/* filter input */
thead input[name=filter_input]{
    border: 1px solid black;
    -webkit-border-radius: 5px;
    -moz-border-radius: 5px;
    border-radius: 5px;
    padding: 5px;
    color: black;
    background-color: whitesmoke;
}

/* filter input with sort arrows */
thead input[name=filter_input]:not(:only-child){
    margin-right: 10px;
}

/* placeholder for filter input */
thead input[name=filter_input]::placeholder{
    color: #4d4d4d;
    text-align: center;
    vertical-align: middle;
}

/* rows hidden by filtering */
.hidden{
    display: none;
}