:root {
	--color-bg: #ffffff;
	--color-text: #1a1a1a;
	--color-muted: #666666;
	--color-accent: #e63946;
	--color-border: #e0e0e0;

	--font-body: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
		Helvetica, Arial, sans-serif;
	--font-mono: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas,
		monospace;

	--max-width: 65ch;
	--space-xs: 0.5rem;
	--space-sm: 1rem;
	--space-md: 2rem;
	--space-lg: 4rem;
}

*,
*::before,
*::after {
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}

html {
	font-size: 16px;
	line-height: 1.6;
}

body {
	font-family: var(--font-body);
	background-color: var(--color-bg);
	color: var(--color-text);
	display: flex;
	flex-direction: column;
	min-height: 100vh;
}

.site-header {
	border-bottom: 1px solid var(--color-border);
	padding: var(--space-sm) var(--space-md);
}

.site-header nav {
	max-width: var(--max-width);
	margin: 0 auto;
	display: flex;
	align-items: center;
	justify-content: space-between;
}

.logo {
	font-weight: 700;
	font-size: 1.25rem;
	color: var(--color-text);
	text-decoration: none;
}

.nav-links {
	list-style: none;
	display: flex;
	gap: var(--space-sm);
}

.nav-links a {
	color: var(--color-muted);
	text-decoration: none;
	transition: color 0.15s ease;
}

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

main {
	flex: 1;
	max-width: var(--max-width);
	width: 100%;
	margin: 0 auto;
	padding: var(--space-lg) var(--space-md);
}

.site-footer {
	border-top: 1px solid var(--color-border);
	padding: var(--space-sm) var(--space-md);
	text-align: center;
	color: var(--color-muted);
	font-size: 0.875rem;
}

h1 {
	font-size: 2rem;
	font-weight: 800;
	line-height: 1.2;
	margin-bottom: var(--space-sm);
}

h2 {
	font-size: 1.5rem;
	font-weight: 700;
	line-height: 1.3;
	margin-top: var(--space-md);
	margin-bottom: var(--space-xs);
}

h3 {
	font-size: 1.125rem;
	font-weight: 600;
	margin-top: var(--space-sm);
	margin-bottom: var(--space-xs);
}

p {
	margin-bottom: var(--space-sm);
}

a {
	color: var(--color-accent);
	text-decoration: underline;
	text-underline-offset: 0.15em;
}

a:hover {
	text-underline-offset: 0.2em;
}

ul,
ol {
	margin-left: var(--space-md);
	margin-bottom: var(--space-sm);
}

pre {
	background-color: #f5f5f5;
	padding: var(--space-sm);
	border-radius: 6px;
	overflow-x: auto;
	font-family: var(--font-mono);
	font-size: 0.875rem;
	margin-bottom: var(--space-sm);
}

code {
	font-family: var(--font-mono);
	font-size: 0.875em;
	background-color: #f5f5f5;
	padding: 0.15em 0.35em;
	border-radius: 3px;
}

pre code {
	background: none;
	padding: 0;
}

@media (prefers-color-scheme: dark) {
	:root {
		--color-bg: #0a0a0a;
		--color-text: #ededed;
		--color-muted: #a0a0a0;
		--color-border: #333333;
	}

	pre {
		background-color: #1a1a1a;
	}

	code {
		background-color: #1a1a1a;
	}
}

@media (max-width: 480px) {
	html {
		font-size: 15px;
	}

	main {
		padding: var(--space-md) var(--space-sm);
	}

	.site-header nav {
		flex-direction: column;
		gap: var(--space-xs);
	}
}