/**
 * AIC Framework - Responsive Navigation Styles
 * Comprehensive navigation system with Material Design integration
 * Supports desktop dropdowns, mobile hamburger menu, and accessibility
 */

/* ================================================
   NAVIGATION COMPONENT STYLES
   ================================================ */

.aic-navigation {
    position: relative;
    z-index: 1000;
}

/* Skip Link for Accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: var(--md-spacing-3);
    background-color: var(--md-primary);
    color: var(--md-on-primary);
    padding: var(--md-spacing-2) var(--md-spacing-4);
    text-decoration: none;
    border-radius: var(--md-shape-corner-small);
    font: var(--md-label-large-font);
    z-index: 2000;
    transition: top var(--md-motion-duration-medium2) var(--md-motion-easing-standard);
}

.skip-link:focus {
    top: var(--md-spacing-3);
}

/* ================================================
   NAVIGATION HEADER
   ================================================ */

.nav-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--md-surface-container);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--md-outline-variant);
    padding: var(--md-spacing-4) 0;
    box-shadow: var(--md-elevation-2);
    transition: all var(--md-motion-duration-medium2) var(--md-motion-easing-standard);
    z-index: 1000;
}

.nav-header.nav-scrolled {
    background-color: color-mix(in srgb, var(--md-surface-container) 95%, var(--md-surface));
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: var(--md-elevation-3);
    padding: var(--md-spacing-3) 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--md-spacing-5);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* ================================================
   BRAND/LOGO SECTION
   ================================================ */

.nav-brand {
    flex-shrink: 0;
}

.brand-link {
    display: flex;
    align-items: center;
    text-decoration: none;
    transition: opacity var(--md-motion-duration-short4) var(--md-motion-easing-standard);
}

.brand-link:hover {
    opacity: 0.8;
}

.brand-link:focus-visible {
    outline: 2px solid var(--md-primary);
    outline-offset: 2px;
    border-radius: var(--md-shape-corner-small);
}

.brand-logo {
    height: 32px;
    width: auto;
}

.brand-text {
    font: var(--md-headline-medium-font);
    font-weight: 700;
    color: var(--md-primary);
    letter-spacing: -0.025em;
}

/* ================================================
   DESKTOP NAVIGATION
   ================================================ */

.nav-desktop {
    display: flex;
    align-items: center;
    gap: var(--md-spacing-2);
}

.nav-item {
    position: relative;
    display: flex;
    align-items: center;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--md-spacing-2);
    padding: var(--md-spacing-3) var(--md-spacing-4);
    text-decoration: none;
    color: var(--md-on-surface);
    font: var(--md-label-large-font);
    border-radius: var(--md-shape-corner-small);
    transition: all var(--md-motion-duration-short4) var(--md-motion-easing-standard);
    position: relative;
    white-space: nowrap;
    background: none;
    border: none;
    cursor: pointer;
}

.nav-link:hover {
    background-color: color-mix(in srgb, var(--md-primary) 8%, transparent);
    color: var(--md-primary);
}

.nav-link:focus-visible {
    outline: 2px solid var(--md-primary);
    outline-offset: 2px;
}

.nav-link.active {
    color: var(--md-primary);
    background-color: var(--md-primary-container);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 3px;
    background-color: var(--md-primary);
    border-radius: var(--md-shape-corner-full);
}

/* Dropdown Specific Styles */
.nav-dropdown-trigger {
    position: relative;
}

.dropdown-arrow {
    font-size: 18px;
    transition: transform var(--md-motion-duration-short4) var(--md-motion-easing-standard);
}

.dropdown-arrow.rotated {
    transform: rotate(180deg);
}

/* ================================================
   DROPDOWN MENUS
   ================================================ */

.nav-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    background-color: var(--md-surface-container-high);
    border: 1px solid var(--md-outline-variant);
    border-radius: var(--md-shape-corner-medium);
    box-shadow: var(--md-elevation-3);
    padding: var(--md-spacing-2) 0;
    margin-top: var(--md-spacing-2);
    z-index: 1100;
}

.nav-dropdown::before {
    content: '';
    position: absolute;
    top: -6px;
    left: var(--md-spacing-4);
    width: 0;
    height: 0;
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-bottom: 6px solid var(--md-outline-variant);
}

.nav-dropdown::after {
    content: '';
    position: absolute;
    top: -5px;
    left: calc(var(--md-spacing-4) + 1px);
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-bottom: 5px solid var(--md-surface-container-high);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--md-spacing-3);
    padding: var(--md-spacing-3) var(--md-spacing-4);
    text-decoration: none;
    color: var(--md-on-surface);
    font: var(--md-body-medium-font);
    transition: background-color var(--md-motion-duration-short4) var(--md-motion-easing-standard);
}

.dropdown-item:hover {
    background-color: var(--md-secondary-container);
    color: var(--md-on-secondary-container);
}

.dropdown-item:focus-visible {
    outline: 2px solid var(--md-primary);
    outline-offset: -2px;
}

.dropdown-item .material-icons {
    font-size: 18px;
}

.dropdown-divider {
    height: 1px;
    background-color: var(--md-outline-variant);
    margin: var(--md-spacing-2) 0;
}

/* User Dropdown Specific */
.user-menu-trigger {
    background-color: var(--md-surface-variant);
    border-radius: var(--md-shape-corner-full);
}

.user-dropdown {
    right: 0;
    left: auto;
}

.user-dropdown::before,
.user-dropdown::after {
    left: auto;
    right: var(--md-spacing-4);
}

.user-dropdown::after {
    right: calc(var(--md-spacing-4) + 1px);
}

/* ================================================
   AUTHENTICATION SECTION
   ================================================ */

.nav-auth {
    display: flex;
    align-items: center;
    gap: var(--md-spacing-3);
    margin-left: var(--md-spacing-4);
    padding-left: var(--md-spacing-4);
    border-left: 1px solid var(--md-outline-variant);
}

.nav-cta {
    min-height: 40px;
    font: var(--md-label-large-font);
}

.user-name {
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ================================================
   MOBILE MENU BUTTON
   ================================================ */

.mobile-menu-button {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 32px;
    height: 32px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
    transition: transform var(--md-motion-duration-short4) var(--md-motion-easing-standard);
}

.mobile-menu-button:focus-visible {
    outline: 2px solid var(--md-primary);
    outline-offset: 2px;
    border-radius: var(--md-shape-corner-small);
}

.hamburger-line {
    width: 100%;
    height: 3px;
    background-color: var(--md-on-surface);
    border-radius: var(--md-shape-corner-full);
    transition: all var(--md-motion-duration-medium2) var(--md-motion-easing-emphasized);
    transform-origin: center;
}

.mobile-menu-button.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(7px, 7px);
}

.mobile-menu-button.active .hamburger-line:nth-child(2) {
    opacity: 0;
    transform: scale(0);
}

.mobile-menu-button.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* ================================================
   MOBILE OVERLAY
   ================================================ */

.mobile-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 999;
}

/* ================================================
   MOBILE MENU
   ================================================ */

.mobile-menu {
    position: fixed;
    top: 0;
    right: 0;
    width: 100%;
    max-width: 320px;
    height: 100vh;
    background-color: var(--md-surface-container-high);
    box-shadow: var(--md-elevation-4);
    z-index: 1001;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.mobile-menu-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--md-spacing-4) var(--md-spacing-5);
    border-bottom: 1px solid var(--md-outline-variant);
    background-color: var(--md-surface-container);
}

.mobile-brand .brand-link {
    font: var(--md-title-large-font);
    font-weight: 600;
    color: var(--md-primary);
}

.mobile-close-button {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    border-radius: var(--md-shape-corner-full);
    color: var(--md-on-surface);
    cursor: pointer;
    transition: background-color var(--md-motion-duration-short4) var(--md-motion-easing-standard);
}

.mobile-close-button:hover {
    background-color: var(--md-surface-variant);
}

.mobile-close-button:focus-visible {
    outline: 2px solid var(--md-primary);
    outline-offset: 2px;
}

/* ================================================
   MOBILE MENU CONTENT
   ================================================ */

.mobile-menu-content {
    flex: 1;
    padding: var(--md-spacing-4) 0;
}

.mobile-nav-item {
    display: flex;
    flex-direction: column;
}

.mobile-nav-link {
    display: flex;
    align-items: center;
    gap: var(--md-spacing-3);
    padding: var(--md-spacing-4) var(--md-spacing-5);
    text-decoration: none;
    color: var(--md-on-surface);
    font: var(--md-body-large-font);
    border: none;
    background: none;
    cursor: pointer;
    transition: background-color var(--md-motion-duration-short4) var(--md-motion-easing-standard);
    text-align: left;
    width: 100%;
    min-height: 48px; /* Touch target size */
}

.mobile-nav-link:hover {
    background-color: var(--md-secondary-container);
    color: var(--md-on-secondary-container);
}

.mobile-nav-link:focus-visible {
    outline: 2px solid var(--md-primary);
    outline-offset: -2px;
}

.mobile-nav-link.active {
    background-color: var(--md-primary-container);
    color: var(--md-on-primary-container);
}

.mobile-dropdown-trigger {
    justify-content: space-between;
}

.mobile-dropdown-arrow {
    font-size: 20px;
    transition: transform var(--md-motion-duration-short4) var(--md-motion-easing-standard);
}

.mobile-dropdown-arrow.rotated {
    transform: rotate(180deg);
}

.mobile-dropdown {
    background-color: var(--md-surface-variant);
}

.mobile-dropdown-item {
    padding-left: calc(var(--md-spacing-5) + var(--md-spacing-6));
    font: var(--md-body-medium-font);
    color: var(--md-on-surface-variant);
}

.mobile-dropdown-item:hover {
    background-color: var(--md-surface-container);
    color: var(--md-on-surface);
}

/* ================================================
   MOBILE AUTHENTICATION SECTION
   ================================================ */

.mobile-auth-section {
    margin-top: var(--md-spacing-4);
    padding-top: var(--md-spacing-4);
    border-top: 1px solid var(--md-outline-variant);
}

.mobile-cta {
    margin: var(--md-spacing-4) var(--md-spacing-5);
    justify-content: center;
    min-height: 48px;
}

/* ================================================
   ANIMATION CLASSES FOR ALPINE.JS
   ================================================ */

/* Dropdown Animations */
.dropdown-enter {
    transition: all var(--md-motion-duration-medium2) var(--md-motion-easing-emphasized);
}

.dropdown-enter-start {
    opacity: 0;
    transform: translateY(-8px) scale(0.95);
}

.dropdown-enter-end {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.dropdown-leave {
    transition: all var(--md-motion-duration-short4) var(--md-motion-easing-standard);
}

.dropdown-leave-start {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.dropdown-leave-end {
    opacity: 0;
    transform: translateY(-4px) scale(0.98);
}

/* Mobile Overlay Animations */
.overlay-enter {
    transition: opacity var(--md-motion-duration-medium2) var(--md-motion-easing-standard);
}

.overlay-enter-start {
    opacity: 0;
}

.overlay-enter-end {
    opacity: 1;
}

.overlay-leave {
    transition: opacity var(--md-motion-duration-short4) var(--md-motion-easing-standard);
}

.overlay-leave-start {
    opacity: 1;
}

.overlay-leave-end {
    opacity: 0;
}

/* Mobile Menu Animations */
.mobile-menu-enter {
    transition: transform var(--md-motion-duration-medium2) var(--md-motion-easing-emphasized);
}

.mobile-menu-enter-start {
    transform: translateX(100%);
}

.mobile-menu-enter-end {
    transform: translateX(0);
}

.mobile-menu-leave {
    transition: transform var(--md-motion-duration-medium2) var(--md-motion-easing-emphasized);
}

.mobile-menu-leave-start {
    transform: translateX(0);
}

.mobile-menu-leave-end {
    transform: translateX(100%);
}

/* Mobile Dropdown Animations */
.mobile-dropdown-enter {
    transition: all var(--md-motion-duration-medium2) var(--md-motion-easing-standard);
}

.mobile-dropdown-enter-start {
    opacity: 0;
    max-height: 0;
    transform: scaleY(0);
    transform-origin: top;
}

.mobile-dropdown-enter-end {
    opacity: 1;
    max-height: 500px;
    transform: scaleY(1);
}

.mobile-dropdown-leave {
    transition: all var(--md-motion-duration-short4) var(--md-motion-easing-standard);
}

.mobile-dropdown-leave-start {
    opacity: 1;
    max-height: 500px;
    transform: scaleY(1);
}

.mobile-dropdown-leave-end {
    opacity: 0;
    max-height: 0;
    transform: scaleY(0);
}

/* ================================================
   RESPONSIVE BREAKPOINTS
   ================================================ */

@media (max-width: 767px) {
    .nav-desktop {
        display: none;
    }
    
    .mobile-menu-button {
        display: flex;
    }
    
    .nav-container {
        padding: 0 var(--md-spacing-4);
    }
}

@media (min-width: 768px) {
    .mobile-menu-button,
    .mobile-overlay,
    .mobile-menu {
        display: none !important;
    }
}

/* ================================================
   ACCESSIBILITY ENHANCEMENTS
   ================================================ */

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    .nav-header {
        border-bottom-width: 2px;
    }
    
    .nav-link:hover,
    .mobile-nav-link:hover {
        outline: 1px solid currentColor;
    }
    
    .dropdown-item:hover,
    .mobile-dropdown-item:hover {
        outline: 1px solid currentColor;
        outline-offset: -1px;
    }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    .nav-header,
    .nav-link,
    .dropdown-arrow,
    .hamburger-line,
    .mobile-menu-button,
    .dropdown-item,
    .mobile-nav-link,
    .mobile-dropdown-arrow,
    .brand-link {
        transition-duration: 0.01ms !important;
    }
    
    .dropdown-enter,
    .dropdown-leave,
    .overlay-enter,
    .overlay-leave,
    .mobile-menu-enter,
    .mobile-menu-leave,
    .mobile-dropdown-enter,
    .mobile-dropdown-leave {
        transition-duration: 0.01ms !important;
    }
}

/* Focus Management */
.nav-item:focus-within .nav-dropdown {
    display: block;
}

/* Touch Device Optimizations */
@media (hover: none) and (pointer: coarse) {
    .nav-link:hover,
    .dropdown-item:hover,
    .mobile-nav-link:hover {
        background-color: transparent;
    }
    
    .nav-link:active,
    .dropdown-item:active,
    .mobile-nav-link:active {
        background-color: var(--md-secondary-container);
        color: var(--md-on-secondary-container);
    }
}

/* Print Styles */
@media print {
    .aic-navigation {
        display: none;
    }
}

/* ================================================
   DARK MODE SPECIFIC ADJUSTMENTS
   ================================================ */

[data-theme="dark"] .nav-header {
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
}

[data-theme="dark"] .nav-header.nav-scrolled {
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
}