/* ---------- Utilidades de layout ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}

section {
  position: relative;
  z-index: 2;
  padding: 140px 0;
}

.section-head {
  max-width: 640px;
  margin-bottom: 64px;
}

.section-head.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

/* ---------- Barra de progreso ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0%;
  background: var(--gradient);
  z-index: 100;
  transition: width 0.1s linear;
}

/* ---------- Fondo animado ---------- */
.scene-container {
  position: fixed;
  inset: 0;
  z-index: 0;
  background: var(--bg);
}

.scene-container canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.scene-vignette {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: radial-gradient(120% 90% at 50% 0%, transparent 0%, rgba(5, 7, 10, 0.35) 70%, var(--bg) 100%);
}

/* ---------- Nav ---------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 90;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 32px;
  background: rgba(5, 7, 10, 0.55);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}

.nav.is-scrolled {
  border-bottom-color: var(--border);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-links a {
  font-size: 14px;
  color: var(--muted);
  transition: color var(--dur-fast) var(--ease);
}

.nav-links a:hover {
  color: var(--ink);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-toggle {
  display: none;
}

/* ---------- Hero ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: 140px;
  padding-bottom: 80px;
}

.hero-content {
  max-width: 780px;
}

.hero-lead {
  max-width: 540px;
  margin-top: 26px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-top: 40px;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: 48px;
  margin-top: 88px;
  flex-wrap: wrap;
}

.scroll-hint {
  position: absolute;
  bottom: 40px;
  left: 32px;
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ---------- Grids ---------- */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.grid-6 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

/* ---------- Proceso ---------- */
.process-list {
  display: flex;
  flex-direction: column;
}

.process-step {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 32px;
  padding: 36px 0;
  border-top: 1px solid var(--border);
}

.process-step:last-child {
  border-bottom: 1px solid var(--border);
}

/* ---------- Split ---------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.split-reverse .split-visual {
  order: -1;
}

.code-panel {
  position: relative;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  padding: 28px;
  backdrop-filter: blur(6px);
}

.code-panel-bar {
  height: 10px;
  border-radius: 6px;
  margin-bottom: 14px;
  background: var(--gradient);
}

.diff-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-top: 32px;
}

.diff-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

/* ---------- Planes ---------- */
.plans-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}

/* ---------- FAQ ---------- */
.faq-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--border);
}

/* ---------- CTA final ---------- */
.cta-final {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.cta-final-copy {
  padding-top: 8px;
}

.cta-final-single {
  max-width: 560px;
  margin: 0 auto;
  text-align: center;
}

.cta-final-single .btn {
  margin-top: 8px;
}

/* ---------- Footer ---------- */
footer {
  position: relative;
  z-index: 2;
  padding-top: 100px;
  border-top: 1px solid var(--border);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 64px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 22px;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 28px 0;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--muted-2);
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  section {
    padding: 96px 0;
  }

  .container {
    padding: 0 24px;
  }

  .nav-links {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--dur) var(--ease);
  }

  .nav-links.is-open {
    max-height: 320px;
  }

  .nav-links a {
    width: 100%;
    padding: 16px 24px;
    border-top: 1px solid var(--border);
    font-size: 15px;
  }

  .nav-toggle {
    display: flex;
  }

  .grid-3,
  .grid-6,
  .plans-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .split,
  .cta-final {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .split-reverse .split-visual {
    order: 0;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }

  .hero-stats {
    gap: 32px;
  }
}

@media (max-width: 500px) {
  section {
    padding: 76px 0;
  }

  .container {
    padding: 0 20px;
  }

  .grid-3,
  .grid-6,
  .plans-grid {
    grid-template-columns: 1fr;
  }

  .process-step {
    grid-template-columns: 1fr;
    gap: 12px;
  }

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

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .scroll-hint {
    display: none;
  }
}