#pdfjs-container {
    width: 100%;
    max-width: 100%;
    margin: 0 auto;
    padding: 10px;
    overflow-x: hidden;
}

canvas {
    width: 100% !important;
    max-width: 100% !important;
    height: auto !important;
    display: block;
    margin: 20px auto;
    background: #fff;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
    border-radius: 6px;
}