/* ============================================================
   NAVBAR
   ============================================================ */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-navbar);
  padding: 1.25rem clamp(1.5rem, 5vw, 5rem);
  background: transparent;
  transition: background-color 0.4s ease,
              backdrop-filter 0.4s ease,
              padding 0.4s ease,
              border-color 0.4s ease,
              box-shadow 0.4s ease;
  border-bottom: 1px solid transparent;
}

.navbar.is-scrolled {
  background: rgba(10, 26, 53, 0.78);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  padding-top: 0.875rem;
  padding-bottom: 0.875rem;
  border-bottom-color: var(--color-border-soft);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.18);
}

.navbar__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

/* ---- Logo ---- */
.navbar__brand {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  transition: opacity 0.2s ease, transform 0.3s var(--ease-out-quart);
}
.navbar__brand:hover,
.navbar__brand:focus-visible {
  opacity: 0.85;
  transform: translateY(-1px);
}

.navbar__logo {
  display: block;
  height: 38px;
  width: auto;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
}

/* En móvil reducir un poco el tamaño */
@media (max-width: 640px) {
  .navbar__logo { height: 32px; }
}

/* ---- Menú desktop ---- */
.navbar__nav {
  display: flex;
  gap: 2.25rem;
}
.navbar__link {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: color 0.25s ease;
  position: relative;
  padding: 0.25rem 0;
}
.navbar__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, var(--color-cyan-bright), var(--color-cyan-electric));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease-out-quart);
}
.navbar__link:hover,
.navbar__link:focus-visible {
  color: var(--color-text-primary);
}
.navbar__link:hover::after,
.navbar__link:focus-visible::after {
  transform: scaleX(1);
}

/* ---- Toggle mobile ---- */
.navbar__toggle {
  display: none;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid var(--color-border-strong);
  border-radius: 4px;
  cursor: pointer;
  padding: 0;
  position: relative;
  transition: border-color 0.2s ease;
}
.navbar__toggle:hover {
  border-color: var(--color-cyan-bright);
}
.navbar__toggle-bar {
  position: absolute;
  left: 50%;
  width: 18px;
  height: 1.5px;
  background: var(--color-text-primary);
  transition: transform 0.3s ease, opacity 0.3s ease, top 0.3s ease;
  transform: translateX(-50%);
}
.navbar__toggle-bar:nth-child(1) { top: 15px; }
.navbar__toggle-bar:nth-child(2) { top: 21px; }
.navbar__toggle-bar:nth-child(3) { top: 27px; }

.navbar__toggle[aria-expanded="true"] .navbar__toggle-bar:nth-child(1) {
  top: 21px;
  transform: translateX(-50%) rotate(45deg);
}
.navbar__toggle[aria-expanded="true"] .navbar__toggle-bar:nth-child(2) {
  opacity: 0;
}
.navbar__toggle[aria-expanded="true"] .navbar__toggle-bar:nth-child(3) {
  top: 21px;
  transform: translateX(-50%) rotate(-45deg);
}

/* ============================================================
   MENÚ MOBILE
   ============================================================ */
@media (max-width: 767px) {
  .navbar__nav {
    position: fixed;
    inset: 0;
    z-index: var(--z-overlay-mobile);
    background: rgba(5, 8, 16, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    opacity: 0;
    pointer-events: none;
    transform: translateY(-12px);
    transition: opacity 0.35s ease, transform 0.35s ease;
  }
  .navbar__nav.is-open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }
  .navbar__link {
    font-size: 1.375rem;
    letter-spacing: 0.05em;
  }
  .navbar__toggle {
    display: block;
    z-index: calc(var(--z-overlay-mobile) + 1);
  }
}

@media (max-width: 1024px) and (min-width: 768px) {
  .navbar__nav { gap: 1.5rem; }
  .navbar__link { font-size: 0.8125rem; }
}