.elements-centrer {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 6rem;
}

.livre-complet {
    display: block;
    width: clamp(280px, 40vw, 800px);
    margin: 5rem auto;
    box-shadow: var(--shadow);
}

.texte-centrer {
    max-width: 85%;
    margin: 0 auto;
    padding-bottom: 5rem;
}

.exraits-livre {
    margin: 0 auto; 
    max-width: 85%;
}

hr {
    border: none;
    height: 2px;
    background: linear-gradient(
        to right,
        transparent,
        #cfcfcf,
        transparent
    );
    box-shadow: 0 2px 3px rgba(0, 0, 0, 0.1);
    margin: 50px 0;
    max-width: 80%;
    margin: 5rem auto;
}