--// Modern Roblox GUI: Full Letter 🅰 Replacer (Dark Mode + Draggable)
local player = game.Players.LocalPlayer
local playerGui = player:WaitForChild("PlayerGui")

-- Create GUI
local ScreenGui = Instance.new("ScreenGui")
ScreenGui.Name = "LetterReplacerGUI"
ScreenGui.ResetOnSpawn = false
ScreenGui.Parent = playerGui

-- Main Frame
local Frame = Instance.new("Frame")
Frame.Size = UDim2.new(0, 320, 0, 120)
Frame.Position = UDim2.new(0.5, -160, 0.5, -80)
Frame.BackgroundColor3 = Color3.fromRGB(25, 25, 30)
Frame.BorderSizePixel = 0
Frame.Active = true
Frame.Draggable = true
Frame.Parent = ScreenGui

local UICorner = Instance.new("UICorner", Frame)
UICorner.CornerRadius = UDim.new(0, 12)

-- Title Bar
local TitleBar = Instance.new("Frame")
TitleBar.Size = UDim2.new(1, 0, 0, 30)
TitleBar.BackgroundColor3 = Color3.fromRGB(35, 35, 40)
TitleBar.BorderSizePixel = 0
TitleBar.Parent = Frame

local TitleCorner = Instance.new("UICorner", TitleBar)
TitleCorner.CornerRadius = UDim.new(0, 12)

local Title = Instance.new("TextLabel")
Title.Parent = TitleBar
Title.Size = UDim2.new(1, -20, 1, 0)
Title.Position = UDim2.new(0, 10, 0, 0)
Title.BackgroundTransparency = 1
Title.Text = "🅲🅷🅰🆃 🅱🆈🅿🅰🆂🆂🅴🆁"
Title.Font = Enum.Font.GothamBold
Title.TextColor3 = Color3.fromRGB(255, 255, 255)
Title.TextSize = 20
Title.TextXAlignment = Enum.TextXAlignment.Left

-- TextBox
local TextBox = Instance.new("TextBox")
TextBox.Size = UDim2.new(1, -20, 0, 30)
TextBox.Position = UDim2.new(0, 10, 0, 40)
TextBox.PlaceholderText = "Type your message..."
TextBox.Text = ""
TextBox.Font = Enum.Font.Gotham
TextBox.TextSize = 18
TextBox.TextColor3 = Color3.fromRGB(255, 255, 255)
TextBox.BackgroundColor3 = Color3.fromRGB(45, 45, 50)
TextBox.BorderSizePixel = 0
TextBox.Parent = Frame

local tbCorner = Instance.new("UICorner", TextBox)
tbCorner.CornerRadius = UDim.new(0, 8)

-- Send Button
local SendButton = Instance.new("TextButton")
SendButton.Size = UDim2.new(1, -20, 0, 30)
SendButton.Position = UDim2.new(0, 10, 0, 80)
SendButton.Text = "Send"
SendButton.Font = Enum.Font.GothamBold
SendButton.TextSize = 20
SendButton.TextColor3 = Color3.fromRGB(255, 255, 255)
SendButton.BackgroundColor3 = Color3.fromRGB(0, 170, 255)
SendButton.BorderSizePixel = 0
SendButton.Parent = Frame

local btnCorner = Instance.new("UICorner", SendButton)
btnCorner.CornerRadius = UDim.new(0, 8)

-- Hover effects
SendButton.MouseEnter:Connect(function()
	SendButton.BackgroundColor3 = Color3.fromRGB(0, 200, 255)
end)
SendButton.MouseLeave:Connect(function()
	SendButton.BackgroundColor3 = Color3.fromRGB(0, 170, 255)
end)

-- Smooth Dragging
local UserInputService = game:GetService("UserInputService")
local dragging, dragInput, dragStart, 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

TitleBar.InputBegan:Connect(function(input)
	if input.UserInputType == Enum.UserInputType.MouseButton1 or input.UserInputType == Enum.UserInputType.Touch 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)

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

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

-- Letter mapping (A–Z)
local letters ={ A = "🅰", B = "🅱", C = "🅲", D = "🅳", E = "🅴", F = "🅵", G = "🅶", H = "🅷", I = "🅸", J = "🅹", K = "🅺", L = "🅻", M = "🅼", N = "🅽", O = "🅾", P = "🅿", Q = "🆀", R = "🆁", S = "🆂", T = "🆃", U = "🆄", V = "🆅", W = "🆆", X = "🆇", Y = "🆈", Z = "🆉" }

local function replaceLetters(text)
	local result = ""
	for i = 1, #text do
		local char = text:sub(i, i)
		local upper = char:upper()
		if letters[upper] then
			result = result .. letters[upper]
		else
			result = result .. char
		end
	end
	return result
end

-- Chat Service
local ChatService = game:GetService("TextChatService")

SendButton.MouseButton1Click:Connect(function()
	local text = TextBox.Text
	if text ~= "" then
		local modified = replaceLetters(text)

		-- Send to chat
		if ChatService.ChatVersion == Enum.ChatVersion.TextChatService then
			ChatService.TextChannels.RBXGeneral:SendAsync(modified)
		else
			game.ReplicatedStorage.DefaultChatSystemChatEvents.SayMessageRequest:FireServer(modified, "All")
		end

		TextBox.Text = ""
	end
end)