@media (max-width: 320px) No responsive ?

Generally it’s because you forget the second closing curly bracket “{” at the end of the media statement.

In your case, it might be that you have a space between @ and media?

It should be

@media (max-width: 320px) {
	.selector {
		property: value;
		property: value;
	}
}

Being obsessive about indentation generally helps you find errors.

thanks in reviewing the lines I found that missing a (;), sometimes a good response gives a great solution.

best regards