html, body {
    padding: 0;
    margin: 0;
    font-size: 1.2rem;
}

header {
    background-color: darkolivegreen;
    padding: 10px;
}
h1 {
 color: white;
}

main {
    padding: 20px;
}

.objectifs li {
    margin-bottom: 15px;
}

span.number {
    font-size: 2rem;
    color: darkolivegreen;
}

footer {
    background-color: azure;
    padding: 0px 20px;
}