/* ==========================================================================
   KAMEU New - Header, Top Bar, Navigation, Mega Menu
   ========================================================================== */

/* ── Top Bar ── */
.kn-topbar {
    background: var(--kn-tech-dark);
    color: var(--kn-gray-300);
    font-size: var(--kn-text-sm);
    height: var(--kn-topbar-height);
    display: flex;
    align-items: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.kn-topbar__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--kn-space-4);
}

.kn-topbar__left,
.kn-topbar__right {
    display: flex;
    align-items: center;
    gap: var(--kn-space-3);
}

.kn-topbar__center {
    flex: 1;
    text-align: center;
}

.kn-topbar__item {
    display: inline-flex;
    align-items: center;
    gap: var(--kn-space-1);
    color: var(--kn-gray-300);
}

.kn-topbar__item a {
    color: var(--kn-gray-300);
    transition: color var(--kn-transition-fast);
}

.kn-topbar__item a:hover {
    color: var(--kn-white);
}

.kn-topbar__separator {
    color: var(--kn-gray-600);
    opacity: 0.5;
}

.kn-topbar__promo {
    display: inline-flex;
    align-items: center;
    gap: var(--kn-space-2);
    color: var(--kn-deal-yellow);
    font-weight: var(--kn-weight-medium);
}

.kn-topbar__lang-toggle {
    color: var(--kn-gray-300);
    display: inline-flex;
    align-items: center;
    gap: 2px;
    font-size: var(--kn-text-sm);
    font-weight: var(--kn-weight-medium);
}

.kn-topbar__track {
    text-decoration: none;
}

/* ── Main Header ── */
.kn-header {
    background: var(--kn-white);
    position: relative;
    z-index: var(--kn-z-sticky);
}

.kn-header__main {
    border-bottom: 1px solid var(--kn-gray-100);
}

.kn-header__inner {
    display: flex;
    align-items: center;
    gap: var(--kn-space-6);
    height: var(--kn-header-height);
}

/* Logo */
.kn-header__logo {
    flex-shrink: 0;
}

.kn-header__logo .custom-logo {
    height: 48px;
    width: auto;
}

.kn-header__site-title {
    font-family: var(--kn-font-heading);
    font-size: var(--kn-text-2xl);
    font-weight: var(--kn-weight-extrabold);
    color: var(--kn-primary);
    display: flex;
    align-items: baseline;
    gap: 2px;
    white-space: nowrap;
}

.kn-header__brand-k {
    color: var(--kn-secondary);
    font-size: var(--kn-text-3xl);
}

.kn-header__brand-tag {
    font-size: var(--kn-text-xs);
    font-weight: var(--kn-weight-medium);
    color: var(--kn-gray-400);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-left: var(--kn-space-2);
}

/* Search */
.kn-header__search {
    flex: 1;
    max-width: 600px;
}

.kn-search-form {
    display: flex;
    border: 2px solid var(--kn-gray-200);
    border-radius: var(--kn-radius-md);
    overflow: hidden;
    position: relative;
    transition: border-color var(--kn-transition-fast);
}

.kn-search-form:focus-within {
    border-color: var(--kn-secondary);
    box-shadow: 0 0 0 3px rgba(200, 149, 46, 0.1);
}

.kn-search-form__category {
    border-right: 1px solid var(--kn-gray-200);
    flex-shrink: 0;
}

.kn-search-form__select {
    height: 100%;
    padding: 0 var(--kn-space-3);
    border: none;
    background: var(--kn-gray-50);
    color: var(--kn-gray-600);
    font-size: var(--kn-text-sm);
    cursor: pointer;
    min-width: 160px;
    outline: none;
}

.kn-search-form__input-wrap {
    display: flex;
    flex: 1;
    align-items: center;
}

.kn-search-form__input {
    flex: 1;
    height: 46px;
    padding: 0 var(--kn-space-4);
    border: none;
    outline: none;
    font-size: var(--kn-text-sm);
    background: transparent;
}

.kn-search-form__submit {
    width: 50px;
    height: 46px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--kn-secondary);
    color: var(--kn-white);
    border: none;
    cursor: pointer;
    transition: background var(--kn-transition-fast);
}

.kn-search-form__submit:hover {
    background: var(--kn-secondary-dark);
}

/* Search Results Dropdown */
.kn-search-results {
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    right: 0;
    background: var(--kn-white);
    border-radius: var(--kn-radius-md);
    box-shadow: var(--kn-shadow-lg);
    max-height: 400px;
    overflow-y: auto;
    z-index: var(--kn-z-dropdown);
}

.kn-search-results__item {
    display: flex;
    align-items: center;
    gap: var(--kn-space-3);
    padding: var(--kn-space-3) var(--kn-space-4);
    border-bottom: 1px solid var(--kn-gray-100);
    transition: background var(--kn-transition-fast);
}

.kn-search-results__item:hover {
    background: var(--kn-gray-50);
}

.kn-search-results__img {
    width: 50px;
    height: 50px;
    object-fit: cover;
    border-radius: var(--kn-radius-sm);
}

.kn-search-results__info {
    flex: 1;
}

.kn-search-results__title {
    font-size: var(--kn-text-sm);
    font-weight: var(--kn-weight-medium);
    color: var(--kn-gray-800);
}

.kn-search-results__price {
    font-size: var(--kn-text-sm);
    font-weight: var(--kn-weight-bold);
    color: var(--kn-secondary);
}

/* Header Actions */
.kn-header__actions {
    display: flex;
    align-items: center;
    gap: var(--kn-space-4);
    flex-shrink: 0;
}

.kn-header__action {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    color: var(--kn-gray-700);
    position: relative;
    transition: color var(--kn-transition-fast);
    text-decoration: none;
}

.kn-header__action:hover {
    color: var(--kn-secondary);
}

.kn-header__action-label {
    font-size: var(--kn-text-xs);
    font-weight: var(--kn-weight-medium);
}

/* Dark Mode Toggle */
.kn-darkmode-toggle {
    border: none;
    background: none;
    padding: var(--kn-space-2);
    cursor: pointer;
}

.kn-darkmode-toggle__moon {
    display: none;
}

body.kn-dark-mode .kn-darkmode-toggle__sun {
    display: none;
}

body.kn-dark-mode .kn-darkmode-toggle__moon {
    display: block;
}

.kn-header__action-count,
.kn-header__cart-count {
    position: absolute;
    top: -6px;
    right: -6px;
    background: var(--kn-secondary);
    color: var(--kn-white);
    font-size: 10px;
    font-weight: var(--kn-weight-bold);
    width: 18px;
    height: 18px;
    border-radius: var(--kn-radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.kn-header__cart {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    color: var(--kn-gray-700);
    position: relative;
    cursor: pointer;
}

.kn-header__cart:hover {
    color: var(--kn-secondary);
}

.kn-header__cart-total {
    font-size: var(--kn-text-xs);
    font-weight: var(--kn-weight-bold);
    color: var(--kn-secondary);
}

/* Mobile Toggle */
.kn-header__mobile-toggle {
    display: none;
    padding: var(--kn-space-2);
}

.kn-hamburger {
    display: flex;
    flex-direction: column;
    gap: 5px;
    width: 24px;
}

.kn-hamburger span {
    display: block;
    height: 2px;
    background: var(--kn-gray-800);
    border-radius: 2px;
    transition: var(--kn-transition-fast);
}

.kn-hamburger span:nth-child(2) {
    width: 75%;
}

.kn-header__mobile-toggle[aria-expanded="true"] .kn-hamburger span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.kn-header__mobile-toggle[aria-expanded="true"] .kn-hamburger span:nth-child(2) {
    opacity: 0;
}

.kn-header__mobile-toggle[aria-expanded="true"] .kn-hamburger span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ── Navigation Bar ── */
.kn-nav {
    background: var(--kn-primary);
    height: var(--kn-nav-height);
}

.kn-nav__inner {
    display: flex;
    align-items: center;
    height: 100%;
    gap: 0;
}

/* Categories Dropdown */
.kn-nav__categories {
    position: relative;
    flex-shrink: 0;
}

.kn-nav__categories-toggle {
    display: flex;
    align-items: center;
    gap: var(--kn-space-2);
    height: var(--kn-nav-height);
    padding: 0 var(--kn-space-3);
    background: var(--kn-secondary);
    color: var(--kn-white);
    font-size: var(--kn-text-xs);
    font-weight: var(--kn-weight-semibold);
    white-space: nowrap;
    cursor: pointer;
    transition: background var(--kn-transition-fast);
}

.kn-nav__categories-toggle:hover {
    background: var(--kn-secondary-dark);
}

.kn-nav__chevron {
    transition: transform var(--kn-transition-fast);
}

.kn-nav__categories.is-open .kn-nav__chevron {
    transform: rotate(180deg);
}

.kn-categories-dropdown__wrap {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 280px;
    background: var(--kn-white);
    border-radius: 0 0 var(--kn-radius-md) var(--kn-radius-md);
    box-shadow: var(--kn-shadow-mega);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity var(--kn-transition), transform var(--kn-transition), visibility var(--kn-transition);
    z-index: var(--kn-z-mega-menu);
}

.kn-nav__categories.is-open .kn-categories-dropdown__wrap {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.kn-categories-dropdown {
    padding: var(--kn-space-2) 0;
}

.kn-categories-dropdown li {
    position: relative;
}

.kn-categories-dropdown li a {
    display: flex;
    align-items: center;
    gap: var(--kn-space-3);
    padding: var(--kn-space-3) var(--kn-space-4);
    color: var(--kn-gray-700);
    font-size: var(--kn-text-sm);
    transition: all var(--kn-transition-fast);
}

.kn-categories-dropdown li a:hover {
    background: var(--kn-gray-50);
    color: var(--kn-secondary);
    padding-left: var(--kn-space-5);
}

/* Sub-menu in categories dropdown */
.kn-categories-dropdown .menu-item-has-children > a::after {
    content: '';
    display: inline-block;
    width: 6px;
    height: 6px;
    border-right: 1.5px solid currentColor;
    border-bottom: 1.5px solid currentColor;
    transform: rotate(-45deg);
    margin-left: auto;
    opacity: 0.5;
}

.kn-categories-dropdown .sub-menu {
    display: none;
    list-style: none;
    padding: 0;
    margin: 0;
    background: var(--kn-gray-50);
}

.kn-categories-dropdown li:hover > .sub-menu {
    display: block;
}

.kn-categories-dropdown .sub-menu li a {
    padding-left: var(--kn-space-8);
    font-size: var(--kn-text-xs);
    color: var(--kn-gray-500);
}

.kn-categories-dropdown .sub-menu li a:hover {
    color: var(--kn-secondary);
    padding-left: calc(var(--kn-space-8) + var(--kn-space-1));
}

/* ── Mega Menu ── */
.kn-nav__menu {
    flex: 1;
}

.kn-mega-menu {
    display: flex;
    align-items: stretch;
    flex-wrap: nowrap;
    gap: 0;
    height: var(--kn-nav-height);
    margin: 0;
    padding: 0;
}

.kn-mega-menu__item {
    position: relative;
    display: flex;
    align-items: center;
}

.kn-mega-menu__link {
    display: flex;
    align-items: center;
    gap: var(--kn-space-1);
    padding: var(--kn-space-1) var(--kn-space-2);
    color: var(--kn-white);
    font-size: var(--kn-text-xs);
    font-weight: var(--kn-weight-medium);
    text-transform: uppercase;
    letter-spacing: 0.01em;
    line-height: 1.2;
    text-align: center;
    transition: color var(--kn-transition-fast), background var(--kn-transition-fast);
}

.kn-mega-menu__link:hover,
.kn-mega-menu__item:hover > .kn-mega-menu__link {
    color: var(--kn-white);
    background: rgba(255, 255, 255, 0.1);
}

.kn-mega-menu__chevron {
    opacity: 0.7;
    transition: transform var(--kn-transition-fast);
}

.kn-mega-menu__item:hover .kn-mega-menu__chevron {
    transform: rotate(180deg);
}

/* Dropdown */
.kn-mega-menu__dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 800px;
    background: var(--kn-white);
    border-radius: 0 0 var(--kn-radius-md) var(--kn-radius-md);
    box-shadow: var(--kn-shadow-mega);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-4px);
    transition: opacity var(--kn-transition), transform var(--kn-transition), visibility var(--kn-transition);
    z-index: var(--kn-z-mega-menu);
}

.kn-mega-menu__item:hover > .kn-mega-menu__dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.kn-mega-menu__dropdown-inner {
    padding: var(--kn-space-6);
}

.kn-mega-menu__columns {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--kn-space-6);
}

.kn-mega-menu__column-title {
    display: block;
    font-size: var(--kn-text-sm);
    font-weight: var(--kn-weight-bold);
    color: var(--kn-gray-800);
    text-transform: uppercase;
    padding-bottom: var(--kn-space-3);
    margin-bottom: var(--kn-space-3);
    border-bottom: 2px solid var(--kn-secondary);
}

.kn-mega-menu__sub-list {
    display: flex;
    flex-direction: column;
    gap: var(--kn-space-1);
}

.kn-mega-menu__sub-link {
    display: block;
    padding: var(--kn-space-2) 0;
    color: var(--kn-gray-600);
    font-size: var(--kn-text-sm);
    transition: color var(--kn-transition-fast), padding var(--kn-transition-fast);
}

.kn-mega-menu__sub-link:hover {
    color: var(--kn-secondary);
    padding-left: var(--kn-space-2);
}

/* Nav Extras */
.kn-nav__extras {
    margin-left: auto;
    flex-shrink: 0;
}

.kn-nav__deal-link {
    display: inline-flex;
    align-items: center;
    gap: var(--kn-space-1);
    padding: 0 var(--kn-space-2);
    color: var(--kn-deal-yellow);
    font-size: var(--kn-text-xs);
    font-weight: var(--kn-weight-bold);
    text-transform: uppercase;
    white-space: nowrap;
    animation: kn-pulse-glow 2s infinite;
}

@keyframes kn-pulse-glow {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* ── Sticky Header ── */
.kn-header.is-sticky {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--kn-z-sticky);
    box-shadow: var(--kn-shadow-md);
    animation: kn-slide-down 300ms var(--kn-ease);
}

.kn-header.is-sticky .kn-topbar {
    display: none;
}

.kn-header.is-sticky .kn-header__inner {
    height: var(--kn-sticky-height);
}

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