.irhvac-beyon {
    --beyon-primary: #236a86;
    --beyon-primary-dark: #194f65;
    --beyon-border: #cfd9e2;
    --beyon-soft: #f4f8fb;
    --beyon-text: #263746;
    --beyon-muted: #657482;
    max-width: 780px;
    margin: 1rem auto;
    color: var(--beyon-text);
    font: inherit;
}

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

.irhvac-beyon__title {
    margin: 0 0 .75rem;
    padding: .55rem .8rem;
    border-right: 4px solid var(--beyon-primary);
    background: var(--beyon-soft);
    color: var(--beyon-text);
    font-size: 1.25rem;
    line-height: 1.8;
}

.irhvac-beyon__instruction {
    margin: 0 0 .75rem;
    padding: .65rem .8rem;
    border: 1px solid #d8e5ec;
    border-radius: 6px;
    background: #fbfdfe;
    color: #425665;
    line-height: 1.9;
}

.irhvac-beyon__formula {
    margin: 0 0 .75rem;
    padding: .65rem .8rem;
    border: 1px solid var(--beyon-border);
    border-radius: 6px;
    background: #fff;
    text-align: center;
    direction: ltr;
    font-family: Georgia, "Times New Roman", serif;
    font-size: 1.1rem;
}

.irhvac-beyon__form {
    margin: 0;
    padding: 1rem;
    border: 1px solid var(--beyon-border);
    border-radius: 8px;
    background: #fff;
    box-shadow: 0 2px 9px rgba(31, 55, 72, .06);
}

.irhvac-beyon__grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: .8rem 1rem;
}

.irhvac-beyon__field {
    display: grid;
    gap: .32rem;
    margin: 0;
    font-weight: 700;
    line-height: 1.65;
}

.irhvac-beyon__field > span:first-child { font-size: .93rem; }

.irhvac-beyon__input-wrap {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    overflow: hidden;
    border: 1px solid #b8c5cf;
    border-radius: 6px;
    background: #fff;
    transition: border-color .15s ease, box-shadow .15s ease;
}

.irhvac-beyon__input-wrap:focus-within {
    border-color: var(--beyon-primary);
    box-shadow: 0 0 0 3px rgba(35, 106, 134, .12);
}

.irhvac-beyon__field.is-calculated .irhvac-beyon__input-wrap {
    border-color: #72a67b;
    background: #f3faf4;
}

.irhvac-beyon .irhvac-beyon__input-wrap input {
    width: 100%;
    min-width: 0;
    height: 42px;
    margin: 0;
    padding: .5rem .7rem;
    border: 0;
    border-radius: 0;
    outline: 0;
    background: transparent;
    color: var(--beyon-text);
    font: inherit;
    font-weight: 500;
    direction: ltr;
    text-align: left;
    box-shadow: none;
}

.irhvac-beyon .irhvac-beyon__input-wrap input::placeholder {
    color: #99a5ae;
    direction: rtl;
    text-align: right;
}

.irhvac-beyon__input-wrap select,
.irhvac-beyon__input-wrap > bdi {
    min-width: 82px;
    height: 42px;
    margin: 0;
    padding: 0 .55rem;
    border: 0;
    border-right: 1px solid #d6dfe6;
    border-radius: 0;
    background: #f3f6f8;
    color: var(--beyon-muted);
    font: inherit;
    font-size: .82rem;
    font-weight: 600;
    direction: ltr;
    box-shadow: none;
}

.irhvac-beyon__input-wrap > bdi {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.irhvac-beyon__actions {
    display: flex;
    flex-wrap: wrap;
    gap: .6rem;
    margin-top: 1rem;
}

.irhvac-beyon .irhvac-beyon__button {
    display: inline-flex;
    min-width: 130px;
    min-height: 42px;
    align-items: center;
    justify-content: center;
    margin: 0;
    padding: .55rem 1.15rem;
    border: 1px solid transparent;
    border-radius: 6px;
    font: inherit;
    font-weight: 800;
    line-height: 1.4;
    text-decoration: none !important;
    cursor: pointer;
    box-shadow: none;
}

.irhvac-beyon .irhvac-beyon__button--primary { background: var(--beyon-primary); color: #fff; }
.irhvac-beyon .irhvac-beyon__button--primary:hover,
.irhvac-beyon .irhvac-beyon__button--primary:focus-visible { background: var(--beyon-primary-dark); color: #fff; }
.irhvac-beyon .irhvac-beyon__button--secondary { border-color: #b9c6cf; background: #fff; color: #394b58; }
.irhvac-beyon .irhvac-beyon__button--secondary:hover,
.irhvac-beyon .irhvac-beyon__button--secondary:focus-visible { background: #f3f6f8; color: #273945; }

.irhvac-beyon__result { scroll-margin-top: 90px; }

.irhvac-beyon__result-main {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: .65rem 1rem;
    margin-top: .85rem;
    padding: .8rem 1rem;
    border: 1px solid #a9cbd7;
    border-radius: 7px;
    background: #edf7fa;
}

.irhvac-beyon__result-main span { color: var(--beyon-muted); font-size: .87rem; }
.irhvac-beyon__result-main strong { color: #234555; }
.irhvac-beyon__result-main output { color: #0d5871; font-size: 1.25rem; font-weight: 900; direction: ltr; }

.irhvac-beyon__result-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1px;
    margin: .65rem 0 0;
    overflow: hidden;
    border: 1px solid var(--beyon-border);
    border-radius: 7px;
    background: var(--beyon-border);
}

.irhvac-beyon__result-grid div { padding: .65rem .75rem; background: #fff; }
.irhvac-beyon__result-grid dt { margin: 0 0 .2rem; color: var(--beyon-muted); font-size: .82rem; }
.irhvac-beyon__result-grid dd { margin: 0; color: #243d4a; font-weight: 800; direction: ltr; text-align: right; }

.irhvac-beyon__error {
    margin: .85rem 0 0;
    padding: .75rem .9rem;
    border: 1px solid #e0aaa6;
    border-radius: 6px;
    background: #fff3f2;
    color: #8a2f28;
    line-height: 1.8;
}

.irhvac-beyon__reference {
    margin-top: .85rem;
    padding: .65rem .8rem;
    border: 1px solid var(--beyon-border);
    border-radius: 6px;
    background: #fbfcfd;
    line-height: 1.9;
}

.irhvac-beyon__reference summary { cursor: pointer; font-weight: 800; }
.irhvac-beyon__reference p { margin: .55rem 0 0; }
.irhvac-beyon__author { margin: .75rem 0 0; color: var(--beyon-muted); font-size: .85rem; }

@media (max-width: 640px) {
    .irhvac-beyon__grid,
    .irhvac-beyon__result-grid { grid-template-columns: 1fr; }
    .irhvac-beyon__result-main { grid-template-columns: 1fr; }
    .irhvac-beyon__actions { display: grid; grid-template-columns: 1fr; }
    .irhvac-beyon .irhvac-beyon__button { width: 100%; }
}