/* ── I-N-TECH Energy Calculator v1.1 — brand colours ─────── */
.intech-calc {
    --ic-bg:      #020505;
    --ic-surface: rgba(40, 85, 73, 0.22);
    --ic-border:  rgba(91, 194, 167, 0.18);
    --ic-primary: #5BC2A7;
    --ic-warm:    #F36E46;
    --ic-dark:    #285549;
    --ic-text:    #ffffff;
    --ic-muted:   rgba(255, 255, 255, 0.42);
    --ic-error:   #ff5959;
    --ic-radius:  12px;
    --ic-font:    -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    background:    var(--ic-bg);
    border:        1px solid var(--ic-border);
    border-radius: 18px;
    padding:       44px 40px;
    max-width:     740px;
    margin:        0 auto;
    font-family:   var(--ic-font);
    color:         var(--ic-text);
    box-sizing:    border-box;
}

.intech-calc *, .intech-calc *::before, .intech-calc *::after {
    box-sizing: border-box;
}

/* ── Header ──────────────────────────────────────────────── */
.ic-header {
    text-align:    center;
    margin-bottom: 36px;
}

.ic-title {
    font-size:   2rem;
    font-weight: 800;
    margin:      0 0 10px;
    letter-spacing: -.02em;
    background:  linear-gradient(100deg, var(--ic-warm) 20%, var(--ic-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.ic-subtitle {
    margin:         0;
    font-size:      .85rem;
    color:          var(--ic-muted);
    letter-spacing: .02em;
}

/* ── Sector picker ───────────────────────────────────────── */
.ic-sectors {
    display:               grid;
    grid-template-columns: repeat(4, 1fr);
    gap:                   10px;
    margin-bottom:         30px;
}

.ic-sector-card {
    background:  var(--ic-surface) !important;
    border:      1px solid var(--ic-border) !important;
    border-radius: var(--ic-radius) !important;
    padding:     20px 10px 16px !important;
    cursor:      pointer;
    text-align:  center;
    transition:  border-color .18s, background .18s, transform .12s;
    color:       var(--ic-text) !important;
    appearance:  none;
    -webkit-appearance: none;
    width:       100%;
    box-shadow:  none !important;
}

.ic-sector-card:hover {
    border-color: var(--ic-primary) !important;
    background:   rgba(91, 194, 167, 0.1) !important;
    transform:    translateY(-2px);
}

.ic-sector-card.ic-active {
    border-color: var(--ic-primary) !important;
    background:   rgba(91, 194, 167, 0.14) !important;
}

.ic-sector-card__icon {
    display:       block;
    width:         28px;
    height:        28px;
    margin:        0 auto 10px;
    color:         var(--ic-muted);
    transition:    color .18s;
}

.ic-sector-card__icon svg {
    width:  100%;
    height: 100%;
}

.ic-sector-card:hover .ic-sector-card__icon,
.ic-sector-card.ic-active .ic-sector-card__icon {
    color: var(--ic-primary);
}

.ic-sector-card__name {
    display:     block;
    font-size:   .7rem;
    font-weight: 600;
    color:       var(--ic-muted);
    line-height: 1.35;
    text-transform: uppercase;
    letter-spacing: .05em;
    transition:  color .18s;
}

.ic-sector-card:hover .ic-sector-card__name,
.ic-sector-card.ic-active .ic-sector-card__name {
    color: var(--ic-primary);
}

/* ── Forms ───────────────────────────────────────────────── */
.ic-sector-form {
    display:   none;
    animation: ic-slide-in .22s ease;
}

.ic-sector-form.ic-active {
    display: block;
}

@keyframes ic-slide-in {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: none; }
}

.ic-form-title {
    display:     flex;
    align-items: center;
    gap:         10px;
    font-size:   1rem;
    font-weight: 700;
    margin:      0 0 22px;
    color:       var(--ic-primary);
}

.ic-form-title__icon {
    width:  20px;
    height: 20px;
    flex-shrink: 0;
}

.ic-form-title__icon svg {
    width:  100%;
    height: 100%;
}

.ic-form-row {
    display:               grid;
    grid-template-columns: 1fr 1fr;
    gap:                   16px;
}

.ic-field {
    margin-bottom: 18px;
}

.ic-field label {
    display:        block;
    font-size:      .72rem;
    font-weight:    600;
    color:          var(--ic-muted);
    text-transform: uppercase;
    letter-spacing: .07em;
    margin-bottom:  7px;
}

.ic-field__unit {
    font-weight: 400;
    color:       rgba(255, 255, 255, 0.22);
    text-transform: none;
    letter-spacing: 0;
    margin-left: 3px;
}

.ic-field input[type="number"] {
    width:         100%;
    background:    rgba(255, 255, 255, 0.04);
    border:        1px solid var(--ic-border);
    border-radius: 8px;
    padding:       12px 14px;
    color:         var(--ic-text);
    font-size:     1rem;
    font-family:   var(--ic-font);
    outline:       none;
    transition:    border-color .18s, background .18s;
    -moz-appearance: textfield;
}

.ic-field input[type="number"]::-webkit-inner-spin-button,
.ic-field input[type="number"]::-webkit-outer-spin-button { display: none; }

.ic-field input[type="number"]:focus {
    border-color: var(--ic-primary);
    background:   rgba(91, 194, 167, 0.05);
}

.ic-field input[type="number"]::placeholder { color: #2a3d38; }

.ic-field__hint {
    font-size:  .7rem;
    color:      rgba(255, 255, 255, 0.2);
    margin-top: 5px;
}

.ic-error {
    font-size:    .8rem;
    color:        var(--ic-error);
    min-height:   1.2em;
    margin-bottom: 10px;
}

/* ── Calculate button ────────────────────────────────────── */
.ic-calc-btn {
    width:          100%;
    padding:        14px 20px;
    border:         none;
    border-radius:  var(--ic-radius);
    background:     linear-gradient(100deg, var(--ic-warm), var(--ic-primary));
    color:          #000;
    font-weight:    800;
    font-size:      .9rem;
    font-family:    var(--ic-font);
    cursor:         pointer;
    letter-spacing: .07em;
    text-transform: uppercase;
    transition:     opacity .15s, transform .1s;
}

.ic-calc-btn:hover  { opacity: .88; }
.ic-calc-btn:active { transform: scale(.99); }

/* ── Results ─────────────────────────────────────────────── */
.ic-results {
    margin-top: 28px;
    animation:  ic-slide-in .3s ease;
}

.ic-results__header {
    text-align:     center;
    font-size:      .72rem;
    font-weight:    700;
    text-transform: uppercase;
    letter-spacing: .14em;
    color:          var(--ic-primary);
    margin-bottom:  16px;
}

.ic-results__grid {
    display:               grid;
    grid-template-columns: 1fr 1fr;
    gap:                   10px;
    margin-bottom:         16px;
}

/* Primary card — watts, full width */
.ic-card--primary {
    grid-column:  1 / -1;
    border-color: rgba(91, 194, 167, 0.4) !important;
    background:   rgba(91, 194, 167, 0.09) !important;
}

.ic-card--primary .ic-card__value {
    font-size: 2.4rem;
    color:     var(--ic-primary);
}

/* Annual yield — full width so CO₂ + Homes share the last row */
.ic-results__grid .ic-card:nth-child(4) {
    grid-column: 1 / -1;
}

/* Impact cards */
.ic-card--impact {
    border-color: rgba(243, 110, 70, 0.28) !important;
    background:   rgba(243, 110, 70, 0.07) !important;
}

.ic-card--impact .ic-card__value { color: var(--ic-warm); }

/* Base card */
.ic-card {
    background:    var(--ic-surface);
    border:        1px solid var(--ic-border);
    border-radius: var(--ic-radius);
    padding:       18px 16px 14px;
    text-align:    center;
}

.ic-card__value {
    font-size:            1.45rem;
    font-weight:          800;
    color:                var(--ic-primary);
    font-variant-numeric: tabular-nums;
    letter-spacing:       -.02em;
    line-height:          1;
    margin-bottom:        6px;
}

.ic-card__label {
    font-size:      .68rem;
    font-weight:    600;
    color:          var(--ic-muted);
    text-transform: uppercase;
    letter-spacing: .06em;
    margin-bottom:  2px;
}

.ic-card__unit {
    font-size: .62rem;
    color:     rgba(255, 255, 255, 0.2);
}

/* ── Reset button ────────────────────────────────────────── */
.ic-reset {
    display:       block;
    margin:        0 auto;
    background:    none;
    border:        1px solid var(--ic-border);
    border-radius: 20px;
    color:         var(--ic-muted);
    font-size:     .78rem;
    font-family:   var(--ic-font);
    padding:       7px 22px;
    cursor:        pointer;
    transition:    border-color .18s, color .18s;
}

.ic-reset:hover {
    border-color: var(--ic-primary);
    color:        var(--ic-text);
}

/* ── Hidden utility ──────────────────────────────────────── */
.intech-calc [hidden] { display: none !important; }

/* ── Responsive — tablet ─────────────────────────────────── */
@media (max-width: 768px) {
    .intech-calc {
        padding: 30px 22px;
    }

    .ic-title { font-size: 1.6rem; }

    .ic-sectors {
        grid-template-columns: repeat(2, 1fr);
    }

    .ic-form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }
}

/* ── Responsive — mobile ─────────────────────────────────── */
@media (max-width: 480px) {
    .intech-calc {
        padding:       22px 16px;
        border-radius: 12px;
    }

    .ic-title { font-size: 1.35rem; }

    .ic-results__grid { gap: 8px; }

    .ic-card--primary .ic-card__value { font-size: 1.9rem; }
    .ic-card__value                   { font-size: 1.2rem; }
}