span {
    margin-right:1em;
    width: 2em;
    display: inline-block;
}
button {
    margin-right: 1em;
}
.rangeinput {
    width:4em;
}
.firstrow {
    margin-bottom: 10px;
}
.oprow {
    margin-bottom:5px;
}
.rescell {
    border-width: 3px;
    border-color: black;
    width: 8em;
    height: 2em;
    display: inline-block;
}

.resok {
    border-width: 3px;
    border-color: green;
    width: 8em;
    height: 2em;
    display: inline-block;
}

.resbad {
    border-width: 3px;
    border-color: red;
    width: 8em;
    height: 2em;
    display: inline-block;
}

#result {
    width: 3em;
    height: 2em;
    display: inline-block;
}