* {
    box-sizing: border-box;
}

body {
    background-image: url('../img/introduction.png');
    background-position: top;
    font: 1.0em sans-serif;
    display: flex;
    flex-flow: column wrap;
    background-repeat: no-repeat;
    background-size: cover;
}

section {
    width: 97%;
    margin-top: 2%;
    margin-left: 1.5%;
    border: orange;
}

h1 {
    text-align: center;
    border: solid orange;
    padding: 2%;
    margin-bottom: 2%;
    margin-top: 0%;
    width: 100%;
    background-color: orange;
    color: white;
}

p {
    margin-right: 55%;
    margin-left: 5%;
    margin-top: 3em;
    background-color: white;
    padding: 2%;
    border-radius: 10px;
    font-size: large;
}

.droite {
    margin-right: 20%;
}

.gauche {
    font-size: 90%;
    margin-left: 5%;
}

.container {
    display: flex;
}

li {
    display: inline-block;
    padding: 2%;
    margin-right: 5%;
    padding-right: 5%;
    margin-top: 50%;
    color: white;
}

[href*=".html"] {
    color: black;
    text-decoration: none;
}

[href*=".html"]:hover {
    color: #EC9400;
}