.cv img {
    width: 100%;
    height: 100%;
    /* Même si vous ne connaissez pas cette propriété, vous en aurez besoin pour permettre aux images de respecter les dimensions de la grid CSS */
    object-fit: cover;
    border-radius: 10px;
    transition: transform .4s;
}

h1 {
    text-align: center;
    margin-top: 80px;
}

h3 {
    font-size: 5em;
    top: 20%;
    left: 28%;
    right: 5%;
    bottom: 65%;
}

.cv {
    object-fit: cover;
    display: flex;
    flex-direction: row;
    justify-content: space-around;
    height: 900px;
}

.lien-conteneur-photo img {
    position: relative;
    transition: transform .4s;
    border-radius: 10px;
}

/*
.photo-hover {
    position: absolute;
    top: 0;
    left : 0;
    right:0;
    bottom: 0;
    align-items: center;
    justify-content: center; 
    background-color: silver;
    font-size : 1.5em;
    color : white;
    opacity: 0.5;
    display: none;
}
*/
.lien-conteneur-photo:hover .photo-hover {
    display: flex;
}

.lien-conteneur-photo img:hover {
    transform: scale(1.05);
}

@media screen and (max-width: 1400px) {
    .cv {
        display: flex;
        flex-direction: column;
        margin: auto;
        grid-gap: 15px;
        max-width: 100%;
        height: auto;
    }

    h1 {
        margin-bottom: 0;
    }

    section {
        padding: 50px 20px 50px 20px;
    }

    h3 {
        left: 10px;
        font-size: 2em;
    }
}