/* ============================================================
   nav.css — barra de navegación (fondo oscuro)
   ============================================================ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-h);
  background: rgba(10, 13, 20, 0.55);
  backdrop-filter: saturate(160%) blur(0px);
  -webkit-backdrop-filter: saturate(160%) blur(0px);
  border-bottom: 1px solid transparent;
  transition: background 0.4s var(--ease), border-color 0.4s var(--ease),
              backdrop-filter 0.4s var(--ease), box-shadow 0.4s var(--ease);
}
.nav.is-scrolled {
  background: rgba(10, 13, 20, 0.82);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom-color: var(--line);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
}

.nav__inner {
  max-width: var(--maxw);
  height: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.nav__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.nav__logo {
  width: 40px;
  height: 40px;
  filter: drop-shadow(0 2px 10px rgba(74, 127, 224, 0.4));
}
.nav__brand-text {
  font-family: 'Sora', sans-serif;
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.nav__brand-accent { color: var(--blue-bright); }

.nav__links {
  display: flex;
  align-items: center;
  gap: 30px;
  margin-left: auto;
}
.nav__links a {
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--muted);
  position: relative;
  padding: 4px 0;
  transition: color 0.2s var(--ease);
}
.nav__links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  background: var(--blue-bright);
  box-shadow: 0 0 10px rgba(74, 127, 224, 0.6);
  transition: width 0.28s var(--ease);
}
.nav__links a:hover { color: var(--ink); }
.nav__links a:hover::after { width: 100%; }

.nav__actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}

/* Toggle idioma */
.lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: 'Sora', sans-serif;
  font-weight: 600;
  font-size: 0.82rem;
  color: var(--muted);
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}
.lang-toggle:hover { border-color: var(--line-strong); background: rgba(74, 127, 224, 0.06); }
.lang-toggle__opt {
  color: var(--muted);
  transition: color 0.2s var(--ease);
}
.lang-toggle__opt.is-active { color: var(--blue-bright); }
.lang-toggle__sep { color: var(--line-strong); }

.nav__cta { padding: 9px 18px; font-size: 0.9rem; }

/* Burger (móvil) */
.nav__burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 9px;
  border-radius: var(--radius-sm);
}
.nav__burger span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.2s var(--ease);
}
.nav__burger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__burger.is-open span:nth-child(2) { opacity: 0; }
.nav__burger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .nav__burger { display: flex; }

  .nav__links {
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: rgba(19, 24, 32, 0.98);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line);
    padding: 8px 24px 20px;
    margin-left: 0;
    box-shadow: var(--shadow-md);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
  }
  .nav__links.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav__links a {
    width: 100%;
    padding: 14px 0;
    border-bottom: 1px solid var(--line);
    font-size: 1rem;
    color: var(--ink);
  }
  .nav__links a::after { display: none; }

  .nav__cta { display: none; }
}

@media (max-width: 420px) {
  .nav__inner { padding: 0 16px; gap: 12px; }
  .nav__brand-text { font-size: 1.05rem; }
}