@import url("https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,100;0,300;0,400;0,500;0,700;0,900;1,100;1,300;1,400;1,500;1,700;1,900&display=swap");
@import url("https://fonts.googleapis.com/css2?family=Roboto+Condensed:ital,wght@0,100..900;1,100..900&display=swap");
@import url("https://fonts.googleapis.com/css2?family=Roboto+Flex:opsz,wght@8..144,100..1000&display=swap");
@import url("https://fonts.googleapis.com/css2?family=Roboto+Mono:ital,wght@0,100..700;1,100..700&display=swap");
@import url("https://fonts.googleapis.com/css2?family=Roboto+Serif:ital,opsz,wght@0,8..144,100..900;1,8..144,100..900&display=swap");
@import url("https://fonts.googleapis.com/css2?family=Roboto+Slab:wght@100..900&display=swap");

:root {
	--serif-font: "Roboto Serif", serif;
	--sans-serif-font: "Roboto", sans-serif;
	--monospace-font: "Roboto Mono", monospace;

	--white-10: #ffffff;
	--white-20: #ebebeb;
	--white-30: #d6d6d6;
	--white-40: #c2c2c2;
	--white-50: #adadad;

	--black-10: #525252;
	--black-20: #3d3d3d;
	--black-30: #292929;
	--black-40: #141414;
	--black-50: #000000;
}

:root {
	--foreground: var(--white-10);
	--background: var(--black-50);

	--accent-10: var(--black-10);
	--accent-20: var(--black-20);
	--accent-30: var(--black-30);
	--accent-40: var(--black-40);
	--accent-50: var(--white-50);
}

@media (prefers-color-scheme: light) {
	:root {
		--foreground: var(--black-50);
		--background: var(--white-10);

		--accent-10: var(--white-50);
		--accent-20: var(--white-40);
		--accent-30: var(--white-30);
		--accent-40: var(--white-20);
		--accent-50: var(--black-10);
	}
}

body {
	display: flex;
	flex-direction: column;
	box-sizing: border-box;
	margin: 0;
	background: var(--background);
	padding: 1em;
	min-height: 100vh;
	color: var(--foreground);
	font-family: var(--sans-serif-font);
}

body>header {
	position: sticky;
	top: 0;
	margin-top: -1em;
	border-bottom: 0.1em solid var(--accent-50);
	background: var(--background);
	padding: 0.5em;
}

body>header>a {
	color: var(--foreground);
	font-weight: 500;
	font-size: 2em;
	text-decoration: none;

	&::after {
		content: "_";
	}

	&:hover::after {
		animation: blink 0.5s alternate infinite;
	}
}

@keyframes blink {
	to {
		opacity: 0;
	}

	from {
		opacity: 1;
	}
}

body>header>nav {
	display: flex;
	align-items: center;
}

body>header>nav>a {
	color: var(--foreground);
	text-decoration: none;

	&:hover {
		text-decoration: underline;
	}
}

body>.content {
	flex: 1;
	padding: 0.5em;
	overflow-y: hidden;
}

body>.content>main {
	min-width: auto;
}

body>.content>main {
	min-width: 60ch;
	max-width: 120ch;

	/* paragraphs */
	p {
		margin: 0;
		color: var(--accent-50);
	}

	>p {
		margin-block-start: 1em;
		margin-block-end: 1em;
	}

	/* headings */
	h1,
	h2,
	h3,
	h4,
	h5,
	h6 {
		margin: 0;
	}

	> :is(h1, h2, h3, h4, h5, h6) {
		margin-block-start: 1em;
		margin-block-end: 1em;
	}

	/* links */
	a {
		color: var(--foreground);
		text-decoration: none;

		&:hover {
			text-decoration: underline;
		}
	}

	/* images */
	img {
		border-radius: 0.26em;
	}

	/* block qutoes */
	blockquote {
		display: block;
		margin: 0;
		margin-left: 1em;
		margin-block-start: 1em;
		border-left: 0.2em solid var(--accent-40);
		padding-left: 0.5em;
	}

	/* lists */
	ul,
	ol {
		margin: 0;
		padding-left: 2em;
		color: var(--accent-50);

		li {
			margin: 0;
		}

		li::marker {
			color: var(--foreground);
		}
	}

	> :is(ul, ol) {
		margin-block-start: 1em;
		margin-block-end: 1em;
	}

	/* horizontal rule */
	hr {
		margin: 1em 0;
		border: none;
		border-bottom: 0.1em solid var(--accent-50);
	}

	/* inline code */
	p>code {
		display: inline-block;
		border-radius: 0.23em;
		background: var(--accent-40);
		padding: 0.2em;
		color: var(--foreground);
		font-size: 0.8em;
		line-height: 1;
		font-family: var(--monospace-font);
	}

	/* code blocks */
	pre {
		display: block;
		margin: 1em 0;
		border-radius: 0.26em;
		background: var(--accent-40);
		padding: 0.8em;
		width: fit-content;
		overflow: hidden;
	}

	pre>code {
		font-size: 0.8em;
		font-family: var(--monospace-font);
	}
}

body>footer {
	padding: 0.5em;
	color: var(--accent-10);
	white-space: nowrap;
}

body>footer>a {
	display: inline-block;
	margin: -0.2em 0;
	border-radius: 0.23em;
	background: #42a5f54d;
	padding: 0.2em;
	color: #42a5f5;
	line-height: 1;
	text-decoration: none;

	&:hover {
		text-decoration: underline;
	}
}