span.reveal {
    display: inline-block;
    text-decoration: underline;
    color: red;
}

#sandbox span {
    display: inline-block;
}


#sandbox p {
    line-height: 1.5em;
    display: inline-block;
}

button#remove {
    float: right;
    margin-top: -40px;
}


span.reveal em.highlighted {
    background-color: none !important;
    
}