img { 
    max-width: 48%;
    border-radius: 10px;
    border: 5px solid black;
}
img:hover {
  box-shadow: 0 0 10px 10px lightblue;
}

body {background-color: forestgreen}

table, td, tr {
    font-size: 30px;
    border: 2px solid black;
    text-align: center;
    margin-left: auto;
    margin-right: auto;
}
header {
    background-color: darkseagreen;
    font-size: 20px;
    padding: 10px
}
header a:hover {
    background-color: lightblue;
    padding: 10px;
    
}
body {
    margin: 0px;
}
h2 {
    font-size: 10px;
}
header a{
    text-decoration: none;
}