/**
 * Navbar Enhancement CSS
 * Advanced styling for navigation bar
 */

/* Active Link Indicator */
.navbar .nav-link.active {
    color: var(--accent-color);
    background: rgba(139, 92, 246, 0.1);
    font-weight: 600;
}

.navbar .nav-link.active::before {
    transform: translateX(-50%) scaleX(1);
}

/* Navbar Animation on Page Load */
@keyframes slideDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.navbar {
    animation: slideDown 0.5s ease-out;
}

/* Language Selector Styling */
.neuro-select {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 12px;
    background: var(--bg-primary);
    box-shadow: 
        inset 2px 2px 5px var(--shadow-dark),
        inset -2px -2px 5px var(--shadow-light);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    outline: none;
}

.neuro-select:hover {
    box-shadow: 
        inset 3px 3px 7px var(--shadow-dark),
        inset -3px -3px 7px var(--shadow-light);
}

.neuro-select:focus {
    box-shadow: 
        inset 3px 3px 7px var(--shadow-dark),
        inset -3px -3px 7px var(--shadow-light),
        0 0 0 3px rgba(139, 92, 246, 0.2);
}

/* Dark Mode Toggle Styling */
.theme-toggle {
    position: relative;
    display: inline-block;
}

.toggle-checkbox {
    display: none;
}

.toggle-label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 60px;
    height: 30px;
    background: var(--bg-primary);
    border-radius: 25px;
    position: relative;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 
        inset 2px 2px 5px var(--shadow-dark),
        inset -2px -2px 5px var(--shadow-light);
    padding: 0 5px;
}

.toggle-label:hover {
    box-shadow: 
        inset 3px 3px 7px var(--shadow-dark),
        inset -3px -3px 7px var(--shadow-light);
}

.toggle-icon {
    font-size: 0.75rem;
    z-index: 1;
    transition: all 0.3s ease;
}

.toggle-slider {
    position: absolute;
    width: 24px;
    height: 24px;
    background: var(--accent-gradient);
    border-radius: 50%;
    top: 3px;
    left: 3px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 8px rgba(139, 92, 246, 0.4);
}

.toggle-checkbox:checked + .toggle-label .toggle-slider {
    transform: translateX(30px);
}

.toggle-checkbox:checked + .toggle-label .sun {
    opacity: 0.5;
}

.toggle-checkbox:checked + .toggle-label .moon {
    opacity: 1;
}

.toggle-checkbox:not(:checked) + .toggle-label .sun {
    opacity: 1;
}

.toggle-checkbox:not(:checked) + .toggle-label .moon {
    opacity: 0.5;
}

/* Mobile Menu Enhancements */
@media (max-width: 768px) {
    /* Backdrop blur when menu is open */
    .nav-menu::before {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0);
        backdrop-filter: blur(0px);
        z-index: -1;
        pointer-events: none;
        transition: all 0.4s ease;
    }
    
    .nav-menu.active::before {
        background: rgba(0, 0, 0, 0.5);
        backdrop-filter: blur(10px);
        pointer-events: all;
    }
    
    /* Menu item hover effect on mobile */
    .navbar .nav-menu.active .nav-link:hover {
        transform: translateX(10px);
        background: rgba(139, 92, 246, 0.15);
    }
    
    /* Language selector on mobile */
    .nav-controls {
        position: relative;
        z-index: 1002;
    }
    
    .neuro-select {
        font-size: 0.85rem;
        padding: 0.4rem 0.75rem;
    }
    
    .toggle-label {
        width: 50px;
        height: 26px;
    }
    
    .toggle-slider {
        width: 20px;
        height: 20px;
    }
    
    .toggle-checkbox:checked + .toggle-label .toggle-slider {
        transform: translateX(24px);
    }
}

/* Tablet responsive adjustments */
@media (max-width: 992px) and (min-width: 769px) {
    .navbar .nav-menu {
        gap: 0.75rem;
    }
    
    .navbar .nav-link {
        padding: 0.4rem 0.75rem;
        font-size: 0.9rem;
    }
    
    .navbar .nav-menu li:last-child .nav-link {
        padding: 0.4rem 1rem;
    }
}

/* Accessibility improvements */
.navbar .nav-link:focus,
.menu-toggle:focus,
.neuro-select:focus,
.toggle-label:focus-within {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
    .navbar,
    .nav-menu,
    .nav-link,
    .toggle-slider,
    .menu-toggle {
        animation: none;
        transition: none;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .navbar {
        border-bottom: 2px solid var(--text-primary);
    }
    
    .nav-link {
        border: 1px solid transparent;
    }
    
    .nav-link:hover,
    .nav-link:focus {
        border-color: var(--accent-color);
    }
}

/* Loading skeleton for navbar (if needed) */
.navbar-skeleton {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 70px;
    background: linear-gradient(
        90deg,
        var(--bg-primary) 25%,
        var(--bg-secondary) 50%,
        var(--bg-primary) 75%
    );
    background-size: 200% 100%;
    animation: loading 1.5s ease-in-out infinite;
}

@keyframes loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* Scroll progress indicator (optional feature) */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--accent-gradient);
    z-index: 1001;
    transition: width 0.1s ease;
}

/* Notification badge for nav items (if needed for future features) */
.nav-link .badge {
    position: absolute;
    top: -5px;
    right: -5px;
    background: var(--accent-color);
    color: white;
    font-size: 0.65rem;
    padding: 0.15rem 0.4rem;
    border-radius: 10px;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(139, 92, 246, 0.4);
}