html, body {
    height: 100%;
    margin: 0;
    padding: 0;
}

body {
    background-color: #2a2a72;
    background-image: linear-gradient(315deg, #2a2a72 0%, #009ffd 74%);
}

.container {
    width: 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
}

.window {
    position: absolute;
    touch-action: pinch-zoom;

    background-color: #eee;
    color: black;
    border-radius: .5em;
    box-shadow: 0 5px 10px rgba(0,0,0,.35);
    font: 15px 'Roboto', sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    cursor: grab;
    transition: 150ms box-shadow, 150ms background-color, 150ms opacity;
}

.window.dragging {
    opacity: .6;
    background-color: #f7f7f7;
    box-shadow: 0 10px 20px rgba(0,0,0,.35);
}