/* ==============================================
   Header — Sticky nav, mobile drawer
   ============================================== */

.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--header-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: background-color var(--transition-base), box-shadow var(--transition-base);
  border-bottom: 1px solid transparent;
}

.header.scrolled {
  border-bottom-color: var(--border);
  box-shadow: 0 2px 20px var(--shadow);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.5px;
  white-space: nowrap;
}
.logo-img {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}
.logo-text {
  color: var(--accent);
  font-size: var(--font-size-lg);
  font-weight: 700;
}
@media (max-width: 480px) {
  .logo-text {
    font-size: 14px;
  }
  .logo-img {
    width: 32px;
    height: 32px;
  }
}

/* Desktop Nav */
.nav-desktop {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}
.nav-desktop a {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  font-weight: 500;
  letter-spacing: 0.3px;
  text-transform: uppercase;
  padding: var(--space-xs) 0;
  position: relative;
  transition: color var(--transition-fast);
}
.nav-desktop a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--transition-base);
}
.nav-desktop a:hover,
.nav-desktop a.active {
  color: var(--accent);
}
.nav-desktop a:hover::after,
.nav-desktop a.active::after {
  width: 100%;
}

/* Header actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.header-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  font-size: 1.15rem;
  transition: background-color var(--transition-fast);
  position: relative;
  color: var(--text-primary);
}
.header-icon:hover {
  background-color: var(--bg-elevated);
}

.cart-count {
  position: absolute;
  top: 2px;
  right: 2px;
  width: 16px;
  height: 16px;
  background: var(--accent);
  color: var(--bg-primary);
  font-size: 10px;
  font-weight: 700;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  cursor: pointer;
  padding: 6px;
}
.hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-base);
}
.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.hamburger.active span:nth-child(2) {
  opacity: 0;
}
.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile drawer */
.nav-mobile {
  position: fixed;
  top: 0;
  left: -300px;
  width: 300px;
  height: 100vh;
  background: var(--bg-secondary);
  z-index: 1001;
  transition: left var(--transition-base);
  padding: var(--space-2xl) var(--space-lg);
  overflow-y: auto;
}
.nav-mobile.open {
  left: 0;
}
.nav-mobile-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-2xl);
}
.nav-mobile-close {
  font-size: 1.5rem;
  color: var(--text-primary);
  cursor: pointer;
}
.nav-mobile a {
  display: block;
  padding: var(--space-md) 0;
  color: var(--text-primary);
  font-size: var(--font-size-lg);
  font-weight: 500;
  border-bottom: 1px solid var(--border);
  transition: color var(--transition-fast);
}
.nav-mobile a:hover,
.nav-mobile a.active {
  color: var(--accent);
}

@media (max-width: 1024px) {
  .nav-desktop { display: none; }
  .hamburger { display: flex; }
}