.irhvac-heatcalc {
    direction: rtl;
    max-width: 980px;
    margin: 1rem auto;
    font-family: inherit;
    line-height: 1.75;
}

.irhvac-heatcalc *,
.irhvac-heatcalc *::before,
.irhvac-heatcalc *::after {
    box-sizing: border-box;
}

.irhvac-heatcalc__form,
.irhvac-heatcalc__result,
.irhvac-heatcalc__message,
.irhvac-heatcalc__details {
    border: 1px solid #d8dde3;
    border-radius: 8px;
    background: #fff;
}

.irhvac-heatcalc__form {
    padding: 1rem;
}

.irhvac-heatcalc__intro {
    margin: 0 0 1rem;
}

.irhvac-heatcalc__section {
    margin: 0 0 1rem;
    padding: 0.9rem;
    border: 1px solid #e1e5e9;
    border-radius: 7px;
}

.irhvac-heatcalc__section legend {
    padding: 0 0.45rem;
    font-weight: 700;
}

.irhvac-heatcalc__grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.8rem 1rem;
}

.irhvac-heatcalc label {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    min-width: 0;
}

.irhvac-heatcalc label > span:first-child {
    font-weight: 600;
}

.irhvac-heatcalc small {
    color: #5f6872;
}

.irhvac-heatcalc input,
.irhvac-heatcalc select,
.irhvac-heatcalc button {
    font: inherit;
}

.irhvac-heatcalc input[type="text"],
.irhvac-heatcalc select {
    width: 100%;
    min-height: 42px;
    border: 1px solid #bfc6cd;
    border-radius: 6px;
    background: #fff;
    padding: 0.5rem 0.65rem;
}

.irhvac-heatcalc input[type="text"]:focus,
.irhvac-heatcalc select:focus {
    outline: 2px solid rgba(30, 109, 181, 0.2);
    border-color: #1e6db5;
}

.irhvac-heatcalc__control {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: stretch;
}

.irhvac-heatcalc__control input {
    border-radius: 0 6px 6px 0 !important;
    direction: ltr;
    text-align: left;
}

.irhvac-heatcalc__control b {
    display: flex;
    align-items: center;
    padding: 0 0.65rem;
    border: 1px solid #bfc6cd;
    border-right: 0;
    border-radius: 6px 0 0 6px;
    background: #f3f5f7;
    direction: ltr;
    white-space: nowrap;
    font-weight: 500;
}

.irhvac-heatcalc__check {
    display: flex !important;
    flex-direction: row !important;
    align-items: center;
    gap: 0.55rem !important;
    align-self: end;
    min-height: 42px;
}

.irhvac-heatcalc__check input {
    width: 18px;
    height: 18px;
}

.irhvac-heatcalc__table-wrap {
    overflow-x: auto;
}

.irhvac-heatcalc__input-table,
.irhvac-heatcalc__result-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 620px;
}

.irhvac-heatcalc__input-table th,
.irhvac-heatcalc__input-table td,
.irhvac-heatcalc__result-table th,
.irhvac-heatcalc__result-table td {
    padding: 0.55rem;
    border: 1px solid #dfe3e7;
    text-align: right;
    vertical-align: middle;
}

.irhvac-heatcalc__input-table thead th,
.irhvac-heatcalc__result-table thead th {
    background: #f3f5f7;
}

.irhvac-heatcalc__input-table .irhvac-heatcalc__control {
    min-width: 180px;
}

.irhvac-heatcalc__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem;
}

.irhvac-heatcalc__actions button {
    min-width: 120px;
    min-height: 42px;
    padding: 0.5rem 1rem;
    border: 1px solid #1e6db5;
    border-radius: 6px;
    cursor: pointer;
}

.irhvac-heatcalc__actions button[type="submit"] {
    background: #1e6db5;
    color: #fff;
}

.irhvac-heatcalc__actions .irhvac-heatcalc__reset {
    background: #fff;
    color: #1e6db5;
}

.irhvac-heatcalc__message,
.irhvac-heatcalc__result,
.irhvac-heatcalc__details {
    margin-top: 1rem;
    padding: 1rem;
}

.irhvac-heatcalc__message--error {
    border-color: #cf8d8d;
    background: #fff7f7;
}

.irhvac-heatcalc__message ul {
    margin-bottom: 0;
}

.irhvac-heatcalc__result h3 {
    margin-top: 0;
}

.irhvac-heatcalc__summary {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.7rem;
    margin-bottom: 1rem;
}

.irhvac-heatcalc__summary div {
    padding: 0.8rem;
    border: 1px solid #dfe3e7;
    border-radius: 7px;
    background: #f8f9fa;
}

.irhvac-heatcalc__summary span,
.irhvac-heatcalc__summary strong {
    display: block;
}

.irhvac-heatcalc__summary strong {
    margin-top: 0.2rem;
    direction: ltr;
    text-align: right;
}

.irhvac-heatcalc__details {
    padding: 0;
    overflow: hidden;
}

.irhvac-heatcalc__details summary {
    cursor: pointer;
    padding: 0.8rem 1rem;
    font-weight: 700;
    background: #f7f8f9;
}

.irhvac-heatcalc__details-body {
    padding: 0.9rem 1rem;
}

.irhvac-heatcalc__details-body > :first-child {
    margin-top: 0;
}

.irhvac-heatcalc__details-body > :last-child {
    margin-bottom: 0;
}

.irhvac-heatcalc__author {
    margin: 0.75rem 0 0;
    font-size: 0.92rem;
    color: #5f6872;
}

.irhvac-heatcalc [hidden] {
    display: none !important;
}

@media (max-width: 760px) {
    .irhvac-heatcalc__grid,
    .irhvac-heatcalc__summary {
        grid-template-columns: 1fr;
    }

    .irhvac-heatcalc__form {
        padding: 0.75rem;
    }

    .irhvac-heatcalc__section {
        padding: 0.75rem;
    }
}