/* ============================================
   MOHO Furniture - Header & Navigation
   ============================================ */

/* === Top Bar === */
.top-bar {
    background: var(--color-primary);
    color: var(--color-white);
    font-size: var(--fs-sm);
    height: var(--header-top-height);
    display: flex;
    align-items: center;
}

.top-bar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.top-bar__left {
    display: flex;
    align-items: center;
    gap: var(--space-6);
}

.top-bar__item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: rgba(255, 255, 255, 0.9);
    font-size: var(--fs-xs);
}

.top-bar__item i {
    font-size: var(--fs-sm);
}

.top-bar__right {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.top-bar__link {
    color: rgba(255, 255, 255, 0.9);
    font-size: var(--fs-xs);
    transition: color var(--transition-fast);
}

.top-bar__link:hover {
    color: var(--color-white);
}

/* === Main Header === */
.header {
    background: var(--color-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    transition: box-shadow var(--transition-base);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.header__main {
    height: var(--header-height);
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

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

.header__logo a {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.header__logo-icon {
    width: 44px;
    height: 44px;
    background: var(--color-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    font-weight: var(--fw-extrabold);
    font-size: var(--fs-xl);
}

.header__logo-text {
    font-size: var(--fs-2xl);
    font-weight: var(--fw-extrabold);
    color: var(--color-primary);
    letter-spacing: 2px;
}

.header__logo-tagline {
    font-size: 9px;
    color: var(--color-gray-500);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-weight: var(--fw-medium);
}

/* Search */
.header__search {
    flex: 1;
    max-width: 480px;
    position: relative;
}

.header__search-input {
    width: 100%;
    height: 42px;
    padding: 0 48px 0 20px;
    border: 1.5px solid var(--color-gray-300);
    border-radius: var(--radius-full);
    font-size: var(--fs-base);
    transition: all var(--transition-fast);
    background: var(--color-gray-50);
}

.header__search-input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-50);
    background: var(--color-white);
}

.header__search-btn {
    position: absolute;
    right: 4px;
    top: 50%;
    transform: translateY(-50%);
    width: 36px;
    height: 36px;
    background: var(--color-primary);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    transition: background var(--transition-fast);
}

.header__search-btn:hover {
    background: var(--color-primary-dark);
}

/* Header Actions */
.header__actions {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.header__action {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    text-align: center;
    position: relative;
}

.header__action:hover {
    background: var(--color-gray-50);
    color: var(--color-primary);
}

.header__action-icon {
    font-size: 22px;
    position: relative;
}

.header__action-badge {
    position: absolute;
    top: -6px;
    right: -10px;
    background: var(--color-accent);
    color: var(--color-white);
    font-size: 10px;
    font-weight: var(--fw-bold);
    min-width: 18px;
    height: 18px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 4px;
}

.header__action-label {
    font-size: 11px;
    font-weight: var(--fw-medium);
    color: var(--color-gray-600);
}

/* === Navigation === */
.nav {
    background: var(--color-white);
    border-top: 1px solid var(--color-gray-100);
}

.nav__list {
    display: flex;
    align-items: center;
    height: 48px;
}

.nav__item {
    position: relative;
}

.nav__link {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    padding: 0 var(--space-5);
    height: 48px;
    font-size: var(--fs-base);
    font-weight: var(--fw-semibold);
    color: var(--color-gray-700);
    text-transform: uppercase;
    letter-spacing: 0.3px;
    transition: all var(--transition-fast);
    white-space: nowrap;
    position: relative;
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: var(--space-5);
    right: var(--space-5);
    height: 2px;
    background: var(--color-primary);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.nav__link:hover,
.nav__item:hover .nav__link {
    color: var(--color-primary);
}

.nav__link:hover::after,
.nav__item:hover .nav__link::after {
    transform: scaleX(1);
}

.nav__link .arrow {
    font-size: 10px;
    transition: transform var(--transition-fast);
}

.nav__item:hover .nav__link .arrow {
    transform: rotate(180deg);
}

.nav__link--highlight {
    color: var(--color-accent) !important;
}

/* === Mega Menu === */
.mega-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 700px;
    background: var(--color-white);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    box-shadow: var(--shadow-xl);
    padding: var(--space-8);
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-8);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-base);
    z-index: var(--z-dropdown);
    border-top: 3px solid var(--color-primary);
}

.nav__item:hover .mega-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.mega-menu__column {
    /* column */
}

.mega-menu__title {
    font-size: var(--fs-sm);
    font-weight: var(--fw-bold);
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--space-4);
    padding-bottom: var(--space-2);
    border-bottom: 2px solid var(--color-primary-50);
}

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

.mega-menu__link {
    padding: var(--space-2) 0;
    font-size: var(--fs-base);
    color: var(--color-gray-600);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.mega-menu__link:hover {
    color: var(--color-primary);
    padding-left: var(--space-2);
}

.mega-menu__link:hover::before {
    content: '›';
    color: var(--color-accent);
    font-weight: bold;
    margin-left: -14px;
}

/* Simple Dropdown */
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 220px;
    background: var(--color-white);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    box-shadow: var(--shadow-xl);
    padding: var(--space-3) 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-base);
    z-index: var(--z-dropdown);
    border-top: 3px solid var(--color-primary);
}

.nav__item:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu__link {
    display: block;
    padding: var(--space-3) var(--space-5);
    font-size: var(--fs-base);
    color: var(--color-gray-600);
    transition: all var(--transition-fast);
}

.dropdown-menu__link:hover {
    background: var(--color-primary-50);
    color: var(--color-primary);
    padding-left: var(--space-6);
}

/* === Mobile Menu Toggle === */
.mobile-menu-toggle {
    display: none;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--color-gray-700);
    border-radius: var(--radius-md);
}

.mobile-menu-toggle:hover {
    background: var(--color-gray-100);
}

/* === Mobile Responsive === */
@media (max-width: 1024px) {
    .top-bar {
        display: none;
    }

    .header__main {
        gap: var(--space-4);
    }

    .header__search {
        max-width: 300px;
    }

    .nav__link {
        padding: 0 var(--space-3);
        font-size: var(--fs-sm);
    }
}

@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
    }

    .header__main {
        height: 60px;
    }

    .header__search {
        display: none;
    }

    .header__search.mobile-active {
        display: block;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        max-width: none;
        padding: var(--space-3) var(--space-4);
        background: var(--color-white);
        box-shadow: var(--shadow-md);
    }

    .nav {
        position: fixed;
        top: 0;
        left: -100%;
        width: 85%;
        max-width: 360px;
        height: 100vh;
        background: var(--color-white);
        z-index: var(--z-modal);
        transition: left var(--transition-slow);
        overflow-y: auto;
        box-shadow: var(--shadow-xl);
    }

    .nav.mobile-open {
        left: 0;
    }

    .nav__list {
        flex-direction: column;
        height: auto;
        padding: var(--space-6) 0;
    }

    .nav__item {
        width: 100%;
    }

    .nav__link {
        height: auto;
        padding: var(--space-4) var(--space-6);
        justify-content: space-between;
    }

    .nav__link::after {
        display: none;
    }

    .mega-menu,
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border-top: none;
        min-width: auto;
        display: none;
        padding: 0 var(--space-6) var(--space-4);
        grid-template-columns: 1fr;
        border-radius: 0;
        background: var(--color-gray-50);
    }

    .mega-menu.mobile-open,
    .dropdown-menu.mobile-open {
        display: grid;
    }

    .header__action-label {
        display: none;
    }

    /* Mobile overlay */
    .nav-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: var(--bg-overlay);
        z-index: calc(var(--z-modal) - 1);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
    }

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