/* App Container with Sidebar Layout */
.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    position: relative;
}

/* Top Navigation Header */
.top-nav {
    view-transition-name: --persist-top-nav;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--glass-border);
    padding: 4px 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 101;
    box-shadow: var(--shadow-sm);
}

.top-nav-branding {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
    padding: 0.25rem 0.5rem;
    border-radius: var(--border-radius-sm);
}

.top-nav-branding:hover {
    background: var(--surface-hover);
    transform: translateY(-1px);
}

.top-nav-branding img {
    width: 28px;
    height: 28px;
    object-fit: contain;
    transition: var(--transition);
}

.top-nav-branding:hover img {
    transform: scale(1.1);
}

.top-nav-branding-text {
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
}

.top-nav-branding h1 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    line-height: 1;
}

.top-nav-branding:hover h1 {
    color: var(--primary-color);
}

.top-nav-branding .subtitle {
    font-family: var(--font-body);
    font-size: 0.7rem;
    color: var(--text-secondary);
    font-weight: 300;
    margin: 0;
    line-height: 1;
}

.top-nav-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.top-nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.top-nav-link:hover {
    color: var(--primary-color);
    transform: translateY(-1px);
}

.top-nav-link i {
    font-size: 0.8rem;
}

/* Main Container to accommodate top nav */
.main-container {
    display: flex;
    flex: 1;
    margin-top: 68px; /* Height of top nav with branding */
}

/* Mobile Menu Toggle Button */
.mobile-menu-toggle {
    display: none; /* Hidden on desktop, shown on mobile */
    position: fixed;
    top: 1rem;
    left: 1rem;
    z-index: 1001;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    padding: 0.75rem;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
    flex-direction: column;
    gap: 0.25rem;
    width: 44px;
    height: 44px;
    justify-content: center;
    align-items: center;
}

.mobile-menu-toggle:hover {
    background: var(--surface-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.mobile-menu-toggle.active {
    background: var(--primary-color);
}

.hamburger-line {
    width: 20px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 1px;
    transition: all 0.3s ease;
    transform-origin: center;
}

.mobile-menu-toggle.active .hamburger-line {
    background: white;
}

.mobile-menu-toggle.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle.active .hamburger-line:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.mobile-menu-toggle.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Mobile Menu Overlay */
.mobile-menu-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(16, 24, 32, 0.8);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 999;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.mobile-menu-overlay.active {
    display: block;
    opacity: 1;
}

/* Sidebar Styles */
.sidebar {
    view-transition-name: --persist-sidebar;
    width: 280px;
    top: 3.6rem;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-right: 1px solid var(--glass-border);
    color: var(--text-primary);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    overflow: hidden;
    z-index: 100;
    box-shadow: var(--shadow-xl);
}

/* Only enable transitions after page load */
body.loaded .sidebar {
    transition: width 0.3s ease, transform 0.3s ease;
}

.sidebar.collapsed,
html.sidebar-collapsed .sidebar {
    width: 70px;
}

.sidebar.collapsed .nav-link span,
.sidebar.collapsed .nav-search,
html.sidebar-collapsed .sidebar .nav-link span,
html.sidebar-collapsed .sidebar .nav-search {
    display: none;
}

.sidebar.collapsed .nav-link,
html.sidebar-collapsed .sidebar .nav-link {
    justify-content: center;
    padding: 0.875rem 0.5rem;
}

.sidebar.collapsed .nav-link:hover,
html.sidebar-collapsed .sidebar .nav-link:hover {
    transform: translateX(0);
}

.sidebar-header {
    padding: 1rem 1.5rem;
    text-align: center;
    border-bottom: 1px solid var(--glass-border);
    flex-shrink: 0;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.sidebar-header {
    padding: 0.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    height: 3rem;
}

.sidebar-collapse-toggle {
    position: absolute;
    right: 0.5rem;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(var(--primary-rgb), 0.1);
    border: 1px solid rgba(var(--primary-rgb), 0.3);
    color: var(--primary-color);
    width: 32px;
    height: 32px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.9rem;
}

.sidebar-collapse-toggle:hover {
    background: rgba(var(--primary-rgb), 0.2);
    transform: translateY(-50%) scale(1.05);
}

.sidebar.collapsed .sidebar-collapse-toggle,
html.sidebar-collapsed .sidebar .sidebar-collapse-toggle {
    right: 50%;
    transform: translateY(-50%) translateX(50%);
}

.sidebar.collapsed .sidebar-collapse-toggle:hover,
html.sidebar-collapsed .sidebar .sidebar-collapse-toggle:hover {
    transform: translateY(-50%) translateX(50%) scale(1.05);
}

.sidebar-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.nav-search {
    position: relative;
    margin: 1rem 1rem 1rem;
    flex-shrink: 0;
}

.nav-search input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 2.5rem;
    background: var(--surface-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.9rem;
    outline: none;
    transition: var(--transition);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
}

.nav-search input::placeholder {
    color: var(--text-muted);
}

.nav-search input:focus {
    background: var(--surface-secondary);
    border-color: var(--border-focus);
    box-shadow: 0 0 0 2px var(--primary-alpha-10);
}

.nav-search i {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.nav-menu {
    list-style: none;
    margin: 0;
    padding: 0 0 1rem 0;
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding-bottom: 4rem;
}

/* Custom scrollbar for nav menu */
.nav-menu::-webkit-scrollbar {
    width: 6px;
}

.nav-menu::-webkit-scrollbar-track {
    background: transparent;
}

.nav-menu::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
    transition: var(--transition);
}

.nav-menu::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

.nav-item {
    margin: 0;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-family: var(--font-heading);
    transition: var(--transition);
    font-weight: 500;
    border-radius: 0;
    position: relative;
}

.nav-link:hover {
    background: var(--surface-hover);
    color: var(--text-primary);
    transform: translateX(4px);
    box-shadow: inset 4px 0 0 var(--primary-color);
}

.nav-item.active .nav-link {
    background: var(--surface-active);
    color: var(--text-primary);
    box-shadow: inset 4px 0 0 var(--primary-color);
    border-right: none;
}

.nav-link i {
    font-size: 1.1rem;
    width: 20px;
    text-align: center;
}

/* Main Content Area */
.main-content {
    flex: 1;
    margin-left: 280px;
    min-height: 100vh;
    background: var(--bg-primary);
}

/* Only enable transitions after page load */
body.loaded .main-content {
    transition: margin-left 0.3s ease, margin-right 0.3s ease, width 0.3s ease;
}

/* Account for files sidebar when present */
body:has(.files-sidebar) .main-content {
    margin-right: 320px;
}

body:has(.files-sidebar.collapsed) .main-content {
    margin-right: 50px;
}

.sidebar.collapsed ~ .main-content,
body:has(.sidebar.collapsed) .main-content,
html.sidebar-collapsed .main-content {
    margin-left: 70px;
}

/* Wide layout for video tools */
.main-content.video-tool {
    max-width: none;
    width: calc(100vw - 280px);
}

/* Only enable transitions after page load */
body.loaded .main-content.video-tool {
    transition: width 0.3s ease, margin-right 0.3s ease;
}

/* Adjust width when files sidebar is present */
body:has(.files-sidebar) .main-content.video-tool {
    width: calc(100vw - 280px - 320px);
}

body:has(.files-sidebar.collapsed) .main-content.video-tool {
    width: calc(100vw - 280px - 50px);
}

.sidebar.collapsed ~ .main-content.video-tool,
body:has(.sidebar.collapsed) .main-content.video-tool,
html.sidebar-collapsed .main-content.video-tool {
    width: calc(100vw - 70px);
}

/* Both sidebars: left collapsed, right files sidebar present */
body:has(.sidebar.collapsed):has(.files-sidebar) .main-content.video-tool,
html.sidebar-collapsed body:has(.files-sidebar) .main-content.video-tool {
    width: calc(100vw - 70px - 320px);
}

body:has(.sidebar.collapsed):has(.files-sidebar.collapsed) .main-content.video-tool,
html.sidebar-collapsed body:has(.files-sidebar.collapsed) .main-content.video-tool {
    width: calc(100vw - 70px - 50px);
}

.page-header {
    z-index: 100;
    padding: 2rem 2rem 1rem;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-left: none;
    border-right: none;
    box-shadow: var(--shadow-md);
}

.page-header h1 {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.page-header h1 i {
    color: var(--primary-color);
    filter: var(--drop-shadow-primary);
}

.page-header p {
    font-family: var(--font-body);
    color: var(--text-secondary);
    margin: 0;
    font-size: 1rem;
}

/* Content Sections */
.content-section {
    padding: 2rem;
    background: var(--surface-primary);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    margin: 1.5rem 2rem;
    box-shadow: var(--shadow-md);
}

.section-header {
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.section-header h2 {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.section-header h2 i {
    color: var(--primary-color);
    font-size: 1.2rem;
}

.section-header p {
    color: var(--text-secondary);
    margin: 0;
    font-size: 0.95rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex; /* Show on mobile */
        top: 4rem; /* Adjust for top nav */
    }

    .top-nav {
        padding: 0.5rem 1rem;
        justify-content: space-between;
    }

    .top-nav-branding img {
        width: 24px;
        height: 24px;
    }

    .top-nav-branding h1 {
        font-size: 1.1rem;
    }

    .top-nav-branding .subtitle {
        display: none;
    }

    .top-nav-links {
        gap: 1rem;
        margin-left: auto;
    }

    .top-nav-link {
        font-size: 0.85rem;
    }

    .main-container {
        margin-top: 68px; /* Account for branding height on mobile */
    }
    
    .sidebar {
        width: 280px !important;
        height: calc(100vh - 3.6rem);
        position: fixed;
        left: -280px;
        
        border-right: 1px solid var(--glass-border);
        border-bottom: none;
        z-index: 1000;
        overflow: hidden;
        transition: left 0.3s ease;
    }
    
    .sidebar.active {
        left: 0;
    }
    
    .sidebar.collapsed,
    html.sidebar-collapsed .sidebar {
        width: 280px !important;
        left: -280px;
    }
    
    .sidebar.collapsed.active,
    html.sidebar-collapsed .sidebar.active {
        left: 0;
    }
    
    .sidebar.collapsed .nav-link span,
    .sidebar.collapsed .nav-search,
    html.sidebar-collapsed .sidebar .nav-link span,
    html.sidebar-collapsed .sidebar .nav-search {
        display: block !important;
    }
    
    .sidebar.collapsed .nav-link,
    html.sidebar-collapsed .sidebar .nav-link {
        justify-content: flex-start;
        padding: 0.875rem 1.5rem;
    }
    
    .sidebar-collapse-toggle {
        display: none !important;
    }
    
    .sidebar-header {
        padding: 0.5rem 1rem;
    }
    
    .nav-menu {
        padding-bottom: 10rem; /* Add bottom padding on mobile to prevent cutoff */
    }
    
    .main-content,
    .main-content.video-tool,
    .sidebar.collapsed ~ .main-content,
    body:has(.sidebar.collapsed) .main-content,
    html.sidebar-collapsed .main-content,
    body:has(.files-sidebar) .main-content,
    body:has(.files-sidebar) .main-content.video-tool,
    body:has(.files-sidebar.collapsed) .main-content,
    body:has(.files-sidebar.collapsed) .main-content.video-tool,
    body:has(.sidebar.collapsed):has(.files-sidebar) .main-content.video-tool,
    body:has(.sidebar.collapsed):has(.files-sidebar.collapsed) .main-content.video-tool {
        margin-left: 0;
        margin-right: 0;
        width: 100%;
    }
    
    .nav-link:hover {
        transform: none;
    }
    
    .page-header {
        padding: 1.5rem 1rem 1rem;
    }
    
    .content-section {
        margin: 1rem;
        padding: 1.5rem;
    }
}

/* Enhanced Content Styling for Text Pages */
.content-wrapper {
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

.content-wrapper h2 {
    color: var(--text-primary);
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    margin-top: 2.5rem;
    border-bottom: 2px solid var(--accent-color);
    padding-bottom: 0.5rem;
    position: relative;
}

.content-wrapper h2:first-child {
    margin-top: 0;
}

.content-wrapper h3 {
    color: var(--text-primary);
    font-size: 1.4rem;
    font-weight: 500;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    position: relative;
    padding-left: 1rem;
}

.content-wrapper h3::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 1.4rem;
    background: linear-gradient(135deg, var(--accent-color), #ff6b6b);
    border-radius: 2px;
}

.content-wrapper p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 1.8rem;
    text-align: justify;
    hyphens: auto;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.content-wrapper ul {
    margin: 2rem 0;
    padding-left: 0;
    list-style: none;
}

.content-wrapper ul li {
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-bottom: 1rem;
    padding-left: 2rem;
    position: relative;
    line-height: 1.7;
    text-rendering: optimizeLegibility;
}

.content-wrapper ul li::before {
    content: '▸';
    position: absolute;
    left: 0.5rem;
    top: 0.1rem;
    color: var(--accent-color);
    font-weight: bold;
    font-size: 1.3rem;
}

.content-wrapper ul li strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* Simple page header for content pages - no background wrapper */
.main-content .page-header {
    background: none;
    border: none;
    box-shadow: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    padding: 2rem 2rem 1rem;
    margin-bottom: 2rem;
    text-align: center;
}

.main-content .page-header h1 {
    font-size: 2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    justify-content: center;
}

.main-content .page-header p {
    color: var(--text-secondary);
    margin: 0;
    font-size: 1rem;
}

/* Reading comfort enhancements */
.content-section {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

/* Mobile responsive text styling */
@media (max-width: 768px) {
    .content-wrapper {
        padding: 0 1rem;
        line-height: 1.7;
    }
    
    .content-wrapper h2 {
        font-size: 1.7rem;
        margin-top: 2rem;
    }
    
    .content-wrapper h3 {
        font-size: 1.3rem;
        margin-top: 2rem;
        padding-left: 0.8rem;
    }
    
    .content-wrapper h3::before {
        width: 3px;
        height: 1.2rem;
    }
    
    .content-wrapper p {
        font-size: 1.05rem;
        text-align: left;
        margin-bottom: 1.5rem;
    }
    
    .content-wrapper ul li {
        font-size: 1rem;
        padding-left: 1.5rem;
        margin-bottom: 0.8rem;
    }
    
    .content-wrapper ul li::before {
        left: 0.3rem;
        font-size: 1.1rem;
    }
    
    .page-header {
        padding: 2rem 1rem;
    }
    
    .page-header h1 {
        font-size: 2.2rem;
    }
    
    .page-header p {
        font-size: 1.1rem;
    }
}

*:focus:active:not(input) {
    transform: scale(.85);
}