/* ============================================================
   pilot.cr — layout.css
   Header, footer, navegación, sidebar de toc legales.
   Diferenciación vs nabu.me: header transparente con blur al
   scroll (vs header oscuro fijo de nabu.me); footer claro de
   4 columnas (vs footer oscuro de 3 columnas de nabu.me).
   ============================================================ */

/* ============================================================
   Header (transparente con blur al scroll)
   ============================================================ */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  z-index: 1000;
  background: var(--color-nav-bg);
  border-bottom: 1px solid var(--color-nav-border);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  transition: background var(--transition-base),
              border-color var(--transition-base),
              box-shadow var(--transition-base);
}

.site-header.is-scrolled {
  background: var(--color-nav-bg-scrolled);
  border-bottom-color: var(--color-nav-border-scrolled);
  box-shadow: 0 4px 16px rgba(20, 33, 26, 0.05);
}

.site-header__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
  gap: var(--space-8);
}

.site-header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 900;
  font-size: var(--font-size-xl);
  color: var(--color-text);
  letter-spacing: var(--letter-spacing-tight);
}

.site-header__logo img,
.site-header__logo svg {
  height: 30px;
  width: auto;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  flex: 1;
  justify-content: center;
}

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

.site-nav__link {
  color: var(--color-nav-text-muted);
  font-size: 0.95rem;
  font-weight: 700;
  position: relative;
  padding: var(--space-2) 0;
  transition: color var(--transition-fast);
}

.site-nav__link::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 2px;
  background: var(--color-primary);
  transition: width var(--transition-base);
  border-radius: 1px;
}

.site-nav__link:hover,
.site-nav__link[aria-current="page"] {
  color: var(--color-text);
}
.site-nav__link:hover::after,
.site-nav__link[aria-current="page"]::after { width: 100%; }

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

/* Dropdown de idiomas (botón en header) */
.lang-switcher {
  position: relative;
}
.lang-switcher__button {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  background: var(--color-bg-surface);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text);
  transition: all var(--transition-fast);
}
.lang-switcher__button:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.lang-switcher__flag {
  width: 18px; height: 18px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--color-border);
}
.lang-switcher__menu {
  position: absolute;
  top: calc(100% + 8px); right: 0;
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  min-width: 180px;
  padding: var(--space-1);
  opacity: 0; visibility: hidden;
  transform: translateY(-6px);
  transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
}
.lang-switcher.is-open .lang-switcher__menu {
  opacity: 1; visibility: visible; transform: translateY(0);
}
.lang-switcher__option {
  display: flex; align-items: center; gap: var(--space-2);
  width: 100%;
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  text-align: left;
  transition: background var(--transition-fast);
}
.lang-switcher__option:hover { background: var(--color-soft-neutral-bg); }
.lang-switcher__option[aria-current="true"] {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  font-weight: 700;
}

/* Botón hamburguesa (mobile) */
.site-header__toggle {
  display: none;
  width: 40px; height: 40px;
  border-radius: var(--radius-sm);
  align-items: center; justify-content: center;
}
.site-header__toggle svg { width: 22px; height: 22px; }

/* ============================================================
   Mobile menu (drawer)
   ============================================================ */

/* Default: oculto en desktop. Se activa solo en mobile (ver media query abajo). */
.mobile-drawer { display: none; }

@media (max-width: 1023px) {
  .mobile-drawer { display: block; }
  .site-nav { display: none; }
  .site-header__toggle { display: inline-flex; }
  .site-header__right .btn--cta { display: none; }

  .mobile-drawer {
    position: fixed;
    inset: var(--nav-height) 0 0 0;
    background: var(--color-bg-surface);
    z-index: 990;
    overflow-y: auto;
    padding: var(--space-6);
    transform: translateX(100%);
    transition: transform var(--transition-slow);
    visibility: hidden;
  }
  .mobile-drawer.is-open {
    transform: translateX(0);
    visibility: visible;
  }
  .mobile-drawer__list {
    display: flex; flex-direction: column; gap: var(--space-4);
  }
  .mobile-drawer__link {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    color: var(--color-text);
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--color-border-light);
  }
  .mobile-drawer__cta {
    margin-top: var(--space-6);
  }
}

/* ============================================================
   Footer (claro, 4 columnas — diferenciado vs nabu.me)
   ============================================================ */

.site-footer {
  background: var(--color-footer-bg);
  color: var(--color-footer-text);
  padding: var(--space-20) 0 var(--space-8);
  border-top: 1px solid var(--color-footer-border);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--space-12);
  align-items: start;
}

.site-footer__brand-col p {
  color: var(--color-footer-text-muted);
  font-size: var(--font-size-sm);
  max-width: 280px;
  margin-top: var(--space-3);
}

.site-footer__logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 900;
  font-size: var(--font-size-xl);
  color: var(--color-text);
  margin-bottom: var(--space-4);
}
.site-footer__logo img,
.site-footer__logo svg {
  height: 30px;
  width: auto;
}

.site-footer__heading {
  font-size: var(--font-size-xs);
  font-weight: 800;
  color: var(--color-text);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-3);
}

.site-footer__links {
  display: flex; flex-direction: column; gap: var(--space-2);
}
.site-footer__link {
  color: var(--color-footer-text);
  font-size: 0.95rem;
  font-weight: 600;
  transition: color var(--transition-fast);
}
.site-footer__link:hover { color: var(--color-primary); }

.site-footer__bottom {
  margin-top: var(--space-16);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
  font-size: var(--font-size-xs);
  color: var(--color-footer-text-muted);
}

.site-footer__social {
  display: flex; gap: var(--space-3);
}
.site-footer__social a {
  width: 36px; height: 36px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: var(--radius-full);
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  color: var(--color-footer-text);
  transition: all var(--transition-fast);
}
.site-footer__social a:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-2px);
}
.site-footer__social svg { width: 16px; height: 16px; }

/* ============================================================
   Main + content offset (compensar header fijo)
   ============================================================ */

.site-main {
  padding-top: var(--nav-height);
  min-height: calc(100vh - var(--nav-height));
}

/* Breadcrumb */
.breadcrumb {
  padding: var(--space-6) 0 0;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}
.breadcrumb__list {
  display: flex; flex-wrap: wrap; gap: var(--space-2);
  align-items: center;
}
.breadcrumb__list li::after {
  content: '/';
  margin-left: var(--space-2);
  color: var(--color-text-light);
}
.breadcrumb__list li:last-child::after { display: none; }
.breadcrumb a {
  color: var(--color-text-muted);
}
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb [aria-current="page"] {
  color: var(--color-text);
  font-weight: 600;
}

/* TOC sticky (para legales) */
.toc-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: var(--space-12);
  align-items: start;
}
@media (max-width: 1023px) {
  .toc-layout { grid-template-columns: 1fr; }
  .toc-layout__toc { position: static; }
}
.toc-layout__toc {
  position: sticky;
  top: calc(var(--nav-height) + var(--space-6));
  padding: var(--space-4);
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  max-height: calc(100vh - var(--nav-height) - var(--space-12));
  overflow-y: auto;
}
.toc-layout__toc h3 {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-3);
}
.toc-layout__toc ol {
  list-style: none;
  padding: 0;
  display: flex; flex-direction: column; gap: var(--space-1);
}
.toc-layout__toc a {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  font-weight: 500;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-xs);
  display: block;
  transition: all var(--transition-fast);
}
.toc-layout__toc a:hover,
.toc-layout__toc a.is-active {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
}