.canvas {
    width: 100%;
    height: 100%;
    position: fixed;
    top: 0;
    bottom: 0;
    z-index: -1;
}

.popup {
    margin: 8rem auto 0 auto;
    text-align: center;
    z-index: -1;
}

.popup > p {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.faded * {
    color: transparent;
    -webkit-transition: color 1000ms linear;
    -ms-transition: color 1000ms linear;
    transition: color 1000ms linear;
}

.hidden {
    display: none;
}

.content {
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}