/**
 * Header Styles
 * Fresh implementation - aesthetic header with mega menu
 */

/* ==========================================================================
   Header Layout
   ========================================================================== */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 200;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-gray-200);
    height: 72px;
    transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.header-inner {
    height: 100%;
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    gap: var(--space-6);
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-4);
}

.header-logo a,
.header-logo img {
    display: block;
    max-height: 48px;
    width: auto;
}

/* ==========================================================================
   Header Menu - Horizontal Nav
   ========================================================================== */

.header-nav {
    display: none;
}

@media (min-width: 1024px) {
    .header-nav {
        display: flex;
        flex: 1;
        justify-content: center;
        margin: 0 var(--space-6);
    }

    .mobile-menu-toggle {
        display: none;
    }
}

.header-menu {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    list-style: none;
    margin: 0;
    padding: 0;
}

.header-menu-item {
    position: relative;
}

.header-menu-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-2) var(--space-4);
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-gray-700);
    text-decoration: none;
    border-radius: var(--radius);
    transition: color 0.15s ease, background-color 0.15s ease;
}

.header-menu-link:hover,
.header-menu-link.is-current {
    color: var(--color-primary);
    background: var(--color-gray-100);
}

.header-menu-arrow {
    flex-shrink: 0;
    transition: transform 0.2s ease;
}

/* ==========================================================================
   Mega Menu
   ========================================================================== */

.header-menu-item--dropdown .mega-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    width: 720px;
    max-width: calc(100vw - var(--space-8));
    padding-top: var(--space-3);
    z-index: 100;
    pointer-events: none;
}

.header-menu-item--dropdown .mega-menu-inner {
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 40px -10px rgba(0, 0, 0, 0.15);
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease;
}

.header-menu-item--dropdown:hover .mega-menu,
.header-menu-item--dropdown.is-open .mega-menu {
    pointer-events: auto;
}

.header-menu-item--dropdown:hover .mega-menu-inner,
.header-menu-item--dropdown.is-open .mega-menu-inner {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.header-menu-item--dropdown:hover .header-menu-arrow {
    transform: rotate(180deg);
}

.mega-menu-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
    list-style: none;
    margin: 0;
    padding: var(--space-4);
}

.mega-menu-grid li {
    margin: 0;
}

.mega-menu-grid a {
    display: block;
    padding: var(--space-2) var(--space-3);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-gray-700);
    text-decoration: none;
    border-radius: var(--radius);
    transition: color 0.15s ease, background-color 0.15s ease;
}

.mega-menu-grid a:hover {
    color: var(--color-primary);
    background: var(--color-gray-100);
}

@media (max-width: 1023px) {
    .header-menu-item--dropdown .mega-menu {
        width: calc(100vw - var(--space-8));
        left: 50%;
    }

    .mega-menu-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .mega-menu-grid {
        grid-template-columns: 1fr;
    }
}

/* ==========================================================================
   Header Actions (Search, Account, Cart)
   ========================================================================== */

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.header-action {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    padding: 0;
    background: transparent;
    border: none;
    border-radius: var(--radius);
    color: var(--color-gray-700);
    cursor: pointer;
    transition: background-color 0.15s ease, color 0.15s ease;
}

.header-action:hover {
    background: var(--color-gray-100);
    color: var(--color-primary);
}

.header-action.account-link {
    text-decoration: none;
}

.cart-toggle {
    position: relative;
}

.cart-count {
    position: absolute;
    top: 6px;
    right: 6px;
    min-width: 18px;
    height: 18px;
    padding: 0 5px;
    background: var(--color-primary);
    color: var(--color-white);
    font-size: 0.6875rem;
    font-weight: 600;
    line-height: 18px;
    text-align: center;
    border-radius: 999px;
}

.cart-count:empty {
    display: none;
}

/* ==========================================================================
   Mobile Menu Toggle
   ========================================================================== */

.mobile-menu-toggle {
    display: flex;
}

.hamburger {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 20px;
    height: 20px;
}

.hamburger span {
    display: block;
    width: 100%;
    height: 2px;
    background: currentColor;
    border-radius: 1px;
}

/* ==========================================================================
   Search Panel
   ========================================================================== */

.search-panel {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    padding: var(--space-6) 0;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-gray-200);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease;
}

.search-panel-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    padding: 0;
    background: transparent;
    border: none;
    border-radius: var(--radius);
    color: var(--color-gray-600);
    cursor: pointer;
    flex-shrink: 0;
    transition: color 0.15s ease, background-color 0.15s ease;
}

.search-panel-close:hover {
    color: var(--color-gray-900);
    background: var(--color-gray-100);
}

.search-panel[aria-hidden="false"] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.search-form {
    display: flex;
    gap: var(--space-2);
    max-width: 600px;
    margin: 0 auto;
}

.search-input {
    flex: 1;
    padding: var(--space-3) var(--space-4);
    font-size: 1rem;
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
}

.search-input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.search-submit {
    padding: var(--space-3) var(--space-4);
    background: var(--color-primary);
    color: var(--color-white);
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
}

/* ==========================================================================
   Mobile Nav Panel
   ========================================================================== */

.mobile-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 320px;
    max-width: 100%;
    background: var(--color-white);
    box-shadow: -4px 0 24px rgba(0, 0, 0, 0.12);
    z-index: 400;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    overflow-y: auto;
}

.mobile-nav[aria-hidden="false"] {
    transform: translateX(0);
}

.mobile-nav-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4);
    border-bottom: 1px solid var(--color-gray-200);
}

.mobile-nav-title {
    font-size: 1.125rem;
    font-weight: 600;
}

.mobile-nav-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    padding: 0;
    background: transparent;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    color: var(--color-gray-700);
}

.mobile-nav-content {
    padding: var(--space-4);
}

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

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

.mobile-menu > li > a {
    display: block;
    padding: var(--space-4);
    font-weight: 500;
    color: var(--color-gray-800);
    text-decoration: none;
}

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

.mobile-menu-toggle-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: var(--space-4);
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-gray-800);
    background: none;
    border: none;
    cursor: pointer;
    text-align: left;
    transition: color 0.2s ease;
}

.mobile-menu-toggle-item:hover {
    color: var(--color-primary);
}

.mobile-submenu-chevron {
    flex-shrink: 0;
    margin-left: var(--space-2);
    transition: transform 0.25s ease;
}

.mobile-menu-item--has-children.is-open .mobile-submenu-chevron {
    transform: rotate(180deg);
}

.mobile-submenu {
    list-style: none;
    margin: 0;
    padding: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease-out;
    background: var(--color-gray-50, #f9fafb);
}

.mobile-menu-item--has-children.is-open .mobile-submenu {
    max-height: 1200px;
}

.mobile-submenu li {
    border-bottom: none;
}

.mobile-submenu li a {
    display: block;
    padding: var(--space-2) var(--space-4) var(--space-2) calc(var(--space-4) + var(--space-2));
    font-size: 0.9375rem;
    color: var(--color-gray-600);
    text-decoration: none;
    border-left: 3px solid transparent;
}

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

.mobile-submenu li:last-child a {
    padding-bottom: var(--space-3);
}