.overlay {
    position: fixed;
    display: block;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    z-index: 2;
    cursor: pointer;
}

.overlay-content {
    background-color: black;
    position: absolute;
    top: 50%;
    left: 50%;
    padding: 3% 3% 3% 3%;
    transform: translate(-50%, -50%);
    -ms-transform: translate(-50%,-50%);
}

.overlay-content > *, .overlay-content > * > * {
    font-size: 18px;
    font-family: Roboto;
}

.overlay-content > button {
    display: block;
    margin-top: 25px;
    margin-left: auto;
    margin-right: auto;
}