body {
    margin: 0;
    background-color: #f6f5fb;
    font-family: Poppins, Arial, sans-serif;
    font-weight: 400;
    color: #354052;
    text-align: center;
}
nav {
    background-color: #fff;
    margin-bottom: 2.5em;
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    padding: 1.2em 1.8em;
    padding-bottom: 0;
}
nav p {
    margin-left: 1em;
    margin-right: 1em;
    margin-top: 0.5em;
}
.main {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-evenly;
    height: 80vh;
}
.titre {
    margin: 0;
    background-color: #ffabab;
    display: block;
    width: 100%;
    box-sizing: border-box;
    align-self: stretch;
    font-size: 1.8em;
    font-weight: 700;
    border-radius: 10px;
    padding: 1.6em;
}
.maintenance {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content:center;
}
.signature {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-top: 0.3em;
}
.signature #spna {
    margin-top: 1em;
    font-weight: 600;
    font-size: 1.2em;
}

@media (min-width: 320px) {
    /* Téléphones et tablettes */
    #tribu {
        max-height: 32px;
        margin-bottom: 13px;
        margin-left: 5px;
    }
    #spna {
        max-height: 45px;
    }
    body {
        font-size: 1.1em;
    }
    .main {
        margin: 0 12%;
        justify-content: start;
    }
    .maintenance {
        margin: 0 10% 7em;
    }
    #img-maintenance {
        max-height: 34vh;
    }
}

@media (min-width: 1025px) {
    /* PC */
    #tribu {
        max-height: 62px;
        margin-bottom: 17px;
        margin-top: 1px;
        margin-left: 10px;
    }
    #spna {
        max-height: 80px;
    }
    body {
        font-size: 1.2em;
    }
    .main {
        margin: 0 18%;
        justify-content: space-evenly;
    }
    .maintenance {
        margin: 0 8.5% 7em;
    }
    #img-maintenance {
        max-height: 40vh;
    }
}