/**
 * @package     Joomla.Site
 * @subpackage  mod_megamenu
 *
 * @copyright   Copyright (C) 2025
 * @license     GNU General Public License version 2 or later
 */

/* ========================================
   CSS Variables (configured via PHP)
   ======================================== */
:root {
    --megamenu-min-height: 400px;
    --megamenu-level2-width: 200px;
    --megamenu-level3-width: 200px;
    --megamenu-grid-template: repeat(auto-fit, minmax(250px, 1fr));
    --megamenu-grid-gap: 1rem;
    --megamenu-animation-speed: 300ms;
    --megamenu-hover-delay: 200ms;
    --megamenu-tablet-breakpoint: 992px;
    --megamenu-mobile-breakpoint: 768px;
    --megamenu-tablet-grid: 1fr;
    --megamenu-mobile-grid: 1fr;
}

/* ========================================
   Module Container
   ======================================== */
.mod-megamenu {
    position: static;
    width: 100%;
}

/* ========================================
   Level 1 - Horizontal Navigation
   ======================================== */
.megamenu-nav {
    list-style: none;
    margin: 0;
    padding: 0;
}

.megamenu-level-1 {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 0;
}

.megamenu-level-1 {
    position: relative;
}

.megamenu-level-1 > .megamenu-item {
    position: static;
}

/* ========================================
   Logo Item
   ======================================== */
.megamenu-logo-item {
    margin-right: auto;
    z-index: 1001;
    position: relative;
}

.megamenu-logo-link {
    display: flex;
    align-items: center;
    padding: 1.5rem;
    text-decoration: none;
}

.megamenu-logo-image {
    display: block;
    height: auto;
    max-height: 60px;
}

/* ========================================
   Level 1 Links
   ======================================== */
.megamenu-link-level-1 {
    display: block;
    padding: 1rem 1.5rem;
    text-decoration: none;
    color: inherit;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.megamenu-link-level-1:hover,
.megamenu-item.active > .megamenu-link-level-1 {
    background-color: rgba(0, 0, 0, 0.05);
}

/* ========================================
   Megamenu Panel
   ======================================== */
.megamenu-panel {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100vw;
    margin-left: calc(-50vw + 50%);
    background: white;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition:
        opacity var(--megamenu-animation-speed) ease,
        transform var(--megamenu-animation-speed) ease,
        visibility 0s linear var(--megamenu-animation-speed);
    z-index: 1000;
    min-height: var(--megamenu-min-height);
}

/* Panel visible state - hover */
.megamenu-item.has-children:hover > .megamenu-panel,
.megamenu-panel:hover {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    transition:
        opacity var(--megamenu-animation-speed) ease,
        transform var(--megamenu-animation-speed) ease;
}

/* Panel visible state - JavaScript controlled */
.megamenu-panel.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    transition:
        opacity var(--megamenu-animation-speed) ease,
        transform var(--megamenu-animation-speed) ease;
}

.megamenu-panel-inner {
    display: grid;
    grid-template-columns: var(--megamenu-level2-width) 1fr;
    gap: var(--megamenu-grid-gap);
    padding: 2rem;
    min-height: var(--megamenu-min-height);
    position: relative;
}

/* Level 1 only (no level 2 children) - full width modules */
.megamenu-panel-inner:has(.megamenu-modules-grid-level1) {
    grid-template-columns: 1fr;
}

/* Has level 3 items - 3 column layout: level 2, level 3, modules */
.megamenu-panel-inner:has(.megamenu-level3-column) {
    grid-template-columns: var(--megamenu-level2-width) var(--megamenu-level3-width) 1fr;
}

/* ========================================
   Level 2 - Vertical Menu Column
   ======================================== */
.megamenu-level2-column {
    border-right: 1px solid rgba(0, 0, 0, 0.1);
    padding-right: var(--megamenu-grid-gap);
}

.megamenu-level-2 {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.megamenu-item-level-2 {
    position: relative;
}

.megamenu-link-level-2 {
    display: block;
    padding: 0.75rem 1rem;
    text-decoration: none;
    color: inherit;
    border-radius: 4px;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.megamenu-link-level-2:hover,
.megamenu-item-level-2.active > .megamenu-link-level-2 {
    background-color: rgba(0, 0, 0, 0.05);
}

.megamenu-item-level-2.has-modules > .megamenu-link-level-2::after {
    content: '\203A';
    float: right;
    margin-left: 0.5rem;
    font-size: 1.2em;
}

/* ========================================
   Level 3 - Vertical Menu Column
   ======================================== */
.megamenu-level3-column {
    border-right: 1px solid rgba(0, 0, 0, 0.1);
    padding-right: calc(var(--megamenu-grid-gap) * 2);
    margin-right: var(--megamenu-grid-gap);
    visibility: hidden;
    opacity: 0;
    transform: translateX(-10px);
    transition:
        opacity var(--megamenu-animation-speed) ease,
        transform var(--megamenu-animation-speed) ease,
        visibility 0s linear var(--megamenu-animation-speed);
}

.megamenu-level3-column.active {
    visibility: visible;
    opacity: 1;
    transform: translateX(0);
    transition:
        opacity var(--megamenu-animation-speed) ease,
        transform var(--megamenu-animation-speed) ease,
        visibility 0s linear 0s;
}

.megamenu-level-3 {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.megamenu-item-level-3 {
    position: relative;
}

.megamenu-link-level-3 {
    display: block;
    padding: 0.75rem 1rem;
    text-decoration: none;
    color: inherit;
    border-radius: 4px;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.megamenu-link-level-3:hover,
.megamenu-item-level-3.active > .megamenu-link-level-3 {
    background-color: rgba(0, 0, 0, 0.05);
}

.megamenu-item-level-3.has-modules > .megamenu-link-level-3::after {
    content: '\203A';
    float: right;
    margin-left: 0.5rem;
    font-size: 1.2em;
}

/* ========================================
   Module Grid Areas
   ======================================== */

/* Base styles - shared by all module grids */
.megamenu-modules-grid {
    display: grid;
    grid-template-columns: var(--megamenu-grid-template);
    gap: var(--megamenu-grid-gap);
    padding: 0;
    opacity: 0;
    transform: translateY(-10px);
    transition:
        opacity var(--megamenu-module-animation-speed) var(--megamenu-module-animation-easing),
        transform var(--megamenu-module-animation-speed) var(--megamenu-module-animation-easing);
    pointer-events: none;
}

/* Level 2 module grids - absolutely positioned to overlay each other (2-column layout) */
.megamenu-modules-grid-level2 {
    position: absolute;
    top: 0;
    left: calc(var(--megamenu-level2-width) + (var(--megamenu-grid-gap) * 2));
    right: 0;
    padding-left: calc(var(--megamenu-grid-gap) * 2);
    visibility: hidden;
    transition:
        opacity var(--megamenu-module-animation-speed) var(--megamenu-module-animation-easing),
        transform var(--megamenu-module-animation-speed) var(--megamenu-module-animation-easing),
        visibility 0s linear var(--megamenu-module-animation-speed);
}

/* Level 3 module grids - absolutely positioned to overlay each other (3-column layout) */
.megamenu-modules-grid-level3 {
    position: absolute !important;
    top: 0 !important;
    /* Positioned after level 2 (200px) + level 3 (200px) + gaps and padding */
    left: 480px !important;
    right: 0 !important;
    padding-left: 0 !important;
    visibility: hidden;
    transition:
        opacity var(--megamenu-module-animation-speed) var(--megamenu-module-animation-easing),
        transform var(--megamenu-module-animation-speed) var(--megamenu-module-animation-easing),
        visibility 0s linear var(--megamenu-module-animation-speed);
}

/* Level 1 module grids - static positioning in grid flow, inherit visibility from panel */
.megamenu-modules-grid-level1 {
    position: static;
    /* visibility: inherit - let panel control visibility */
}

/* Active state controlled by JavaScript */
.megamenu-modules-grid.active {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

/* Level 2 & 3 active grids need visibility override */
.megamenu-modules-grid-level2.active,
.megamenu-modules-grid-level3.active {
    visibility: visible;
    transition:
        opacity var(--megamenu-module-animation-speed) var(--megamenu-module-animation-easing),
        transform var(--megamenu-module-animation-speed) var(--megamenu-module-animation-easing),
        visibility 0s linear 0s;
}

.megamenu-module-area {
    background: rgba(0, 0, 0, 0.02);
    padding: 1rem;
    border-radius: 4px;
}

/* Level 3 module areas need extra left margin */
.megamenu-modules-grid-level3 .megamenu-module-area:first-child {
    margin-left: 2rem;
}

/* Module styling */
.megamenu-module-area .module {
    margin: 0;
}

.megamenu-module-area .module-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

/* ========================================
   Menu Item Images
   ======================================== */
.megamenu-link img {
    max-height: 20px;
    width: auto;
    margin-right: 0.5rem;
    vertical-align: middle;
}

/* ========================================
   Active States
   ======================================== */
.megamenu-item.active > .megamenu-link {
    font-weight: 600;
}

/* ========================================
   Responsive - Tablet
   ======================================== */
@media (max-width: 992px) {
    .megamenu-panel-inner {
        grid-template-columns: var(--megamenu-level2-width) var(--megamenu-tablet-grid);
    }

    .megamenu-modules-grid {
        grid-template-columns: var(--megamenu-tablet-grid);
    }

    .megamenu-link-level-1 {
        padding: 0.875rem 1.25rem;
        font-size: 0.95rem;
    }
}

/* ========================================
   Responsive - Mobile
   ======================================== */
@media (max-width: 768px) {
    .megamenu-level-1 {
        flex-direction: column;
        align-items: stretch;
    }

    .megamenu-panel {
        position: static;
        box-shadow: none;
        border-top: 1px solid rgba(0, 0, 0, 0.1);
        min-height: auto;
    }

    .megamenu-panel-inner {
        grid-template-columns: var(--megamenu-mobile-grid);
        padding: 1rem;
        min-height: auto;
    }

    .megamenu-level2-column {
        border-right: none;
        border-bottom: 1px solid rgba(0, 0, 0, 0.1);
        padding-right: 0;
        padding-bottom: 1rem;
        margin-bottom: 1rem;
    }

    .megamenu-modules-grid {
        grid-column: 1;
        grid-template-columns: var(--megamenu-mobile-grid);
    }

    /* Mobile: Toggle panels on click instead of hover */
    .megamenu-panel {
        display: none;
    }

    .megamenu-item.has-children.mobile-open > .megamenu-panel {
        display: block;
        opacity: 1;
        visibility: visible;
        transform: none;
    }

    .megamenu-link-level-1 {
        padding: 1rem;
    }

    /* Mobile: Show modules below level 2 items */
    .megamenu-item-level-2:hover .megamenu-modules-grid,
    .megamenu-item-level-2.mobile-open .megamenu-modules-grid {
        display: grid;
    }
}

/* ========================================
   Accessibility
   ======================================== */
.megamenu-link:focus {
    outline: 2px solid #4A90E2;
    outline-offset: 2px;
}

.megamenu-link:focus:not(:focus-visible) {
    outline: none;
}

/* ========================================
   RTL Support
   ======================================== */
[dir="rtl"] .megamenu-level2-column {
    border-right: none;
    border-left: 1px solid rgba(0, 0, 0, 0.1);
    padding-right: 0;
    padding-left: var(--megamenu-grid-gap);
}

[dir="rtl"] .megamenu-item-level-2.has-modules > .megamenu-link-level-2::after {
    content: '\2039';
    float: left;
    margin-left: 0;
    margin-right: 0.5rem;
}

[dir="rtl"] .megamenu-link img {
    margin-right: 0;
    margin-left: 0.5rem;
}

/* ========================================
   Print Styles
   ======================================== */
@media print {
    .megamenu-panel {
        display: none !important;
    }
}