article {
  line-height: 1.8;
  max-width: 900px;
  margin: 0 auto;
  padding: 40px 20px;
  background-color: #ffffff;
  color: #2c3e50;
}

h1 {
  color: #2c3e50;
  font-size: 2.5em;
  margin-bottom: 10px;
  border-bottom: 3px solid #0066CC;
  padding-bottom: 15px;
}

h2 {
  color: #2c3e50;
  font-size: 1.8em;
  margin-top: 50px;
  margin-bottom: 20px;
  border-left: 4px solid #0066CC;
  padding-left: 15px;
}

h3 {
  color: #0066CC;
  font-size: 1.3em;
  margin-top: 30px;
  margin-bottom: 15px;
}

.subtitle {
  font-size: 1.2em;
  color: #555;
  font-style: italic;
  margin-bottom: 30px;
}

.author-date {
  color: #888;
  font-size: 0.9em;
  margin-bottom: 40px;
  font-style: italic;
}

img {
  max-width: 100%;
  height: auto;
  margin: 30px 0;
  border-radius: 4px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.callout {
  background: #E8F4F9;
  color: #2c3e50;
  padding: 25px;
  border-radius: 4px;
  margin: 30px 0;
  border-left: 4px solid #0066CC;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.insight {
  background: #FFF5E6;
  color: #2c3e50;
  padding: 25px;
  border-radius: 4px;
  margin: 30px 0;
  border-left: 4px solid #FF6B35;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.fact {
  background: #F5F5F5;
  color: #2c3e50;
  padding: 25px;
  border-radius: 4px;
  margin: 30px 0;
  border-left: 4px solid #999999;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

ul,
ol {
  margin: 20px 0;
  padding-left: 30px;
}

li {
  margin: 10px 0;
}

strong {
  color: #2c3e50;
  font-weight: 600;
}

a {
  color: #0066CC;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 25px 0;
}

th,
td {
  padding: 12px;
  text-align: left;
  border-bottom: 1px solid #ddd;
}

th {
  background-color: #0066CC;
  color: white;
  font-weight: 600;
}

tr:hover {
  background-color: #f5f5f5;
}