#pdf-viewer {
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #eee;
    padding: 20px;
    border: 1px solid #ccc;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.pdf-page {
    width: 400px; /* or any desired size */
    height: 600px;
    border: 1px solid #000;
    box-shadow: 2px 2px 10px rgba(0, 0, 0, 0.1);
    margin: 0 10px;
}

#navigation-controls {
    text-align: center;
    margin-top: 20px;
}

#navigation-controls button {
    padding: 10px 20px;
    margin: 0 10px;
    background-color: #f8f8f8;
    border: 1px solid #ddd;
    cursor: pointer;
}

.page-container {
    position: relative;
}

.loading-message {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 20px;
    color: #999;
}