/* ============================================================
   BLUE NOVA CONSULTING — Header & Footer v1.0
   ============================================================
   Importar DESPUÉS de design-system.css
   Header: sticky, transparente → sólido al scroll
   Mega-menú: Servicios desplegable con sub-categorías
   Footer: 3 columnas + CTA banner + copyright
   ============================================================ */

/* ------------------------------------------------------------
   HEADER — Base
   ------------------------------------------------------------ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-sticky);
  padding: var(--space-lg) 0;
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  transition:
    background var(--duration-slow) var(--ease-out),
    padding var(--duration-base) var(--ease-out),
    box-shadow var(--duration-slow) var(--ease-out),
    backdrop-filter var(--duration-slow) var(--ease-out);
}

/* Header al hacer scroll */
.header.is-scrolled {
  background: rgba(6, 9, 24, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: var(--space-md) 0;
  box-shadow: 0 1px 0 var(--color-border-subtle), 0 4px 20px rgba(0,0,0,0.3);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-wide);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

/* ------------------------------------------------------------
   LOGO
   ------------------------------------------------------------ */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  flex-shrink: 0;
  z-index: calc(var(--z-sticky) + 1);
}

.logo__orb {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gradient-brand);
  box-shadow: var(--shadow-glow);
  position: relative;
  transition: transform var(--duration-base) var(--ease-out);
}
.logo:hover .logo__orb {
  transform: scale(1.08);
}
.logo__orb::after {
  content: '';
  position: absolute;
  inset: 3px;
  border-radius: 50%;
  border: 1.5px solid rgba(255,255,255,0.3);
  border-top-color: transparent;
  border-right-color: transparent;
}

.logo__text {
  font-family: var(--font-h1);
  font-weight: var(--weight-medium);
  font-size: 1.25rem;
  color: var(--color-text-primary);
  line-height: 1;
}
.logo__text span {
  display: block;
  font-family: var(--font-body);
  font-size: 0.6rem;
  font-weight: var(--weight-regular);
  letter-spacing: var(--tracking-widest);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  margin-top: 3px;
}

/* Shrink logo on scroll */
.header.is-scrolled .logo__orb {
  width: 34px;
  height: 34px;
}

/* ------------------------------------------------------------
   NAV — Desktop
   ------------------------------------------------------------ */
.nav {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-2xs);
}

.nav__item {
  position: relative;
}

.nav__link {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 0.6em 0.9em;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-secondary);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition:
    color var(--duration-fast) var(--ease-out),
    background var(--duration-fast) var(--ease-out);
  white-space: nowrap;
  letter-spacing: var(--tracking-body);
}
.nav__link:hover,
.nav__link.is-active {
  color: var(--color-text-primary);
  background: rgba(255,255,255,0.05);
}

/* Chevron for dropdown triggers */
.nav__link .nav__chevron {
  width: 14px;
  height: 14px;
  transition: transform var(--duration-fast) var(--ease-out);
  opacity: 0.5;
}
.nav__dropdown.is-open .nav__link .nav__chevron {
  transform: rotate(180deg);
}

/* CTA button in nav */
.nav__cta {
  margin-left: var(--space-sm);
}

/* ------------------------------------------------------------
   MEGA-MENÚ — Dropdown de Servicios
   ------------------------------------------------------------ */
.nav__dropdown {
  position: relative;
}

.nav__dropdown-trigger {
  cursor: pointer;
}

.nav__dropdown-panel {
  position: absolute;
  top: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  min-width: 680px;
  background: rgba(10, 14, 39, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl), 0 0 40px rgba(0,0,0,0.4);
  padding: var(--space-xl);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition:
    opacity var(--duration-base) var(--ease-out),
    transform var(--duration-base) var(--ease-out),
    visibility var(--duration-base);
  z-index: var(--z-dropdown);
}

/* Arrow/notch at top */
.nav__dropdown-panel::before {
  content: '';
  position: absolute;
  top: -6px;
  left: 50%;
  transform: translateX(-50%) rotate(45deg);
  width: 12px;
  height: 12px;
  background: rgba(10, 14, 39, 0.97);
  border-top: 1px solid var(--color-border-default);
  border-left: 1px solid var(--color-border-default);
}

.nav__dropdown.is-open .nav__dropdown-panel {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

/* Mega menu grid */
.mega-menu {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-sm);
}

.mega-menu__item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition:
    background var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out);
  border: 1px solid transparent;
}
.mega-menu__item:hover {
  background: rgba(0, 180, 216, 0.06);
  border-color: var(--color-border-card);
}

.mega-menu__icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: rgba(0, 180, 216, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent-primary);
  flex-shrink: 0;
  margin-top: 2px;
}
.mega-menu__icon svg {
  width: 20px;
  height: 20px;
}

.mega-menu__label {
  font-family: var(--font-h1);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-primary);
  margin-bottom: 2px;
}

.mega-menu__desc {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  line-height: 1.4;
}

/* Sub-items (SEO > AEO, GEO, LLM SEO) */
.mega-menu__sub {
  display: flex;
  gap: var(--space-xs);
  margin-top: 4px;
  flex-wrap: wrap;
}
.mega-menu__sub-tag {
  font-size: 0.65rem;
  color: var(--color-accent-primary);
  background: rgba(0,180,216,0.08);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-weight: var(--weight-medium);
}

/* Mega menu footer CTA */
.mega-menu__footer {
  grid-column: 1 / -1;
  margin-top: var(--space-sm);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.mega-menu__footer-text {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
}

/* ------------------------------------------------------------
   HAMBURGER — Mobile toggle
   ------------------------------------------------------------ */
.nav__toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
  z-index: calc(var(--z-sticky) + 2);
  position: relative;
}

.nav__toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-primary);
  border-radius: 2px;
  position: absolute;
  left: 10px;
  transition:
    transform var(--duration-base) var(--ease-out),
    opacity var(--duration-fast) var(--ease-out);
}
.nav__toggle-bar:nth-child(1) { top: 14px; }
.nav__toggle-bar:nth-child(2) { top: 21px; }
.nav__toggle-bar:nth-child(3) { top: 28px; }

/* Hamburger → X */
.nav.is-open .nav__toggle-bar:nth-child(1) {
  top: 21px;
  transform: rotate(45deg);
}
.nav.is-open .nav__toggle-bar:nth-child(2) {
  opacity: 0;
}
.nav.is-open .nav__toggle-bar:nth-child(3) {
  top: 21px;
  transform: rotate(-45deg);
}

/* ------------------------------------------------------------
   MOBILE NAV — Overlay
   ------------------------------------------------------------ */
@media (max-width: 1024px) {
  .nav__toggle {
    display: block;
  }

  .nav__list {
    position: fixed;
    inset: 0;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    padding: 100px var(--container-padding) var(--space-2xl);
    background: rgba(6, 9, 24, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    gap: var(--space-2xs);
    overflow-y: auto;
    transform: translateX(100%);
    opacity: 0;
    visibility: hidden;
    transition:
      transform var(--duration-slow) var(--ease-out),
      opacity var(--duration-base) var(--ease-out),
      visibility var(--duration-slow);
    z-index: var(--z-sticky);
  }

  .nav.is-open .nav__list {
    transform: translateX(0);
    opacity: 1;
    visibility: visible;
  }

  .nav__link {
    font-size: var(--text-md);
    padding: var(--space-sm) var(--space-md);
    border-bottom: 1px solid var(--color-border-subtle);
    border-radius: 0;
  }

  .nav__cta {
    margin-left: 0;
    margin-top: var(--space-lg);
  }
  .nav__cta .btn {
    width: 100%;
    justify-content: center;
  }

  /* Mobile dropdown */
  .nav__dropdown-panel {
    position: static;
    transform: none;
    min-width: 0;
    width: 100%;
    background: rgba(15, 20, 53, 0.6);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-md);
    box-shadow: none;
    backdrop-filter: none;
    padding: 0;
    margin-top: var(--space-xs);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transition:
      max-height var(--duration-slow) var(--ease-out),
      opacity var(--duration-base) var(--ease-out),
      padding var(--duration-base) var(--ease-out);
  }
  .nav__dropdown-panel::before { display: none; }

  .nav__dropdown.is-open .nav__dropdown-panel {
    max-height: 70vh;
    overflow-y: auto;
    opacity: 1;
    visibility: visible;
    padding: var(--space-sm);
    -webkit-overflow-scrolling: touch;
  }

  .mega-menu {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xs);
  }
  .mega-menu__item {
    padding: var(--space-xs) var(--space-sm);
  }
  .mega-menu__icon {
    width: 32px;
    height: 32px;
  }
  .mega-menu__icon svg {
    width: 16px;
    height: 16px;
  }
  .mega-menu__desc {
    display: none;
  }
  .mega-menu__sub {
    margin-top: 3px;
  }
  .mega-menu__sub-tag {
    font-size: 0.6rem;
    padding: 1px 5px;
  }
  .mega-menu__footer {
    flex-direction: column;
    gap: var(--space-sm);
    align-items: stretch;
    text-align: center;
  }
}

/* Phone — single column mega menu */
@media (max-width: 640px) {
  .mega-menu {
    grid-template-columns: 1fr;
  }
  .mega-menu__item {
    padding: var(--space-sm);
    border-bottom: 1px solid var(--color-border-subtle);
  }
  .mega-menu__item:last-of-type {
    border-bottom: none;
  }
  .mega-menu__icon {
    width: 36px;
    height: 36px;
  }
  .mega-menu__icon svg {
    width: 18px;
    height: 18px;
  }
  .mega-menu__label {
    font-size: var(--text-base);
  }
}

/* ------------------------------------------------------------
   SPACER — Push content below fixed header
   ------------------------------------------------------------ */
.header-spacer {
  height: 88px;
}
@media (max-width: 1024px) {
  .header-spacer { height: 76px; }
}

/* ------------------------------------------------------------
   FOOTER — Complete
   ------------------------------------------------------------ */
.footer {
  background: var(--color-bg-deep);
  position: relative;
  overflow: hidden;
}

/* CTA section above footer */
.footer-cta {
  padding: var(--space-2xl) 0;
}

.footer-cta__banner {
  border-radius: var(--radius-xl);
  padding: var(--space-4xl) var(--space-2xl);
  background: var(--gradient-cta-banner);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2xl);
}
@media (max-width: 768px) {
  .footer-cta__banner {
    flex-direction: column;
    text-align: center;
    padding: var(--space-3xl) var(--space-lg);
  }
}

.footer-cta__title {
  font-family: var(--font-h2);
  font-size: var(--text-h2);
  font-weight: var(--weight-bold);
  font-style: oblique;
  color: var(--color-text-on-accent);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-h2);
}
.footer-cta__title span {
  display: block;
  color: #0369a1; /* Darker cyan on light bg */
}

/* Footer main content */
.footer__main {
  padding: var(--space-3xl) 0 var(--space-2xl);
  border-top: 1px solid var(--color-border-subtle);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: var(--space-2xl);
}
@media (max-width: 768px) {
  .footer__grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
}

/* Footer column headings — pill style */
.footer__heading {
  display: inline-flex;
  padding: 0.35em 1em;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--color-text-primary);
  background: transparent;
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-lg);
}

.footer__link {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  color: var(--color-text-secondary);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  margin-bottom: var(--space-sm);
  transition: color var(--duration-fast) var(--ease-out);
  text-decoration: none;
  letter-spacing: var(--tracking-body);
}
.footer__link:hover {
  color: var(--color-accent-primary);
}

.footer__link-icon {
  width: 18px;
  height: 18px;
  color: var(--color-accent-primary);
  flex-shrink: 0;
}

/* Social links */
.footer__social {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
}

.footer__social-link {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--color-border-default);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  transition: all var(--duration-fast) var(--ease-out);
  text-decoration: none;
}
.footer__social-link:hover {
  border-color: var(--color-accent-primary);
  color: var(--color-accent-primary);
  background: rgba(0,180,216,0.08);
}
.footer__social-link svg {
  width: 18px;
  height: 18px;
}

/* Bottom bar */
.footer__bottom {
  border-top: 1px solid var(--color-border-subtle);
  padding: var(--space-lg) 0;
  text-align: center;
}

.footer__copyright {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  font-style: italic;
  letter-spacing: var(--tracking-body);
}

/* Back to top button */
.back-to-top {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border-default);
  color: var(--color-accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition:
    opacity var(--duration-base) var(--ease-out),
    visibility var(--duration-base),
    transform var(--duration-base) var(--ease-out),
    background var(--duration-fast) var(--ease-out);
  z-index: var(--z-base);
  box-shadow: var(--shadow-md);
}
.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-to-top:hover {
  background: var(--color-bg-surface);
  border-color: var(--color-accent-primary);
}