/* =================================================================
   Baleya Welding — main stylesheet
   Mobile-first, no build step, CSS variables for theming.
   ================================================================= */

:root {
  --black:     #1a1a1a;
  --charcoal:  #2a2a2a;
  --charcoal-2:#232323;
  --orange:    #FF6B00;
  --orange-2:  #ff8533;
  --silver:    #C0C0C0;
  --white:     #F5F5F5;
  --muted:     #9a9a9a;
  --border:    #333;

  --font-heading: 'Oswald', 'Arial Narrow', sans-serif;
  --font-body:    'Open Sans', 'Helvetica Neue', Arial, sans-serif;

  --shadow-sm:  0 2px 6px rgba(0,0,0,0.35);
  --shadow-md:  0 8px 24px rgba(0,0,0,0.45);
  --shadow-lg:  0 14px 40px rgba(0,0,0,0.55);
  --radius:     8px;
  --max-width:  1200px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--black);
  color: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--orange); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--orange-2); }

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  letter-spacing: 0.5px;
  line-height: 1.2;
  color: var(--white);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: 0.85rem 1.75rem;
  font-family: var(--font-heading);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.2s;
  font-size: 0.95rem;
}
.btn-primary {
  background: var(--orange);
  color: var(--black);
}
.btn-primary:hover {
  background: var(--orange-2);
  color: var(--black);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.btn-ghost {
  background: transparent;
  color: var(--white);
  border-color: var(--white);
}
.btn-ghost:hover {
  background: var(--white);
  color: var(--black);
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(26, 26, 26, 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow 0.2s;
}
.site-header.scrolled { box-shadow: var(--shadow-sm); }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 1.25rem;
  min-height: 110px;
}
.logo-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--white);
  transition: filter 0.2s ease;
}
.logo-img {
  height: 92px;
  width: auto;
  object-fit: contain;
  display: block;
  transition: filter 0.25s ease, transform 0.2s ease;
}
.footer-logo {
  height: 70px;
}
.logo-link:hover .logo-img,
.logo-link:active .logo-img,
.logo-link:focus-visible .logo-img {
  /* Tinta el logo blanco a naranja molten */
  filter: brightness(0) saturate(100%) invert(46%) sepia(95%) saturate(2300%) hue-rotate(8deg) brightness(102%) contrast(105%);
  transform: scale(1.02);
}
@media (min-width: 768px) {
  .logo-img { height: 110px; }
  .footer-logo { height: 80px; }
}

.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: stretch;
  width: 38px;
  height: 30px;
  padding: 4px 0;
  margin: 0;
  background: transparent;
  border: 0;
  border-radius: 4px;
  cursor: pointer;
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  flex-shrink: 0;
}
.nav-toggle span {
  display: block;
  width: 100%;
  height: 3px;
  background-color: #F5F5F5;
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
  pointer-events: none;
}
.nav-toggle.active span:nth-child(1) { transform: translateY(9px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-9px) rotate(-45deg); }

.site-nav {
  display: none;
  flex-direction: column;
  gap: 0.25rem;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--charcoal);
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
}
.site-nav.open { display: flex; }
.site-nav a {
  padding: 0.6rem 0;
  color: var(--white);
  font-family: var(--font-heading);
  font-size: 1.05rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  border-bottom: 1px solid var(--border);
}
.site-nav a:last-child { border-bottom: none; }
.site-nav a.active { color: var(--orange); }
.site-nav .nav-cta {
  display: inline-block;
  margin-top: 0.5rem;
  background: var(--orange);
  color: var(--black);
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius);
  text-align: center;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 88vh;
  display: flex;
  align-items: flex-end;
  background: var(--black);
  color: var(--white);
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  /* Foto landscape — en mobile enfocar la escalera (centro-derecha). En desktop la foto completa. */
  object-position: 60% center;
  z-index: 0;
}
@media (min-width: 768px) {
  .hero {
    align-items: center;
    min-height: 80vh;
  }
  .hero-bg { object-position: center center; }
}
.hero-overlay {
  position: absolute; inset: 0;
  /* Mobile: gradient vertical — claro arriba (foto visible), oscuro abajo (texto legible) */
  background: linear-gradient(180deg, rgba(0,0,0,0.2) 0%, rgba(0,0,0,0.3) 30%, rgba(0,0,0,0.7) 70%, rgba(0,0,0,0.92) 100%);
  z-index: 1;
}
@media (min-width: 768px) {
  .hero-overlay {
    /* Desktop: gradient horizontal — oscuro izq. (texto legible), claro der. (escalera visible) */
    background: linear-gradient(90deg, rgba(0,0,0,0.82) 0%, rgba(0,0,0,0.55) 40%, rgba(0,0,0,0.2) 70%, rgba(0,0,0,0.05) 100%);
  }
}
.hero-content {
  position: relative;
  z-index: 2;
  padding: 5rem 1.25rem;
  max-width: 950px;
}
.hero-kicker {
  color: var(--orange);
  font-family: var(--font-heading);
  text-transform: uppercase;
  letter-spacing: 3px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1rem;
}
.hero h1 {
  font-size: clamp(2.25rem, 6vw, 4.25rem);
  margin-bottom: 1.25rem;
  text-transform: uppercase;
  text-shadow: 0 2px 20px rgba(0,0,0,0.5);
}
.hero h1 .accent { color: var(--orange); }
.hero-sub {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--silver);
  margin-bottom: 2rem;
  max-width: 700px;
}
.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2.5rem;
}
.hero-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  color: var(--silver);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.5px;
}
.hero-trust span { white-space: nowrap; }

/* ===== Page Hero (sub pages) ===== */
.page-hero {
  background: linear-gradient(135deg, var(--charcoal), var(--black));
  padding: 5rem 0 3rem;
  text-align: center;
  border-bottom: 3px solid var(--orange);
}
.page-hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}
.page-hero p { color: var(--silver); }

/* ===== Sections ===== */
.section { padding: 4rem 0; }
.section-dark { background: var(--charcoal); }
.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin-bottom: 0.5rem;
  text-transform: uppercase;
}
.section-sub {
  color: var(--muted);
  margin-bottom: 2.5rem;
  font-size: 1.05rem;
}
.section-cta {
  text-align: center;
  margin-top: 2.5rem;
}

/* ===== Card grids ===== */
.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}
.card {
  display: block;
  background: var(--charcoal);
  padding: 2rem 1.5rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  color: var(--white);
  transition: all 0.3s;
  text-align: center;
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--orange);
  box-shadow: var(--shadow-md);
  color: var(--white);
}
.card-icon {
  font-size: 2.25rem;
  margin-bottom: 1rem;
  color: var(--orange);
  line-height: 1;
}
.card h3 {
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
}
.card p { color: var(--silver); font-size: 0.95rem; }

/* ===== Project grid (Featured Projects) ===== */
.project-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}
.project-card {
  background: var(--charcoal-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all 0.3s;
}
.project-card:hover {
  transform: translateY(-4px);
  border-color: var(--orange);
  box-shadow: var(--shadow-lg);
}
.project-img {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/10;
  background: var(--black);
}
.project-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.project-card:hover .project-img img { transform: scale(1.05); }
.project-body { padding: 1.5rem; }
.project-tag {
  display: inline-block;
  background: var(--orange);
  color: var(--black);
  padding: 0.25rem 0.75rem;
  border-radius: 4px;
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 0.75rem;
}
.project-card h3 {
  font-size: 1.35rem;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
}
.project-card p { color: var(--silver); font-size: 0.95rem; }

/* ===== Two-column layout ===== */
.two-col {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: center;
}
.two-col p { margin-bottom: 1rem; color: var(--silver); }
.about-img img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}

/* ===== About narrative (about page) ===== */
.about-narrative {
  max-width: 850px;
  margin: 0 auto;
}
.about-narrative p {
  color: var(--silver);
  font-size: 1.05rem;
  margin-bottom: 1.25rem;
  line-height: 1.75;
}
.about-narrative strong { color: var(--white); }

/* ===== Project list (about page) ===== */
.project-list {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
  max-width: 850px;
}
.project-list li {
  padding: 1rem 1.25rem;
  background: var(--charcoal);
  border-left: 4px solid var(--orange);
  border-radius: var(--radius);
  color: var(--silver);
}
.project-list strong { color: var(--white); }

/* ===== Service list ===== */
.service-list { display: flex; flex-direction: column; gap: 2.5rem; }
.service-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  padding: 1.5rem;
  background: var(--charcoal);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: border-color 0.2s;
}
.service-row:hover { border-color: var(--orange); }
.service-row.featured-service {
  background: linear-gradient(135deg, rgba(255,107,0,0.08), rgba(255,107,0,0.02));
  border: 2px solid var(--orange);
  position: relative;
}
.service-row.featured-service::before {
  content: "INCLUDED";
  position: absolute;
  top: -12px;
  right: 1.25rem;
  background: var(--orange);
  color: var(--black);
  padding: 0.25rem 0.85rem;
  border-radius: 4px;
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 1.5px;
}
.service-row.featured-service h2 { color: var(--orange); }
.service-row h2 {
  font-size: 1.75rem;
  color: var(--orange);
  margin-bottom: 0.75rem;
  text-transform: uppercase;
}
.service-row p { color: var(--silver); margin-bottom: 1rem; }
.service-row ul { padding-left: 1.25rem; color: var(--silver); }
.service-row li { margin-bottom: 0.35rem; }
.service-icon {
  font-size: 2.5rem;
  color: var(--orange);
  line-height: 1;
}

/* ===== Filter bar ===== */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin-bottom: 2.5rem;
}
.filter-btn {
  padding: 0.6rem 1.25rem;
  background: transparent;
  color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  font-family: var(--font-heading);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  transition: all 0.2s;
}
.filter-btn:hover { border-color: var(--orange); color: var(--orange); }
.filter-btn.active {
  background: var(--orange);
  color: var(--black);
  border-color: var(--orange);
}

/* ===== Gallery ===== */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}
.gallery-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  cursor: pointer;
  background: var(--charcoal);
  transition: transform 0.3s;
  border: 1px solid var(--border);
}
.gallery-item:hover {
  border-color: var(--orange);
  box-shadow: var(--shadow-md);
}
.gallery-item.hide { display: none; }
.gallery-item img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  transition: transform 0.4s;
}
.gallery-item:hover img { transform: scale(1.06); }
.gallery-item figcaption {
  padding: 0.75rem 1rem;
  color: var(--white);
  font-size: 0.9rem;
  background: var(--charcoal);
  border-top: 1px solid var(--border);
}

/* ===== Lightbox ===== */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.95);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  padding: 1rem;
}
.lightbox.open { display: flex; }
.lightbox img {
  max-width: 95%;
  max-height: 80vh;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}
.lightbox-caption { color: var(--white); margin-top: 1rem; text-align: center; }
.lightbox-close {
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  background: transparent;
  color: var(--white);
  border: none;
  font-size: 2.5rem;
  cursor: pointer;
  line-height: 1;
}

/* ===== Contact form ===== */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 1.5rem;
}
.contact-form label {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  color: var(--silver);
  font-size: 0.9rem;
  font-weight: 600;
}
.contact-form input,
.contact-form textarea,
.contact-form select {
  background: var(--black);
  color: var(--white);
  border: 1px solid var(--border);
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: border 0.2s;
}
.contact-form input:focus,
.contact-form textarea:focus,
.contact-form select:focus {
  outline: none;
  border-color: var(--orange);
}
.contact-info { color: var(--silver); }
.contact-info h3 {
  font-size: 1.3rem;
  margin-bottom: 1rem;
  text-transform: uppercase;
  color: var(--orange);
}
.contact-info p { margin-bottom: 1rem; }
.contact-info strong { color: var(--white); }
.map-embed {
  margin-top: 1rem;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
}

/* ===== Social links ===== */
.social-links {
  display: flex;
  gap: 0.6rem;
  margin: 1rem 0 1.5rem;
  flex-wrap: wrap;
}
.social-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 0.95rem;
  background: var(--black);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--silver);
  font-family: var(--font-heading);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  transition: all 0.2s;
}
.social-links a svg {
  display: block;
  flex-shrink: 0;
}
.social-links a:hover {
  border-color: var(--orange);
  color: var(--orange);
  transform: translateY(-1px);
}

/* ===== CTA Banner ===== */
.cta-banner { text-align: center; }
.cta-banner h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}
.cta-banner p {
  color: var(--silver);
  margin-bottom: 1.5rem;
}
.cta-banner .hero-ctas { justify-content: center; }

/* ===== Footer ===== */
.site-footer {
  background: var(--black);
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  margin-top: 2rem;
}
.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  text-align: center;
}
.footer-inner p { color: var(--muted); margin-top: 0.5rem; font-size: 0.9rem; }
.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  justify-content: center;
}
.footer-nav a {
  color: var(--silver);
  font-family: var(--font-heading);
  text-transform: uppercase;
  font-size: 0.9rem;
  letter-spacing: 1px;
}
.footer-nav a:hover { color: var(--orange); }

/* ===== WhatsApp float ===== */
.whatsapp-float {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 58px;
  height: 58px;
  background: #25D366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 16px rgba(0,0,0,0.4);
  z-index: 1000;
  transition: transform 0.2s;
}
.whatsapp-float:hover { transform: scale(1.08); }

/* ===== Scroll animations ===== */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}
/* Override defensivo: las gallery items JAMAS deben depender de fade-in.
   Protege contra JS cacheado o edge cases del IntersectionObserver con lazy images. */
.gallery-item,
.gallery-item.fade-in {
  opacity: 1 !important;
  transform: none !important;
}

/* =================================================================
   Desktop breakpoint
   ================================================================= */
@media (min-width: 768px) {
  .nav-toggle { display: none; }
  .site-nav {
    display: flex;
    flex-direction: row;
    position: static;
    background: transparent;
    padding: 0;
    gap: 1.5rem;
    border: none;
  }
  .site-nav a {
    padding: 0;
    border-bottom: 2px solid transparent;
    font-size: 0.95rem;
  }
  .site-nav a:hover,
  .site-nav a.active { border-bottom-color: var(--orange); color: var(--orange); }
  .site-nav .nav-cta {
    margin-top: 0;
    padding: 0.5rem 1.25rem;
    border-bottom: none;
  }
  .site-nav .nav-cta:hover { color: var(--black); }

  .card-grid { grid-template-columns: repeat(4, 1fr); }
  .card-grid.three-up { grid-template-columns: repeat(3, 1fr); }
  .project-grid { grid-template-columns: repeat(2, 1fr); }
  .two-col { grid-template-columns: 1fr 1fr; gap: 3rem; }
  .service-row { grid-template-columns: auto 1fr; gap: 2rem; padding: 2rem; }
  .footer-inner { flex-direction: row; justify-content: space-between; text-align: left; }
}

@media (min-width: 1024px) {
  .section { padding: 6rem 0; }
  .project-grid { grid-template-columns: repeat(3, 1fr); }
}