/* ==========================================================================
   layout.css — Contenedores, secciones, grillas, header y footer.
   ========================================================================== */

.container {
  width: 100%;
  max-width: calc(var(--container) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.container--narrow {
  max-width: calc(var(--container-narrow) + var(--gutter) * 2);
}

main {
  display: block;
  outline: none;
}

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

.section--tight {
  padding-block: var(--space-7);
}

.section--muted {
  background: var(--gradient-surface);
  border-block: 1px solid rgb(34 44 77 / 0.5);
}

.section__header {
  max-width: 640px;
  margin-bottom: var(--space-7);
}

.section__header--center {
  margin-inline: auto;
  text-align: center;
}

.section__title {
  margin-bottom: var(--space-6);
}

.section__header .section__title {
  margin-bottom: var(--space-4);
}

.section__header .lead:last-child {
  margin-bottom: 0;
}

.grid {
  display: grid;
  gap: var(--space-5);
}

.grid--2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 340px), 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr)); }
.grid--4 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 250px), 1fr)); }

/* Dos columnas: texto + vista previa */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: clamp(2rem, 1rem + 5vw, 5rem);
}

@media (max-width: 900px) {
  .split {
    grid-template-columns: 1fr;
  }
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: rgb(7 11 26 / 0.72);
  -webkit-backdrop-filter: saturate(160%) blur(16px);
  backdrop-filter: saturate(160%) blur(16px);
  border-bottom: 1px solid rgb(34 44 77 / 0.6);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  min-height: var(--header-height);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-weight: var(--fw-semibold);
  font-size: 1.0625rem;
  letter-spacing: var(--tracking-tight);
  color: var(--color-ink);
  text-decoration: none;
}

.brand:hover,
.brand--light,
.brand--light:hover {
  color: var(--color-ink);
}

.brand__mark {
  border-radius: 10px;
  box-shadow: 0 6px 18px -6px rgb(204 51 102 / 0.7);
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav__item {
  position: relative;
  display: flex;
  align-items: center;
}

.nav__link {
  display: block;
  padding: var(--space-2) var(--space-3);
  font-weight: var(--fw-medium);
  font-size: var(--fs-sm);
  color: var(--color-muted);
  text-decoration: none;
  border-radius: var(--radius-pill);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

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

.nav__link.is-active {
  background: rgb(26 35 64 / 0.7);
}

.nav__sub-toggle {
  position: relative;
  width: 24px;
  height: 24px;
  margin-left: -4px;
  color: var(--color-muted);
  border-radius: var(--radius-sm);
}

.nav__sub-toggle::before {
  content: "";
  position: absolute;
  inset: 0;
  margin: auto;
  width: 6px;
  height: 6px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: translateY(-2px) rotate(45deg);
  transition: transform var(--transition-fast);
}

.nav__sub-toggle[aria-expanded="true"]::before {
  transform: translateY(1px) rotate(-135deg);
}

.nav__sub {
  min-width: 270px;
  padding: var(--space-2);
  background: rgb(12 18 38 / 0.92);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
  border: 1px solid rgb(34 44 77 / 0.8);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lift), var(--shadow-inset);
}

.nav__sub-link {
  display: block;
  padding: var(--space-2) var(--space-3);
  font-size: var(--fs-sm);
  color: var(--color-text);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.nav__sub-link:hover,
.nav__sub-link[aria-current="page"] {
  background: var(--color-surface-2);
  color: var(--color-ink);
}

.nav-toggle {
  display: none;
  position: relative;
  width: 44px;
  height: 44px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: rgb(18 26 51 / 0.7);
}

.nav-toggle__bar,
.nav-toggle__bar::before,
.nav-toggle__bar::after {
  position: absolute;
  left: 13px;
  width: 16px;
  height: 1.5px;
  background: var(--color-ink);
  border-radius: 2px;
  transition: transform var(--transition), background-color var(--transition-fast);
}

.nav-toggle__bar { top: 21px; }
.nav-toggle__bar::before,
.nav-toggle__bar::after { content: ""; left: 0; }
.nav-toggle__bar::before { transform: translateY(-5px); }
.nav-toggle__bar::after { transform: translateY(5px); }

.nav-toggle[aria-expanded="true"] .nav-toggle__bar { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar::before { transform: rotate(45deg); background: var(--color-ink); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar::after { transform: rotate(-45deg); background: var(--color-ink); }

/* Escritorio: submenú desplegable */
@media (min-width: 961px) {
  .nav__sub {
    position: absolute;
    top: calc(100% + 8px);
    left: -12px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  }

  /* Puente invisible para no perder el hover entre enlace y submenú */
  .nav__item--has-children::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    height: 12px;
  }

  .nav__item--has-children:hover .nav__sub,
  .nav__item--has-children:focus-within .nav__sub,
  .nav__sub-toggle[aria-expanded="true"] + .nav__sub {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
}

/* Móvil: panel a pantalla completa */
@media (max-width: 960px) {
  .js .nav-toggle {
    display: block;
  }

  .nav {
    position: fixed;
    inset: var(--header-height) 0 0 0;
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-5) var(--gutter);
    background: var(--color-bg);
    overflow-y: auto;
  }

  .js .nav {
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  }

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

  html:not(.js) .nav {
    position: static;
  }

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

  .nav__item {
    flex-wrap: wrap;
    justify-content: space-between;
    border-bottom: 1px solid rgb(34 44 77 / 0.6);
  }

  .nav__link {
    padding: var(--space-4) 0;
    font-size: var(--fs-md);
    color: var(--color-ink);
  }

  .nav__link.is-active {
    background: none;
    color: var(--color-accent-soft);
  }

  .nav__sub-toggle {
    width: 44px;
    height: 44px;
  }

  .nav__sub {
    flex-basis: 100%;
    padding: 0 0 var(--space-3);
    background: none;
    border: 0;
    box-shadow: none;
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
  }

  .js .nav__sub-toggle[aria-expanded="false"] + .nav__sub {
    display: none;
  }

  .nav__cta {
    margin-top: var(--space-6);
  }

  body.nav-open {
    overflow: hidden;
  }
}

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

.site-footer {
  position: relative;
  padding-top: var(--space-8);
  font-size: var(--fs-sm);
  color: var(--color-muted);
  background: var(--color-bg);
  border-top: 1px solid rgb(34 44 77 / 0.6);
}

/* Línea de luz con el degradado de marca en el borde superior */
.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 50%;
  width: min(720px, 80%);
  height: 1px;
  transform: translateX(-50%);
  background: linear-gradient(90deg, transparent, rgb(255 106 156 / 0.7), rgb(124 140 255 / 0.7), transparent);
}

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

.site-footer a:hover {
  color: var(--color-ink);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.6fr repeat(3, 1fr);
  gap: var(--space-7);
  padding-bottom: var(--space-7);
}

.site-footer__text {
  margin-block: var(--space-4);
  max-width: 340px;
}

.site-footer__title {
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  letter-spacing: 0;
  color: var(--color-ink);
  margin-bottom: var(--space-4);
}

.site-footer__links {
  display: grid;
  gap: var(--space-3);
}

.social {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.social a {
  display: inline-flex;
  padding: 0.35rem 0.85rem;
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: rgb(18 26 51 / 0.6);
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.social a:hover {
  border-color: rgb(255 106 156 / 0.5);
}

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-3);
  padding-block: var(--space-5);
  border-top: 1px solid rgb(34 44 77 / 0.6);
  font-size: var(--fs-xs);
}

@media (max-width: 860px) {
  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
  }

  .site-footer__col--brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 480px) {
  .site-footer__grid {
    grid-template-columns: 1fr;
  }
}