/* ==========================================================================
   1. IMPORTS & VARIABLES
   ========================================================================== */


			@font-face {
				font-family: 'Inter';
				font-style: normal;
				font-weight: 400;
				font-display: swap;
				src: url('./Inter-Regular.woff2') format('woff2');
			}
			@font-face {
				font-family: 'Inter';
				font-style: normal;
				font-weight: 700;
				font-display: swap;
				src: url('./Inter-Bold.woff2') format('woff2');
			}
		

:root {
    /* --- LIGHT THEME (Default) --- */
    --bg-color: #ffffff;
    --text-color: #2e3338;
    --sidebar-bg: #f5f6f8;
    --sidebar-border: #e6e6e6;
    --accent-color: #7e6df7;
    --hover-color: #e8e8e8;

    /* Palette */
    --color-red: #d14d41;
    --color-orange: #d67e22;
    --color-yellow: #dcb20a;
    --color-green: #409c5a;
    --color-blue: #4b8ad6;
    --color-purple: #9463c6;
    --color-cyan: #3aaeb4;
    --color-comment: #9ca3af;

    --sidebar-width: 280px;
    --font-main: 'Inter', sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

/* --- DARK THEME OVERRIDES (Data Attribute) --- */
:root[data-theme="dark"] {
    --bg-color: #1e1e1e;
    --text-color: #dcddde;
    --sidebar-bg: #252526;
    --sidebar-border: #2f2f31;
    --accent-color: #7e6df7;
    --hover-color: #333333;

    /* Palette */
    --color-red: #f07178;
    --color-orange: #f78c6c;
    --color-yellow: #ffcb6b;
    --color-green: #c3e88d;
    --color-blue: #82aaff;
    --color-purple: #c792ea;
    --color-cyan: #89ddff;
    --color-comment: #6b7280;
}

/* --- DARK THEME OVERRIDES (System Preference) --- */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --bg-color: #1e1e1e;
        --text-color: #dcddde;
        --sidebar-bg: #252526;
        --sidebar-border: #2f2f31;
        --accent-color: #7e6df7;
        --hover-color: #333333;

        --color-red: #f07178;
        --color-orange: #f78c6c;
        --color-yellow: #ffcb6b;
        --color-green: #c3e88d;
        --color-blue: #82aaff;
        --color-purple: #c792ea;
        --color-cyan: #89ddff;
        --color-comment: #6b7280;
    }
}

/* ==========================================================================
   2. GLOBAL RESET & BASE STYLES
   ========================================================================== */
* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: var(--font-main);
    background-color: var(--bg-color);
    color: var(--text-color);
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden; /* Prevent horizontal scroll from sidebars */
}

.content h1 { font-size: 2em; }
.content h2 { font-size: 1.5em; }
.content h3 { font-size: 1.25em; }
.content h4 { font-size: 1em; }
.content h5 { font-size: 0.875em; }
.content h6 { font-size: 0.85em; }

.sidebar-label {
    margin: 1rem 0 1rem 0;
    font-weight: bold;
}

/* Icons */
[data-lucide] {
    width: 18px;
    height: 18px;
    display: inline-block;
    vertical-align: text-bottom;
}

.canvas-node-icon {
    width: 32px !important;
    height: 32px !important;
    margin-bottom: 0.5rem;
}

/* ==========================================================================
   3. MAIN LAYOUT STRUCTURE
   ========================================================================== */
.layout {
    display: flex;
    flex: 1;
    overflow: hidden;
    position: relative;
}

/* Wrapper for the main content to stabilize flex layout during swaps */
.center-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0; /* Prevents flex overflow */
    position: relative;
}

.main-wrapper {
    display: flex;
    flex-direction: column;
    width: 100%;
    overflow: hidden; /* Prevent horizontal scroll on main */
    flex: 1;
}

.content-wrapper {
    width: 100%;
    flex: 1;
    overflow-y: auto;
    padding: 2rem 2rem 2rem 2rem;
    position: relative;
}

.content-wrapper.canvas-mode {
    padding: 0;
    overflow: hidden;
    background-color: var(--bg-color);
}

.navbar {
    border-bottom: 1px solid var(--sidebar-border);
    position: sticky;
    padding: 1rem;
    gap: 1rem;
    top: 0px;
    width: 100%;
    display: grid;
    /* Adjust grid to accommodate new right toggle */
    grid-template-columns: 26px auto 26px;
    background-color: var(--bg-color);
    z-index: 20;
}

/* ==========================================================================
   4. SIDEBARS
   ========================================================================== */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--sidebar-bg);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    z-index: 9999;
    /* transition: none !important; /* Default no transition to prevent load flash */ */
}

/* Unified transition for both desktop (margin) and mobile (transform) */
.sidebar.animate-ready {
    /* transition: margin-left 0.3s ease, margin-right 0.3s ease, transform 0.3s ease !important; */
}

/* Left Sidebar Specifics */
.sidebar.left-sidebar {
    border-right: 1px solid var(--sidebar-border);
}

.sidebar.left-sidebar.collapsed {
    display: none !important;
    /* margin-left: calc(var(--sidebar-width) * -1); */
}

/* Right Sidebar Specifics */
.sidebar.right-sidebar {
    border-left: 1px solid var(--sidebar-border);
}

.sidebar.right-sidebar.collapsed {
    display: none !important;
    /* margin-right: calc(var(--sidebar-width) * -1); */
}

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

.sidebar-content {
    overflow-y: auto;
    padding: 1rem;
    flex: 1;
}

.sidebar-home-link {
    text-decoration: none;
    color: var(--text-color);
    display: block;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.95rem;
    /* transition: color 0.2s; */
}

.sidebar-home-link:hover {
    color: var(--hover-color);
}

/* Sidebar Lists */
.sidebar ul {
    list-style: none;
    padding-left: 0;
    margin: 0;
}

.sidebar li {
    margin: 2px 0;
}

.sidebar ul li a {
    text-decoration: none;
    color: var(--text-color);
    display: block;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.85rem;
    padding-left: 1.8rem;
    /* transition: color 0.2s; */
}

.sidebar ul li a:hover {
    color: var(--hover-color);
}

.sidebar ul li a.active {
    color: var(--accent-color);
    font-weight: 500;
}

/* Sidebar Details/Summary */
.sidebar details summary {
    cursor: pointer;
    list-style: none;
    padding: 4px 8px;
    border-radius: 4px;
    position: relative;
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-color);
    padding-left: 1.8rem;
}

.sidebar details summary::-webkit-details-marker {
    display: none;
}

.sidebar details summary::before {
    content: '';
    position: absolute;
    left: 0.5rem;
    top: 50%;
    transform: translateY(-50%);
    padding: 0.2rem;
    width: 0.6rem;
    height: 0.6rem;
    background-color: #88888888;
    -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m9 18 6-6-6-6'/%3E%3C/svg%3E");
    mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m9 18 6-6-6-6'/%3E%3C/svg%3E");
    -webkit-mask-repeat: no-repeat;
    mask-repeat: no-repeat;
    -webkit-mask-position: center;
    mask-position: center;
    transition: transform 0.2s;
}

.sidebar details[open] > summary::before {
    transform: translateY(-50%) rotate(90deg);
}

.sidebar details ul {
    padding-left: 10px;
    border-left: 1px solid var(--sidebar-border);
    margin-left: 0.9rem;
}

.sidebar .close-btn {
    display: none;
}

/* ==========================================================================
   5. BUTTONS & CONTROLS
   ========================================================================== */
/* Sidebar Toggles */
.sidebar-toggle {
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 0;
    color: var(--text-color);
    transition: color 0.2s;
    width: 26px;
    height: 26px;
    padding: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
}

.sidebar-toggle-navbar {
    display: none;
}

.sidebar-actions {
    display: flex;
    align-items: center;
    gap: 4px;
}

.sidebar-toggle::before {
    content: '';
    position: absolute;
    width: 18px;
    height: 18px;
    background-color: currentColor;
    opacity: 0.7;
    -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect width='18' height='18' x='3' y='3' rx='2' ry='2'/%3E%3Cline x1='9' x2='9' y1='3' y2='21'/%3E%3C/svg%3E");
    mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect width='18' height='18' x='3' y='3' rx='2' ry='2'/%3E%3Cline x1='9' x2='9' y1='3' y2='21'/%3E%3C/svg%3E");
    -webkit-mask-repeat: no-repeat;
    mask-repeat: no-repeat;
    -webkit-mask-position: center;
    mask-position: center;
    -webkit-mask-size: contain;
    mask-size: contain;
}

.sidebar-toggle:hover {
    color: var(--accent-color);
    background-color: var(--hover-color);
}

.sidebar-toggle:hover::before {
    opacity: 1;
}

/* Theme Toggle */
#theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-color);
    opacity: 0.7;
    padding: 4px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.2s, background-color 0.2s;
}

#theme-toggle:hover {
    opacity: 1;
    background-color: var(--hover-color);
}

#theme-toggle .moon-icon { display: none; }
#theme-toggle .sun-icon { display: block; }

:root[data-theme="dark"] #theme-toggle .sun-icon { display: none !important; }
:root[data-theme="dark"] #theme-toggle .moon-icon { display: block !important; }
:root[data-theme="light"] #theme-toggle .sun-icon { display: block !important; }
:root[data-theme="light"] #theme-toggle .moon-icon { display: none !important; }

/* ==========================================================================
   6. MARKDOWN CONTENT STYLING
   ========================================================================== */
.content {
    max-width: 65ch;
    margin: 0 auto;
    line-height: 1.6;
}

.content h1, .content h2 {
    border-bottom: 1px solid var(--sidebar-border);
    padding-bottom: 0.3rem;
    margin-bottom: 1rem;
    margin-top: 1.5rem;
}

.content h1 { margin-top: 0; }
.content img { max-width: 100%; border-radius: 4px; }
.content a { color: var(--accent-color); text-decoration: none; }
.content a:hover { text-decoration: underline; }

.content a[href^="http"]:not([href*="localhost"])::after {
    content: " ↗";
    font-size: 0.8em;
    opacity: 0.7;
    display: inline-block;
    margin-left: 2px;
}

.content ol, .content ul { padding-left: 1.5rem; }
.content ol li::marker { color: #888; font-weight: normal; font-size: 1em; }
.content li input[type="checkbox"] { margin-right: 0.5em; }
.content ul li:has(input[type="checkbox"]) { list-style-type: none; margin-left: -1rem; }
.content blockquote:not(.callout) {
    border-left: 4px solid var(--accent-color);
    margin: 0;
    padding-left: 1rem;
    color: #888;
}

.content table {
    border-collapse: collapse;
    width: 100%;
    margin: 1rem 0;
    border: 1px solid var(--sidebar-border);
}

.content th, .content td {
    border: 1px solid var(--sidebar-border);
    padding: 8px 12px;
    text-align: left;
}

.content th { background-color: var(--sidebar-bg); font-weight: 600; }
.content tr:nth-child(even) { background-color: rgba(0,0,0,0.02); }
mark { background-color: color-mix(in srgb, var(--color-yellow), transparent 70%); color: inherit; border-radius: 2px; padding: 0 2px; }

/* Callouts */
.callout {
    overflow: hidden;
    margin: 1em 0;
    padding: 0;
    border: 1px solid color-mix(in srgb, var(--callout-color), transparent 75%);
    background-color: color-mix(in srgb, var(--callout-color), transparent 90%);
    border-radius: 4px;
}

.content blockquote.callout {
    border-left: none !important;
    padding-left: 0 !important;
    margin: 1em 0;
    color: inherit;
}

.callout-title {
    padding: 0.5em 1em;
    display: flex;
    align-items: center;
    gap: 0.5em;
    background-color: color-mix(in srgb, var(--callout-color), transparent 90%);
    font-weight: bold;
    color: var(--callout-color);
}

details.callout > summary { list-style: none; cursor: pointer; }
details.callout > summary::-webkit-details-marker { display: none; }
details.callout > summary .callout-title::after { content: '›'; margin-left: auto; font-size: 1.2em; transition: transform 0.2s; }
details.callout[open] > summary .callout-title::after { transform: rotate(90deg); }
.callout-icon { display: flex; align-items: center; }
.callout-title .callout-icon svg { width: 18px; height: 18px; vertical-align: text-bottom; }
.callout p { padding: 0.5em 1em; margin: 0; color: var(--text-color); }

.callout[data-callout="note"], .callout[data-callout="info"], .callout[data-callout="todo"] { --callout-color: var(--color-blue); }
.callout[data-callout="abstract"], .callout[data-callout="summary"], .callout[data-callout="tldr"] { --callout-color: var(--color-cyan); }
.callout[data-callout="tip"], .callout[data-callout="hint"], .callout[data-callout="important"] { --callout-color: var(--color-cyan); }
.callout[data-callout="success"], .callout[data-callout="check"], .callout[data-callout="done"] { --callout-color: var(--color-green); }
.callout[data-callout="question"], .callout[data-callout="help"], .callout[data-callout="faq"] { --callout-color: var(--color-orange); }
.callout[data-callout="warning"], .callout[data-callout="caution"], .callout[data-callout="attention"] { --callout-color: var(--color-orange); }
.callout[data-callout="failure"], .callout[data-callout="fail"], .callout[data-callout="missing"] { --callout-color: var(--color-red); }
.callout[data-callout="danger"], .callout[data-callout="error"] { --callout-color: var(--color-red); }
.callout[data-callout="bug"] { --callout-color: var(--color-red); }
.callout[data-callout="example"] { --callout-color: var(--color-purple); }
.callout[data-callout="quote"], .callout[data-callout="cite"] { --callout-color: var(--text-color); }

/* Syntax Highlighting (Chroma) */
.chroma {
    color: var(--text-color);
    background-color: var(--sidebar-bg);
    padding: 1em;
    border-radius: 4px;
    overflow-x: auto;
    position: relative;
    font-size: 0.95rem;
}

.copy-code-btn {
    position: absolute;
    top: 0.5em;
    right: 0.5em;
    background-color: var(--bg-color);
    color: var(--text-color);
    border: 1px solid var(--sidebar-border);
    border-radius: 4px;
    padding: 4px 8px;
    font-size: 0.8rem;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.2s, background-color 0.2s;
    z-index: 10;
}

.chroma:hover .copy-code-btn { opacity: 1; }
.copy-code-btn:hover { background-color: var(--hover-color); color: var(--accent-color); }

.chroma .k { color: var(--color-purple); font-weight: bold; }
.chroma .kt { color: var(--color-yellow); }
.chroma .n { color: var(--text-color); }
.chroma .nc { color: var(--color-green); }
.chroma .nf { color: var(--color-blue); }
.chroma .s, .chroma .sa, .chroma .sb, .chroma .sc, .chroma .dl, .chroma .sd, .chroma .s2, .chroma .se, .chroma .sh, .chroma .si, .chroma .sx, .chroma .sr, .chroma .s1, .chroma .ss { color: var(--color-green); }
.chroma .c, .chroma .c1, .chroma .cs, .chroma .cm { color: var(--color-comment); font-style: italic; }
.chroma .o, .chroma .ow { color: var(--color-cyan); }

/* Breadcrumbs */
.breadcrumbs {
    text-align: center;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}

/* ==========================================================================
   7. GRAPH & TABLE OF CONTENTS
   ========================================================================== */
#global-graph-container {
    width: 100%;
    height: 100%;
}

#local-graph-container {
    width: 100%;
    height: 300px;
    border: 1px solid var(--sidebar-border);
    border-radius: 8px;
    margin-bottom: 1rem;
    position: relative;
    background: var(--bg-color);
}

.graph-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.graph-controls {
    display: flex;
    gap: 4px;
}

.graph-btn {
    margin: 0px !important;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-color);
    opacity: 0.7;
    padding: 4px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.2s, background-color 0.2s;
    text-decoration: none;
}

.graph-btn:hover {
    opacity: 1;
    background-color: var(--hover-color);
    color: var(--accent-color);
}

/* Expanded Graph Mode */
.local-graph-wrapper.expanded #local-graph-container {
    position: fixed;
    top: 5vh;
    left: 5vw;
    width: 90vw;
    height: 90vh;
    z-index: 10000;
    border: 2px solid var(--accent-color);
    box-shadow: 0 0 50px rgba(0,0,0,0.5);
}

.local-graph-wrapper.expanded::before {
    content: '';
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.6);
    z-index: 9999;
    backdrop-filter: blur(2px);
}

.local-graph-wrapper.expanded .graph-header {
    position: fixed;
    top: calc(5vh + 10px);
    right: calc(5vw + 10px);
    z-index: 10001;
    width: auto;
    margin: 0;
}

.local-graph-wrapper.expanded .sidebar-label {
    display: none;
}

/* Table of Contents */
.toc {
    font-size: 0.85rem;
    line-height: 1.4;
    padding: 1rem 0;
}

.toc ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.toc a {
    text-decoration: none;
    color: var(--accent-color);
    opacity: 0.85;
    display: block;
    padding: 0.35rem 0;
    /* transition: all 0.2s ease; */
}

.toc a:hover {
    opacity: 1;
    color: var(--text-color);
}

.toc-level-1 {
    font-weight: 600;
    margin-top: 0.5rem;
    margin-bottom: 0.25rem;
    /* color: var(--text-color); */
    /* opacity: 0.9; */
}

.toc-level-2 {
    border-left: 2px solid var(--sidebar-border);
    margin-left: 0.25rem;
}
.toc-level-2 a { margin-left: 1.5rem; }

.toc-level-3 {
    border-left: 2px solid var(--sidebar-border);
    margin-left: 0.25rem;
}
.toc-level-3 a { margin-left: 1.75rem; padding-left: 1.5rem; border-left: 2px solid var(--sidebar-border); }

.toc-level-4, .toc-level-5, .toc-level-6 { display: none; }


/* ==========================================================================
   8. MEDIA QUERIES
   ========================================================================== */
@media screen and (max-width: 768px) {
    .sidebar-toggle-navbar {
        display: flex;
    }
}

@media (max-width: 768px) {
    /* General Mobile Sidebar */
    .sidebar {
        position: absolute;
        height: 100%;
        width: 100%; /* Force full width on mobile */
        top: 0;
        z-index: 50;
        box-shadow: none;
        transform: translateX(0);
    }

    /* Left Sidebar Mobile */
    .sidebar.left-sidebar {
        margin-left: 0;
        left: 0;
    }
    .sidebar.left-sidebar.collapsed {
        transform: translateX(-100%);
        margin-left: 0;
    }

    /* Right Sidebar Mobile */
    .sidebar.right-sidebar {
        right: 0;
        border-left: none;
        margin-right: 0;
    }
    .sidebar.right-sidebar.collapsed {
        transform: translateX(100%);
        margin-right: 0;
    }

    .content-wrapper { padding-top: 3.5rem; padding-left: 2rem; padding-right: 2rem; }
    .content-wrapper.canvas-mode { padding-top: 0; padding-left: 0; padding-right: 0; }
}

/* ==========================================================================
   9. CANVAS SPECIFIC STYLES
   ========================================================================== */
#viewport {
    width: 100%;
    height: 100%;
    overflow: hidden;
    cursor: grab;
    position: relative;
    touch-action: none;
}

#viewport:active { cursor: grabbing; }

#canvas-world {
    position: absolute;
    top: 0;
    left: 0;
    transform-origin: 0 0;
    will-change: transform;
}

.node {
    position: absolute;
    background: var(--bg-color);
    border: 2px solid var(--sidebar-border);
    border-radius: 8px;
    padding: 0;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    /* transition: box-shadow 0.2s; */
    font-size: 1rem;
    overflow-y: auto;
}

.node p { margin: 0px; }
.node-note { padding: 16px; }

.node-title-link {
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
    margin-right: 8px;
    flex: 1;
}

.node-content-scroll {
    padding: 10px;
    overflow-y: auto;
    flex: 1;
    width: 100%;
    text-align: left;
}

.node-content-center {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-align: center;
    padding: 10px;
}

/* Canvas Dark Mode Tweaks */
:root[data-theme="dark"] .node,
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .node {
        background: var(--sidebar-bg);
        border-color: var(--sidebar-border);
    }
}

/* Canvas Colors */
.color-1 { border-color: var(--color-red) !important; background-color: color-mix(in srgb, var(--color-red), transparent 90%) !important; }
.color-2 { border-color: var(--color-orange) !important; background-color: color-mix(in srgb, var(--color-orange), transparent 90%) !important; }
.color-3 { border-color: var(--color-yellow) !important; background-color: color-mix(in srgb, var(--color-yellow), transparent 90%) !important; }
.color-4 { border-color: var(--color-green) !important; background-color: color-mix(in srgb, var(--color-green), transparent 90%) !important; }
.color-5 { border-color: var(--color-cyan) !important; background-color: color-mix(in srgb, var(--color-cyan), transparent 90%) !important; }
.color-6 { border-color: var(--color-purple) !important; background-color: color-mix(in srgb, var(--color-purple), transparent 90%) !important; }

/* Canvas Group */
.node.group {
    background-color: rgba(243, 244, 246, 0.5);
    border: 2px dashed #d1d5db;
    box-shadow: none;
    pointer-events: none;
    z-index: 0;
    padding: 1rem;
    overflow: visible !important;
    align-items: flex-start;
    justify-content: flex-start;
    text-align: left;
}

:root[data-theme="dark"] .node.group {
    border-color: #444;
    background-color: rgba(255,255,255,0.05);
}

.node:not(.group) { z-index: 10; }

#edges-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 1px;
    height: 1px;
    overflow: visible;
    z-index: 1;
    pointer-events: none;
}

/* Arrow Marker Styling */
#arrow-head path { fill: #9ca3af; }
path.edge { fill: none; stroke: #9ca3af; stroke-width: 3px; marker-end: url(#arrow-head); }

/* Canvas UI Controls */
#canvas-controls {
    position: absolute;
    bottom: 20px;
    right: 20px;
    z-index: 100;
    display: flex;
    gap: 8px;
    background: var(--bg-color);
    padding: 6px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    border: 1px solid var(--sidebar-border);
}

.canvas-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: 4px;
    color: var(--text-color);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    font-size: 0;
    width: 26px;
    height: 26px;
}

.canvas-btn:hover {
    background-color: var(--hover-color);
    color: var(--accent-color);
}

.canvas-btn::before {
    content: '';
    position: absolute;
    width: 18px;
    height: 18px;
    background-color: currentColor;
    -webkit-mask-repeat: no-repeat;
    mask-repeat: no-repeat;
    -webkit-mask-position: center;
    mask-position: center;
    -webkit-mask-size: contain;
    mask-size: contain;
}

.icon-minus::before {
    -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12h14'/%3E%3C/svg%3E");
    mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12h14'/%3E%3C/svg%3E");
}

.icon-maximize::before {
    -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M8 3H5a2 2 0 0 0-2 2v3'/%3E%3Cpath d='M21 8V5a2 2 0 0 0-2-2h-3'/%3E%3Cpath d='M3 16v3a2 2 0 0 0 2 2h3'/%3E%3Cpath d='M16 21h3a2 2 0 0 0 2-2v-3'/%3E%3C/svg%3E");
    mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M8 3H5a2 2 0 0 0-2 2v3'/%3E%3Cpath d='M21 8V5a2 2 0 0 0-2-2h-3'/%3E%3Cpath d='M3 16v3a2 2 0 0 0 2 2h3'/%3E%3Cpath d='M16 21h3a2 2 0 0 0 2-2v-3'/%3E%3C/svg%3E");
}

.icon-plus::before {
    -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12h14'/%3E%3Cpath d='M12 5v14'/%3E%3C/svg%3E");
    mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12h14'/%3E%3Cpath d='M12 5v14'/%3E%3C/svg%3E");
}

/* Canvas Internal Node Items */
.canvas-node-image {
    overflow: hidden;
    border: none;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
}

.canvas-node-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.canvas-node-header {
    position: absolute;
    height: 24px;
    top: -24px;
    width: 100%;
    padding: 8px 0px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: grab;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.canvas-node-header a {
    color: inherit;
    text-decoration: none;
}

.canvas-node-header a:hover {
    text-decoration: underline !important;
}

.canvas-node-content-box {
    border-radius: 8px;
    border: 2px solid var(--sidebar-border);
    width: 100%;
    height: 100%;
    overflow-y: scroll;
    position: relative;
}

.canvas-node-loading-note {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-color);
}

.canvas-node-fallback {
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-color);
    padding: 0.5rem;
    text-align: center;
}

.canvas-node-fallback span {
    font-family: monospace;
    font-size: 0.8rem;
    word-break: break-all;
}

.canvas-node-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    padding: 1rem;
    color: var(--text-decoration);
    text-decoration: none;
    transition-property: color, background-color, border-color, text-decoration-color, fill, stroke;
    transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
    transition-duration: 150ms;
}

.canvas-node-link:hover {
    background-color: var(--background-color);
}

.canvas-node-link span {
    font-weight: 500;
    font-size: 0.8rem;
    word-break: break-all;
    text-align: center;
}

.canvas-group-label {
    position: absolute;
    top: -25px;
    left: 0;
    font-weight: bold;
    color: var(--text-color);
    text-transform: uppercase;
    font-size: 0.75rem;
    pointer-events: auto;
}