feat: remove dark mode support

Remove ThemeToggle component, theme store, dark: Tailwind variants,
and dark color values from NOTE_COLORS. Simplify color logic to use
a single bg property. Delete dark mode e2e tests.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/lib/components/Checklist.svelte

@@ -91,7 +91,7 @@
 				value={item.text}
 				oninput={(e) => updateText(index, (e.target as HTMLInputElement).value)}
 				onkeydown={(e) => handleKeydown(e, index)}
-				class="flex-1 bg-transparent text-sm outline-none {item.checked ? 'text-gray-400 line-through' : 'text-gray-800 dark:text-gray-200'}"
+				class="flex-1 bg-transparent text-sm outline-none {item.checked ? 'text-gray-400 line-through' : 'text-gray-800'}"
 				placeholder="List item"
 				data-testid="checklist-input"
 			/>
@@ -109,7 +109,7 @@
 	{/each}
 	<button
 		onclick={() => addItem(items.length - 1)}
-		class="flex items-center gap-2 text-sm text-gray-500 hover:text-gray-700 dark:hover:text-gray-300"
+		class="flex items-center gap-2 text-sm text-gray-500 hover:text-gray-700"
 		data-testid="checklist-add"
 	>
 		<svg class="h-4 w-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">

src/lib/components/ColorPicker.svelte

@@ -1,6 +1,5 @@
 <script lang="ts">
 	import { NOTE_COLORS, COLOR_OPTIONS } from '$lib/utils/colors.js';
-	import { effectiveTheme } from '$lib/stores/theme.js';
 	import type { NoteColor } from '$lib/types/index.js';
 
 	interface Props {
@@ -16,8 +15,8 @@
 		{@const colors = NOTE_COLORS[option.value]}
 		<button
 			onclick={() => onSelect(option.value)}
-			class="h-8 w-8 rounded-full border-2 transition-transform hover:scale-110 {selected === option.value ? 'border-gray-800 dark:border-white' : 'border-transparent'}"
-			style="background-color: {$effectiveTheme === 'dark' ? colors.dark : colors.light}"
+			class="h-8 w-8 rounded-full border-2 transition-transform hover:scale-110 {selected === option.value ? 'border-gray-800' : 'border-transparent'}"
+			style="background-color: {colors.bg}"
 			title={option.label}
 			data-testid="color-{option.value}"
 		></button>

src/lib/components/FormattingToolbar.svelte

@@ -80,15 +80,15 @@
 	const chevronSize = 14;
 
 	function btnClass(active: boolean = false, disabled: boolean = false): string {
-		return `rounded p-1.5 text-gray-600 hover:bg-black/10 dark:text-gray-400 dark:hover:bg-white/10 ${active ? 'bg-black/10 dark:bg-white/10' : ''} ${disabled ? 'opacity-30' : ''}`;
+		return `rounded p-1.5 text-gray-600 hover:bg-black/10 ${active ? 'bg-black/10' : ''} ${disabled ? 'opacity-30' : ''}`;
 	}
 
 	function dropdownBtnClass(active: boolean = false): string {
-		return `flex items-center gap-0.5 rounded p-1.5 text-gray-600 hover:bg-black/10 dark:text-gray-400 dark:hover:bg-white/10 ${active ? 'bg-black/10 dark:bg-white/10' : ''}`;
+		return `flex items-center gap-0.5 rounded p-1.5 text-gray-600 hover:bg-black/10 ${active ? 'bg-black/10' : ''}`;
 	}
 
 	function dropdownItemClass(active: boolean = false): string {
-		return `flex w-full items-center gap-2 rounded px-3 py-1.5 text-sm text-gray-700 hover:bg-black/5 dark:text-gray-300 dark:hover:bg-white/10 ${active ? 'bg-black/5 dark:bg-white/10' : ''}`;
+		return `flex w-full items-center gap-2 rounded px-3 py-1.5 text-sm text-gray-700 hover:bg-black/5 ${active ? 'bg-black/5' : ''}`;
 	}
 
 	function handlePointerDown(event: PointerEvent) {
@@ -109,7 +109,7 @@
 <svelte:document onpointerdown={handlePointerDown} onkeydown={handleKeydown} />
 
 <div
-	class="flex flex-wrap items-center gap-0.5 border-b border-gray-200/50 px-2 py-1 dark:border-gray-700/50"
+	class="flex flex-wrap items-center gap-0.5 border-b border-gray-200/50 px-2 py-1"
 	data-testid="formatting-toolbar"
 >
 	<!-- History -->
@@ -132,7 +132,7 @@
 		<Redo2 size={iconSize} />
 	</button>
 
-	<div class="mx-1 h-4 w-px bg-gray-300 dark:bg-gray-600"></div>
+	<div class="mx-1 h-4 w-px bg-gray-300"></div>
 
 	<!-- Heading dropdown -->
 	<div class="relative" data-dropdown="heading">
@@ -146,7 +146,7 @@
 			<ChevronDown size={chevronSize} />
 		</button>
 		{#if openDropdown === 'heading'}
-			<div class="absolute left-0 top-full z-50 mt-1 min-w-[150px] rounded-lg border border-gray-200 bg-white py-1 shadow-lg dark:border-gray-700 dark:bg-gray-800">
+			<div class="absolute left-0 top-full z-50 mt-1 min-w-[150px] rounded-lg border border-gray-200 bg-white py-1 shadow-lg">
 				<button
 					onclick={() => { editor?.chain().focus().toggleHeading({ level: 1 }).run(); closeDropdowns(); }}
 					class={dropdownItemClass(editor?.isActive('heading', { level: 1 }) ?? false)}
@@ -187,7 +187,7 @@
 			<ChevronDown size={chevronSize} />
 		</button>
 		{#if openDropdown === 'list'}
-			<div class="absolute left-0 top-full z-50 mt-1 min-w-[170px] rounded-lg border border-gray-200 bg-white py-1 shadow-lg dark:border-gray-700 dark:bg-gray-800">
+			<div class="absolute left-0 top-full z-50 mt-1 min-w-[170px] rounded-lg border border-gray-200 bg-white py-1 shadow-lg">
 				<button
 					onclick={() => { editor?.chain().focus().toggleBulletList().run(); closeDropdowns(); }}
 					class={dropdownItemClass(editor?.isActive('bulletList') ?? false)}
@@ -225,7 +225,7 @@
 		<CodeXml size={iconSize} />
 	</button>
 
-	<div class="mx-1 h-4 w-px bg-gray-300 dark:bg-gray-600"></div>
+	<div class="mx-1 h-4 w-px bg-gray-300"></div>
 
 	<!-- Inline -->
 	<button
@@ -280,7 +280,7 @@
 			<Link size={iconSize} />
 		</button>
 		{#if openDropdown === 'link'}
-			<div class="absolute left-1/2 top-full z-50 mt-1 -translate-x-1/2 rounded-lg border border-gray-200 bg-white px-2 py-1.5 shadow-lg dark:border-gray-700 dark:bg-gray-800">
+			<div class="absolute left-1/2 top-full z-50 mt-1 -translate-x-1/2 rounded-lg border border-gray-200 bg-white px-2 py-1.5 shadow-lg">
 				<form
 					class="flex items-center gap-1"
 					onsubmit={(e) => { e.preventDefault(); applyLink(); }}
@@ -290,23 +290,23 @@
 						bind:value={linkUrl}
 						type="url"
 						placeholder="Paste a link..."
-						class="w-44 bg-transparent px-1.5 py-1 text-sm text-gray-700 outline-none placeholder:text-gray-400 dark:text-gray-300 dark:placeholder:text-gray-500"
+						class="w-44 bg-transparent px-1.5 py-1 text-sm text-gray-700 outline-none placeholder:text-gray-400"
 						data-testid="format-link-input"
 					/>
 					<button
 						type="submit"
-						class="rounded p-1 text-gray-400 hover:bg-black/5 hover:text-gray-600 dark:hover:bg-white/10 dark:hover:text-gray-300"
+						class="rounded p-1 text-gray-400 hover:bg-black/5 hover:text-gray-600"
 						title="Apply link"
 						data-testid="format-link-apply"
 					>
 						<CornerDownLeft size={16} />
 					</button>
-					<div class="mx-0.5 h-4 w-px bg-gray-300 dark:bg-gray-600"></div>
+					<div class="mx-0.5 h-4 w-px bg-gray-300"></div>
 					<button
 						type="button"
 						onclick={openLink}
 						disabled={!editor?.getAttributes('link').href}
-						class="rounded p-1 text-gray-400 hover:bg-black/5 hover:text-gray-600 disabled:opacity-30 dark:hover:bg-white/10 dark:hover:text-gray-300"
+						class="rounded p-1 text-gray-400 hover:bg-black/5 hover:text-gray-600 disabled:opacity-30"
 						title="Open link"
 						data-testid="format-link-open"
 					>
@@ -316,7 +316,7 @@
 						type="button"
 						onclick={removeLink}
 						disabled={!editor?.isActive('link')}
-						class="rounded p-1 text-gray-400 hover:bg-black/5 hover:text-red-500 disabled:opacity-30 dark:hover:bg-white/10 dark:hover:text-red-400"
+						class="rounded p-1 text-gray-400 hover:bg-black/5 hover:text-red-500 disabled:opacity-30"
 						title="Remove link"
 						data-testid="format-unlink"
 					>
@@ -327,7 +327,7 @@
 		{/if}
 	</div>
 
-	<div class="mx-1 h-4 w-px bg-gray-300 dark:bg-gray-600"></div>
+	<div class="mx-1 h-4 w-px bg-gray-300"></div>
 
 	<!-- Align dropdown -->
 	<div class="relative" data-dropdown="align">
@@ -341,7 +341,7 @@
 			<ChevronDown size={chevronSize} />
 		</button>
 		{#if openDropdown === 'align'}
-			<div class="absolute left-0 top-full z-50 mt-1 min-w-[150px] rounded-lg border border-gray-200 bg-white py-1 shadow-lg dark:border-gray-700 dark:bg-gray-800">
+			<div class="absolute left-0 top-full z-50 mt-1 min-w-[150px] rounded-lg border border-gray-200 bg-white py-1 shadow-lg">
 				<button
 					onclick={() => { editor?.chain().focus().setTextAlign('left').run(); closeDropdowns(); }}
 					class={dropdownItemClass(editor?.isActive({ textAlign: 'left' }) ?? false)}
@@ -378,7 +378,7 @@
 		{/if}
 	</div>
 
-	<div class="mx-1 h-4 w-px bg-gray-300 dark:bg-gray-600"></div>
+	<div class="mx-1 h-4 w-px bg-gray-300"></div>
 
 	<!-- Insert -->
 	<button

src/lib/components/ImageUpload.svelte

@@ -80,7 +80,7 @@
 
 	<!-- Upload area -->
 	<div
-		class="rounded-lg border-2 border-dashed p-4 text-center transition-colors {dragOver ? 'border-amber-500 bg-amber-50 dark:bg-amber-900/20' : 'border-gray-300 dark:border-gray-600'}"
+		class="rounded-lg border-2 border-dashed p-4 text-center transition-colors {dragOver ? 'border-amber-500 bg-amber-50' : 'border-gray-300'}"
 		ondrop={handleDrop}
 		ondragover={handleDragOver}
 		ondragleave={() => (dragOver = false)}

src/lib/components/Layout/Header.svelte

@@ -1,6 +1,5 @@
 <script lang="ts">
 	import SearchBar from '../SearchBar.svelte';
-	import ThemeToggle from '../ThemeToggle.svelte';
 	import SyncIndicator from '../SyncIndicator.svelte';
 
 	interface Props {
@@ -10,20 +9,20 @@
 	let { onMenuToggle }: Props = $props();
 </script>
 
-<header class="sticky top-0 z-30 flex h-16 items-center gap-4 border-b border-gray-200 bg-white px-4 shadow-sm dark:border-gray-700 dark:bg-gray-900">
+<header class="sticky top-0 z-30 flex h-16 items-center gap-4 border-b border-gray-200 bg-white px-4 shadow-sm">
 	<button
 		onclick={onMenuToggle}
-		class="rounded-full p-2 hover:bg-gray-100 dark:hover:bg-gray-800"
+		class="rounded-full p-2 hover:bg-gray-100"
 		aria-label="Toggle sidebar"
 	>
-		<svg class="h-6 w-6 text-gray-600 dark:text-gray-300" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+		<svg class="h-6 w-6 text-gray-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
 			<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M4 6h16M4 12h16M4 18h16" />
 		</svg>
 	</button>
 
 	<div class="flex items-center gap-2">
 		<span class="text-2xl">🥨</span>
-		<h1 class="text-xl font-semibold text-gray-800 dark:text-gray-100">Crumbs</h1>
+		<h1 class="text-xl font-semibold text-gray-800">Crumbs</h1>
 	</div>
 
 	<div class="mx-4 flex-1">
@@ -32,6 +31,5 @@
 
 	<div class="flex items-center gap-2">
 		<SyncIndicator />
-		<ThemeToggle />
 	</div>
 </header>

src/lib/components/Layout/Sidebar.svelte

@@ -20,14 +20,14 @@
 </script>
 
 <aside
-	class="fixed left-0 top-16 z-20 h-[calc(100vh-4rem)] w-64 transform border-r border-gray-200 bg-white transition-transform duration-200 dark:border-gray-700 dark:bg-gray-900 {open ? 'translate-x-0' : '-translate-x-full'} lg:translate-x-0"
+	class="fixed left-0 top-16 z-20 h-[calc(100vh-4rem)] w-64 transform border-r border-gray-200 bg-white transition-transform duration-200 {open ? 'translate-x-0' : '-translate-x-full'} lg:translate-x-0"
 >
 	<nav class="p-2">
 		<ul class="space-y-1">
 			<li>
 				<button
 					onclick={() => setFilter('all')}
-					class="flex w-full items-center gap-3 rounded-full px-6 py-3 text-left text-sm transition-colors {$currentFilter === 'all' && !$selectedTag ? 'bg-amber-100 text-amber-900 dark:bg-amber-900/30 dark:text-amber-200' : 'text-gray-700 hover:bg-gray-100 dark:text-gray-300 dark:hover:bg-gray-800'}"
+					class="flex w-full items-center gap-3 rounded-full px-6 py-3 text-left text-sm transition-colors {$currentFilter === 'all' && !$selectedTag ? 'bg-amber-100 text-amber-900' : 'text-gray-700 hover:bg-gray-100'}"
 				>
 					<svg class="h-5 w-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
 						<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9.663 17h4.673M12 3v1m6.364 1.636l-.707.707M21 12h-1M4 12H3m3.343-5.657l-.707-.707m2.828 9.9a5 5 0 117.072 0l-.548.547A3.374 3.374 0 0014 18.469V19a2 2 0 11-4 0v-.531c0-.895-.356-1.754-.988-2.386l-.548-.547z" />
@@ -38,7 +38,7 @@
 			<li>
 				<button
 					onclick={() => setFilter('archived')}
-					class="flex w-full items-center gap-3 rounded-full px-6 py-3 text-left text-sm transition-colors {$currentFilter === 'archived' ? 'bg-amber-100 text-amber-900 dark:bg-amber-900/30 dark:text-amber-200' : 'text-gray-700 hover:bg-gray-100 dark:text-gray-300 dark:hover:bg-gray-800'}"
+					class="flex w-full items-center gap-3 rounded-full px-6 py-3 text-left text-sm transition-colors {$currentFilter === 'archived' ? 'bg-amber-100 text-amber-900' : 'text-gray-700 hover:bg-gray-100'}"
 				>
 					<svg class="h-5 w-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
 						<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M5 8h14M5 8a2 2 0 110-4h14a2 2 0 110 4M5 8v10a2 2 0 002 2h10a2 2 0 002-2V8m-9 4h4" />
@@ -49,7 +49,7 @@
 			<li>
 				<button
 					onclick={() => setFilter('trashed')}
-					class="flex w-full items-center gap-3 rounded-full px-6 py-3 text-left text-sm transition-colors {$currentFilter === 'trashed' ? 'bg-amber-100 text-amber-900 dark:bg-amber-900/30 dark:text-amber-200' : 'text-gray-700 hover:bg-gray-100 dark:text-gray-300 dark:hover:bg-gray-800'}"
+					class="flex w-full items-center gap-3 rounded-full px-6 py-3 text-left text-sm transition-colors {$currentFilter === 'trashed' ? 'bg-amber-100 text-amber-900' : 'text-gray-700 hover:bg-gray-100'}"
 				>
 					<svg class="h-5 w-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
 						<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M19 7l-.867 12.142A2 2 0 0116.138 21H7.862a2 2 0 01-1.995-1.858L5 7m5 4v6m4-6v6m1-10V4a1 1 0 00-1-1h-4a1 1 0 00-1 1v3M4 7h16" />
@@ -60,14 +60,14 @@
 		</ul>
 
 		{#if $allTags.length > 0}
-			<div class="mt-6 border-t border-gray-200 pt-4 dark:border-gray-700">
-				<h3 class="px-6 text-xs font-semibold uppercase tracking-wider text-gray-500 dark:text-gray-400">Tags</h3>
+			<div class="mt-6 border-t border-gray-200 pt-4">
+				<h3 class="px-6 text-xs font-semibold uppercase tracking-wider text-gray-500">Tags</h3>
 				<ul class="mt-2 space-y-1">
 					{#each $allTags as tag}
 						<li>
 							<button
 								onclick={() => selectTag($selectedTag === tag ? null : tag)}
-								class="flex w-full items-center gap-3 rounded-full px-6 py-2 text-left text-sm transition-colors {$selectedTag === tag ? 'bg-amber-100 text-amber-900 dark:bg-amber-900/30 dark:text-amber-200' : 'text-gray-700 hover:bg-gray-100 dark:text-gray-300 dark:hover:bg-gray-800'}"
+								class="flex w-full items-center gap-3 rounded-full px-6 py-2 text-left text-sm transition-colors {$selectedTag === tag ? 'bg-amber-100 text-amber-900' : 'text-gray-700 hover:bg-gray-100'}"
 							>
 								<svg class="h-4 w-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
 									<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M7 7h.01M7 3h5c.512 0 1.024.195 1.414.586l7 7a2 2 0 010 2.828l-7 7a2 2 0 01-2.828 0l-7-7A1.994 1.994 0 013 12V7a4 4 0 014-4z" />

src/lib/components/Layout/Toast.svelte

@@ -32,7 +32,7 @@
 <div class="fixed bottom-4 left-1/2 z-50 flex -translate-x-1/2 flex-col gap-2">
 	{#each $toasts as toast (toast.id)}
 		<div
-			class="flex items-center gap-3 rounded-lg px-4 py-3 shadow-lg {toast.type === 'error' ? 'bg-red-600 text-white' : toast.type === 'success' ? 'bg-green-600 text-white' : 'bg-gray-800 text-white dark:bg-gray-200 dark:text-gray-900'}"
+			class="flex items-center gap-3 rounded-lg px-4 py-3 shadow-lg {toast.type === 'error' ? 'bg-red-600 text-white' : toast.type === 'success' ? 'bg-green-600 text-white' : 'bg-gray-800 text-white'}"
 		>
 			<span class="text-sm">{toast.text}</span>
 			{#if toast.action}

src/lib/components/NoteCard.svelte

@@ -1,6 +1,5 @@
 <script lang="ts">
 	import { NOTE_COLORS } from '$lib/utils/colors.js';
-	import { effectiveTheme } from '$lib/stores/theme.js';
 	import { renderMarkdown } from '$lib/utils/markdown.js';
 	import { togglePin, trashNote, archiveNote, unarchiveNote, restoreNote, deleteNote, currentFilter } from '$lib/stores/notes.js';
 	import type { Note } from '$lib/types/index.js';
@@ -19,8 +18,7 @@
 
 	$effect(() => {
 		const colors = NOTE_COLORS[note.color];
-		const bg = $effectiveTheme === 'dark' ? colors.dark : colors.light;
-		cardStyle = `background-color: ${bg}`;
+		cardStyle = `background-color: ${colors.bg}`;
 	});
 
 	let cardStyle = $state('');
@@ -45,7 +43,7 @@
 </script>
 
 <article
-	class="group relative cursor-pointer rounded-lg border border-gray-200 p-4 shadow-sm transition-shadow hover:shadow-md dark:border-gray-700"
+	class="group relative cursor-pointer rounded-lg border border-gray-200 p-4 shadow-sm transition-shadow hover:shadow-md"
 	style={cardStyle}
 	onclick={() => onEdit(note)}
 	onkeydown={(e) => e.key === 'Enter' && onEdit(note)}
@@ -55,13 +53,13 @@
 	data-note-id={note.id}
 >
 	{#if note.title}
-		<h3 class="mb-2 text-sm font-semibold text-gray-900 dark:text-gray-100">{note.title}</h3>
+		<h3 class="mb-2 text-sm font-semibold text-gray-900">{note.title}</h3>
 	{/if}
 
 	{#if note.checklistMode && checklistItems.length > 0}
 		<ul class="space-y-1" data-testid="note-checklist-preview">
 			{#each checklistItems.slice(0, 8) as item}
-				<li class="flex items-center gap-2 text-sm {item.checked ? 'text-gray-400 line-through' : 'text-gray-700 dark:text-gray-300'}">
+				<li class="flex items-center gap-2 text-sm {item.checked ? 'text-gray-400 line-through' : 'text-gray-700'}">
 					<input type="checkbox" checked={item.checked} disabled class="h-3.5 w-3.5 rounded border-gray-300 text-amber-600" />
 					<span class="truncate">{item.text}</span>
 				</li>
@@ -71,7 +69,7 @@
 			{/if}
 		</ul>
 	{:else if note.content}
-		<div class="prose prose-sm dark:prose-invert line-clamp-6 max-w-none text-sm text-gray-700 dark:text-gray-300" data-testid="note-content-preview">
+		<div class="prose prose-sm line-clamp-6 max-w-none text-sm text-gray-700" data-testid="note-content-preview">
 			{@html renderedContent}
 		</div>
 	{/if}
@@ -79,7 +77,7 @@
 	{#if note.tags && note.tags.length > 0}
 		<div class="mt-2 flex flex-wrap gap-1">
 			{#each note.tags as tag}
-				<span class="rounded-full bg-gray-200/60 px-2 py-0.5 text-xs text-gray-600 dark:bg-gray-700/60 dark:text-gray-400">
+				<span class="rounded-full bg-gray-200/60 px-2 py-0.5 text-xs text-gray-600">
 					#{tag}
 				</span>
 			{/each}
@@ -91,7 +89,7 @@
 		{#if $currentFilter === 'trashed'}
 			<button
 				onclick={stop(() => restoreNote(note.id))}
-				class="rounded-full p-1.5 hover:bg-black/10 dark:hover:bg-white/10"
+				class="rounded-full p-1.5 hover:bg-black/10"
 				title="Restore"
 				data-testid="restore-btn"
 			>
@@ -101,7 +99,7 @@
 			</button>
 			<button
 				onclick={stop(() => deleteNote(note.id))}
-				class="rounded-full p-1.5 hover:bg-black/10 dark:hover:bg-white/10"
+				class="rounded-full p-1.5 hover:bg-black/10"
 				title="Delete forever"
 				data-testid="delete-forever-btn"
 			>
@@ -112,7 +110,7 @@
 		{:else}
 			<button
 				onclick={stop(() => togglePin(note.id, note.pinned))}
-				class="rounded-full p-1.5 hover:bg-black/10 dark:hover:bg-white/10"
+				class="rounded-full p-1.5 hover:bg-black/10"
 				title={note.pinned ? 'Unpin' : 'Pin'}
 				data-testid="pin-btn"
 			>
@@ -123,7 +121,7 @@
 			{#if $currentFilter === 'archived'}
 				<button
 					onclick={stop(() => unarchiveNote(note.id))}
-					class="rounded-full p-1.5 hover:bg-black/10 dark:hover:bg-white/10"
+					class="rounded-full p-1.5 hover:bg-black/10"
 					title="Unarchive"
 					data-testid="unarchive-btn"
 				>
@@ -134,7 +132,7 @@
 			{:else}
 				<button
 					onclick={stop(() => archiveNote(note.id))}
-					class="rounded-full p-1.5 hover:bg-black/10 dark:hover:bg-white/10"
+					class="rounded-full p-1.5 hover:bg-black/10"
 					title="Archive"
 					data-testid="archive-btn"
 				>
@@ -145,7 +143,7 @@
 			{/if}
 			<button
 				onclick={stop(() => trashNote(note.id))}
-				class="rounded-full p-1.5 hover:bg-black/10 dark:hover:bg-white/10"
+				class="rounded-full p-1.5 hover:bg-black/10"
 				title="Delete"
 				data-testid="trash-btn"
 			>

src/lib/components/NoteEditor.svelte

@@ -5,7 +5,6 @@
 	import TiptapEditor from './TiptapEditor.svelte';
 	import { updateNote, createNote } from '$lib/stores/notes.js';
 	import { NOTE_COLORS } from '$lib/utils/colors.js';
-	import { effectiveTheme } from '$lib/stores/theme.js';
 	import type { Editor } from '@tiptap/core';
 	import type { Note, NoteColor } from '$lib/types/index.js';
 
@@ -34,7 +33,7 @@
 	let bgStyle = $state('');
 	$effect(() => {
 		const colors = NOTE_COLORS[color];
-		bgStyle = `background-color: ${$effectiveTheme === 'dark' ? colors.dark : colors.light}`;
+		bgStyle = `background-color: ${colors.bg}`;
 	});
 
 	async function save() {
@@ -79,7 +78,7 @@
 >
 	<!-- svelte-ignore a11y_no_static_element_interactions -->
 	<div
-		class="mx-4 w-full max-w-xl rounded-lg border border-gray-200 shadow-xl dark:border-gray-700"
+		class="mx-4 w-full max-w-xl rounded-lg border border-gray-200 shadow-xl"
 		style={bgStyle}
 		onclick={(e) => e.stopPropagation()}
 		onkeydown={(e) => { e.stopPropagation(); handleKeydown(e); }}
@@ -90,7 +89,7 @@
 			type="text"
 			placeholder="Title"
 			bind:value={title}
-			class="w-full bg-transparent px-4 pt-4 text-lg font-semibold text-gray-900 outline-none placeholder:text-gray-500 dark:text-gray-100"
+			class="w-full bg-transparent px-4 pt-4 text-lg font-semibold text-gray-900 outline-none placeholder:text-gray-500"
 			data-testid="note-title-input"
 		/>
 
@@ -104,7 +103,7 @@
 				bind:this={textareaEl}
 				placeholder="Take a note..."
 				bind:value={content}
-				class="min-h-[300px] w-full resize-none bg-transparent px-4 py-2 text-sm text-gray-800 outline-none placeholder:text-gray-500 dark:text-gray-200"
+				class="min-h-[300px] w-full resize-none bg-transparent px-4 py-2 text-sm text-gray-800 outline-none placeholder:text-gray-500"
 				rows="12"
 				data-testid="note-content-input"
 			></textarea>
@@ -124,22 +123,22 @@
 		{/if}
 
 		<!-- Toolbar -->
-		<div class="flex items-center justify-between border-t border-gray-200/50 px-2 py-2 dark:border-gray-700/50">
+		<div class="flex items-center justify-between border-t border-gray-200/50 px-2 py-2">
 			<div class="flex items-center gap-1">
 				<!-- Color picker toggle -->
 				<div class="relative">
 					<button
 						onclick={() => (showColorPicker = !showColorPicker)}
-						class="rounded-full p-2 hover:bg-black/10 dark:hover:bg-white/10"
+						class="rounded-full p-2 hover:bg-black/10"
 						title="Background color"
 						data-testid="color-picker-toggle"
 					>
-						<svg class="h-5 w-5 text-gray-600 dark:text-gray-400" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+						<svg class="h-5 w-5 text-gray-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
 							<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M7 21a4 4 0 01-4-4V5a2 2 0 012-2h4a2 2 0 012 2v12a4 4 0 01-4 4zm0 0h12a2 2 0 002-2v-4a2 2 0 00-2-2h-2.343M11 7.343l1.657-1.657a2 2 0 012.828 0l2.829 2.829a2 2 0 010 2.828l-8.486 8.485M7 17h.01" />
 						</svg>
 					</button>
 					{#if showColorPicker}
-						<div class="absolute left-0 top-full mt-2 rounded-lg border border-gray-200 bg-white p-2 shadow-lg dark:border-gray-700 dark:bg-gray-800">
+						<div class="absolute left-0 top-full mt-2 rounded-lg border border-gray-200 bg-white p-2 shadow-lg">
 							<ColorPicker selected={color} onSelect={handleColorSelect} />
 						</div>
 					{/if}
@@ -148,7 +147,7 @@
 				<!-- Checklist mode toggle -->
 				<button
 					onclick={() => (checklistMode = !checklistMode)}
-					class="rounded-full p-2 hover:bg-black/10 dark:hover:bg-white/10 {checklistMode ? 'text-amber-600' : ''}"
+					class="rounded-full p-2 hover:bg-black/10 {checklistMode ? 'text-amber-600' : ''}"
 					title="Checklist mode"
 					data-testid="checklist-toggle"
 				>
@@ -160,7 +159,7 @@
 				<!-- Raw markdown mode toggle -->
 				<button
 					onclick={toggleMarkdownMode}
-					class="rounded-full p-2 hover:bg-black/10 dark:hover:bg-white/10 {rawMarkdownMode ? 'text-amber-600' : ''}"
+					class="rounded-full p-2 hover:bg-black/10 {rawMarkdownMode ? 'text-amber-600' : ''}"
 					title="Markdown mode"
 					data-testid="markdown-toggle"
 				>
@@ -172,7 +171,7 @@
 
 			<button
 				onclick={save}
-				class="rounded px-4 py-1 text-sm font-medium text-gray-700 hover:bg-black/10 dark:text-gray-300 dark:hover:bg-white/10"
+				class="rounded px-4 py-1 text-sm font-medium text-gray-700 hover:bg-black/10"
 				data-testid="close-editor-btn"
 			>
 				Close

src/lib/components/NoteGrid.svelte

@@ -13,7 +13,7 @@
 
 {#if notes.length > 0}
 	{#if label}
-		<p class="mb-2 px-2 text-xs font-semibold uppercase tracking-wider text-gray-500 dark:text-gray-400">{label}</p>
+		<p class="mb-2 px-2 text-xs font-semibold uppercase tracking-wider text-gray-500">{label}</p>
 	{/if}
 	<div class="grid grid-cols-1 gap-4 sm:grid-cols-2 md:grid-cols-3 lg:grid-cols-4" data-testid="note-grid">
 		{#each notes as note (note.id)}

src/lib/components/SearchBar.svelte

@@ -37,7 +37,7 @@
 </script>
 
 <div class="relative max-w-2xl">
-	<div class="flex items-center rounded-lg bg-gray-100 px-4 py-2 dark:bg-gray-800">
+	<div class="flex items-center rounded-lg bg-gray-100 px-4 py-2">
 		<svg class="mr-3 h-5 w-5 text-gray-500" fill="none" stroke="currentColor" viewBox="0 0 24 24">
 			<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M21 21l-6-6m2-5a7 7 0 11-14 0 7 7 0 0114 0z" />
 		</svg>
@@ -46,11 +46,11 @@
 			placeholder="Search notes..."
 			bind:value={query}
 			oninput={handleSearch}
-			class="w-full bg-transparent text-sm text-gray-800 outline-none placeholder:text-gray-500 dark:text-gray-200"
+			class="w-full bg-transparent text-sm text-gray-800 outline-none placeholder:text-gray-500"
 			data-testid="search-input"
 		/>
 		{#if query}
-			<button onclick={clearSearch} class="ml-2 text-gray-500 hover:text-gray-700 dark:hover:text-gray-300" aria-label="Clear search">
+			<button onclick={clearSearch} class="ml-2 text-gray-500 hover:text-gray-700" aria-label="Clear search">
 				<svg class="h-5 w-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
 					<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M6 18L18 6M6 6l12 12" />
 				</svg>

src/lib/components/TagFilter.svelte

@@ -11,7 +11,7 @@
 		{#each $allTags as tag}
 			<button
 				onclick={() => toggleTag(tag)}
-				class="rounded-full px-3 py-1 text-xs font-medium transition-colors {$selectedTag === tag ? 'bg-amber-200 text-amber-900 dark:bg-amber-800 dark:text-amber-100' : 'bg-gray-100 text-gray-600 hover:bg-gray-200 dark:bg-gray-800 dark:text-gray-400 dark:hover:bg-gray-700'}"
+				class="rounded-full px-3 py-1 text-xs font-medium transition-colors {$selectedTag === tag ? 'bg-amber-200 text-amber-900' : 'bg-gray-100 text-gray-600 hover:bg-gray-200'}"
 				data-testid="tag-chip"
 			>
 				#{tag}

src/lib/components/ThemeToggle.svelte

@@ -1,20 +0,0 @@
-<script lang="ts">
-	import { effectiveTheme, toggleTheme } from '$lib/stores/theme.js';
-</script>
-
-<button
-	onclick={toggleTheme}
-	class="rounded-full p-2 hover:bg-gray-100 dark:hover:bg-gray-800"
-	aria-label="Toggle dark mode"
-	data-testid="theme-toggle"
->
-	{#if $effectiveTheme === 'dark'}
-		<svg class="h-5 w-5 text-gray-300" fill="currentColor" viewBox="0 0 24 24">
-			<path d="M12 3v1m0 16v1m9-9h-1M4 12H3m15.364 6.364l-.707-.707M6.343 6.343l-.707-.707m12.728 0l-.707.707M6.343 17.657l-.707.707M16 12a4 4 0 11-8 0 4 4 0 018 0z" />
-		</svg>
-	{:else}
-		<svg class="h-5 w-5 text-gray-600" fill="currentColor" viewBox="0 0 24 24">
-			<path d="M20.354 15.354A9 9 0 018.646 3.646 9.003 9.003 0 0012 21a9.003 9.003 0 008.354-5.646z" />
-		</svg>
-	{/if}
-</button>

src/lib/components/TiptapEditor.svelte

@@ -58,7 +58,7 @@
 
 <div
 	bind:this={element}
-	class="tiptap-wrapper prose prose-sm dark:prose-invert min-h-[300px] max-w-none px-4 py-2 text-gray-800 dark:text-gray-200"
+	class="tiptap-wrapper prose prose-sm min-h-[300px] max-w-none px-4 py-2 text-gray-800"
 	data-testid="tiptap-editor"
 ></div>