body{
    background-image: url('imagemdefundo.jpeg');
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    margin: 0;
}
header{
    color: rgb(255, 255, 255);
}
.container{
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}
main{
    background-color: rgb(255, 255, 255,0.7);
    border-radius: 10px;
    padding: 10px;
    display: flex; 
    flex-direction: column;
    align-items: center;
    width: 70%;
    height: 400px;
}
.retorno{
    width: 80%;
    height: 10%;
    border: 5px solid black;
}
footer{
    width: 100%;
    height: 100px;
    background-color: rgb(0,0,0,0.9);
    position: fixed;
    bottom: 0;
    color: rgb(255, 255, 255);
}