from tkinter import *

root = Tk()
root.geometry("400x400")
root.resizable(0, 0)
root.config(bg="#0a6a6e")
root.title("Alavancagem Operacional")

titulo = Label(text="Alavancagem Operacional",
               font=("Arial", "22", "bold"), bg="#0a6a6e", fg="#55e0e6")
titulo.place(relx=0.05, rely=0.05)
texto_sub1 = Label(text="Receita:",
                   font=("Arial", "15", "bold"), bg="#0a6a6e", fg="#55e0e6")
texto_sub1.place(relx=0.3, rely=0.25)
texto_sub2 = Label(text="Custos Variáveis:",
                   font=("Arial", "15", "bold"), bg="#0a6a6e", fg="#55e0e6")
texto_sub2.place(relx=0.08, rely=0.4)

texto_sub3 = Label(text="Lucro Operacional:",
                   font=("Arial", "15", "bold"), bg="#0a6a6e", fg="#55e0e6")
texto_sub3.place(relx=0.08, rely=0.55)

receitas = DoubleVar()
receitas_entrada = Entry(textvariable=receitas,
                         font=("Arial", "12", "bold"),
                         bg="white", fg="blue", justify='center')
receitas_entrada.place(relx=0.6, rely=0.25, relwidth=0.35)

Custos_Variáveis = DoubleVar()
Custos_Variáveis_entrada = Entry(textvariable=Custos_Variáveis,
                                 font=("Arial", "12", "bold"),
                                 bg="white", fg="blue", justify='center')
Custos_Variáveis_entrada.place(relx=0.6, rely=0.4, relwidth=0.35)
Lucro_Operacional = DoubleVar()
Lucro_Operacional_entrada = Entry(textvariable=Lucro_Operacional,
                                  font=("Arial", "12", "bold"),
                                  bg="white", fg="blue", justify='center')
Lucro_Operacional_entrada.place(relx=0.6, rely=0.55, relwidth=0.35)


def limpar():
    Custos_Variáveis_entrada.delete(0, END)
    Lucro_Operacional_entrada.delete(0, END)
    receitas_entrada.delete(0, END)
    resultado.set("")


def app():
    lucro = Lucro_Operacional.get()
    r = receitas.get()
    custo = Custos_Variáveis.get()
    d = r - custo
    alavancagem_operacional = d / lucro
    resultado.set(f"Alavancagem Operacional: {alavancagem_operacional:.2f}")


but1 = Button(text="Verificar", bd=2, bg='#107db2', fg='white',
              font=('verdana', 12, 'bold'), command=app)
but1.place(relx=0.05, rely=0.65, relwidth=0.25, relheight=0.1)
but_limpar = Button(text="Limpar", bd=2, bg='#107db2', fg='white',
                    font=('verdana', 12, 'bold'), command=limpar)
but_limpar.place(relx=0.35, rely=0.65, relwidth=0.25, relheight=0.1)

but_sair = Button(text="Sair", bd=2, bg='#107db2', fg='white',
                  font=('verdana', 12, 'bold'), command=root.destroy)
but_sair.place(relx=0.65, rely=0.65, relwidth=0.25, relheight=0.1)

resultado = StringVar()
resultado_texto = Label(textvariable=resultado,
                        font=("Arial", 12, "bold"), bg="#cfe2f3")
resultado_texto.place(relx=0.05, rely=0.8, relwidth=0.9, relheight=0.15)

root.mainloop()