/* Fullscreen Overlay */
#classic-tab-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0,0,0,0.8);
    z-index: 9999;
}

/* Popup Box */
#classic-tab-popup {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    background: #fff;
    padding: 25px;
    width: 320px;
    max-width: 90%;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0,0,0,0.3);
}

/* Close Button */
#classic-tab-close {
    position: absolute;
    top: 10px; right: 15px;
    cursor: pointer;
    font-size: 20px;
    font-weight: bold;
}

/* Buttons */
.classic-tab-btn {
    display: inline-block;
    padding: 10px 18px;
    margin-top: 15px;
    background: #0073e6;
    color: #fff;
    border-radius: 6px;
    text-decoration: none;
    font-weight: bold;
    transition: 0.3s;
}
.classic-tab-btn:hover {
    background: #005bb5;
}