.variation-popup {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0,0,0,0.55);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 999999;
    padding: 20px;
}

.variation-popup-inner {
    background: #fff;
    padding: 25px;
    border-radius: 10px;
    max-width: 500px;
    width: 100%;
}