/* 
 * Navigation Component Styles
 * Atelier Flint & Associates Architects Website
 * 
 * Styles for navigation-specific functionality including
 * scroll behaviors, active states, and mobile interactions.
 */

/* ==========================================================================
   NAVIGATION SCROLL BEHAVIORS
   ========================================================================== */

.nav-scroll-hide {
    transform: translateY(-100%);
    transition: transform var(--transition-normal);
}

.nav-scroll-show {
    transform: translateY(0);
    transition: transform var(--transition-normal);
}

/* ==========================================================================
   NAVIGATION INDICATORS
   ========================================================================== */

.nav-indicator {
    position: relative;
}

.nav-indicator::before {
    content: '';
    position: absolute;
    top: -10px;
    left: 50%;
    width: 8px;
    height: 8px;
    background-color: var(--color-secondary);
    border-radius: var(--border-radius-full);
    transform: translateX(-50%) scale(0);
    transition: transform var(--transition-fast);
}

.nav-indicator--active::before {
    transform: translateX(-50%) scale(1);
}

/* ==========================================================================
   BREADCRUMB NAVIGATION
   ========================================================================== */

.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.breadcrumb__item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.breadcrumb__link {
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.breadcrumb__link:hover {
    color: var(--color-secondary);
}

.breadcrumb__separator {
    color: var(--color-text-muted);
}

.breadcrumb__current {
    color: var(--color-primary);
    font-weight: var(--font-weight-medium);
}

/* ==========================================================================
   SIDE NAVIGATION (for future use)
   ========================================================================== */

.side-nav {
    position: fixed;
    top: 0;
    right: -300px;
    width: 300px;
    height: 100vh;
    background-color: var(--color-background);
    box-shadow: var(--shadow-xl);
    z-index: var(--z-index-modal);
    transition: right var(--transition-normal);
    padding: var(--spacing-2xl) var(--spacing-lg);
}

.side-nav--open {
    right: 0;
}

.side-nav__overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--color-overlay);
    z-index: var(--z-index-overlay);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.side-nav__overlay--visible {
    opacity: 1;
    visibility: visible;
}

.side-nav__close {
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    background: none;
    border: none;
    color: var(--color-primary);
    font-size: var(--font-size-2xl);
    cursor: pointer;
    padding: var(--spacing-sm);
}

.side-nav__list {
    list-style: none;
    margin: var(--spacing-4xl) 0 0 0;
    padding: 0;
}

.side-nav__item {
    margin-bottom: var(--spacing-md);
}

.side-nav__link {
    display: block;
    color: var(--color-primary);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
    text-decoration: none;
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md);
    transition: all var(--transition-fast);
}

.side-nav__link:hover {
    color: var(--color-secondary);
    background-color: var(--color-quaternary);
}

/* ==========================================================================
   NAVIGATION ANIMATIONS
   ========================================================================== */

/* Slide in from top */
.nav-slide-down {
    animation: navSlideDown var(--animation-duration-normal) ease-out;
}

@keyframes navSlideDown {
    from {
        transform: translateY(-20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* Fade in navigation items with stagger effect */
.nav-item-stagger {
    opacity: 0;
    transform: translateY(10px);
    animation: navItemFadeIn var(--animation-duration-normal) ease-out forwards;
}

.nav-item-stagger:nth-child(1) { animation-delay: 0.1s; }
.nav-item-stagger:nth-child(2) { animation-delay: 0.2s; }
.nav-item-stagger:nth-child(3) { animation-delay: 0.3s; }
.nav-item-stagger:nth-child(4) { animation-delay: 0.4s; }
.nav-item-stagger:nth-child(5) { animation-delay: 0.5s; }
.nav-item-stagger:nth-child(6) { animation-delay: 0.6s; }

@keyframes navItemFadeIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================================================
   RESPONSIVE NAVIGATION UTILITIES
   ========================================================================== */

/* Navigation visibility utilities */
.nav-desktop-only {
    display: block;
}

.nav-mobile-only {
    display: none;
}

@media (max-width: 991px) {
    .nav-desktop-only {
        display: none;
    }
    
    .nav-mobile-only {
        display: block;
    }
}

/* Navigation spacing adjustments for different screen sizes */
@media (max-width: 767px) {
    .breadcrumb {
        font-size: var(--font-size-xs);
        gap: var(--spacing-xs);
    }
}

/* ==========================================================================
   NAVIGATION STATES
   ========================================================================== */

/* Loading state for navigation */
.nav-loading {
    opacity: 0.6;
    pointer-events: none;
}

.nav-loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    border: 2px solid var(--color-border);
    border-top: 2px solid var(--color-secondary);
    border-radius: var(--border-radius-full);
    animation: spin 1s linear infinite;
    transform: translate(-50%, -50%);
}

/* Disabled navigation state */
.nav-disabled {
    opacity: 0.5;
    pointer-events: none;
}

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

/* Focus styles for keyboard navigation */
.nav-link:focus,
.breadcrumb__link:focus {
    outline: 2px solid var(--color-secondary);
    outline-offset: 2px;
    border-radius: var(--border-radius-sm);
}

/* Skip navigation link */
.skip-nav {
    position: absolute;
    top: -40px;
    left: 6px;
    background-color: var(--color-primary);
    color: var(--color-text-light);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-md);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    z-index: var(--z-index-tooltip);
    transition: top var(--transition-fast);
}

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

/* Reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
    .nav-scroll-hide,
    .nav-scroll-show,
    .nav-slide-down,
    .nav-item-stagger,
    .side-nav {
        transition: none;
        animation: none;
    }
    
    .nav-indicator::before {
        transition: none;
    }
}