/* ==========================================================================
   LAYOUT — Contenedor, header, secciones, bento grid y footer
   ========================================================================== */

.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ==========================================================================
   HEADER
   ========================================================================== */

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: var(--z-sticky);
  padding-block: var(--sp-4);
  transition: padding var(--t-base) var(--ease), background-color var(--t-base) var(--ease),
    border-color var(--t-base) var(--ease);
  border-bottom: 1px solid transparent;
}

/* Se compacta y opaca al hacer scroll (micro-interaccion de contexto). */
.site-header.is-scrolled {
  padding-block: var(--sp-3);
  background-color: rgba(13, 4, 40, 0.78);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom-color: var(--c-line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-5);
}

/* --- Logo ---------------------------------------------------------------- */

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  flex-shrink: 0;
}

/* El logo se pinta con mask para poder recolorearlo desde CSS (un solo SVG). */
.brand__mark {
  width: 42px;
  aspect-ratio: 1024 / 856;
  background-color: var(--c-text);
  -webkit-mask: url('../../assets/img/logo.svg') center / contain no-repeat;
  mask: url('../../assets/img/logo.svg') center / contain no-repeat;
  transition: background-color var(--t-base) var(--ease), transform var(--t-base) var(--ease-out);
}

.brand:hover .brand__mark {
  background-color: var(--c-accent);
  transform: translateY(-2px);
}

.brand__slogan {
  font-size: var(--fs-micro);
  letter-spacing: 0.08em;
  color: var(--c-text-dim);
}

/* --- Navegacion ---------------------------------------------------------- */

.nav {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}

.nav__link {
  position: relative;
  padding: var(--sp-2) var(--sp-3);
  font-size: var(--fs-small);
  color: var(--c-text-muted);
  border-radius: var(--r-sm);
  transition: color var(--t-fast) var(--ease);
}

.nav__link::after {
  content: '';
  position: absolute;
  left: var(--sp-3);
  right: var(--sp-3);
  bottom: 2px;
  height: 1.5px;
  background: var(--c-accent);
  border-radius: var(--r-pill);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t-base) var(--ease-out);
}

.nav__link:hover,
.nav__link.is-active {
  color: var(--c-text);
}

.nav__link:hover::after,
.nav__link.is-active::after {
  transform: scaleX(1);
}

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

/* --- Boton hamburguesa (solo movil) -------------------------------------- */

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  place-items: center;
  /* Sin esto las filas se estiran y las barras quedan demasiado separadas
     para que el giro de 45 grados las cruce en una X. */
  align-content: center;
  border: 1px solid var(--c-line);
  border-radius: var(--r-sm);
  transition: border-color var(--t-fast) var(--ease), background-color var(--t-fast) var(--ease);
}

.nav-toggle:hover {
  border-color: var(--c-brand-line);
  background: var(--c-brand-soft);
}

.nav-toggle__bar {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--c-text);
  border-radius: var(--r-pill);
  transition: transform var(--t-base) var(--ease-out), opacity var(--t-fast) var(--ease);
}

.nav-toggle__bar + .nav-toggle__bar {
  margin-top: 4px;
}

.nav-toggle[aria-expanded='true'] .nav-toggle__bar:nth-child(1) {
  transform: translateY(5.5px) rotate(45deg);
}

.nav-toggle[aria-expanded='true'] .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded='true'] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-5.5px) rotate(-45deg);
}

/* ==========================================================================
   SECCIONES
   ========================================================================== */

.section {
  padding-block: var(--section-y);
  position: relative;
}

.section-head {
  max-width: 62ch;
  margin-bottom: var(--sp-7);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  margin-bottom: var(--sp-4);
  font-family: var(--font-title);
  font-size: var(--fs-micro);
  font-weight: 600;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--c-accent);
}

.eyebrow::before {
  content: '';
  width: 22px;
  height: 1px;
  background: currentColor;
}

.section-lead {
  margin-top: var(--sp-4);
  max-width: 58ch;
  color: var(--c-text-muted);
}

/* ==========================================================================
   HERO
   ========================================================================== */

.hero {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 100svh;
  padding-block: calc(var(--section-y) * 0.85) var(--sp-6);
  overflow: hidden;
}

.hero__inner {
  position: relative;
  z-index: 1;
  flex: 1;
  display: grid;
  gap: var(--sp-7);
  align-items: center;
}

@media (min-width: 900px) {
  .hero__inner {
    grid-template-columns: 1.15fr 0.85fr;
    gap: var(--sp-8);
  }
}

.hero__status {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  font-size: var(--fs-micro);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--c-text-muted);
}

.hero__title {
  display: flex;
  flex-wrap: wrap;
  gap: 0 0.28em;
  margin-top: var(--sp-4);
  font-size: var(--fs-display);
  font-weight: 800;
}

.hero__title-accent {
  color: var(--c-accent);
}

.hero__role {
  margin-top: var(--sp-3);
  font-family: var(--font-title);
  font-size: var(--fs-h3);
  font-weight: 600;
}

.hero__lead {
  margin-top: var(--sp-4);
  max-width: 52ch;
  color: var(--c-text-muted);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
  margin-top: var(--sp-6);
}

.hero__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin-top: var(--sp-5);
  padding-top: var(--sp-5);
  border-top: 1px solid var(--c-line);
}

.hero__visual {
  display: grid;
  place-items: center;
}

.hero__foot {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
  padding-top: var(--sp-6);
}

/* ==========================================================================
   BENTO GRID — cuadricula asimetrica (tendencia 01 del examen)
   ========================================================================== */

.bento {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--sp-4);
}

.bento > * {
  grid-column: span 6;
}

@media (min-width: 720px) {
  .bento {
    gap: var(--sp-5);
  }

  .bento__span-2 {
    grid-column: span 2;
  }
  .bento__span-3 {
    grid-column: span 3;
  }
  .bento__span-4 {
    grid-column: span 4;
  }
}

/* Grid de dos columnas para bloques de texto + apoyo visual. */
.split {
  display: grid;
  gap: var(--sp-6);
  align-items: start;
}

@media (min-width: 900px) {
  .split {
    grid-template-columns: 1.05fr 0.95fr;
    gap: var(--sp-8);
    align-items: center;
  }
}

/* ==========================================================================
   FOOTER
   ========================================================================== */

.site-footer {
  border-top: 1px solid var(--c-line);
  padding-block: var(--sp-7) var(--sp-6);
  background: linear-gradient(180deg, transparent, rgba(133, 25, 247, 0.06));
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-5);
}

.footer-meta {
  font-size: var(--fs-small);
  color: var(--c-text-dim);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-5);
  font-size: var(--fs-small);
}

.footer-links a {
  color: var(--c-text-muted);
  transition: color var(--t-fast) var(--ease);
}

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

/* ==========================================================================
   RESPONSIVE — menu movil
   ========================================================================== */

@media (max-width: 860px) {
  .nav-toggle {
    display: grid;
  }

  .nav {
    position: fixed;
    inset: 0 0 0 auto;
    width: min(320px, 84vw);
    flex-direction: column;
    align-items: stretch;
    justify-content: center;
    gap: var(--sp-2);
    padding: var(--sp-7) var(--sp-6);
    background: var(--c-base-800);
    border-left: 1px solid var(--c-line);
    box-shadow: var(--shadow-lg);
    transform: translateX(100%);
    visibility: hidden;
    transition: transform var(--t-slow) var(--ease-out), visibility var(--t-slow);
  }

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

  .nav__link {
    padding: var(--sp-4);
    font-size: 1.05rem;
    border-bottom: 1px solid var(--c-line);
    border-radius: 0;
  }

  .nav__link::after {
    display: none;
  }

  .brand__slogan {
    display: none;
  }
}

/* Velo detras del menu movil. */
.nav-scrim {
  position: fixed;
  inset: 0;
  z-index: calc(var(--z-sticky) - 1);
  background: rgba(5, 1, 16, 0.6);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--t-base) var(--ease), visibility var(--t-base);
}

.nav-scrim.is-visible {
  opacity: 1;
  visibility: visible;
}