html {
    height: 100%;
}

body.gtrs-maintenance  {
    height: 100%;
    background: #FFFFFF url('fond.jpg') no-repeat left/cover;
}

body.gtrs-maintenance .content {
    background: transparent url('perche2.png') no-repeat top/cover;
    height: 100%;
    width: 100%;
    margin: auto;
    padding: 27% 27% 0;
}

h1 {
    text-align: center;
    font-weight: 700;
    font-size: 48px;
    margin: 15px 0px;
}

.message {
    font-size: 18px;
    text-align: center;
}