* {
    margin: 0; padding: 0; border: 0; box-sizing: border-box;
}

body {
    background-color: rgb(22, 101, 107);
}

header {
    text-align: center;
    border: 15px groove rgb(202, 87, 45);
}

div.gallery {
    margin: 5px;
    border: 1px solid #ccc;
    float: left;
    width: 99vw;
  }
  
  div.gallery:hover {
    border: 1px solid #777;
  }
  
  div.gallery img {
    width: 100%;
    height: auto;
  }
  
  div.desc {
    padding: 15px;
    text-align: center;
    color: lightgray
  }

     /* unvisited link */
a:link {
    color: red;
  }
  
  /* visited link */
  a:visited {
    color: green;
  }
  
  /* mouse over link */
  a:hover {
    color: hotpink;
  }
  
  /* selected link */
  a:active {
    color: blue;
  }