html,
body {
    width: 100%;
    height: 100%;
    margin: 0;
    background: #000;
}

body {
    display: flex;
    align-items: center;
    justify-content: center;
}

.maze {
    display: grid;
    grid-template-columns: repeat(4, 44px);
    grid-template-rows: repeat(4, 44px);
    gap: 6px;
    place-items: center;
}

.maze a,
.maze a:visited,
.maze a:hover {
    color: #fff;
    font-family: Arial, sans-serif;
    font-size: 18px;
    line-height: 1;
    text-decoration: none;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}