header
{
    display: flex;
    justify-content: center;
    background-color: white;
    padding: 1em;
    margin: 0 -5px;
}
body
{
    display: flex;
    flex-direction: column;
    background-color: #17a2b8;
    margin: 0%;
    padding: 0%;
    min-height: 100vh;
}
a
{
    text-decoration: none;
    color: grey;
    font-size: 1.2em;
    margin: 0 5px;
}
section
{
    padding-top: 3em;
    padding-bottom: 3em;
    background-color: white;
    margin: 20em;
    margin-top : 5em;
    margin-bottom: 5em;
    border-radius: 0.5em;
}
footer{
    margin-top: auto;
}
td {
    color: #000088;
    text-align: center;
    margin-top: 14px;
    height: 6em;
    letter-spacing: 1px;
    border: 3px #17a2b8 inset;
    background-color: white;
    width: 6em;
    border-radius: 100%;
  }
  #Board{
    border: 3px #17a2b8 outset;
    border-radius: 2%;
    background-color: #17a2b8;
    margin: auto;
    padding: 0.5em;
  }