/* Mobile-First Navigation */
.nav-container {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: var(--background-color);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    z-index: 1000;
    display: flex;
    align-items: center;
    transition: transform var(--transition-smooth);
}

/* Hide nav on scroll down for mobile */
.nav-container.nav-hidden {
    transform: translateY(-100%);
}

/* High Contrast Mode Support */
@media (forced-colors: active) {
    .nav-container {
        border-bottom: 2px solid ButtonText;
    }
}

body {
    padding-top: var(--nav-height);
}

/* Logo - Mobile First */
.nav-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--primary-color);
    font-weight: 600;
    font-size: 1rem;
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
}

.nav-logo:hover,
.nav-logo:focus {
    background-color: var(--light-gray);
    outline: none;
}

.nav-logo:focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

@media (min-width: 768px) {
    .nav-logo {
        font-size: 1.2rem;
    }
}

.nav-logo img {
    height: 32px;
    margin-right: 0.5rem;
}

/* Navigation Menu - Mobile First */
.nav-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--background-color);
    flex-direction: column;
    gap: 0;
    margin: 0;
    padding: 0;
    list-style: none;
    transform: translateY(-100%);
    transition: all var(--transition-smooth);
    opacity: 0;
    visibility: hidden;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
}

@media (min-width: 768px) {
    .nav-menu {
        position: static;
        display: flex;
        flex-direction: row;
        align-items: center;
        gap: 2rem;
        transform: none;
        opacity: 1;
        visibility: visible;
        box-shadow: none;
    }
}

.nav-item {
    position: relative;
}

.nav-link {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem;
    transition: color var(--transition-base);
}

.nav-link:hover {
    color: var(--primary-color);
}

/* Dropdown Menu */
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: white;
    border-radius: var(--radius-md);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    padding: 0.5rem;
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.nav-item:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
}

.dropdown-item {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--text-color);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
}

.dropdown-item:hover {
    background: var(--light-gray);
    color: var(--primary-color);
}

/* Mobile Menu Button */
.mobile-menu-button {
    display: none;
    background: none;
    border: none;
    margin-left: 1rem;
    cursor: pointer;
    position: relative;
    z-index: 1000;
    width: 48px;
    height: 48px;
    padding: 12px;
    border-radius: var(--radius-sm);
    transition: all var(--transition-smooth);
    -webkit-tap-highlight-color: transparent;
}

.hamburger-icon {
    position: relative;
    width: 24px;
    height: 24px;
    background: url('/assets/images/nav-icons.svg') no-repeat;
    background-size: 24px;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.mobile-menu-button[aria-expanded="true"] .hamburger-icon {
    background-position: center -24px; /* Show close icon */
}


.mobile-menu-button:hover {
    background-color: var(--light-gray);
}

.mobile-menu-button:active {
    transform: scale(0.95);
}

.mobile-menu-button[aria-expanded="true"] {
    background-color: var(--light-gray);
}

/* Touch Ripple Effect */
.mobile-menu-button::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100%;
    height: 100%;
    background: var(--accent-color);
    border-radius: 50%;
    transform: translate(-50%, -50%) scale(0);
    opacity: 0;
    transition: all 0.4s ease;
}

.mobile-menu-button:active::after {
    transform: translate(-50%, -50%) scale(1.5);
    opacity: 0.2;
}

/* Focus States */
.mobile-menu-button:focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

.nav-link:focus-visible,
.dropdown-item:focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: -2px;
    border-radius: var(--radius-sm);
}

/* Navigation Bar */
.nav-bar {
    position: relative;
    display: grid;
    grid-template-columns: auto minmax(200px, 400px) 1fr auto;
    align-items: center;
    gap: 1rem;
    padding: 0 var(--spacing-lg);
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    height: 100%;
}

@media (min-width: 768px) {
    .nav-bar {
        display: flex !important;
        justify-content: center !important;
    }
    
    .nav-logo {
        margin-right: 2rem !important;
    }

    .nav-menu {
        flex: 1 !important;
        justify-content: center !important;
        margin: 0 auto !important;
        max-width: 800px !important;
    }
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .mobile-menu-button {
        display: flex !important;
        margin-left: auto !important;
        position: relative !important;
        z-index: 1002 !important;
    }

    .nav-bar {
        padding: 0.5rem var(--spacing-lg);
        min-height: var(--nav-height);
        display: grid !important;
        grid-template-columns: auto 1fr auto !important;
    }

    .nav-container {
        position: relative !important;
        z-index: 1001 !important;
    }

    .nav-menu {
        display: none !important;
        position: fixed !important;
        top: var(--nav-height) !important;
        left: 0 !important;
        right: 0 !important;
        width: 100% !important;
        height: calc(100vh - var(--nav-height)) !important;
        background: white !important;
        flex-direction: column !important;
        gap: 0 !important;
        padding: 0 !important;
        opacity: 0 !important;
        visibility: hidden !important;
        transform: translateY(0) !important;
        transition: all var(--transition-smooth) !important;
        box-shadow: 0 4px 12px rgba(0,0,0,0.1) !important;
        z-index: 999 !important;
        border-radius: 0 0 var(--radius-lg) var(--radius-lg) !important;
        border-top: 1px solid var(--border-color) !important;
        overflow-y: auto !important;
    }

    .nav-menu.active {
        display: flex !important;
        opacity: 1 !important;
        visibility: visible !important;
        transform: translateY(0) !important;
    }

    .nav-item {
        width: 100%;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-item:last-child {
        border-bottom: none;
    }

    .nav-link {
        display: block;
        padding: 1rem 1.5rem;
        font-weight: 500;
    }

    .nav-link:hover {
        background-color: var(--light-gray);
    }

    .dropdown-menu {
        position: static;
        transform: none;
        box-shadow: none;
        background: var(--light-gray);
        margin: 0;
        padding: 0;
        opacity: 1;
        visibility: visible;
        display: none;
        border-radius: 0;
        border-top: 1px solid var(--border-color);
    }

    .dropdown-item {
        padding: 0.75rem 2rem;
        border-radius: 0;
        font-size: 0.95rem;
    }

    .dropdown-item:hover {
        background-color: white;
    }

.nav-link.has-dropdown::after {
    content: "";
    display: inline-block;
    width: 24px;
    height: 24px;
    vertical-align: middle;
    margin-left: 0.25rem;
    background: url('/assets/images/nav-icons.svg') no-repeat;
    background-position: center -48px; /* Show dropdown arrow icon */
    opacity: 0.5;
    transition: transform var(--transition-base);
}

    .nav-link.has-dropdown:hover::after {
        opacity: 1;
        transform: rotate(90deg);
    }
}

/* Page Content Spacing */
.main-content {
    padding-top: var(--nav-height);
}

/* Z-index Layering */
.nav-container {
    position: fixed;
    z-index: 1000;
}

.dropdown-menu {
    z-index: 1001;
}

/* Navigation Background */
.nav-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--background-color);
    opacity: 0.98;
    backdrop-filter: blur(8px);
}