index.css

:root {
	--transition-duration: 0.2s;
	--header-size: 4rem;
	--spacer: 16px;
	font-size: 16px;
}

@media (prefers-color-scheme: dark) {
	:root {
		color-scheme: dark;
		--background-color: hsl(240, 0%, 8%);
		--text-color: hsl(240, 0%, 86%);
		--header-text-color: hsl(250, 38%, 65%);
		--accent-color: hsl(38, 100%, 45%);
		--sky-color-dark: hsl(215, 100%, 6%);
		--sky-color-light: hsl(245, 40%, 24%);
		--meteor-color: hsl(240, 100%, 78%);
		--navigation-background: rgba(0, 0, 0, 0.6);
		--navigation-text-color: hsl(240, 0%, 90%);
	}

	#theme-icon-mask-part {
		cx: 85%;
		cy: 10%;
	}
}

@media (prefers-color-scheme: light) {
	:root {
		color-scheme: light;
		--background-color: hsl(220, 0%, 100%);
		--text-color: hsl(220, 0%, 0%);
		--header-text-color: hsl(200, 100%, 86%);
		--accent-color: hsl(34, 100%, 55%);
		--sky-color-dark: hsl(220, 100%, 30%);
		--sky-color-light: hsl(190, 64%, 72%);
		--meteor-color: hsl(185, 100%, 80%);
		--navigation-background: rgba(0, 0, 0, 0.8);
		--navigation-text-color: hsl(220, 0%, 100%);
	}

	#theme-icon-mask-part {
		cx: 115%;
		cy: -20%;
	}
}

[data-theme='dark'] {
	color-scheme: dark;
	--background-color: hsl(240, 0%, 8%);
	--text-color: hsl(240, 0%, 86%);
	--header-text-color: hsl(250, 38%, 65%);
	--accent-color: hsl(38, 100%, 45%);
	--sky-color-dark: hsl(215, 100%, 6%);
	--sky-color-light: hsl(245, 40%, 24%);
	--meteor-color: hsl(240, 100%, 78%);
	--navigation-background: rgba(0, 0, 0, 0.6);
	--navigation-text-color: hsl(240, 0%, 90%);
}

[data-theme='dark'] #theme-icon-mask-part {
	cx: 85%;
	cy: 10%;
}

[data-theme='light'] {
	color-scheme: light;
	--background-color: hsl(220, 0%, 100%);
	--text-color: hsl(220, 0%, 0%);
	--header-text-color: hsl(200, 100%, 86%);
	--accent-color: hsl(34, 100%, 55%);
	--sky-color-dark: hsl(220, 100%, 30%);
	--sky-color-light: hsl(190, 64%, 72%);
	--meteor-color: hsl(185, 100%, 80%);
	--navigation-background: rgba(0, 0, 0, 0.8);
	--navigation-text-color: hsl(220, 0%, 100%);
}

[data-theme='light'] #theme-icon-mask-part {
	cx: 115%;
	cy: -20%;
}

[data-loading] * {
	/* disables transitions before theme is set */
	transition: none !important;
}

html, body, .slideshow {
	height: 100%;
}

html, body {
	/* Prevent mobile address bar from moving */
	overflow: hidden;
}

body {
	margin: 0;
	background: var(--background-color);
	color: var(--text-color);
	font-family: 'Open Sans', sans-serif;
	line-height: 1.6;
	transition: background-color var(--transition-duration);
}

:focus-visible {
	outline: 2px solid var(--accent-color);
	outline-offset: -2px;
}

.slideshow {
	scroll-snap-type: y mandatory;
	overflow: auto;
}

.slideshow:focus-visible {
	outline-offset: 0;
}

.slide {
	display: grid;
	grid-template-rows: var(--header-size) 1fr;
	width: 100%;
	height: 100%;
	box-sizing: border-box;
	scroll-snap-align: start;
	transition: color var(--transition-duration);
}

.slide-body {
	overflow: auto;
}

.slideshow-sticky {
	position: sticky;
	inset: 0;
	z-index: 1;
	height: 0;
}

header {
	display: flex;
	justify-content: space-between;
	height: var(--header-size);
}

.icon-button {
	padding: var(--spacer);
	aspect-ratio: 1;
	display: flex;
	background: none;
	border: none;
	color: var(--accent-color);
	font-size: 1em;
	cursor: pointer;
	-webkit-tap-highlight-color: transparent;
	transition: color var(--transition-duration);
}

.icon-button svg {
	width: 100%;
	height: 100%;
	fill: currentColor;
	transition: transform var(--transition-duration);
}

@media (hover: hover) {
	.icon-button:hover svg {
		transform: scale(1.2);
	}
}

.icon-button:active svg {
	transform: scale(0.8);
}

#menu {
	z-index: 1;
}

#menu rect {
	transition: x var(--transition-duration);
}

#menu[aria-expanded='true'] rect:first-child {
	x: 2.75px;
}

#menu[aria-expanded='true'] rect:nth-child(2) {
	x: 4px;
}

#menu[aria-expanded='true'] rect:nth-child(3) {
	x: 3.25px;
}

nav {
	position: fixed;
	inset: 0;
	background: var(--navigation-background);
	color: var(--navigation-text-color);
	display: none;
	inset: 0;
	width: 100%;
	height: 100%;
	box-sizing: border-box;
	padding-block-start: var(--header-size);
	backdrop-filter: blur(4px);
}

nav div {
	display: flex;
	overflow: auto;
	flex-direction: column;
	height: 100%;
}

nav[open] {
	display: block;
}

nav a {
	padding-inline: calc(3 / 2 * var(--spacer));
	height: var(--header-size);
	display: flex;
	align-items: center;
	color: inherit;
	text-decoration: none;
	font-weight: 600;
}

@media (hover: hover) {
	nav a:hover {
		text-decoration: underline;
	}
}

#theme-icon-mask-part {
	transition: cx var(--transition-duration), cy var(--transition-duration);
}

.cover-art {
	grid-row-start: 2;
	position: relative;
	display: grid;
	place-items: center;
	color: var(--header-text-color);
	text-align: center;
}

.title {
	grid-row-start: 2;
	transform: translateY(-50%);
	padding: var(--spacer);
}

#sky {
	position: absolute;
	inset: 0;
	width: 100%;
	height: 100%;
}

#sky stop {
	transition: stop-color var(--transition-duration);
}

h1 {
	margin: 0;
	font-weight: 800;
	font-size: 2em;
}

h2 {
	height: var(--header-size);
	padding-inline-start: var(--header-size);
	margin: 0;
	display: flex;
	align-items: center;
	font-weight: 800;
}

[role='doc-subtitle'] {
	font-weight: 600;
}

.gallery {
	scroll-snap-type: x mandatory;
	overflow: auto;
	display: grid;
	grid-auto-flow: column;
	grid-auto-rows: 100%;
	grid-auto-columns: 100%;
	gap: var(--spacer);
}

.gallery-item {
	scroll-snap-align: center;
	width: 100%;
	height: 100%;
	object-fit: contain;
}

.gallery-info {
	height: var(--header-size);
	display: flex;
}

#project-name {
	height: var(--header-size);
	display: flex;
	align-items: center;
	font-weight: 600;
}

.network-link {
	display: flex;
	align-items: center;
	height: var(--header-size);
	padding-inline: calc(3 / 2 * var(--spacer));
	color: inherit;
	text-decoration: none;
}

@media (hover: hover) {
	.network-link:hover {
		text-decoration: underline;
	}
}

@-moz-document url-prefix() {
	#stars {
		/* Firefox can't render <feTurbulence> at native resolution */
		filter: none;
	}
}