/* ==========================================================================
   ATX Solutions - Mobile Navigation Styles
   Navigation patterns and components optimized for mobile devices
   ========================================================================== */

/* ==========================================================================
   Hamburger Menu Button
   ========================================================================== */

@media (max-width: 767px) {
    .mobile-hamburger {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        min-width: var(--mobile-touch-target-min);
        min-height: var(--mobile-touch-target-min);
        padding: var(--mobile-touch-padding-sm);
        border: none;
        background: transparent;
        cursor: pointer;
        position: relative;
        z-index: 1050;
        margin-right: 0.5rem;
    }
    
    .mobile-hamburger:hover,
    .mobile-hamburger:focus {
        background: rgba(255, 255, 255, 0.1);
        border-radius: var(--mobile-radius-sm);
        outline: none;
    }
    
    /* Hamburger icon (three lines) */
    .mobile-hamburger-icon {
        display: block;
        width: 24px;
        height: 2px;
        background-color: currentColor;
        position: relative;
        transition: background-color var(--mobile-transition-base) ease;
    }
    
    .mobile-hamburger-icon::before,
    .mobile-hamburger-icon::after {
        content: '';
        display: block;
        width: 24px;
        height: 2px;
        background-color: currentColor;
        position: absolute;
        left: 0;
        transition: transform var(--mobile-transition-base) ease;
    }
    
    .mobile-hamburger-icon::before {
        top: -8px;
    }
    
    .mobile-hamburger-icon::after {
        bottom: -8px;
    }
    
    /* Animated hamburger to X */
    .mobile-hamburger[aria-expanded="true"] .mobile-hamburger-icon {
        background-color: transparent;
    }
    
    .mobile-hamburger[aria-expanded="true"] .mobile-hamburger-icon::before {
        transform: rotate(45deg) translateY(0);
        top: 0;
    }
    
    .mobile-hamburger[aria-expanded="true"] .mobile-hamburger-icon::after {
        transform: rotate(-45deg) translateY(0);
        bottom: 0;
    }
}

/* ==========================================================================
   Top Navigation Bar (Mobile)
   ========================================================================== */

@media (max-width: 767px) {
    .navbar {
        padding: var(--mobile-space-sm) var(--mobile-space-md);
        min-height: 60px;
    }
    
    /* Fixed navbar respects safe area */
    .navbar.fixed-top {
        padding-top: max(var(--mobile-space-sm), var(--mobile-safe-area-top));
    }
    
    /* Navbar brand */
    .navbar-brand {
        font-size: var(--mobile-font-lg);
        padding: 0;
        margin-right: auto;
    }
    
    .navbar-brand img {
        height: 32px;
        width: auto;
    }
    
    /* Navbar toggler */
    .navbar-toggler {
        min-width: var(--mobile-touch-target-min);
        min-height: var(--mobile-touch-target-min);
        padding: var(--mobile-touch-padding-sm);
        border: none;
    }
    
    .navbar-toggler:focus {
        box-shadow: none;
        outline: 2px solid var(--bs-primary);
        outline-offset: 2px;
    }
    
    /* Navbar collapse (mobile menu) */
    .navbar-collapse {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        box-shadow: var(--mobile-shadow-lg);
        max-height: calc(100vh - 60px);
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    .navbar-nav {
        padding: var(--mobile-space-sm) 0;
    }
    
    .navbar-nav .nav-link {
        min-height: var(--mobile-touch-target-min);
        padding: var(--mobile-touch-padding) var(--mobile-space-md);
        font-size: var(--mobile-font-base);
        display: flex;
        align-items: center;
        border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    }
    
    .navbar-nav .nav-link:active {
        background-color: rgba(0, 0, 0, 0.05);
    }
    
    /* Dropdown in navbar */
    .navbar-nav .dropdown-menu {
        position: static;
        float: none;
        width: 100%;
        margin: 0;
        border: none;
        box-shadow: none;
        padding-left: var(--mobile-space-md);
    }
    
    .navbar-nav .dropdown-item {
        padding-left: var(--mobile-space-lg);
    }
}

/* ==========================================================================
   Offcanvas Sidebar Navigation
   ========================================================================== */

@media (max-width: 767px) {
    .offcanvas-navigation {
        width: 85vw;
        max-width: 320px;
        background: white;
    }
    
    .offcanvas-navigation .offcanvas-header {
        padding: var(--mobile-space-md);
        border-bottom: 1px solid #dee2e6;
        min-height: 60px;
        position: sticky;
        top: 0;
        z-index: 2;
        background: white;
    }
    
    .offcanvas-navigation .offcanvas-body {
        padding: 0;
    }
    
    /* Navigation list */
    .offcanvas-nav-list {
        list-style: none;
        padding: 0;
        margin: 0;
    }
    
    .offcanvas-nav-item {
        border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    }
    
    .offcanvas-nav-link {
        display: flex;
        align-items: center;
        min-height: var(--mobile-touch-target-comfortable);
        padding: var(--mobile-touch-padding) var(--mobile-space-md);
        color: inherit;
        text-decoration: none;
        font-size: var(--mobile-font-base);
        transition: background-color var(--mobile-transition-fast) ease;
        border-radius: var(--mobile-radius-sm);
    }
    
    .offcanvas-nav-link:active {
        background-color: rgba(0, 0, 0, 0.05);
    }

    .offcanvas-nav-link:hover,
    .offcanvas-nav-link:focus-visible {
        background-color: rgba(0, 0, 0, 0.03);
        outline: none;
    }

    .offcanvas-nav-link:focus-visible {
        outline: 2px solid var(--bs-primary);
        outline-offset: 2px;
    }
    
    .offcanvas-nav-link.active {
        background-color: var(--bs-primary);
        color: white;
        font-weight: 500;
    }
    
    /* Icons in navigation */
    .offcanvas-nav-link i,
    .offcanvas-nav-link svg {
        width: 24px;
        height: 24px;
        margin-right: var(--mobile-space-md);
        flex-shrink: 0;
    }

    .offcanvas-nav-link i {
        font-size: 1.25rem;
        line-height: 1;
    }

    /* Right-aligned badges (counts) */
    .offcanvas-nav-link .badge {
        margin-left: auto;
        font-size: 0.75rem;
        padding: 2px 8px;
        border-radius: 12px;
    }
    
    /* Nested navigation */
    .offcanvas-nav-submenu {
        list-style: none;
        padding: 0;
        margin: 0;
        background-color: rgba(0, 0, 0, 0.02);
    }
    
    .offcanvas-nav-submenu .offcanvas-nav-link {
        padding-left: calc(var(--mobile-space-md) + 24px + var(--mobile-space-md));
        font-size: var(--mobile-font-sm);
    }
    
    /* Collapsible navigation sections */
    .offcanvas-nav-section-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        min-height: var(--mobile-touch-target-comfortable);
        padding: var(--mobile-touch-padding) var(--mobile-space-md);
        font-size: var(--mobile-font-base);
        font-weight: 600;
        background: transparent;
        border: none;
        width: 100%;
        text-align: left;
        cursor: pointer;
        border-radius: var(--mobile-radius-sm);
    }

    .offcanvas-nav-section-header:hover,
    .offcanvas-nav-section-header:focus-visible {
        background-color: rgba(0, 0, 0, 0.03);
        outline: none;
    }

    .offcanvas-nav-section-header:focus-visible {
        outline: 2px solid var(--bs-primary);
        outline-offset: 2px;
    }

    .offcanvas-nav-section-header:active {
        background-color: rgba(0, 0, 0, 0.05);
    }

    .offcanvas-nav-section-header i {
        font-size: 1.25rem;
        line-height: 1;
    }

    /* Chevron rotation (works when markup uses .bi-chevron-down) */
    .offcanvas-nav-section-header i.bi-chevron-down {
        transition: transform var(--mobile-transition-base) ease;
    }

    .offcanvas-nav-section-header[aria-expanded="true"] i.bi-chevron-down {
        transform: rotate(180deg);
    }
    
    .offcanvas-nav-section-header::after {
        content: '';
        width: 0;
        height: 0;
        border-left: 5px solid transparent;
        border-right: 5px solid transparent;
        border-top: 5px solid currentColor;
        transition: transform var(--mobile-transition-base) ease;
    }
    
    .offcanvas-nav-section-header[aria-expanded="true"]::after {
        transform: rotate(180deg);
    }

    /* Quick access (favorites) */
    .mobile-quick-access {
        padding-top: 0.25rem;
    }

    .mobile-quick-access hr {
        border-color: rgba(0, 0, 0, 0.08);
    }

    /* Search */
    .mobile-nav-search {
        position: sticky;
        top: 60px;
        z-index: 1;
        background: white;
        border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    }

    .mobile-nav-search .input-group-text {
        background: transparent;
    }

    .mobile-nav-search .form-control:focus {
        box-shadow: none;
        border-color: var(--bs-primary);
    }
}

/* ==========================================================================
   Bottom Navigation Bar (Tab Bar)
   ========================================================================== */

@media (max-width: 767px) {
    /* Hide bottom nav when any Bootstrap modal is open — the nav sits at
       z-index 1040 which is below the modal (1055) but stacking-context
       edge cases on some mobile browsers can cause it to overlay the
       modal footer and intercept touches. */
    body.modal-open .bottom-nav {
        display: none !important;
    }

    .bottom-nav {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        background: white;
        border-top: 1px solid #dee2e6;
        display: flex;
        justify-content: space-around;
        align-items: center;
        height: calc(56px + var(--mobile-safe-area-bottom));
        padding-bottom: var(--mobile-safe-area-bottom);
        z-index: var(--mobile-z-bottom-nav);
        box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    }
    
    .bottom-nav-item {
        flex: 1;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        min-height: var(--mobile-touch-target-min);
        padding: var(--mobile-space-xs) var(--mobile-space-sm);
        color: #6c757d;
        text-decoration: none;
        font-size: var(--mobile-font-xs);
        transition: color var(--mobile-transition-fast) ease;
        position: relative;
    }
    
    .bottom-nav-item:active {
        background-color: rgba(0, 0, 0, 0.05);
    }
    
    .bottom-nav-item.active {
        color: var(--bs-primary);
        font-weight: 600;
    }
    
    .bottom-nav-item i,
    .bottom-nav-item svg {
        width: 24px;
        height: 24px;
        margin-bottom: 2px;
    }
    
    /* Badge on bottom nav item */
    .bottom-nav-item .badge {
        position: absolute;
        top: 2px;
        right: 50%;
        transform: translateX(12px);
        min-width: 18px;
        height: 18px;
        padding: 0 4px;
        font-size: 10px;
        border-radius: 9px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
}

/* ==========================================================================
   Breadcrumb Navigation
   ========================================================================== */

@media (max-width: 767px) {
    .breadcrumb-mobile {
        display: flex;
        align-items: center;
        padding: var(--mobile-space-sm) 0;
        margin-bottom: var(--mobile-space-md);
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        white-space: nowrap;
    }
    
    /* Back button style breadcrumb */
    .breadcrumb-back {
        display: inline-flex;
        align-items: center;
        min-height: var(--mobile-touch-target-min);
        padding: var(--mobile-space-sm) var(--mobile-space-md);
        color: var(--bs-primary);
        text-decoration: none;
        font-size: var(--mobile-font-base);
        border-radius: var(--mobile-radius-md);
    }
    
    .breadcrumb-back:active {
        background-color: rgba(var(--bs-primary-rgb), 0.1);
    }
    
    .breadcrumb-back i,
    .breadcrumb-back svg {
        width: 20px;
        height: 20px;
        margin-right: var(--mobile-space-sm);
    }
    
    /* Truncated breadcrumb */
    .breadcrumb-truncated {
        display: flex;
        align-items: center;
        gap: var(--mobile-space-sm);
    }
    
    .breadcrumb-truncated-item {
        font-size: var(--mobile-font-sm);
        color: #6c757d;
    }
    
    .breadcrumb-truncated-item:last-child {
        color: var(--bs-body-color);
        font-weight: 500;
    }
}

/* ==========================================================================
   Tabs Navigation (Mobile)
   ========================================================================== */

@media (max-width: 767px) {
    .nav-tabs {
        overflow-x: auto;
        overflow-y: hidden;
        flex-wrap: nowrap;
        -webkit-overflow-scrolling: touch;
        border-bottom: 2px solid #dee2e6;
    }
    
    .nav-tabs .nav-link {
        min-width: 120px;
        min-height: var(--mobile-touch-target-min);
        padding: var(--mobile-touch-padding) var(--mobile-space-md);
        white-space: nowrap;
        font-size: var(--mobile-font-sm);
        border: none;
        border-bottom: 3px solid transparent;
        border-radius: 0;
    }
    
    .nav-tabs .nav-link.active {
        border-bottom-color: var(--bs-primary);
        font-weight: 600;
        color: var(--bs-primary);
    }
    
    /* Pills navigation */
    .nav-pills {
        overflow-x: auto;
        overflow-y: hidden;
        flex-wrap: nowrap;
        -webkit-overflow-scrolling: touch;
        gap: var(--mobile-space-sm);
    }

    /* Offcanvas header-actions area (mobile-only) */
    .mobile-header-actions {
        padding-top: var(--mobile-space-sm);
    }
    
    .nav-pills .nav-link {
        min-width: 80px;
        min-height: var(--mobile-touch-target-min);
        padding: var(--mobile-space-sm) var(--mobile-space-md);
        white-space: nowrap;
        font-size: var(--mobile-font-sm);
        border-radius: var(--mobile-radius-full);
    }
}

/* ==========================================================================
   Search Bar (Mobile)
   ========================================================================== */

@media (max-width: 767px) {
    .mobile-search-bar {
        display: flex;
        align-items: center;
        background: #f8f9fa;
        border-radius: var(--mobile-radius-lg);
        padding: var(--mobile-space-sm) var(--mobile-space-md);
        margin: var(--mobile-space-md) 0;
    }
    
    .mobile-search-bar input {
        flex: 1;
        border: none;
        background: transparent;
        padding: var(--mobile-space-sm);
        font-size: var(--mobile-font-base);
        outline: none;
    }
    
    .mobile-search-bar button {
        min-width: var(--mobile-touch-target-min);
        min-height: var(--mobile-touch-target-min);
        padding: var(--mobile-space-sm);
        border: none;
        background: transparent;
        color: #6c757d;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .mobile-search-bar button i,
    .mobile-search-bar button svg {
        width: 20px;
        height: 20px;
    }
}

/* ==========================================================================
   Floating Action Button (FAB)
   ========================================================================== */

@media (max-width: 767px) {
    .fab {
        position: fixed;
        bottom: calc(var(--mobile-space-lg) + var(--mobile-safe-area-bottom));
        right: var(--mobile-space-md);
        width: var(--mobile-touch-target-large);
        height: var(--mobile-touch-target-large);
        border-radius: 50%;
        background: var(--bs-primary);
        color: white;
        display: flex;
        align-items: center;
        justify-content: center;
        box-shadow: var(--mobile-shadow-lg);
        border: none;
        cursor: pointer;
        z-index: 1000;
        transition: transform var(--mobile-transition-base) ease;
    }
    
    .fab:active {
        transform: scale(0.95);
    }
    
    .fab i,
    .fab svg {
        width: 24px;
        height: 24px;
    }
    
    /* FAB with bottom nav */
    .has-bottom-nav .fab {
        bottom: calc(56px + var(--mobile-space-md) + var(--mobile-safe-area-bottom));
    }
}

/* ==========================================================================
   Sticky Headers
   ========================================================================== */

@media (max-width: 767px) {
    .mobile-sticky-header {
        position: sticky;
        top: 0;
        background: white;
        z-index: 100;
        padding: var(--mobile-space-md);
        border-bottom: 1px solid #dee2e6;
        box-shadow: var(--mobile-shadow-sm);
    }
    
    /* Sticky header with fixed navbar */
    .has-fixed-navbar .mobile-sticky-header {
        top: calc(60px + var(--mobile-safe-area-top));
    }
}

/* ==========================================================================
   Navigation Accessibility
   ========================================================================== */

@media (max-width: 767px) {
    /* Skip to main content link */
    .skip-to-main {
        position: absolute;
        top: -100px;
        left: var(--mobile-space-md);
        background: var(--bs-primary);
        color: white;
        padding: var(--mobile-space-md);
        border-radius: var(--mobile-radius-md);
        text-decoration: none;
        z-index: 9999;
        transition: top var(--mobile-transition-fast) ease;
    }
    
    .skip-to-main:focus {
        top: var(--mobile-space-md);
    }
    
    /* Focus indicators */
    .offcanvas-nav-link:focus-visible,
    .bottom-nav-item:focus-visible,
    .mobile-hamburger:focus-visible {
        outline: 3px solid var(--bs-primary);
        outline-offset: 2px;
    }
}

/* ==========================================================================
   Swipe Gesture Indicators
   ========================================================================== */

@media (max-width: 767px) {
    .swipe-indicator {
        position: absolute;
        top: 50%;
        transform: translateY(-50%);
        width: 6px;
        height: 40px;
        background: rgba(0, 0, 0, 0.1);
        border-radius: 3px;
        pointer-events: none;
        opacity: 0;
        transition: opacity var(--mobile-transition-base) ease;
    }
    
    .swipe-indicator.left {
        left: 0;
    }
    
    .swipe-indicator.right {
        right: 0;
    }
    
    .swipe-indicator.visible {
        opacity: 1;
    }
}