/* ============================================================
   IKARION — Páginas de sistemas (SISTEMAS/*.html)
   Pestañas Explicación / Simulador + diagrama 3D + contenido
   ============================================================ */

/* ---------- Breadcrumb ---------- */
.system-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.system-breadcrumb a {
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color 0.2s;
}

.system-breadcrumb a:hover {
  color: var(--color-accent);
}

.system-breadcrumb__sep {
  color: var(--color-text-muted);
  user-select: none;
}

.system-breadcrumb__current {
  color: var(--color-text-primary);
}

/* ---------- Hero con imagen ---------- */
.system-hero {
  padding-top: 4.2rem;
  padding-bottom: 3.5rem;
}

.system-hero__grid {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 2.6rem;
  align-items: center;
}

.system-hero__image-wrap img {
  width: 100%;
  height: 390px;
  border-radius: var(--radius-lg);
  object-fit: cover;
  object-position: center;
  box-shadow: var(--shadow-card);
}

.system-hero .section-label {
  margin-bottom: var(--space-2);
}

.system-hero__content h1 {
  font-size: clamp(2.25rem, 4vw, 3.75rem);
  line-height: 1.02;
  margin-bottom: var(--space-3);
}

.system-hero__tagline {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  max-width: 520px;
  line-height: var(--leading-relaxed);
  margin-bottom: 0;
}

.system-hero__content .system-tabs {
  margin-top: var(--space-6);
}

/* ---------- Pestañas ---------- */
.system-tabs {
  display: flex;
  gap: var(--space-2);
  border-bottom: 1px solid var(--color-border);
  margin-top: var(--space-6);
}

.system-tabs__tab {
  appearance: none;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--color-text-secondary);
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  padding: var(--space-3) var(--space-5);
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
}

.system-tabs__tab:hover {
  color: var(--color-text-primary);
}

.system-tabs__tab.is-active {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

a.system-tabs__tab--link {
  text-decoration: none;
  display: inline-block;
}

.system-panel {
  display: none;
}

.system-panel.is-active {
  display: block;
}

/* ---------- Fase 2: Diagrama 3D interactivo (Three.js) ---------- */
.system-diagram {
  position: relative;
  margin: var(--space-8) 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: transparent;
}

.system-diagram__stage {
  position: relative;
  width: 100%;
  height: 620px;
  overflow: hidden;
  background: transparent;
}

.system-diagram__stage canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.system-diagram__scenarios {
  position: absolute;
  top: var(--space-4);
  left: var(--space-4);
  right: var(--space-4);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  z-index: 2;
}

.system-diagram__scenarios button {
  appearance: none;
  background: rgba(13, 13, 13, 0.72);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  padding: var(--space-2) var(--space-4);
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s, color 0.2s;
}

.system-diagram__scenarios button:hover {
  border-color: var(--color-accent);
}

.system-diagram__scenarios button.is-active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-text-on-accent);
}

.system-diagram__scenarios--hybrid {
  align-items: center;
  gap: var(--space-3);
}

.diagram-scenario-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.diagram-blackout-btn {
  appearance: none;
  background: rgba(13, 13, 13, 0.72);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border: 1.5px solid rgba(255, 90, 90, 0.55);
  border-radius: var(--radius-full);
  color: #ffb4b4;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  padding: var(--space-2) var(--space-4);
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}

.diagram-blackout-btn:hover {
  border-color: #ff7070;
  color: #ffd0d0;
}

.diagram-blackout-btn.is-active {
  background: rgba(180, 40, 40, 0.88);
  border-color: #ff7070;
  color: #fff;
}

/* Medidores flotantes sobre el canvas */
.diagram-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 3;
}

.diagram-meter {
  position: absolute;
  transform: translate(-50%, -100%);
  min-width: 118px;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  background: rgba(13, 13, 13, 0.82);
  border: 1px solid var(--color-border);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
  text-align: center;
  transition: opacity 0.25s ease;
}

.diagram-meter::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: -7px;
  width: 12px;
  height: 12px;
  background: rgba(13, 13, 13, 0.82);
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  transform: translateX(-50%) rotate(45deg);
}

.diagram-meter__label {
  display: block;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  margin-bottom: 2px;
}

.diagram-meter__value {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--font-bold);
  color: var(--color-accent);
  line-height: 1.1;
}

.diagram-meter--export .diagram-meter__value {
  color: var(--color-accent);
}

.diagram-meter--import .diagram-meter__value {
  color: #7ec8ff;
}

.diagram-meter--off .diagram-meter__value {
  color: #ff8a8a;
  font-size: var(--text-sm);
}

/* Barra de consumo de la casa (0–5 kW) */
.diagram-consumption {
  position: absolute;
  transform: translate(-50%, -100%);
  width: 148px;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  background: rgba(13, 13, 13, 0.88);
  border: 1px solid var(--color-border);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
  text-align: left;
}

.diagram-consumption::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: -7px;
  width: 12px;
  height: 12px;
  background: rgba(13, 13, 13, 0.88);
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  transform: translateX(-50%) rotate(45deg);
}

.diagram-consumption__label {
  display: block;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

.diagram-consumption__track {
  height: 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  overflow: hidden;
  margin-bottom: var(--space-2);
}

.diagram-consumption__fill {
  height: 100%;
  width: 0;
  border-radius: inherit;
  background: linear-gradient(90deg, #6a9418, var(--color-accent));
  transition: width 0.55s ease, background 0.35s ease;
}

.diagram-consumption--empty .diagram-consumption__fill {
  width: 0 !important;
  background: rgba(255, 255, 255, 0.12);
}

.diagram-consumption__value {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--font-bold);
  color: var(--color-accent);
  line-height: 1.1;
  transition: color 0.35s ease;
}

.diagram-consumption--empty .diagram-consumption__value {
  color: var(--color-text-secondary);
}

.diagram-consumption__scale {
  display: block;
  margin-top: 2px;
  font-family: var(--font-body);
  font-size: 0.65rem;
  color: rgba(255, 255, 255, 0.35);
  letter-spacing: 0.02em;
}

.diagram-consumption--diagram-side {
  transform: translate(12px, -54%);
}

.diagram-consumption--diagram-side::after {
  display: none;
}

.diagram-meter--diagram-side {
  transform: translate(-50%, calc(-100% - 8px));
}

.diagram-meter--diagram-side::after {
  display: none;
}

.diagram-slot-label {
  position: absolute;
  transform: translate(-50%, -50%);
  padding: 2px 10px;
  border-radius: var(--radius-full);
  background: rgba(13, 13, 13, 0.55);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.82);
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: var(--font-semibold);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  pointer-events: none;
  white-space: nowrap;
}

.system-diagram__caption {
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--color-border);
  background: rgba(13, 13, 13, 0.5);
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  min-height: 3.6em;
  opacity: 1;
  transition: opacity 0.35s ease;
}

.system-diagram__caption.is-visible {
  opacity: 1;
}

.system-diagram__hint {
  position: absolute;
  bottom: var(--space-3);
  right: var(--space-4);
  z-index: 2;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.55);
  background: rgba(13, 13, 13, 0.55);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  pointer-events: none;
}

/* ---------- Contenido explicativo ---------- */
.system-block .section-header {
  margin-bottom: var(--space-6);
}

.system-block .section-header h2 {
  max-width: none;
}

.system-section__lead {
  font-family: var(--font-body);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  max-width: 720px;
  margin-bottom: var(--space-4);
  font-size: var(--text-base);
}

.system-explain-split {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: flex-end;
  gap: clamp(1.5rem, 4vw, 3rem);
  margin-top: var(--space-2);
  margin-left: auto;
  width: 100%;
  max-width: min(640px, 100%);
}

.system-explain-split .system-section__lead {
  margin-bottom: 0;
  max-width: min(480px, 55vw);
  text-align: right;
}

.system-explain-split__image {
  flex-shrink: 0;
  width: clamp(96px, 10vw, 132px);
  height: auto;
  object-fit: contain;
}

/* Analogía destacada */
.system-analogy {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-md);
  padding: var(--space-5) var(--space-6);
  margin: var(--space-6) 0 0;
  max-width: 720px;
}

.system-analogy .icon-accent {
  margin-top: 0.35rem;
}

.system-analogy p {
  margin: 0;
  font-size: var(--text-base);
  color: var(--color-text-primary);
  line-height: var(--leading-relaxed);
}

/* Pasos numerados — layout zigzag, integrado al fondo */
.system-steps {
  counter-reset: step;
  display: grid;
  gap: 0;
  list-style: none;
  padding: 0;
  margin: 0;
}

.system-steps li {
  counter-increment: step;
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: center;
  padding: var(--space-10) 0;
  background: transparent;
  border: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 0;
}

.system-steps li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.system-steps li:first-child {
  padding-top: var(--space-4);
}

.system-steps li::before {
  content: none;
}

.system-step--reverse .system-step-flow {
  order: 2;
}

.system-step--reverse .system-step__body {
  order: 1;
  text-align: right;
  border-left: none;
  border-right: 2px solid var(--color-accent);
  padding-left: 0;
  padding-right: var(--space-5);
}

.system-step__body {
  padding-top: 0;
  border-left: 2px solid var(--color-accent);
  padding-left: var(--space-5);
}

.system-step__body::before {
  content: counter(step, decimal-leading-zero);
  display: block;
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: var(--font-bold);
  color: var(--color-accent);
  letter-spacing: 0.06em;
  line-height: 1;
  margin-bottom: var(--space-4);
}

.system-steps li strong {
  display: block;
  color: var(--color-text-primary);
  font-family: var(--font-heading);
  font-size: clamp(1.3rem, 2.1vw, 1.85rem);
  font-weight: var(--font-bold);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
}

.system-steps li span {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  max-width: 38ch;
}

.system-step--reverse .system-step__body span {
  margin-left: auto;
}

/* Componentes del sistema */
.system-parts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--grid-gap);
}

.system-part {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  transition: border-color 0.2s;
}

.system-part:hover {
  border-color: var(--color-accent);
}

.system-part .icon-accent {
  margin-bottom: var(--space-3);
}

.system-part h3 {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.system-part p {
  font-size: var(--text-sm);
  margin: 0;
}

/* Pros / contras */
.system-proscons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--grid-gap-lg);
}

.system-proscons__col {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-5) var(--space-6);
}

.system-proscons__col h3 {
  font-size: var(--text-base);
  margin-bottom: var(--space-4);
  color: var(--color-text-primary);
}

.system-proscons__col ul {
  display: grid;
  gap: var(--space-3);
}

.system-proscons__col li {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

.system-proscons__col li::before {
  content: '✓';
  flex-shrink: 0;
  color: var(--color-accent);
  font-weight: var(--font-bold);
}

.system-proscons__col--cons li::before {
  content: '—';
  color: var(--color-text-muted);
}

/* FAQ */
.system-block:has(.system-faq) .section-header {
  text-align: center;
  max-width: 36rem;
  margin-inline: auto;
}

.system-faq {
  display: grid;
  gap: var(--space-2);
  max-width: 36rem;
  margin-inline: auto;
}

.system-faq details {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
}

.system-faq details[open] {
  border-color: var(--color-accent);
}

.system-faq summary {
  cursor: pointer;
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-primary);
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: var(--space-2);
  line-height: 1.35;
}

.system-faq summary::-webkit-details-marker {
  display: none;
}

.system-faq summary::after {
  content: '+';
  color: var(--color-accent);
  font-weight: var(--font-bold);
  font-size: 0.95rem;
  flex-shrink: 0;
}

.system-faq details[open] summary::after {
  content: '–';
}

.system-faq details p {
  margin: var(--space-2) 0 0;
  font-size: 0.8125rem;
  line-height: 1.55;
  color: var(--color-text-secondary);
}

/* CTA banner (páginas de sistemas) */
.cta-banner--systems {
  position: relative;
  min-height: 350px;
  display: flex;
  align-items: center;
  background-image: url("../../assets/hero-bg.jpg");
  background-size: cover;
  background-position: center;
}

.cta-banner--systems .cta-banner__overlay {
  position: absolute;
  inset: 0;
  background: var(--color-overlay);
}

.cta-banner--systems .cta-banner__inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
  flex-wrap: wrap;
}

.cta-banner--systems h2 {
  font-size: clamp(2rem, 3.2vw, 3rem);
  max-width: 480px;
  line-height: 1.06;
}

.cta-banner--systems .cta-banner__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: center;
}

/* Otros sistemas */
.system-related {
  padding-top: var(--space-10);
  padding-bottom: var(--space-16);
}

.system-related .section-header {
  margin-bottom: var(--space-8);
}

.system-related__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--grid-gap);
}

.system-related .service-card__image {
  height: 160px;
  object-fit: cover;
}

/* ---------- Panel del simulador ---------- */
.system-sim {
  margin: var(--space-8) 0 var(--space-12);
}

.system-sim__frame {
  width: 100%;
  height: min(80vh, 820px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-bg-card);
}

.system-sim__actions {
  display: flex;
  justify-content: flex-end;
  margin-top: var(--space-3);
}

/* Simulador aún no disponible */
.system-sim--soon {
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-16) var(--space-6);
  text-align: center;
}

.system-sim--soon h2 {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-3);
}

.system-sim--soon p {
  font-family: var(--font-body);
  color: var(--color-text-secondary);
  max-width: 520px;
  margin: 0 auto var(--space-6);
  line-height: var(--leading-relaxed);
}

/* ---------- Responsive ---------- */
@media (max-width: 992px) {
  .system-hero__grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .system-hero__image-wrap img {
    height: 280px;
  }

  .system-related__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 768px) {
  .system-hero__content h1 {
    font-size: var(--text-3xl);
  }

  .system-diagram__stage {
    height: 420px;
  }

  .system-steps li {
    grid-template-columns: 1fr;
    gap: var(--space-5);
    padding: var(--space-8) 0;
  }

  .system-step--reverse .system-step-flow,
  .system-step--reverse .system-step__body {
    order: unset;
    text-align: left;
    border-right: none;
    border-left: 2px solid var(--color-accent);
    padding-right: 0;
    padding-left: var(--space-4);
  }

  .system-step__body span {
    max-width: none;
  }

  .system-step--reverse .system-step__body span {
    margin-left: 0;
  }

  .system-proscons {
    grid-template-columns: 1fr;
  }

  .system-tabs__tab {
    flex: 1;
    padding: var(--space-3) var(--space-2);
    text-align: center;
  }

  .system-sim__frame {
    height: 70vh;
  }

  .cta-banner--systems .cta-banner__inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .system-related__grid {
    grid-template-columns: 1fr;
  }

  .system-explain-split {
    flex-direction: column;
    align-items: flex-end;
    max-width: 100%;
  }

  .system-explain-split .system-section__lead {
    max-width: 100%;
  }

  .system-explain-split__image {
    align-self: flex-end;
  }
}