.pdf-container-flex {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
    width: 100%;
    min-height: 800px;
}

.pdf-container-flex iframe {
    flex: 1 1 45%;
    min-width: 300px;
    height: 1000px;
    border: 1px solid #ddd;
}