js/page/style.css

:root {
	font-family: sans-serif;
	--color-bg: white;
	--color-fg: #222;
	--color-ac: #fbb;
	--color-hl: #f64;

	--line-mid: .14rem;
	--line-thick: .2rem;
}

* {
	box-sizing: border-box;
	color: var(--color-fg);
}

body {
	background: var(--color-bg);

	display: flex;
	flex-flow: column;
	align-items: center;
	padding: 1em 2em;
}

body>section {
	width: 100%;
	max-width: 60em;
}

h2 {
	padding: 0 1em 0 .2em;
	width: max-content;
	border-bottom: .1em solid var(--color-ac);
}

em {
	font-style: normal;
	font-weight: bold;
}

hr {
  all: unset;
  width: 100%;
  border-bottom: .2em solid var(--color-ac);
  grid-column: 1 / -1;
  margin: 1em 0;
}

.button {
	--color-primary: var(--color-hl);
	--color-secondary: var(--color-bg);
	display: inline-block;
	transition: all .3s;
	cursor: pointer;
	border-radius: .3em;
	border: var(--line-mid) var(--color-primary) solid;
	padding: .2em .6em;
	text-decoration: none;
	color: var(--color-primary);
	font-weight: bold;
}

.button:hover {
	color: var(--color-secondary);
	background-color: var(--color-primary);
	text-shadow: .2em .3em .2em #0004;
}

pre>code {
	display: block;
	border-left: dashed var(--line-mid) var(--color-ac);
	padding-left: 1.6em;
}

span[title] {
	cursor: help;
	border-bottom: dotted currentcolor .16em;
}

.all-unset {
	all: unset;
}

.columns {
	display: grid;
	grid-template-columns: repeat(2, 1fr);
	gap: 1.4em;
}
.columns>* {
	margin: 0;
}

.columns > * {
	flex: 100%;
}

.full-width {
	grid-column: 1/-1;
}

code-block:not(:defined) {
	font-family: monospace;
	white-space: pre-line;
}