.popup-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.65);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    z-index: 999;
}

.popup-overlay.show {
    opacity: 1;
    pointer-events: auto;
}

.popup-content {
    background: white;
    padding: 2rem 3rem;
    border-radius: 1rem;
    text-align: center;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.4);
    animation: scaleUp 0.3s ease;
}

.popup-content h2 {
    margin-bottom: 1rem;
}

.popup-content button {
    margin-top: 1.5rem;
    padding: 0.7rem 1.5rem;
    background: #4CAF50;
    color: white;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    cursor: pointer;
}

.popup-content button:hover {
    background: #45a049;
}

@keyframes scaleUp {
    from {
        transform: scale(0.8);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}