/* ==========================================================================
   Fluent Design Mega Menu - Microsoft Fluent UI Components
   Modern dropdown menu with Fluent Design System
   ========================================================================== */

/* Fluent Design Tokens */
:root {
    --fluent-shadow-depth-4: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 1px rgba(0, 0, 0, 0.14);
    --fluent-shadow-depth-8: 0 3px 6px rgba(0, 0, 0, 0.16), 0 3px 6px rgba(0, 0, 0, 0.23);
    --fluent-shadow-depth-16: 0 10px 20px rgba(0, 0, 0, 0.19), 0 6px 6px rgba(0, 0, 0, 0.23);

    --fluent-color-neutral-background-1: #ffffff;
    --fluent-color-neutral-background-2: #fafafa;
    --fluent-color-neutral-foreground-1: #242424;
    --fluent-color-neutral-foreground-2: #424242;
    --fluent-color-neutral-foreground-3: #616161;
    --fluent-color-brand-background-1: #0078d4;
    --fluent-color-brand-foreground-1: #0078d4;
    --fluent-color-brand-foreground-1-hover: #106ebe;
    --fluent-color-status-success-foreground-1: #107c10;
    --fluent-color-status-warning-foreground-1: #d13438;

    --fluent-border-radius-none: 0;
    --fluent-border-radius-small: 2px;
    --fluent-border-radius-medium: 4px;
    --fluent-border-radius-large: 6px;
    --fluent-border-radius-x-large: 8px;
    --fluent-border-radius-circular: 9999px;

    --fluent-font-family-base: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', sans-serif;
    --fluent-font-size-base-200: 12px;
    --fluent-font-size-base-300: 14px;
    --fluent-font-size-base-400: 16px;
    --fluent-font-size-base-500: 20px;
    --fluent-font-size-base-600: 24px;

    --fluent-line-height-base-200: 16px;
    --fluent-line-height-base-300: 20px;
    --fluent-line-height-base-400: 22px;
    --fluent-line-height-base-500: 28px;
    --fluent-line-height-base-600: 32px;

    --fluent-font-weight-regular: 400;
    --fluent-font-weight-semibold: 600;

    --fluent-spacing-horizontal-xs: 4px;
    --fluent-spacing-horizontal-s: 8px;
    --fluent-spacing-horizontal-m: 12px;
    --fluent-spacing-horizontal-l: 16px;
    --fluent-spacing-horizontal-xl: 20px;
    --fluent-spacing-horizontal-xxl: 24px;
    --fluent-spacing-horizontal-xxxl: 32px;
}

/* Base Kinguin Mega Menu Styles - Fluent Design */
.kinguin-mega-menu {
    position: absolute;
    top: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    width: 100vw;
    max-width: 1200px;
    background: var(--fluent-color-neutral-background-1);
    border-radius: var(--fluent-border-radius-large);
    box-shadow: var(--fluent-shadow-depth-16);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 9999;
    margin-top: 0.5rem;
    overflow: hidden;
    transform-origin: top center;
    border: 1px solid rgba(0, 0, 0, 0.08);
}

.modern-nav-dropdown:hover .kinguin-mega-menu,
.kinguin-mega-menu.kinguin-mega-menu--open {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) scale(1);
}

/* Mega Menu Content Layout */
.kinguin-mega-content {
    display: grid;
    grid-template-columns: 320px 1fr;
    min-height: 480px;
}

/* Sidebar Styles */
.kinguin-mega-sidebar {
    background: var(--fluent-color-neutral-background-2);
    border-right: 1px solid rgba(0, 0, 0, 0.08);
    padding: 0;
    display: flex;
    flex-direction: column;
}

.kinguin-mega-sidebar-header {
    padding: var(--fluent-spacing-horizontal-xxl) var(--fluent-spacing-horizontal-xxl) var(--fluent-spacing-horizontal-l);
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    background: var(--fluent-color-neutral-background-1);
}

.kinguin-mega-sidebar-title {
    font-family: var(--fluent-font-family-base);
    font-size: var(--fluent-font-size-base-500);
    font-weight: var(--fluent-font-weight-semibold);
    color: var(--fluent-color-neutral-foreground-1);
    margin: 0;
    line-height: var(--fluent-line-height-base-500);
}

/* Category Navigation */
.kinguin-mega-categories {
    padding: var(--fluent-spacing-horizontal-l) 0;
    flex: 1;
}

.kinguin-mega-category {
    display: flex;
    align-items: center;
    padding: var(--fluent-spacing-horizontal-m) var(--fluent-spacing-horizontal-xxl);
    color: var(--fluent-color-neutral-foreground-2);
    text-decoration: none;
    font-weight: var(--fluent-font-weight-regular);
    font-size: var(--fluent-font-size-base-300);
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    border-left: 3px solid transparent;
    position: relative;
    cursor: pointer;
    border-radius: 0 var(--fluent-border-radius-medium) var(--fluent-border-radius-medium) 0;
    margin: 0 var(--fluent-spacing-horizontal-s);
}

.kinguin-mega-category:hover,
.kinguin-mega-category.kinguin-mega-category--active,
.kinguin-mega-category:focus {
    background: var(--fluent-color-neutral-background-1);
    color: var(--fluent-color-brand-foreground-1);
    border-left-color: var(--fluent-color-brand-background-1);
    box-shadow: var(--fluent-shadow-depth-4);
    text-decoration: none;
    outline: 2px solid var(--fluent-color-brand-background-1);
    outline-offset: -2px;
}

.kinguin-mega-category:focus {
    box-shadow: var(--fluent-shadow-depth-4), 0 0 0 2px var(--fluent-color-brand-background-1);
}

.kinguin-mega-category-content {
    display: flex;
    align-items: center;
    gap: var(--fluent-spacing-horizontal-m);
    width: 100%;
}

.kinguin-mega-category-icon {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--fluent-color-brand-foreground-1);
    transition: transform 0.2s ease;
}

.kinguin-mega-category:hover .kinguin-mega-category-icon,
.kinguin-mega-category.kinguin-mega-category--active .kinguin-mega-category-icon {
    transform: scale(1.1);
}

.kinguin-mega-category-text {
    font-weight: var(--fluent-font-weight-semibold);
    margin-left: var(--fluent-spacing-horizontal-s);
}

/* Help Section */
.kinguin-mega-help {
    background: linear-gradient(135deg, var(--fluent-color-brand-background-1), var(--fluent-color-brand-foreground-1-hover));
    color: var(--fluent-color-neutral-background-1);
    border-radius: var(--fluent-border-radius-large);
    padding: var(--fluent-spacing-horizontal-l);
    margin: var(--fluent-spacing-horizontal-xxl);
    margin-top: 0;
    text-align: center;
}

.kinguin-mega-help-title {
    font-size: var(--fluent-font-size-base-400);
    font-weight: var(--fluent-font-weight-semibold);
    margin: 0 0 var(--fluent-spacing-horizontal-s);
}

.kinguin-mega-help-text {
    font-size: var(--fluent-font-size-base-200);
    margin: 0 0 var(--fluent-spacing-horizontal-l);
    opacity: 0.9;
}

.kinguin-mega-help-actions {
    display: flex;
    gap: var(--fluent-spacing-horizontal-m);
    justify-content: center;
}

.kinguin-mega-help-link {
    display: flex;
    align-items: center;
    gap: var(--fluent-spacing-horizontal-s);
    padding: var(--fluent-spacing-horizontal-s) var(--fluent-spacing-horizontal-l);
    background: rgba(255, 255, 255, 0.2);
    color: var(--fluent-color-neutral-background-1);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--fluent-border-radius-medium);
    text-decoration: none;
    font-size: var(--fluent-font-size-base-300);
    font-weight: var(--fluent-font-weight-semibold);
    transition: all 0.2s ease;
    backdrop-filter: blur(10px);
}

.kinguin-mega-help-link:hover,
.kinguin-mega-help-link:focus {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-1px);
    text-decoration: none;
    outline: 2px solid rgba(255, 255, 255, 0.8);
    outline-offset: 2px;
}

/* Main Content Area */
.kinguin-mega-main {
    padding: var(--fluent-spacing-horizontal-xxl);
    background: var(--fluent-color-neutral-background-1);
    display: flex;
    flex-direction: column;
}

.kinguin-mega-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--fluent-spacing-horizontal-xxl);
}

.kinguin-mega-header-content {
    flex: 1;
}

.kinguin-mega-title {
    font-family: var(--fluent-font-family-base);
    font-size: var(--fluent-font-size-base-500);
    font-weight: var(--fluent-font-weight-semibold);
    color: var(--fluent-color-neutral-foreground-1);
    margin: 0 0 var(--fluent-spacing-horizontal-s);
    line-height: var(--fluent-line-height-base-500);
}

.kinguin-mega-subtitle {
    color: var(--fluent-color-neutral-foreground-3);
    font-size: var(--fluent-font-size-base-300);
    margin: 0;
    line-height: var(--fluent-line-height-base-300);
}

/* Loading Spinner */
.kinguin-mega-loading {
    display: none;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
}

.fluent-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid rgba(0, 120, 212, 0.2);
    border-top: 3px solid var(--fluent-color-brand-background-1);
    border-radius: 50%;
    animation: fluent-spin 1s linear infinite;
}

@keyframes fluent-spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Products Grid */
.kinguin-mega-products {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--fluent-spacing-horizontal-l);
    flex: 1;
}

.kinguin-mega-product {
    background: var(--fluent-color-neutral-background-1);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: var(--fluent-border-radius-large);
    padding: var(--fluent-spacing-horizontal-l);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    cursor: pointer;
    animation: fluent-fade-in-up 0.4s cubic-bezier(0.4, 0, 0.2, 1) both;
}

.kinguin-mega-product:hover,
.kinguin-mega-product:focus {
    border-color: var(--fluent-color-brand-background-1);
    box-shadow: var(--fluent-shadow-depth-8);
    transform: translateY(-4px);
    outline: 2px solid var(--fluent-color-brand-background-1);
    outline-offset: -2px;
}

.kinguin-mega-product-content {
    display: flex;
    align-items: flex-start;
    gap: var(--fluent-spacing-horizontal-l);
}

.kinguin-mega-product-icon {
    width: 56px;
    height: 56px;
    background: var(--fluent-color-brand-background-1);
    border-radius: var(--fluent-border-radius-large);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: var(--fluent-color-neutral-background-1);
    font-weight: var(--fluent-font-weight-semibold);
    font-size: var(--fluent-font-size-base-400);
}

.kinguin-mega-product-details {
    flex: 1;
    min-width: 0;
}

.kinguin-mega-product-title {
    font-size: var(--fluent-font-size-base-400);
    font-weight: var(--fluent-font-weight-semibold);
    color: var(--fluent-color-neutral-foreground-1);
    margin: 0 0 var(--fluent-spacing-horizontal-s);
    line-height: var(--fluent-line-height-base-400);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.kinguin-mega-product-subtitle {
    font-size: var(--fluent-font-size-base-300);
    color: var(--fluent-color-neutral-foreground-3);
    margin: 0 0 var(--fluent-spacing-horizontal-l);
    line-height: var(--fluent-line-height-base-300);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.kinguin-mega-product-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--fluent-spacing-horizontal-m);
}

.kinguin-mega-product-price {
    font-size: var(--fluent-font-size-base-400);
    font-weight: var(--fluent-font-weight-semibold);
    color: var(--fluent-color-brand-foreground-1);
}

.kinguin-mega-product-status {
    font-size: var(--fluent-font-size-base-200);
    font-weight: var(--fluent-font-weight-semibold);
    padding: var(--fluent-spacing-horizontal-xs) var(--fluent-spacing-horizontal-s);
    border-radius: var(--fluent-border-radius-small);
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.kinguin-mega-product-status--available {
    color: var(--fluent-color-status-success-foreground-1);
    background: rgba(16, 124, 16, 0.1);
}

.kinguin-mega-product-status--unavailable {
    color: var(--fluent-color-status-warning-foreground-1);
    background: rgba(209, 52, 56, 0.1);
}

/* Footer */
.kinguin-mega-footer {
    border-top: 1px solid rgba(0, 0, 0, 0.08);
    background: var(--fluent-color-neutral-background-2);
    padding: var(--fluent-spacing-horizontal-xxl);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.kinguin-mega-stats {
    color: var(--fluent-color-neutral-foreground-3);
    font-size: var(--fluent-font-size-base-300);
}

.kinguin-mega-stats strong {
    color: var(--fluent-color-neutral-foreground-1);
    font-weight: var(--fluent-font-weight-semibold);
}

.kinguin-mega-view-all {
    display: flex;
    align-items: center;
    gap: var(--fluent-spacing-horizontal-s);
    color: var(--fluent-color-brand-foreground-1);
    font-weight: var(--fluent-font-weight-semibold);
    text-decoration: none;
    transition: all 0.2s ease;
    padding: var(--fluent-spacing-horizontal-s) var(--fluent-spacing-horizontal-l);
    border-radius: var(--fluent-border-radius-medium);
}

.kinguin-mega-view-all:hover,
.kinguin-mega-view-all:focus {
    color: var(--fluent-color-brand-foreground-1-hover);
    text-decoration: none;
    background: rgba(0, 120, 212, 0.05);
    outline: 2px solid var(--fluent-color-brand-background-1);
    outline-offset: 2px;
}

.fluent-chevron-icon {
    width: 16px;
    height: 16px;
    transition: transform 0.2s ease;
}

.kinguin-mega-view-all:hover .fluent-chevron-icon {
    transform: translateX(2px);
}

/* Error and Empty States */
.kinguin-mega-error,
.kinguin-mega-empty {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--fluent-spacing-horizontal-xxl);
    color: var(--fluent-color-neutral-foreground-3);
    font-style: italic;
}

.kinguin-mega-error .fluent-error-icon,
.kinguin-mega-empty .fluent-empty-icon {
    font-size: 48px;
    color: var(--fluent-color-neutral-foreground-3);
    margin-bottom: var(--fluent-spacing-horizontal-l);
    opacity: 0.5;
}

.kinguin-mega-error h4,
.kinguin-mega-empty h4 {
    color: var(--fluent-color-neutral-foreground-1);
    font-weight: var(--fluent-font-weight-semibold);
    margin: 0 0 var(--fluent-spacing-horizontal-s);
    font-size: var(--fluent-font-size-base-400);
}

.kinguin-mega-error p,
.kinguin-mega-empty p {
    margin: 0;
    font-size: var(--fluent-font-size-base-300);
}

/* Animations */
@keyframes fluent-fade-in-up {
    from {
        opacity: 0;
        transform: translateY(15px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive Design */
@media (max-width: 1024px) {
    .kinguin-mega-menu {
        max-width: 95vw;
        left: 2.5vw;
        transform: translateX(0) scale(0.95);
    }

    .modern-nav-dropdown:hover .kinguin-mega-menu {
        transform: translateX(0) scale(1);
    }

    .kinguin-mega-sidebar {
        width: 280px;
    }

    .kinguin-mega-products {
        grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
        gap: var(--fluent-spacing-horizontal-m);
    }
}

@media (max-width: 768px) {
    .kinguin-mega-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        max-width: none;
        border-radius: 0;
        height: calc(100vh - 70px);
        overflow-y: auto;
        transform: translateX(0) scale(1);
        margin-top: 0;
    }

    .kinguin-mega-content {
        grid-template-columns: 1fr;
        min-height: auto;
    }

    .kinguin-mega-sidebar {
        border-right: none;
        border-bottom: 1px solid rgba(0, 0, 0, 0.08);
        padding: var(--fluent-spacing-horizontal-l);
    }

    .kinguin-mega-categories {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: var(--fluent-spacing-horizontal-s);
    }

    .kinguin-mega-category {
        margin: 0;
        padding: var(--fluent-spacing-horizontal-m);
        flex-direction: column;
        text-align: center;
    }

    .kinguin-mega-category-content {
        flex-direction: column;
        gap: var(--fluent-spacing-horizontal-s);
    }

    .kinguin-mega-category-text {
        margin-left: 0;
        font-size: var(--fluent-font-size-base-200);
    }

    .kinguin-mega-products {
        grid-template-columns: 1fr;
        gap: var(--fluent-spacing-horizontal-m);
    }

    .kinguin-mega-help {
        margin: var(--fluent-spacing-horizontal-l);
        margin-top: 0;
    }

    .kinguin-mega-help-actions {
        flex-direction: column;
    }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    .kinguin-mega-menu {
        border: 2px solid;
    }

    .kinguin-mega-category:hover,
    .kinguin-mega-category.kinguin-mega-category--active {
        border-left-width: 4px;
    }

    .kinguin-mega-product:hover,
    .kinguin-mega-product:focus {
        border-width: 2px;
    }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    .kinguin-mega-menu,
    .kinguin-mega-category,
    .kinguin-mega-product,
    .kinguin-mega-help-link,
    .kinguin-mega-view-all,
    .fluent-spinner,
    .fluent-category-icon,
    .fluent-chevron-icon {
        animation: none;
        transition: none;
    }
}

/* Focus Management */
.kinguin-mega-menu:focus-within {
    outline: 2px solid var(--fluent-color-brand-background-1);
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    .kinguin-mega-menu {
        display: none;
    }
}