/* ===== TOPBAR ===== */
.op-topbar {
  background: #1E293B;
  color: #94A3B8;
  font-size: var(--op-text-xs);
  padding: 0.5rem 0;
}
.op-topbar-inner { display: flex; justify-content: space-between; align-items: center; }
.op-topbar-left { display: flex; gap: 1.5rem; }
.op-topbar-item { color: #94A3B8; display: flex; align-items: center; gap: 0.375rem; }
.op-topbar-item:hover { color: #fff; }
.op-topbar-item svg { opacity: 0.7; }
.op-topbar-right { color: var(--op-accent); font-weight: 600; }

/* ===== MAIN HEADER ===== */
.op-header {
  background: var(--op-white);
  padding: 1rem 0;
  box-shadow: var(--op-shadow-sm);
  position: relative;
  z-index: 100;
  transition: all 0.3s ease;
}
.op-header-sticky {
  position: sticky;
  top: 0;
  box-shadow: var(--op-shadow-md);
}
.op-header-inner {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

/* Logo */
.op-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  flex-shrink: 0;
}
.op-logo-text {
  font-family: var(--op-font-display);
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--op-text);
  letter-spacing: -0.02em;
}
.op-logo-badge {
  background: var(--op-primary);
  color: #fff;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 0.2rem 0.5rem;
  border-radius: var(--op-radius-full);
  letter-spacing: 0.05em;
}

/* Search */
.op-header-search { flex: 1; max-width: 560px; }
.op-search-form {
  display: flex;
  border: 2px solid var(--op-border);
  border-radius: var(--op-radius);
  overflow: hidden;
  transition: border-color var(--op-transition);
}
.op-search-form:focus-within { border-color: var(--op-primary); }
.op-search-cat {
  border: none;
  background: var(--op-bg);
  padding: 0.625rem 0.75rem;
  font-size: var(--op-text-sm);
  color: var(--op-text-secondary);
  border-right: 1px solid var(--op-border);
  cursor: pointer;
  min-width: 140px;
}
.op-search-input {
  flex: 1;
  border: none;
  padding: 0.625rem 1rem;
  font-size: var(--op-text-sm);
  outline: none;
  min-width: 0;
}
.op-search-btn {
  background: var(--op-primary);
  color: #fff;
  border: none;
  padding: 0.625rem 1rem;
  cursor: pointer;
  transition: background var(--op-transition);
  display: flex;
  align-items: center;
}
.op-search-btn:hover { background: var(--op-primary-dark); }

/* Header Actions */
.op-header-actions { display: flex; align-items: center; gap: 1rem; flex-shrink: 0; }
.op-header-action {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  color: var(--op-text);
  font-size: var(--op-text-sm);
  text-decoration: none;
}
.op-header-action:hover { color: var(--op-primary); }
.op-header-action-label { font-weight: 500; }

/* Cart */
.op-header-cart {
  background: var(--op-primary);
  color: #fff !important;
  padding: 0.5rem 1rem;
  border-radius: var(--op-radius);
  gap: 0.5rem;
}
.op-header-cart:hover { background: var(--op-primary-dark); color: #fff; }
.op-header-cart svg { stroke: #fff; }
.op-cart-count {
  background: var(--op-accent);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  min-width: 20px;
  height: 20px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.op-cart-total { font-weight: 600; font-size: var(--op-text-sm); }

/* ===== NAVIGATION ===== */
.op-nav {
  background: var(--op-white);
  border-top: 1px solid var(--op-border-light);
  border-bottom: 1px solid var(--op-border);
}
.op-nav-list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0;
  margin: 0;
  padding: 0;
}
.op-nav-item { position: relative; }
.op-nav-link {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.875rem 1rem;
  color: var(--op-text);
  font-size: var(--op-text-sm);
  font-weight: 500;
  text-decoration: none;
  transition: all var(--op-transition);
}
.op-nav-link:hover { color: var(--op-primary); background: var(--op-bg); }
.op-nav-icon { opacity: 0.5; }
.op-nav-highlight .op-nav-link {
  background: var(--op-danger);
  color: #fff;
  border-radius: var(--op-radius);
  margin: 0.375rem 0;
}
.op-nav-highlight .op-nav-link:hover { background: #DC2626; }

/* Mega Dropdown */
.op-mega-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--op-white);
  border: 1px solid var(--op-border);
  border-radius: 0 0 var(--op-radius) var(--op-radius);
  box-shadow: var(--op-shadow-lg);
  min-width: 320px;
  padding: 1rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(4px);
  transition: all 0.15s ease;
  z-index: 200;
}
.op-nav-mega:hover .op-mega-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.op-mega-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.25rem;
}
.op-mega-link {
  display: block;
  padding: 0.5rem 0.75rem;
  color: var(--op-text);
  font-size: var(--op-text-sm);
  border-radius: var(--op-radius);
  text-decoration: none;
  transition: background var(--op-transition);
}
.op-mega-link:hover { background: var(--op-bg); color: var(--op-primary); }
.op-mega-count { color: var(--op-text-muted); font-size: var(--op-text-xs); }

/* ===== STICKY HEADER ===== */
.op-header.is-sticky {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  box-shadow: var(--op-shadow-md);
  animation: slideDown 0.3s ease;
}
@keyframes slideDown {
  from { transform: translateY(-100%); }
  to { transform: translateY(0); }
}
.op-header.is-sticky + .op-nav { display: none; }
body.has-sticky-header { padding-top: 72px; }

/* ===== MOBILE MENU TOGGLE ===== */
.op-mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}
.op-mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--op-text);
  transition: all var(--op-transition);
}

/* Mobile Menu Overlay */
.op-mobile-menu {
  position: fixed;
  top: 0;
  right: -100%;
  width: 320px;
  max-width: 85vw;
  height: 100vh;
  background: var(--op-white);
  z-index: 2000;
  transition: right 0.3s ease;
  overflow-y: auto;
  box-shadow: -4px 0 20px rgba(0,0,0,0.15);
}
.op-mobile-menu.is-open { right: 0; }
.op-mobile-menu-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--op-border);
}
.op-mobile-close {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--op-text);
  padding: 0.25rem;
}
.op-mobile-menu-body { padding: 1rem 0; }
.op-mobile-link {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.875rem 1.5rem;
  color: var(--op-text);
  font-weight: 500;
  text-decoration: none;
  transition: background var(--op-transition);
}
.op-mobile-link:hover { background: var(--op-bg); color: var(--op-primary); }
.op-mobile-count { color: var(--op-text-muted); font-size: var(--op-text-sm); }
.op-mobile-divider { border: none; border-top: 1px solid var(--op-border); margin: 0.5rem 0; }

/* Mobile Backdrop */
.op-mobile-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  z-index: 1999;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}
.op-mobile-backdrop.is-visible { opacity: 1; visibility: visible; }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .op-topbar-left { gap: 1rem; }
  .op-search-cat { display: none; }
}

@media (max-width: 768px) {
  .op-topbar { display: none; }
  .op-header-action-label { display: none; }
  .op-cart-total { display: none; }
  .op-header-search { max-width: none; }
  .op-mobile-toggle { display: flex; }
  .op-nav { display: none; }
}

@media (max-width: 480px) {
  .op-header-inner { gap: 0.75rem; }
  .op-logo-text { font-size: 1rem; }
  .op-header-search { display: none; }
}