/* Premium Sticky Header & Navigation */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background-color: rgba(25, 20, 17, 0.7);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  z-index: 900;
  display: flex;
  align-items: center;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.18);
  transition: height 0.4s cubic-bezier(0.16, 1, 0.3, 1),
              background-color 0.4s cubic-bezier(0.16, 1, 0.3, 1),
              backdrop-filter 0.4s cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Luxury visual divider: warm amber glow horizontal gradient reflection */
.site-header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, 
    rgba(255, 255, 255, 0) 0%, 
    rgba(255, 255, 255, 0.08) 20%, 
    rgba(255, 174, 115, 0.12) 50%, 
    rgba(255, 255, 255, 0.08) 80%, 
    rgba(255, 255, 255, 0) 100%
  );
  z-index: 10;
  transition: background 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.site-header.scrolled {
  height: 64px;
  background-color: rgba(25, 20, 17, 0.85);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
}

.site-header.scrolled::after {
  background: linear-gradient(90deg, 
    rgba(255, 255, 255, 0) 0%, 
    rgba(255, 255, 255, 0.12) 20%, 
    rgba(255, 174, 115, 0.18) 50%, 
    rgba(255, 255, 255, 0.12) 80%, 
    rgba(255, 255, 255, 0) 100%
  );
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
}

/* Logo Styles */
.logo-link {
  display: flex;
  align-items: center;
  height: 100%;
  padding-right: var(--spacing-md);
}

.logo-img {
  height: 48px;
  width: 56px;
  display: block;
  object-fit: contain;
  transition: height var(--transition-normal), width var(--transition-normal);
}

.site-header.scrolled .logo-img {
  height: 38px;
  width: 44px;
}

/* Nav Menu */
.nav-menu {
  display: flex;
  gap: var(--spacing-xl);
  list-style: none;
}

.nav-item {
  position: relative;
}

.nav-link {
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
  padding: var(--spacing-sm) 0;
}

.nav-link:hover, .nav-link.active {
  color: var(--text-primary);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--accent-red);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition-normal);
}

.nav-link:hover::after, .nav-link.active::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* Header Actions (Right) */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.action-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--transition-fast), transform var(--transition-fast);
  padding: var(--spacing-xs);
  position: relative;
}

.action-btn:hover {
  color: var(--text-primary);
  transform: scale(1.05);
}

.action-btn svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
}

/* Shopping Cart Badge */
.cart-badge {
  position: absolute;
  top: -4px;
  right: -4px;
  background-color: var(--accent-red);
  color: var(--text-primary);
  font-size: 0.65rem;
  font-weight: 700;
  width: 16px;
  height: 16px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 0 2px var(--bg-primary);
}

.login-btn {
  font-size: 0.75rem !important;
  padding: 0.5rem 1.25rem !important;
}

/* Mobile Nav Toggle */
.mobile-nav-toggle {
  display: none;
}

@media (max-width: 992px) {
  .nav-menu {
    display: none; /* Hide on mobile by default */
  }
  
  .mobile-nav-toggle {
    display: flex;
  }
}

/* Search Modal Panel overlay */
.search-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(25, 20, 17, 0.98);
  z-index: 1500;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  padding: var(--spacing-xl);
}

.search-overlay.open {
  opacity: 1;
  visibility: visible;
}

.search-container {
  width: 100%;
  max-width: 600px;
  position: relative;
}

.search-input {
  width: 100%;
  background: none;
  border: none;
  border-bottom: 2px solid var(--border-color);
  font-family: var(--font-family);
  font-size: 2rem;
  font-weight: 300;
  color: var(--text-primary);
  padding: var(--spacing-sm) 0;
  outline: none;
  transition: border-color var(--transition-fast);
}

.search-input:focus {
  border-color: var(--text-primary);
}

.close-search {
  position: absolute;
  top: var(--spacing-xl);
  right: var(--spacing-xl);
  font-size: 1.5rem;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  transition: color var(--transition-fast);
}

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