body {
    background-color: skyblue;
  }
  img {
    border: 1px solid #ddd;
    border-radius: 4px;
    padding: 5px;
    width: 150px;
  }
  
  img:hover {
    box-shadow: 0 0 2px 1px rgba(0, 140, 186, 0.5);
  }
  .main {
    margin-left: 10%;
    margin-right: 10%;
  }