div {
    background-color: skyblue;
    margin: 3rem;
    border: 5px solid blue;
    border-radius: 10px;
    padding: 10px;
}
a{
 
    margin: 50px;
    border: 2px solid blue;
    padding: 5px;   
}
a:hover{
     background-color: lightcyan;
}

table, th, td {
    border: 3px solid blue;
    background color: lightskyblue;
}
table{
    width: 100%;
}
th{
    height: 50px;
}
td{
    padding: 1px;
}