from tkinter import *

def consumo_total(distancia, consumo_por_km):
    return distancia * consumo_por_km

root = Tk()
root.geometry("700x400")
root.resizable(0, 0)
root.config(bg="#103030")
root.title("Consumo de combustível Navio")

titulo = Label(text="Consumo de combustível Navio",
               font=("Arial", "28", "bold"),
               bg="#103030", fg="#49e3e3")
titulo.place(relx=0.08, rely=0.05)

texto_sub1 = Label(text="Distância (milhas náuticas):",
                   font=("Arial", "18", "bold"),
                   bg="#103030", fg="#49e3e3")
texto_sub1.place(relx=0.12, rely=0.32)

texto_sub2 = Label(text="Consumo (litros por milha):",
                   font=("Arial", "18", "bold"),
                   bg="#103030", fg="#49e3e3")
texto_sub2.place(relx=0.08, rely=0.45)

Distancia = StringVar()
Distancia_entrada = Entry(textvariable=Distancia,
                          font=("Arial", "12", "bold"),
                          bg="white", fg="blue", justify='center')
Distancia_entrada.place(relx=0.6, rely=0.33, relwidth=0.35)
Distancia_entrada.focus()

Consumo = StringVar()
Consumo_entrada = Entry(textvariable=Consumo,
                        font=("Arial", "12", "bold"),
                        bg="white", fg="blue", justify='center')
Consumo_entrada.place(relx=0.6, rely=0.46, relwidth=0.35)

def limpar():
    Consumo_entrada.delete(0, END)
    Distancia_entrada.delete(0, END)
    resultado_texto.config(text="")

def app():
    try:
        consumo = float(Consumo.get())
        distancia = float(Distancia.get())

        total = consumo_total(distancia, consumo)

        resultado_texto.config(
            text=f"Combustível necessário: {total:.2f} litros"
        )

    except ValueError:
        resultado_texto.config(text="Valor digitado inválido")

but1 = Button(text="Calcular", bd=2, bg='#107db2', fg='white',
              font=('verdana', 12, 'bold'), command=app)
but1.place(relx=0.1, 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=0.4, 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=0.7, rely=0.65, relwidth=0.25, relheight=0.1)

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

root.mainloop()