/**
 * Layout Styles
 * Main application layout structure
 */

/* Application Container */
.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
}

/* Top Navigation Bar */
.top-bar {
    display: flex;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    gap: var(--spacing-md);
    flex-shrink: 0;
    z-index: 100;
}

.top-bar-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex: 1;
    min-width: 0;
}

.app-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
}

.app-title-icon {
    font-size: 20px;
}

.nav-arrows {
    display: flex;
    gap: var(--spacing-xs);
}

.nav-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: transparent;
    border: none;
    border-radius: var(--border-radius);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.nav-arrow svg {
    width: 20px;
    height: 20px;
    display: block;
    flex-shrink: 0;
}

.nav-arrow:hover:not(:disabled) {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.nav-arrow:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.breadcrumb .nav-arrows {
    margin-right: var(--spacing-sm);
}

.breadcrumb-separator {
    color: var(--text-muted);
    margin: 0 var(--spacing-xs);
}

.top-bar-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-shrink: 0;
}

.view-toggle {
    display: flex;
    gap: var(--spacing-xs);
    background: var(--bg-tertiary);
    border-radius: var(--border-radius);
    padding: 2px;
}

.view-toggle-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: transparent;
    border: none;
    border-radius: var(--border-radius);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 16px;
}

.view-toggle-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.view-toggle-btn.active {
    background: var(--accent-blue);
    color: var(--text-primary);
}

.btn-new-folder {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--accent-blue);
    border: none;
    border-radius: var(--border-radius);
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 18px;
}

.btn-new-folder:hover {
    background: var(--accent-blue-hover);
}

.btn-logout {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: transparent;
    border: none;
    border-radius: var(--border-radius);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 18px;
}

.btn-logout:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

/* Main Layout */
.main-layout {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* Sidebar */
.sidebar {
    width: 250px;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    flex-shrink: 0;
    transition: transform var(--transition-normal);
}

.sidebar-header {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 600;
    color: var(--text-primary);
}

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md) 0;
}

.sidebar-section {
    margin-bottom: var(--spacing-lg);
}

.sidebar-section-title {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
}

.sidebar-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    gap: var(--spacing-sm);
}

.sidebar-item:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.sidebar-item.active {
    background: var(--bg-selected);
    color: var(--text-primary);
}

.sidebar-item-icon {
    font-size: 16px;
    width: 20px;
    text-align: center;
}

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

.folder-tree-item {
    padding: 0;
}

.folder-tree-item > .sidebar-item {
    width: 100%;
}

.folder-tree-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    margin-right: var(--spacing-xs);
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 12px;
    transition: transform var(--transition-fast);
}

.folder-tree-toggle.expanded {
    transform: rotate(90deg);
}

.folder-tree-toggle:hover {
    color: var(--text-primary);
}

.folder-tree-children {
    list-style: none;
    padding-left: var(--spacing-lg);
    margin: 0;
    display: none;
}

.folder-tree-item.expanded > .folder-tree-children {
    display: block;
}

/* Main Content Area */
.content-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--bg-primary);
}

.content-header {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.content-header.breadcrumb-only {
    padding: var(--spacing-sm) var(--spacing-md);
}

.content-body {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: var(--spacing-md);
    max-width: 100%;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        bottom: 0;
        width: 280px;
        z-index: 1000;
        transform: translateX(-100%);
        box-shadow: var(--shadow-lg);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .top-bar-left {
        gap: var(--spacing-sm);
    }
    
    .app-title {
        font-size: var(--font-size-md);
    }
    
    .breadcrumb {
        font-size: var(--font-size-xs);
        max-width: 150px;
    }
    
    .view-toggle {
        display: none; /* Hide on mobile initially, can show in menu */
    }
    
    .btn-mobile-menu {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 32px;
        height: 32px;
        background: transparent;
        border: none;
        color: var(--text-secondary);
        cursor: pointer;
        font-size: 20px;
    }
}

@media (min-width: 769px) {
    .btn-mobile-menu {
        display: none;
    }
}

/* Overlay for mobile sidebar */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
}

.sidebar-overlay.open {
    display: block;
}