.go_up_btn {
	background: black;
	position: fixed;
	bottom: 20px;
	right: 20px;
	color: white;
	font-size: 15px;
	cursor: pointer;
	transition: opacity 0.2s ease;
	opacity: 0;
	border-radius: 50%;
	width: 40px;
	height: 40px;
	line-height: 36px;
	text-align: center;
	padding: 0;
	z-index: 3;
}
html .page_scrolled > .go_up_btn {
	opacity: 0.4;
}
.go_up_btn.for_menu {
	display: none;
}

.go_up_btn:hover {
	opacity: 1!important;
}

#header_with_links .go_up_btn {
	background-color: #555;
	opacity: 1;
	z-index: 11;
	display: none;
}
.show_header_links #header_with_links.page_scrolled .go_up_btn {
	display: block;
}

@media( max-width: 1024px){
	html .has_toc > .go_up_btn {
		bottom: 65px;
	}
}