.section, .sdiv1, .sdiv2, .sdiv3, .sdiv4 {	
	display:flex;	
	flex-wrap: wrap;	
	align-content:center;	
}
.section {
	width:100vw;
	justify-content: center;
	padding:25px 0;
}
.sdiv1, .sdiv2, .sdiv3, .sdiv4 {
	min-width:320px;	
}
.sdiv1 {
	flex-grow:1;
	max-width:320px;
}
.sdiv2 {
	flex-grow:2;
	max-width:640px;
}
.sdiv3 {
	flex-grow:3;
	max-width:960px;
}
.sdiv4 {
	flex-grow:4;
	max-width:1280px;
}