/* ═══════════════════════════════════════════════════════════
   LAYOUT — nav, contenedores, grids, secciones, footer
   alfyma/css/layout.css
   ═══════════════════════════════════════════════════════════ */

/* ─── Scroll Progress Bar ─── */

#scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--accent);
  z-index: var(--z-progress);
  transition: width 0.1s linear;
  box-shadow: 0 0 8px rgba(213, 106, 43, 0.5);
}

/* ─── Navigation ─── */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
}

.nav {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 0 clamp(1.25rem, 4vw, 2.5rem);
  height: 68px;
  background: rgba(10, 10, 12, 0.92);
  backdrop-filter: blur(14px) saturate(1.3);
  -webkit-backdrop-filter: blur(14px) saturate(1.3);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), box-shadow var(--transition);
}

.nav.scrolled {
  background: rgba(10, 10, 12, 0.98);
  box-shadow: 0 1px 0 var(--border), 0 4px 24px rgba(0, 0, 0, 0.6);
}

.nav__brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  flex-shrink: 0;
}

.nav__logo-mark {
  font-size: 1.25rem;
  color: var(--accent);
  line-height: 1;
}

.nav__logo-text {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--text-primary);
  text-transform: uppercase;
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  margin-left: auto;
  flex-wrap: nowrap;
}

.nav__link {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-secondary);
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius);
  transition: color var(--transition), background var(--transition);
  white-space: nowrap;
}

.nav__link:hover {
  color: var(--text-primary);
  background: rgba(213, 106, 43, 0.08);
}

.nav__cta {
  flex-shrink: 0;
  margin-left: 0.5rem;
}

.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  margin-left: auto;
  padding: 0.5rem;
  cursor: pointer;
}

.nav__toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--text-primary);
  transition: transform var(--transition), opacity var(--transition);
  transform-origin: center;
}

.nav__toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.nav__toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav__toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* ─── Container ─── */

.container {
  width: var(--container);
  margin-inline: auto;
}

/* ─── Section base ─── */

.section {
  position: relative;
  z-index: var(--z-content);
  padding-block: clamp(4rem, 8vw, 7rem);
  background: var(--bg-deep);
}

.section--dark {
  background: var(--bg-surface);
}

.section--cta {
  background: var(--bg-surface);
}

.section__header {
  text-align: center;
  max-width: 720px;
  margin-inline: auto;
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.section__title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.5vw, 2.6rem);
  font-weight: 700;
  line-height: 1.22;
  color: var(--text-primary);
  margin-top: 0.75rem;
  margin-bottom: 1.25rem;
}

.section__lead {
  font-size: clamp(0.95rem, 1.5vw, 1.1rem);
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 640px;
  margin-inline: auto;
}

/* ─── Kicker ─── */

.kicker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

/* ─── Hero ─── */

.section--hero {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: calc(68px + clamp(3rem, 6vw, 5rem));
  padding-bottom: clamp(3rem, 6vw, 5rem);
  background-color: var(--bg-deep);
  background-image:
    linear-gradient(
      105deg,
      rgba(10, 10, 12, 0.82) 0%,
      rgba(10, 10, 12, 0.52) 50%,
      rgba(10, 10, 12, 0.72) 100%
    ),
    url('../assets/planta-convoyado.jpg');
  background-size: cover;
  background-position: center 55%;
  background-repeat: no-repeat;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: clamp(2.5rem, 5vw, 5rem);
  align-items: start;
}

.hero__content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.5vw, 3.4rem);
  font-weight: 700;
  line-height: 1.18;
  color: var(--text-primary);
}

.hero__subtitle {
  font-size: clamp(1rem, 1.6vw, 1.15rem);
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 560px;
}

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-brass);
}

.hero__meta li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.hero__stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--border);
  margin-top: 0.5rem;
}

/* ─── Scroll hint ─── */

.scroll-hint {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  margin-top: 3rem;
  padding-bottom: 1rem;
}

.scroll-hint__line {
  display: block;
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scroll-pulse 2s ease-in-out infinite;
}

.scroll-hint__label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

@keyframes scroll-pulse {
  0%, 100% { opacity: 0.4; transform: scaleY(1); }
  50%       { opacity: 1;   transform: scaleY(1.15); }
}

/* ─── Photo Strip (full-width divider) ─── */

.photo-strip {
  position: relative;
  width: 100%;
  height: clamp(200px, 28vw, 360px);
  overflow: hidden;
  line-height: 0;
}

.photo-strip img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 40%;
  filter: brightness(0.75) contrast(1.08) saturate(0.85);
  display: block;
}

.photo-strip::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(10, 10, 12, 0.35) 0%,
    transparent 30%,
    transparent 70%,
    rgba(10, 10, 12, 0.4) 100%
  );
  pointer-events: none;
}

/* ─── Section Photo (within split sections) ─── */

.section-photo {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border);
  margin: 0;
}

.section-photo img {
  width: 100%;
  height: 100%;
  min-height: 300px;
  object-fit: cover;
  display: block;
  filter: brightness(0.82) contrast(1.05) saturate(0.9);
  transition: filter var(--transition);
}

.section-photo:hover img {
  filter: brightness(0.9) contrast(1.05) saturate(0.95);
}

.section-photo figcaption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 0.75rem 1rem;
  background: rgba(10, 10, 12, 0.82);
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-brass);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* ─── Process Photo (wide photo after steps) ─── */

.process-photo {
  margin-top: 3rem;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border);
  position: relative;
}

.process-photo img {
  width: 100%;
  height: clamp(220px, 30vw, 380px);
  object-fit: cover;
  object-position: center 35%;
  display: block;
  filter: brightness(0.80) contrast(1.06) saturate(0.85);
}

.process-photo figcaption {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.9rem 1.25rem;
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-brass);
}

/* ─── Solución split ─── */

.solucion__grid {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: clamp(3rem, 6vw, 6rem);
  align-items: center;
}

.solucion__visual {
  display: flex;
  justify-content: center;
  align-items: stretch;
}

.solucion__visual .section-photo {
  width: 100%;
  min-height: 420px;
}

.solucion__visual .section-photo img {
  min-height: 420px;
}

/* ─── Process Steps ─── */

.process-steps {
  display: flex;
  align-items: flex-start;
  gap: 0;
}

.process-step {
  flex: 1;
  padding: 2rem 1.5rem;
  text-align: center;
  position: relative;
}

.process-step__connector {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-steel);
  font-size: 0.5rem;
  letter-spacing: 0.3em;
  margin-top: 4rem;
  flex-shrink: 0;
  width: 40px;
}

/* ─── CTA Final ─── */

.cta-final__wrap {
  text-align: center;
}

.cta-final__title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.5vw, 2.8rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
  margin-top: 0.75rem;
  margin-bottom: 1.25rem;
}

/* ─── Footer ─── */

.site-footer {
  position: relative;
  z-index: var(--z-content);
  background: #080809;
  border-top: 1px solid var(--border);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 3rem;
  padding-block: clamp(3rem, 6vw, 5rem);
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  border-top: 1px solid var(--border-steel);
  padding: 1.25rem calc((100% - var(--container)) / 2);
  padding-inline: calc((100% - var(--container)) / 2);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
}

.footer__bottom nav {
  display: flex;
  gap: 1.5rem;
}

.footer__bottom a {
  color: var(--text-secondary);
  transition: color var(--transition);
}

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

/* ─── Tabs wrapper ─── */

.tabs-wrap {
  margin-top: 0;
}

/* ─── Cards Grid ─── */

.cards-grid {
  display: grid;
  gap: 1.5rem;
}

.cards-grid--3 {
  grid-template-columns: repeat(3, 1fr);
}

/* ─── Product Cards ─── */

.product-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  max-width: 900px;
  margin-inline: auto;
}

/* ─── Testimonials ─── */

.testimonials {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

/* ─── Lead Magnet ─── */

.lead-magnet {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: clamp(2.5rem, 5vw, 5rem);
  align-items: center;
  background: rgba(22, 22, 24, 0.8);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: clamp(2rem, 4vw, 3.5rem);
}

/* ─── FAQ ─── */

.faq-list {
  max-width: 800px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: 0;
}

/* ─── Dimension CTA ─── */

.dim-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-top: 2rem;
  padding: 1.25rem 1.75rem;
  background: rgba(184, 149, 106, 0.07);
  border: 1px solid rgba(184, 149, 106, 0.28);
  border-radius: var(--radius);
}

.dim-cta__content {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  flex: 1;
  min-width: 240px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.dim-cta__icon {
  color: var(--accent-brass);
  flex-shrink: 0;
  margin-top: 0.15em;
}

/* ═══════════════════════════════════════════════════════════
   RESPONSIVE — 900px
   ═══════════════════════════════════════════════════════════ */

@media (max-width: 900px) {
  .nav__menu {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(10, 10, 12, 0.98);
    border-bottom: 1px solid var(--border);
    padding: 1rem 1.5rem 1.5rem;
    margin: 0;
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition), opacity var(--transition);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
  }

  .nav__menu.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav__link {
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--border-steel);
    border-radius: 0;
  }

  .nav .nav__cta {
    display: none;
  }

  .nav__toggle {
    display: flex;
  }

  .hero__grid {
    grid-template-columns: 1fr;
  }

  .hero__stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .solucion__grid {
    grid-template-columns: 1fr;
  }

  .solucion__visual {
    order: -1;
  }

  .solucion__visual .section-photo,
  .solucion__visual .section-photo img {
    min-height: 260px;
  }

  .cards-grid--3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .process-steps {
    flex-direction: column;
    gap: 0;
  }

  .process-step__connector {
    transform: rotate(90deg);
    margin: 0 auto;
    width: 40px;
  }

  .product-cards {
    grid-template-columns: 1fr;
    max-width: 520px;
  }

  .testimonials {
    grid-template-columns: 1fr;
  }

  .lead-magnet {
    grid-template-columns: 1fr;
  }

  .lead-magnet__visual {
    max-width: 280px;
    margin-inline: auto;
  }

  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }

  .footer__brand {
    grid-column: 1 / -1;
  }

  .tabs {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    gap: 0;
  }

  .tabs::-webkit-scrollbar {
    display: none;
  }

  .tabs button {
    flex-shrink: 0;
  }
}

/* ═══════════════════════════════════════════════════════════
   RESPONSIVE — 500px
   ═══════════════════════════════════════════════════════════ */

@media (max-width: 500px) {
  .cards-grid--3 {
    grid-template-columns: 1fr;
  }

  .hero__stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer__grid {
    grid-template-columns: 1fr;
  }

  .dim-cta {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer__bottom {
    flex-direction: column;
    text-align: center;
    gap: 0.75rem;
  }
}