/* reset style */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    position: relative;
    width: 100%; height: 100vh;
    overflow: hidden;
}

#pdf-container {
    position: absolute;
    width: 100%;
    height: 100%;
}

#pdf-viewer {
    width: 100%;
    height: 100%;
    border: none;
}

#background-music {
    display: none;
}