/* ============================================================
   sections.css — layout de cada sección de la landing
   ============================================================ */

/* ---------------- Preloader ---------------- */

.preloader {
  position: fixed;
  inset: 0;
  z-index: var(--z-preloader);
  display: grid;
  place-items: center;
  background: var(--void);
}

.preloader__inner {
  display: grid;
  justify-items: center;
  gap: var(--sp-6);
}

.preloader__volts {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(4rem, 12vw, 8rem);
  line-height: 1;
  color: var(--chalk);
  font-variant-numeric: tabular-nums;
}

.preloader__volts .unit {
  color: var(--ember);
  font-size: 0.5em;
}

/* llave térmica */
.breaker {
  width: 46px;
  height: 78px;
  border: 2px solid var(--line-strong);
  border-radius: 8px;
  position: relative;
  background: var(--carbon);
}

.breaker__lever {
  position: absolute;
  left: 50%;
  top: 8px;
  width: 18px;
  height: 28px;
  border-radius: 4px;
  background: var(--ash);
  transform: translateX(-50%) translateY(30px);
  transition: transform 0.28s var(--ease-spark), background 0.28s;
}

.preloader.is-on .breaker__lever {
  transform: translateX(-50%) translateY(0);
  background: var(--ember);
  box-shadow: 0 0 22px var(--ember-glow);
}

.preloader__label {
  font-size: var(--text-xs);
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--ash);
}

/* flash de encendido */
.preloader__flash {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 55%, var(--ember) 0%, transparent 62%);
  opacity: 0;
  pointer-events: none;
}

/* ---------------- Línea viva (spine SVG) ---------------- */

.spine {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: visible;
}

.spine path {
  fill: none;
  stroke: var(--ember);
  stroke-width: 1.5;
  opacity: 0.55;
  filter: drop-shadow(0 0 6px var(--ember-glow));
}

.spine .spine__pulse {
  fill: var(--amber);
  filter: drop-shadow(0 0 10px var(--ember));
}

@media (max-width: 860px) {
  .spine {
    display: none;
  }
}

/* ---------------- Hero ---------------- */

.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  align-content: center;
  padding-block: clamp(7rem, 16vh, 11rem) var(--sp-16);
  overflow: clip;
  /* rejilla de tablero eléctrico, casi imperceptible */
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 72px 72px;
}

.hero::after {
  /* viñeta para que la rejilla desaparezca hacia los bordes */
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 42%, transparent 30%, var(--void) 82%);
  pointer-events: none;
}

.hero > .container {
  position: relative;
  z-index: 1;
}

/* foto de fondo: torre de transmisión en duotono carbón */
.hero__photo {
  position: absolute;
  inset: 0;
  background: url("../assets/images/hero-tower.webp") center 28% / cover no-repeat;
  filter: grayscale(1) contrast(1.15) brightness(0.5);
  opacity: 0.34;
  pointer-events: none;
}

.hero__glow {
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: min(90vw, 900px);
  aspect-ratio: 1.6;
  background: radial-gradient(ellipse, var(--ember-dim), transparent 65%);
  pointer-events: none;
}

.hero__eyebrow {
  margin-bottom: var(--sp-6);
}

.hero__title {
  font-size: var(--text-hero);
  font-weight: 800;
  max-width: 12ch;
}

.hero__title .line {
  display: block;
  overflow: hidden;
  /* aire para la virgulilla de la Ñ, que sobresale de la caja de línea */
  padding-top: 0.14em;
  margin-top: -0.14em;
}

.hero__title .line > span {
  display: inline-block;
}

.hero__claim {
  margin-top: var(--sp-8);
  font-size: var(--text-lg);
  color: var(--smoke);
  max-width: 44ch;
}

.hero__claim em {
  font-style: normal;
  color: var(--chalk);
  font-weight: 600;
}

.hero__ctas {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-4);
  margin-top: var(--sp-12);
}

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-6) var(--sp-12);
  margin-top: clamp(3rem, 8vh, 5.5rem);
  padding-top: var(--sp-6);
  border-top: 1px solid var(--line);
  color: var(--ash);
  font-size: var(--text-sm);
}

.hero__meta strong {
  color: var(--smoke);
  font-weight: 600;
}

/* ---------------- Stats ---------------- */

.stats__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--sp-6);
  border-block: 1px solid var(--line);
}

.stats__grid .stat + .stat {
  border-left: 1px solid var(--line);
  padding-left: var(--sp-8);
}

@media (max-width: 700px) {
  .stats__grid {
    grid-template-columns: 1fr 1fr;
  }

  .stats__grid .stat:nth-child(odd) {
    border-left: none;
    padding-left: 0;
  }
}

/* ---------------- Timeline 50 años ---------------- */

.timeline {
  overflow: clip;
  /* trama de puntos, como papel de esquemático */
  background-image: radial-gradient(rgba(244, 241, 236, 0.05) 1px, transparent 1px);
  background-size: 26px 26px;
}

/* cabecera partida: texto + figura */
.section-head--split {
  grid-template-columns: 1.15fr 0.85fr;
  gap: clamp(2rem, 4vw, 4.5rem);
  align-items: end;
}

.section-head--split > div {
  display: grid;
  gap: var(--sp-4);
}

@media (max-width: 860px) {
  .section-head--split {
    grid-template-columns: 1fr;
  }
}

.about-figure {
  position: relative;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin: 0;
}

.about-figure img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  filter: grayscale(0.85) contrast(1.08) brightness(0.62);
  transition: filter var(--dur) var(--ease-out), transform 1.4s var(--ease-out);
}

.about-figure:hover img {
  filter: grayscale(0) brightness(0.85);
  transform: scale(1.03);
}

.about-figure figcaption {
  position: absolute;
  inset: auto 0 0 0;
  padding: var(--sp-6) var(--sp-6) var(--sp-4);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--smoke);
  background: linear-gradient(transparent, rgba(10, 10, 10, 0.88));
}

.about-figure .num {
  color: var(--ember);
}

.timeline__viewport {
  position: relative;
}

.timeline__track {
  display: flex;
  gap: clamp(2rem, 6vw, 6rem);
  padding-inline: var(--gutter);
  width: max-content;
  align-items: stretch;
}

.milestone {
  position: relative;
  flex: 0 0 auto;
  width: min(78vw, 26rem);
  padding: var(--sp-8) 0 var(--sp-8) var(--sp-8);
  border-left: 1px solid var(--line-strong);
}

.milestone::before {
  content: "";
  position: absolute;
  left: -5px;
  top: var(--sp-8);
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ember);
  box-shadow: 0 0 14px var(--ember-glow);
}

.milestone__year {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(3.4rem, 3rem + 4vw, 6.5rem);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px var(--line-strong);
  transition: color var(--dur-slow) var(--ease-out);
}

.milestone.is-lit .milestone__year {
  color: var(--ember);
  -webkit-text-stroke: 1px transparent;
}

.milestone h3 {
  margin-top: var(--sp-4);
  font-size: var(--text-lg);
  color: var(--chalk);
}

.milestone p {
  margin-top: var(--sp-3);
  color: var(--smoke);
  font-size: var(--text-sm);
  line-height: 1.6;
}

/* fallback vertical en mobile / reduced motion */
@media (max-width: 860px) {
  .timeline__track {
    flex-direction: column;
    width: auto;
    padding-inline: 0;
  }

  .milestone {
    width: auto;
  }

  .milestone__year {
    color: var(--ember);
    -webkit-text-stroke: 0;
  }
}

/* ---------------- Categorías ---------------- */

.cats__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 19rem), 1fr));
  gap: var(--sp-4);
}

.cat {
  position: relative;
  display: grid;
  gap: var(--sp-6);
  padding: var(--sp-8);
  min-height: 15rem;
  align-content: space-between;
}

/* foto que se revela al hover ("energizar" la card) */
.cat__photo {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  filter: grayscale(1) brightness(0.4) contrast(1.15);
  transform: scale(1.08);
  transition: opacity var(--dur) var(--ease-out), transform 1.4s var(--ease-out);
  pointer-events: none;
}

.cat:hover .cat__photo {
  opacity: 0.5;
  transform: scale(1.02);
}

.cat > :not(.cat__photo) {
  position: relative;
  z-index: 1;
}

@media (hover: none) {
  .cat__photo {
    opacity: 0.28;
    transform: none;
  }
}

.cat__icon {
  width: 52px;
  height: 52px;
  color: var(--smoke);
  transition: color var(--dur-fast) ease;
}

.cat__icon path,
.cat__icon circle,
.cat__icon rect,
.cat__icon line,
.cat__icon polyline {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.cat:hover .cat__icon {
  color: var(--ember);
}

/* al hover, el trazo se "energiza": se redibuja */
.cat:hover .cat__icon .draw {
  stroke-dasharray: 120;
  stroke-dashoffset: 120;
  animation: cat-draw 0.9s var(--ease-out) forwards;
}

@keyframes cat-draw {
  to {
    stroke-dashoffset: 0;
  }
}

.cat h3 {
  font-size: var(--text-xl);
}

.cat p {
  color: var(--smoke);
  font-size: var(--text-sm);
}

.cat__index {
  position: absolute;
  top: var(--sp-6);
  right: var(--sp-6);
  font-size: var(--text-xs);
  color: var(--ash);
  letter-spacing: 0.15em;
}

/* ---------------- Marcas ---------------- */

.brands {
  overflow: clip;
}

.brands__row {
  display: flex;
  width: max-content;
  gap: 0;
  margin-block: var(--sp-2);
}

.brands__group {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.brand {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  padding: var(--sp-6) clamp(1.4rem, 3vw, 2.8rem);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.5rem, 1.2rem + 1.6vw, 2.6rem);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--ash);
  white-space: nowrap;
  transition: color var(--dur-fast) ease, text-shadow var(--dur-fast) ease;
}

.brand:hover {
  color: var(--ember);
  text-shadow: 0 0 26px var(--ember-glow);
}

.brand::after {
  content: "•";
  margin-left: clamp(2.8rem, 6vw, 5.6rem);
  color: var(--line-strong);
  font-size: 0.5em;
}

/* ---------------- Reseñas ---------------- */

.reviews .section-head {
  grid-template-columns: 1fr auto;
  align-items: end;
}

@media (max-width: 700px) {
  .reviews .section-head {
    grid-template-columns: 1fr;
  }
}

/* ---------------- Blog / Instagram ---------------- */

.ig__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 18rem), 1fr));
  gap: var(--sp-4);
}

.ig-card {
  display: grid;
}

.ig-card__cover {
  position: relative;
  aspect-ratio: 4 / 3;
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at 70% 20%, var(--ember-dim), transparent 55%),
    var(--carbon);
  border-bottom: 1px solid var(--line);
}

.ig-card__cover svg {
  width: 64px;
  height: 64px;
  color: var(--ember);
  opacity: 0.9;
}

.ig-card__cover img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(0.9) contrast(1.05) brightness(0.75);
  transition: filter var(--dur) var(--ease-out);
}

.ig-card:hover .ig-card__cover img {
  filter: grayscale(0) brightness(0.92);
}

.ig-card__body {
  display: grid;
  gap: var(--sp-3);
  padding: var(--sp-6);
}

.ig-card__date {
  font-size: var(--text-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--ash);
}

.ig-card__excerpt {
  color: var(--smoke);
  font-size: var(--text-sm);
  line-height: 1.55;
}

.ig-card .link-arrow {
  margin-top: var(--sp-2);
}

/* ---------------- Sucursales ---------------- */

.branches__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 24rem), 1fr));
  gap: var(--sp-6);
}

.branch {
  display: grid;
}

.branch__map {
  aspect-ratio: 16 / 8;
  background: var(--carbon);
  border-bottom: 1px solid var(--line);
}

.branch__map iframe {
  width: 100%;
  height: 100%;
  border: 0;
  filter: grayscale(1) invert(0.92) contrast(0.9);
}

.branch__body {
  display: grid;
  gap: var(--sp-4);
  padding: var(--sp-8);
}

.branch__body h3 {
  font-size: var(--text-xl);
}

.branch__body h3 span {
  color: var(--ember);
}

.branch__rows {
  display: grid;
  gap: var(--sp-3);
  color: var(--smoke);
  font-size: var(--text-sm);
}

.branch__rows a:hover {
  color: var(--chalk);
}

.branch__rows svg {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
  color: var(--ember);
  margin-top: 3px;
}

.branch__rows > div {
  display: flex;
  gap: var(--sp-3);
  align-items: flex-start;
}

.branch .btn {
  justify-self: start;
  margin-top: var(--sp-2);
}

/* ---------------- CTA final ---------------- */

.cta {
  position: relative;
  overflow: clip;
}

.cta__panel {
  position: relative;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: clamp(2rem, 5vw, 5rem);
  padding: clamp(2.5rem, 5vw, 5rem);
  background: var(--steel);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.cta__panel::before {
  content: "";
  position: absolute;
  inset: -1px;
  background: var(--g-surface);
  pointer-events: none;
}

/* fondo: líneas de alta tensión al atardecer, muy atenuado */
.cta__photo {
  position: absolute;
  inset: 0;
  background: url("../assets/images/cta-lines.webp") center 68% / cover no-repeat;
  opacity: 0.15;
  filter: grayscale(0.3) brightness(0.75) contrast(1.1);
  pointer-events: none;
}

.cta__panel > :not(.cta__photo) {
  position: relative;
  z-index: 1;
}

/* ---------------- Separador esquemático ---------------- */

.schematic {
  display: block;
  width: 100%;
  height: auto;
  margin-top: clamp(3rem, 6vw, 5.5rem);
  color: var(--line-strong);
  overflow: visible;
}

.schematic path,
.schematic line {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  vector-effect: non-scaling-stroke;
}

.schematic .hot {
  stroke: var(--ember);
  filter: drop-shadow(0 0 5px var(--ember-glow));
}

.schematic circle {
  fill: var(--ember);
}

@media (max-width: 860px) {
  .cta__panel {
    grid-template-columns: 1fr;
  }
}

.cta__title {
  font-size: var(--text-2xl);
}

.cta__copy {
  margin-top: var(--sp-6);
  color: var(--smoke);
}

.cta__wa {
  margin-top: var(--sp-8);
}

.cta__form {
  position: relative;
  display: grid;
  gap: var(--sp-4);
  align-content: start;
}

.cta__form .btn {
  justify-self: start;
  margin-top: var(--sp-2);
}

.cta__note {
  font-size: var(--text-xs);
  color: var(--ash);
}

/* ---------------- Footer ---------------- */

.footer {
  border-top: 1px solid var(--line);
  padding-block: var(--sp-16) var(--sp-8);
  background: var(--carbon);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--sp-8);
}

@media (max-width: 860px) {
  .footer__grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 540px) {
  .footer__grid {
    grid-template-columns: 1fr;
  }
}

.footer__logo svg {
  height: 30px;
  width: auto;
}

.footer__tag {
  margin-top: var(--sp-4);
  color: var(--ash);
  font-size: var(--text-sm);
  max-width: 30ch;
}

.footer h4 {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ash);
  margin-bottom: var(--sp-4);
}

.footer ul {
  display: grid;
  gap: var(--sp-3);
  font-size: var(--text-sm);
  color: var(--smoke);
}

.footer ul a:hover {
  color: var(--chalk);
}

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--sp-4);
  margin-top: var(--sp-16);
  padding-top: var(--sp-6);
  border-top: 1px solid var(--line);
  color: var(--ash);
  font-size: var(--text-xs);
}