtn(pos, icon, color)
	local btn = Instance.new("TextButton")
	btn.Size = UDim2.new(0, 55, 0, 55)
	btn.Position = pos
	btn.BackgroundTransparency = 0.75
	btn.BackgroundColor3 = Color3.fromRGB(20, 20, 30)
	btn.Text = icon
	btn.TextColor3 = color
	btn.FontFace = Font.fromEnum(Enum.Font.GothamBold)
	btn.TextSize = 28
	btn.Parent = udGui

	local corner = Instance.new("UICorner")
	corner.CornerRadius = UDim.new(1, 0)
	corner.Parent = btn

	local stroke = Instance.new("UIStroke")
	stroke.Thickness = 1.5
	stroke.Color = color
	stroke.Transparency = 0.6
	stroke.Parent = btn

	return btn
end

local upBtn = makeBtn(UDim2.new(1, -75, 1, -165), "UP", Color3.fromRGB(0, 220, 120))
local downBtn = makeBtn(UDim2.new(1, -75, 1, -100), "DOWN", Color3.fromRGB(255, 100, 120))

local function press(btn, down)
	TweenService:Create(btn, TweenInfo.new(0.12), {
		Size = down and UDim2.new(0, 50, 0, 50) or UDim2.new(0, 55, 0, 55),
		BackgroundTransparency = down and 0.6 or 0.75
	}):Play()
end

upBtn.MouseButton1Down:Connect(function() upPressed = true; press(upBtn, true) end)
upBtn.MouseButton1Up:Connect(function() upPressed = false; press(upBtn, false) end)
downBtn.MouseButton1Down:Connect(function() downPressed = true; press(downBtn, true) end)
downBtn.MouseButton1Up:Connect(function() downPressed = false; press(downBtn, false) end)

--------------------------------------------------------------------
--// 5. FLY SYSTEM
--------------------------------------------------------------------
local function startFlying()
	if flying then return end
	flying = true
	TweenService:Create(flyButton, TweenInfo.new(0.2), {TextColor3 = Color3.fromRGB(0, 255, 100)}):Play()
	TweenService:Create(flyStroke, TweenInfo.new(0.2), {Color = Color3.fromRGB(0, 255, 100)}):Play()
	setBlur(8)

	local char = player.Character or player.CharacterAdded:Wait()
	local root = char:WaitForChild("HumanoidRootPart")
	local hum = char:WaitForChild("Humanoid")
	hum.PlatformStand = true

	bodyGyro = Instance.new("BodyGyro")
	bodyGyro.P = 20000
	bodyGyro.MaxTorque = Vector3.new(1e5, 1e5, 1e5)
	bodyGyro.CFrame = root.CFrame
	bodyGyro.Parent = root

	bodyVelocity = Instance.new("BodyVelocity")
	bodyVelocity.MaxForce = Vector3.new(1e5, 1e5, 1e5)
	bodyVelocity.Velocity = Vector3.zero
	bodyVelocity.Parent = root
end

local function stopFlying()
	if not flying then return end
	flying = false
	TweenService:Create(flyButton, TweenInfo.new(0.2), {TextColor3 = Color3.fromRGB(0, 200, 255)}):Play()
	TweenService:Create(flyStroke, TweenInfo.new(0.2), {Color = Color3.fromRGB(0, 200, 255)}):Play()
	setBlur(0)

	if bodyGyro then bodyGyro:Destroy() end
	if bodyVelocity then bodyVelocity:Destroy() end
	bodyGyro, bodyVelocity = nil, nil

	local hum = player.Character and player.Character:FindFirstChild("Humanoid")
	if hum then hum.PlatformStand = false end
end

flyButton.MouseButton1Click:Connect(function()
	if flying then stopFlying() else startFlying() end
end)

--------------------------------------------------------------------
--// 6. MOVEMENT
--------------------------------------------------------------------
RunService.Heartbeat:Connect(function()
	if not flying or not player.Character then return end
	local root = player.Character:FindFirstChild("HumanoidRootPart")
	if not root or not bodyVelocity then return end

	local move = Vector3.new(joySmooth.X, 0, -joySmooth.Y)
	if move.Magnitude > 0.05 then
		local look = camera.CFrame.LookVector
		local right = camera.CFrame.RightVector
		local world = (look * move.Z + right * move.X) * flySpeed
		bodyVelocity.Velocity = Vector3.new(world.X, bodyVelocity.Velocity.Y, world.Z)
	else
		bodyVelocity.Velocity = Vector3.new(0, bodyVelocity.Velocity.Y, 0)
	end

	local vert = 0
	if upPressed then vert += verticalSpeed end
	if downPressed then vert -= verticalSpeed end
	if vert == 0 and math.abs(bodyVelocity.Velocity.Y) < 2 then
		bodyVelocity.Velocity = Vector3.new(bodyVelocity.Velocity.X, 0.4, bodyVelocity.Velocity.Z)
	else
		bodyVelocity.Velocity = Vector3.new(bodyVelocity.Velocity.X, vert, bodyVelocity.Velocity.Z)
	end

	bodyGyro.CFrame = camera.CFrame
end)

--------------------------------------------------------------------
--// 7. CLEANUP
--------------------------------------------------------------------
player.CharacterAdded:Connect(function()
	if flying then task.spawn(stopFlying) end
end)

-- Optional: Remove blur on leave
Players.PlayerRemoving:Connect(function(p)
	if p == player then
		blur:Destroy()
	end
end)