body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  background: #fff;
  color: #222;
  margin: 0;
  padding: 0;
  transition: background 0.3s, color 0.3s;
  line-height: 1.6;
}

body.dark {
  background: #181818;
  color: #eee;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 700px;
  margin: 1.5rem auto 1rem auto;
  padding: 0 1rem;
}

h1 {
  font-size: 1.5rem;
  font-weight: 500;
  margin: 0;
  letter-spacing: -0.5px;
}

#mode-toggle {
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  color: inherit;
  transition: color 0.3s;
  padding: 0;
  opacity: 0.8;
}

#mode-toggle:hover {
  opacity: 1;
}

main {
  max-width: 700px;
  margin: 0 auto;
  padding: 0 1rem;
}

section#blog-posts {
  margin-top: 2rem;
}

.year {
  display: block;
  font-size: 1rem;
  font-weight: 500;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  color: #666;
}

body.dark .year {
  color: #999;
}

ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

li {
  margin-bottom: 0.8rem;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s;
  font-size: 0.95rem;
}

a:hover {
  color: #0070f3;
}

footer {
  text-align: center;
  margin: 4rem 0 1rem 0;
  color: #888;
  font-size: 0.8rem;
}