header {
	position: fixed;
	z-index: 999;
    width: 100%;
    top: 0;
}

main {
	margin-top: 104px;
}

@media (max-width:1199.98px) {
	main {
		margin-top: 80px;
	}
}

@media (max-width:767.98px) {
    main {
        margin-top: 60px;
    }
}

@media (max-width:575.98px) {
    main {
        margin-top: 48px;
    }
}