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

:root {
	--color-text: #1a1a1a;
	--color-bg: #fafafa;
	--color-accent: #1a5c5c;
	--color-muted: #555555;
	--color-border: #cccccc;
	--color-link: #1a5c5c;
	--color-link-visited: #4a3a6a;
	--max-width: 700px;
	--font-body: system-ui, -apple-system, 'Segoe UI', sans-serif;
}

@media (prefers-color-scheme: dark) {
	:root {
		--color-text: #e0e0e0;
		--color-bg: #1a1a1a;
		--color-accent: #5abfbf;
		--color-muted: #aaaaaa;
		--color-border: #333333;
		--color-link: #5abfbf;
		--color-link-visited: #b0a0d0;
	}
}

[data-theme="light"] {
	--color-text: #1a1a1a;
	--color-bg: #fafafa;
	--color-accent: #1a5c5c;
	--color-muted: #555555;
	--color-border: #cccccc;
	--color-link: #1a5c5c;
	--color-link-visited: #4a3a6a;
}

[data-theme="dark"] {
	--color-text: #e0e0e0;
	--color-bg: #1a1a1a;
	--color-accent: #5abfbf;
	--color-muted: #aaaaaa;
	--color-border: #333333;
	--color-link: #5abfbf;
	--color-link-visited: #b0a0d0;
}

body {
	font-family: var(--font-body);
	font-size: 1rem;
	line-height: 1.6;
	color: var(--color-text);
	background-color: var(--color-bg);
	margin: 0;
	padding: 0;
}

.skip-link {
	position: absolute;
	top: -100%;
	left: 0;
	padding: 0.5rem 1rem;
	background: var(--color-accent);
	color: var(--color-bg);
	z-index: 100;
	text-decoration: none;
	font-weight: bold;
}

.skip-link:focus {
	top: 0;
}

header {
	max-width: var(--max-width);
	margin: 0 auto;
	padding: 2rem 1rem 1rem;
}

.site-title {
	font-size: 1.25rem;
	font-weight: bold;
	color: var(--color-text);
	text-decoration: none;
}

.site-title:visited {
	color: var(--color-text);
}

.site-title:hover {
	color: var(--color-accent);
}

nav[aria-label="Main"] ul {
	list-style: none;
	padding: 0;
	margin: 1rem 0 0;
	display: flex;
	flex-wrap: wrap;
	gap: 1rem;
}

nav[aria-label="Main"] a {
	color: var(--color-link);
	text-decoration: none;
}

nav[aria-label="Main"] a:visited {
	color: var(--color-link);
}

nav[aria-label="Main"] a:hover {
	text-decoration: underline;
}

nav[aria-label="Main"] a[aria-current="page"] {
	font-weight: bold;
	text-decoration: underline;
}

main {
	max-width: var(--max-width);
	margin: 0 auto;
	padding: 1rem;
}

a {
	color: var(--color-link);
}

a:visited {
	color: var(--color-link-visited);
}

a:hover {
	color: var(--color-accent);
}

h1, h2, h3, h4, h5, h6 {
	line-height: 1.3;
	margin-top: 1.5em;
	margin-bottom: 0.5em;
}

h1 {
	font-size: 2rem;
	margin-top: 0;
}

h2 {
	font-size: 1.5rem;
}

h3 {
	font-size: 1.25rem;
}

p {
	margin: 0 0 1em;
}

ul, ol {
	margin: 0 0 1em;
	padding-left: 1.5em;
}

li {
	margin-bottom: 0.25em;
}

hr {
	border: none;
	border-top: 1px solid var(--color-border);
	margin: 2rem 0;
}

article header {
	padding: 0;
	margin-bottom: 1.5rem;
}

article time {
	color: var(--color-muted);
	font-size: 0.9rem;
	display: block;
	margin-top: 0.25rem;
}

.last-updated {
	color: var(--color-muted);
	font-size: 0.85rem;
	margin: 0.25rem 0 0;
}

article > footer {
	margin-top: 2rem;
	padding-top: 1rem;
	border-top: 1px solid var(--color-border);
	color: var(--color-muted);
	font-size: 0.9rem;
}

.post-summary {
	margin-bottom: 2rem;
}

.post-summary h2 {
	margin-bottom: 0.25rem;
}

.post-summary time {
	color: var(--color-muted);
	font-size: 0.9rem;
	display: block;
	margin-bottom: 0.5rem;
}

body > footer {
	max-width: var(--max-width);
	margin: 0 auto;
	padding: 2rem 1rem;
	border-top: 1px solid var(--color-border);
	color: var(--color-muted);
	font-size: 0.9rem;
}

#theme-toggle {
	background: none;
	border: 1px solid var(--color-border);
	color: var(--color-text);
	padding: 0.25rem 0.75rem;
	cursor: pointer;
	font-size: 0.85rem;
	border-radius: 4px;
	margin-top: 0.5rem;
}

#theme-toggle:hover {
	border-color: var(--color-accent);
	color: var(--color-accent);
}

:focus-visible {
	outline: 3px solid var(--color-accent);
	outline-offset: 2px;
}

@media (max-width: 480px) {
	h1 {
		font-size: 1.5rem;
	}

	h2 {
		font-size: 1.25rem;
	}
}