v5/src/app.css

@import url("https://fonts.googleapis.com/css2?family=JetBrains+Mono:ital,wght@0,100..800;1,100..800&display=swap");
@import "tailwindcss";
@config "../tailwind.config.ts";

.tree,
.tree ul {
	position: relative;
	padding-left: 0;
	list-style-type: none;
	line-height: var(--line-height);
}

.tree ul {
	margin: 0;
}

.tree ul li {
	position: relative;
	padding-left: 1.5ch;
	margin-left: 1.5ch;
	border-left: var(--border-thickness) solid var(--text-color);
}

.tree ul li:before {
	position: absolute;
	display: block;
	top: calc(var(--line-height) / 2);
	left: 0;
	content: "";
	width: 1ch;
	border-bottom: var(--border-thickness) solid var(--text-color);
}

.tree ul li:last-child {
	border-left: none;
}

.tree ul li:last-child:after {
	position: absolute;
	display: block;
	top: 0;
	left: 0;
	content: "";
	height: calc(var(--line-height) / 2);
	border-left: var(--border-thickness) solid var(--text-color);
}