/* ==========================================================================
   Header CSS — Announcement Bar, Main Header, Navigation, Mobile Menu
   ========================================================================== */

/* ── Announcement Bar ── */
.nb-announcement-bar {
    background: var(--nb-primary);
    color: var(--nb-white);
    padding: 8px 0;
    font-size: var(--nb-fs-sm);
    font-weight: 500;
    text-align: center;
    position: relative;
    z-index: 20;
    transition: all var(--nb-transition-base);
}

.nb-announcement-bar .nb-container {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.nb-announcement-link {
    color: var(--nb-white);
    text-decoration: underline;
    text-decoration-color: rgba(255, 255, 255, 0.4);
    text-underline-offset: 4px;
}

.nb-announcement-link:hover {
    color: var(--nb-accent-light);
    text-decoration-color: var(--nb-accent-light);
}

.nb-announcement-close {
    position: absolute;
    right: var(--nb-container-padding);
    background: transparent;
    border: none;
    color: rgba(255, 255, 255, 0.7);
    padding: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    transition: color var(--nb-transition-fast);
}

.nb-announcement-close:hover {
    color: var(--nb-white);
}

/* ── Main Header ── */
.nb-main-header {
    background: var(--nb-white);
    padding: var(--nb-space-md) 0;
    position: relative;
    z-index: 15;
    border-bottom: 1px solid var(--nb-gray-100);
}

.nb-main-header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--nb-space-xl);
}

.nb-mobile-menu-toggle {
    display: none;
    background: transparent;
    border: none;
    color: var(--nb-gray-800);
    padding: 8px;
    cursor: pointer;
}

.nb-site-branding {
    flex: 0 0 auto;
}

.nb-site-title {
    margin: 0;
    font-size: var(--nb-fs-2xl);
}

.nb-site-title a {
    color: var(--nb-primary);
}

.nb-site-description {
    margin: 0;
    font-size: var(--nb-fs-xs);
    color: var(--nb-gray-500);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.nb-header-search {
    flex: 1 1 auto;
    max-width: 600px;
}

.nb-search-form {
    display: flex;
    border: 1px solid var(--nb-gray-300);
    border-radius: var(--nb-radius-full);
    overflow: hidden;
    height: 46px;
    transition: border-color var(--nb-transition-fast);
}

.nb-search-form:focus-within {
    border-color: var(--nb-primary);
    box-shadow: 0 0 0 3px rgba(var(--nb-primary-rgb), 0.1);
}

.nb-search-cat-select {
    border: none;
    background: var(--nb-gray-100);
    padding: 0 15px;
    color: var(--nb-gray-700);
    border-right: 1px solid var(--nb-gray-300);
    outline: none;
    cursor: pointer;
    font-family: var(--nb-font-body);
    font-size: var(--nb-fs-sm);
}

.nb-search-input-wrap {
    flex: 1;
    display: flex;
    position: relative;
}

.nb-search-field {
    width: 100%;
    border: none;
    padding: 0 20px;
    outline: none;
    font-family: var(--nb-font-body);
    font-size: var(--nb-fs-base);
}

.nb-search-submit {
    background: transparent;
    border: none;
    padding: 0 20px;
    color: var(--nb-gray-500);
    cursor: pointer;
    transition: color var(--nb-transition-fast);
}

.nb-search-submit:hover {
    color: var(--nb-primary);
}

.nb-header-actions {
    display: flex;
    align-items: center;
    gap: var(--nb-space-md);
    flex: 0 0 auto;
}

.nb-action-icon {
    display: flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    border: none;
    color: var(--nb-gray-800);
    cursor: pointer;
    text-decoration: none;
    position: relative;
    padding: 8px;
    transition: color var(--nb-transition-fast);
}

.nb-action-icon:hover {
    color: var(--nb-primary);
}

.nb-wishlist-count,
.nb-cart-count {
    position: absolute;
    top: 0;
    left: 20px;
    background: var(--nb-accent);
    color: var(--nb-gray-800);
    font-size: 11px;
    font-weight: 700;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.nb-cart-total-display {
    font-weight: 600;
    font-size: var(--nb-fs-sm);
}

/* ── Navigation Bar ── */
.nb-navigation-bar {
    background: var(--nb-white);
    position: relative;
    z-index: 10;
    transition: all var(--nb-transition-base);
}

.nb-navigation-bar.is-sticky {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    box-shadow: var(--nb-shadow-md);
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from { transform: translateY(-100%); }
    to { transform: translateY(0); }
}

.nb-navigation-inner {
    display: flex;
    align-items: stretch;
    height: 56px;
}

/* Category Toggle */
.nb-category-nav {
    position: relative;
    height: 100%;
}

.nb-cat-toggle {
    height: 100%;
    background: var(--nb-primary);
    color: var(--nb-white);
    border: none;
    padding: 0 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--nb-font-heading);
    font-weight: 600;
    font-size: var(--nb-fs-md);
    cursor: pointer;
    min-width: 250px;
}

.nb-cat-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--nb-white);
    box-shadow: var(--nb-shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--nb-transition-base);
    border: 1px solid var(--nb-gray-100);
    border-top: none;
}

.nb-category-nav:hover .nb-cat-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* Primary Nav */
.nb-primary-nav {
    flex: 1;
    display: flex;
    align-items: center;
    padding: 0 var(--nb-space-xl);
}

.nb-primary-menu {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    align-items: center;
    gap: var(--nb-space-lg);
}

.nb-primary-menu > li > a {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--nb-gray-800);
    font-weight: 500;
    font-size: var(--nb-fs-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 18px 0;
    position: relative;
}

.nb-primary-menu > li > a::after {
    content: '';
    position: absolute;
    bottom: 12px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--nb-primary);
    transition: width var(--nb-transition-base);
}

.nb-primary-menu > li:hover > a::after {
    width: 100%;
}

.nb-primary-menu > li:hover > a {
    color: var(--nb-primary);
}

/* Sub Menus */
.nb-primary-menu .sub-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--nb-white);
    min-width: 220px;
    list-style: none;
    margin: 0;
    padding: 10px 0;
    box-shadow: var(--nb-shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--nb-transition-base);
    border: 1px solid var(--nb-gray-100);
    border-top: 2px solid var(--nb-primary);
}

.nb-primary-menu li:hover > .sub-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nb-primary-menu .sub-menu li {
    position: relative;
}

.nb-primary-menu .sub-menu a {
    display: block;
    padding: 10px 20px;
    color: var(--nb-gray-700);
    font-size: var(--nb-fs-sm);
    transition: all var(--nb-transition-fast);
}

.nb-primary-menu .sub-menu a:hover {
    color: var(--nb-primary);
    background: var(--nb-gray-50);
    padding-left: 25px;
}

/* Mega Menu */
.nb-mega-menu-item {
    position: static !important;
}

.nb-mega-menu-item > .sub-menu {
    width: 100%;
    left: 0;
    display: flex;
    flex-wrap: wrap;
    padding: var(--nb-space-xl) var(--nb-space-2xl);
    gap: var(--nb-space-xl);
}

.nb-mega-menu-item > .sub-menu > li {
    flex: 1;
    min-width: 200px;
}

.nb-mega-menu-item > .sub-menu > li > a {
    font-family: var(--nb-font-heading);
    font-size: var(--nb-fs-md);
    font-weight: 700;
    color: var(--nb-gray-800);
    padding: 0 0 10px 0;
    border-bottom: 1px solid var(--nb-gray-200);
    margin-bottom: 10px;
    pointer-events: none;
}

.nb-mega-menu-item > .sub-menu > li:hover > a {
    background: transparent;
    padding-left: 0;
}

.nb-mega-menu-item .sub-menu .sub-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    padding: 0;
    min-width: auto;
}

/* ── Mobile Menu ── */
.nb-mobile-menu-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: var(--nb-z-overlay);
    opacity: 0;
    visibility: hidden;
    transition: all var(--nb-transition-base);
}

.nb-mobile-menu-panel {
    position: fixed;
    top: 0;
    left: -320px;
    bottom: 0;
    width: 320px;
    background: var(--nb-white);
    z-index: var(--nb-z-modal);
    overflow-y: auto;
    transition: transform var(--nb-transition-base);
    display: flex;
    flex-direction: column;
}

.nb-mobile-menu-active {
    overflow: hidden;
}

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

.nb-mobile-menu-active .nb-mobile-menu-panel {
    transform: translateX(320px);
}

.nb-mobile-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--nb-space-md);
    border-bottom: 1px solid var(--nb-gray-200);
}

.nb-mobile-close {
    background: transparent;
    border: none;
    color: var(--nb-gray-800);
    cursor: pointer;
}

.nb-mobile-search {
    padding: var(--nb-space-md);
    border-bottom: 1px solid var(--nb-gray-100);
}

.nb-mobile-search .nb-search-form {
    height: 40px;
}

.nb-mobile-nav-wrap {
    flex: 1;
}

.nb-mobile-menu {
    list-style: none;
    margin: 0;
    padding: 0;
}

.nb-mobile-menu li {
    border-bottom: 1px solid var(--nb-gray-100);
}

.nb-mobile-menu a {
    display: block;
    padding: 15px 20px;
    color: var(--nb-gray-800);
    font-weight: 500;
}

.nb-mobile-actions {
    padding: var(--nb-space-md);
    background: var(--nb-gray-50);
}

.nb-mobile-action-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    color: var(--nb-gray-800);
    font-weight: 500;
}

/* ── Responsive ── */
@media (max-width: 1024px) {
    .nb-mobile-menu-toggle { display: block; }
    .nb-header-search { display: none; }
    .nb-navigation-bar { display: none; }
    
    .nb-header-actions .nb-account-link,
    .nb-header-actions .nb-wishlist-link,
    .nb-header-actions .nb-cart-total-display {
        display: none;
    }
}