/* ============================================
   Header Styles - Thiên Long Shop
   Matching thienlong.vn EXACTLY
   ============================================ */

/* Main Header - Dark Blue like thienlong.vn */
.site-header {
    background: var(--tl-primary);
    position: sticky;
    top: 0;
    z-index: var(--tl-z-header);
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

.header-main {
    padding: 14px 0;
}

.header-inner {
    display: flex;
    align-items: center;
    gap: var(--tl-space-xl);
}

/* Logo - White on dark bg */
.header-logo {
    flex-shrink: 0;
}

.logo-link {
    display: flex;
    align-items: center;
}

.header-logo-img {
    max-height: 40px;
    width: auto;
    filter: brightness(0) invert(1);
}

.logo-text {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255,255,255,0.15);
    border-radius: var(--tl-radius-md);
    color: var(--tl-white);
    font-size: 20px;
}

.logo-words {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.logo-brand {
    font-size: 20px;
    font-weight: 800;
    color: var(--tl-white);
    letter-spacing: 1px;
}

.logo-sub {
    font-size: 11px;
    font-weight: 600;
    color: rgba(255,255,255,0.7);
    letter-spacing: 3px;
}

/* Search - White bar like thienlong.vn */
.header-search {
    flex: 1;
    max-width: 600px;
    position: relative;
}

.search-input-wrapper {
    display: flex;
    align-items: center;
    background: var(--tl-white);
    border-radius: 50px;
    overflow: visible;
    border: none;
    transition: var(--tl-transition);
    padding: 5px 5px 5px 0;
}

.search-input-wrapper:focus-within {
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.3);
}

.search-field {
    flex: 1;
    border: none;
    padding: 11px 20px;
    font-size: var(--tl-font-size-base);
    outline: none;
    background: transparent;
    color: var(--tl-text);
}

.search-field::placeholder {
    color: var(--tl-text-muted);
}

/* Search button - round circle like thienlong.vn */
.search-submit {
    width: 40px;
    height: 40px;
    min-width: 40px;
    padding: 0;
    background: #4a5568;
    color: var(--tl-white);
    border: none;
    font-size: 15px;
    transition: var(--tl-transition);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.search-submit:hover {
    background: #2d3748;
}

/* Search Suggestions */
.search-suggestions {
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    right: 0;
    background: var(--tl-white);
    border-radius: var(--tl-radius-lg);
    box-shadow: var(--tl-shadow-lg);
    display: none;
    z-index: var(--tl-z-dropdown);
    max-height: 400px;
    overflow-y: auto;
}

.search-suggestions.active {
    display: block;
}

/* Header Actions - White text on dark bg */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--tl-space-lg);
}

.header-action {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 10px;
    border-radius: var(--tl-radius-md);
    transition: var(--tl-transition);
    color: var(--tl-white);
    white-space: nowrap;
}

.header-action:hover {
    background: rgba(255,255,255,0.1);
    color: var(--tl-white);
}

.header-action i {
    font-size: 20px;
    color: var(--tl-white);
}

.action-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.action-label {
    font-size: var(--tl-font-size-xs);
    color: rgba(255,255,255,0.7);
}

.action-value {
    font-size: var(--tl-font-size-sm);
    font-weight: 600;
    color: var(--tl-white);
}

/* Cart */
.cart-icon-wrapper {
    position: relative;
}

.header-cart .cart-icon-wrapper i {
    font-size: 22px;
}

.cart-count {
    position: absolute;
    top: -8px;
    right: -8px;
    background: var(--tl-red);
    color: var(--tl-white);
    font-size: 10px;
    font-weight: 700;
    width: 18px;
    height: 18px;
    border-radius: var(--tl-radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    margin-right: -2px;
    cursor: pointer;
}

.hamburger-bar {
    width: 24px;
    height: 2.5px;
    background: var(--tl-white);
    border-radius: 2px;
    transition: var(--tl-transition);
}

/* Navigation Bar - light blue-gray bg like thienlong.vn */
.main-navigation {
    background: #f5f7fa;
    border-bottom: 1px solid #e8ecf1;
    position: relative;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04);
    z-index: 100;
}

.nav-inner {
    display: flex;
    align-items: center;
}

/* Inline Main Menu - thienlong.vn style */
.main-menu-inline {
    display: flex;
    align-items: center;
    width: 100%;
    justify-content: space-between;
}

.nav-menu-item {
    position: static;
}

.nav-menu-item > a {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 16px;
    color: var(--tl-text);
    font-size: var(--tl-font-size-sm);
    font-weight: 600;
    white-space: nowrap;
    transition: var(--tl-transition);
    position: relative;
}

.nav-menu-item > a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--tl-primary);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-menu-item:hover > a::after,
.nav-menu-item.active > a::after {
    width: 80%;
}

.nav-menu-item > a:hover,
.nav-menu-item:hover > a {
    color: var(--tl-primary);
}

.nav-menu-item > a i:first-child {
    font-size: 16px;
    color: var(--tl-primary);
}

.nav-menu-item > a .nav-arrow {
    font-size: 9px;
    opacity: 0.6;
    transition: var(--tl-transition);
    margin-left: 2px;
}

.nav-menu-item:hover > a .nav-arrow {
    transform: rotate(180deg);
    opacity: 1;
}

/* ============================================
   Mega Dropdown Menu - thienlong.vn style
   ============================================ */
.mega-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    width: 100%;
    background: var(--tl-white);
    box-shadow: 0 8px 30px rgba(0,0,0,0.12), 0 2px 8px rgba(0,0,0,0.06);
    z-index: 200;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-4px);
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    border-top: 2px solid var(--tl-primary);
    pointer-events: none;
}

.nav-menu-item:hover > .mega-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
}

.mega-dropdown-inner {
    display: flex;
    max-width: var(--tl-container, 1280px);
    margin: 0 auto;
    padding: 24px 20px;
    gap: 24px;
    min-height: 200px;
}

/* Left section: Category links in columns */
.mega-dropdown-content {
    flex: 1;
    display: flex;
    gap: 32px;
    min-width: 0;
}

.mega-col {
    flex: 1;
    min-width: 180px;
}

.mega-category-group {
    margin-bottom: 4px;
}

.mega-category-title {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 600;
    color: var(--tl-text);
    padding: 4px 0;
    transition: all 0.2s ease;
    cursor: pointer;
    border-bottom: 1px solid transparent;
    line-height: 1.3;
}

.mega-category-title:hover {
    color: var(--tl-primary);
}

.mega-sub-arrow {
    font-size: 8px;
    opacity: 0.5;
    transition: transform 0.2s ease;
}

.mega-category-title:hover .mega-sub-arrow {
    transform: rotate(180deg);
    opacity: 1;
}

/* Subcategory list (level 3) */
.mega-subcategory-list {
    padding: 4px 0 4px 0;
    margin: 0;
    list-style: none;
}

.mega-subcategory-list li {
    margin: 0;
}

.mega-subcategory-list li a {
    display: block;
    padding: 5px 0 5px 12px;
    color: #555;
    font-size: 13px;
    font-weight: 400;
    transition: all 0.2s ease;
    position: relative;
}

.mega-subcategory-list li a::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: transparent;
    transform: translateY(-50%);
    transition: background 0.2s ease;
}

.mega-subcategory-list li a:hover {
    color: var(--tl-primary);
    padding-left: 16px;
}

.mega-subcategory-list li a:hover::before {
    background: var(--tl-primary);
}

/* Right section: Promotional banner */
.mega-dropdown-banner {
    width: 320px;
    flex-shrink: 0;
    border-radius: 8px;
    overflow: hidden;
}

.mega-banner-link {
    display: block;
    width: 100%;
    height: 100%;
    border-radius: 8px;
    overflow: hidden;
    transition: transform 0.3s ease;
}

.mega-banner-link:hover {
    transform: scale(1.02);
}

.mega-banner-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 8px;
}

/* Placeholder promo banner when no image */
.mega-banner-placeholder {
    background: linear-gradient(135deg, var(--tl-primary) 0%, #2c4a8a 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
}

.mega-banner-promo {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    color: white;
    text-align: center;
    padding: 24px;
}

.mega-promo-icon {
    font-size: 40px;
    opacity: 0.9;
}

.mega-promo-title {
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.mega-promo-cta {
    font-size: 13px;
    font-weight: 500;
    opacity: 0.85;
    padding: 6px 16px;
    background: rgba(255,255,255,0.15);
    border-radius: 20px;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 6px;
}

.mega-banner-placeholder:hover .mega-promo-cta {
    background: rgba(255,255,255,0.25);
    gap: 10px;
}

/* Mobile Menu */
.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: var(--tl-z-overlay);
    opacity: 0;
    visibility: hidden;
    transition: var(--tl-transition);
}

.mobile-menu-overlay.active {
    opacity: 1;
    visibility: visible;
}

.mobile-menu-panel {
    position: absolute;
    top: 0;
    left: 0;
    width: 300px;
    height: 100%;
    background: var(--tl-white);
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    overflow-y: auto;
}

.mobile-menu-overlay.active .mobile-menu-panel {
    transform: translateX(0);
}

.mobile-menu-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px;
    background: var(--tl-primary);
    color: var(--tl-white);
}

.mobile-menu-title {
    font-size: var(--tl-font-size-lg);
    font-weight: 700;
}

.mobile-menu-close {
    color: var(--tl-white);
    font-size: 20px;
    padding: 4px;
}

.mobile-menu-search {
    padding: 12px 16px;
    border-bottom: 1px solid var(--tl-border-light);
}

.mobile-menu-search form {
    display: flex;
    border: 1px solid var(--tl-border);
    border-radius: var(--tl-radius-md);
    overflow: hidden;
}

.mobile-menu-search input {
    flex: 1;
    padding: 10px 12px;
    border: none;
    outline: none;
    font-size: var(--tl-font-size-base);
}

.mobile-menu-search button {
    padding: 10px 14px;
    background: var(--tl-primary);
    color: var(--tl-white);
    border: none;
}

.mobile-menu-list {
    padding: 0;
}

.mobile-menu-item {
    border-bottom: 1px solid var(--tl-border-light);
}

.mobile-menu-link-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.mobile-menu-link-row a {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 16px;
    color: var(--tl-text);
    font-size: var(--tl-font-size-base);
    font-weight: 500;
}

.mobile-menu-link-row a i {
    width: 20px;
    text-align: center;
    color: var(--tl-primary);
    font-size: 14px;
}

.mobile-menu-link-row a:hover {
    background: var(--tl-bg);
    color: var(--tl-primary);
}

.mobile-submenu-toggle {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--tl-text-muted);
    font-size: 12px;
    background: none;
    border: none;
    border-left: 1px solid var(--tl-border-light);
    cursor: pointer;
    transition: var(--tl-transition);
}

.mobile-submenu-toggle:hover {
    background: var(--tl-bg);
    color: var(--tl-primary);
}

.mobile-submenu-toggle.active i {
    transform: rotate(180deg);
}

.mobile-submenu {
    display: none;
    background: var(--tl-bg-light);
}

.mobile-submenu.active {
    display: block;
}

.mobile-submenu li a {
    display: block;
    padding: 10px 16px 10px 46px;
    color: var(--tl-text-secondary);
    font-size: 13px;
    border-top: 1px solid var(--tl-border-light);
}

.mobile-submenu li a:hover {
    color: var(--tl-primary);
    background: var(--tl-bg);
}

/* Header Sticky Animation */
.site-header.scrolled {
    box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}