header {
	background: linear-gradient(#000000, #FEFEFE);
	margin: 0 0;
  width: auto;
}

.caixa{
	align-content: center;
	width: auto;
}


.img_titulo{
  position: relative;
	margin: 0 0;
	align-items: center;
	align-content: center;
	width: 100vw;
}


@media screen and (max-width: 768px) {
    
    header {
        width: auto;
    }
}