.wrapper_stropila { 

	width: 100%;
	margin: 0 auto;
	max-width: 900px;
	border: 10px solid #7B68EE;
	box-sizing: border-box;
	padding: 10px;
}
#img_1, #img_2 {
	width: 100%;
}
#blok_alfa {
	display: none;
}
#output_div {
	font-size: 1.1em;
	color: blue;
}
#menu_1 {
	margin: 5px;
}
.btn_menu {
	width: 100% !important;
}
.menu_stropil {
	font-size: 1em !important;
	font-weight: bold;
	padding: 5px;
	border: 1px dashed gray;
	color: blue;
	box-sizing: border-box;
}
#shag_1 {
	padding: 10px !important;
}
#shag_2, #shag_3, #shag_4 {
	display: none;
	padding: 10px !important;
}
#decide_btn {
	margin:  10px !important;
}
#blok_b {
	display: none;
}
output {
	color: blue !important;
	font-size: 1em !important;
}
@media (max-width: 600px) {
	.wrapper_stropila {
		padding: 5px !important;
		border: 5px solid #7B68EE;
	}

}