:root {
	--text-color: rgba(0, 0, 0, 0.75);
	--link-color: #3366CC;
	--link-visited: #7B68AE;
	--chrome-text: rgba(255, 255, 255, 0.85);
	--header-gradient-top: #3366CC;
	--header-gradient-bottom: #2855AA;
	--nav-gradient-top: #7B68AE;
	--nav-gradient-bottom: #6A5A9E;
	--nav-border: rgba(0, 0, 0, 0.3);
	--tagline-color: rgba(255, 255, 255, 0.6);
	--dateline-color: #7a9acc;
	--separator-color: rgba(0, 0, 0, 0.1);
	--footer-background: #1a1a1a;
	--footer-text: rgba(255, 255, 255, 0.5);
	--footer-link: rgba(255, 255, 255, 0.65);
	--footer-link-hover: rgba(255, 255, 255, 0.9);
	--footer-border: #111;
	--highlight-shadow: #fff;
	--nav-shadow: #fff;
	--body-background: #f0f0f4;
	--content-background: #f0f0f4;
	--content-width: 650px;
	--heading-color: rgba(0, 0, 0, 0.65);
	--blockquote-border: rgba(0, 0, 0, 0.2);
	--blockquote-color: rgba(0, 0, 0, 0.5);
	--heading-font: Verdana, Geneva, sans-serif;
}

@media (prefers-color-scheme: dark) {
	:root {
		--text-color: rgba(255, 255, 255, 0.75);
		--body-background: hsl(205, 21%, 10%);
		--content-background: hsl(212, 10%, 18%);
		--link-color: hsl(220, 90%, 70%);
		--link-visited: hsl(256, 40%, 68%);
		--header-gradient-top: hsl(220, 45%, 36%);
		--header-gradient-bottom: hsl(220, 45%, 28%);
		--nav-gradient-top: hsl(260, 30%, 38%);
		--nav-gradient-bottom: hsl(260, 30%, 32%);
		--nav-border: #000;
		--tagline-color: rgba(255, 255, 255, 0.35);
		--dateline-color: hsl(220, 50%, 60%);
		--separator-color: rgba(255, 255, 255, 0.15);
		--footer-background: hsl(205, 21%, 6%);
		--footer-text: rgba(255, 255, 255, 0.5);
		--footer-link: rgba(255, 255, 255, 0.55);
		--footer-link-hover: rgba(255, 255, 255, 0.85);
		--footer-border: #000;
		--highlight-shadow: transparent;
		--nav-shadow: transparent;
		--heading-color: rgba(255, 255, 255, 0.85);
		--blockquote-border: rgba(255, 255, 255, 0.2);
		--blockquote-color: rgba(255, 255, 255, 0.5);
	}
}

body {
	margin: 0;
	padding: 0;
	font-family: var(--heading-font);
	font-size: 1.1em;
	line-height: 1.8em;
	color: var(--text-color);
	background-color: var(--body-background);
}

img {
	max-width: 100%;
	height: auto;
}

a {
	color: var(--link-color);
	text-underline-offset: 3px;
}
a:visited {
	color: var(--link-visited);
}

/* Header */

#header-background {
	background: linear-gradient(to bottom, var(--header-gradient-top), var(--header-gradient-bottom));
}
header {
	color: #fff;
	padding: 18px 2px;
	max-width: var(--content-width);
	margin: 0 auto;
	display: flex;
	align-items: baseline;
	gap: 10px;
}
header .biglink {
	margin: 0;
	font-size: 20px;
	font-weight: bold;
}
header .biglink a {
	color: var(--chrome-text);
	text-decoration: none;
}
header .biglink a:hover {
	text-decoration: underline;
	text-underline-offset: 3px;
}
header .biglink a:visited {
	color: var(--chrome-text);
}
header .tagline {
	margin: 0;
	font-size: 17px;
	color: var(--tagline-color);
}

/* Nav bar */

#topnav-background {
	background: linear-gradient(to bottom, var(--nav-gradient-top), var(--nav-gradient-bottom));
	border-bottom: 1px solid var(--nav-border);
	box-shadow: 0 1px 0 var(--nav-shadow);
}
#topnav {
	max-width: var(--content-width);
	margin: 0 auto;
	padding: 3px 2px;
	text-align: right;
	font-size: 17px;
	font-weight: bold;
}
#topnav a {
	color: var(--chrome-text);
	text-decoration: none;
	margin-left: 16px;
}
#topnav a:visited {
	color: var(--chrome-text);
}
#topnav a:hover {
	text-decoration: underline;
	text-underline-offset: 3px;
}

/* Content area */

#content-background {
	background-color: var(--content-background);
}

/* Main content */

main {
	max-width: var(--content-width);
	margin: 0 auto;
	padding-top: 48px;
	padding-bottom: 32px;
}

/* Blog posts */

.post {
	margin-bottom: 4em;
}
.post h1 {
	margin: 14px 0 14px 0;
	font-size: 28px;
	font-weight: bold;
	line-height: 1.2em;
	color: var(--heading-color);
	text-shadow: 0 1px 0 var(--highlight-shadow);
}
.post h1 a {
	color: var(--heading-color);
	text-decoration: none;
}
.post h1 a:hover {
	text-decoration: underline;
	text-underline-offset: 3px;
	text-decoration-thickness: 2px;
}
.post h1 a:visited {
	color: var(--heading-color);
}
.post h3 {
	font-size: 20px;
	margin-top: 1.5em;
	margin-bottom: 0.5em;
	color: var(--heading-color);
}
.postBody {
	margin: 0;
}
.postBody p {
	margin: 0 0 14px 0;
}
.postBody a {
	text-decoration: underline;
}
.postDateline {
	font-size: 17px;
	font-weight: bold;
	color: var(--dateline-color);
	text-shadow: 0 1px 0 var(--highlight-shadow);
	margin-bottom: 4px;
	padding-bottom: 4px;
	border-bottom: 1px solid var(--separator-color);
	box-shadow: 0 1px 0 var(--highlight-shadow);
}
.postDateline a {
	color: var(--dateline-color);
	text-decoration: none;
}
.postDateline a:visited {
	color: var(--dateline-color);
}
.postDateline a:hover {
	text-decoration: underline;
	text-underline-offset: 3px;
}

blockquote {
	color: var(--blockquote-color);
	border-left: 3px solid var(--blockquote-border);
	padding-left: 18px;
	margin-left: 0;
	font-style: normal;
}

code, pre {
	font-family: "SF Mono", Menlo, "Courier", monospace;
	font-size: 17px;
	white-space: pre-wrap;
}

#archiveLink {
	margin-top: 16px;
}
#archiveLink a {
	text-decoration: underline;
	text-underline-offset: 3px;
}

.centeredImage {
	display: block;
	margin-left: auto;
	margin-right: auto;
}

/* Footer */

#footer-background {
	background-color: var(--footer-background);
	border-top: 1px solid var(--footer-border);
}
footer {
	max-width: var(--content-width);
	margin: 0 auto;
	padding: 32px 2px 36px 2px;
	font-size: 17px;
	color: var(--footer-text);
}
footer a {
	color: var(--footer-link);
	text-underline-offset: 3px;
}
footer a:visited {
	color: var(--footer-link);
}
footer a:hover {
	color: var(--footer-link-hover);
}
footer p {
	margin: 0;
	line-height: 1.6;
}
footer p + p {
	margin-top: 20px;
}

/* Responsive */

@media (max-width: 700px) {
	header {
		padding: 14px 12px;
	}
	#topnav {
		padding: 1px 12px;
	}
	main {
		padding: 32px 12px 0 12px;
	}
	footer {
		padding: 12px 12px 24px 12px;
	}
}

@media (max-width: 480px) {
	header {
		padding: 10px 12px;
		gap: 8px;
	}
	header .biglink {
		font-size: 17px;
	}
	header .tagline {
		font-size: 15px;
	}
	#topnav {
		font-size: 15px;
		padding: 2px 12px;
		text-align: left;
	}
	#topnav a {
		margin-left: 0;
		margin-right: 10px;
	}
	main {
		padding-top: 24px;
	}
	.post {
		margin-bottom: 2em;
	}
}