styles.css

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    padding: 0;
    margin: 0;
}
ul {
    margin: 0;
    padding: 0;
}
li {
    list-style-type: none;
}
h1 {
    text-transform: uppercase;
    text-align: center;
    font-size: x-large;
}
h2 {
    text-transform: uppercase;
    text-align: center;
}

a {
    text-decoration: none;
    color: black;
}
 /* ********************* NAVBAR ***********************  */
nav {
    overflow: hidden;
    background-color: rgba(130, 218, 218, 0.273);
    position: fixed;
 }
 header li {
     float: left;
     font-size: 1.2em;
 }
header li a {
    text-decoration: none;
    display: block;
    text-align: right;
    padding: 18px 16px;
}
#logo {
    font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
    text-align: left;
}
/* ********************* principle image ****************** */
#imagePrincipale {
    padding-top: 60px;
    background: url(../72d2f104dedf26594067b0dfd0f04f8b.png) no-repeat fixed 50% 50%;
    background-size: cover;
    height: 799px;
}
h1 {
    font-family:'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
    text-align: center;
    color: midnightblue;
    font-size: 10ex;
    text-shadow: 1px 3px 2px black;
}

#premierTrait {
    height: 1px;
    width: 60%;
    margin: -3px auto;
    background-color: blue;
    text-shadow: 1px 3px 2px black;
}

h4 {
    text-align: center;
    color: aquamarine;
    text-shadow: 1px 3px 2px black;
}
p {
    text-align: center;
    color: aquamarine;
    font-size: 3em;
    text-shadow: 1px 3px 2px black;
}
/* ***************** PRESENATION **************** */
#alternativeLinks {
    background-color: cornflowerblue;
    padding: 10px 0px 100px 0;
}