/* Global Styles */
:root {
    --bg-color: #ffffff;
    --text-color: #333333;
    --primary-color: #4a6fa5;
    --secondary-color: #e8f0fe;
    --border-color: #ddd;
    --sidebar-bg: #f5f5f5;
    --editor-bg: #ffffff;
    --preview-bg: #ffffff;
    --header-bg: #f8f9fa;
    --hover-color: #e0e0e0;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --code-bg: #f6f8fa;
    --blockquote-border: #d0d7de;
    --toolbar-icon: #555;
    --scrollbar-thumb: #c1c1c1;
    --scrollbar-track: #f1f1f1;
}

.dark-mode {
    --bg-color: #1e1e1e;
    --text-color: #e0e0e0;
    --primary-color: #5f8dd3;
    --secondary-color: #2d2d2d;
    --border-color: #444;
    --sidebar-bg: #252526;
    --editor-bg: #1e1e1e;
    --preview-bg: #2d2d2d;
    --header-bg: #333333;
    --hover-color: #3e3e3e;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --code-bg: #2a2a2a;
    --blockquote-border: #555;
    --toolbar-icon: #bbb;
    --scrollbar-thumb: #555;
    --scrollbar-track: #333;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    display: flex;
    flex-direction: column;
    height: 100vh;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s, color 0.3s;
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--scrollbar-track);
}

::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #999;
}

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
    background-color: var(--header-bg);
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 1px 3px var(--shadow-color);
    z-index: 10;
}

.logo h1 {
    font-size: 1.3rem;
    color: var(--primary-color);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

#files-toggle {
    background: transparent;
    border: none;
    color: var(--toolbar-icon);
    cursor: pointer;
    padding: 4px 6px;
    border-radius: 4px;
    font-size: 0.9rem;
    transition: background-color 0.2s;
}

#files-toggle:hover {
    background-color: var(--hover-color);
}

.toolbar {
    display: flex;
    gap: 10px;
}

.toolbar button {
    background: transparent;
    border: none;
    color: var(--toolbar-icon);
    padding: 6px 10px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 5px;
    transition: background-color 0.2s;
}

.toolbar button:hover {
    background-color: var(--hover-color);
}

/* Export dropdown */
.export-dropdown {
    position: relative;
    display: inline-block;
}

.export-options {
    display: none;
    position: absolute;
    right: 0;
    top: 100%;
    background-color: var(--bg-color);
    min-width: 150px;
    box-shadow: 0 8px 16px 0 var(--shadow-color);
    z-index: 1;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.export-options button {
    width: 100%;
    text-align: left;
    padding: 10px 15px;
    border-radius: 0;
}

.export-dropdown:hover .export-options {
    display: block;
}

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

/* Sidebar */
.sidebar {
    width: 250px;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: width 0.3s;
}

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 15px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-header h3 {
    font-size: 0.9rem;
    font-weight: 600;
}

.sidebar-header button {
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--toolbar-icon);
}

.file-explorer {
    flex: 1;
    overflow-y: auto;
    padding: 10px;
}

.folder, .file {
    padding: 5px 8px;
    border-radius: 4px;
    cursor: pointer;
    margin-bottom: 2px;
    user-select: none;
    width: 100%;
}

.folder {
    position: relative;
    display: flex;
    flex-direction: column;
}

.folder-header {
    display: flex;
    align-items: center;
    cursor: pointer;
}

.file {
    display: flex;
    align-items: center;
}

.folder > span, .file > span, .folder-header > span {
    margin-left: 5px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-size: 0.9rem;
}

/* Change folder contents to display as blocks below the folder */
.folder-contents {
    display: none;
    margin-left: 20px;
    margin-top: 2px;
    width: 100%;
}

.folder.open > .folder-contents {
    display: block;
}

/* Add expander icon */
.folder .folder-expander {
    margin-right: 5px;
    width: 12px;
    text-align: center;
    transition: transform 0.2s;
}

.folder.open .folder-expander {
    transform: rotate(90deg);
}

.folder.active > .folder-header, .file.active {
    background-color: var(--secondary-color);
    font-weight: 500;
    border-radius: 4px;
}

.folder.active > .folder-header > span, .file.active > span {
    font-weight: 500;
}

.folder-icon {
    color: #e9b25d;
}

.file-icon {
    color: var(--primary-color);
}

/* Content area */
.content {
    flex: 1;
    display: flex;
    overflow: hidden;
}

.editor-container, .preview-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Editor toolbar */
.editor-toolbar {
    display: flex;
    align-items: center;
    gap: 2px;
    padding: 5px 10px;
    background-color: var(--header-bg);
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
}

.editor-toolbar button {
    background: transparent;
    border: none;
    color: var(--toolbar-icon);
    width: 32px;
    height: 32px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s;
}

.editor-toolbar button:hover {
    background-color: var(--hover-color);
}

.editor-toolbar .divider {
    width: 1px;
    height: 20px;
    background-color: var(--border-color);
    margin: 0 5px;
}

.editor-header, .preview-header {
    display: flex;
    align-items: center;
    padding: 8px 15px;
    background-color: var(--header-bg);
    border-bottom: 1px solid var(--border-color);
    font-size: 0.9rem;
    font-weight: 500;
    justify-content: space-between;
}

.editor-status {
    display: flex;
    gap: 15px;
    font-size: 0.8rem;
    color: var(--toolbar-icon);
}

#auto-save-status {
    color: #48a868;
    cursor: pointer;
    transition: color 0.2s;
    padding: 2px 5px;
    border-radius: 3px;
}

#auto-save-status:hover {
    background-color: rgba(0, 0, 0, 0.1);
}

#markdown-input {
    flex: 1;
    border: none;
    resize: none;
    padding: 15px;
    outline: none;
    font-family: 'Consolas', 'Courier New', monospace;
    font-size: 0.95rem;
    line-height: 1.5;
    background-color: var(--editor-bg);
    color: var(--text-color);
    transition: border 0.3s;
}

#markdown-input.highlight {
    background-color: rgba(65, 105, 225, 0.1);
    border: 2px dashed var(--primary-color);
}

.preview {
    flex: 1;
    padding: 15px;
    overflow-y: auto;
    background-color: var(--preview-bg);
}

/* Resizer */
.resizer {
    width: 5px;
    background-color: var(--border-color);
    cursor: col-resize;
}

/* Markdown Preview Styling */
.preview h1, .preview h2, .preview h3, .preview h4, .preview h5, .preview h6 {
    margin-top: 1.5em;
    margin-bottom: 0.5em;
    font-weight: 600;
    line-height: 1.2;
}

.preview h1 {
    font-size: 2em;
    padding-bottom: 0.3em;
    border-bottom: 1px solid var(--border-color);
}

.preview h2 {
    font-size: 1.5em;
    padding-bottom: 0.3em;
    border-bottom: 1px solid var(--border-color);
}

.preview h3 {
    font-size: 1.25em;
}

.preview h4 {
    font-size: 1em;
}

.preview h5 {
    font-size: 0.875em;
}

.preview h6 {
    font-size: 0.85em;
    color: #6a737d;
}

.preview p {
    margin-bottom: 1em;
    line-height: 1.6;
}

.preview a {
    color: var(--primary-color);
    text-decoration: none;
}

.preview a:hover {
    text-decoration: underline;
}

.preview blockquote {
    padding: 0 1em;
    color: #6a737d;
    border-left: 3px solid var(--blockquote-border);
    margin-bottom: 1em;
}

.preview ul, .preview ol {
    margin-bottom: 1em;
    padding-left: 2em;
}

.preview li {
    margin-bottom: 0.5em;
}

.preview table {
    border-collapse: collapse;
    margin-bottom: 1em;
    width: 100%;
}

.preview table th, .preview table td {
    padding: 6px 13px;
    border: 1px solid var(--border-color);
}

.preview table th {
    background-color: var(--secondary-color);
    font-weight: 600;
}

.preview img {
    max-width: 100%;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.preview pre {
    background-color: var(--code-bg);
    border-radius: 4px;
    padding: 1em;
    overflow: auto;
    margin-bottom: 1em;
}

.preview code {
    font-family: 'Consolas', 'Courier New', monospace;
    padding: 0.2em 0.4em;
    margin: 0;
    background-color: var(--code-bg);
    border-radius: 3px;
    font-size: 0.85em;
}

.preview pre code {
    padding: 0;
    background-color: transparent;
    border-radius: 0;
}

.preview hr {
    height: 0.25em;
    background-color: var(--border-color);
    border: 0;
    margin: 24px 0;
}

/* Mermaid diagram styles */
.preview .mermaid {
    background-color: var(--bg-color);
    padding: 10px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    margin-bottom: 1em;
    text-align: center;
}

/* KaTeX math formulae */
.preview .katex-display {
    margin: 1em 0;
    overflow-x: auto;
    overflow-y: hidden;
    padding-top: 0.5em;
    padding-bottom: 0.5em;
}

/* Context Menu */
.context-menu {
    position: fixed;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 5px 0;
    box-shadow: 0 2px 5px var(--shadow-color);
    z-index: 1000;
    min-width: 150px;
}

.context-menu div {
    padding: 8px 15px;
    cursor: pointer;
    font-size: 0.9rem;
}

.context-menu div:hover {
    background-color: var(--hover-color);
}

/* Save notification */
.save-notification {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: var(--primary-color);
    color: white;
    padding: 10px 20px;
    border-radius: 4px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    transform: translateY(100px);
    opacity: 0;
    transition: transform 0.3s, opacity 0.3s;
    z-index: 1000;
}

.save-notification.show {
    transform: translateY(0);
    opacity: 1;
}

/* Responsive design for smaller screens */
@media (max-width: 768px) {
    .main-container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        height: auto;
        max-height: 30vh;
    }
    
    .content {
        flex-direction: column;
    }
    
    .editor-container, .preview-container {
        height: 50vh;
    }
    
    .resizer {
        width: 100%;
        height: 5px;
        cursor: row-resize;
    }
}

.folder > .folder-contents {
    flex-basis: 100%;
    margin-top: 5px;
}

.folder-header:hover, .file:hover {
    background-color: var(--hover-color);
}