/* lectures notes page style */
@media only screen and (max-width:800px) {
    #frame_pdf_file {
        display: none;}
    #download{
        background-color: black;
        color: white;
        padding: 1em 1.5em;
        text-decoration: none;
        text-transform: uppercase;
        border-radius: 5px; }

    #download:hover {
        background-color: white;
        color: black;
        border: 2px solid black; }

    .download {
        display: flex;
        justify-content: center;
        align-items: center;
        height: 200px; }
}
@media only screen and (min-width:800px) {
 #lectures_notes {
     overflow: scroll;
 }
}