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

body {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.1rem;
  line-height: 1.7;
  color: #222;
  background: #fff;
  margin: 0;
  padding: 0;
}

header {
  padding: 1.5rem 2rem;
  border-bottom: 1px solid #e0e0e0;
}

.site-name {
  font-size: 1.2rem;
  font-weight: bold;
  text-decoration: none;
  color: #222;
}

main {
  max-width: 680px;
  margin: 2rem auto;
  padding: 0 1.5rem;
}

h1 {
  font-size: 1.8rem;
  line-height: 1.3;
  margin-bottom: 0.25rem;
}

.post-date {
  color: #888;
  font-size: 0.9rem;
  margin-top: 0;
  margin-bottom: 2rem;
}

.content img { max-width: 100%; }

.content pre {
  background: #f5f5f5;
  padding: 1rem;
  overflow-x: auto;
  border-radius: 4px;
}

.content code {
  font-family: "Courier New", monospace;
  font-size: 0.9em;
  background: #f5f5f5;
  padding: 0.1em 0.3em;
  border-radius: 3px;
}

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

/* Index page post list */
.post-list {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0;
}

.post-list li {
  display: flex;
  gap: 1rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid #f0f0f0;
}

.post-list .date {
  color: #888;
  font-size: 0.9rem;
  white-space: nowrap;
  flex-shrink: 0;
  padding-top: 0.15em;
  font-family: "Courier New", monospace;
}

.post-list a {
  color: #222;
  text-decoration: none;
}

.post-list a:hover { text-decoration: underline; }

/* Post navigation */
.post-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid #e0e0e0;
  font-size: 0.95rem;
}

.post-nav a { color: #444; text-decoration: none; }
.post-nav a:hover { text-decoration: underline; }

.back-link {
  margin-top: 1.5rem;
  font-size: 0.9rem;
}

.back-link a { color: #888; text-decoration: none; }
.back-link a:hover { text-decoration: underline; }

footer {
  max-width: 680px;
  margin: 3rem auto 2rem;
  padding: 1.5rem 1.5rem 0;
  border-top: 1px solid #e0e0e0;
  color: #aaa;
  font-size: 0.85rem;
}