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

body {
    margin: 0;
    background: radial-gradient(#666, #222);
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
}

.moving-zone {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 320px;
    perspective: 1100px;
}

.popup {
    position: absolute;
    width: 700px;
    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%);
    display: flex;
    justify-content: center;
    align-items: center;
}

.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;
    width: 100%;
    text-align: center;
}

.popup-text {
    color: white;
    font-family: 'Roboto', sans-serif;
    font-size: 30px;
    line-height: 30px;
    font-weight: 100;
}

.popup-text b {
    color: coral;
    font-weight: 300;
}

button {
    padding: 10px 20px;
    background-color: #0c67ae;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #054a7b;
}