diff --git a/src/app.css b/src/app.css
index 1da4f67..1909965 100644
--- a/src/app.css
+++ b/src/app.css
@@ -2,6 +2,12 @@
 
 @custom-variant dark (&:where(.dark, .dark *));
 
+@theme {
+	--radius: 2px;
+	--radius-lg: 4px;
+	--radius-full: 9999px;
+}
+
 :root {
 	--bg: #fafafa;
 	--bg-card: #ffffff;
diff --git a/src/lib/components/Header.svelte b/src/lib/components/Header.svelte
index 75b1288..aeb040d 100644
--- a/src/lib/components/Header.svelte
+++ b/src/lib/components/Header.svelte
@@ -1,5 +1,5 @@
 <script lang="ts">
-	import { Sun, Moon, Share2, Check, Trash2 } from 'lucide-svelte';
+	import { Sun, Moon, Share2, Check, Trash2, Plus } from 'lucide-svelte';
 	import { theme } from '$lib/theme.svelte';
 	import { roster } from '$lib/state.svelte';
 	import { presets } from '$lib/presets';
@@ -40,23 +40,30 @@
 	}
 </script>
 
-<header class="flex items-center gap-2 px-4 py-3 border-b shrink-0" style="border-color: var(--border); background: var(--bg-card);">
+<header class="border-b shrink-0" style="border-color: var(--border); background: var(--bg-card);">
+<div class="flex items-center gap-2 px-4 py-3 max-w-7xl mx-auto w-full">
 	<h1 class="font-bold whitespace-nowrap">Aurora Records</h1>
 
 	{#if roster.characters.length > 0}
 		<CharacterSwitcher />
+	{/if}
 
-		<button onclick={share} class="flex items-center justify-center w-[30px] h-[30px] rounded border hover:opacity-80" style="border-color: var(--border);" title="Share character">
+	<button onclick={createCharacter} class="flex items-center justify-center w-[30px] h-[30px] rounded border hover:opacity-80" style="border-color: var(--border);" title="New character">
+		<Plus size={14} />
+	</button>
+
+	{#if roster.characters.length > 0}
+		<button onclick={() => { confirmDelete = true; }} class="flex items-center justify-center w-[30px] h-[30px] rounded border hover:opacity-80" style="border-color: var(--border);" title="Delete character">
+			<Trash2 size={14} />
+		</button>
+
+		<button onclick={share} class="flex items-center justify-center h-[30px] rounded border hover:opacity-80 {shared ? 'gap-1 px-2' : 'w-[30px]'}" style="border-color: var(--border);" title="Share character">
 			{#if shared}
-				<Check size={14} />
+				<Check size={14} /> <span class="text-sm hidden sm:inline">Copied share link</span>
 			{:else}
 				<Share2 size={14} />
 			{/if}
 		</button>
-
-		<button onclick={() => { confirmDelete = true; }} class="flex items-center justify-center w-[30px] h-[30px] rounded border hover:opacity-80" style="border-color: var(--border);" title="Delete character">
-			<Trash2 size={14} />
-		</button>
 	{/if}
 
 	<div class="ml-auto flex items-center gap-2">
@@ -64,14 +71,6 @@
 			{#if roster.saveStatus === 'saving'}Saving...{:else if roster.saveStatus === 'saved'}Saved{/if}
 		</span>
 
-		<button
-			onclick={createCharacter}
-			class="px-3 h-[30px] rounded text-sm border hover:opacity-80"
-			style="border-color: var(--border);"
-		>
-			New Character
-		</button>
-
 		<button onclick={() => theme.toggle()} class="flex items-center justify-center w-[30px] h-[30px] rounded hover:opacity-80" title="Toggle theme">
 			{#if theme.dark}
 				<Sun size={18} />
@@ -80,6 +79,7 @@
 			{/if}
 		</button>
 	</div>
+</div>
 </header>
 
 {#if confirmDelete && roster.active}
diff --git a/src/routes/+page.svelte b/src/routes/+page.svelte
index cc1051a..7d4f34e 100644
--- a/src/routes/+page.svelte
+++ b/src/routes/+page.svelte
@@ -1,6 +1,5 @@
 <script lang="ts">
 	import { onMount } from 'svelte';
-	import { Eye, PenLine } from 'lucide-svelte';
 	import Header from '$lib/components/Header.svelte';
 	import SchemaForm from '$lib/components/SchemaForm.svelte';
 	import OutputPanel from '$lib/components/OutputPanel.svelte';
@@ -9,7 +8,7 @@
 	import { presets } from '$lib/presets';
 
 	let importData = $state<string | null>(null);
-	let mobileView = $state<'form' | 'preview'>('form');
+	let mobileView = $state<'edit' | 'preview' | 'split'>('split');
 
 	onMount(() => {
 		const hash = window.location.hash.slice(1);
@@ -22,6 +21,8 @@
 		importData = null;
 		history.replaceState(null, '', window.location.pathname);
 	}
+
+	const modes = ['edit', 'preview', 'split'] as const;
 </script>
 
 <div class="h-dvh flex flex-col overflow-hidden">
@@ -33,29 +34,53 @@
 		</div>
 	{:else if roster.active}
 		{@const char = roster.active}
-		<main class="flex-1 grid grid-cols-1 lg:grid-cols-[1fr_1fr] overflow-hidden relative">
-			<div class="overflow-y-auto p-4 {mobileView === 'preview' ? 'hidden lg:block' : ''}">
-				<div class="max-w-xl mx-auto">
-					<SchemaForm character={char} />
-				</div>
+
+		<div class="flex items-center justify-center gap-0 py-1 shrink-0 border-b md:hidden" style="border-color: var(--border); background: var(--bg-card);">
+			{#each modes as mode}
+				<button
+					onclick={() => { mobileView = mode; }}
+					class="px-3 py-0.5 text-sm capitalize"
+					style={mobileView === mode
+						? 'color: var(--text); font-weight: 500;'
+						: 'color: var(--text-muted);'}
+				>
+					{mode}
+				</button>
+			{/each}
+		</div>
+
+		<!-- Desktop: always side-by-side -->
+		<main class="flex-1 hidden md:grid md:grid-cols-[1fr_1fr] overflow-hidden max-w-7xl mx-auto w-full">
+			<div class="overflow-y-auto p-4">
+				<SchemaForm character={char} />
 			</div>
-			<div class="p-4 min-h-0 flex flex-col {mobileView === 'form' ? 'hidden lg:flex' : ''}">
+			<div class="p-4 min-h-0 flex flex-col">
 				<OutputPanel character={char} />
 			</div>
+		</main>
 
-			<div class="fixed bottom-4 right-4 lg:hidden z-10">
-				<button
-					onclick={() => { mobileView = mobileView === 'form' ? 'preview' : 'form'; }}
-					class="flex items-center gap-2 px-3 py-2 rounded-full shadow-lg text-sm"
-					style="background: var(--bg-card); border: 1px solid var(--border); color: var(--text);"
-				>
-					{#if mobileView === 'form'}
-						<Eye size={16} /> Preview
-					{:else}
-						<PenLine size={16} /> Edit
-					{/if}
-				</button>
-			</div>
+		<!-- Mobile: view mode toggle -->
+		<main class="flex-1 flex flex-col overflow-hidden md:hidden">
+			{#if mobileView === 'edit'}
+				<div class="flex-1 overflow-y-auto p-4">
+					<div class="md:max-w-xl md:mx-auto">
+						<SchemaForm character={char} />
+					</div>
+				</div>
+			{:else if mobileView === 'preview'}
+				<div class="flex-1 p-4 min-h-0 flex flex-col">
+					<OutputPanel character={char} />
+				</div>
+			{:else}
+				<div class="flex-1 overflow-y-auto p-4">
+					<div class="md:max-w-xl md:mx-auto">
+						<SchemaForm character={char} />
+					</div>
+				</div>
+				<div class="h-[50%] shrink-0 p-4 min-h-0 flex flex-col border-t" style="border-color: var(--border);">
+					<OutputPanel character={char} />
+				</div>
+			{/if}
 		</main>
 	{:else}
 		<main class="flex-1 flex flex-col items-center justify-center gap-4">