.main_ctn {
	display: flex;
	flex-direction: row;
	justify-content: space-between;
}

.main_ctn .content {
	width: 100%;
}

@media only screen and (max-width : 900px) {
	.main_ctn {
		flex-direction: column;
		justify-content: flex-start;
		height: auto;
	}

	.main_ctn .sub_ctn {
		width: 100%;
	}
}