/* assets/css/header.css - Header, Search, Dropdowns & Filter Bar */

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(11, 13, 20, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
}

/* Top Navigation Row */
.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 20px;
  position: relative;
  z-index: 50;
}

/* Brand Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: #fff;
  user-select: none;
}

.logo-badge {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  font-size: 1.1rem;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  box-shadow: 0 0 15px var(--primary-glow);
  font-weight: 900;
}

.logo-text {
  background: linear-gradient(to right, #ffffff, #cbd5e1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-text span {
  background: linear-gradient(to right, #a855f7, #06b6d4);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.search-box-wrapper {
  position: relative;
  width: 320px;
}

.search-input-group {
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  padding: 6px 16px;
  transition: all var(--transition-fast);
}

.search-input-group:focus-within {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--primary);
  box-shadow: 0 0 15px var(--primary-glow);
}

.search-input-group input {
  width: 100%;
  color: var(--text-main);
  font-size: 0.9rem;
  padding-left: 8px;
}

.search-input-group input::placeholder {
  color: var(--text-dim);
}

.search-icon {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Search Live Results Preview Popup */
.search-results-popup {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  width: 100%;
  background: #141926;
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: var(--radius-md);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.75), 0 0 15px rgba(139, 92, 246, 0.15);
  overflow: hidden;
  display: none;
  z-index: 9999;
}

.search-results-popup.active {
  display: block;
  animation: fadeInDown 0.2s ease;
}

.search-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  transition: background var(--transition-fast);
}

.search-item:hover {
  background: rgba(139, 92, 246, 0.12);
}

.search-thumb {
  width: 42px;
  height: 56px;
  border-radius: 4px;
  object-fit: cover;
}

.search-item-info h4 {
  font-size: 0.88rem;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 210px;
}

.search-item-info p {
  font-size: 0.75rem;
  color: var(--secondary);
}

/* User Info Dropdown ("Thông Tin") */
.user-menu-dropdown {
  position: relative;
  z-index: 1005;
  flex-shrink: 0;
}

.user-menu-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-color);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  color: var(--text-main);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.user-menu-btn .fa-chevron-down {
  transition: transform 0.25s ease;
}

.user-menu-btn:hover,
.user-menu-dropdown:hover .user-menu-btn,
.user-menu-dropdown.active .user-menu-btn {
  background: rgba(139, 92, 246, 0.18);
  border-color: var(--primary);
  color: #fff;
  box-shadow: 0 0 12px var(--primary-glow);
}

.user-menu-dropdown:hover .user-menu-btn .fa-chevron-down,
.user-menu-dropdown.active .user-menu-btn .fa-chevron-down {
  transform: rotate(180deg);
}

.avatar-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.dropdown-menu-list {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 220px;
  max-width: calc(100vw - 20px);
  background: #141926;
  border: 1px solid rgba(139, 92, 246, 0.35);
  border-radius: var(--radius-md);
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.85), 0 0 25px rgba(139, 92, 246, 0.25);
  padding: 8px 0;
  display: none;
  z-index: 10000;
}

/* Cầu nối tàng hình giúp rê chuột không bị mất hover */
.dropdown-menu-list::before {
  content: '';
  position: absolute;
  top: -10px;
  left: 0;
  right: 0;
  height: 10px;
}

.user-menu-dropdown:hover .dropdown-menu-list,
.user-menu-dropdown.active .dropdown-menu-list {
  display: block;
  animation: fadeInDown 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 18px;
  color: var(--text-muted);
  font-size: 0.88rem;
  transition: all var(--transition-fast);
}

.dropdown-item i {
  width: 18px;
  color: var(--primary);
}

.dropdown-item:hover {
  background: rgba(139, 92, 246, 0.15);
  color: #fff;
  padding-left: 22px;
}

.dropdown-divider {
  height: 1px;
  background: rgba(255, 255, 255, 0.06);
  margin: 6px 0;
}

/* Sub-header Filter Bar */
.header-filter-bar {
  border-top: 1px solid var(--border-color);
  padding: 10px 0;
  background: var(--bg-glass);
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.filter-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  overflow-x: auto;
  scrollbar-width: none;
}
.filter-wrapper::-webkit-scrollbar {
  display: none;
}

.filter-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: nowrap;
  margin: 0 auto;
}

.filter-select {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-muted);
  border: 1px solid var(--border-color);
  padding: 7px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-select option {
  background: var(--bg-secondary);
  color: var(--text-main);
}

.filter-select:hover,
.filter-select:focus {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--secondary);
  color: var(--text-main);
  box-shadow: 0 0 10px rgba(6, 182, 212, 0.2);
}

body.theme-light .header-filter-bar {
  background: rgba(248, 250, 252, 0.95);
  border-top: 1px solid rgba(0, 0, 0, 0.06);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

body.theme-light .filter-select {
  background: #ffffff;
  color: #1e293b;
  border: 1px solid rgba(0, 0, 0, 0.12);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

body.theme-light .filter-select option {
  background: #ffffff;
  color: #0f172a;
}

body.theme-light .filter-select:hover,
body.theme-light .filter-select:focus {
  background: #ffffff;
  border-color: var(--primary);
  color: var(--primary);
}

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

/* Nút mở tìm kiếm trên Mobile */
.mobile-search-btn {
  display: none;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  font-size: 0.95rem;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.mobile-search-btn:hover,
.mobile-search-btn.active {
  background: rgba(139, 92, 246, 0.2);
  border-color: var(--primary);
  color: #fff;
  box-shadow: 0 0 10px var(--primary-glow);
}

/* =========================================
   RESPONSIVE HEADER THEO MỌI KÍCH THƯỚC
   ========================================= */
@media (max-width: 992px) {
  .search-box-wrapper {
    width: 230px;
  }
}

@media (max-width: 768px) {
  .site-header {
    overflow: visible !important;
  }

  .site-header .container {
    padding: 0 14px;
  }

  .header-top {
    height: 62px;
    gap: 8px;
    justify-content: space-between;
    overflow: visible;
  }

  .logo {
    font-size: 1.18rem;
    gap: 6px;
    flex-shrink: 1;
    min-width: 0;
  }

  .logo-badge {
    font-size: 0.85rem;
    padding: 2px 7px;
    flex-shrink: 0;
  }

  .logo-text {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .header-right {
    gap: 8px;
    flex-shrink: 0;
  }

  .mobile-search-btn {
    display: flex;
    width: 34px;
    height: 34px;
    font-size: 0.88rem;
    flex-shrink: 0;
  }

  .header-vip-btn {
    padding: 5px 10px;
    font-size: 0.78rem;
    gap: 4px;
    flex-shrink: 0;
  }

  .user-menu-dropdown {
    position: relative;
    z-index: 1005;
    flex-shrink: 0;
  }

  .user-menu-btn {
    padding: 5px 10px;
    font-size: 0.82rem;
    gap: 6px;
    flex-shrink: 0;
  }

  .avatar-icon {
    width: 28px;
    height: 28px;
    font-size: 0.75rem;
  }

  .search-box-wrapper {
    position: absolute;
    top: 62px;
    left: 0;
    width: 100%;
    padding: 10px 14px;
    background: rgba(11, 13, 20, 0.98);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 10px 25px rgba(0,0,0,0.6);
    display: none;
    z-index: 1004;
    animation: fadeInDown 0.2s ease;
  }

  .search-box-wrapper.active {
    display: block;
  }

  .dropdown-menu-list {
    position: absolute;
    top: calc(100% + 8px);
    right: 0 !important;
    left: auto !important;
    width: 215px;
    max-width: calc(100vw - 20px);
    z-index: 1006;
  }

  /* Ẩn thanh bộ lọc trên header khi ở giao diện điện thoại (tránh bị cắt chữ), thay bằng mở cửa sổ nổi khi bấm Danh Mục ở footer */
  .header-filter-bar {
    display: none !important;
  }
}

@media (max-width: 480px) {
  .site-header .container {
    padding: 0 10px;
  }

  .header-top {
    height: 56px;
    gap: 6px;
  }

  .logo {
    font-size: 1.05rem;
    gap: 5px;
  }

  .logo-badge {
    font-size: 0.75rem;
    padding: 2px 5px;
  }

  .logo-text {
    font-size: 1rem;
  }

  .header-right {
    gap: 6px;
  }

  .mobile-search-btn {
    width: 32px;
    height: 32px;
    font-size: 0.8rem;
  }

  .header-vip-btn {
    padding: 4px 8px;
    font-size: 0.75rem;
    gap: 4px;
  }

  .user-menu-btn {
    padding: 3px 8px 3px 4px;
    font-size: 0.78rem;
    gap: 5px;
  }

  .user-menu-btn span {
    font-size: 0.76rem;
  }

  .user-menu-btn .fa-chevron-down {
    font-size: 0.65rem;
  }

  .avatar-icon {
    width: 26px;
    height: 26px;
    font-size: 0.7rem;
  }

  .dropdown-menu-list {
    width: 205px;
    right: 0 !important;
    left: auto !important;
    border-radius: 14px;
  }
}

@media (max-width: 380px) {
  .logo-text {
    font-size: 0.92rem;
  }

  .header-vip-btn span {
    display: none; /* Ẩn chữ Mua VIP, chỉ giữ icon vương miện trên màn hình siêu hẹp để ưu tiên menu Thông Tin */
  }

  .header-vip-btn {
    padding: 6px;
    border-radius: 50%;
    width: 30px;
    height: 30px;
    justify-content: center;
  }

  .user-menu-btn span {
    display: none; /* Giữ icon avatar và mũi tên trên màn hình siêu hẹp để không bao giờ bị che */
  }

  .user-menu-btn {
    padding: 3px 6px;
  }
}