/* ============================================
   NAVIGATION STYLES
   The Wedding Filmmaker's University
   ============================================ */

/* Main Navigation */
.main-nav {
    display: flex;
    align-items: center;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--space-lg);
    margin: 0;
}

.nav-links a {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--color-dark-gray);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--color-primary);
    background-color: var(--color-light-gray);
}

/* Mobile Navigation Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-sm);
    background: none;
    border: none;
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-dark-gray);
    transition: all var(--transition-fast);
}

/* ============================================
   SIDEBAR NAVIGATION (for content pages)
   ============================================ */

.sidebar-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: var(--sidebar-width);
    height: calc(100vh - var(--header-height));
    background-color: var(--color-white);
    border-right: 1px solid var(--color-light-gray);
    overflow-y: auto;
    padding: var(--space-xl) 0;
    z-index: 100;
}

.sidebar-header {
    padding: 0 var(--space-lg) var(--space-lg);
    border-bottom: 1px solid var(--color-light-gray);
    margin-bottom: var(--space-lg);
}

.sidebar-header h3 {
    font-size: 1rem;
    margin-bottom: var(--space-xs);
}

.sidebar-header span {
    font-size: 0.8rem;
    color: var(--color-medium-gray);
}

.sidebar-section {
    padding: 0 var(--space-lg);
    margin-bottom: var(--space-xl);
}

.sidebar-section h4 {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-medium-gray);
    margin-bottom: var(--space-md);
    font-family: var(--font-body);
}

.sidebar-links {
    list-style: none;
}

.sidebar-links li {
    margin-bottom: var(--space-xs);
}

.sidebar-links a {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    font-size: 0.9rem;
    color: var(--color-dark-gray);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.sidebar-links a:hover {
    background-color: var(--color-light-gray);
    color: var(--color-primary);
}

.sidebar-links a.active {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.sidebar-links .lesson-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    font-size: 0.7rem;
    font-weight: 600;
    background-color: var(--color-light-gray);
    border-radius: var(--radius-full);
    flex-shrink: 0;
}

.sidebar-links a.active .lesson-number {
    background-color: rgba(255, 255, 255, 0.2);
}

.sidebar-links a.completed .lesson-number {
    background-color: var(--color-success);
    color: var(--color-white);
}

.sidebar-links a.completed .lesson-number::after {
    content: '✓';
}

/* Nested Links */
.sidebar-links .nested-links {
    margin-left: var(--space-lg);
    margin-top: var(--space-xs);
    padding-left: var(--space-md);
    border-left: 2px solid var(--color-light-gray);
}

.sidebar-links .nested-links a {
    font-size: 0.85rem;
    padding: var(--space-xs) var(--space-md);
}

/* Progress Indicator */
.sidebar-progress {
    padding: var(--space-lg);
    background-color: var(--color-light-gray);
    margin: var(--space-lg);
    border-radius: var(--radius-md);
}

.progress-label {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    margin-bottom: var(--space-sm);
}

.progress-bar {
    height: 6px;
    background-color: var(--color-medium-gray);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background-color: var(--color-primary);
    border-radius: var(--radius-full);
    transition: width var(--transition-slow);
}

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

.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) 0;
    font-size: 0.875rem;
    color: var(--color-medium-gray);
}

.breadcrumb a {
    color: var(--color-medium-gray);
}

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

.breadcrumb-separator {
    opacity: 0.5;
}

.breadcrumb-current {
    color: var(--color-dark-gray);
    font-weight: 500;
}

/* ============================================
   TABLE OF CONTENTS (in-page)
   ============================================ */

.toc {
    position: sticky;
    top: calc(var(--header-height) + var(--space-xl));
    padding: var(--space-lg);
    background-color: var(--color-off-white);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--color-primary);
}

.toc h4 {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-medium-gray);
    margin-bottom: var(--space-md);
    font-family: var(--font-body);
}

.toc-list {
    list-style: none;
}

.toc-list li {
    margin-bottom: var(--space-xs);
}

.toc-list a {
    display: block;
    padding: var(--space-xs) 0;
    font-size: 0.875rem;
    color: var(--color-dark-gray);
    border-left: 2px solid transparent;
    padding-left: var(--space-md);
    margin-left: calc(var(--space-md) * -1);
    transition: all var(--transition-fast);
}

.toc-list a:hover,
.toc-list a.active {
    color: var(--color-primary);
    border-left-color: var(--color-primary);
}

.toc-list .toc-h3 {
    padding-left: calc(var(--space-md) + var(--space-sm));
    font-size: 0.8rem;
}

/* ============================================
   PAGINATION NAVIGATION
   ============================================ */

.pagination {
    display: flex;
    justify-content: space-between;
    gap: var(--space-lg);
    padding: var(--space-2xl) 0;
    border-top: 1px solid var(--color-light-gray);
    margin-top: var(--space-3xl);
}

.pagination-link {
    display: flex;
    flex-direction: column;
    padding: var(--space-lg);
    background-color: var(--color-off-white);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-light-gray);
    transition: all var(--transition-fast);
    flex: 1;
    max-width: 45%;
}

.pagination-link:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-sm);
}

.pagination-link.prev {
    align-items: flex-start;
}

.pagination-link.next {
    align-items: flex-end;
    text-align: right;
}

.pagination-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-medium-gray);
    margin-bottom: var(--space-xs);
}

.pagination-title {
    font-weight: 500;
    color: var(--color-primary);
}

/* ============================================
   FOLDER/TREE VIEW NAVIGATION
   ============================================ */

.folder-tree {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    background-color: var(--color-off-white);
    padding: var(--space-lg);
    border-radius: var(--radius-md);
    overflow-x: auto;
}

.folder-tree ul {
    list-style: none;
    padding-left: var(--space-lg);
}

.folder-tree > ul {
    padding-left: 0;
}

.folder-tree li {
    position: relative;
    padding: var(--space-xs) 0;
}

.folder-tree li::before {
    content: '';
    position: absolute;
    left: calc(var(--space-md) * -1);
    top: 0;
    height: 100%;
    border-left: 1px solid var(--color-medium-gray);
}

.folder-tree li:last-child::before {
    height: 1em;
}

.folder-tree li::after {
    content: '';
    position: absolute;
    left: calc(var(--space-md) * -1);
    top: 0.9em;
    width: var(--space-sm);
    border-bottom: 1px solid var(--color-medium-gray);
}

.folder-tree > ul > li::before,
.folder-tree > ul > li::after {
    display: none;
}

.folder-item {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.folder-item:hover {
    background-color: var(--color-light-gray);
}

.folder-icon {
    opacity: 0.7;
}

.folder-item.is-folder > .folder-icon::before {
    content: '📁';
}

.folder-item.is-folder.open > .folder-icon::before {
    content: '📂';
}

.folder-item.is-file > .folder-icon::before {
    content: '📄';
}

/* ============================================
   QUICK JUMP NAVIGATION
   ============================================ */

.quick-jump {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    z-index: 100;
}

.quick-jump-toggle {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-full);
    background-color: var(--color-primary);
    color: var(--color-white);
    border: none;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    font-size: 1.25rem;
    transition: all var(--transition-fast);
}

.quick-jump-toggle:hover {
    background-color: var(--color-primary-light);
    transform: scale(1.05);
}

.quick-jump-menu {
    position: absolute;
    bottom: calc(100% + var(--space-md));
    right: 0;
    width: 280px;
    background-color: var(--color-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    padding: var(--space-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-normal);
}

.quick-jump.active .quick-jump-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.quick-jump-menu input {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--color-light-gray);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    margin-bottom: var(--space-md);
}

.quick-jump-menu input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.quick-jump-results {
    max-height: 300px;
    overflow-y: auto;
}

.quick-jump-results a {
    display: block;
    padding: var(--space-sm) var(--space-md);
    font-size: 0.875rem;
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-fast);
}

.quick-jump-results a:hover {
    background-color: var(--color-light-gray);
}

/* ============================================
   MOBILE RESPONSIVE
   ============================================ */

@media (max-width: 1024px) {
    .sidebar-nav {
        transform: translateX(-100%);
        transition: transform var(--transition-normal);
    }

    .sidebar-nav.active {
        transform: translateX(0);
    }

    .content-with-sidebar {
        margin-left: 0;
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background-color: var(--color-white);
        flex-direction: column;
        padding: var(--space-lg);
        gap: var(--space-sm);
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-links a {
        padding: var(--space-md);
    }

    .pagination {
        flex-direction: column;
    }

    .pagination-link {
        max-width: 100%;
    }

    .quick-jump {
        bottom: var(--space-md);
        right: var(--space-md);
    }
}