/* ==========================================================================
   VortexNeural — Layout
   Header/nav, menú móvil, footer, contenedores y patrones de grid genéricos.
   Mobile-first: estilos base = móvil, se amplía con min-width.
   ========================================================================== */

/* ---------------------------------------------------------------------- */
/* Header                                                                  */
/* ---------------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: rgba(10, 13, 20, 0.72);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  width: 100%;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.0625rem;
  color: var(--text-primary);
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.brand__mark-wrap {
  position: relative;
  display: inline-block;
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  perspective: 240px;
}

.brand__mark {
  width: 32px;
  height: 32px;
  display: block;
  transform-style: preserve-3d;
  backface-visibility: hidden;
}

/* Giro 3D (eje vertical, tipo moneda) + destello metálico al pasar el
   cursor o el foco de teclado por el logo (cabecera y pie). El destello se
   recorta a la silueta exacta del propio logo (mask-image) en vez de ser
   un rectángulo superpuesto, para que parezca que brilla el metal mismo. */
.logo-shine {
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, transparent 40%, rgba(255, 255, 255, 0.95) 50%, rgba(160, 195, 255, 0.7) 56%, transparent 68%);
  background-size: 300% 300%;
  background-position: -100% -100%;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  -webkit-mask-position: center;
  mask-position: center;
  -webkit-mask-size: contain;
  mask-size: contain;
  mix-blend-mode: screen;
  opacity: 0;
  pointer-events: none;
}

.brand__mark-wrap .logo-shine {
  -webkit-mask-image: url(../imgs/logo/logo-symbol-icon.webp);
  mask-image: url(../imgs/logo/logo-symbol-icon.webp);
}

.brand:hover .brand__mark,
.brand:focus-visible .brand__mark {
  animation: logo-spin-3d 1800ms ease-in-out;
}

.brand:hover .logo-shine,
.brand:focus-visible .logo-shine {
  animation: logo-shine-flash 1800ms ease-in-out;
}

@keyframes logo-spin-3d {
  to { transform: rotateY(360deg); }
}

@keyframes logo-shine-flash {
  0%, 30% { opacity: 0; background-position: -100% -100%; }
  50% { opacity: 1; background-position: 0% 0%; }
  70%, 100% { opacity: 0; background-position: 100% 100%; }
}

.main-nav {
  display: none;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-list a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding-block: var(--space-2);
  border-bottom: 1px solid transparent;
  transition: color var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out);
}

.nav-list a:hover {
  color: var(--text-primary);
}

.nav-list a.is-active {
  color: var(--text-primary);
  border-color: var(--accent-blue);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.header-actions .btn {
  display: none;
}

.nav-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  color: var(--text-primary);
}

.nav-toggle:hover {
  background: var(--surface-2);
}

.nav-toggle__icon,
.nav-toggle__icon::before,
.nav-toggle__icon::after {
  width: 20px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform var(--dur-base) var(--ease-out), opacity var(--dur-base) var(--ease-out);
}

.nav-toggle__icon {
  position: relative;
}

.nav-toggle__icon::before,
.nav-toggle__icon::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav-toggle__icon::before { top: -6px; }
.nav-toggle__icon::after { top: 6px; }

.nav-toggle[aria-expanded="true"] .nav-toggle__icon {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__icon::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__icon::after {
  top: 0;
  transform: rotate(-45deg);
}

/* Panel de navegación móvil */
.mobile-nav {
  position: fixed;
  inset: var(--header-h) 0 0 0;
  z-index: 90;
  background: var(--surface-1);
  border-top: 1px solid var(--border);
  padding: var(--space-6) var(--container-pad) var(--space-8);
  overflow-y: auto;
  transform: translateY(-8px);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out), visibility 0s linear var(--dur-slow);
}

.mobile-nav.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out), visibility 0s;
}

.mobile-nav .nav-list {
  flex-direction: column;
  align-items: stretch;
  gap: var(--space-1);
}

.mobile-nav .nav-list a {
  display: block;
  padding: var(--space-4) var(--space-2);
  font-size: var(--fs-h4);
  border-bottom: 1px solid var(--border);
}

.mobile-nav .btn {
  width: 100%;
  margin-top: var(--space-5);
  justify-content: center;
}

body.nav-open {
  overflow: hidden;
}

@media (min-width: 1024px) {
  .main-nav {
    display: block;
  }

  .header-actions .btn {
    display: inline-flex;
  }

  .nav-toggle {
    display: none;
  }

  .mobile-nav {
    display: none;
  }
}

/* ---------------------------------------------------------------------- */
/* Footer                                                                  */
/* ---------------------------------------------------------------------- */

.site-footer {
  background: var(--surface-1);
  border-top: 1px solid var(--border);
  padding-block: var(--space-8) var(--space-6);
}

.footer-top {
  display: flex;
  flex-direction: column;
  gap: var(--space-7);
}

.footer-brand__mark {
  position: relative;
  display: inline-block;
  perspective: 700px;
}

.footer-brand__mark img {
  width: 96px;
  height: auto;
  display: block;
  border-radius: 0;
  outline: none;
  transform-style: preserve-3d;
  backface-visibility: hidden;
}

.footer-brand__mark .logo-shine {
  -webkit-mask-image: url(../imgs/logo/logo-full-transparent.webp);
  mask-image: url(../imgs/logo/logo-full-transparent.webp);
}

.footer-brand__mark:hover img,
.footer-brand__mark:focus-visible img {
  animation: logo-spin-3d 1800ms ease-in-out;
}

.footer-brand__mark:hover .logo-shine,
.footer-brand__mark:focus-visible .logo-shine {
  animation: logo-shine-flash 1800ms ease-in-out;
}

.footer-brand p {
  margin-top: var(--space-4);
  max-width: 320px;
  color: var(--text-tertiary);
  font-size: var(--fs-caption);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-6);
}

.footer-links a {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  transition: color var(--dur-base) var(--ease-out);
}

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

.footer-bottom {
  margin-top: var(--space-7);
  padding-top: var(--space-5);
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: space-between;
  font-size: var(--fs-caption);
  color: var(--text-muted);
}

@media (min-width: 768px) {
  .footer-top {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
  }
}

/* ---------------------------------------------------------------------- */
/* Grids genéricos                                                         */
/* ---------------------------------------------------------------------- */

.grid {
  display: grid;
  gap: var(--space-5);
  grid-template-columns: minmax(0, 1fr);
}

@media (min-width: 640px) {
  .grid--2, .grid--3, .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 1024px) {
  .grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (min-width: 1024px) {
  .grid--2-asym {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: center;
    gap: var(--space-8);
  }
}

/* ---------------------------------------------------------------------- */
/* Hero genérico (usado por todas las páginas interiores)                  */
/* ---------------------------------------------------------------------- */

.page-hero {
  padding-block: var(--space-8) var(--space-7);
}

.page-hero h1 {
  margin-top: var(--space-3);
  max-width: 720px;
}

.page-hero p.lead {
  margin-top: var(--space-4);
  max-width: 620px;
  font-size: var(--fs-body-lg);
  color: var(--text-secondary);
}

/* ---------------------------------------------------------------------- */
/* CTA de cierre reutilizable                                              */
/* ---------------------------------------------------------------------- */

.cta-band {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-8) var(--space-6);
  text-align: center;
}

.cta-band h2 {
  max-width: 620px;
  margin-inline: auto;
}

.cta-band p {
  max-width: 520px;
  margin: var(--space-4) auto 0;
  color: var(--text-secondary);
}

.cta-band .btn {
  margin-top: var(--space-6);
}

@media (min-width: 768px) {
  .cta-band {
    padding: var(--space-9) var(--space-8);
  }
}