#calculator .input-group-addon {
    padding: 10px 12px;
}
#calculator .input-group-addon, .input-group-btn {
    width: 50px;
}
#calculator .input-group {
    min-width: 50%;
}
.mt-20 {
    margin-top: 2rem !important;
}

.mt-5 {
    margin-top: 0.5rem !important;
}

.mb-0 {
    margin-bottom: 0 !important;
}

.mb-15 {
    margin-bottom: 1.5rem !important;
}

.calculator--result {
    text-align: center;
    margin-top: 2rem;
    margin-bottom: 2rem;
    font-weight: 800;
    font-size: 2rem;
}

.section-help {
    font-size: 0.8em;
}