/* ==========================================================================
   Navbar — sticky, aparece al salir del hero, con indicador de "nudo"
   ========================================================================== */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--navbar-height);
  display: flex;
  align-items: center;
  justify-content: center;

  background-color: rgba(3, 50, 74, 0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--navy-700);

  transform: translateY(-100%);
  transition: transform var(--transition-medium);
}

.navbar.is-visible {
  transform: translateY(0);
}

.navbar__list {
  position: relative;
  display: flex;
  gap: var(--space-md);
}

.navbar__link {
  position: relative;
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--off-white);
  opacity: 0.75;
  padding: var(--space-xs) 0;
  transition: opacity var(--transition-fast);
}

.navbar__link:hover {
  opacity: 1;
}

.navbar__link.is-active {
  opacity: 1;
}

/* El "nudo" — indicador que se desliza entre links activos */
.navbar__indicator {
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 0;
  height: 3px;
  background-color: var(--brick);
  border-radius: 100vh;
  transition: left var(--transition-medium), width var(--transition-medium);
}

.navbar__indicator::before {
  content: "";
  position: absolute;
  top: -3px;
  left: 50%;
  transform: translateX(-50%);
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--brick);
}

@media (max-width: 950px) {
  .navbar {
    min-height: var(--navbar-height);
  }

  .navbar__list {
    width: 100%;
    max-width: 100%;
    gap: var(--space-sm);
    padding: 0 var(--space-sm);
    overflow-x: auto;
    justify-content: flex-start;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
  }

  .navbar__list::-webkit-scrollbar {
    display: none;
  }

  .navbar__link {
    font-size: var(--fs-xs);
    white-space: nowrap;
    padding: var(--space-xs) 0;
  }
}

@media (max-width: 640px) {
  .navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    padding: var(--space-xs) 0;
  }

  .navbar__list {
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-xs);
    padding: 0 var(--space-sm);
    overflow-x: hidden;
  }

  .navbar__link {
    font-size: 0.78rem;
    white-space: normal;
    text-align: center;
  }
}