body {
    text-align: center;
    background-color: gray;
}

#board {
    background-color: black;
    border-top: 5px solid skyblue;
    border-left: 5px solid skyblue;
    border-right: 5px solid skyblue;
}

.back-to-home {
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: bold;
    color: white;
    margin: 10px 5px;
}

.back-to-home:is(:hover, :focus) {
    color: black;
}