body {
    margin: 0px;
    padding: 0px;
}

.introduction {
    height: 100%;
    width: 100%;
    background: url('../img/landing.jpg') no-repeat center center; 
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
    position: relative;
}

img {
  width: 99vw;
}