body {
    background: url('https://source.unsplash.com/random');
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center middle;
    background-attachment: fixed;
}
.navbar {
    height: 56px;
}
.nav-right {
    position: absolute;
    right: 50px;
}
nav h3 {
    color: #FFFFFF;
    font-weight: 300;
    text-transform: uppercase;
    position: relative;
    top: 3px;
}
h1 {
    margin-bottom: 32px;
}
.lettre {
    margin-right: 12px;
}
#shortcutsSection .container {
    margin-top: 100px;
    background: rgba(255, 255, 255, 0.60);
    padding: 50px;
}
#shortcuts {
    margin-top: 100px;
    margin-bottom: 50px;
    background: rgba(255, 255, 255, 0.60);
    padding: 50px;
}
#presentation {
    margin-top: 25px;
    margin-bottom: 50px;
    background: rgba(255, 255, 255, 0.60);
    padding: 50px;
}
#presentation img {
    display: block;
    width: 80%;
    margin: auto;
}
#creditsSection {
    margin-top: 100px;
    margin-bottom: 50px;
    background: rgba(255, 255, 255, 0.60);
    padding: 50px;
}