table {
    overflow: hidden;
    text-align: center;
    z-index: 1;
    width: 85%;
}

td, th {
    padding: 5px;
    position: relative;
}
tr:hover{
    background-color: #eee;
}

 .sequence{
    background-color:#f8f8ff;
    width: 50%;
    border-radius: 3px;
    border: none;
    text-align: left;
    font-size: 2em;
    border: 1px solid black;
    margin-bottom: 5px;
}

td:hover::after { 
    background-color: #eee;
    content: '\00a0';  
    height: 10000px;    
    left: 0;
    position: absolute;  
    top: -5000px;
    width: 100%;
    z-index: -1;        
}

#output{
    font-size: 2em;
    vertical-align: sub;
}

@media only screen and (max-width:768px){
    table, #table-title{
        display: none;
    }
    .sequence {
        width: 100%;
        text-align: left;
    }

}