/* Extra small devices (phones, 600px and down) */
@media screen and (max-width:600px){ /*sm (576px) */ 
	canvas{
		/*border:1px solid red;*/
		height: 300px !important;
	}
}

@media screen and (min-width:600px){ /* sm (576px) */
	canvas{
		/*border:1px solid green;*/
		height: 400px !important;

	}
}