body {
    font-family: Arial, sans-serif;
    background: #f2f2f2;
    text-align: center;
    margin: 0;
    padding: 0px;
}

#controls {
    margin: 15px;
}

button {
    padding: 6px 12px;
    margin: 0 3px;
    font-size: 12px;
    background-color: #0e7930;
    color:#fff;
}

#pdf-container {
    background: white;
    /*box-shadow: 0 0 8px rgba(0,0,0,0.1);*/
    box-shadow: 0 0 0 .25rem rgba(13,110,253,.25);
    margin: 0 auto;
    width: 90%;
    max-width: 900px;
    padding: 6px;
}

canvas {
    width: 100%;
    border: 1px solid #0e7930;
}