/**
 * =============================================
 * Core Navigation CSS
 * /core/assets/css/navigation.css
 * =============================================
 * 
 * Styles for:
 * - Site header
 * - Navigation menu
 * - Mobile menu
 * - Footer
 */

/* ==============================================
   SITE HEADER
   ============================================== */
header {
    background: var(--white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    transition: box-shadow var(--transition-base);
}

header.scrolled {
    box-shadow: var(--shadow-md);
}

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

/* ==============================================
   SITE LOGO
   ============================================== */
.site-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--primary-color);
    text-decoration: none;
    transition: opacity var(--transition-base);
}

.site-logo:hover {
    opacity: 0.8;
}

.site-logo img {
    height: 40px;
    width: auto;
}

/* ==============================================
   NAVIGATION MENU
   ============================================== */
nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: var(--spacing-xs);
}

.nav-item {
    margin: 0;
}

.nav-link {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-primary);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    white-space: nowrap;
}

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

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

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

.nav-link.active:hover {
    background: var(--primary-dark);
}

/* Nav with icons */
.nav-link-icon {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.nav-link-icon svg,
.nav-link-icon i {
    width: 18px;
    height: 18px;
}

/* ==============================================
   NAVIGATION VARIANTS
   ============================================== */

/* Primary navigation (filled background) */
.nav-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    padding: 0;
}

.nav-primary .header-container {
    padding: 0;
}

.nav-primary .nav-menu {
    gap: 0;
}

.nav-primary .nav-link {
    padding: var(--spacing-md) var(--spacing-lg);
    color: rgba(255, 255, 255, 0.9);
    border-radius: 0;
}

.nav-primary .nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
}

.nav-primary .nav-link.active {
    background: rgba(255, 255, 255, 0.2);
    color: var(--white);
}

/* Secondary navigation (subtle) */
.nav-secondary {
    border-bottom: 1px solid var(--border-color);
}

.nav-secondary .nav-link {
    border-bottom: 2px solid transparent;
    border-radius: 0;
    padding-bottom: calc(var(--spacing-sm) - 2px);
}

.nav-secondary .nav-link:hover {
    background: transparent;
    border-bottom-color: var(--primary-color);
}

.nav-secondary .nav-link.active {
    background: transparent;
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

/* ==============================================
   USER MENU
   ============================================== */
.user-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
}

.user-info:hover {
    background: var(--bg-tertiary);
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    background: var(--primary-color);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-sm);
}

.user-avatar img {
    width: 100%;
    height: 100%;
    border-radius: var(--radius-full);
    object-fit: cover;
}

.user-name {
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
}

/* ==============================================
   MOBILE MENU TOGGLE
   ============================================== */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
    color: var(--text-primary);
}

.mobile-menu-toggle svg,
.mobile-menu-toggle i {
    width: 24px;
    height: 24px;
}

/* ==============================================
   DROPDOWN MENU
   ============================================== */
.nav-dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    min-width: 200px;
    margin-top: var(--spacing-xs);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-base);
    z-index: var(--z-dropdown);
}

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

.dropdown-menu-list {
    list-style: none;
    margin: 0;
    padding: var(--spacing-xs);
}

.dropdown-menu-item {
    margin: 0;
}

.dropdown-menu-link {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
}

.dropdown-menu-link:hover {
    background: var(--bg-secondary);
    color: var(--primary-color);
}

.dropdown-divider {
    height: 1px;
    background: var(--border-color);
    margin: var(--spacing-xs) 0;
}

/* ==============================================
   BREADCRUMBS
   ============================================== */
.breadcrumbs {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md) 0;
    font-size: var(--font-size-sm);
}

.breadcrumb-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.breadcrumb-link {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-base);
}

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

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

.breadcrumb-current {
    color: var(--text-primary);
    font-weight: var(--font-weight-medium);
}

/* ==============================================
   FOOTER
   ============================================== */
footer {
    background: var(--text-primary);
    color: rgba(255, 255, 255, 0.8);
    margin-top: auto;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-2xl) var(--spacing-lg);
}

/* Footer Grid */
.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h3 {
    color: var(--white);
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
}

.footer-links {
    list-style: none;
    margin: 0;
    padding: 0;
}

.footer-links li {
    margin-bottom: var(--spacing-sm);
}

.footer-link {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color var(--transition-base);
}

.footer-link:hover {
    color: var(--white);
}

/* Footer Bottom */
.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-lg);
    text-align: center;
}

.footer-bottom p {
    margin: 0;
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.6);
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
}

.footer-bottom a:hover {
    color: var(--white);
    text-decoration: underline;
}

/* Social links */
.footer-social {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    color: var(--white);
    text-decoration: none;
    transition: all var(--transition-base);
}

.social-link:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.social-link svg,
.social-link i {
    width: 20px;
    height: 20px;
}

/* ==============================================
   RESPONSIVE NAVIGATION
   ============================================== */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: block;
    }
    
    nav {
        position: fixed;
        top: 0;
        left: -100%;
        width: 280px;
        height: 100vh;
        background: var(--white);
        box-shadow: var(--shadow-xl);
        padding: var(--spacing-xl) var(--spacing-lg);
        transition: left var(--transition-slow);
        z-index: var(--z-fixed);
        overflow-y: auto;
    }
    
    nav.active {
        left: 0;
    }
    
    .nav-menu {
        flex-direction: column;
        width: 100%;
        gap: var(--spacing-xs);
    }
    
    .nav-link {
        width: 100%;
        padding: var(--spacing-md);
    }
    
    /* Mobile overlay */
    .mobile-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.5);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
        z-index: calc(var(--z-fixed) - 1);
    }
    
    .mobile-overlay.active {
        opacity: 1;
        visibility: visible;
    }
    
    /* Mobile close button */
    .mobile-menu-close {
        position: absolute;
        top: var(--spacing-md);
        right: var(--spacing-md);
        background: none;
        border: none;
        cursor: pointer;
        padding: var(--spacing-xs);
        color: var(--text-primary);
    }
    
    /* Dropdown on mobile */
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        margin-top: 0;
        padding-left: var(--spacing-md);
        background: var(--bg-secondary);
        border-radius: var(--radius-md);
        margin-top: var(--spacing-xs);
    }
    
    .nav-dropdown.active .dropdown-menu {
        display: block;
    }
    
    /* Footer on mobile */
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .footer-social {
        margin-top: var(--spacing-lg);
    }
    
    .user-name {
        display: none;
    }
    
    .header-container {
        padding: var(--spacing-sm) var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .site-logo {
        font-size: var(--font-size-lg);
    }
    
    .site-logo img {
        height: 32px;
    }
    
    nav {
        width: 100%;
        left: -100%;
    }
    
    .footer-container {
        padding: var(--spacing-xl) var(--spacing-md);
    }
}

/* ==============================================
   PRINT STYLES
   ============================================== */
@media print {
    header,
    .mobile-menu-toggle,
    .mobile-overlay,
    .breadcrumbs,
    footer {
        display: none;
    }
}