.irhvac-froude {
    box-sizing: border-box;
    width: 100%;
    max-width: 720px;
    margin: 1rem auto;
    font-family: inherit;
    color: inherit;
}

.irhvac-froude *,
.irhvac-froude *::before,
.irhvac-froude *::after {
    box-sizing: inherit;
}

.irhvac-froude__form {
    padding: 1rem;
    border: 1px solid #d8dde3;
    border-radius: 8px;
    background: #fff;
}

.irhvac-froude__intro {
    margin: 0 0 .8rem;
    line-height: 1.8;
}

.irhvac-froude__formula {
    margin: 0 0 1rem;
    padding: .65rem .8rem;
    border: 1px solid #e1e5e9;
    border-radius: 6px;
    background: #f7f8fa;
    text-align: center;
    font-size: 1.05rem;
}

.irhvac-froude__fields {
    display: grid;
    gap: .75rem;
}

.irhvac-froude__row {
    display: grid;
    grid-template-columns: minmax(150px, 1fr) minmax(210px, 1.35fr);
    align-items: center;
    gap: .75rem;
}

.irhvac-froude__row label {
    font-weight: 600;
}

.irhvac-froude__input-wrap {
    display: flex;
    align-items: stretch;
}

.irhvac-froude__input-wrap input {
    min-width: 0;
    width: 100%;
    height: 42px;
    padding: .55rem .7rem;
    border: 1px solid #bfc7d0;
    border-left: 0;
    border-radius: 0 6px 6px 0;
    background: #fff;
    color: inherit;
    font: inherit;
    direction: ltr;
    text-align: left;
}

.irhvac-froude__input-wrap input:focus {
    outline: 2px solid rgba(32, 104, 170, .22);
    border-color: #3578b8;
}

.irhvac-froude__unit {
    display: inline-flex;
    min-width: 84px;
    align-items: center;
    justify-content: center;
    padding: .45rem .55rem;
    border: 1px solid #bfc7d0;
    border-radius: 6px 0 0 6px;
    background: #f2f4f6;
    white-space: nowrap;
}

.irhvac-froude__row.is-calculated input {
    border-color: #4d8b5f;
    background: #f1faf4;
    font-weight: 700;
}

.irhvac-froude__actions {
    display: flex;
    flex-wrap: wrap;
    gap: .65rem;
    margin-top: 1rem;
}

.irhvac-froude__actions button {
    min-height: 42px;
    padding: .55rem 1.2rem;
    border: 1px solid #8f99a5;
    border-radius: 6px;
    font: inherit;
    cursor: pointer;
}

.irhvac-froude__submit {
    border-color: #245f96 !important;
    background: #245f96;
    color: #fff;
}

.irhvac-froude__reset {
    background: #fff;
    color: inherit;
}

.irhvac-froude__message,
.irhvac-froude__result,
.irhvac-froude__help {
    margin-top: .85rem;
    border: 1px solid #d8dde3;
    border-radius: 8px;
    background: #fff;
}

.irhvac-froude__message {
    padding: .8rem 1rem;
    border-color: #d6a3a3;
    background: #fff7f7;
}

.irhvac-froude__result {
    padding: 1rem;
}

.irhvac-froude__result h3 {
    margin: 0 0 .7rem;
    font-size: 1.05rem;
}

.irhvac-froude__result dl {
    display: grid;
    gap: .55rem;
    margin: 0;
}

.irhvac-froude__result dl > div {
    display: grid;
    grid-template-columns: minmax(150px, 1fr) minmax(130px, 1fr);
    gap: .75rem;
    padding-bottom: .45rem;
    border-bottom: 1px solid #eceff2;
}

.irhvac-froude__result dl > div:last-child {
    padding-bottom: 0;
    border-bottom: 0;
}

.irhvac-froude__result dt {
    font-weight: 600;
}

.irhvac-froude__result dd {
    margin: 0;
}

.irhvac-froude__help summary {
    padding: .8rem 1rem;
    cursor: pointer;
    font-weight: 600;
}

.irhvac-froude__help > div {
    padding: 0 1rem .9rem;
    line-height: 1.8;
}

.irhvac-froude__help p {
    margin: .4rem 0;
}

.irhvac-froude__author {
    margin: .7rem 0 0;
    font-size: .92rem;
}

@media (max-width: 600px) {
    .irhvac-froude__row {
        grid-template-columns: 1fr;
        gap: .35rem;
    }

    .irhvac-froude__result dl > div {
        grid-template-columns: 1fr;
        gap: .2rem;
    }

    .irhvac-froude__actions button {
        flex: 1 1 140px;
    }
}