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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.7;
  color: #333;
  background: #f5f5f5;
}

.site-header {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #fff;
  padding: 16px 0;
}

.header-inner {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 20px;
}

.logo {
  color: #fff;
  text-decoration: none;
  font-size: 18px;
  font-weight: 600;
}

.logo:hover {
  opacity: 0.9;
}

.article-wrapper {
  max-width: 800px;
  margin: 30px auto;
  padding: 0 20px;
}

.article {
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  padding: 40px;
}

.article h1 {
  font-size: 28px;
  line-height: 1.3;
  margin-bottom: 24px;
  color: #1a1a1a;
}

.article h2 {
  font-size: 22px;
  margin-top: 32px;
  margin-bottom: 14px;
  color: #1a1a1a;
}

.article h3 {
  font-size: 18px;
  margin-top: 24px;
  margin-bottom: 10px;
  color: #333;
}

.article p {
  margin-bottom: 16px;
  font-size: 16px;
}

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

.article li {
  margin-bottom: 6px;
  font-size: 16px;
}

.article strong {
  color: #667eea;
  font-weight: 600;
}

.site-footer {
  margin-top: 40px;
  padding: 20px 0;
  text-align: center;
  color: #888;
  font-size: 13px;
}

.footer-inner {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 20px;
}

.articles-list {
  list-style: none;
  margin-left: 0;
  padding: 0;
}

.articles-list li {
  padding: 10px 0;
  border-bottom: 1px solid #eee;
}

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

.articles-list a {
  color: #667eea;
  text-decoration: none;
  font-size: 16px;
}

.articles-list a:hover {
  text-decoration: underline;
  color: #764ba2;
}

@media (max-width: 768px) {
  .article {
    padding: 24px 18px;
    border-radius: 8px;
  }

  .article h1 {
    font-size: 24px;
  }

  .article h2 {
    font-size: 20px;
  }
}