local CoreGui = game:GetService("CoreGui")

local existingGui = CoreGui:FindFirstChild("FullbrightGUI")
if existingGui then
	existingGui:Destroy()
end

local Lighting = game:GetService("Lighting")

local originalSettings = {
	Brightness = Lighting.Brightness,
	ClockTime = Lighting.ClockTime,
	FogEnd = Lighting.FogEnd,
	GlobalShadows = Lighting.GlobalShadows,
	Ambient = Lighting.Ambient
}

local fullbrightOn = false

local function applyFullbright()
	Lighting.Brightness = 10
	Lighting.ClockTime = 12
	Lighting.FogEnd = 100000
	Lighting.GlobalShadows = false
	Lighting.Ambient = Color3.new(1, 1, 1)
end

local function restoreLighting()
	for prop, value in pairs(originalSettings) do
		Lighting[prop] = value
	end
end

local UserInputService = game:GetService("UserInputService")

local ScreenGui = Instance.new("ScreenGui", CoreGui)
ScreenGui.Name = "FullbrightGUI"

local Frame = Instance.new("Frame", ScreenGui)
Frame.Size = UDim2.new(0, 200, 0, 80)
Frame.Position = UDim2.new(0.5, -100, 0.1, 0)
Frame.BackgroundColor3 = Color3.fromRGB(25, 25, 25)
Frame.BorderSizePixel = 0
Frame.AnchorPoint = Vector2.new(0.5, 0)
Frame.BackgroundTransparency = 0.1

local UICorner = Instance.new("UICorner", Frame)
UICorner.CornerRadius = UDim.new(0, 10)

local Button = Instance.new("TextButton", Frame)
Button.Size = UDim2.new(1, -20, 1, -20)
Button.Position = UDim2.new(0, 10, 0, 10)
Button.Text = "Enable Fullbright"
Button.BackgroundColor3 = Color3.fromRGB(40, 40, 40)
Button.TextColor3 = Color3.new(1, 1, 1)
Button.TextScaled = true
Button.BorderSizePixel = 0

local ButtonCorner = Instance.new("UICorner", Button)
ButtonCorner.CornerRadius = UDim.new(0, 6)

Button.MouseButton1Click:Connect(function()
	fullbrightOn = not fullbrightOn
	if fullbrightOn then
		applyFullbright()
		Button.Text = "Disable Fullbright"
	else
		restoreLighting()
		Button.Text = "Enable Fullbright"
	end
end)

local dragging = false
local dragInput
local dragStart
local startPos

local function update(input)
	local delta = input.Position - dragStart
	Frame.Position = UDim2.new(startPos.X.Scale, startPos.X.Offset + delta.X, startPos.Y.Scale, startPos.Y.Offset + delta.Y)
end

Frame.InputBegan:Connect(function(input)
	if input.UserInputType == Enum.UserInputType.MouseButton1 then
		dragging = true
		dragStart = input.Position
		startPos = Frame.Position

		input.Changed:Connect(function()
			if input.UserInputState == Enum.UserInputState.End then
				dragging = false
			end
		end)
	end
end)

Frame.InputChanged:Connect(function(input)
	if input.UserInputType == Enum.UserInputType.MouseMovement then
		dragInput = input
	end
end)

UserInputService.InputChanged:Connect(function(input)
	if input == dragInput and dragging then
		update(input)
	end
end)