/**
 * Navigation Styles
 * Your Electrics - Mega Menu & Mobile Navigation
 *
 * Mobile-first approach:
 * - Default styles are for mobile
 * - Desktop enhancements at 1024px+
 *
 * Structure:
 * 1. Header & Search Bar
 * 2. Mobile Navigation (hamburger, slide-out, accordion)
 * 3. Desktop Mega Menu (dropdown, grid layout)
 * 4. Shared Navigation Utilities
 */


/* ============================================
   1. HEADER & SEARCH BAR
   ============================================ */

/**
 * Main site header
 * Contains logo, search bar, cart icon
 */
.site-header {
    background-color: var(--white);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: var(--z-index-sticky);
}

/**
 * Header inner container
 * Flexbox layout: logo | search | cart
 */
.site-header .ast-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-md);
    max-width: var(--max-width-container);
    margin: 0 auto;
}

/**
 * Search bar styling
 * Prominent search for trade customers who search by product codes
 */
.ye-search-bar {
    flex: 1;
    max-width: 600px;
    margin: 0 var(--spacing-md);
}

.ye-search-bar input[type="search"] {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-full);
    font-family: var(--font-body);
    font-size: var(--font-size-base);
    transition: border-color var(--transition-base);
    /* Minimum 48px height for touch targets */
    min-height: 48px;
}

.ye-search-bar input[type="search"]:focus {
    outline: none;
    border-color: var(--primary-red);
}

/**
 * Cart icon with item count badge
 */
.ye-cart-icon {
    position: relative;
    display: flex;
    align-items: center;
    padding: var(--spacing-sm);
    min-width: 48px;
    min-height: 48px;
    justify-content: center;
}

.ye-cart-count {
    position: absolute;
    top: 0;
    right: 0;
    background-color: var(--primary-red);
    color: var(--white);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-bold);
    width: 20px;
    height: 20px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}


/* ============================================
   2. MOBILE NAVIGATION
   Default styles (shown below 1024px)
   ============================================ */

/**
 * Hamburger menu button
 * Three-line icon, 48px touch target
 */
.ye-hamburger {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 48px;
    height: 48px;
    padding: var(--spacing-sm);
    background: none;
    border: none;
    cursor: pointer;
    z-index: calc(var(--z-index-modal) + 1);
}

.ye-hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--dark-gray);
    margin: 3px 0;
    transition: transform var(--transition-base), opacity var(--transition-base);
}

/* Hamburger to X animation when menu is open */
.ye-hamburger.is-active span:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
}

.ye-hamburger.is-active span:nth-child(2) {
    opacity: 0;
}

.ye-hamburger.is-active span:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -4px);
}

/**
 * Mobile menu overlay backdrop
 * Semi-transparent dark background behind slide-out
 */
.ye-menu-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: var(--z-index-modal-backdrop);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.ye-menu-overlay.is-visible {
    display: block;
    opacity: 1;
}

/**
 * Mobile slide-out menu panel
 * Slides in from the left side
 */
.ye-mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 85%;
    max-width: 360px;
    height: 100vh;
    background-color: var(--white);
    z-index: var(--z-index-modal);
    transform: translateX(-100%);
    transition: transform var(--transition-base);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

.ye-mobile-menu.is-open {
    transform: translateX(0);
}

/**
 * Mobile menu header
 * Contains close button and branding
 */
.ye-mobile-menu__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.ye-mobile-menu__close {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    font-size: var(--font-size-2xl);
    cursor: pointer;
    color: var(--dark-gray);
}

/**
 * Mobile menu navigation list
 */
.ye-mobile-menu__nav {
    list-style: none;
    margin: 0;
    padding: 0;
}

.ye-mobile-menu__nav li {
    border-bottom: 1px solid var(--border-light);
}

.ye-mobile-menu__nav a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    color: var(--dark-gray);
    text-decoration: none;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    min-height: 48px;
    transition: background-color var(--transition-fast);
}

.ye-mobile-menu__nav a:hover,
.ye-mobile-menu__nav a:focus {
    background-color: var(--bg-tertiary);
}

/**
 * Mobile accordion sub-menus
 * Category items expand/collapse on tap
 */
.ye-accordion-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: none;
    border: none;
    border-left: 1px solid var(--border-light);
    cursor: pointer;
    font-size: var(--font-size-lg);
    color: var(--medium-gray);
    transition: transform var(--transition-base);
}

/* Rotate arrow when accordion is open */
.ye-accordion-toggle.is-expanded {
    transform: rotate(180deg);
}

/**
 * Accordion sub-menu content
 * Hidden by default, slides open on toggle
 */
.ye-accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
    background-color: var(--bg-secondary);
}

.ye-accordion-content.is-expanded {
    max-height: 500px; /* Enough for most sub-menus */
}

.ye-accordion-content a {
    padding-left: var(--spacing-xl);
    font-weight: var(--font-weight-normal);
    font-size: var(--font-size-sm);
}


/* ============================================
   3. DESKTOP MEGA MENU
   Only visible at 1024px and above
   ============================================ */

@media (min-width: 1024px) {

    /* Hide hamburger on desktop */
    .ye-hamburger {
        display: none;
    }

    /* Hide mobile menu on desktop */
    .ye-mobile-menu,
    .ye-menu-overlay {
        display: none;
    }

    /**
     * Main navigation bar
     * Sits below the header, contains "All Products" trigger
     */
    .ye-main-nav {
        background-color: var(--dark-gray);
        position: relative;
    }

    .ye-main-nav__container {
        display: flex;
        align-items: center;
        max-width: var(--max-width-container);
        margin: 0 auto;
        padding: 0 var(--spacing-md);
    }

    /**
     * Navigation links
     */
    .ye-main-nav__list {
        display: flex;
        list-style: none;
        margin: 0;
        padding: 0;
        width: 100%;
    }

    .ye-main-nav__list > li {
        position: relative;
    }

    .ye-main-nav__list > li > a {
        display: flex;
        align-items: center;
        padding: var(--spacing-sm) var(--spacing-md);
        color: var(--white);
        text-decoration: none;
        font-family: var(--font-body);
        font-size: var(--font-size-sm);
        font-weight: var(--font-weight-medium);
        white-space: nowrap;
        transition: background-color var(--transition-fast);
        min-height: 48px;
    }

    .ye-main-nav__list > li > a:hover,
    .ye-main-nav__list > li > a:focus {
        background-color: rgba(255, 255, 255, 0.1);
    }

    /**
     * "All Products" mega menu trigger
     * Red background to stand out as primary CTA
     */
    .ye-mega-trigger {
        background-color: var(--primary-red);
    }

    .ye-mega-trigger > a {
        font-weight: var(--font-weight-bold);
    }

    .ye-mega-trigger > a:hover,
    .ye-mega-trigger > a:focus {
        background-color: var(--red-hover);
    }

    /**
     * Mega menu dropdown panel
     * Full-width dropdown with 4-column grid
     */
    .ye-mega-menu {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100vw;
        /* Position relative to viewport left edge */
        margin-left: calc(-50vw + 50%);
        background-color: var(--white);
        border-top: 3px solid var(--primary-red);
        box-shadow: var(--shadow-xl);
        z-index: var(--z-index-dropdown);

        /* Hidden by default */
        opacity: 0;
        visibility: hidden;
        transform: translateY(-10px);
        transition:
            opacity var(--transition-base),
            visibility var(--transition-base),
            transform var(--transition-base);
    }

    /* Show mega menu on hover */
    .ye-mega-trigger:hover .ye-mega-menu,
    .ye-mega-trigger:focus-within .ye-mega-menu {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    /**
     * Mega menu inner container
     * Constrains content width and adds padding
     */
    .ye-mega-menu__inner {
        max-width: var(--max-width-container);
        margin: 0 auto;
        padding: var(--spacing-xl);
    }

    /**
     * Mega menu 4-column grid
     * Shows product categories organized by type
     */
    .ye-mega-menu__grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: var(--spacing-xl);
    }

    /**
     * Mega menu category group
     * Each column has a group heading and list of subcategories
     */
    .ye-mega-menu__group {
        padding: 0;
    }

    .ye-mega-menu__group-title {
        font-family: var(--font-heading);
        font-size: var(--font-size-sm);
        font-weight: var(--font-weight-bold);
        text-transform: uppercase;
        letter-spacing: 0.05em;
        color: var(--primary-red);
        padding-bottom: var(--spacing-sm);
        margin-bottom: var(--spacing-sm);
        border-bottom: 2px solid var(--primary-red);
    }

    .ye-mega-menu__group ul {
        list-style: none;
        margin: 0;
        padding: 0;
    }

    .ye-mega-menu__group li {
        margin-bottom: var(--spacing-xs);
    }

    .ye-mega-menu__group a {
        display: block;
        padding: var(--spacing-xs) 0;
        color: var(--dark-gray);
        text-decoration: none;
        font-size: var(--font-size-sm);
        transition: color var(--transition-fast);
    }

    .ye-mega-menu__group a:hover,
    .ye-mega-menu__group a:focus {
        color: var(--primary-red);
    }

    /**
     * "View All" link at bottom of each group
     */
    .ye-mega-menu__view-all {
        display: inline-block;
        margin-top: var(--spacing-sm);
        color: var(--primary-red);
        font-weight: var(--font-weight-semibold);
        font-size: var(--font-size-sm);
        text-decoration: none;
        transition: color var(--transition-fast);
    }

    .ye-mega-menu__view-all:hover {
        color: var(--red-hover);
    }

    .ye-mega-menu__view-all::after {
        content: ' \2192'; /* Right arrow */
    }
}


/* ============================================
   4. SHARED NAVIGATION UTILITIES
   ============================================ */

/**
 * Prevent body scroll when mobile menu is open
 */
body.ye-menu-open {
    overflow: hidden;
}

/**
 * Skip to content link (accessibility)
 * Hidden until focused via keyboard
 */
.ye-skip-link {
    position: absolute;
    top: -100%;
    left: var(--spacing-md);
    background-color: var(--primary-red);
    color: var(--white);
    padding: var(--spacing-sm) var(--spacing-md);
    z-index: var(--z-index-tooltip);
    text-decoration: none;
    font-weight: var(--font-weight-bold);
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    transition: top var(--transition-fast);
}

.ye-skip-link:focus {
    top: 0;
}

/**
 * Active/current page indicator
 */
.ye-main-nav__list > li.current-menu-item > a,
.ye-mobile-menu__nav > li.current-menu-item > a {
    color: var(--primary-red);
    font-weight: var(--font-weight-bold);
}

/**
 * Breadcrumb navigation
 * Shows path: Home > Category > Product
 */
.ye-breadcrumbs {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    color: var(--medium-gray);
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.ye-breadcrumbs a {
    color: var(--medium-gray);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.ye-breadcrumbs a:hover {
    color: var(--primary-red);
}

.ye-breadcrumbs .separator {
    margin: 0 var(--spacing-xs);
}