:root {
  --muted: #666;
  --code-bg: #1e1e1e;
}

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    Roboto, Oxygen, Ubuntu, Cantarell, "Helvetica Neue", Arial, sans-serif;
  font-size: 1.05rem;
  line-height: 1.6;
  color: #111;
  background: #fff;
}

header {
  border-bottom: 1px solid #e0e0e0;
  margin-bottom: 0.75rem;
}

header nav {
  max-width: 720px;
  margin: 0 auto;
  padding: 0.75rem 1.25rem;
  display: flex;
  gap: 1.5rem;
}

header nav a {
  text-decoration: none;
  color: #111;
  font-size: 0.95rem;
  transition: opacity 0.2s;
}

header nav a:hover {
  opacity: 0.6;
}

main {
  max-width: 720px;
  margin: 1rem auto 3rem;
  padding: 0 1.25rem;
}

h1 {
  font-size: 2.2rem;
  margin: 0 0 1rem;
  line-height: 1.25;
}

h2 {
  font-size: 1.6rem;
  margin: 1rem 0 0.5rem;
}

h3 {
  font-size: 1.25rem;
  margin: 2.5rem 0 1rem;
}

p {
  margin: 0.75rem 0;
}

ul {
  margin: 1.25rem 0;
  padding-left: 1.5rem;
}

li {
  margin: 0.5rem 0;
}

a {
  color: inherit;
  text-decoration: underline;
}

a:hover {
  opacity: 0.85;
}

pre {
  margin: 1.75rem 0;
  padding: 1.1rem 1.3rem;
  background: #1e1e1e;
  color: #e6e6e6;
  border-radius: 8px;
  overflow-x: auto;
  font-size: 0.95rem;
  line-height: 1.55;
}

.post-list {
  list-style: none;
  padding: 0;
  margin: 2rem 0;
}

.post-list li {
  display: flex;
  gap: 0.9rem;
  margin-bottom: 0.6rem;
}

.post-list time {
  min-width: 6.2rem;
  color: #666;
  font-size: 0.9rem;
}