.dev-message {
    display: block;
    position: fixed;
    z-index: 1200;
    left: 0;
    top:0;
    width: 100%;
    height: 100%;
    padding: 10% 0 0;
    background-color: rgba(0,0,0,0.95);
}

.dev-message p {
    color: #fff;
    text-align: center;
}