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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 18px;
  line-height: 1.7;
  color: #111;
  background: #fff;
  max-width: 640px;
  margin: 0 auto;
  padding: 0 20px;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 40px 0 60px;
}

.site-title {
  font-weight: 600;
  font-size: 18px;
  text-decoration: none;
  color: #111;
}

nav a {
  margin-left: 24px;
  text-decoration: none;
  color: #555;
  font-size: 16px;
}

nav a:hover { color: #111; }

main { padding-bottom: 80px; }

h1 { font-size: 24px; font-weight: 600; margin-bottom: 8px; }
h2 { font-size: 20px; font-weight: 600; margin: 32px 0 8px; }

p { margin-bottom: 20px; }

a { color: #111; }

.post-list { list-style: none; }
.post-list li { margin-bottom: 32px; }
.post-date { color: #888; font-size: 14px; }
.post-title { font-size: 18px; font-weight: 500; }