.site-header {
  background: var(--primary);
  color: var(--white);
  height: var(--header-height);
  display: flex;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow);
}

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

.header-left {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-shrink: 0;
}

.logo {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.5px;
  flex-shrink: 0;
  white-space: nowrap;
}

.logo span {
  color: var(--accent);
}

.menu-toggle {
  background: none;
  border: none;
  cursor: pointer;
  display: none;
  flex-direction: column;
  gap: 4px;
}

.menu-toggle span {
  display: block;
  width: 25px;
  height: 2px;
  background: var(--white);
}

.catalog-btn {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--white);
  padding: 8px 16px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-weight: 500;
  white-space: nowrap;
  flex-shrink: 0;
}

.catalog-btn:hover {
  background: rgba(255, 255, 255, 0.2);
}

.header-center {
  flex: 1;
  max-width: 600px;
  margin: 0 40px;
  min-width: 0;
}

.search-form {
  display: flex;
  width: 100%;
  background: var(--white);
  border-radius: 8px;
  overflow: hidden;
}

.search-form input {
  flex: 1;
  border: none;
  padding: 10px 16px;
  outline: none;
  font-size: 16px;
  min-width: 0;
}

.search-btn {
  background: var(--accent);
  color: var(--white);
  border: none;
  padding: 0 24px;
  cursor: pointer;
  font-weight: 600;
  white-space: nowrap;
  flex-shrink: 0;
}

.search-btn:hover {
  background: var(--accent-hover);
}

.header-right {
  flex-shrink: 0;
}

.header-right .user-menu {
  display: flex;
  align-items: center;
  gap: 24px;
}

.icon-link,
.cart-link {
  color: var(--white);
  display: flex;
  align-items: center;
  position: relative;
}

.icon-link:hover,
.cart-link:hover {
  color: var(--accent);
}

.cart-count {
  position: absolute;
  top: -8px;
  right: -10px;
  background: var(--accent);
  color: var(--white);
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 10px;
  font-weight: 700;
}

/* ===== CATALOG OVERLAY ===== */
.catalog-overlay {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.6);
  z-index: 998;
}
.catalog-overlay.show { display: block; }

/* ===== CATALOG DROPDOWN (MEGA MENU) ===== */

.catalog-wrapper {
  position: relative;
}

.catalog-dropdown {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: 8px;
  background: #1e293b;
  border-radius: 16px;
  min-width: 340px;
  max-width: 400px;
  max-height: calc(100vh - 100px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2), 0 0 0 1px rgba(255,255,255,0.06);
  z-index: 9999;
  overflow: hidden;
  flex-direction: column;
}

.catalog-dropdown.show {
  display: flex;
  animation: catalogSlideIn 0.25s ease;
}

@keyframes catalogSlideIn {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Dropdown Header */
.catalog-dropdown-header {
  display: none;
  padding: 16px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  align-items: center;
  justify-content: space-between;
}

.catalog-dropdown-header h3 {
  color: white;
  font-size: 16px;
  font-weight: 700;
  margin: 0;
}

.catalog-close-btn {
  background: rgba(255,255,255,0.1);
  border: none;
  color: #94a3b8;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  font-size: 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: 0.2s;
}

.catalog-close-btn:hover {
  background: rgba(255,255,255,0.2);
  color: white;
}

/* Dropdown Body */
.catalog-dropdown-body {
  overflow-y: auto;
  padding: 8px 0;
  flex: 1;
}

.catalog-dropdown-body::-webkit-scrollbar { width: 4px; }
.catalog-dropdown-body::-webkit-scrollbar-track { background: transparent; }
.catalog-dropdown-body::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.15); border-radius: 4px; }

/* Category Group */
.catalog-group {
  border-bottom: 1px solid rgba(255,255,255,0.04);
}

.catalog-group:last-child {
  border-bottom: none;
}

.catalog-group[data-level="0"] > .catalog-group-title {
  /* Top-level only - slightly more prominent */
}

.catalog-group-title {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  color: #e2e8f0;
  text-decoration: none;
  font-size: 15px;
  font-weight: 600;
  transition: all 0.2s;
  cursor: pointer;
}

.catalog-group-title:hover {
  background: rgba(99, 102, 241, 0.12);
  color: white;
}

.catalog-group-title:hover .catalog-arrow {
  color: var(--accent);
}

.catalog-item-link {
  color: inherit;
  text-decoration: none;
  flex: 1;
  transition: color 0.15s;
}

.catalog-item-link:hover {
  color: var(--accent);
  text-decoration: underline;
}

.catalog-group-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  object-fit: contain;
  background: rgba(255,255,255,0.06);
  padding: 4px;
  flex-shrink: 0;
}

.catalog-group-letter {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), #818cf8);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  flex-shrink: 0;
}

.catalog-arrow {
  margin-left: auto;
  color: #475569;
  transition: all 0.25s ease;
  flex-shrink: 0;
}

.catalog-arrow.open {
  transform: rotate(90deg);
  color: var(--accent);
}

/* Sub Items - nested levels */
.catalog-sub-list {
  padding: 0;
  display: flex;
  flex-direction: column;
}

/* Nested group within sub-list */
.catalog-sub-list .catalog-group {
  border-bottom: none;
}

.catalog-sub-list .catalog-group-title {
  font-size: 13px;
  font-weight: 500;
  padding-top: 8px;
  padding-bottom: 8px;
  color: #94a3b8;
}

.catalog-sub-list .catalog-group-title:hover {
  color: white;
  background: rgba(99, 102, 241, 0.1);
}

/* All Products Link */
.catalog-all-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 20px;
  color: var(--accent);
  text-decoration: none;
  font-size: 14px;
  font-weight: 700;
  border-top: 1px solid rgba(255,255,255,0.08);
  transition: all 0.2s;
}

.catalog-all-link:hover {
  background: rgba(99, 102, 241, 0.08);
  color: #818cf8;
}

/* ===== TABLET RESPONSIVE (769px - 1024px) ===== */
@media (max-width: 1024px) {
  .header-center {
    margin: 0 15px;
    max-width: 400px;
  }

  .header-right .user-menu {
    gap: 12px;
  }

  .catalog-btn {
    padding: 8px 10px;
  }

  .search-btn {
    padding: 0 14px;
    font-size: 13px;
  }
}

/* ===== MOBILE RESPONSIVE (<=768px) ===== */
@media (max-width: 768px) {
  .site-header {
    height: auto;
    padding: 10px 0;
  }

  .header-inner {
    display: grid;
    grid-template-areas:
      "left logo right"
      "search search search";
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 10px;
    padding: 5px 20px 5px 15px;
  }

  .logo {
    grid-area: logo;
    text-align: center;
    margin: 0;
    font-size: 22px;
  }

  .header-left {
    grid-area: left;
    display: flex;
    align-items: center;
    gap: 10px;
    justify-self: start;
  }

  .header-right {
    grid-area: right;
    display: flex;
    align-items: center;
    justify-self: end;
  }

  .header-right .user-menu {
    gap: 12px;
  }

  .header-center {
    grid-area: search;
    width: 100%;
    margin: 0;
    max-width: 100%;
  }

  .usr-name,
  .my-orders-text,
  .catalog-text {
    display: none;
  }

  .catalog-btn {
    padding: 8px;
    background: transparent;
    border: none;
  }

  .catalog-btn svg {
    width: 26px;
    height: 26px;
  }

  .search-btn {
    padding: 0 16px;
    font-size: 14px;
  }

  .search-form input {
    padding: 10px 12px;
    font-size: 14px;
  }

  /* Catalog mobile - fullscreen */
  .catalog-dropdown {
    position: fixed;
    top: 0;
    left: -100%;
    right: auto;
    bottom: 0;
    margin-top: 0;
    width: 85vw;
    max-width: 360px;
    min-width: unset;
    max-height: 100vh;
    border-radius: 0 16px 16px 0;
    transition: left 0.3s ease;
    z-index: 10001;
  }

  .catalog-dropdown.show {
    left: 0;
    animation: none;
  }

  .catalog-dropdown-header {
    display: flex;
  }

  .catalog-overlay {
    z-index: 10000;
  }

  .catalog-group-title {
    padding: 14px 20px;
  }

  .catalog-sub-list {
    padding-left: 0;
  }

  .catalog-sub-list .catalog-group-title {
    font-size: 14px;
    padding: 10px 20px;
  }
}

/* ===== SMALL MOBILE (<=480px) ===== */
@media (max-width: 480px) {
  .header-inner {
    gap: 8px;
    padding: 5px 16px 5px 10px;
  }

  .logo {
    font-size: 20px;
  }

  .header-right .user-menu {
    gap: 10px;
  }

  .search-btn {
    padding: 0 12px;
    font-size: 13px;
  }

  .search-form input {
    padding: 9px 10px;
    font-size: 13px;
  }
}

/* ===== EXTRA SMALL MOBILE 360px, 375px, 390px ===== */
@media (max-width: 400px) {
  .header-inner {
    gap: 6px;
    padding: 4px 14px 4px 8px;
  }

  .logo {
    font-size: 18px;
  }

  .catalog-btn {
    padding: 6px;
  }

  .catalog-btn svg {
    width: 24px;
    height: 24px;
  }

  .header-right .user-menu {
    gap: 8px;
  }

  .header-right .user-menu a[href="/cabinet.php"],
  .header-right .user-menu a[href="/admin/index.php"],
  .header-right .user-menu a[href="/login.php"] {
    padding: 5px 8px !important;
    font-size: 12px !important;
  }

  .header-right .user-menu svg {
    width: 16px;
    height: 16px;
  }

  .cart-link svg {
    width: 22px;
    height: 22px;
  }

  .search-btn {
    padding: 0 10px;
    font-size: 12px;
  }

  .search-form input {
    padding: 8px;
    font-size: 13px;
  }
}