body {
  font-family: 'Arial', sans-serif;
  background-color: #f4f4f4;
  color: #333;
  margin: 0;
  padding: 20px;
}
h1 {
  color: #2c3e50;
  text-align: center;
}
h2 {
  color: #27ae60;
}
.step {
  background-color: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  margin: 20px 0;
  padding: 20px;
}
.step-header {
  display: flex;
  align-items: center;
}
.step-number {
  background-color: #27ae60;
  color: #fff;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 10px;
  font-size: 20px;
}
.step-content {
  margin-top: 10px;
}
.step-content p {
  margin: 10px 0;
}
.step-content ul {
  margin: 10px 0;
  padding-left: 20px;
}
.step-content li {
  margin: 5px 0;
}
.highlight {
  background-color: #ecf0f1;
  border-left: 4px solid #27ae60;
  padding: 10px;
  margin: 10px 0;
}
.problem, .solution {
  background-color: #fdf2e9;
  border-left: 4px solid #e67e22;
  padding: 10px;
  margin: 10px 0;
}
.solution {
  border-color: #3498db;
}