/* ============================================================
   THM — Navbar Component
   Navbar fija con scroll behavior, glassmorphism y mobile menu.
   ============================================================ */

/* ----------------------------------------------------------
   NAVBAR BASE
   ---------------------------------------------------------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-navbar);
  height: var(--navbar-height);
  transition: background var(--transition-base),
              box-shadow var(--transition-base),
              height var(--transition-base);
}

/* Estado inicial — transparente sobre el hero */
.navbar::before {
  content: '';
  position: absolute;
  inset: 0;
  background: transparent;
  backdrop-filter: none;
  transition: background var(--transition-base),
              backdrop-filter var(--transition-base);
}

/* Estado scrolled — glassmorphism activo */
.navbar.is-scrolled::before {
  background: rgba(10, 10, 20, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
}

.navbar.is-scrolled {
  box-shadow: 0 1px 0 var(--color-border),
              0 4px 24px rgba(0, 0, 0, 0.4);
}

/* ----------------------------------------------------------
   INNER — flex layout
   ---------------------------------------------------------- */
.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  position: relative;
  z-index: 1;
  gap: var(--space-8);
}

/* ----------------------------------------------------------
   LOGO
   ---------------------------------------------------------- */
.navbar__logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  flex-shrink: 0;
}

.navbar__logo-mark {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-tight);
  background: var(--color-accent-grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

/* ----------------------------------------------------------
   NAV LINKS — desktop
   ---------------------------------------------------------- */
.navbar__links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
  margin: 0;
  padding: 0;
}

.navbar__link {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-muted);
  text-decoration: none;
  letter-spacing: var(--tracking-wide);
  padding: var(--space-1) 0;
  position: relative;
  transition: color var(--transition-fast);
}

.navbar__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent-grad);
  transition: width var(--transition-base);
}

.navbar__link:hover {
  color: var(--color-text-primary);
}

.navbar__link:hover::after,
.navbar__link.is-active::after {
  width: 100%;
}

.navbar__link.is-active {
  color: var(--color-text-primary);
}

/* ----------------------------------------------------------
   ACCIONES — derecha
   ---------------------------------------------------------- */
.navbar__actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-shrink: 0;
}

/* ----------------------------------------------------------
   SELECTOR DE IDIOMA
   ---------------------------------------------------------- */
.lang-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wider);
  color: var(--color-text-muted);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
}

.lang-toggle:hover {
  color: var(--color-text-primary);
  border-color: var(--color-border-hover);
}

.lang-toggle svg {
  transition: transform var(--transition-fast);
}

.lang-toggle[aria-expanded="true"] svg {
  transform: rotate(180deg);
}

/* Dropdown */
.lang-dropdown[hidden] {
  display: none !important;
}

.lang-dropdown {
  position: absolute;
  top: calc(100% + var(--space-2));
  right: 0;
  z-index: var(--z-dropdown);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-2);
  min-width: 120px;
  box-shadow: var(--shadow-lg);
  animation: fadeInDown var(--transition-fast) ease both;
}

.lang-dropdown button {
  display: block;
  width: 100%;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-muted);
  text-align: left;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.lang-dropdown button:hover {
  background: var(--color-surface-hover);
  color: var(--color-text-primary);
}

.lang-dropdown button[aria-selected="true"] {
  color: var(--color-accent-2);
  background: rgba(6, 182, 212, 0.08);
}

/* ----------------------------------------------------------
   NAVBAR CTA
   ---------------------------------------------------------- */
.navbar__cta {
  padding: var(--space-2) var(--space-5);
  font-size: var(--text-sm);
}

/* ----------------------------------------------------------
   BURGER — mobile
   ---------------------------------------------------------- */
.navbar__burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}

.navbar__burger:hover {
  background: var(--color-surface-hover);
}

.navbar__burger-line {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--color-text-primary);
  border-radius: 2px;
  transition: transform var(--transition-base),
              opacity var(--transition-base),
              width var(--transition-base);
  transform-origin: center;
}

/* Estado abierto — X */
.navbar__burger[aria-expanded="true"] .navbar__burger-line:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.navbar__burger[aria-expanded="true"] .navbar__burger-line:nth-child(2) {
  opacity: 0;
  width: 0;
}
.navbar__burger[aria-expanded="true"] .navbar__burger-line:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* ----------------------------------------------------------
   MOBILE MENU
   ---------------------------------------------------------- */
.mobile-menu[hidden] {
  display: none !important;
}

.mobile-menu {
  position: fixed;
  inset: var(--navbar-height) 0 0 0;
  z-index: calc(var(--z-navbar) - 1);
  background: rgba(10, 10, 20, 0.97);
  backdrop-filter: blur(24px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  padding: var(--space-8);
  animation: fadeIn var(--transition-base) ease both;
}

.mobile-menu ul {
  list-style: none;
  padding: 0;
  margin: 0;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.mobile-menu__link {
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: var(--weight-bold);
  color: var(--color-text-muted);
  letter-spacing: var(--tracking-tight);
  transition: color var(--transition-fast);
}

.mobile-menu__link:hover {
  color: var(--color-text-primary);
}

/* ----------------------------------------------------------
   RESPONSIVE
   ---------------------------------------------------------- */
@media (max-width: 1024px) {
  .navbar__links {
    display: none;
  }
  .navbar__cta {
    display: none;
  }
  .navbar__burger {
    display: flex;
  }
}

@media (max-width: 640px) {
  .lang-toggle {
    display: none; /* visible en mobile-menu */
  }
}