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

body {
  font-family: system-ui, sans-serif;
  background: #fafafa;
  color: #222;
  line-height: 1.7;
}

a {
  color: #000;
  text-decoration: underline;
}

a:hover {
  text-decoration: underline;
}

/* Layout */
header {
  border-bottom: 1px solid #e0e0e0;
  padding: 0.75rem 0;
  margin-bottom: 1.5rem;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 0.5rem;
}

/* Header */
.site-title {
  font-size: 1.5rem;
  font-weight: normal;
  letter-spacing: -0.5px;
  text-decoration: underline;
}

.site-tagline {
  font-size: 0.9rem;
  color: #888;
  margin-top: 0.25rem;
}

/* Index — post list */
.post-list {
  list-style: none;
}

.post-list li {
  margin-bottom: 1.25rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid #eee;
}

.post-list li:last-child {
  border-bottom: none;
}

.post-title {
  font-size: 1.4rem;
  margin-bottom: 0.4rem;
}

.post-meta {
  font-size: 0.85rem;
  color: #888;
  margin-bottom: 0.75rem;
}

.post-excerpt {
  color: #444;
}

/* Post page */
.post-header {
  margin-bottom: 1rem;
}

.post-header h1 {
  font-size: 1.5rem;
  font-weight: normal;
  margin-bottom: 0.25rem;
}

.post-content p {
  margin-bottom: 0.75rem;
}

.post-content h2 {
  font-size: 1.35rem;
  font-weight: normal;
  margin: 1.25rem 0 0.5rem;
}

.post-content ul,
.post-content ol {
  margin: 0 0 1.25rem 1.5rem;
}

.post-content li {
  margin-bottom: 0.5rem;
}

.post-content blockquote {
  border-left: 3px solid #ccc;
  padding-left: 1rem;
  color: #555;
  margin: 1.5rem 0;
}

footer {
  border-top: 1px solid #e0e0e0;
  margin-top: 3rem;
  padding: 1rem 0;
  font-size: 0.85rem;
  color: #888;
}