/* ===== Hero Slider ===== */
.hero {
  position: relative;
  height: 100svh;
  min-height: 600px;
  max-height: 900px;
  overflow: hidden;
  background: var(--color-blue-dark);
}
.hero__slides {
  position: absolute;
  inset: 0;
  display: flex;
}
.hero__slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.8s ease;
  background-size: cover;
  background-position: center;
}
.hero__slide.active { opacity: 1; }
.hero__slide::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    105deg,
    rgba(10, 25, 55, 0.82) 0%,
    rgba(10, 25, 55, 0.55) 55%,
    rgba(10, 25, 55, 0.3) 100%
  );
}

/* Slide backgrounds using inline SVG patterns as placeholder while real images load */
.hero__slide--1 { background-color: #0f2347; background-image: url('../images/hero-substations.webp'); }
.hero__slide--2 { background-color: #122040; background-image: url('../images/hero-lines.webp'); }
.hero__slide--3 { background-color: #0d1e3a; background-image: url('../images/hero-civil.webp'); }

.hero__content {
  position: relative;
  z-index: 2;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: 72px; /* nav height */
}
.hero__slides-text {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: 72px;
  z-index: 2;
}
.hero__slide-text {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: 72px;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.8s ease, transform 0.8s ease;
  pointer-events: none;
}
.hero__slide-text.active {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.hero__label {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-yellow);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.hero__label::before {
  content: '';
  display: block;
  width: 32px;
  height: 2px;
  background: var(--color-yellow);
  flex-shrink: 0;
}
.hero__title {
  font-size: var(--text-hero);
  font-weight: 800;
  color: #fff;
  max-width: 14ch;
  line-height: 1.1;
  margin-bottom: var(--space-6);
  text-shadow: 0 2px 20px rgba(0,0,0,0.3);
}
.hero__desc {
  font-size: var(--text-base);
  color: rgba(255,255,255,0.8);
  max-width: 52ch;
  line-height: 1.7;
  margin-bottom: var(--space-8);
}
.hero__actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

/* Slider Controls */
.hero__controls {
  position: absolute;
  bottom: var(--space-10);
  left: 0;
  right: 0;
  z-index: 3;
}
.hero__controls-inner {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}
.hero__dots {
  display: flex;
  gap: var(--space-2);
}
.hero__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255,255,255,0.35);
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
  border: none;
  padding: 0;
}
.hero__dot.active {
  background: var(--color-yellow);
  transform: scale(1.3);
}
.hero__arrows {
  display: flex;
  gap: var(--space-2);
  margin-left: auto;
}
.hero__arrow {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1.5px solid rgba(255,255,255,0.3);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), border-color var(--transition);
}
.hero__arrow:hover {
  background: rgba(255,255,255,0.15);
  border-color: rgba(255,255,255,0.6);
}
.hero__counter {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 600;
  color: rgba(255,255,255,0.5);
  letter-spacing: 0.1em;
}
.hero__counter strong { color: #fff; }

/* ===== Stats ===== */
.stats {
  background: var(--color-blue);
  padding-block: var(--space-16);
}
.stats__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-1);
}
.stat {
  padding: var(--space-8) var(--space-6);
  text-align: center;
  border-right: 1px solid rgba(255,255,255,0.1);
  position: relative;
}
.stat:last-child { border-right: none; }
.stat__icon {
  width: 40px;
  height: 40px;
  margin: 0 auto var(--space-4);
  color: var(--color-yellow);
  opacity: 0.9;
}
.stat__number {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  color: #fff;
  line-height: 1;
  margin-bottom: var(--space-2);
}
.stat__label {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.65);
  line-height: 1.4;
  max-width: 18ch;
  margin-inline: auto;
}

/* ===== Services preview ===== */
.services__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}
.service-card {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
  display: flex;
  flex-direction: column;
}
.service-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}
.service-card__img {
  height: 200px;
  background: var(--color-blue);
  position: relative;
  overflow: hidden;
}
.service-card__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.service-card:hover .service-card__img img { transform: scale(1.05); }
.service-card__num {
  position: absolute;
  top: var(--space-4);
  left: var(--space-4);
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-yellow);
  background: rgba(10,25,55,0.8);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
}
.service-card__body {
  padding: var(--space-6);
  flex: 1;
  display: flex;
  flex-direction: column;
}
.service-card__title {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-3);
  line-height: 1.3;
}
.service-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
  flex: 1;
  margin-bottom: var(--space-5);
}
.service-card__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-blue);
  transition: gap var(--transition), color var(--transition);
}
.service-card__link:hover {
  color: var(--color-blue-mid);
  gap: var(--space-3);
}

/* ===== Projects ===== */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-4);
}
.project-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-blue-dark);
  cursor: pointer;
}
.project-card--large { grid-column: span 7; min-height: 380px; }
.project-card--small { grid-column: span 5; min-height: 180px; }
.project-card--sm2 { grid-column: span 5; min-height: 180px; }
.project-card--med { grid-column: span 7; min-height: 200px; }

.project-card__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.project-card:hover .project-card__img { transform: scale(1.05); }

.project-card__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(10,25,55,0.92) 0%,
    rgba(10,25,55,0.4) 50%,
    transparent 100%
  );
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--space-6);
  transition: background var(--transition);
}
.project-card:hover .project-card__overlay {
  background: linear-gradient(
    to top,
    rgba(10,25,55,0.96) 0%,
    rgba(10,25,55,0.6) 60%,
    rgba(10,25,55,0.2) 100%
  );
}
.project-card__tag {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-yellow);
  margin-bottom: var(--space-2);
}
.project-card__title {
  font-size: var(--text-sm);
  font-weight: 700;
  color: #fff;
  line-height: 1.35;
}
.project-card--large .project-card__title { font-size: var(--text-lg); }

/* ===== News ===== */
.news__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin-bottom: var(--space-10);
}
.news-card {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
  display: flex;
  flex-direction: column;
}
.news-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}
.news-card__img {
  height: 180px;
  background: linear-gradient(135deg, var(--color-blue) 0%, var(--color-blue-mid) 100%);
  position: relative;
  overflow: hidden;
}
.news-card__img img { width: 100%; height: 100%; object-fit: cover; }
.news-card__body {
  padding: var(--space-5) var(--space-6);
  flex: 1;
  display: flex;
  flex-direction: column;
}
.news-card__date {
  font-size: var(--text-xs);
  color: var(--color-yellow);
  font-weight: 600;
  margin-bottom: var(--space-2);
  letter-spacing: 0.04em;
}
.news-card__title {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.4;
  margin-bottom: var(--space-3);
  flex: 1;
}
.news-card__excerpt {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: var(--space-4);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-card__link {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-blue);
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  transition: gap var(--transition);
}
.news-card__link:hover { gap: var(--space-2); }

.news__footer { text-align: center; }

/* ===== Partners ===== */
.partners__track {
  overflow: hidden;
  position: relative;
  padding-block: var(--space-8);
}
.partners__track::before,
.partners__track::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  width: 80px;
  z-index: 2;
}
.partners__track::before {
  left: 0;
  background: linear-gradient(to right, var(--color-surface), transparent);
}
.partners__track::after {
  right: 0;
  background: linear-gradient(to left, var(--color-surface), transparent);
}
.partners__inner {
  display: flex;
  gap: var(--space-12);
  align-items: center;
  animation: scroll-partners 28s linear infinite;
  width: max-content;
}
.partners__inner:hover { animation-play-state: paused; }
@keyframes scroll-partners {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}
.partner-logo {
  height: 48px;
  width: auto;
  max-width: 120px;
  object-fit: contain;
  filter: grayscale(1) opacity(0.55);
  transition: filter var(--transition);
  flex-shrink: 0;
}
.partner-logo:hover { filter: grayscale(0) opacity(1); }

/* Partner text fallback */
.partner-name {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-text-muted);
  white-space: nowrap;
  letter-spacing: 0.04em;
  transition: color var(--transition);
}
.partner-name:hover { color: var(--color-blue); }

/* ===== CTA Banner ===== */
.cta-banner {
  background: linear-gradient(135deg, var(--color-blue-dark) 0%, var(--color-blue) 100%);
  padding-block: clamp(var(--space-16), 8vw, var(--space-20));
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(245,195,0,0.08) 0%, transparent 70%);
  pointer-events: none;
}
.cta-banner__title {
  font-size: var(--text-2xl);
  font-weight: 800;
  color: #fff;
  margin-bottom: var(--space-4);
  position: relative;
}
.cta-banner__subtitle {
  font-size: var(--text-base);
  color: rgba(255,255,255,0.75);
  max-width: 52ch;
  margin-inline: auto;
  margin-bottom: var(--space-8);
  position: relative;
}
.cta-banner__actions {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
  position: relative;
}

/* ===== Footer ===== */
.footer {
  background: var(--color-blue-dark);
  color: rgba(255,255,255,0.7);
  padding-top: var(--space-16);
}
.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: var(--space-12);
  padding-bottom: var(--space-12);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer__logo { margin-bottom: var(--space-5); }
.footer__desc {
  font-size: var(--text-sm);
  line-height: 1.7;
  max-width: 30ch;
  color: rgba(255,255,255,0.55);
}
.footer__col-title {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-yellow);
  margin-bottom: var(--space-5);
}
.footer__nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.footer__nav a {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.6);
  transition: color var(--transition);
}
.footer__nav a:hover { color: #fff; }
.footer__contact-item {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.6);
  margin-bottom: var(--space-4);
}
.footer__contact-item svg {
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--color-yellow);
  opacity: 0.8;
}
.footer__contact-item a {
  color: rgba(255,255,255,0.6);
  transition: color var(--transition);
}
.footer__contact-item a:hover { color: #fff; }
.footer__bottom {
  padding-block: var(--space-6);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
}
.footer__copyright {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.4);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .stats__grid { grid-template-columns: repeat(2, 1fr); }
  .services__grid { grid-template-columns: 1fr 1fr; }
  .projects__grid { grid-template-columns: 1fr 1fr; }
  .project-card--large,
  .project-card--small,
  .project-card--sm2,
  .project-card--med { grid-column: span 1; min-height: 260px; }
  .news__grid { grid-template-columns: 1fr 1fr; }
  .footer__grid { grid-template-columns: 1fr 1fr; gap: var(--space-8); }
}

@media (max-width: 640px) {
  .hero__title { font-size: clamp(2rem, 8vw, 3rem); }
  .hero__actions { flex-direction: column; align-items: flex-start; }
  .stats__grid { grid-template-columns: repeat(2, 1fr); }
  .stat { border-right: none; border-bottom: 1px solid rgba(255,255,255,0.1); padding: var(--space-6) var(--space-4); }
  .stat:nth-child(odd) { border-right: 1px solid rgba(255,255,255,0.1); }
  .stat:last-child { border-bottom: none; }
  .services__grid { grid-template-columns: 1fr; }
  .projects__grid { grid-template-columns: 1fr; }
  .news__grid { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; }
}

/* 4-column services grid */
.services__grid--4 {
  grid-template-columns: repeat(4, 1fr);
}
.service-card--accent {
  border: 1.5px solid rgba(220,38,38,0.3);
}
.service-card--accent:hover {
  border-color: rgba(220,38,38,0.6);
}
@media (max-width: 1024px) {
  .services__grid--4 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .services__grid--4 { grid-template-columns: 1fr; }
}