/* columnpage.css */
.column-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding: 20px;
  max-width: 800px;
  margin: 0 auto;
}

.column-card {
  border: 1px solid #ccc;
  padding: 15px;
  border-radius: 6px;
  background: #f9f9f9;
}

.column-card h3 {
  margin-bottom: 10px;
  font-size: 18px;
  color: #333;
}

.column-card p {
  font-size: 14px;
  color: #666;
}

.column-article {
  max-width: 800px;
  margin: 20px auto;
  padding: 20px;
  background: none;
  border: none;
  border-radius: 0;
}

body, html, section {
  margin: 0;
  padding: 0;
}