.number-inputs {
    margin-bottom: 2.5rem;
}

input[type="number"] {
    -webkit-appearance: textfield;
    -moz-appearance: textfield;
    appearance: textfield;
    padding: .5em;
    border: 1px solid #666;
    border-radius: .3em;
    outline: none;
    font-size: 1em;
}

.irs {
    max-width: 500px;
    margin-bottom: 3em;
}

.lead {
    font-weight: 600;
    color: #777;
    margin-bottom: 3em;
}

.output {
    font-family: monospace;
    font-size: 1.35em;
}