body { height: 100%; }
html { height: 100%; }
body {
    margin: 0;
    background: radial-gradient(#666, #222);
    overflow: hidden;
}

.moving-zone {
    position: absolute;
    top:10%; left:35%;
    width:600px; height:400px;
    margin: -60px 0 0 -150px;
    perspective: 800px;
}
.popup {
    position: absolute;
    width:800px;
    padding: 10px;
    box-sizing: border-box;
    border-radius: 20px 0 20px 0;
    cursor: pointer;
    transform-style: preserve-3d;
    background: -webkit-linear-gradient(top left, white 50%, coral 50%);
    background:    -moz-linear-gradient(top left, white 50%, coral 50%);
    background:     -ms-linear-gradient(top left, white 50%, coral 50%);
    background:      -o-linear-gradient(top left, white 50%, coral 50%);
    background:         linear-gradient(top left, white 50%, coral 50%);
}
.popup:before {
    content: '';
    position: absolute;
    left:5%; top:5%;
    width:90%; height:90%;
    border-radius: inherit;
    background: rgba(0,0,0,.1);
    box-shadow: 0 0 40px 20px rgba(0,0,0,.1);
    transform: translateZ(-100px);
}
.popup-content {
    background: #444;
    padding: 20px;
    box-sizing: border-box;
    border-radius: 10px 0 10px 0;
}
.popup-text {
    color: white;
    font-family: 'Roboto', sans-serif;
    font-size: 20px;
    line-height: 30px;
    font-weight: 100;
    text-align: center;
    transform: translateZ(15px);
}
.popup-text b {
    color: coral;
    font-weight: 300;
}