.wrapper_calc_balk {

	width: 100%;
	margin: 0 auto;
	max-width: 800px;
	min-height: 350px;
	border: 10px solid #8B0000;
	box-sizing: border-box;
	padding: 10px;
}
legend {
	color: blue !important;
}
.under_legend {
	color: black !important;
	margin:  0 0  5px 10px !important;
	font-size: 18px !important;
}
#beam {
	max-width: 800px;
	width: 100%;
}
@media (max-width: 500px) {
	.wrapper_calc_balk {
	border: 5px solid #8B0000;
	box-sizing: border-box;
	padding: 5px;
}
}