diff --git a/frontend/src/routes/studio/[id]/+page.svelte b/frontend/src/routes/studio/[id]/+page.svelte
index 6ddf832..8b111c4 100644
--- a/frontend/src/routes/studio/[id]/+page.svelte
+++ b/frontend/src/routes/studio/[id]/+page.svelte
@@ -46,6 +46,9 @@
 	let renderJobId: string | null = $state(null);
 	let resultNodeId: string | null = $state(null);
 
+	// Mobile tool panel sheet
+	let showToolSheet = $state(false);
+
 	// Session persistence
 	let sessionNodeId: string | null = $state(null);
 	let saving = $state(false);
@@ -287,18 +290,18 @@
 
 <div class="flex min-h-screen flex-col bg-gray-50">
 	<!-- Header -->
-	<header class="flex items-center justify-between border-b border-gray-200 bg-white px-4 py-3">
-		<div class="flex items-center gap-3">
-			<a href="/" class="text-gray-400 hover:text-gray-600">
+	<header class="flex items-center justify-between border-b border-gray-200 bg-white px-3 py-2 sm:px-4 sm:py-3">
+		<div class="flex min-w-0 items-center gap-2 sm:gap-3">
+			<a href="/" class="shrink-0 text-gray-400 hover:text-gray-600">
 				<svg class="h-5 w-5" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="2">
 					<path stroke-linecap="round" stroke-linejoin="round" d="M10 19l-7-7m0 0l7-7m-7 7h18" />
 				</svg>
 			</a>
-			<h1 class="text-lg font-semibold text-gray-800">
+			<h1 class="truncate text-base font-semibold text-gray-800 sm:text-lg">
 				{mediaNode?.title ?? 'Lydstudio'}
 			</h1>
 			{#if audioInfo}
-				<span class="rounded bg-gray-100 px-2 py-0.5 text-xs text-gray-500">
+				<span class="hidden rounded bg-gray-100 px-2 py-0.5 text-xs text-gray-500 sm:inline">
 					{audioInfo.codec} / {audioInfo.sample_rate}Hz / {audioInfo.channels}ch
 				</span>
 			{/if}
@@ -329,9 +332,9 @@
 			</p>
 		</div>
 	{:else}
-		<div class="flex flex-1 gap-4 p-4">
+		<div class="flex flex-1 flex-col gap-4 p-4 lg:flex-row">
 			<!-- Main area: waveform + transcription -->
-			<div class="flex flex-1 flex-col gap-4">
+			<div class="flex flex-1 flex-col gap-4 min-w-0">
 				<StudioWaveform
 					bind:this={waveformRef}
 					src={audioSrc}
@@ -362,8 +365,8 @@
 				{/if}
 			</div>
 
-			<!-- Sidebar: operation panel -->
-			<div class="flex w-72 shrink-0 flex-col gap-4 overflow-y-auto lg:w-80">
+			<!-- Sidebar: operation panel (desktop) -->
+			<div class="hidden w-72 shrink-0 flex-col gap-4 overflow-y-auto lg:flex lg:w-80">
 				<OperationPanel
 					{loudness}
 					{silenceRegions}
@@ -401,6 +404,91 @@
 				{/if}
 			</div>
 		</div>
+
+		<!-- Mobile: floating tool button + bottom sheet -->
+		<div class="lg:hidden">
+			<!-- Floating action button -->
+			<button
+				onclick={() => { showToolSheet = !showToolSheet; }}
+				class="fixed bottom-4 right-4 z-40 flex h-14 w-14 items-center justify-center rounded-full bg-blue-600 text-white shadow-lg transition-transform hover:bg-blue-700 active:scale-95"
+				aria-label="Verktoy"
+			>
+				{#if showToolSheet}
+					<!-- Close icon -->
+					<svg class="h-6 w-6" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="2">
+						<path stroke-linecap="round" stroke-linejoin="round" d="M6 18L18 6M6 6l12 12" />
+					</svg>
+				{:else}
+					<!-- Settings/tool icon -->
+					<svg class="h-6 w-6" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="2">
+						<path stroke-linecap="round" stroke-linejoin="round" d="M10.325 4.317c.426-1.756 2.924-1.756 3.35 0a1.724 1.724 0 002.573 1.066c1.543-.94 3.31.826 2.37 2.37a1.724 1.724 0 001.066 2.573c1.756.426 1.756 2.924 0 3.35a1.724 1.724 0 00-1.066 2.573c.94 1.543-.826 3.31-2.37 2.37a1.724 1.724 0 00-2.573 1.066c-.426 1.756-2.924 1.756-3.35 0a1.724 1.724 0 00-2.573-1.066c-1.543.94-3.31-.826-2.37-2.37a1.724 1.724 0 00-1.066-2.573c-1.756-.426-1.756-2.924 0-3.35a1.724 1.724 0 001.066-2.573c-.94-1.543.826-3.31 2.37-2.37.996.608 2.296.07 2.572-1.065z" />
+						<path stroke-linecap="round" stroke-linejoin="round" d="M15 12a3 3 0 11-6 0 3 3 0 016 0z" />
+					</svg>
+				{/if}
+				{#if operations.length > 0 && !showToolSheet}
+					<span class="absolute -right-1 -top-1 flex h-5 w-5 items-center justify-center rounded-full bg-red-500 text-[10px] font-bold">
+						{operations.length}
+					</span>
+				{/if}
+			</button>
+
+			<!-- Bottom sheet backdrop -->
+			{#if showToolSheet}
+				<!-- svelte-ignore a11y_no_static_element_interactions -->
+				<div
+					class="fixed inset-0 z-40 bg-black/30"
+					onclick={() => { showToolSheet = false; }}
+					onkeydown={(e) => { if (e.key === 'Escape') showToolSheet = false; }}
+				></div>
+
+				<!-- Bottom sheet -->
+				<div class="fixed inset-x-0 bottom-0 z-50 flex max-h-[85vh] flex-col rounded-t-2xl bg-gray-50 shadow-2xl">
+					<!-- Handle -->
+					<div class="flex justify-center py-2">
+						<div class="h-1 w-10 rounded-full bg-gray-300"></div>
+					</div>
+
+					<!-- Sheet content -->
+					<div class="flex-1 overflow-y-auto px-4 pb-8">
+						<OperationPanel
+							{loudness}
+							{silenceRegions}
+							{audioInfo}
+							{analyzing}
+							{operations}
+							activeRegion={waveformRef?.getActiveRegion() ?? null}
+							onanalyze={handleAnalyze}
+							oncut={handleCut}
+							onaddop={handleAddOp}
+							onremoveop={handleRemoveOp}
+							onrender={handleRenderStart}
+							onundo={handleUndo}
+							ontrimsilence={handleTrimSilence}
+						/>
+
+						<!-- Version history -->
+						{#if versions.length > 0}
+							<div class="mt-4 rounded-lg border border-gray-200 bg-white p-4">
+								<h3 class="mb-2 text-sm font-semibold text-gray-700">Versjoner</h3>
+								<ul class="space-y-1">
+									<li class="flex items-center justify-between rounded bg-blue-50 px-2 py-1">
+										<span class="text-xs font-medium text-blue-700">Original</span>
+										<span class="text-[10px] text-blue-500">Navarende</span>
+									</li>
+									{#each versions as ver, i}
+										<li class="flex items-center justify-between rounded px-2 py-1 hover:bg-gray-50">
+											<a href="/studio/{ver.id}" class="text-xs text-gray-600 hover:text-blue-600">
+												v{i + 1}: {ver.title}
+											</a>
+										</li>
+									{/each}
+								</ul>
+							</div>
+						{/if}
+					</div>
+				</div>
+			{/if}
+		</div>
 	{/if}
 </div>
 
diff --git a/tasks.md b/tasks.md
index 51c1724..d2f5f67 100644
--- a/tasks.md
+++ b/tasks.md
@@ -189,8 +189,7 @@ Ref: `docs/features/lydmixer.md`
 
 Ref: Kodegjennomgang av `b4c4bb8` (Lydstudio: lydredigering via FFmpeg).
 
-- [~] 17.1 Responsivt studio-layout: `/studio/[id]` sidebar stacker under waveform på mobil. Verktøypanel som modal/sheet på små skjermer. Ref: feedback om at alt UI skal være responsivt uten unntak.
-  > Påbegynt: 2026-03-18T05:36
+- [x] 17.1 Responsivt studio-layout: `/studio/[id]` sidebar stacker under waveform på mobil. Verktøypanel som modal/sheet på små skjermer. Ref: feedback om at alt UI skal være responsivt uten unntak.
 - [ ] 17.2 FFmpeg-parametervalidering: valider at alle numeriske verdier (threshold, gain, ratio, frekvenser) er innenfor sikre grenser i `audio.rs` før de interpoleres i filterstrenger. Avvis ugyldige verdier med feilmelding.
 - [ ] 17.3 Fade/silence-logikk: fiks negativ fade-out start (clamp til 0), og adaptiv silence-margin (margin skal ikke overstige halve regionens varighet). Gi feilmelding ved ugyldige fade-varigheter.
 - [ ] 17.4 Frontend input-begrensninger: legg til `min`/`max` på alle tallfelter i OperationPanel (silenceThreshold, fadeMs, normTarget, compRatio). Hindre ugyldig input.