header
{
    display: flex;
    justify-content: center;
    background-color: white;
    padding: 1em;
    margin: 0 -5px;
}
img
{
    margin-right: auto;
}
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: lightgrey;
    margin: 20em;
    margin-top : 5em;
    margin-bottom: 5em;
    border-radius: 0.5em;
}
article
{
    text-align: center;
}
.list a
{
    background-color: white;
    padding-top:1em;
    padding-bottom: 1em;
    border-radius: 0.5em;
}
.list{
    display: grid;
    grid-template-columns: repeat(2,1fr);
    gap: 1em;
    padding: 1em;
}
footer{
    margin-top: auto;
}
#Puissance4Board{
    display: grid;
    grid-template-columns: (6,7);
    gap: 1em;
    padding: 1em;
}
.one{
    grid-column: 1;
    grid-row: 1;
}
.two{
    grid-column: 1;
    grid-row: 1;
}
.three{
    grid-column: 1;
    grid-row: 1;
}
.four{
    grid-column: 1;
    grid-row: 1;
}
.five{
    grid-column: 1;
    grid-row: 1;
}
.six{
    grid-column: 1;
    grid-row: 1;
}