.center{
    color: aqua;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.texte{
    text-align: center;
}

.button {
    border-width:4px;
    border-style:ridge;
    border-color:aqua;
    border-radius : 15px;
    width: 100px;

    color: aqua;
    padding: 15px 32px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
}