#captcha-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.8);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
}

.captcha-box {
    background: white;
    padding: 20px;
    border-radius: 10px;
    text-align: center;
}