.gallery {
    z-index: 0;
}
body.welcome header {
    position: absolute;
    background-color: #fff;
    top:0;
    left:0;
    width:100%;
    height: auto;
    margin: 0;
    padding: 10px 0;
}
body.welcome .logo {
    width: 55px;
    height: 55px;
    background-size: contain;
    margin-left: 10px;
    margin-top: 0;
}
body.welcome .slogan {
    display: none;
}
body.welcome nav {
    margin-top: 17px;
}
body.welcome nav ul {
    margin: 0;
}