:root {
  --bg-color: #ffffff;
  --text-color: #333333;
  --meta-color: #666666;
  --border-color: #eeeeee;
  --accent-color: #0066cc;
  --tag-bg: #f0f0f0;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.7;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 40px 20px;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 40px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

.site-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-color);
  text-decoration: none;
}

nav a {
  color: var(--meta-color);
  text-decoration: none;
  font-size: 0.95rem;
}

nav a:hover {
  color: var(--accent-color);
}

.tags {
  margin-bottom: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  display: inline-block;
  padding: 4px 10px;
  font-size: 0.8rem;
  color: var(--meta-color);
  background-color: var(--tag-bg);
  border-radius: 4px;
  cursor: pointer;
  text-decoration: none;
  transition: background-color 0.2s;
}

.tag:hover,
.tag.active {
  background-color: var(--accent-color);
  color: #fff;
}

.post-list {
  list-style: none;
}

.post-item {
  padding: 20px 0;
  border-bottom: 1px solid var(--border-color);
}

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

.post-item a {
  color: var(--text-color);
  text-decoration: none;
}

.post-item a:hover {
  color: var(--accent-color);
}

.post-title {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.post-meta {
  font-size: 0.85rem;
  color: var(--meta-color);
  margin-bottom: 8px;
}

.post-summary {
  font-size: 0.95rem;
  color: var(--meta-color);
}

article {
  margin-top: 10px;
}

article h1,
article h2,
article h3,
article h4,
article h5,
article h6 {
  margin-top: 28px;
  margin-bottom: 14px;
  font-weight: 600;
  line-height: 1.4;
}

article h1 { font-size: 1.6rem; }
article h2 { font-size: 1.4rem; }
article h3 { font-size: 1.2rem; }

article p {
  margin-bottom: 16px;
}

article ul,
article ol {
  margin-bottom: 16px;
  padding-left: 24px;
}

article li {
  margin-bottom: 6px;
}

article a {
  color: var(--accent-color);
  text-decoration: none;
}

article a:hover {
  text-decoration: underline;
}

article code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  background-color: var(--tag-bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
}

article pre {
  background-color: #f6f8fa;
  padding: 16px;
  border-radius: 6px;
  overflow-x: auto;
  margin-bottom: 16px;
}

article pre code {
  background-color: transparent;
  padding: 0;
  font-size: 0.9em;
}

article blockquote {
  border-left: 4px solid var(--border-color);
  padding-left: 16px;
  color: var(--meta-color);
  margin-bottom: 16px;
}

.post-header {
  margin-bottom: 30px;
}

.post-header h1 {
  margin-top: 0;
  margin-bottom: 10px;
  font-size: 1.8rem;
}

footer {
  margin-top: 60px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
  text-align: center;
  font-size: 0.85rem;
  color: var(--meta-color);
}

@media (max-width: 600px) {
  .container {
    padding: 24px 16px;
  }

  header {
    margin-bottom: 28px;
  }
}