* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  line-height: 1.65;
  font-size: 16px;
  color: #0f172a;
  background: #f6f7fb;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: 10px;
  margin: 16px 0;
}

.site-header {
  background: #0f172a;
  color: white;
  padding: 22px 18px;
  border-bottom: 4px solid #1d4ed8;
}

.site-header h1 {
  margin: 0;
  font-size: 30px;
}

.topic {
  margin: 10px 0 0 0;
  opacity: 0.92;
  max-width: 900px;
}

.nav {
  margin-top: 14px;
}

.nav a {
  color: white;
  text-decoration: none;
  margin-right: 14px;
  font-weight: bold;
  padding: 8px 10px;
  border-radius: 8px;
  display: inline-block;
}

.nav a:hover {
  background: rgba(255, 255, 255, 0.12);
}

.container {
  max-width: 900px;
  margin: 28px auto;
  padding: 26px;
  background: white;
  border-radius: 14px;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
}

.container h2 {
  margin-top: 0;
  font-size: 24px;
}

.container h3 {
  font-size: 20px;
  margin-top: 24px;
}

.container p {
  margin: 0 0 14px 0;
}

.post-list {
  list-style: none;
  padding-left: 0;
  margin: 14px 0 0 0;
}

.post-list li {
  padding: 14px 0;
  border-bottom: 1px solid #e5e7eb;
}

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

.post-list a {
  text-decoration: none;
  font-size: 18px;
  color: #1d4ed8;
  font-weight: 700;
}

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

.post-date {
  display: block;
  margin-top: 6px;
  color: #475569;
  font-size: 14px;
}

.post-date-page {
  color: #475569;
  font-style: italic;
  margin-bottom: 18px;
}

.image-caption {
  margin-top: -6px;
  margin-bottom: 18px;
  color: #475569;
  font-size: 14px;
  font-style: italic;
}

.section-divider {
  border: none;
  border-top: 1px solid #e5e7eb;
  margin: 26px 0;
}

.featured-card {
  background: #f8fafc;
  border: 1px solid #e5e7eb;
  border-left: 6px solid #1d4ed8;
  border-radius: 14px;
  padding: 18px;
  margin-top: 14px;
}

.featured-card h3 {
  margin: 8px 0 6px 0;
  font-size: 20px;
}

.featured-card h3 a {
  color: #0f172a;
  text-decoration: none;
}

.featured-card h3 a:hover {
  text-decoration: underline;
}

.featured-meta {
  margin: 0 0 10px 0;
  color: #475569;
  font-size: 14px;
}

.featured-link {
  display: inline-block;
  margin-top: 8px;
  font-weight: 700;
  color: #1d4ed8;
  text-decoration: none;
}

.featured-link:hover {
  text-decoration: underline;
}

.post-tag {
  display: inline-block;
  background: #dbeafe;
  color: #1e3a8a;
  font-size: 12px;
  font-weight: bold;
  padding: 4px 8px;
  border-radius: 999px;
}

.site-footer {
  text-align: center;
  padding: 18px;
  color: #64748b;
}