/*
  components/nav.css
  Cabecera fija. Gana un fondo sólido y una línea inferior solo después
  de hacer scroll (clase .is-scrolled, aplicada por js/modules/nav.js);
  sobre el hero parte transparente para no tapar el panel.
*/

.nav {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-4);
  background: transparent;
  border-bottom: 1px solid transparent;
  transition:
    background-color var(--duration-base) var(--ease-out),
    border-color var(--duration-base) var(--ease-out);
}

.nav.is-scrolled {
  background: rgba(10, 14, 24, 0.88);
  backdrop-filter: blur(10px);
  border-bottom-color: var(--steel-500);
}

.nav__inner {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
}

.nav__brand {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: var(--tracking-tight);
  text-decoration: none;
  color: var(--text-primary);
}

.nav__brand span {
  color: var(--brand-green);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav__link {
  font-size: var(--size-small);
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

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

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.nav__toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--steel-500);
  border-radius: var(--radius-sm);
  width: 2.5rem;
  height: 2.5rem;
  align-items: center;
  justify-content: center;
}

.nav__toggle-bar,
.nav__toggle-bar::before,
.nav__toggle-bar::after {
  display: block;
  width: 1.1rem;
  height: 2px;
  background: var(--text-primary);
  position: relative;
  transition: transform var(--duration-fast) var(--ease-out);
}

.nav__toggle-bar::before,
.nav__toggle-bar::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav__toggle-bar::before {
  top: -6px;
}

.nav__toggle-bar::after {
  top: 6px;
}

.nav.is-open .nav__toggle-bar {
  background: transparent;
}

.nav.is-open .nav__toggle-bar::before {
  top: 0;
  transform: rotate(45deg);
}

.nav.is-open .nav__toggle-bar::after {
  top: 0;
  transform: rotate(-45deg);
}

@media (max-width: 56rem) {
  .nav__toggle {
    display: inline-flex;
  }

  .nav__links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-1);
    padding: var(--space-4) var(--container-pad) var(--space-6);
    background: var(--ink-800);
    border-bottom: var(--border-hairline);
    transform-origin: top;
    transform: scaleY(0);
    opacity: 0;
    pointer-events: none;
    transition:
      transform var(--duration-base) var(--ease-out),
      opacity var(--duration-base) var(--ease-out);
  }

  .nav.is-open .nav__links {
    transform: scaleY(1);
    opacity: 1;
    pointer-events: auto;
  }

  .nav__link {
    padding-block: var(--space-2);
    width: 100%;
  }

  .nav__actions .btn {
    display: none;
  }

  .nav.is-open .nav__actions .btn {
    display: inline-flex;
    margin-top: var(--space-2);
  }
}