/**
 * Enhanced Navigation Styles
 * Collapsible sections, animations, mobile responsiveness
 */

/* Navigation Base Styles */
.admin-sidebar {
    transition: transform 0.3s ease;
}

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

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: all 0.2s ease;
    position: relative;
}

.nav-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
    text-decoration: none;
}

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

.nav-link.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background-color: rgba(255, 255, 255, 0.8);
}

.nav-icon {
    width: 20px;
    margin-right: 12px;
    text-align: center;
    font-size: 14px;
}

.nav-text {
    font-size: 14px;
    font-weight: 500;
}

/* Section Headers */
.nav-section-header {
    position: relative;
}

.nav-section-toggle {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    color: rgba(255, 255, 255, 0.6);
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: all 0.2s ease;
    user-select: none;
}

.nav-section-toggle:hover {
    color: rgba(255, 255, 255, 0.8);
    background-color: rgba(255, 255, 255, 0.05);
}

.nav-section-header.active-section .nav-section-toggle {
    color: var(--primary-light, #4d9fff);
    background-color: rgba(255, 255, 255, 0.05);
}

.section-arrow {
    margin-right: 8px;
    transition: transform 0.2s ease;
    font-size: 10px;
}

.section-arrow.expanded {
    transform: rotate(180deg);
}

.section-title {
    flex: 1;
}

/* Section Content */
.nav-section-content {
    overflow: hidden;
    max-height: 0;
    transition: max-height 0.3s ease;
}

.nav-section-content.expanded {
    max-height: 500px; /* Adjust based on content */
}

.nav-subsection {
    padding: 0;
    margin: 0;
    list-style: none;
    background-color: rgba(0, 0, 0, 0.1);
}

.nav-subitem .nav-link {
    padding-left: 52px; /* Indent sub-items */
    font-size: 13px;
    border-left: 2px solid transparent;
}

.nav-subitem .nav-link:hover {
    border-left-color: rgba(255, 255, 255, 0.3);
    background-color: rgba(255, 255, 255, 0.08);
}

.nav-subitem .nav-link.active {
    border-left-color: var(--primary);
    background-color: rgba(var(--primary-rgb, 0, 102, 204), 0.2);
}

/* Mobile Navigation */
.nav-mobile-toggle {
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 1001;
    width: 44px;
    height: 44px;
    background-color: var(--admin-sidebar);
    color: white;
    border: none;
    border-radius: 6px;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    transition: all 0.2s ease;
}

.nav-mobile-toggle:hover {
    background-color: var(--primary);
    transform: scale(1.05);
}

.nav-mobile-header {
    display: none;
    padding: 15px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.nav-toggle {
    color: rgba(255, 255, 255, 0.8);
    background: none;
    border: none;
    font-size: 18px;
    padding: 0;
    margin-left: auto;
}

.nav-toggle:hover {
    color: white;
}

.nav-mobile-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 999;
    display: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.nav-mobile-overlay.show {
    display: block;
    opacity: 1;
}

/* Breadcrumb Styles - Hidden for now to fix layout */
.breadcrumb-container {
    display: none; /* Hide breadcrumb to eliminate gray area */
    background-color: rgba(248, 249, 250, 0.8);
    border-bottom: 1px solid var(--admin-border);
    padding: 12px 0;
    margin-left: 250px;
    transition: margin-left 0.3s ease;
}

.breadcrumb {
    margin: 0;
    padding: 0 32px;
    background: none;
    font-size: 13px;
}

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

.breadcrumb-item.active {
    color: var(--admin-text);
    font-weight: 500;
}

.breadcrumb-item + .breadcrumb-item::before {
    content: ">";
    color: var(--admin-text-muted);
    margin: 0 8px;
}

.breadcrumb-item a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.breadcrumb-item a:hover {
    color: var(--primary);
    text-decoration: underline;
}

/* Mobile Responsive Styles */
@media (max-width: 991.98px) {
    .nav-mobile-toggle {
        display: flex;
    }
    
    .admin-sidebar {
        transform: translateX(-100%);
        position: fixed;
        z-index: 1000;
        width: 280px;
    }
    
    .admin-sidebar.mobile-open {
        transform: translateX(0);
    }
    
    .nav-mobile-header {
        display: block;
    }
    
    .admin-content {
        margin-left: 0;
    }
    
    .breadcrumb-container {
        margin-left: 0;
    }
    
    .nav-mobile-open {
        overflow: hidden;
    }
}

/* Tablet Responsive */
@media (max-width: 767.98px) {
    .admin-sidebar {
        width: 100%;
        max-width: 320px;
    }
    
    .breadcrumb-container {
        padding: 8px 0;
    }
    
    .breadcrumb {
        padding: 0 20px;
        font-size: 12px;
    }
}

/* Animation Enhancements */
.nav-section-content {
    animation-duration: 0.3s;
    animation-timing-function: ease-out;
}

@keyframes expandSection {
    from {
        max-height: 0;
        opacity: 0.8;
    }
    to {
        max-height: 500px;
        opacity: 1;
    }
}

@keyframes collapseSection {
    from {
        max-height: 500px;
        opacity: 1;
    }
    to {
        max-height: 0;
        opacity: 0.8;
    }
}

.nav-section-content.expanding {
    animation-name: expandSection;
}

.nav-section-content.collapsing {
    animation-name: collapseSection;
}

/* Focus and Accessibility */
.nav-link:focus,
.nav-section-toggle:focus {
    outline: 2px solid var(--primary);
    outline-offset: -2px;
}

.nav-link:focus:not(:focus-visible) {
    outline: none;
}

/* High Contrast Support */
@media (prefers-contrast: high) {
    .nav-link {
        border: 1px solid transparent;
    }
    
    .nav-link:hover,
    .nav-link:focus {
        border-color: white;
    }
    
    .nav-link.active {
        border-color: white;
    }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    .nav-section-content,
    .section-arrow,
    .nav-link,
    .nav-mobile-overlay,
    .admin-sidebar {
        transition: none;
    }
    
    .nav-section-content.expanding,
    .nav-section-content.collapsing {
        animation: none;
    }
}

/* Dark Mode Support (Future Enhancement) */
@media (prefers-color-scheme: dark) {
    .breadcrumb-container {
        background-color: rgba(33, 37, 41, 0.8);
        border-color: rgba(255, 255, 255, 0.1);
    }
}