html, body {
    background-color: black;
    height: 99%;
}

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

a {
    display: flex;
    flex-direction: column;
    align-items: center;
    background-color: white;
    border: 2px solid whitesmoke;
    border-radius: 15px;
    padding: 5px;
    overflow: hidden;
    text-decoration: none;
    color: black;
    font-size: large;
}