black_screen {
	/*display: none;*/
	position: fixed;
	top: 0;
	right: 0;
	bottom: 0;
	left: 0;
	background: #000000;
	/*z-index: 99999;*/
	z-index: 1;
	opacity: 0;
	-webkit-transition: opacity 400ms ease-in;
	-moz-transition: opacity 400ms ease-in;
	transition: opacity 400ms ease-in;
	pointer-events: none;	
}
nav3 {
	position: absolute;
	z-index: 2;
}
nav4 {
	position: absolute;
	z-index: 2;
}
section {
-webkit-transition: margin-top 400ms ease-in;
-moz-transition: margin-top 400ms ease-in;
transition: margin-top 400ms ease-in;
		margin-top: 63px;
}

@media screen and (max-width: 850px) {
	/*section {
		margin-top: 0px;
	}*/
	.section_0 {
		margin-top: 0;
	}
	.section_358 {
		margin-top: 358px;
	}
}

/*@media screen and (max-width: 830px) {
	section {
		margin-top: 360px;
	}
}

@media screen and (max-width: 485px) {	
	section {
		margin-top: 181px;
	}
}*/