:root {
  --color-bg: #fff;
  --color-text: #1a1a1a;
  --color-text-muted: #555;
  --color-link: #0055aa;
  --color-link-visited: #553388;
  --color-border: #ddd;
  --color-code-bg: #f5f5f5;
  --color-header-bg: #fafafa;
  --max-width: 42rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #111;
    --color-text: #e0e0e0;
    --color-text-muted: #999;
    --color-link: #6db3f2;
    --color-link-visited: #b48ade;
    --color-border: #333;
    --color-code-bg: #1a1a1a;
    --color-header-bg: #0a0a0a;
  }
}

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

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, "Helvetica Neue", Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
}

a {
  color: var(--color-link);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

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

a:hover {
  text-decoration-thickness: 2px;
}

header {
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-header-bg);
}

header nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.site-name {
  font-weight: 700;
  font-size: 1.1rem;
  text-decoration: none;
  color: var(--color-text);
  letter-spacing: 0.05em;
}

header nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 1rem;
}

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

h1, h2, h3, h4 {
  line-height: 1.3;
  margin-top: 2rem;
  margin-bottom: 0.5rem;
}

h1 { font-size: 1.8rem; }
h2 { font-size: 1.4rem; }
h3 { font-size: 1.15rem; }

p { margin: 0 0 1rem; }

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

li { margin-bottom: 0.25rem; }

code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.9em;
  background-color: var(--color-code-bg);
  padding: 0.15em 0.3em;
  border-radius: 3px;
}

pre {
  background-color: var(--color-code-bg);
  padding: 1rem;
  overflow-x: auto;
  border-radius: 4px;
  margin: 0 0 1rem;
}

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

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

blockquote {
  margin: 0 0 1rem;
  padding: 0.5rem 1rem;
  border-left: 3px solid var(--color-border);
  color: var(--color-text-muted);
}

footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1rem;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

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

.post-header h1 {
  margin-top: 0;
  margin-bottom: 0.25rem;
}

.post-header time {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.tags {
  list-style: none;
  padding: 0;
  display: flex;
  gap: 0.5rem;
  margin: 0.5rem 0 0;
}

.tags li {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  padding: 0.1em 0.5em;
  border-radius: 3px;
}

.post-footer {
  margin-top: 3rem;
}

.post-footer .license {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.cta {
  margin: 1.5rem 0;
  padding: 1rem;
  border: 1px solid var(--color-border);
  border-radius: 4px;
}

.cta h2 {
  font-size: 1.1rem;
  margin-top: 0;
}