/* Main CSS Variables */
:root {
    --bg-color: #1a1a1a;
    --bg-light: #2a2a2a;
    --text-color: #f8f8f2;
    --text-muted: #a0a0a0;
    --border-color: #3a3a3a;
    --accent-color: #8be9fd;
    --primary-color: #50fa7b;
    --danger-color: #ff5555;
    --warning-color: #ffb86c;
    --info-color: #8be9fd;
    --caution-color: #f1fa8c;
    --note-color: #bd93f9;
    --sidebar-width: 280px;
    --header-height: 64px;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

/* Base styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    height: 100vh;
    overflow: hidden;
}

a {
    color: var(--accent-color);
    text-decoration: none;
}

button {
    cursor: pointer;
    background: none;
    border: none;
    color: inherit;
}

/* App layout */
.app-container {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-light);
    border-right: 1px solid var(--border-color);
    height: 100vh;
    overflow-y: auto;
    transition: transform 0.3s ease;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-header h1 {
    font-size: 1.5rem;
    display: flex;
    align-items: center;
}

.sidebar-header h1 i {
    margin-right: 10px;
    color: var(--primary-color);
}

.sidebar-nav {
    padding: 15px 0;
}

.sidebar-nav ul {
    list-style: none;
}

.sidebar-nav li {
    padding: 8px 20px;
}

.sidebar-nav li a {
    display: flex;
    align-items: center;
    color: var(--text-color);
    padding: 8px 12px;
    border-radius: 6px;
    transition: all 0.2s ease;
}

.sidebar-nav li a:hover {
    color: var(--primary-color);
    background-color: rgba(80, 250, 123, 0.1);
    transform: translateX(4px);
}

.sidebar-nav li a.active {
    color: var(--primary-color);
    background-color: rgba(80, 250, 123, 0.15);
    border-left: 3px solid var(--primary-color);
}

.sidebar-nav li a i {
    margin-right: 10px;
}

.sidebar-section {
    margin: 15px 0;
}

.sidebar-section > span {
    display: block;
    font-weight: bold;
    color: var(--text-muted);
    margin-bottom: 10px;
    margin-top: 15px;
    padding: 0 20px;
    display: flex;
    align-items: center;
}

.sidebar-section > span i {
    margin-right: 10px;
}

/* Category tree in sidebar */
.category-tree {
    margin-left: 15px;
    padding-left: 10px;
    border-left: 1px dashed var(--border-color);
}

/* Category item and nested items */
.category-item {
    position: relative;
    transition: background-color 0.2s ease;
}

.category-item:hover > div {
    background-color: rgba(80, 250, 123, 0.05);
}

.category-item .actions {
    z-index: 5;
    border-radius: 4px;
}

/* Document item styling */
.document-item {
    position: relative;
    margin: 2px 0;
}

.document-item:hover {
    background-color: rgba(80, 250, 123, 0.05);
}

/* Animation for collapsing/expanding */
.category-item .mdi-chevron-down,
.category-item .mdi-chevron-right {
    transition: transform 0.2s ease;
}

/* Nested children container */
.children-container {
    overflow: hidden;
    transition: max-height 0.3s ease;
}

/* Hover effects for category items */
.category-item:hover > .category-row {
    color: var(--primary-color);
}

/* Toggle button hover */
.category-item button:hover {
    color: var(--primary-color);
}

/* Document and category action buttons */
.actions button {
    opacity: 0.7;
    transition: opacity 0.2s ease, color 0.2s ease;
}

.actions button:hover {
    opacity: 1;
    color: var(--primary-color);
}

/* Drag and drop styling */
.category-item.drop-target {
    background-color: rgba(80, 250, 123, 0.15);
    outline: 1px dashed var(--primary-color);
}

.document-item.dragging {
    opacity: 0.5;
    background-color: rgba(80, 250, 123, 0.1);
}

/* Proper truncation for long category/document names */
.truncate {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 180px;
}

/* Main content area */
.content {
    flex: 1;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.content-header {
    height: var(--header-height);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    background-color: var(--bg-light);
}

.header-left, .header-right {
    display: flex;
    align-items: center;
    gap: 15px;
}

.header-left h2 {
    margin-left: 10px;
    font-weight: 500;
}

.content-body {
    flex: 1;
    overflow-y: auto;
    padding: 30px;
}

/* Subcategories section styling */
.section-title {
    font-size: 1.5rem;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Category grid */
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.category-card {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--bg-light);
    padding: 20px;
    transition: all 0.3s ease;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.category-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.2);
}

.category-card a {
    display: flex;
    flex-direction: column;
    color: var(--text-color);
    text-decoration: none;
    height: 100%;
}

.category-card i {
    font-size: 2.5rem;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.category-meta {
    margin-top: 15px;
    color: var(--text-muted);
    font-size: 0.85rem;
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.add-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    border-style: dashed;
    height: 100%;
    transition: all 0.3s ease;
}

.add-card:hover {
    background-color: rgba(80, 250, 123, 0.1);
    border-color: var(--primary-color);
}

.add-card i {
    color: var(--text-muted);
    transition: transform 0.3s ease, color 0.3s ease;
}

.add-card:hover i {
    color: var(--primary-color);
    transform: scale(1.2);
}

.add-card h4 {
    color: var(--text-muted);
    transition: color 0.3s ease;
}

.add-card:hover h4 {
    color: var(--primary-color);
}

/* Current Category Indicator */
.current-category {
    background-color: rgba(80, 250, 123, 0.1);
    padding: 15px 20px;
    margin: -30px -30px 20px -30px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
}

.current-category h3 {
    font-size: 1.3rem;
    margin: 0;
    display: flex;
    align-items: center;
}

.current-category h3 i {
    margin-right: 10px;
    color: var(--primary-color);
}

.current-category .category-path {
    margin-left: auto;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.current-category .category-path a {
    color: var(--text-muted);
    transition: color 0.2s ease;
}

.current-category .category-path a:hover {
    color: var(--primary-color);
}

/* Document list */
.document-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

/* Button styles */
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 16px;
    border-radius: 4px;
    font-weight: 500;
    transition: all 0.2s ease;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    margin-left: 8px;
}

.button i {
    margin-right: 8px;
}

.button:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.button.primary {
    background-color: var(--primary-color);
    color: var(--bg-color);
    border: none;
}

.button.primary:hover {
    background-color: rgba(80, 250, 123, 0.8);
}

.icon-button {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 4px;
    background-color: transparent;
    transition: all 0.2s ease;
}

.icon-button:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

/* Dashboard */
.dashboard {
    padding: 30px;
}

.dashboard-section {
    margin-bottom: 40px;
}

.section-header {
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.section-header h3 {
    display: flex;
    align-items: center;
    font-size: 1.4rem;
}

.section-header h3 i {
    margin-right: 12px;
    color: var(--primary-color);
}

/* Document card */
.document-card {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--bg-light);
    padding: 18px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.document-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.document-info {
    flex: 1;
}

.document-info h4 {
    margin-bottom: 8px;
    font-size: 1.1rem;
}

.document-info h4 a {
    color: var(--text-color);
}

.document-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.document-actions {
    display: flex;
    gap: 8px;
}

/* Empty states */
.empty-state {
    padding: 60px;
    text-align: center;
    border: 1px dashed var(--border-color);
    border-radius: 8px;
    margin: 40px auto;
    max-width: 600px;
}

.empty-state i {
    font-size: 4rem;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.empty-state p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background-color: var(--bg-light);
    border-radius: 8px;
    width: 90%;
    max-width: 500px;
    overflow: hidden;
}

.modal-header {
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-body {
    padding: 25px;
}

.close-modal {
    font-size: 1.5rem;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    transition: color 0.2s ease;
}

.close-modal:hover {
    color: var(--text-color);
}

/* Form elements */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-muted);
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: inherit;
    font-size: 1rem;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 25px;
}

.icon-selector {
    display: flex;
    align-items: center;
}

.icon-preview {
    margin-left: 15px;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

/* Tag styles */
.document-tag.small {
    font-size: 10px;
    padding: 1px 5px;
}

/* Document view styles */
.document-view {
    padding: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.document-metadata {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 15px;
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}

/* Editor specific styles */
.editor-container {
    display: flex;
    height: calc(100vh - 130px); /* Account for header + document info */
    overflow: hidden;
}

.editor-pane, .preview-pane {
    flex: 1;
    height: 100%;
    overflow: auto;
}

.editor-pane {
    position: relative;
}

.preview-pane {
    padding: 0;
    border-left: 1px solid var(--border-color);
    background-color: #fff;
}

/* Markdown preview enhancements */
.markdown-body {
    box-sizing: border-box;
    min-width: 200px;
    max-width: 1100px;
    margin: 0 auto;
    padding: 40px 30px;
}

.markdown-body blockquote {
    padding: 0.5em 1em;
    color: #555;
    border-left: 0.25em solid #dfe2e5;
    background-color: #f7f7f7;
    margin: 1em 0;
}

.markdown-body blockquote[data-type="info"],
.markdown-body blockquote[data-type="note"] {
    background-color: #f0f8ff;
    border-left-color: var(--info-color);
}

.markdown-body blockquote[data-type="warning"] {
    background-color: #fef9e7;
    border-left-color: var(--warning-color);
}

.markdown-body blockquote[data-type="danger"],
.markdown-body blockquote[data-type="important"] {
    background-color: #fff0f0;
    border-left-color: var(--danger-color);
}

.markdown-body blockquote[data-type="caution"] {
    background-color: #fdfae5;
    border-left-color: var(--caution-color);
}

.markdown-body blockquote[data-type="tip"] {
    background-color: #effaf5;
    border-left-color: var(--primary-color);
}

.markdown-body a {
    color: #0366d6;
    text-decoration: none;
}

.markdown-body a:hover {
    text-decoration: underline;
}

.markdown-body table {
    border-collapse: collapse;
    margin: 1em 0;
    overflow: auto;
    width: 100%;
}

.markdown-body table th,
.markdown-body table td {
    border: 1px solid #dfe2e5;
    padding: 8px 12px;
}

.markdown-body table th {
    background-color: #f6f8fa;
    font-weight: 600;
}

/* Mobile responsiveness */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        z-index: 100;
        transform: translateX(-100%);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .category-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }
}

/* Category list view */
.active-view {
    background-color: var(--primary-color);
    color: var(--bg-color);
}

.category-list-item {
    transition: all 0.3s ease;
}

.category-list-item .toggle-btn .mdi {
    transition: transform 0.3s ease;
}

.category-list-item .toggle-btn .rotate-90 {
    transform: rotate(90deg);
}

.category-children {
    transition: max-height 0.3s ease, opacity 0.3s ease;
}

/* Animation for sliding down content */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-slide-down {
    animation: slideDown 0.3s ease-out forwards;
}

/* Hover effects for list items */
.document-list-item:hover,
.subcategory-list-item:hover {
    background-color: rgba(80, 250, 123, 0.05);
}

/* Interactive hover effects */
.category-list-item > div {
    transition: all 0.2s ease;
}

.category-list-item > div:hover {
    transform: translateX(2px);
}

/* Document and subcategory items */
.document-list-item,
.subcategory-list-item {
    transition: all 0.2s ease;
    border-radius: 4px;
}

.document-list-item:hover a,
.subcategory-list-item:hover a {
    color: var(--primary-color);
}