:root {
    /* Default Dark Mode */
    --sidebar-width: 280px;
    --bg-color: #191919;
    --sidebar-bg: #202020;
    --border-color: #333;
    --text-color: #d4d4d4;
    --active-color: #2d2d2d;
    --hover-color: #2a2a2a;
    --accent-color: #2e8b57;
    --code-bg: #111;
    --code-text: #e1e4e8;
    --blockquote-border: #444;
    --table-border: #444;
    --table-stripe: #252525;
    --link-color: #58a6ff;

    --sidebar-text: rgb(155, 155, 155);
    --sidebar-text-active: #ffffff;
    --card-bg: rgba(32, 32, 32, 0.9);
    /* Notion-like modal */
    --mermaid-bg: #2f3437;
}

[data-theme="light"] {
    --bg-color: #ffffff;
    --sidebar-bg: #f7f6f3;
    --border-color: #e1e4e8;
    --text-color: #37352f;
    --active-color: #e1e4e8;
    --hover-color: #e8e7e3;
    --accent-color: #2e8b57;
    --code-bg: rgba(27, 31, 35, 0.05);
    --code-text: #24292e;
    --blockquote-border: #dfe2e5;
    --table-border: #ddd;
    --table-stripe: #f6f8fa;
    --link-color: #0969da;

    --sidebar-text: #37352f;
    --sidebar-text-active: #000000;
    --card-bg: #ffffff;
    --mermaid-bg: #ffffff;
    --mermaid-bg: #ffffff;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    color: var(--text-color);
    background-color: var(--bg-color);
    margin: 0;
    padding: 0;
    height: 100vh;
    overflow: hidden;
    display: flex;
}

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

a:hover {
    text-decoration: underline;
}

/* Media Modal */
#media-modal {
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    /* Handle zoom/pan manually or allow scroll? Hidden is better for pan. */
    background-color: rgba(0, 0, 0, 0.9);
    display: none;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.media-modal-content {
    max-width: 90%;
    max-height: 90%;
    object-fit: contain;
    transition: transform 0.1s;
    cursor: grab;
}

.media-modal-content:active {
    cursor: grabbing;
}

.media-controls {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    background: rgba(255, 255, 255, 0.1);
    padding: 10px;
    border-radius: 20px;
    backdrop-filter: blur(5px);
}

.media-btn {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.5);
    color: white;
    padding: 5px 10px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
}

.media-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

.close-media {
    position: absolute;
    top: 15px;
    right: 35px;
    color: #f1f1f1;
    font-size: 40px;
    font-weight: bold;
    transition: 0.3s;
    cursor: pointer;
    z-index: 2001;
}

.close-media:hover,
.close-media:focus {
    color: #bbb;
    text-decoration: none;
    cursor: pointer;
}

/* Mermaid in Modal */
#media-modal .mermaid {
    background-color: var(--mermaid-bg);
    /* Use theme bg */
    padding: 20px;
    border-radius: 6px;
}


/* Sidebar */
#sidebar {
    width: var(--sidebar-width);
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    height: 100%;
    overflow-y: auto;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-color);
}

.sidebar-controls {
    display: flex;
    align-items: center;
    gap: 8px;
}

.control-btn,
.theme-toggle {
    cursor: pointer;
    font-size: 18px;
    padding: 4px 8px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    user-select: none;
}

.control-btn:hover,
.theme-toggle:hover {
    background-color: var(--hover-color);
}

.sidebar-content {
    flex: 1;
    padding: 8px 0;
    overflow-y: auto;
}

/* Collapsed Explorer */
#sidebar.collapsed {
    width: 36px;
    min-width: 36px;
}

#sidebar.collapsed .sidebar-header {
    padding: 12px 4px;
    justify-content: center;
    border-bottom: none;
}

#sidebar.collapsed .sidebar-title,
#sidebar.collapsed #btn-collapse,
#sidebar.collapsed #btn-expand,
#sidebar.collapsed #theme-toggle,
#sidebar.collapsed .sidebar-content {
    display: none;
}

#sidebar.collapsed .sidebar-controls {
    gap: 0;
}



/* Tree View */
.tree-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.tree-list li .tree-list {
    padding-left: 16px;
    display: none;
}

.tree-list li .tree-list.expanded {
    display: block;
}

.tree-item {
    cursor: pointer;
    user-select: none;
}

.tree-content {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px 8px;
    font-size: 14px;
    color: var(--sidebar-text);
    text-decoration: none;
    border-radius: 4px;
    margin: 0 8px;
    cursor: pointer;
    min-width: 0;
}

.tree-content > span:last-child {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.tree-content:hover {
    background-color: var(--hover-color);
    text-decoration: none;
}

a.tree-content,
a.tree-content:hover {
    text-decoration: none;
}

.tree-content.active {
    background-color: var(--active-color);
    color: var(--sidebar-text-active);
    font-weight: 700;
}

.arrow {
    display: inline-block;
    width: 20px;
    height: 20px;
    line-height: 20px;
    text-align: center;
    font-size: 10px;
    color: #9ca3af;
    margin-right: 4px;
    transition: transform 0.1s ease;
}

.arrow.expanded {
    transform: rotate(90deg);
}

.icon {
    margin-right: 6px;
    font-size: 16px;
}

/* Main Content */
#main {
    flex: 1;
    height: 100%;
    overflow-y: auto;
    position: relative;
    padding: 0;
}

/* Floating Toolbar */
.floating-toolbar {
    position: fixed;
    z-index: 1000;
    bottom: 20px;
    right: 20px;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 30px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    display: flex;
    flex-direction: row-reverse;
    /* Handle on right, expand left */
    align-items: center;
    transition: all 0.3s ease;
    padding: 5px;
}

#toolbar-handle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: grab;
    font-size: 1.5rem;
    user-select: none;
    transition: transform 0.2s;
}

#toolbar-handle:active {
    cursor: grabbing;
    transform: scale(0.95);
}

#toolbar-items {
    display: none;
    flex-direction: row;
    /* Buttons left-to-right inside the container */
    gap: 10px;
    margin-right: 10px;
    /* Space between handle and items */
    margin-bottom: 0;
    opacity: 0;
    transition: opacity 0.3s;
}

/* Expanded State */
.floating-toolbar.expanded #toolbar-items {
    display: flex;
    opacity: 1;
}

/* Buttons inside toolbar */
#toolbar-items button,
#toolbar-items .theme-toggle {
    background: none;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    font-size: 1.2rem;
    padding: 8px;
    border-radius: 50%;
    transition: all 0.2s;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

#toolbar-items button:hover,
#toolbar-items .theme-toggle:hover {
    background-color: var(--hover-color);
    color: var(--accent-color);
}

.markdown-editor {
    display: block;
    width: 100%;
    height: 100%;
    box-sizing: border-box;
    padding: 60px 40px;
    font-family: SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;
    font-size: 14px;
    background-color: var(--bg-color);
    color: var(--text-color);
    border: none;
    resize: none;
    outline: none;
    line-height: 1.6;
}

@media (min-width: 980px) {
    .markdown-editor {
        padding: 60px calc(50% - 450px);
    }
}

.markdown-body {
    box-sizing: border-box;
    /* max-width: 40%; */
    margin: 0 auto;
    padding: 60px 40px;
}

/* Search Modal */
#search-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    display: none;
    justify-content: center;
    align-items: flex-start;
    padding-top: 10%;
}

.modal-content {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    width: 600px;
    max-width: 90%;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    max-height: 80vh;
}

.search-input-container {
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
}

#search-input {
    width: 100%;
    border: none;
    font-size: 18px;
    outline: none;
    padding: 4px;
    background: transparent;
    color: var(--text-color);
}

.search-results {
    overflow-y: auto;
    padding: 8px 0;
}

.search-item {
    padding: 8px 16px;
    cursor: pointer;
    font-size: 14px;
    display: flex;
    flex-direction: column;
}

.search-item:hover,
.search-item.selected {
    background-color: var(--active-color);
}

.search-item .title {
    font-weight: 500;
    color: var(--text-color);
}

.search-item .path {
    font-size: 12px;
    color: #888;
}

/* Context Menu */
#context-menu {
    position: absolute;
    display: none;
    z-index: 2000;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    border-radius: 4px;
    padding: 4px 0;
    min-width: 150px;
}

.context-menu-item {
    padding: 8px 16px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-color);
}

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

/* Helper for existing content styles */
h1 {
    font-size: 2.2em;
    border-bottom: none;
}

img {
    max-width: 100%;
    border-radius: 4px;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 1em 0;
}

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

tr:nth-child(even) {
    background-color: var(--table-stripe);
}

/* Code Blocks */
pre,
code {
    font-family: SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;
    font-size: 85%;
}

code {
    background-color: var(--code-bg);
    border-radius: 6px;
    padding: 0.2em 0.4em;
    color: var(--code-text);
}

pre {
    padding: 16px;
    overflow: auto;
    font-size: 85%;
    line-height: 1.45;
    background-color: var(--code-bg);
    border-radius: 6px;
    color: var(--code-text);
    border: 1px solid var(--border-color);
}

pre code {
    background-color: transparent;
    padding: 0;
    color: inherit;
    font-size: 100%;
}

/* Mermaid */
.mermaid {
    background-color: var(--mermaid-bg);
    padding: 10px;
    border-radius: 6px;
    display: flex;
    justify-content: center;
    margin: 16px 0;
}

/* Private Content */
.private-placeholder {
    background: repeating-linear-gradient(45deg,
            var(--code-bg),
            var(--code-bg) 10px,
            var(--hover-color) 10px,
            var(--hover-color) 20px);
    color: var(--text-color);
    padding: 20px;
    text-align: center;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    font-weight: bold;
    letter-spacing: 2px;
    transition: opacity 0.2s;
}

.private-placeholder:hover {
    opacity: 0.8;
}

blockquote {
    border-left: 4px solid var(--blockquote-border);
    color: var(--text-color);
    padding-left: 1em;
    margin-left: 0;
    opacity: 0.8;
}

/* CSV Table */
.csv-table-container {
    overflow-x: auto;
}

/* Responsive */
@media (max-width: 768px) {
    #sidebar {
        position: fixed;
        left: -280px;
        transition: left 0.3s;
        z-index: 100;
    }

    #sidebar.open {
        left: 0;
    }

    .markdown-body {
        padding: 20px;
    }
}


/* --- Graph Mode Layout --- */
body.graph-mode #sidebar {
    display: none;
}

body.graph-mode #main {
    display: flex;
    flex-direction: row;
    overflow: hidden;
    /* Prevent main scrollbar */
}

body.graph-mode #graph-container {
    flex: 1;
    width: auto !important;
    /* Override inline style */
    min-width: 0;
    /* Allow shrinking */
    height: 100%;
    position: relative;
    order: 1;
    overflow: hidden;
    /* Ensure canvas doesn't expand container */
}

body.graph-mode #content {
    display: block !important;
    /* Force show even if previously hidden */
    width: 100%;
    flex-shrink: 0;
    border-left: 1px solid var(--border-color);
    order: 2;
    overflow-y: auto;
    padding: 20px;
    background: var(--bg-color);
}

/* Graph Search Overlay */
#graph-search-container {
    position: absolute;
    top: 20px;
    left: 20px;
    z-index: 10;
    width: 300px;
}

#graph-search-input {
    width: 100%;
    padding: 10px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    outline: none;
}

/* Responsive Graph Mode */
@media (max-width: 768px) {
    body.graph-mode #main {
        flex-direction: column;
    }

    body.graph-mode #content {
        width: 100%;
        height: 40%;
        border-left: none;
        border-top: 1px solid var(--border-color);
    }
}

/* General Mobile Improvements */
@media (max-width: 768px) {
    #sidebar {
        position: fixed;
        left: -280px;
        transition: left 0.3s;
        z-index: 2000;
        box-shadow: 2px 0 10px rgba(0,0,0,0.5);
    }

    #sidebar.open {
        left: 0;
    }

    .markdown-body {
        padding: 20px 15px;
        max-width: 100%; /* Full width on mobile */
    }
    
    .markdown-editor {
        padding: 20px 15px;
    }

    /* Floating Toolbar on Mobile */
    .floating-toolbar {
        bottom: 20px;
        right: 20px;
        /* Keep it floating but ensure it's on top and reachable */
        /* Maybe scale it down slightly if too big, but default size is okay */
    }
    
    /* Ensure handle doesn't conflict with text */
    #toolbar-items {
        /* Ensure items don't overflow screen */
        flex-wrap: wrap; 
    }
    
    /* Private Content Placeholder */
    .private-placeholder {
        padding: 10px;
        font-size: 0.9em;
    }
}

/* JSON Embed */
.json-embed {
    margin: 16px 0;
}
.json-title {
    margin-bottom: 8px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}
.code-container {
    position: relative;
}
.code-container.collapsed pre {
    max-height: 1725px; /* Approx 100 lines */
    overflow: hidden;
}
.code-container.collapsed .expand-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100px;
    background: linear-gradient(transparent, var(--bg-color));
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding-bottom: 10px;
}
.expand-overlay button {
    background: var(--active-color);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    font-family: inherit;
    font-size: 14px;
}
.expand-overlay button:hover {
    background-color: var(--hover-color);
}
.code-container:not(.collapsed) .expand-overlay {
    position: static;
    background: none;
    height: auto;
    margin-top: 10px;
    display: flex;
    justify-content: center;
}

/* --- Comments System --- */
.comment-highlight {
    background-color: rgba(255, 255, 0, 0.3);
    cursor: pointer;
    border-bottom: 2px solid #ffd700;
}

.comment-highlight:hover {
    background-color: rgba(255, 255, 0, 0.5);
}

#comment-btn {
    position: absolute;
    z-index: 1000;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 5px 10px;
    cursor: pointer;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    display: none;
    font-size: 14px;
}

#comment-btn:hover {
    background-color: var(--hover-color);
}

#comment-popup {
    position: absolute;
    z-index: 1001;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 10px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    display: none;
    width: 250px;
}

#comment-popup textarea {
    width: 100%;
    height: 80px;
    margin-bottom: 10px;
    background: var(--bg-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 5px;
    resize: vertical;
}

#comment-popup .actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

#comment-popup button {
    padding: 4px 10px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    background: var(--bg-color);
    color: var(--text-color);
    cursor: pointer;
}

#comment-popup button.primary {
    background: var(--active-color);
    border-color: var(--active-color);
}

.comment-list {
    margin-top: 20px;
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
}

.comment-item {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 10px;
    margin-bottom: 10px;
}

.comment-item .selection-preview {
    font-size: 0.85em;
    color: #888;
    border-left: 2px solid var(--active-color);
    padding-left: 8px;
    margin-bottom: 6px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.comment-item .comment-text {
    font-size: 1em;
}

.comment-item .timestamp {
    font-size: 0.75em;
    color: #666;
    margin-top: 4px;
    text-align: right;
}

/* --- Comment Tooltips --- */
.comment-marker {
    background-color: rgba(255, 255, 0, 0.3);
    border-bottom: 2px solid #ffd700;
    cursor: pointer;
    position: relative;
    text-decoration: none;
    color: inherit;
}
/* CSS Tooltip removed in favor of JS Interactive Tooltip */

.btn-edit-comment {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-color);
    border-radius: 4px;
    padding: 2px 8px;
    font-size: 11px;
    cursor: pointer;
    opacity: 0.7;
    transition: opacity 0.2s;
}

.btn-edit-comment:hover {
    opacity: 1;
    background-color: var(--hover-color);
}

#comment-hover-tooltip {
    position: absolute;
    z-index: 10000;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    padding: 10px;
    min-width: 200px;
    max-width: 300px;
    display: none;
    font-size: 14px;
    color: var(--text-color);
}

#comment-hover-tooltip .tooltip-content {
    margin-bottom: 10px;
    line-height: 1.4;
}

#comment-hover-tooltip .tooltip-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    border-top: 1px solid var(--border-color);
    padding-top: 8px;
}

#comment-hover-tooltip button {
    padding: 4px 8px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    background: transparent;
    color: var(--text-color);
    cursor: pointer;
    font-size: 12px;
}

#comment-hover-tooltip button:hover {
    background-color: var(--hover-color);
}

#comment-hover-tooltip button.delete-btn {
    color: #ff4d4f;
    border-color: #ff4d4f;
}

#comment-hover-tooltip button.delete-btn:hover {
    background-color: rgba(255, 77, 79, 0.1);
}

/* --- Modal System --- */
.modal-link-btn {
    background: var(--active-color);
    border: none;
    color: var(--text-color);
    padding: 4px 10px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9em;
    transition: opacity 0.2s;
}
.modal-link-btn:hover {
    opacity: 0.8;
}

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-window {
    width: 80%;
    height: 80%;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    box-shadow: 0 4px 20px rgba(0,0,0,0.5);
    color: var(--text-color);
}

.modal-header {
    padding: 10px 15px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--card-bg);
    border-radius: 8px 8px 0 0;
}

.modal-controls button {
    margin-left: 5px;
    padding: 4px 10px;
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-color);
    border-radius: 4px;
    cursor: pointer;
}

.modal-controls button.active {
    background: var(--active-color);
    border-color: var(--active-color);
}

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

.modal-body {
    flex: 1;
    overflow: auto;
    position: relative;
    padding: 0; /* Let content handle padding */
}

#modal-view-content {
    height: 100%;
    box-sizing: border-box;
}

#modal-edit-content {
    background: var(--bg-color);
    color: var(--text-color);
    border: none;
    resize: none;
    padding: 15px;
    outline: none;
    box-sizing: border-box;
}

/* Ensure modal buttons are distinct */
#modal-btn-save {
    background: var(--active-color);
    border: none;
    color: var(--text-color);
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
}