.card {
    display: grid;
    background-color: #333;
    padding: 20px;
    height: 200px;
    width: 60%;
    margin: auto;
    border-radius: 15px;
}

.titre {
    color: white;
    text-align: center;
}

button {
    color: white;
    background-color: dodgerblue;
    border-radius: 10px;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 20px;
}

button:hover {
    background-color: cadetblue;
}

@media (max-width:780px) {
    .card {
        height: 300px;
        width: 90%;
    }

    button {
        color: white;
        background-color: dodgerblue;
        border-radius: 10px;
        font-family: Arial, Helvetica, sans-serif;
        font-size: 30px;
    }

    .titre {
        color: white;
        text-align: center;
        font-family: Arial, Helvetica, sans-serif;
        font-size: 30px;
    }
}