#overlay {
    display: none;
    position: fixed;
    z-index: 10;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,.5);
    transition: opacity .5s;
}
#popup {
    max-width: 500px;
    display: none;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    padding: 40px 15px;
    top: 50%;
    left: 50%;
    height: 280px;
    transform: translate(-50%,-55%);
    position: absolute;
    z-index: 10;
    background: #ffffff;
    transition: opacity .5s ease-out;
    width: 100%;
    border-radius: 15px;
}
#errorMessage {
    position: absolute;
    bottom: -20px;
    width: 100%;
    text-align: center;
    font-size: 16px;
    color: red;
    font-weight: 700;
}