Formula:Sagitta superscripta/styles.css

.sagittifer {
	position: relative;
	padding-top: 5px;
}

.sagittifer::before,
.sagittifer::after {
	content: "";
	position: absolute;
	display: block;
}

.sagittifer::before {
	left: 0;
	right: 0;
	top: 3px;
	height: 2px;
	width: 100%;
	background-color: #000;
}

.sagittifer.dextrorsus::before,
.sagittifer.sinistrorsus::before {
	width: calc(100% - 5px);
}

.sagittifer.sinistrorsus::after,
.sagittifer.dextrorsus::after {
	height: 0;
	width: 0;
	top: 1px;
	box-sizing: content-box;
	border-top: 3px solid transparent;
	border-bottom: 3px solid transparent;
}

.sagittifer.sinistrorsus::before {
	left: unset;
	right: 0;
}

.sagittifer.dextrorsus::before {
	right: unset;
	left: 0;
}

.sagittifer.sinistrorsus::after {
	border-left: none;
	border-right: 5px solid #000;
	left: 0px;
	right: unset;
}

.sagittifer.dextrorsus::after {
	border-left: 5px solid #000;
	border-right: none;
	right: 0px;
	left: unset;
}