@layer reset, defaults, themes, utilities;



/* ===========
	THEMES
=========== */

@layer themes {

:root {
	--fore-colour: #222;
	--back-colour: white;
	--hot-colour: crimson;
	--cold-colour: mediumBlue;
}
@media (prefers-color-scheme: dark) {
	:root {
		--fore-colour: white;
		--back-colour: #282828;
		--hot-colour: darkOrange;
		--cold-colour: powderBlue;
	}
}

/* =========== END THEMES */ }



/* ==========
	RESET
========== */

@layer reset {

*,
::before,
::after {
	box-sizing: border-box;
}

/* ========== END RESET */ }



/* ==============
	UTILITIES
============== */

@layer utilities {

.uppercase {
	text-transform: uppercase;
}
.lowercase {
	text-transform: lowercase;
}
.undo-case {
	text-transform: none;
}

/* ============== END UTILITIES */ }



/* ==============
	DEFAULTS
============== */

@layer defaults {

/* STRUCTURE */

:root {
	--gap: 1.5rem;
	--line: 2px solid var(--fore-colour);
	--interface-font-size: 1.2em;
	--meta-font-size: 0.8em;
}
body {
	font-size: 18px;
	font-family: sans-serif;
	margin: 0;
	color: var(--fore-colour);
	background-color: var(--back-colour);
	line-height: 1.5;
}
#skip-link {
	position: absolute;
	inset-block-start: 0;
	inset-inline-start: 0;
	color: var(--back-colour);
	background-color: var(--fore-colour);
	clip-path: inset(50%);
	&:focus {
		clip-path: unset;
	}
}
#container {
	margin: 3rem auto;
	max-inline-size: 750px;
	border-inline: var(--line);
	& > * {
		padding-inline: 1rem;
	}
}
.flex-list {
	display: flex;
	flex-direction: row;
	flex-wrap: wrap;
	padding-inline-start: 0;
	list-style-type: "";
}

/* HEADER */

#header {
	color: var(--back-colour);
	background-color: var(--fore-colour);
	* {
		margin-block: 0;
	}
}
#main-nav {
	a {
		display: block;
		padding-block-start: 0.3em;
		padding-block-end: 0.2em;
		padding-inline: 0.4em;
		font-size: var(--interface-font-size);
		color: var(--back-colour);
		text-decoration: unset;
		&:hover {
			background-color: var(--hot-colour);
		}
	}
}
#header-message {
	padding-block-start: 0.3rem;
	padding-block-end: 0.2rem;
	padding-inline: 0.5rem;
	border-block-start: var(--line);
	border-color: var(--back-colour);
	&::before {
		content: "\25c9 \a0"; /* fisheye + non-breaking space */
		color: var(--hot-colour);
	}
	a {
		color: inherit;
		background-color: inherit;
	}
}

/* TEXT */
:is(h1, h2, h3) + * {
	margin-block-start: 0;
}
h1 {
	margin-block-start: 1rem;
	margin-block-end: 0;
}
h2 {
	margin-block-start: 3rem;
	margin-block-end: 0.25rem;
}
h3 {
	margin-block-start: 2rem;
	margin-block-end: 0.25rem;
}
details {
	margin-block: 1rem;
	margin-inline-start: var(--gap);
}
summary {
	cursor: pointer;
	font-weight: bold;
	margin-inline-start: -1rem;
	& + * {
		margin-block-start: 0;
	}
}
a:link {
	color: var(--hot-colour);
}
a:visited {
	color: var(--cold-colour);
}
a:hover {
	color: var(--back-colour);
	&:link {
		background-color: var(--hot-colour);
	}
	&:visited {
		background-color: var(--cold-colour);
	}
}
code {
	font-size: 0.8em;
}
.code-block {
	display: block;
	margin-block: 1rem;
	color: var(--back-colour);
	background-color: var(--fore-colour);
	overflow-x: auto;
	white-space: pre;
	tab-size: 4ch;
}
blockquote {
	margin-inline: var(--gap);
}
::marker {
	color: var(--hot-colour);
}

/* MEDIA */

img {
	display: block;
	margin-inline: auto;
}
figure {
	margin-inline: var(--gap);
}
figcaption {
	text-align: center;
	blockquote + &::before {
		content: "\2014 \a0"; /* em dash + non-breaking space */
	}
}
.gallery {
	--gallery-cols: 1;
	display: grid;
	grid-template-columns: repeat(var(--gallery-cols), 1fr);
	gap: calc(2rem / var(--gallery-cols));
	padding-left: 0;
	list-style-type: "";
	&:has(:nth-child(2)) {
		--gallery-cols: 2;
	}
	&:has(:nth-child(5)) {
		--gallery-cols: 3;
	}
	&:has(:nth-child(10)) {
		--gallery-cols: 4;
	}
	img {
		height: 100%;
		width: 100%;
		aspect-ratio: 1;
		object-fit: cover;
	}
}
iframe {
	max-inline-size: 100%;
	display: block;
	margin-block: 1rem;
	border: var(--line);
}

/* POST LISTS */

.post-list {
	padding-inline-start: var(--gap);
	list-style-type: "";
	text-indent: calc(-1 * var(--gap));
	font-size: var(--interface-font-size);
}
#tag-index {
	padding-inline-start: 0;
	list-style-type: "";
	details {
		margin-block: 0;
	}
	[open] {
		margin-block-end: 1rem;
	}
	summary {
		font-size: var(--interface-font-size);
	}
}

/* POSTS */

article > header {
	margin-block-end: 1rem;
	padding-block-end: 1rem;
	border-block-end: var(--line);
	h1 {
		margin-block-end: 0.5rem;
		font-size: 2.2rem;
	}
	& + * {
		margin-block-start: 0;
	}
}
#post-tags {
	margin-block: 0;
	& > li:not(:last-child)::after {
		content: ",\a0"; /* comma + non-breaking space */
	}
	a::before {
		content: "#";
	}
}
#post-nav > ul {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: var(--gap);
	padding-inline-start: 0;
	list-style-type: "";
	& > :first-child > a::before {
		content: "\2190 \a0"; /* left arrow + non-breaking space */
	}
	& > :last-child {
		text-align: right;
		a::after {
			content: "\2192 \a0"; /* right arrow + non-breaking space */
		}
	}
}

/* FOOTER */

#footer {
	padding-block-start: 1rem;
	border-block: var(--line);
	font-size: var(--meta-font-size);
	[rel="return"]::before {
		content: "\2191 \a0"; /* up arrow + non-breaking space */
	}
}
#contact-links {
	& > li:not(:last-child)::after {
		content: "\a0 |\a0"; /* non-breaking space + pipe + non-breaking space */
	}
}

/* ============== END DEFAULTS */ }