/**
 * ============================================================================
 * BITH MEGA MENU WIDGET - CSS
 * ============================================================================
 * 
 * Premium Mega Menu with 5 skins:
 * 1. E-commerce Grid
 * 2. Icon Top Navigation
 * 3. Vertical Tabs (Amazon Style)
 * 4. Visual Categories
 * 5. Service List
 *
 * @package Bith_Core
 * @since 1.0.0
 */

/* ============================================================================
   BASE STYLES
   ============================================================================ */

.bith-mega-menu {
    --menu-bg: var(--bith-widget-surface, #ffffff);
    --menu-text: var(--bith-widget-text-secondary, #475569);
    --menu-text-hover: var(--bith-widget-text-heading, #0f172a);
    --menu-primary: var(--bith-widget-primary, #6366f1);
    --menu-primary-light: rgba(99, 102, 241, 0.1);
    --menu-border: var(--bith-widget-border, #e2e8f0);
    --menu-shadow: var(--bith-widget-shadow-lg, 0 10px 15px -3px rgba(0, 0, 0, 0.1));
    --menu-radius: var(--bith-widget-radius-xl, 16px);
    --menu-transition: var(--bith-widget-transition-normal, 250ms ease);

    position: relative;
    font-family: var(--bith-widget-font-primary, 'Inter', sans-serif);
}

.bith-mega-menu__list {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.bith-mega-menu__item {
    position: relative;
}

.bith-mega-menu__link {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 12px 20px;
    font-size: 15px;
    font-weight: 500;
    color: var(--menu-text);
    text-decoration: none;
    border-radius: var(--bith-widget-radius-md, 12px);
    transition: all var(--menu-transition);
}

.bith-mega-menu__link:hover {
    color: var(--menu-text-hover);
    background: var(--bith-widget-bg-subtle, #f1f5f9);
}

.bith-mega-menu__chevron {
    display: flex;
    transition: transform var(--menu-transition);
}

.bith-mega-menu__item--has-dropdown:hover .bith-mega-menu__chevron,
.bith-mega-menu__item--has-dropdown.active .bith-mega-menu__chevron {
    transform: rotate(180deg);
}

/* ============================================================================
   DROPDOWN BASE STYLES
   ============================================================================ */

.bith-mega-menu__dropdown {
    position: absolute;
    top: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    background: var(--menu-bg);
    border-radius: var(--menu-radius);
    box-shadow: 0 30px 60px -15px rgba(0, 0, 0, 0.15), 0 0 0 1px rgba(0, 0, 0, 0.02);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: all var(--menu-transition);
    z-index: var(--bith-widget-z-dropdown, 10);
    overflow: hidden;
}

.bith-mega-menu__item--has-dropdown:hover .bith-mega-menu__dropdown,
.bith-mega-menu__item--has-dropdown.active .bith-mega-menu__dropdown {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0);
}

.bith-mega-menu__dropdown-inner {
    padding: 24px;
}

/* ============================================================================
   SKIN 1: E-COMMERCE GRID
   ============================================================================ */

.bith-mega-menu--skin-1 .bith-mega-menu__link:hover,
.bith-mega-menu--skin-1 .bith-mega-menu__item--has-dropdown:hover .bith-mega-menu__link {
    color: var(--menu-primary);
    background: var(--menu-primary-light);
}

.bith-mega-menu__dropdown--skin-1 {
    width: 100vw;
    max-width: 1100px;
}

.bith-mega-menu__grid--ecommerce {
    display: grid;
    grid-template-columns: repeat(4, 1fr) 280px;
    gap: 32px;
}

.bith-mega-menu__col-title {
    margin: 0 0 16px;
    padding-bottom: 12px;
    font-size: 14px;
    font-weight: 600;
    color: var(--bith-widget-text-heading, #0f172a);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 2px solid var(--bith-widget-bg-subtle, #f1f5f9);
}

.bith-mega-menu__col-links {
    margin: 0;
    padding: 0;
    list-style: none;
}

.bith-mega-menu__col-links li {
    margin-bottom: 8px;
}

.bith-mega-menu__col-links a {
    display: block;
    padding: 8px 0;
    font-size: 14px;
    color: var(--bith-widget-text-secondary, #475569);
    text-decoration: none;
    transition: all var(--menu-transition);
    position: relative;
}

.bith-mega-menu__col-links a::before {
    content: '';
    position: absolute;
    left: -12px;
    top: 50%;
    width: 4px;
    height: 4px;
    background: var(--menu-primary);
    border-radius: 50%;
    opacity: 0;
    transform: translateY(-50%) scale(0);
    transition: all var(--menu-transition);
}

.bith-mega-menu__col-links a:hover {
    color: var(--menu-primary);
    transform: translateX(8px);
}

.bith-mega-menu__col-links a:hover::before {
    opacity: 1;
    transform: translateY(-50%) scale(1);
}

/* Featured Column */
.bith-mega-menu__col--featured {
    border-left: 1px solid var(--bith-widget-bg-subtle, #f1f5f9);
    padding-left: 32px;
}

.bith-mega-menu__featured-card {
    position: relative;
    border-radius: var(--bith-widget-radius-lg, 16px);
    overflow: hidden;
    height: 100%;
    min-height: 280px;
}

.bith-mega-menu__featured-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.bith-mega-menu__featured-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    padding: 6px 14px;
    background: var(--bith-widget-error, #ef4444);
    color: #fff;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-radius: var(--bith-widget-radius-full, 9999px);
    z-index: 2;
}

.bith-mega-menu__featured-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 24px;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8) 0%, transparent 100%);
    color: #fff;
}

.bith-mega-menu__featured-discount {
    display: inline-block;
    font-size: 28px;
    font-weight: 800;
    margin-bottom: 4px;
}

.bith-mega-menu__featured-content h5 {
    margin: 0 0 12px;
    font-size: 16px;
    font-weight: 600;
}

.bith-mega-menu__featured-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: #fff;
    color: var(--bith-widget-text-heading, #0f172a);
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--bith-widget-radius-full, 9999px);
    transition: all var(--menu-transition);
}

.bith-mega-menu__featured-btn:hover {
    background: var(--menu-primary);
    color: #fff;
    transform: translateY(-2px);
}

/* ============================================================================
   SKIN 2: ICON TOP NAVIGATION
   ============================================================================ */

.bith-mega-menu--skin-2 {
    --menu-bg: linear-gradient(135deg, #fafafa 0%, #f0f0f5 100%);
}

.bith-mega-menu--skin-2 .bith-mega-menu__list {
    gap: 16px;
}

.bith-mega-menu--skin-2 .bith-mega-menu__link {
    flex-direction: column;
    padding: 16px 24px;
    gap: 8px;
}

.bith-mega-menu__link-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--menu-bg);
    border-radius: var(--bith-widget-radius-lg, 16px);
    box-shadow: var(--bith-widget-shadow-md, 0 4px 6px -1px rgba(0, 0, 0, 0.1));
    transition: all var(--menu-transition);
}

.bith-mega-menu__link-icon i,
.bith-mega-menu__link-icon svg {
    width: 24px;
    height: 24px;
    color: var(--bith-widget-text-secondary, #475569);
    transition: color var(--menu-transition);
}

.bith-mega-menu--skin-2 .bith-mega-menu__link:hover .bith-mega-menu__link-icon {
    background: var(--bith-widget-gradient-duo, linear-gradient(135deg, #4FD1C5 0%, #6366F1 100%));
    box-shadow: 0 8px 20px -6px rgba(99, 102, 241, 0.5);
    transform: translateY(-3px);
}

.bith-mega-menu--skin-2 .bith-mega-menu__link:hover .bith-mega-menu__link-icon i,
.bith-mega-menu--skin-2 .bith-mega-menu__link:hover .bith-mega-menu__link-icon svg {
    color: #fff;
}

.bith-mega-menu--skin-2 .bith-mega-menu__link-text {
    font-size: 13px;
    font-weight: 500;
}

/* Icon Dropdown Grid */
.bith-mega-menu__dropdown--skin-2 {
    min-width: 540px;
}

.bith-mega-menu__grid--icons {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

.bith-mega-menu__icon-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 24px 16px;
    background: var(--bith-widget-bg-subtle, #f1f5f9);
    border-radius: var(--bith-widget-radius-lg, 16px);
    text-decoration: none;
    transition: all var(--menu-transition);
}

.bith-mega-menu__icon-card:hover {
    background: #fff;
    box-shadow: var(--bith-widget-shadow-lg, 0 10px 15px -3px rgba(0, 0, 0, 0.1));
    transform: translateY(-4px);
}

.bith-mega-menu__icon-card-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--bith-widget-radius-lg, 16px);
    margin-bottom: 12px;
}

.bith-mega-menu__icon-card-icon i,
.bith-mega-menu__icon-card-icon svg {
    width: 28px;
    height: 28px;
    color: #fff;
}

.bith-mega-menu__icon-card-icon.blue {
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
}

.bith-mega-menu__icon-card-icon.purple {
    background: linear-gradient(135deg, #a855f7 0%, #9333ea 100%);
}

.bith-mega-menu__icon-card-icon.green {
    background: linear-gradient(135deg, #22c55e 0%, #16a34a 100%);
}

.bith-mega-menu__icon-card-icon.orange {
    background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
}

.bith-mega-menu__icon-card-icon.pink {
    background: linear-gradient(135deg, #ec4899 0%, #db2777 100%);
}

.bith-mega-menu__icon-card-icon.cyan {
    background: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
}

.bith-mega-menu__icon-card-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--bith-widget-text-heading, #0f172a);
    margin-bottom: 4px;
}

.bith-mega-menu__icon-card-desc {
    font-size: 12px;
    color: var(--bith-widget-text-muted, #94a3b8);
}

/* ============================================================================
   SKIN 3: VERTICAL TABS (AMAZON STYLE)
   ============================================================================ */

.bith-mega-menu--skin-3 {
    background: linear-gradient(135deg, #232f3e 0%, #37475a 100%);
}

.bith-mega-menu--skin-3 .bith-mega-menu__link {
    color: rgba(255, 255, 255, 0.9);
}

.bith-mega-menu--skin-3 .bith-mega-menu__link:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.1);
}

.bith-mega-menu__dropdown--skin-3 {
    width: 800px;
    left: 0;
    transform: translateX(0) translateY(10px);
}

.bith-mega-menu__item--has-dropdown:hover .bith-mega-menu__dropdown--skin-3 {
    transform: translateX(0) translateY(0);
}

.bith-mega-menu__dropdown--skin-3 .bith-mega-menu__dropdown-inner {
    padding: 0;
}

.bith-mega-menu__vtabs {
    display: flex;
    min-height: 360px;
}

.bith-mega-menu__vtabs-sidebar {
    width: 200px;
    background: var(--bith-widget-bg-subtle, #f1f5f9);
    padding: 12px 0;
    flex-shrink: 0;
    margin: 0;
    list-style: none;
}

.bith-mega-menu__vtab-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 20px;
    cursor: pointer;
    color: var(--bith-widget-text-secondary, #475569);
    transition: all var(--menu-transition);
    position: relative;
}

.bith-mega-menu__vtab-item i,
.bith-mega-menu__vtab-item svg {
    width: 20px;
    height: 20px;
}

.bith-mega-menu__vtab-item span {
    flex: 1;
    font-size: 14px;
    font-weight: 500;
}

.bith-mega-menu__vtab-arrow {
    width: 16px;
    height: 16px;
    opacity: 0;
    transition: all var(--menu-transition);
}

.bith-mega-menu__vtab-item:hover,
.bith-mega-menu__vtab-item.active {
    background: #fff;
    color: var(--bith-widget-text-heading, #0f172a);
}

.bith-mega-menu__vtab-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--menu-primary);
}

.bith-mega-menu__vtab-item:hover .bith-mega-menu__vtab-arrow,
.bith-mega-menu__vtab-item.active .bith-mega-menu__vtab-arrow {
    opacity: 1;
}

/* Vertical Tab Content */
.bith-mega-menu__vtabs-content {
    flex: 1;
    padding: 24px;
    position: relative;
}

.bith-mega-menu__vtab-panel {
    display: none;
    animation: bithFadeIn 0.3s ease;
}

.bith-mega-menu__vtab-panel.active {
    display: block;
}

@keyframes bithFadeIn {
    from {
        opacity: 0;
        transform: translateX(10px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.bith-mega-menu__vtab-grid {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 32px;
}

.bith-mega-menu__vtab-col h4 {
    margin: 0 0 16px;
    padding-bottom: 10px;
    font-size: 14px;
    font-weight: 600;
    color: var(--bith-widget-text-heading, #0f172a);
    border-bottom: 2px solid var(--bith-widget-bg-subtle, #f1f5f9);
}

.bith-mega-menu__vtab-featured {
    border-radius: var(--bith-widget-radius-lg, 16px);
    overflow: hidden;
    position: relative;
    width: 140px;
    height: 140px;
}

.bith-mega-menu__vtab-featured img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.bith-mega-menu__vtab-featured span {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 10px;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
}

/* ============================================================================
   SKIN 4: VISUAL CATEGORIES
   ============================================================================ */

.bith-mega-menu__dropdown--skin-4 {
    width: 100vw;
    max-width: 1000px;
}

.bith-mega-menu__grid--visual {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 16px;
}

.bith-mega-menu__visual-card {
    position: relative;
    aspect-ratio: 1;
    border-radius: var(--bith-widget-radius-lg, 16px);
    overflow: hidden;
    cursor: pointer;
    text-decoration: none;
}

.bith-mega-menu__visual-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.bith-mega-menu__visual-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.7) 0%, rgba(0, 0, 0, 0.1) 50%, transparent 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 16px;
    transition: all var(--menu-transition);
}

.bith-mega-menu__visual-title {
    font-size: 16px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 2px;
}

.bith-mega-menu__visual-count {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.75);
}

.bith-mega-menu__visual-card:hover img {
    transform: scale(1.1);
}

.bith-mega-menu__visual-card:hover .bith-mega-menu__visual-overlay {
    background: linear-gradient(to top, rgba(99, 102, 241, 0.9) 0%, rgba(168, 85, 247, 0.6) 50%, transparent 100%);
}

/* ============================================================================
   SKIN 5: SERVICE LIST WITH DESCRIPTION
   ============================================================================ */

.bith-mega-menu__dropdown--skin-5 {
    width: 700px;
}

.bith-mega-menu__dropdown--skin-5 .bith-mega-menu__dropdown-inner {
    padding: 0;
}

.bith-mega-menu__grid--services {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 4px;
    padding: 16px;
}

.bith-mega-menu__service-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 20px;
    border-radius: var(--bith-widget-radius-lg, 16px);
    text-decoration: none;
    transition: all var(--menu-transition);
}

.bith-mega-menu__service-item:hover {
    background: var(--bith-widget-bg-subtle, #f1f5f9);
}

.bith-mega-menu__service-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--bith-widget-radius-md, 12px);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.bith-mega-menu__service-icon i,
.bith-mega-menu__service-icon svg {
    width: 24px;
    height: 24px;
    color: #fff;
}

.bith-mega-menu__service-icon.blue {
    background: linear-gradient(135deg, #60a5fa, #3b82f6);
}

.bith-mega-menu__service-icon.purple {
    background: linear-gradient(135deg, #c084fc, #a855f7);
}

.bith-mega-menu__service-icon.green {
    background: linear-gradient(135deg, #4ade80, #22c55e);
}

.bith-mega-menu__service-icon.orange {
    background: linear-gradient(135deg, #fb923c, #f97316);
}

.bith-mega-menu__service-icon.pink {
    background: linear-gradient(135deg, #f472b6, #ec4899);
}

.bith-mega-menu__service-icon.cyan {
    background: linear-gradient(135deg, #22d3ee, #06b6d4);
}

.bith-mega-menu__service-content {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.bith-mega-menu__service-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--bith-widget-text-heading, #0f172a);
}

.bith-mega-menu__service-desc {
    font-size: 13px;
    color: var(--bith-widget-text-muted, #94a3b8);
    line-height: 1.4;
}

.bith-mega-menu__service-footer {
    padding: 16px 20px;
    background: var(--bith-widget-bg-subtle, #f1f5f9);
    border-top: 1px solid var(--menu-border);
}

.bith-mega-menu__service-cta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.bith-mega-menu__service-cta span {
    font-size: 14px;
    color: var(--bith-widget-text-secondary, #475569);
}

.bith-mega-menu__service-cta a {
    font-size: 14px;
    font-weight: 600;
    color: var(--menu-primary);
    text-decoration: none;
    transition: color var(--menu-transition);
}

.bith-mega-menu__service-cta a:hover {
    color: var(--bith-widget-primary-hover, #4f46e5);
}

/* ============================================================================
   RESPONSIVE STYLES
   ============================================================================ */

@media (max-width: 1200px) {
    .bith-mega-menu__grid--ecommerce {
        grid-template-columns: repeat(3, 1fr);
    }

    .bith-mega-menu__col--featured {
        grid-column: span 3;
        border-left: none;
        padding-left: 0;
        padding-top: 24px;
        border-top: 1px solid var(--bith-widget-bg-subtle, #f1f5f9);
    }

    .bith-mega-menu__featured-card {
        min-height: 200px;
    }
}

@media (max-width: 992px) {
    .bith-mega-menu__dropdown {
        width: 95vw !important;
        max-width: none;
    }

    .bith-mega-menu__vtabs {
        flex-direction: column;
    }

    .bith-mega-menu__vtabs-sidebar {
        width: 100%;
        display: flex;
        overflow-x: auto;
        padding: 8px;
        gap: 4px;
    }

    .bith-mega-menu__vtab-item {
        flex-shrink: 0;
        padding: 10px 16px;
    }

    .bith-mega-menu__vtab-arrow {
        display: none;
    }

    .bith-mega-menu__grid--visual {
        grid-template-columns: repeat(3, 1fr);
    }

    .bith-mega-menu__grid--services {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .bith-mega-menu__list {
        flex-direction: column;
        align-items: stretch;
    }

    .bith-mega-menu__dropdown {
        position: static;
        transform: none !important;
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
        box-shadow: none;
        border-radius: 0;
        display: none;
    }

    .bith-mega-menu__item--has-dropdown.active .bith-mega-menu__dropdown {
        display: block;
    }

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

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

/* ============================================================================
   ACCESSIBILITY & MOTION PREFERENCES
   ============================================================================ */

@media (prefers-reduced-motion: reduce) {

    .bith-mega-menu,
    .bith-mega-menu * {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}

.bith-mega-menu__link:focus-visible,
.bith-mega-menu__icon-card:focus-visible,
.bith-mega-menu__service-item:focus-visible,
.bith-mega-menu__visual-card:focus-visible {
    outline: 2px solid var(--menu-primary);
    outline-offset: 2px;
}