#tripcosmos-overlay {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0,0,0,0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 999999;
}
#tripcosmos-popup {
    background: #fff;
    padding: 20px;
    max-width: 500px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    position: relative;
}
#tripcosmos-close {
    position: absolute;
    top: 10px; right: 15px;
    font-size: 20px;
    cursor: pointer;
}