* {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background-color: #e9e9e9;
}
h2{
    display: flex;
    align-items: center;
    justify-content: center;

}
div {
    display: block;
    flex-wrap: wrap;
    flex-direction: row;
}

a {
    display: block;
    text-align: center;
    padding: 15px;
    background-color: #e9e9e9;
    border: 1px solid black;
    border-radius: 10px;
    color: #000000;
    text-decoration: none;
    font-weight: 600;
    margin: 5px;
}
a:hover {
    display: block;
    text-align: center;
    padding: 15px;
    background-color: #000000;
    border: 1px solid #000000;
    border-radius: 10px;
    color: #ffffff;
    text-decoration: none;
    font-weight: 600;
    margin: 5px;
}