/* CSS Reset based on https://piccalil.li/blog/a-more-modern-css-reset/ */
*,
*::before,
*::after {
	box-sizing: border-box;
	/* Kill all default margins and paddings */
	margin: 0;
	padding: 0;
}

html {
	-moz-text-size-adjust: none;
	-webkit-text-size-adjust: none;
	text-size-adjust: none;
}

h1, h2, h3, h4, button, input, label {
	line-height: 1.1;
}

img, svg, picture  {
	max-width: 100%;
	display: block;
}

input, button, textarea, select {
	font-family: inherit;
	font-size: inherit;
}

textarea:not([rows]) {
	min-height: 10em;
}

:target {
	scroll-margin-block: 2.5em;
}

/* Overall styling */
html {
	color-scheme: light dark;
	font-family: sans-serif;
	overflow-wrap: break-word;
	scrollbar-gutter: stable;
}

hgroup h1 {
	margin-bottom: 0.1em;
}
hgroup p {
	font-style: italic;
	margin-bottom: 1em;
}

h1, h2, h3, h4 {
	margin-block-start: 1.25em;
	margin-block-end: 0.5em;
}

:is(p, ol, ul) + :is(p, ol, ul) {
	padding-block-start: 1em;
}

ol, ul {
	padding-inline-start: 1.25em;
}

/* 3d viewport */
.in3d {
	transform-style: preserve-3d;
}
.viewport {
	pointer-events: none;
	perspective: 300vmax;
}
.viewport * {
	pointer-events: initial;
}

/* Base Page Layout */
body {
	max-width: 50rem;
	padding: 0;
	margin-block: 0;
	margin-inline: auto;
}

.header {
	padding-block: 1em;
}

.hero {
	height: 30em;
	background-color: grey;
}

/* index */
.author {
	display: grid;
	grid-template-columns: auto 1fr;
	align-items: center;
	gap: 1em;
	margin-block: 1em;
}
.author h1 {
	margin-block-start: 0;
}
.author p {
	margin-block-end: 0;
}

/* sandbox */
.sandbox-inset-3d {
	contain: paint;
	background: black;
}
.sandbox-inset-3d .content {
	background: grey;
	transform: translateZ(-10rem);
	padding: 1rem 1rem;
	width: 80%;
	margin-inline: auto;
}
.sandbox-inset-3d div:where(.floor, .ceiling) {
	position: absolute;
	inset-inline: 0;
	height: 20rem;
}
.sandbox-inset-3d .floor {
	bottom: 0;
	background: blue;
	transform: rotateX(90deg);
	transform-origin: 0 100%;
}
.sandbox-inset-3d .ceiling {
	top: 0;
	background: green;
	transform: rotateX(-90deg);
	transform-origin: 0 0;
}