/* ═══════════════════════════════════════════════════════════════
   Calculadora Solar - Modal iStar
   ═══════════════════════════════════════════════════════════════ */

/* ─── Overlay ──────────────────────────────────────────────── */
.calc-overlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 10000;
    background: rgba(8, 20, 34, .75);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    overflow: hidden;
}

.calc-overlay.active {
    display: block;
}

/* ─── Modal ────────────────────────────────────────────────── */
.calc-modal {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(.92);
    width: min(94vw, 1200px);
    max-height: 90vh;
    background: var(--color-darker, #081422);
    border: 1px solid rgba(241, 168, 54, .2);
    border-radius: var(--radius-xl, 28px);
    box-shadow: 0 25px 60px rgba(0,0,0,.6), 0 0 40px rgba(241, 168, 54, .08);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: transform .35s cubic-bezier(.34, 1.56, .64, 1), opacity .3s ease;
    opacity: 0;
    pointer-events: none;
}

.calc-overlay.active .calc-modal {
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
    pointer-events: all;
}

/* ─── Header del Modal ─────────────────────────────────────── */
.calc-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 28px;
    border-bottom: 1px solid rgba(241, 168, 54, .15);
    background: linear-gradient(135deg, rgba(18, 64, 114, .4), rgba(8, 20, 34, .6));
    flex-shrink: 0;
}

.calc-header-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.calc-header-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--color-accent), #e09120);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.calc-header h2 {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 300;
    color: var(--color-white);
    margin: 0;
    letter-spacing: .03em;
}

.calc-header h2 span {
    color: var(--color-accent);
}

.calc-header-sub {
    font-size: .75rem;
    color: var(--color-gray-500);
    font-weight: 500;
    letter-spacing: .04em;
}

.calc-close {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    border: 1px solid rgba(255,255,255,.1);
    background: rgba(255,255,255,.04);
    color: var(--color-gray-400);
    font-size: 18px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}
.calc-close:hover {
    background: rgba(241, 168, 54, .15);
    border-color: var(--color-accent);
    color: var(--color-accent);
}

/* ─── Body del Modal (scrollable) ──────────────────────────── */
.calc-body {
    flex: 1;
    overflow-y: auto;
    padding: 24px 28px 20px;
    scrollbar-width: thin;
    scrollbar-color: rgba(241,168,54,.2) transparent;
}
.calc-body::-webkit-scrollbar { width: 4px; }
.calc-body::-webkit-scrollbar-track { background: transparent; }
.calc-body::-webkit-scrollbar-thumb { background: rgba(241,168,54,.2); border-radius: 10px; }

/* ─── Steps ────────────────────────────────────────────────── */
.calc-step {
    display: none;
    animation: calcFadeIn .35s ease;
}
.calc-step.active { display: block; }

@keyframes calcFadeIn {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ─── Navigation buttons ───────────────────────────────────── */
.calc-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    margin-top: 28px;
    padding-top: 18px;
    border-top: 1px solid rgba(255,255,255,.06);
}

.calc-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    font-family: var(--font-primary);
    font-weight: 600;
    font-size: .9rem;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: .06em;
}

.calc-btn-primary {
    background: linear-gradient(135deg, var(--color-accent), #e09120);
    color: var(--color-dark);
    box-shadow: 0 4px 15px rgba(241, 168, 54, .25);
}
.calc-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(241, 168, 54, .35);
}
.calc-btn-primary:disabled {
    opacity: .4;
    cursor: not-allowed;
    transform: none;
}

.calc-btn-secondary {
    background: transparent;
    color: var(--color-gray-400);
    border: 1px solid rgba(255,255,255,.12);
}
.calc-btn-secondary:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.calc-btn-success {
    background: linear-gradient(135deg, #22c55e, #16a34a);
    color: #fff;
    box-shadow: 0 4px 15px rgba(34, 197, 94, .25);
}
.calc-btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(34, 197, 94, .35);
}

/* ─── Progress bar ─────────────────────────────────────────── */
.calc-progress {
    display: flex;
    gap: 6px;
    margin-bottom: 24px;
}
.calc-progress-step {
    flex: 1;
    height: 3px;
    border-radius: 2px;
    background: rgba(255,255,255,.08);
    transition: background .4s ease;
}
.calc-progress-step.active {
    background: var(--color-accent);
}
.calc-progress-step.done {
    background: #22c55e;
}

/* ─── Cards / Options ──────────────────────────────────────── */
.calc-option-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
}

.calc-option-card {
    background: rgba(255,255,255,.03);
    border: 1px solid rgba(255,255,255,.08);
    border-radius: var(--radius-lg);
    padding: 20px 18px;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

.calc-option-card:hover {
    background: rgba(241, 168, 54, .06);
    border-color: rgba(241, 168, 54, .3);
    transform: translateY(-2px);
}

.calc-option-card.selected {
    background: rgba(241, 168, 54, .1);
    border-color: var(--color-accent);
    box-shadow: 0 0 20px rgba(241, 168, 54, .12);
}

.calc-option-card .icon {
    font-size: 32px;
    margin-bottom: 10px;
    display: block;
}
.calc-option-card h4 {
    font-family: var(--font-heading);
    font-size: 1rem;
    color: var(--color-white);
    margin-bottom: 4px;
    font-weight: 300;
}
.calc-option-card p {
    font-size: .8rem;
    color: var(--color-gray-500);
    margin: 0;
}

/* ─── Form Controls ────────────────────────────────────────── */
.calc-field {
    margin-bottom: 18px;
}

.calc-field label {
    display: block;
    font-size: .8rem;
    font-weight: 600;
    color: var(--color-gray-400);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: .04em;
}

.calc-field input,
.calc-field select {
    width: 100%;
    padding: 12px 16px;
    background: rgba(255,255,255,.04);
    border: 1px solid rgba(255,255,255,.1);
    border-radius: var(--radius-sm);
    color: var(--color-white);
    font-family: var(--font-primary);
    font-size: .95rem;
    font-weight: 500;
    outline: none;
    transition: var(--transition);
}

.calc-field input:focus,
.calc-field select:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(241, 168, 54, .1);
}

/* Ocultar flechas de input number */
.calc-field input[type="number"]::-webkit-inner-spin-button,
.calc-field input[type="number"]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}
.calc-field input[type="number"] {
    -moz-appearance: textfield;
}

.calc-field input::placeholder {
    color: var(--color-gray-600);
}

.calc-field select option {
    background: var(--color-dark);
    color: var(--color-white);
}

/* Ocultar flechitas de inputs numéricos en la calculadora */
#calc-consumo::-webkit-inner-spin-button,
#calc-consumo::-webkit-outer-spin-button,
#calc-custom-w::-webkit-inner-spin-button,
#calc-custom-w::-webkit-outer-spin-button,
#calc-custom-horas::-webkit-inner-spin-button,
#calc-custom-horas::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}
#calc-consumo,
#calc-custom-w,
#calc-custom-horas {
    -moz-appearance: textfield;
    appearance: textfield;
}

.calc-field .error {
    font-size: .75rem;
    color: #ef4444;
    margin-top: 4px;
    display: none;
}
.calc-field .error.show { display: block; }

.calc-field input.error-border,
.calc-field select.error-border {
    border-color: #ef4444;
}

/* ─── Results ──────────────────────────────────────────────── */
.calc-results {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 14px;
    margin: 20px 0;
}

.calc-result-card {
    background: rgba(255,255,255,.04);
    border: 1px solid rgba(255,255,255,.08);
    border-radius: var(--radius-lg);
    padding: 20px;
    text-align: center;
}

.calc-result-card .label {
    font-size: .7rem;
    font-weight: 600;
    color: var(--color-gray-500);
    text-transform: uppercase;
    letter-spacing: .06em;
    margin-bottom: 6px;
}

.calc-result-card .value {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 300;
    color: var(--color-accent);
}

.calc-result-card .value .unit {
    font-size: .85rem;
    color: var(--color-gray-500);
}

.calc-result-card.highlight {
    background: rgba(241, 168, 54, .08);
    border-color: rgba(241, 168, 54, .2);
}

/* ─── Equipment list ───────────────────────────────────────── */
.calc-equip-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 8px;
    margin-bottom: 18px;
}

.calc-equip-item {
    background: rgba(255,255,255,.03);
    border: 1px solid rgba(255,255,255,.08);
    border-radius: var(--radius-sm);
    padding: 10px 12px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: .82rem;
    font-weight: 500;
    color: var(--color-gray-300);
}

.calc-equip-item:hover {
    background: rgba(241, 168, 54, .06);
    border-color: rgba(241, 168, 54, .2);
}

.calc-equip-item.selected {
    background: rgba(34, 197, 94, .1);
    border-color: #22c55e;
    color: #22c55e;
}

.calc-equip-item .equip-icon {
    font-size: 18px;
    flex-shrink: 0;
}

.calc-equip-item .equip-check {
    margin-left: auto;
    color: #22c55e;
    display: none;
}
.calc-equip-item.selected .equip-check { display: block; }

/* ─── Selected equipment list ──────────────────────────────── */
.calc-selected-list {
    background: rgba(255,255,255,.03);
    border: 1px solid rgba(255,255,255,.08);
    border-radius: var(--radius-lg);
    padding: 16px;
    margin-bottom: 16px;
    max-height: 260px;
    overflow-y: auto;
}

.calc-selected-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 4px;
    border-bottom: 1px solid rgba(255,255,255,.05);
    font-size: .85rem;
}

.calc-selected-item:last-child { border-bottom: none; }

.calc-selected-item .name {
    color: var(--color-gray-200);
    font-weight: 500;
}

.calc-selected-item .qty {
    display: flex;
    align-items: center;
    gap: 8px;
}

.calc-selected-item .qty button {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    border: 1px solid rgba(255,255,255,.12);
    background: transparent;
    color: var(--color-gray-400);
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

/* ─── Custom load quantity buttons (same style) ───────────── */
.calc-qty-control {
    display: flex;
    align-items: center;
    gap: 8px;
}

.calc-qty-control button {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    border: 1px solid rgba(255,255,255,.12);
    background: transparent;
    color: var(--color-gray-400);
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}
.calc-qty-control button:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.calc-qty-control span {
    min-width: 20px;
    text-align: center;
    font-weight: 600;
    color: var(--color-white);
}
.calc-selected-item .qty button:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.calc-selected-item .qty span {
    min-width: 20px;
    text-align: center;
    font-weight: 600;
    color: var(--color-white);
}

.calc-selected-item .remove {
    color: #ef4444;
    cursor: pointer;
    font-size: 16px;
    opacity: .6;
    transition: var(--transition);
    background: none;
    border: none;
    padding: 4px;
}
.calc-selected-item .remove:hover { opacity: 1; }

/* ─── Contact Form ─────────────────────────────────────────── */
.calc-form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 10px;
}

@media (max-width: 600px) {
    .calc-form-row { grid-template-columns: 1fr; }
}

.calc-form-row .calc-field {
    margin-bottom: 0;
}

/* ─── Custom Load Form ─────────────────────────────────────── */
.calc-custom-load-section {
    margin: 20px 0;
    padding: 18px;
    background: rgba(255,255,255,.03);
    border: 1px solid rgba(255,255,255,.08);
    border-radius: var(--radius-lg);
}

.calc-custom-form {
    display: grid;
    grid-template-columns: 1fr 110px 110px 100px auto;
    gap: 10px;
    align-items: end;
    margin-bottom: 12px;
}

@media (max-width: 680px) {
    .calc-custom-form {
        grid-template-columns: 1fr 1fr;
    }
}

.calc-custom-input {
    width: 100%;
    padding: 12px 14px;
    background: rgba(255,255,255,.04);
    border: 1px solid rgba(255,255,255,.1);
    border-radius: var(--radius-sm);
    color: var(--color-white);
    font-family: var(--font-primary);
    font-size: .9rem;
    font-weight: 500;
    outline: none;
    transition: var(--transition);
    box-sizing: border-box;
}

.calc-custom-input:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(241, 168, 54, .1);
}

.calc-custom-input::placeholder {
    color: var(--color-gray-600);
}

.calc-custom-list {
    margin-top: 8px;
}

.calc-custom-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 10px;
    background: rgba(255,255,255,.04);
    border-radius: var(--radius-sm);
    margin-bottom: 4px;
    font-size: .82rem;
    color: var(--color-gray-300);
}

.calc-custom-item button {
    background: none;
    border: none;
    color: #ef4444;
    cursor: pointer;
    font-size: 14px;
    opacity: .6;
    padding: 4px;
    transition: var(--transition);
}

.calc-custom-item button:hover { opacity: 1; }

/* ─── Live Indicators ──────────────────────────────────────── */
.calc-indicators {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 10px;
    margin: 16px 0;
    padding: 16px;
    background: rgba(255,255,255,.03);
    border: 1px solid rgba(255,255,255,.08);
    border-radius: var(--radius-lg);
}

.indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 8px 4px;
}

.ind-label {
    font-size: .7rem;
    font-weight: 600;
    color: var(--color-gray-500);
    text-transform: uppercase;
    letter-spacing: .04em;
    margin-bottom: 4px;
}

.ind-value {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 300;
    color: var(--color-accent);
}

.ind-value small {
    font-size: .7rem;
    color: var(--color-gray-500);
}

.indicator.highlight {
    background: rgba(241, 168, 54, .08);
    border-radius: var(--radius-sm);
    padding: 8px 12px;
}

/* ─── Backup Specs ─────────────────────────────────────────── */
.calc-backup-specs {
    background: rgba(255,255,255,.03);
    border: 1px solid rgba(255,255,255,.08);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 20px;
}

.calc-backup-specs h4 {
    font-family: var(--font-heading);
    color: var(--color-accent);
    font-size: 1rem;
    font-weight: 300;
    margin-bottom: 16px;
    letter-spacing: .03em;
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
}

.spec-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.spec-label {
    font-size: .72rem;
    font-weight: 600;
    color: var(--color-gray-500);
    text-transform: uppercase;
    letter-spacing: .04em;
}

.spec-value {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 300;
    color: var(--color-white);
}

.spec-value.accent {
    color: var(--color-accent);
}

/* ─── Summary step ─────────────────────────────────────────── */
.calc-summary {
    background: rgba(255,255,255,.03);
    border: 1px solid rgba(255,255,255,.08);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 20px;
}

.calc-summary h4 {
    font-family: var(--font-heading);
    color: var(--color-accent);
    font-size: 1rem;
    font-weight: 300;
    margin-bottom: 16px;
    letter-spacing: .03em;
}

.calc-summary-line {
    display: flex;
    justify-content: space-between;
    padding: 6px 0;
    font-size: .85rem;
    border-bottom: 1px solid rgba(255,255,255,.04);
}

.calc-summary-line:last-child { border-bottom: none; }

.calc-summary-line .label { color: var(--color-gray-400); }
.calc-summary-line .value { color: var(--color-white); font-weight: 600; }
.calc-summary-line .value.accent { color: var(--color-accent); }

/* ─── Success screen ───────────────────────────────────────── */
.calc-success {
    text-align: center;
    padding: 40px 20px;
}

.calc-success .big-icon {
    text-align: center;
    font-size: 64px;
    margin-bottom: 20px;
}

.calc-success h3 {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    color: var(--color-white);
    margin-bottom: 10px;
    font-weight: 300;
}

.calc-success p {
    color: var(--color-gray-400);
    font-size: .95rem;
    max-width: 480px;
    margin: 0 auto 24px;
    line-height: 1.7;
}

.calc-success .btn-group {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ─── Custom Load (Carga Manual) ──────────────────────────── */
.calc-custom-load-section {
    margin-top: 20px;
    padding-top: 18px;
    border-top: 1px solid rgba(255,255,255,.06);
}

@media (max-width: 700px) {
    .calc-custom-form {
        grid-template-columns: 1fr 1fr;
    }
    .calc-custom-form .calc-custom-input:nth-child(1) { grid-column: 1 / -1; }
    .calc-custom-form .calc-btn { grid-column: 1 / -1; }
}

.calc-custom-input {
    width: 100%;
    padding: 12px 14px;
    background: rgba(255,255,255,.04);
    border: 1px solid rgba(255,255,255,.1);
    border-radius: var(--radius-sm);
    color: var(--color-white);
    font-family: var(--font-primary);
    font-size: .9rem;
    font-weight: 500;
    outline: none;
    transition: var(--transition);
    box-sizing: border-box;
}

.calc-custom-input:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(241, 168, 54, .1);
}

.calc-custom-input::placeholder {
    color: var(--color-gray-600);
}

/* ─── Custom Load List ──────────────────────────────────── */
.calc-custom-list {
    margin-bottom: 10px;
}

.calc-custom-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    background: rgba(255,255,255,.03);
    border: 1px solid rgba(255,255,255,.06);
    border-radius: var(--radius-sm);
    font-size: .82rem;
    color: var(--color-gray-300);
    margin-bottom: 6px;
}

.calc-custom-item button {
    background: none;
    border: none;
    color: #ef4444;
    cursor: pointer;
    font-size: 16px;
    opacity: .6;
    padding: 4px 8px;
    transition: var(--transition);
}
.calc-custom-item button:hover { opacity: 1; }

/* ─── Indicators en vivo ───────────────────────────────── */
.calc-indicators {
    background: rgba(255,255,255,.03);
    border: 1px solid rgba(255,255,255,.08);
    border-radius: var(--radius-lg);
    padding: 16px 18px;
    margin-bottom: 18px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 12px;
}

.indicator {
    text-align: center;
}

.indicator .ind-label {
    display: block;
    font-size: .65rem;
    font-weight: 600;
    color: var(--color-gray-500);
    text-transform: uppercase;
    letter-spacing: .04em;
    margin-bottom: 4px;
}

.indicator .ind-value {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 300;
    color: var(--color-accent);
}

.indicator .ind-value small {
    font-size: .7rem;
    color: var(--color-gray-500);
    font-family: var(--font-primary);
}

.indicator.highlight .ind-value {
    color: #22c55e;
}

/* ─── Backup Specs ──────────────────────────────────────── */
.calc-backup-specs {
    background: rgba(255,255,255,.03);
    border: 1px solid rgba(255,255,255,.08);
    border-radius: var(--radius-lg);
    padding: 20px 24px;
    margin: 20px 0;
}

.calc-backup-specs h4 {
    font-family: var(--font-heading);
    color: var(--color-accent);
    font-size: 1rem;
    font-weight: 300;
    margin-bottom: 16px;
    letter-spacing: .03em;
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
}

.spec-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 12px 14px;
    background: rgba(255,255,255,.03);
    border-radius: var(--radius-sm);
}

.spec-item .spec-label {
    font-size: .7rem;
    font-weight: 600;
    color: var(--color-gray-500);
    text-transform: uppercase;
    letter-spacing: .04em;
}

.spec-item .spec-value {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 300;
    color: var(--color-white);
}

.spec-item .spec-value.accent {
    color: var(--color-accent);
}

.calc-selected-item .detail {
    font-size: .72rem;
    color: var(--color-gray-500);
    display: none;
}

@media (min-width: 600px) {
    .calc-selected-item .detail {
        display: inline;
    }
}

/* ─── Responsive ───────────────────────────────────────────── */
@media (max-width: 768px) {
    .calc-modal {
        width: 100vw;
        max-height: 100vh;
        border-radius: 0;
    }
    .calc-body { padding: 16px 18px; }
    .calc-header { padding: 14px 18px; }
    .calc-header h2 { font-size: 1rem; }
    .calc-option-grid { grid-template-columns: 1fr 1fr; }
    .calc-results { grid-template-columns: 1fr 1fr; }
}