.my-class-1 {
  background-color: #f2f2f2;
  color: #333333;
  font-size: 16px;
}
.my-class-2 {
  border: 1px solid #f2f2f2;
  font-family: Arial, sans-serif;
}
.my-class-3 {
  color: #007bff;
  font-size: 1.5rem;
}
.my-class-4 {
  text-align: center;
}
.my-class-5 {
  margin: 10px;
  padding: 5px;
}