body
{
    background-size: contain; 
    background-repeat: repeat;
}

div.bar
{
    /*position: -webkit-sticky;*/
    position: sticky;
    top:0;
    background-color: rgb(207, 234, 250);
    padding:20px;
    text-align: center;
    margin-bottom: 10px;
    border:groove 3px grey;
}

span.bar
{
    font-size:12px;
}

table.exam
{
    width:100%;
    border-collapse: collapse;
}

td.exam
{
    border:groove 3px grey;
    padding:10px;
    width:50%;
    text-align: center;
}

img.exam
{
    max-width:100%;
    max-height:30vh;
}

select.exam
{
    font-size:16px;
}

input[type="submit"]
{
    font-size:18px;
}