/**
 * Header — marca con logo ARTECHILE SPA
 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: rgba(5, 5, 5, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-text);
  text-decoration: none;
}

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

.brand-logo {
  height: 48px;
  width: auto;
  display: block;
}

.brand-text {
  font-family: var(--font-main);
  font-weight: 300;
  font-size: 0.95rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.nav-desktop {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.nav-desktop a {
  color: var(--color-text-muted);
  font-weight: 500;
  font-size: 0.88rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  position: relative;
}

.nav-desktop a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  background: var(--gradient-brand);
  transition: width var(--transition);
}

.nav-desktop a:hover,
.nav-desktop a.active {
  color: var(--color-text);
}

.nav-desktop a:hover::after,
.nav-desktop a.active::after {
  width: 100%;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.cart-link {
  position: relative;
  color: var(--color-text);
  font-weight: 500;
  font-size: 0.88rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.cart-badge {
  position: absolute;
  top: -8px;
  right: -12px;
  min-width: 18px;
  height: 18px;
  border-radius: 999px;
  background: var(--color-secondary);
  color: #111;
  font-size: 0.7rem;
  display: grid;
  place-items: center;
  padding: 0 4px;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--color-border);
  background: transparent;
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-text);
  transition: transform var(--transition), opacity var(--transition);
}

.nav-mobile {
  display: none;
  flex-direction: column;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.nav-mobile.open {
  display: flex;
  animation: fadeUp 0.3s ease;
}

.nav-mobile a {
  color: var(--color-text);
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

@media (max-width: 900px) {
  .nav-desktop,
  .header-actions .hide-mobile {
    display: none;
  }

  .brand-text {
    display: none;
  }

  .nav-toggle {
    display: inline-flex;
  }
}