body {
    background-color: #EFEFEF;
}
h1 {
    text-align: center;
}

#sliderStage {
    width: 100%;
    height: 300px;
    margin: auto;

    background-color: white;
    box-shadow: 0 2px 4px rgba(0,0,0,0.5);
}

@media only screen and (min-width: 800px) {
    #sliderStage {
        width: 600px;
        height: 400px;
    }
}