.header {
	padding: 10vh 0;
	background: url(../img/startup.jpg) no-repeat;
	background-size: cover;
}

.header div{
	opacity: 1;

}
#sistemas img{
	width: 100%;
	display: block;
	margin: -100px auto 0 auto;
}
form{
	background-color: white;
	padding: 20px !important;
}

@media screen and (max-width: 480px){
	.header{
		height: auto;
	}
	form{
		width: 100%;
		padding: 1em;
	}
	form h2{
		font-size: 25px;
	}
}