/* ===== Blog List Page ===== */
.blog-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.blog-list-item {
  margin-bottom: 0.5em;
}

.blog-list-link {
  display: flex;
  gap: 1.2em;
  padding: 1.2em;
  border-radius: 8px;
  background: #f8fafc;
  border-left: 3px solid #e2e8f0;
  text-decoration: none !important;
  transition: border-color 0.2s, background 0.2s;
  align-items: flex-start;
}

.blog-list-link:hover {
  border-left-color: #667eea;
  background: #f1f5ff;
}

.blog-list-date {
  flex-shrink: 0;
  font-size: 0.82em;
  font-weight: 500;
  color: #718096;
  min-width: 5.5em;
  padding-top: 0.2em;
}

.blog-list-body {
  flex: 1;
}

.blog-list-title {
  font-size: 1.05em;
  font-weight: 600;
  color: #2d3748;
  margin: 0 0 0.3em;
  padding: 0;
  border: none;
}

.blog-list-link:hover .blog-list-title {
  color: #5a67d8;
}

.blog-list-desc {
  font-size: 0.9em;
  color: #718096;
  line-height: 1.6;
  margin: 0 0 0.4em;
}

.blog-list-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4em;
}

.blog-empty {
  text-align: center;
  padding: 3em 0;
  color: #a0aec0;
  font-size: 1.1em;
}

/* ===== Post Tags ===== */
.post-tag {
  display: inline-block;
  font-size: 0.78em;
  font-weight: 500;
  color: #5a67d8;
  background: #667eea12;
  padding: 0.15em 0.6em;
  border-radius: 12px;
  border: 1px solid #667eea25;
}

/* ===== Blog Post Article ===== */
.blog-post {
  background: #fff;
  border-radius: 12px;
  padding: 2.5em 2.5em;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06), 0 4px 12px rgba(0,0,0,0.04);
}

.post-header {
  margin-bottom: 2em;
  padding-bottom: 1.5em;
  border-bottom: 1px solid #edf2f7;
}

.post-title {
  font-size: 1.8em;
  font-weight: 700;
  color: #1a202c;
  line-height: 1.3;
  margin: 0 0 0.5em;
  border: none;
  padding: 0;
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 1em;
  flex-wrap: wrap;
}

.post-date {
  font-size: 0.9em;
  color: #718096;
}

.post-tags {
  display: flex;
  gap: 0.4em;
  flex-wrap: wrap;
}

/* ===== Post Content ===== */
.post-content {
  font-size: 1.02em;
  line-height: 1.85;
  color: #2d3748;
}

.post-content h2 {
  font-size: 1.4em;
  margin: 1.8em 0 0.6em;
}

.post-content h3 {
  font-size: 1.15em;
  margin: 1.5em 0 0.5em;
}

.post-content p {
  margin: 0 0 1.2em;
  color: #2d3748;
}

.post-content a {
  color: #5a67d8;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.post-content img {
  max-width: 100%;
  border-radius: 8px;
  margin: 1em 0;
}

.post-content blockquote {
  margin: 1.2em 0;
  padding: 0.8em 1.2em;
  border-left: 4px solid #667eea;
  background: #f8fafc;
  border-radius: 0 8px 8px 0;
  color: #4a5568;
}

.post-content blockquote p {
  margin: 0;
  color: #4a5568;
}

/* Code blocks */
.post-content code {
  font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
  font-size: 0.88em;
  background: #f1f5f9;
  padding: 0.15em 0.4em;
  border-radius: 4px;
  color: #e53e3e;
}

.post-content pre {
  margin: 1.2em 0;
  padding: 1.2em 1.5em;
  background: #1a202c;
  border-radius: 8px;
  overflow-x: auto;
  line-height: 1.6;
}

.post-content pre code {
  background: none;
  color: #e2e8f0;
  padding: 0;
  font-size: 0.88em;
}

/* Tables */
.post-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.2em 0;
  font-size: 0.92em;
}

.post-content th {
  background: #f8fafc;
  font-weight: 600;
  text-align: left;
  padding: 0.6em 0.8em;
  border-bottom: 2px solid #e2e8f0;
}

.post-content td {
  padding: 0.6em 0.8em;
  border-bottom: 1px solid #edf2f7;
  text-align: left;
}

/* Lists */
.post-content ul, .post-content ol {
  margin: 0 0 1.2em 1.5em;
  padding: 0;
}

.post-content li {
  margin-bottom: 0.4em;
}

/* Math (KaTeX/MathJax) */
.post-content .katex-display,
.post-content .MathJax_Display {
  overflow-x: auto;
  padding: 0.5em 0;
}

/* ===== Post Footer ===== */
.post-footer {
  margin-top: 2.5em;
  padding-top: 1.5em;
  border-top: 1px solid #edf2f7;
}

.back-link {
  font-size: 0.95em;
  font-weight: 500;
  color: #5a67d8;
  text-decoration: none;
  transition: color 0.2s;
}

.back-link:hover {
  color: #434190;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .blog-post {
    padding: 1.5em 1.2em;
  }

  .post-title {
    font-size: 1.4em;
  }

  .blog-list-link {
    flex-direction: column;
    gap: 0.3em;
  }
}