.popup-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

/* Popup box */
.popup-box {
    background: #fff;
    padding: 2rem;
    border-radius: 10px;
    max-width: 400px;
    width: 90%;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.3);
    position: relative;
    animation: fadeIn 0.3s ease-in-out;
}

/* Close button */
.close-popup {
    position: absolute;
    top: 12px;
    right: 12px;
    font-size: 20px;
    cursor: pointer;
    color: #888;
    transition: color 0.2s ease;
}

.close-popup:hover {
    color: #000;
}

/* Form */
.popup-box h2 {
    margin-top: 0;
}

.popup-box input[type="email"] {
    width: 100%;
    padding: 12px;
    margin: 10px 0;
    border: 1px solid #ccc;
    border-radius: 8px;
}

.popup-box button {
    background: #4caf50;
    color: white;
    border: none;
    padding: 12px;
    width: 100%;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
}

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

@keyframes fadeIn {
    from {
        transform: scale(0.95);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}