body{
    background-color: lavender;
    font-family: 'Roboto Mono', monospace;
}

img{
    border: 3px red solid;
    border-radius: 10px;
    clear:both;
    height: 30%;
}

.titre-principal{
    font-family: 'Roboto Mono', monospace;
    font-size: 40px;
    color: firebrick;
    text-decoration: underline;
    text-align: center;
}

.titre{
    font-family: 'Roboto Mono', monospace;
    font-size: 20px;
    text-decoration: underline;
}

.num{
    font-family: 'Roboto Mono', monospace;
    font-size: 15px;
}

.lien{
    font-family: 'Roboto Mono', monospace;
    font-size: 15px;
    text-decoration: none;
    color: black;
}

.lien:hover{
    font-family: 'Roboto Mono', monospace;
    font-size: 15px;
    text-decoration: none;
    color: black;
    background-color: lightgreen;
    transition: 0.5s;
}