div{
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 300px;
    text-align: center;
    border-radius: 20px;
    background-color: rgb(0, 170, 255);
    margin: calc(50vh - 15vh) auto;
}
body{
    background-color: rgb(0, 153, 255);
}
a{
    text-decoration: none;
    color: white;
    font-size: 20px;
    margin: 10px;
    background-color: rgb(0, 153, 255);
    padding: 10px 20px;
    border-radius: 10px;
}