.wrapper_obem_cilindr {

	width: 100%;
	margin: 0 auto 20px auto;
	max-width: 750px;
	min-height: 350px;
	border: 10px solid black;
	box-sizing: border-box;
	padding: 10px;
}
#decide_btn {
	margin: 10px 0 0 0;
}
#tip1 {
	margin: 10px 0 0 0;
}
#tip2, #tip3, #tip4 {
	display: none;
	margin: 10px 0 0 0;
}
#output_div {
	font-size: 1.2em !important; 
	padding: 20px !important;
} 
.image_cilindr {
	width: 60%;
}
@media (max-width: 600px) {
	.wrapper_obem_cilindr {
		border: 5px solid black;
	}
	.input-group-addon {
		padding: 6px !important;
	}
	
	
}