style.css

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;1,100;1,200;1,300;1,400;1,500;1,600;1,700&display=swap');

:root {
	--major-grid-color: #000;
	--major-grid-weight: 1;
}

body {
	margin: 0;
	background-color: #333;
}

h1 {
	color: #fff;
	font-family: Arial, Helvetica, sans-serif;
	font-size: 22px;
	padding: 0;
	margin: 0;
	margin-bottom: 20px;
}

.printers {
	padding: 15px;
	border-radius: 5px;
	background-color: #222;
}

.printers button {
	display: inline;
	background-color: #333;
	border: none;
	outline: none;
	color: #fff;
	padding: 5px 10px;
	border-radius: 5px;
	cursor: pointer;
	margin-right: 10px;
	margin-bottom: 10px;
}

.printers button:hover {
	background-color: #444;
}

.container {
	padding: 20px 10px;
	width: 100%;
	max-width: 1140px;
	margin: 0 auto;
}

.expandable {
  cursor: pointer;
}

.expandable.active {
  display: block;
}

.expandable:not(.active) + ol {
  display: none;
}

.expandable.active + ol li {
  display: block;
}

.expandable span {
	position: relative;
}

.expandable span::after {
	content: " \22BB;";
}

.expandable.active span::after {
	content: " \22BC;";
}

.menus {
	font-family: 'IBM Plex Mono', monospace;
	color: #fff;
	background-color: #4871F4;
	font-size: 18px;
	border-radius: 5px;
}

ol span {
	display: block;
	position: relative;
}

ol span::before {
	content: "";
	position: absolute;
	top: 10px;
	left: -28px;
	width: 20px;
	height: 1px;
	background-color: #fff;
}

ol {
	padding-inline-start: 20px;
	position: relative;
	list-style: none;
}

ol:first-child {
	padding: 20px 20px 20px 50px;
}

ol:first-child::before {
	display: none;
}

ol::before {
	content: "";
	position: absolute;
	top: -13px;
	left: -8px;
	width: 1px;
	height: calc(100%);
	background-color: #fff;
}