.pdf-viewer {
    width: 100%;
    overflow: auto;
    text-align: center;
    background: #f9f9f9;
    padding: 10px;
}
.pdf-viewer canvas {
    max-width: 100%;
    height: auto;
    margin-top: 10px;
}
.pdf-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    margin-bottom: 10px;
}
.pdf-controls button {
    padding: 8px 10px;
    border: 1px solid black;
    background: black;
    cursor: pointer;
    border-radius: 0px;
}
.pdf-controls button:hover {
    background: #ddd;
}