/* ============================================================
   nav.css — Navegación principal
   ============================================================ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 500;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  padding-inline: var(--section-pad-x);
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

/* Gradiente de fondo que se desvanece hacia abajo */
.nav::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(23, 20, 21, 0.85) 0%,
    transparent 100%
  );
  pointer-events: none;
  z-index: -1;
  transition: opacity var(--transition-base);
}

/* Cuando el usuario hace scroll, el nav se vuelve sólido */
.nav.is-scrolled {
  background: rgba(38, 34, 35, 0.97);
  box-shadow: 0 1px 0 rgba(191, 15, 30, 0.35);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.nav.is-scrolled::after {
  opacity: 0;
}

/* ── Logo ─────────────────────────────────────────────────── */
.nav__logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex-shrink: 0;
}

.nav__logo-img {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--color-white);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.35);
  transition: transform var(--transition-base);
}

.nav__logo:hover .nav__logo-img {
  transform: rotate(-8deg) scale(1.05);
}

.nav__logo-text {
  display: flex;
  flex-direction: column;
}

.nav__logo-name {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-white);
  line-height: 1;
}

.nav__logo-tagline {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-amber);
  margin-top: 4px;
}

/* ── Links centrales ──────────────────────────────────────── */
.nav__links {
  display: flex;
  gap: var(--space-xl);
  list-style: none;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.nav__links a {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.20em;
  text-transform: uppercase;
  color: var(--color-snow);
  opacity: 0.72;
  text-decoration: none;
  position: relative;
  padding-bottom: 4px;
  white-space: nowrap;
  transition: opacity var(--transition-fast);
}

/* Línea animada debajo del link */
.nav__links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-red);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.35s var(--ease-smooth);
}

.nav__links a:hover,
.nav__links a.is-active {
  opacity: 1;
}

.nav__links a:hover::after,
.nav__links a.is-active::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* Etiqueta de los links en vista previa (Mezcla / Pago) */
.nav__preview {
  display: inline-block;
  margin-left: 6px;
  padding: 1px 6px;
  font-family: var(--font-mono);
  font-size: 0.5rem;
  letter-spacing: 0.08em;
  vertical-align: middle;
  color: var(--color-ink);
  background: var(--color-amber);
  border-radius: var(--radius-full);
}

/* Con la vista previa hay 7 links: compactar en pantallas medianas */
@media (max-width: 1440px) {
  .nav--preview .nav__links {
    gap: var(--space-lg);
  }

  .nav--preview .nav__logo-tagline {
    display: none;
  }
}

/* ── Acciones (derecha) ───────────────────────────────────── */
.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

/* Botón "Visítanos" → 8va Avenida */
.nav__cta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  background: var(--color-red);
  padding: 10px 18px;
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-white);
  text-decoration: none;
  border-radius: var(--radius-full);
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.nav__cta:hover {
  background: var(--color-crimson);
  transform: translateY(-1px);
}

.nav__cta svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
}

/* ── Menú hamburguesa (mobile) ────────────────────────────── */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 10px 6px;
}

.nav__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-snow);
  transition: transform var(--transition-base), opacity var(--transition-fast);
  transform-origin: center;
}

/* Estado abierto del hamburguesa */
.nav__hamburger.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__hamburger.is-open span:nth-child(2) {
  opacity: 0;
}

.nav__hamburger.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── Menú móvil desplegable ───────────────────────────────── */
.nav__mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  max-height: calc(100vh - var(--nav-height));
  overflow-y: auto;
  background: rgba(38, 34, 35, 0.98);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-top: 2px solid var(--color-red);
  padding: var(--space-lg) var(--section-pad-x) var(--space-xl);
  z-index: 499;
  flex-direction: column;
  gap: var(--space-xs);
  transform: translateY(-10px);
  opacity: 0;
  visibility: hidden;
  transition: transform var(--transition-base), opacity var(--transition-base), visibility var(--transition-base);
}

.nav__mobile-menu.is-open {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.nav__mobile-menu a {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  font-weight: 400;
  color: var(--color-snow);
  text-decoration: none;
  padding-block: var(--space-sm);
  border-bottom: 1px solid var(--line-dark);
  transition: color var(--transition-fast), padding-left var(--transition-base);
}

.nav__mobile-menu a:hover,
.nav__mobile-menu a.is-active {
  color: var(--color-red);
  padding-left: var(--space-md);
}

.nav__mobile-menu a.is-active {
  color: var(--color-amber);
}

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 1100px) {
  .nav__links {
    gap: var(--space-lg);
  }
}

@media (max-width: 1024px) {
  .nav__links {
    display: none;
  }

  .nav__hamburger {
    display: flex;
  }

  .nav__mobile-menu {
    display: flex;
  }
}

@media (max-width: 640px) {
  :root {
    --nav-height: 68px;
  }

  .nav__logo-img {
    width: 40px;
    height: 40px;
  }

  .nav__logo-tagline {
    display: none;
  }

  /* En móvil el CTA queda solo como ícono */
  .nav__cta {
    padding: 10px;
  }

  .nav__cta span {
    display: none;
  }
}