body {
    font-family: sans-serif;
    margin: 0;
}

img {
    max-height: 250px;
}

h1 {
    text-align: center;
    color: red;
}

h2 {
  color: blue;
}

h2::first-letter {
    color: red;
}

.conteneur {
    margin-left: 100px;
    margin-right: 100px;
}

.couleur {
    background-color: lightgrey;
    padding-top: 50px;
    padding-bottom: 50px;
}

ul {
    list-style-type: none;
    display: inline-block;
}

li {
    display: inline;
    padding-right: 40px;
}

table, td, th {
    border: 1px solid black;
    border-collapse: collapse;
    padding: 15px 15px 15px 15px;
}

footer {
    padding: 25px 25px;
    margin-top: 20px;
    background-color: darkblue;
    color: white;
    text-align: center;
}