.wpsp-popup-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 99999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    box-sizing: border-box;
}
.wpsp-popup-content {
    padding: 30px;
    border-radius: 5px;
    position: relative;
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
}
.wpsp-popup-content img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
}
.wpsp-popup-close {
    position: absolute;
    top: 10px;
    right: 10px;
    background: none;
    border: none;
    font-size: 24px;
    line-height: 1;
    cursor: pointer;
    padding: 5px;
    color: #333;
}
.wpsp-popup-close:hover {
    color: #000;
}
.wpsp-popup-content h2 {
    margin-top: 0;
}