diff --git a/apps/tauri/src-tauri/capabilities/default.json b/apps/tauri/src-tauri/capabilities/default.json
index b21cc4f..7ec93f1 100644
--- a/apps/tauri/src-tauri/capabilities/default.json
+++ b/apps/tauri/src-tauri/capabilities/default.json
@@ -10,6 +10,7 @@
     "core:window:allow-minimize",
     "core:window:allow-toggle-maximize",
     "core:window:allow-start-dragging",
-    "core:window:allow-is-maximized"
+    "core:window:allow-is-maximized",
+    "core:window:allow-set-decorations"
   ]
 }
diff --git a/apps/tauri/src/App.svelte b/apps/tauri/src/App.svelte
index d9e8773..450bc1a 100644
--- a/apps/tauri/src/App.svelte
+++ b/apps/tauri/src/App.svelte
@@ -11,14 +11,18 @@
   onMount(() => {
     app.loadConfig();
   });
+
+  $effect(() => {
+    document.documentElement.classList.toggle("decorations-none", app.windowDecorations === "none");
+  });
 </script>
 
-<div class={app.isDark ? "dark" : ""} data-theme={app.currentTheme ?? ""}>
-  <div class="h-screen w-screen" class:p-2={isLinux} class:onyx-border={app.currentTheme === "onyx"}>
+<div class={app.isDark ? "dark" : ""} data-theme={app.currentTheme ?? ""} data-decorations={app.windowDecorations}>
+  <div class="h-screen w-screen" class:p-2={isLinux && app.windowDecorations === "custom"}>
     <div
       class="relative h-full w-full overflow-hidden bg-surface-light text-text-light dark:bg-surface-dark dark:text-text-dark"
-      class:rounded-xl={isLinux}
-      class:linux-window-border={isLinux}
+      class:rounded-xl={isLinux && app.windowDecorations === "custom"}
+      class:linux-window-border={isLinux && app.windowDecorations !== "system"}
       style="container-type: inline-size"
     >
       {#if app.error}
diff --git a/apps/tauri/src/app.css b/apps/tauri/src/app.css
index dc8b780..7da049f 100644
--- a/apps/tauri/src/app.css
+++ b/apps/tauri/src/app.css
@@ -195,10 +195,6 @@ body {
   border-color: rgba(209, 191, 130, 0.15);
 }
 
-/* Thick gold window border */
-[data-theme="onyx"] .onyx-border {
-  border: 3px solid #a6905a;
-}
 
 [data-theme="solarized"] {
   --color-primary: #268bd2;
@@ -216,6 +212,64 @@ body {
   --color-danger: #dc322f;
 }
 
+
+/* ── Ink (e-ink screen) theme ────────────────────────────────────── */
+
+[data-theme="ink"] {
+  --color-primary: #000000;
+  --color-primary-hover: #1a1a1a;
+  --color-surface-light: #ffffff;
+  --color-surface-dark: #ffffff;
+  --color-card-light: #f0f0f0;
+  --color-card-dark: #f0f0f0;
+  --color-text-light: #000000;
+  --color-text-dark: #000000;
+  --color-text-secondary-light: #444444;
+  --color-text-secondary-dark: #444444;
+  --color-border-light: #000000;
+  --color-border-dark: #000000;
+  --color-danger: #000000;
+}
+
+/* Suppress all shadows and decorative effects on ink screens */
+[data-theme="ink"] * {
+  box-shadow: none !important;
+  text-shadow: none !important;
+  scrollbar-color: #444444 transparent;
+}
+[data-theme="ink"] ::-webkit-scrollbar-thumb {
+  background: #444444;
+}
+[data-theme="ink"] select option {
+  background-color: #ffffff;
+  color: #000000;
+}
+[data-theme="ink"] .linux-window-border {
+  border-color: rgba(0, 0, 0, 0.5);
+}
+
+/* ── Dropdown/kebab menu shadow ──────────────────────────────────── */
+
+.menu-shadow {
+  box-shadow: 0 4px 10px 0 rgba(0, 0, 0, 0.12);
+}
+.dark .menu-shadow {
+  box-shadow: 0 4px 10px 0 rgba(0, 0, 0, 0.3);
+}
+
+/* ── Borderless mode: square corners on all popups/overlays ─────── */
+
+.decorations-none .rounded-sm,
+.decorations-none .rounded,
+.decorations-none .rounded-md,
+.decorations-none .rounded-lg,
+.decorations-none .rounded-xl,
+.decorations-none .rounded-2xl,
+.decorations-none .rounded-3xl,
+.decorations-none .dropdown-menu button {
+  border-radius: 0 !important;
+}
+
 /* ── Accessibility: Reduced motion ───────────────────────────────── */
 
 @media (prefers-reduced-motion: reduce) {
diff --git a/apps/tauri/src/lib/components/NewTaskInput.svelte b/apps/tauri/src/lib/components/NewTaskInput.svelte
index ede23cb..4da85e2 100644
--- a/apps/tauri/src/lib/components/NewTaskInput.svelte
+++ b/apps/tauri/src/lib/components/NewTaskInput.svelte
@@ -62,7 +62,7 @@
 <!-- Backdrop + sheet wrapper -->
 <!-- svelte-ignore a11y_no_static_element_interactions -->
 <div
-  class="fixed inset-0 z-50 flex flex-col justify-end transition-opacity duration-250 ease-out {newTaskState.open ? 'opacity-100 pointer-events-auto' : 'opacity-0 pointer-events-none'}"
+  class="absolute inset-0 z-50 flex flex-col justify-end overflow-hidden transition-opacity duration-250 ease-out {newTaskState.open ? 'opacity-100 pointer-events-auto' : 'opacity-0 pointer-events-none'}"
   style="background: rgba(0,0,0,0.4)"
   onclick={handleClose}
   onkeydown={(e) => { if (e.key === "Escape") handleClose(); }}
diff --git a/apps/tauri/src/lib/components/TaskDetailView.svelte b/apps/tauri/src/lib/components/TaskDetailView.svelte
index 88a3498..f1fc699 100644
--- a/apps/tauri/src/lib/components/TaskDetailView.svelte
+++ b/apps/tauri/src/lib/components/TaskDetailView.svelte
@@ -160,7 +160,7 @@
       </svg>
     </button>
     {#if showMenu}
-      <div class="absolute right-0 top-full z-40 mt-1 min-w-[200px] rounded-lg border border-border-light bg-surface-light py-1 shadow-lg dark:border-border-dark dark:bg-surface-dark">
+      <div class="dropdown-menu absolute right-0 top-full z-40 mt-1 min-w-[200px] rounded-lg border border-border-light bg-surface-light py-1 menu-shadow dark:border-border-dark dark:bg-surface-dark">
         <button
           onclick={handleToggle}
           class="flex w-full items-center gap-2 px-3 py-2 text-left text-sm hover:bg-black/5 dark:hover:bg-white/10"
@@ -278,7 +278,7 @@
               </svg>
             </button>
             {#if showSubtaskMenu}
-              <div class="absolute right-0 top-full z-40 mt-1 min-w-[240px] rounded-lg border border-border-light bg-surface-light py-1 shadow-lg dark:border-border-dark dark:bg-surface-dark">
+              <div class="dropdown-menu absolute right-0 top-full z-40 mt-1 min-w-[240px] rounded-lg border border-border-light bg-surface-light py-1 menu-shadow dark:border-border-dark dark:bg-surface-dark">
                 <button
                   onclick={() => { showSubtaskMenu = false; confirmDeleteCompleted = true; }}
                   class="flex w-full items-center gap-2 px-3 py-2 text-left text-sm text-danger hover:bg-black/5 dark:hover:bg-white/10"
diff --git a/apps/tauri/src/lib/screens/SettingsScreen.svelte b/apps/tauri/src/lib/screens/SettingsScreen.svelte
index 508c555..d63e617 100644
--- a/apps/tauri/src/lib/screens/SettingsScreen.svelte
+++ b/apps/tauri/src/lib/screens/SettingsScreen.svelte
@@ -1,8 +1,11 @@
 <script lang="ts">
   import { invoke } from "@tauri-apps/api/core";
+  import { platform } from "@tauri-apps/plugin-os";
   import { app } from "../stores/app.svelte";
   import ConfirmDialog from "../components/ConfirmDialog.svelte";
 
+  const isLinux = platform() === "linux";
+
   let { onclose, workspaceId, ondelete }: { onclose?: () => void; workspaceId: string; ondelete?: (id: string) => void } = $props();
 
   let ws = $derived(app.config?.workspaces[workspaceId]);
@@ -91,9 +94,10 @@
 <svelte:window onclick={handleWindowClick} />
 
 <header
+  data-tauri-drag-region
   class="flex items-center justify-between border-b border-border-light px-4 py-3 dark:border-border-dark"
 >
-  <h1 class="text-lg font-bold">Workspace Settings</h1>
+  <h1 class="text-lg font-bold" data-tauri-drag-region>Workspace Settings</h1>
   <button
     onclick={() => onclose?.()}
     class="rounded-lg p-1.5 hover:bg-black/5 dark:hover:bg-white/10"
@@ -132,7 +136,7 @@
       </svg>
     </button>
     {#if showKebab}
-      <div class="absolute right-0 top-full z-10 mt-1 w-40 rounded-xl border border-border-light bg-surface-light py-1 shadow-lg dark:border-border-dark dark:bg-surface-dark">
+      <div class="dropdown-menu absolute right-0 top-full z-10 mt-1 w-40 rounded-xl border border-border-light bg-surface-light py-1 menu-shadow dark:border-border-dark dark:bg-surface-dark">
         <button
           onclick={startRename}
           class="flex w-full items-center gap-2 px-4 py-2 text-sm hover:bg-black/5 dark:hover:bg-white/10"
@@ -260,9 +264,26 @@
       <option value="dracula">Dracula</option>
       <option value="solarized">Solarized Dark</option>
       <option value="onyx">Black and Gold</option>
+      <option value="ink">Ink</option>
     </select>
   </section>
 
+  {#if isLinux}
+    <!-- Window decorations (Linux only) -->
+    <section class="mt-6">
+      <label class="mb-1 block text-xs font-medium opacity-60">Window decorations</label>
+      <select
+        value={app.windowDecorations}
+        onchange={(e) => app.setWindowDecorations((e.target as HTMLSelectElement).value as "custom" | "none" | "system")}
+        class="w-full appearance-none rounded-lg border border-border-light bg-surface-light px-3 py-2 text-sm text-text-light outline-none focus:border-primary dark:border-border-dark dark:bg-surface-dark dark:text-text-dark"
+      >
+        <option value="custom">Custom border</option>
+        <option value="none">Borderless</option>
+        <option value="system">System title bar</option>
+      </select>
+    </section>
+  {/if}
+
   <p class="mt-8 text-center text-xs opacity-30">Tauri v2 + Svelte</p>
 </main>
 
diff --git a/apps/tauri/src/lib/screens/TasksScreen.svelte b/apps/tauri/src/lib/screens/TasksScreen.svelte
index b5457cb..0527799 100644
--- a/apps/tauri/src/lib/screens/TasksScreen.svelte
+++ b/apps/tauri/src/lib/screens/TasksScreen.svelte
@@ -290,7 +290,7 @@
         {#if showWorkspacePicker}
           <!-- svelte-ignore a11y_no_static_element_interactions -->
           <div
-            class="absolute left-0 top-full z-40 mt-1 w-full rounded-lg border border-border-light bg-surface-light py-1 shadow-lg dark:border-border-dark dark:bg-surface-dark"
+            class="dropdown-menu absolute left-0 top-full z-40 mt-1 w-full rounded-lg border border-border-light bg-surface-light py-1 menu-shadow dark:border-border-dark dark:bg-surface-dark"
           >
             {#each workspaceIds as wsId}
               {@const ws = app.config?.workspaces[wsId]}
@@ -500,7 +500,7 @@
                 </svg>
               </button>
               {#if showListMenu}
-                <div class="absolute right-0 top-full z-40 mt-1 min-w-[200px] rounded-lg border border-border-light bg-surface-light py-1 shadow-lg dark:border-border-dark dark:bg-surface-dark">
+                <div class="dropdown-menu absolute right-0 top-full z-40 mt-1 min-w-[200px] rounded-lg border border-border-light bg-surface-light py-1 menu-shadow dark:border-border-dark dark:bg-surface-dark">
                   <button
                     onclick={startRenameList}
                     class="flex w-full items-center gap-2 px-3 py-2 text-left text-sm hover:bg-black/5 dark:hover:bg-white/10"
diff --git a/apps/tauri/src/lib/stores/app.svelte.ts b/apps/tauri/src/lib/stores/app.svelte.ts
index 298c7d7..22179dc 100644
--- a/apps/tauri/src/lib/stores/app.svelte.ts
+++ b/apps/tauri/src/lib/stores/app.svelte.ts
@@ -18,6 +18,13 @@ listen("fs-changed", () => {
 
 // ── Reactive state ───────────────────────────────────────────────────
 
+const LS_DECORATIONS_KEY = "windowDecorations";
+let windowDecorations = $state<"custom" | "none" | "system">(
+  (localStorage.getItem(LS_DECORATIONS_KEY) as "custom" | "none" | "system") ?? "custom"
+);
+if (windowDecorations === "system") getCurrentWindow().setDecorations(true);
+if (windowDecorations === "none") document.documentElement.classList.add("decorations-none");
+
 let screen = $state<Screen>("setup");
 let config = $state<AppConfig | null>(null);
 let lists = $state<TaskList[]>([]);
@@ -429,6 +436,13 @@ async function setSyncIntervalUnfocused(secs: number | null) {
   }
 }
 
+function setWindowDecorations(value: "custom" | "none" | "system") {
+  windowDecorations = value;
+  localStorage.setItem(LS_DECORATIONS_KEY, value);
+  getCurrentWindow().setDecorations(value === "system");
+  document.documentElement.classList.toggle("decorations-none", value === "none");
+}
+
 async function setTheme(theme: string | null) {
   if (!config?.current_workspace) return;
   try {
@@ -549,6 +563,9 @@ export const app = {
   get lastSyncResult() {
     return lastSyncResult;
   },
+  get windowDecorations() {
+    return windowDecorations;
+  },
   get error() {
     return error;
   },
@@ -582,6 +599,7 @@ export const app = {
   stopAutoSync,
   setSyncInterval,
   setSyncIntervalUnfocused,
+  setWindowDecorations,
   setTheme,
   addWebdavWorkspace,
   forgetMissingWorkspace,