/* Header / navegación — barra blanca translúcida fija, estilo apple.com */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  color: var(--color-ink);
  border-bottom: 1px solid transparent;
  transition: background var(--duration-fast) var(--ease), border-color var(--duration-fast) var(--ease);
}

.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.92);
  border-bottom-color: var(--color-border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding-block: var(--space-2);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  flex-shrink: 0;
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: var(--tracking-tight);
  font-size: var(--text-lg);
  color: var(--color-ink);
}

.brand__icon {
  width: 32px;
  height: 32px;
}

.nav-menu {
  display: none;
}

.nav-menu.is-open {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-white);
  color: var(--color-ink);
  box-shadow: var(--shadow-float);
  padding: var(--space-2) var(--space-3) var(--space-3);
  gap: var(--space-1);
}

.nav-menu a {
  display: block;
  padding: var(--space-2) var(--space-1);
  text-decoration: none;
  font-weight: 600;
  font-size: var(--text-sm);
  min-height: 44px;
}

.nav-cta {
  display: none;
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-ink);
}

.nav-toggle svg {
  width: 20px;
  height: 20px;
}

@media (min-width: 1280px) {
  .nav-toggle {
    display: none;
  }

  .nav-menu {
    display: flex !important;
    position: static;
    flex-direction: row;
    align-items: center;
    background: none;
    color: inherit;
    box-shadow: none;
    padding: 0;
    gap: 18px;
  }

  .nav-menu a {
    padding: var(--space-1) 2px;
    min-height: auto;
    position: relative;
    font-size: var(--text-xs);
    white-space: nowrap;
  }

  .nav-menu a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: width var(--duration-fast) var(--ease);
  }

  .nav-menu a:hover::after,
  .nav-menu a:focus-visible::after {
    width: 100%;
  }

  .nav-cta {
    display: inline-flex;
    flex-shrink: 0;
    min-height: 40px;
    padding: 10px 20px;
    font-size: var(--text-xs);
    white-space: nowrap;
  }
}

/* Secciones — bloques rectangulares simples, blanco y gris claro alternados (sin cortes diagonales ni fondos oscuros) */

.section {
  position: relative;
  padding-block: var(--space-12);
  background: var(--color-white);
}

.section--tint {
  background: var(--color-bg-tint);
}

/* Fondo premium en degradé — reservado para la sección de la calculadora, como momento destacado */
.section--teal {
  background: radial-gradient(circle at 12% 12%, rgba(255, 255, 255, 0.08), transparent 45%),
    linear-gradient(135deg, #06282a 0%, #0a4647 55%, #135953 100%);
  color: var(--color-white);
}

.section--teal h1,
.section--teal h2,
.section--teal h3 {
  color: var(--color-white);
}

.section--teal p {
  color: rgba(255, 255, 255, 0.75);
}

.section--teal .section-eyebrow {
  color: rgba(255, 255, 255, 0.9);
}

.section--teal .section-eyebrow::before {
  background: rgba(255, 255, 255, 0.9);
}

.section-header {
  max-width: 640px;
  margin-bottom: var(--space-8);
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-2);
}

.section-eyebrow::before {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--color-accent);
}

/* Composición asimétrica reusable: dos columnas desbalanceadas */

.split {
  display: grid;
  gap: var(--space-6);
}

@media (min-width: 1024px) {
  .split {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-10);
    align-items: center;
  }

  .split--wide-left {
    grid-template-columns: 1.2fr 0.8fr;
  }

  .split--wide-right {
    grid-template-columns: 0.8fr 1.2fr;
  }

  .split--sticky > *:first-child {
    position: sticky;
    top: 120px;
    align-self: start;
  }

  .split--trio {
    grid-template-columns: 110px 1fr 320px;
    gap: var(--space-6);
  }
}

/* Footer — gris claro con texto oscuro, como el pie de apple.com */

.site-footer {
  background: var(--color-bg-tint);
  color: var(--color-ink-soft);
  padding-block: var(--space-10) var(--space-6);
}

.site-footer p {
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
}

.site-footer a {
  color: var(--color-ink);
  text-decoration: none;
}

.footer-grid {
  display: grid;
  gap: var(--space-6);
  padding-bottom: var(--space-8);
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 1.6fr 1fr 1fr 1fr;
    gap: var(--space-4);
  }
}

.footer-col--brand {
  max-width: 34ch;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-lg);
  color: var(--color-ink);
  margin-bottom: var(--space-2);
}

.footer-whatsapp {
  display: inline-flex;
  gap: 8px;
  margin-top: var(--space-2);
  min-height: 40px;
  padding: 8px 16px;
  font-size: var(--text-xs);
}

.footer-col__title {
  font-weight: 700;
  color: var(--color-ink);
  font-size: var(--text-sm);
  margin-bottom: var(--space-2);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.footer-links a {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: var(--text-sm);
}

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

.footer-links svg {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.footer-bottom {
  padding-top: var(--space-3);
  border-top: var(--border-hairline);
  font-size: var(--text-xs);
}