:root {
  --primary-color: #2c3e50;
  --accent-color: #d4af37;
  --text-color: #333;
  --light-gray: #f5f6fa;
  --card-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  --hover-shadow: 0 8px 15px rgba(0, 0, 0, 0.2);
  --transition: all 0.3s ease;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--light-gray);
}

header {
  background-color: white;
  padding: 1.5rem 0;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 0;
  z-index: 100;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 2rem;
}

.main-nav {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.back-link {
  display: inline-flex;
  align-items: center;
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
  padding: 0.5rem 1rem;
  border-radius: 6px;
  background-color: var(--light-gray);
  border: 1px solid transparent;
}

.back-link:hover {
  color: var(--accent-color);
  background-color: white;
  border-color: var(--accent-color);
  transform: translateY(-2px);
  box-shadow: var(--card-shadow);
}

.article-header {
  text-align: center;
  margin: 3rem 0;
}

.article-header h1 {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: 1rem;
  line-height: 1.3;
}

.article-meta {
  color: #666;
  font-size: 0.9rem;
  margin-bottom: 2rem;
}

.article-content {
  background: white;
  padding: 3rem;
  border-radius: 12px;
  box-shadow: var(--card-shadow);
  margin-bottom: 3rem;
}

.article-content p {
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
  color: #333;
}

.article-content h2, .article-content h3 {
  font-size: 1.8rem;
  color: var(--primary-color);
  margin: 2.5rem 0 1.5rem;
}

blockquote {
  border-left: 3px solid var(--accent-color);
  padding-left: 1.2rem;
  margin: 2rem 0;
  font-style: italic;
  color: #555;
}

.signature {
  font-style: italic;
  text-align: right;
  margin-top: 2rem;
  color: #666;
}

footer {
  text-align: center;
  padding: 2rem;
  background: white;
  color: #666;
  margin-top: 4rem;
  box-shadow: 0 -2px 4px rgba(0, 0, 0, 0.1);
}

/* Blog listing specific styles */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  padding: 2rem 0;
}

.blog-card {
  background: white;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--card-shadow);
  transition: var(--transition);
  position: relative;
  display: flex;
  flex-direction: column;
}

.blog-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--hover-shadow);
}

.blog-card h3 {
  font-size: 1.5rem;
  color: var(--primary-color);
  margin-bottom: 1rem;
  padding: 1.5rem 1.5rem 0.5rem;
  line-height: 1.3;
}

.date {
  color: #666;
  font-size: 0.9rem;
  padding: 0 1.5rem;
  margin-bottom: 1rem;
}

.abstract {
  padding: 0 1.5rem;
  color: #555;
  font-size: 1rem;
  line-height: 1.6;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.read-more {
  display: inline-block;
  padding: 1rem 1.5rem;
  background: var(--primary-color);
  color: white;
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
  margin-top: auto;
  text-align: center;
}

.read-more:hover {
  background: var(--accent-color);
}

.blog-section {
  margin-bottom: 4rem;
}

.section-title {
  font-size: 2rem;
  color: var(--primary-color);
  margin-bottom: 2rem;
  text-align: center;
  font-weight: 600;
}

@media (max-width: 768px) {
  .container {
    padding: 0 1rem;
  }

  .article-content {
    padding: 2rem;
  }

  .article-header h1 {
    font-size: 2rem;
  }

  .blog-grid {
    grid-template-columns: 1fr;
    padding: 1rem;
  }
}