diff --git a/src/routes/networks/NetworkGraphModal.svelte b/src/routes/networks/NetworkGraphModal.svelte
new file mode 100644
index 0000000..c49f81b
--- /dev/null
+++ b/src/routes/networks/NetworkGraphModal.svelte
@@ -0,0 +1,146 @@
+<script lang="ts">
+	import { onMount } from "svelte";
+	import * as Dialog from "$lib/components/ui/dialog";
+	import CodeEditor from "$lib/components/CodeEditor.svelte";
+	import { Layers, X } from "lucide-svelte";
+	import { focusFirstInput } from "$lib/utils";
+	import { ErrorDialog } from "$lib/components/ui/error-dialog";
+	import NetworkGraphViewer from "./NetworkGraphViewer.svelte";
+	import { useSidebar } from "$lib/components/ui/sidebar/context.svelte";
+	import type { NetworkInfo } from "$lib/types";
+
+	// Get sidebar state to adjust modal positioning
+	const sidebar = useSidebar();
+
+	interface Props {
+		open: boolean;
+		networks: NetworkInfo[]; // Required for edit mode, optional for create
+		onClose: () => void;
+	}
+
+	let { open = $bindable(), networks: propNetworks, onClose }: Props = $props();
+
+	let networks = $state<NetworkInfo[]>([]);
+
+	// Form state
+	let saving = $state(false);
+	let editorTheme = $state<"light" | "dark">("dark");
+
+	// Error dialog state
+	let operationError = $state<{
+		title: string;
+		message: string;
+		details?: string;
+	} | null>(null);
+
+	// CodeEditor reference for explicit marker updates
+	let codeEditorRef: CodeEditor | null = $state(null);
+
+	// NetworkGraphViewer reference for resize on panel toggle
+	let graphViewerRef: NetworkGraphViewer | null = $state(null);
+
+	// Display title
+	const displayName = "DEMO";
+
+	onMount(() => {
+		// Load saved editor theme, or fall back to app theme / system preference
+		const savedEditorTheme = localStorage.getItem("dockhand-editor-theme");
+		if (savedEditorTheme === "dark" || savedEditorTheme === "light") {
+			editorTheme = savedEditorTheme;
+		} else {
+			const appTheme = localStorage.getItem("theme");
+			if (appTheme === "dark" || appTheme === "light") {
+				editorTheme = appTheme;
+			} else {
+				// Fallback to system preference
+				editorTheme = window.matchMedia("(prefers-color-scheme: dark)").matches ? "dark" : "light";
+			}
+		}
+	});
+
+	function tryClose() {
+		handleClose();
+	}
+
+	let containerRef: HTMLDivElement | null = $state(null);
+
+	function handleClose() {
+		// Reset mode back to prop values
+		networks = propNetworks;
+		codeEditorRef = null;
+		operationError = null;
+		onClose();
+	}
+
+	// Initialize when dialog opens - ONLY ONCE per open
+	let hasInitialized = $state(false);
+	$effect(() => {
+		if (open && !hasInitialized) {
+			hasInitialized = true;
+			// Reset mode to prop values on each open
+			networks = propNetworks;
+		} else if (!open) {
+			hasInitialized = false; // Reset when modal closes
+		}
+	});
+</script>
+
+<Dialog.Root
+	bind:open
+	onOpenChange={(isOpen) => {
+		if (isOpen) {
+			focusFirstInput();
+		} else {
+			// No unsaved changes - reset state
+			handleClose();
+		}
+	}}
+>
+	<Dialog.Content
+		class="max-w-none h-[95vh] flex flex-col p-0 gap-0 shadow-xl border-zinc-200 dark:border-zinc-700 {sidebar.state === 'collapsed'
+			? 'w-[calc(100vw-6rem)] ml-[1.5rem]'
+			: 'w-[calc(100vw-12rem)] ml-[4.5rem]'}"
+		showCloseButton={false}
+	>
+		<Dialog.Header class="px-5 py-3 border-b border-zinc-200 dark:border-zinc-700 flex-shrink-0">
+			<div class="flex items-center justify-between">
+				<div class="flex items-center gap-3">
+					<div class="flex items-center gap-2">
+						<div class="p-1.5 rounded-md bg-zinc-200 dark:bg-zinc-700">
+							<Layers class="w-4 h-4 text-zinc-600 dark:text-zinc-300" />
+						</div>
+						<div>
+							<Dialog.Title class="text-sm font-semibold text-zinc-800 dark:text-zinc-100">View network graph</Dialog.Title>
+							<Dialog.Description class="text-xs text-zinc-500 dark:text-zinc-400">View network connections between containers</Dialog.Description>
+						</div>
+					</div>
+				</div>
+
+				<div class="flex items-center gap-2">
+					<!-- Close button -->
+					<button
+						onclick={tryClose}
+						class="p-1.5 rounded-md text-zinc-400 dark:text-zinc-500 hover:text-zinc-600 dark:hover:text-zinc-300 hover:bg-zinc-200 dark:hover:bg-zinc-700 transition-colors"
+					>
+						<X class="w-4 h-4" />
+					</button>
+				</div>
+			</div>
+		</Dialog.Header>
+
+		<!-- Content area -->
+		<div bind:this={containerRef} class="flex-1 min-h-0 flex flex-col">
+			<!-- Graph tab: Full width -->
+			<NetworkGraphViewer bind:this={graphViewerRef} {networks} class="h-full flex-1" />
+		</div>
+
+		<!-- Footer -->
+		<div class="px-5 py-2.5 border-t border-zinc-200 dark:border-zinc-700 flex items-center justify-between flex-shrink-0" />
+	</Dialog.Content>
+</Dialog.Root>
+
+<!-- Error dialog for failed operations -->
+{#if operationError}
+	{@const errorDialogOpen = true}
+	<ErrorDialog open={errorDialogOpen} title={operationError.title} message={operationError.message} details={operationError.details} onClose={() => (operationError = null)} />
+{/if}