body {
  font-family: Arial, sans-serif;
  background-color: #f4f4f4; 
  line-height: 1.6;
}
#main-title {
  color: darkred;
  border-bottom: 2px solid #000; 
}
.cool-list {
  background-color: #ffffff; 
  border: 1px solid #333; 
  padding: 15px;
}