.pdf-preview-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 999;
}

.pdf-preview-content {
    position: relative;
    background: #fff;
    padding: 1rem;
    width: 80%;
    max-width: 900px;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    max-height: 90%;
}

.pdf-close {
    position: absolute;
    top: 8px;
    right: 8px;
    z-index: 9999; /* ABOVE iframe */
    background: #fff;
    border: none;
    font-size: 15px;
    cursor: pointer;
    padding: 4px 10px;
    border-radius: 50%;
}