/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: rgba(13,13,13,.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border-light);
  transition: background var(--transition-base);
}
.site-header.scrolled {
  background: rgba(13,13,13,.98);
  box-shadow: 0 2px 20px rgba(0,0,0,.5);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: var(--space-6);
}

/* Logo */
.site-logo a {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.site-logo img {
  height: 36px;
  width: auto;
}
.site-logo__text {
  font-family: var(--font-heading);
  font-weight: var(--fw-black);
  font-size: var(--fs-xl);
  color: var(--color-white);
  letter-spacing: -.02em;
}

/* Primary Nav */
.primary-nav { display: flex; align-items: center; gap: var(--space-1); }
.primary-nav .nav-item { position: relative; }
.primary-nav .nav-link {
  display: block;
  padding: var(--space-2) var(--space-4);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--color-text-light);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  white-space: nowrap;
}
.primary-nav .nav-link:hover,
.primary-nav .nav-link.active {
  color: var(--color-white);
  background: var(--color-surface);
}

/* State selector pill */
.state-selector {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.state-selector:hover { border-color: var(--color-primary); color: var(--color-text); }
.state-selector__icon { font-size: 14px; }

/* Header actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.header-actions .cart-btn {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  border-radius: var(--radius-full);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.header-actions .cart-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.cart-count {
  position: absolute;
  top: -4px; right: -4px;
  min-width: 18px; height: 18px;
  padding: 0 4px;
  background: var(--color-primary);
  color: #000;
  font-size: 10px;
  font-weight: var(--fw-bold);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

/* Hamburger */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px; height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
}
.menu-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--color-white);
  border-radius: 2px;
  transition: all var(--transition-base);
  transform-origin: left;
}
.menu-toggle.open span:nth-child(1) { transform: rotate(45deg) translateY(-1px); }
.menu-toggle.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.menu-toggle.open span:nth-child(3) { transform: rotate(-45deg) translateY(1px); }

/* Mobile Nav Drawer */
.mobile-nav {
  position: fixed;
  inset: 0 0 0 auto;
  width: min(360px, 90vw);
  background: var(--color-bg-alt);
  border-left: 1px solid var(--color-border);
  z-index: var(--z-modal);
  transform: translateX(100%);
  transition: transform var(--transition-slow);
  display: flex;
  flex-direction: column;
  padding: var(--space-6);
  overflow-y: auto;
}
.mobile-nav.open { transform: translateX(0); }
.mobile-nav__overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.7);
  z-index: calc(var(--z-modal) - 1);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-slow);
}
.mobile-nav__overlay.open { opacity: 1; pointer-events: all; }

.mobile-nav__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-8);
}
.mobile-nav__close {
  background: none; border: none;
  color: var(--color-text-muted);
  font-size: 24px;
  cursor: pointer;
  transition: color var(--transition-fast);
}
.mobile-nav__close:hover { color: var(--color-white); }

.mobile-nav .nav-link {
  display: block;
  padding: var(--space-4) 0;
  font-size: var(--fs-lg);
  font-weight: var(--fw-semibold);
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
  transition: color var(--transition-fast);
}
.mobile-nav .nav-link:hover { color: var(--color-primary); }

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
}

.footer-newsletter {
  padding-block: var(--space-16);
  text-align: center;
  border-bottom: 1px solid var(--color-border);
}
.footer-newsletter__title {
  font-size: clamp(var(--fs-xl), 2.5vw, var(--fs-3xl));
  font-weight: var(--fw-black);
  margin-bottom: var(--space-6);
}
.footer-newsletter__form {
  display: flex;
  gap: var(--space-3);
  max-width: 480px;
  margin-inline: auto;
}
.footer-newsletter__input {
  flex: 1;
  padding: var(--space-3) var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-white);
  font-size: var(--fs-sm);
  transition: border-color var(--transition-fast);
}
.footer-newsletter__input::placeholder { color: var(--color-text-muted); }
.footer-newsletter__input:focus { outline: none; border-color: var(--color-primary); }

.footer-social {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  margin-top: var(--space-6);
}
.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  border-radius: var(--radius-full);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 18px;
  transition: all var(--transition-fast);
}
.social-link:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #000;
}
.social-link svg { width: 18px; height: 18px; fill: currentColor; }

.footer-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-8);
  padding-block: var(--space-16);
}
.footer-col__title {
  font-family: var(--font-heading);
  font-size: var(--fs-sm);
  font-weight: var(--fw-bold);
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--color-white);
  margin-bottom: var(--space-5);
}
.footer-col__links { display: flex; flex-direction: column; gap: var(--space-3); }
.footer-col__links a {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}
.footer-col__links a:hover { color: var(--color-primary); }

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}
.footer-bottom__copy {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
}
.footer-logo img { height: 48px; width: auto; }

/* FDA Disclaimer */
.footer-disclaimer {
  font-size: 11px;
  color: var(--color-text-muted);
  padding-block: var(--space-6);
  border-top: 1px solid var(--color-border);
  line-height: var(--lh-loose);
  opacity: 0.6;
}

/* ============================================================
   PAGE LAYOUTS
   ============================================================ */
.page-hero {
  padding-block: var(--space-24) var(--space-16);
  text-align: center;
}
.page-hero__title {
  font-size: clamp(var(--fs-3xl), 5vw, var(--fs-5xl));
  font-weight: var(--fw-black);
  margin-bottom: var(--space-4);
}
.page-hero__subtitle {
  font-size: var(--fs-lg);
  color: var(--color-text-muted);
  max-width: 600px;
  margin-inline: auto;
}

.with-sidebar {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--space-10);
  align-items: start;
}

.sidebar { position: sticky; top: 80px; }

/* ============================================================
   BREADCRUMBS
   ============================================================ */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  padding-block: var(--space-4);
}
.breadcrumbs a { transition: color var(--transition-fast); }
.breadcrumbs a:hover { color: var(--color-primary); }
.breadcrumbs__sep { opacity: .4; }

/* ============================================================
   PAGINATION
   ============================================================ */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  margin-top: var(--space-12);
}
.page-numbers {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  border-radius: var(--radius-md);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  transition: all var(--transition-fast);
}
.page-numbers:hover,
.page-numbers.current {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #000;
}