html {
    height: 100%;
    display: grid;
    place-items: center;
    transition: all 300ms;
}

body {
    background-image: url("newbackground.svg");
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    background-attachment: fixed;
    font-family: 'Helvetica';
    font-size: 22px;
    font-style: normal;
}

h1,
h2 {
    text-align: center;
    font-family: 'Helvetica';
    font-style: normal;
    font-weight: 400;
}

button {
    width: 300px;
    padding: 20px;
    height: 150px;
    font-size: 20px;
    font-weight: 700;
    cursor: pointer;
    margin-bottom: 25px;
}

.classique {

    transition: all 300ms;
    color: black;
    background: rgba(0, 0, 0, 0.09);
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    backdrop-filter: blur(7.5px);
    -webkit-backdrop-filter: blur(7.5px);
    border-radius: 100px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    font-weight: 500;
}

.classique:hover {
    background: rgba(0, 0, 0, 0.17);
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    backdrop-filter: blur(11.5px);
    -webkit-backdrop-filter: blur(11.5px);
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 40px;
    scale: 110%;
    color: white;
}

.titre {
    padding-left: 10px;
    padding-right: 10px;
    margin-bottom: 40px;
    border-radius: 10px;
    transition: all 300ms;
    background: rgba(0, 0, 0, 0.3);
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    width: 350px;
    font-size: 20px;
    font-weight: 700;
    color: white;
}

.titre:hover {
    border-radius: 40px;
    width: 300px;
}