.header_paralax
{
	background: url("img/header_2.jpg");
	height: 30vh;
	background-repeat: no-repeat;
	background-size: cover;
  display: flex;
  flex-direction: column;
  justify-content: center;
}	
@media (min-height: 1400px) 
	{ 
		.header_paralax
			{
				background: url("img/header_2_m.jpg");
				height: 30vh;
				background-repeat: no-repeat;
				background-size: cover;
			  display: flex;
			  flex-direction: column;
			  justify-content: center;
			}
	}
@media (max-width: 728px) 
	{ 
		.header_paralax
			{
				background: url("img/header_2_m.jpg");
				height: 30vh;
				background-repeat: no-repeat;
				background-size: cover;
			  display: flex;
			  flex-direction: column;
			  justify-content: center;
			}
	}