/* ============================================================
   FRAMEWORK PERSONAL — navbar.css
   Requiere tokens.css. Breakpoint de corte desktop/mobile: 860px
   (--bp-lg en tokens.css, documentado ahí; se usa literal aquí
   porque las media queries no leen custom properties).

   Estructura esperada: ver navbar.html
   Estados via clase: .header.scrolled (JS la añade pasado 30px
   de scroll), .hamburger.open, .mobile-nav.open, .nav a.active
   ============================================================ */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  z-index: var(--z-header);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--section-pad-x);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 0.5px solid var(--border);
  transition: box-shadow 0.3s;
}
.header.scrolled {
  box-shadow: var(--shadow-header);
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.logo-img {
  height: 36px;
  width: auto;
  transition: opacity 0.3s;
}
.logo:hover .logo-img {
  opacity: 0.85;
}

/* ── NAV DESKTOP ─────────────────────────────────────────────── */
.nav {
  display: flex;
  align-items: center;
  gap: 2.5rem;
}
.nav a {
  font-size: 0.68rem;
  font-weight: 400;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-muted);
  position: relative;
  transition: color 0.25s;
  padding: 4px 0;
}
.nav a::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width 0.35s var(--ease);
}
.nav a:hover,
.nav a.active {
  color: var(--text);
}
.nav a:hover::after,
.nav a.active::after {
  width: 100%;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 1.2rem;
}

/* ── SELECTOR DE IDIOMA ──────────────────────────────────────── */
.lang-group {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}
.lang-opt {
  background: none;
  border: none;
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  color: var(--text-dim);
  padding: 6px 3px;
  transition: color 0.2s;
}
.lang-opt:hover {
  color: var(--text-muted);
}
.lang-opt.active {
  color: var(--accent);
  font-weight: 500;
}
.lang-sep {
  color: var(--text-dim);
  font-size: 0.6rem;
  pointer-events: none;
}

/* ── HAMBURGUESA ─────────────────────────────────────────────── */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 11px 8px;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 1px;
  background: var(--text);
  transition: transform 0.35s var(--ease), opacity 0.3s;
}
.hamburger.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ── NAV MOBILE — overlay pantalla completa ─────────────────── */
.mobile-nav {
  position: fixed;
  inset: 0;
  background: var(--bg);
  z-index: var(--z-mobile-nav);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.8rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s var(--ease);
}
.mobile-nav.open {
  opacity: 1;
  pointer-events: all;
}
.mobile-nav a {
  font-family: var(--font-display);
  font-size: clamp(2rem, 8vw, 3.5rem);
  color: var(--text-muted);
  min-height: 44px; /* objetivo táctil mínimo — accesibilidad */
  display: flex;
  align-items: center;
  padding: 0 1rem;
  border-left: 2px solid transparent;
  transition: color 0.25s, border-color 0.25s;
}
.mobile-nav a:hover,
.mobile-nav a.active {
  color: var(--accent);
}
.mobile-nav a.active {
  border-left-color: var(--accent);
}

@media (max-width: 860px) {
  .nav,
  .header-right .lang-group,
  .header-right .btn-header {
    display: none;
  }
  .hamburger {
    display: flex;
  }
  .mobile-nav {
    display: flex;
  }
}
@media (min-width: 861px) {
  .mobile-nav {
    display: none;
  }
}