/* ==========================================================================
   HEADER & NAVIGATION - BARBERÍA IMPERIO
   Sticky header, dynamic overflow calculation & drawer mobile menu
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-sticky);
  background-color: rgba(13, 15, 18, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-subtle);
  transition: background-color var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.site-header.is-scrolled {
  background-color: rgba(13, 15, 18, 0.98);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.6);
  border-bottom-color: var(--color-border-gold);
}

.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
  gap: 1.5rem;
  position: relative;
}

/* --- LOGO --- */
.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  flex-shrink: 0;
  z-index: calc(var(--z-drawer) + 10);
}

.logo-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--color-gold) 0%, var(--color-gold-dark) 100%);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(212, 175, 55, 0.3);
}

.logo-icon svg {
  width: 26px;
  height: 26px;
  fill: #0d0f12;
}

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

.logo-title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--color-text-main);
  line-height: 1;
  text-transform: uppercase;
}

.logo-title span {
  color: var(--color-gold);
}

.logo-subtitle {
  font-size: 0.65rem;
  letter-spacing: 3px;
  color: var(--color-text-muted);
  text-transform: uppercase;
  font-weight: 600;
}

/* --- CONTENEDOR DE NAVEGACIÓN --- */
.nav-container {
  display: flex;
  align-items: center;
  gap: 2rem;
  flex-grow: 1;
  justify-content: center;
  min-width: 0; /* Permite medir scrollWidth adecuadamente */
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2.25rem;
  margin: 0;
  padding: 0;
  white-space: nowrap;
}

.nav-link {
  position: relative;
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
  padding: 0.5rem 0;
}

.nav-link:hover {
  color: var(--color-gold-light);
}

.nav-link.active {
  color: var(--color-gold);
  font-weight: 700;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-gold), var(--color-gold-light));
  border-radius: 2px;
  box-shadow: 0 0 8px var(--color-gold);
}

/* --- BOTÓN CTA HEADER --- */
.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-shrink: 0;
}

.header-cta-btn {
  font-size: 0.95rem;
  padding: 0.65rem 1.35rem;
}

/* --- BOTÓN HAMBURGUESA --- */
.hamburger-btn {
  display: none; /* Se activa mediante JS cuando es necesario */
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-sm);
  color: var(--color-text-main);
  z-index: var(--z-hamburger);
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.hamburger-btn:hover {
  background: rgba(212, 175, 55, 0.15);
  border-color: var(--color-border-gold);
  color: var(--color-gold);
}

.hamburger-icon {
  width: 24px;
  height: 24px;
  fill: currentColor;
}

.hamburger-icon .icon-close {
  display: none;
}

.hamburger-btn.is-active .icon-open {
  display: none;
}

.hamburger-btn.is-active .icon-close {
  display: block;
}

/* --- MODO HAMBURGUESA / MÓVIL DESPLEGABLE --- */
.site-header.is-collapsed .hamburger-btn {
  display: flex;
}

.site-header.is-collapsed .nav-container {
  position: fixed;
  top: 0;
  right: 0;
  width: 320px;
  max-width: 85vw;
  height: 100vh;
  background: var(--color-bg-secondary);
  border-left: 1px solid var(--color-border-gold);
  box-shadow: -10px 0 30px rgba(0, 0, 0, 0.8);
  flex-direction: column;
  justify-content: flex-start;
  align-items: stretch;
  padding: 6rem 2rem 2.5rem;
  z-index: var(--z-drawer);
  transform: translateX(100%);
  transition: transform var(--transition-smooth);
  overflow-y: auto;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}

.site-header.is-collapsed .nav-container.is-open {
  transform: translateX(0);
}

.site-header.is-collapsed .nav-menu {
  flex-direction: column;
  align-items: stretch;
  gap: 0;
  width: 100%;
}

.site-header.is-collapsed .nav-link {
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-border-subtle);
  font-size: 1.2rem;
  display: block;
}

.site-header.is-collapsed .nav-link.active::after {
  display: none;
}

.site-header.is-collapsed .nav-link.active {
  padding-left: 0.75rem;
  border-left: 3px solid var(--color-gold);
}

.drawer-cta {
  display: none;
  margin-top: 2rem;
  width: 100%;
}

.site-header.is-collapsed .drawer-cta {
  display: flex;
}

/* --- OVERLAY BACKDROP --- */
.nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: var(--color-bg-overlay);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: var(--z-overlay);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.nav-overlay.is-open {
  opacity: 1;
  pointer-events: auto;
}

/* --- ELEVACIÓN DE Z-INDEX & INTERACTIVIDAD CUANDO EL MENÚ ESTÁ ABIERTO --- */
body.menu-open .site-header {
  z-index: var(--z-drawer); /* 200: Eleva el header sobre el overlay (190) para evitar desenfoque/blur en el menú */
}

body.menu-open .site-header-inner {
  pointer-events: none; /* Los clics en espacios vacíos atraviesan hacia el overlay de cierre */
}

body.menu-open .logo,
body.menu-open .hamburger-btn,
body.menu-open .nav-container {
  pointer-events: auto; /* Mantiene 100% interactivos los links, el logo y el botón hamburguesa */
}

/* Ajuste responsive extremo para pantallas muy pequeñas */
@media (max-width: 480px) {
  .header-actions .header-cta-btn {
    display: none;
  }
}