/* Navigation Styles */

.main-navigation {
    position: relative;
}

/* Mobile Navigation Toggle */
.nav-toggle {
    display: block;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--border-radius);
    transition: background-color var(--transition-fast);
}

.nav-toggle:hover,
.nav-toggle:focus {
    background-color: var(--color-background-alt);
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* Hamburger Icon */
.hamburger {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-primary);
    position: relative;
    transition: background-color var(--transition-medium);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 2px;
    background-color: var(--color-primary);
    transition: all var(--transition-medium);
}

.hamburger::before {
    top: -8px;
}

.hamburger::after {
    bottom: -8px;
}

/* Hamburger Animation */
.nav-toggle[aria-expanded="true"] .hamburger {
    background-color: transparent;
}

.nav-toggle[aria-expanded="true"] .hamburger::before {
    top: 0;
    transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .hamburger::after {
    bottom: 0;
    transform: rotate(-45deg);
}

/* Navigation Menu */
.nav-menu {
    list-style: none;
    margin: 0;
    padding: 0;
    position: absolute;
    top: 100%;
    right: 0;
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-large);
    box-shadow: var(--shadow-medium);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-medium);
    z-index: 1000;
}

.nav-toggle[aria-expanded="true"] + .nav-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-menu li {
    border-bottom: 1px solid var(--color-border);
}

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

.nav-menu a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-text);
    text-decoration: none;
    font-weight: 500;
    transition: all var(--transition-fast);
    border-radius: var(--border-radius);
    margin: 2px;
}

.nav-menu a:hover,
.nav-menu a:focus {
    background-color: var(--color-background-alt);
    color: var(--color-accent);
    text-decoration: none;
}

.nav-menu a[aria-current="page"] {
    background-color: var(--color-accent);
    color: white;
}

.nav-menu a[aria-current="page"]:hover,
.nav-menu a[aria-current="page"]:focus {
    background-color: var(--color-primary);
    color: white;
}

/* Tablet Navigation (768px and up) */
@media (min-width: 768px) {
    .nav-toggle {
        display: none;
    }
    
    .nav-menu {
        position: static;
        display: flex;
        background: none;
        border: none;
        box-shadow: none;
        opacity: 1;
        visibility: visible;
        transform: none;
        min-width: auto;
        gap: var(--spacing-sm);
    }
    
    .nav-menu li {
        border-bottom: none;
    }
    
    .nav-menu a {
        padding: var(--spacing-xs) var(--spacing-sm);
        margin: 0;
        border-radius: var(--border-radius);
        white-space: nowrap;
    }
    
    .nav-menu a:hover,
    .nav-menu a:focus {
        background-color: var(--color-background-alt);
    }
    
    .nav-menu a[aria-current="page"] {
        background-color: var(--color-accent);
        color: white;
    }
}

/* Desktop Navigation (992px and up) */
@media (min-width: 992px) {
    .nav-menu {
        gap: var(--spacing-md);
    }
    
    .nav-menu a {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-size-base);
    }
}

/* Focus management for keyboard navigation */
.nav-menu a:focus,
.nav-menu a.focused {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* Smooth scrolling for the entire page */
html {
    scroll-behavior: smooth;
}

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
    
    .nav-menu,
    .hamburger,
    .hamburger::before,
    .hamburger::after {
        transition: none;
    }
}

/* Enhanced focus styles for better visibility */
.nav-toggle:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
    background-color: var(--color-background-alt);
}

/* Skip link styles for accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--color-accent);
    color: white;
    padding: 8px;
    text-decoration: none;
    border-radius: var(--border-radius);
    z-index: 10000;
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: 6px;
}

/* Ensure navigation is accessible on touch devices */
@media (hover: none) and (pointer: coarse) {
    .nav-menu a {
        min-height: 44px;
        display: flex;
        align-items: center;
    }
}

/* High contrast mode adjustments */
@media (prefers-contrast: high) {
    .nav-menu {
        border: 2px solid var(--color-text);
    }
    
    .hamburger,
    .hamburger::before,
    .hamburger::after {
        background-color: var(--color-text);
    }
}