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+# UI Detail Polish Implementation Plan
+
+> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
+
+**Goal:** Apply the changes in `docs/superpowers/specs/2026-06-16-ui-detail-polish-design.md` — radius/spacing design tokens, subtle interaction feedback (hover/active/focus-visible), and a mobile workspace-toolbar wrapping fix.
+
+**Architecture:** This is a CSS-only change set, almost entirely confined to `src/style.css`, plus one selector update in `src/components/LoginPage.vue`'s `<style scoped>` block. There is no component markup or behavior change, and no new dependencies.
+
+**Tech Stack:** Vue 3 + TypeScript (Vite + Bun), plain CSS (no preprocessor, no CSS framework).
+
+## Global Constraints
+
+- No markup or `<script>` changes in any `.vue` file — CSS only.
+- Do not touch `src/print.css` or the A4 canvas layout (`.page`, `.a4-workspace`, `.a4-paper`).
+- Do not replace `window.confirm()` with the `.dialog` component anywhere (out of scope, separate future spec).
+- No new npm/bun dependencies, no icon or animation libraries.
+- This repo has no component test files (`bun run test` runs `vitest run` with zero test files — confirmed before writing this plan). The testable deliverable for each task is: `bun run build` passes (type-check via `vue-tsc -b` + Vite build) AND a manual visual check in the browser matches the description in that task.
+- Dev server: `bun run dev` (Vite on `http://localhost:5173/`). It was already running on port 5173 at the time this plan was written — check before starting a new one (`curl -s -o /dev/null -w "%{http_code}\n" http://localhost:5173/`).
+- Admin login credentials for manual checks (from `.env`): `admin` / `admin123`.
+- Make one commit per task, after its build+visual check passes.
+
+---
+
+### Task 1: Radius and spacing tokens
+
+**Files:**
+- Modify: `src/style.css:1-14` (`:root` block), and every line listed below in the same file.
+- Modify: `src/components/LoginPage.vue:76-86` (`.login-form` rule in `<style scoped>`)
+
+**Interfaces:**
+- Produces: CSS custom properties `--radius-sm`, `--radius-md`, `--radius-lg`, `--radius-xl`, `--radius-pill`, `--space-1`, `--space-2`, `--space-3`, `--space-4`, `--space-6` on `:root` in `src/style.css`. Every later task in this plan may reference these by name.
+
+- [ ] **Step 1: Add the token block to `:root`**
+
+In `src/style.css`, the current `:root` block is:
+
+```css
+:root {
+  font-family: Inter, "PingFang SC", "Microsoft YaHei", sans-serif;
+  color: #202a33;
+  background: #edf0f2;
+  font-synthesis: none;
+  text-rendering: optimizeLegibility;
+  --green-700: #216447;
+  --green-600: #2d7a58;
+  --green-100: #dceee5;
+  --line: #cfd5da;
+  --muted: #68747f;
+  --paper-width: 210mm;
+  --paper-min-height: 297mm;
+}
+```
+
+Replace it with:
+
+```css
+:root {
+  font-family: Inter, "PingFang SC", "Microsoft YaHei", sans-serif;
+  color: #202a33;
+  background: #edf0f2;
+  font-synthesis: none;
+  text-rendering: optimizeLegibility;
+  --green-700: #216447;
+  --green-600: #2d7a58;
+  --green-100: #dceee5;
+  --line: #cfd5da;
+  --muted: #68747f;
+  --paper-width: 210mm;
+  --paper-min-height: 297mm;
+  --radius-sm: 4px;
+  --radius-md: 6px;
+  --radius-lg: 8px;
+  --radius-xl: 12px;
+  --radius-pill: 999px;
+  --space-1: 4px;
+  --space-2: 8px;
+  --space-3: 12px;
+  --space-4: 16px;
+  --space-6: 24px;
+}
+```
+
+- [ ] **Step 2: Swap every hardcoded `border-radius` value onto the matching token (like-for-like, no visual change)**
+
+Make these exact replacements in `src/style.css` (line numbers are pre-edit; re-find by selector if they've shifted from Step 1):
+
+| Line | Selector | Before | After |
+|---|---|---|---|
+| 72 | `.ui-button` | `border-radius: 6px;` | `border-radius: var(--radius-md);` |
+| 114 | `.ui-field,`<br>`.ui-select` | `border-radius: 6px;` | `border-radius: var(--radius-md);` |
+| 186 | `.workspace-toolbar button` | `border-radius: 6px;` | `border-radius: var(--radius-md);` |
+| 288 | `.lesson-sidebar-badge` | `border-radius: 999px;` | `border-radius: var(--radius-pill);` |
+| 430 | `.process-step-actions button` | `border-radius: 4px;` | `border-radius: var(--radius-sm);` |
+| 446 | `.board-design` | `border-radius: 4px;` | `border-radius: var(--radius-sm);` |
+| 456 | `.warning-summary` | `border-radius: 4px;` | `border-radius: var(--radius-sm);` |
+| 472 | `.editable-text` | `border-radius: 4px;` | `border-radius: var(--radius-sm);` |
+| 507 | `.markdown-preview` | `border-radius: 4px;` | `border-radius: var(--radius-sm);` |
+| 532 | `.markdown-source` | `border-radius: 4px;` | `border-radius: var(--radius-sm);` |
+| 551 | `.upload-dropzone` | `border-radius: 12px;` | `border-radius: var(--radius-xl);` |
+| 569 | `.upload-dropzone--compact` | `border-radius: 6px;` | `border-radius: var(--radius-md);` |
+| 603 | `.dialog` | `border-radius: 8px;` | `border-radius: var(--radius-lg);` |
+| 625 | `.dialog-actions button` | `border-radius: 6px;` | `border-radius: var(--radius-md);` |
+| 648 | `.app-notice button` | `border-radius: 4px;` | `border-radius: var(--radius-sm);` |
+| 697 | `.dialog input` | `border-radius: 6px;` | `border-radius: var(--radius-md);` |
+| 718 | `.book-list-item` | `border-radius: 8px;` | `border-radius: var(--radius-lg);` |
+| 741 | `.batch-topics-input` | `border-radius: 6px;` | `border-radius: var(--radius-md);` |
+
+Leave `.batch-progress-bar` and `.batch-progress-fill` (`border-radius: 3px`) unchanged — 3px isn't on the new scale and isn't called out in the spec.
+
+- [ ] **Step 3: Swap the radius in `LoginPage.vue`**
+
+In `src/components/LoginPage.vue`, inside `<style scoped>`, change:
+
+```css
+.login-form {
+  width: min(100%, 340px);
+  display: flex;
+  flex-direction: column;
+  gap: 16px;
+  background: #fff;
+  border: 1px solid var(--line);
+  border-radius: 8px;
+  box-shadow: 0 4px 18px rgba(32, 42, 51, 0.12);
+  padding: 24px;
+}
+```
+
+to:
+
+```css
+.login-form {
+  width: min(100%, 340px);
+  display: flex;
+  flex-direction: column;
+  gap: 16px;
+  background: #fff;
+  border: 1px solid var(--line);
+  border-radius: var(--radius-lg);
+  box-shadow: 0 4px 18px rgba(32, 42, 51, 0.12);
+  padding: 24px;
+}
+```
+
+- [ ] **Step 4: Snap the three off-grid spacing values**
+
+In `src/components/LoginPage.vue`, change `.field`:
+
+```css
+.field {
+  display: flex;
+  flex-direction: column;
+  gap: 6px;
+}
+```
+
+to:
+
+```css
+.field {
+  display: flex;
+  flex-direction: column;
+  gap: var(--space-2);
+}
+```
+
+In `src/style.css`, change `.ui-table th, .ui-table td`:
+
+```css
+.ui-table th,
+.ui-table td {
+  text-align: left;
+  padding: 8px 10px;
+  border-bottom: 1px solid var(--line);
+}
+```
+
+to:
+
+```css
+.ui-table th,
+.ui-table td {
+  text-align: left;
+  padding: var(--space-2) var(--space-2);
+  border-bottom: 1px solid var(--line);
+}
+```
+
+In `src/style.css`, change `.objective-row`:
+
+```css
+.objective-row {
+  display: flex;
+  align-items: baseline;
+  gap: 6px;
+}
+```
+
+to:
+
+```css
+.objective-row {
+  display: flex;
+  align-items: baseline;
+  gap: var(--space-2);
+}
+```
+
+- [ ] **Step 5: Build and verify no visual regression**
+
+Run: `bun run build`
+Expected: exits 0, no TypeScript or Vue compiler errors.
+
+Then, with the dev server running at `http://localhost:5173/`, open the app in a browser and compare against the pre-change appearance (radius values are identical, so nothing should look different):
+- Login page (`/`): card corners, input corners.
+- Book list and admin page (login as `admin`/`admin123`): buttons, table.
+- Open a lesson workspace: toolbar buttons, sidebar badge, editable text fields, dialogs (e.g. open the batch-generate dialog).
+
+Confirm visually that nothing shifted except the three intentional spacing snaps (table cell padding, login field label gap, objective row gap — all changed by at most 2px and should not be perceptible as broken).
+
+- [ ] **Step 6: Commit**
+
+```bash
+git add src/style.css src/components/LoginPage.vue
+git commit -m "feat: add radius/spacing design tokens and apply across styles"
+```
+
+---
+
+### Task 2: Transitions and active states on buttons/editable elements
+
+**Files:**
+- Modify: `src/style.css` (selectors listed below)
+
+**Interfaces:**
+- Consumes: `--green-100`, `--green-600`, `--green-700` (existing tokens).
+- Produces: every button-like selector listed below now has a `transition` declaration and an `:active:not(:disabled)` rule. Task 3 will add `:focus-visible` to the same selector group — keep the group identical so the two tasks compose cleanly: `.ui-button`, `.workspace-toolbar button`, `.dialog-actions button`, `.process-step-actions button`.
+
+- [ ] **Step 1: Add transitions to button selectors**
+
+In `src/style.css`, change:
+
+```css
+.ui-button {
+  border: 1px solid var(--line);
+  background: #fff;
+  border-radius: var(--radius-md);
+  padding: 6px 14px;
+  color: var(--green-700);
+  cursor: pointer;
+  white-space: nowrap;
+}
+```
+
+to:
+
+```css
+.ui-button {
+  border: 1px solid var(--line);
+  background: #fff;
+  border-radius: var(--radius-md);
+  padding: 6px 14px;
+  color: var(--green-700);
+  cursor: pointer;
+  white-space: nowrap;
+  transition: background-color 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
+}
+```
+
+Change:
+
+```css
+.workspace-toolbar button {
+  border: 1px solid var(--line);
+  background: #fff;
+  border-radius: var(--radius-md);
+  padding: 6px 14px;
+  color: var(--green-700);
+  cursor: pointer;
+}
+```
+
+to:
+
+```css
+.workspace-toolbar button {
+  border: 1px solid var(--line);
+  background: #fff;
+  border-radius: var(--radius-md);
+  padding: 6px 14px;
+  color: var(--green-700);
+  cursor: pointer;
+  transition: background-color 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
+}
+```
+
+Change:
+
+```css
+.dialog-actions button {
+  border: 1px solid var(--line);
+  background: #fff;
+  border-radius: var(--radius-md);
+  padding: 6px 14px;
+  cursor: pointer;
+}
+```
+
+to:
+
+```css
+.dialog-actions button {
+  border: 1px solid var(--line);
+  background: #fff;
+  border-radius: var(--radius-md);
+  padding: 6px 14px;
+  cursor: pointer;
+  transition: background-color 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
+}
+```
+
+Change:
+
+```css
+.process-step-actions button {
+  border: 1px solid var(--line);
+  background: #fff;
+  border-radius: var(--radius-sm);
+  padding: 2px 6px;
+  font-size: 12px;
+  cursor: pointer;
+  color: #c0392b;
+}
+```
+
+to:
+
+```css
+.process-step-actions button {
+  border: 1px solid var(--line);
+  background: #fff;
+  border-radius: var(--radius-sm);
+  padding: 2px 6px;
+  font-size: 12px;
+  cursor: pointer;
+  color: #c0392b;
+  transition: background-color 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
+}
+```
+
+Change:
+
+```css
+.editable-text {
+  display: block;
+  width: 100%;
+  border: 1px solid transparent;
+  border-radius: var(--radius-sm);
+  padding: 2px 4px;
+  background: transparent;
+  resize: none;
+  overflow: hidden;
+}
+```
+
+to:
+
+```css
+.editable-text {
+  display: block;
+  width: 100%;
+  border: 1px solid transparent;
+  border-radius: var(--radius-sm);
+  padding: 2px 4px;
+  background: transparent;
+  resize: none;
+  overflow: hidden;
+  transition: background-color 0.15s ease, border-color 0.15s ease;
+}
+```
+
+Change:
+
+```css
+.markdown-preview {
+  min-height: 1.6em;
+  padding: 2px 4px;
+  border-radius: var(--radius-sm);
+  border: 1px solid transparent;
+  cursor: text;
+}
+```
+
+to:
+
+```css
+.markdown-preview {
+  min-height: 1.6em;
+  padding: 2px 4px;
+  border-radius: var(--radius-sm);
+  border: 1px solid transparent;
+  cursor: text;
+  transition: background-color 0.15s ease, border-color 0.15s ease;
+}
+```
+
+- [ ] **Step 2: Add `:active:not(:disabled)` feedback to button selectors**
+
+Add this new rule directly after the `.ui-button--danger:hover:not(:disabled)` rule (currently ending around line 109):
+
+```css
+.ui-button:active:not(:disabled),
+.workspace-toolbar button:active:not(:disabled),
+.dialog-actions button:active:not(:disabled),
+.process-step-actions button:active:not(:disabled) {
+  filter: brightness(0.95);
+}
+```
+
+Using `filter: brightness()` gives every button variant (default, primary, danger) a consistent "pressed" darkening with one rule, instead of hand-picking a darker shade per variant.
+
+- [ ] **Step 3: Build and verify**
+
+Run: `bun run build`
+Expected: exits 0.
+
+In the browser, hover and click (mouse-down, hold) each of: a `.ui-button` (e.g. "返回" on admin page), a workspace toolbar button, a dialog button (open any dialog), a process-step action button (in a lesson's process table), an editable text field, and a markdown preview block. Confirm:
+- Hover transitions smoothly (no instant snap) over ~150ms.
+- Mouse-down on buttons visibly darkens the button while held.
+
+- [ ] **Step 4: Commit**
+
+```bash
+git add src/style.css
+git commit -m "feat: add transitions and active-press feedback to buttons and editable fields"
+```
+
+---
+
+### Task 3: New hover states and shared focus-visible ring
+
+**Files:**
+- Modify: `src/style.css`
+
+**Interfaces:**
+- Consumes: the button selector group from Task 2 (`.ui-button`, `.workspace-toolbar button`, `.dialog-actions button`, `.process-step-actions button`) and `--green-600`.
+- Produces: nothing consumed by later tasks.
+
+- [ ] **Step 1: Add hover tint to non-active sidebar items**
+
+In `src/style.css`, locate `.lesson-sidebar-select` (currently no hover rule) and add a new rule immediately after it:
+
+```css
+.lesson-sidebar-select {
+  flex: 1 1 auto;
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  border: none;
+  background: none;
+  text-align: left;
+  padding: 10px 12px;
+  cursor: pointer;
+  min-width: 0;
+  transition: background-color 0.15s ease;
+}
+
+.lesson-sidebar-item:not(.lesson-sidebar-item--active) .lesson-sidebar-select:hover {
+  background: #f4f6f7;
+}
+```
+
+(The `:not(.lesson-sidebar-item--active)` guard keeps this from fighting with the existing green `--active` background on the selected item.)
+
+- [ ] **Step 2: Add hover tint to table rows**
+
+In `src/style.css`, locate the `.ui-table tr:last-child td` rule and add a new rule right after it:
+
+```css
+.ui-table tr:last-child td {
+  border-bottom: none;
+}
+
+.ui-table tbody tr:hover {
+  background: #f8faf9;
+}
+```
+
+- [ ] **Step 3: Add shared `:focus-visible` ring for buttons**
+
+In `src/style.css`, add this new rule right after the `:active:not(:disabled)` rule added in Task 2 Step 2:
+
+```css
+.ui-button:focus-visible,
+.workspace-toolbar button:focus-visible,
+.dialog-actions button:focus-visible,
+.process-step-actions button:focus-visible {
+  outline: none;
+  border-color: var(--green-600);
+  box-shadow: 0 0 0 2px rgba(45, 122, 88, 0.16);
+}
+```
+
+- [ ] **Step 4: Build and verify**
+
+Run: `bun run build`
+Expected: exits 0.
+
+In the browser:
+- Open a lesson with multiple chapters in the sidebar. Hover a non-active sidebar row → light gray background appears; hover does NOT appear on the currently active (green) row.
+- Hover over admin/book-list table rows → light tint appears per row.
+- Tab (keyboard) through buttons (e.g. admin page header buttons) → a green focus ring appears on the focused button. Click a button with the mouse → no ring appears on click (only on keyboard focus), confirming `:focus-visible` rather than `:focus` is in effect.
+
+- [ ] **Step 5: Commit**
+
+```bash
+git add src/style.css
+git commit -m "feat: add sidebar/table hover tints and focus-visible ring for buttons"
+```
+
+---
+
+### Task 4: Mobile workspace toolbar wrap fix
+
+**Files:**
+- Modify: `src/style.css` (the existing `@media (max-width: 900px)` block, by adding a new sibling media block — do not nest inside it)
+
+**Interfaces:**
+- Consumes: `--space-2`, `--space-4` from Task 1.
+- Produces: nothing consumed by later tasks. This is the last task in the plan.
+
+- [ ] **Step 1: Add the new breakpoint**
+
+In `src/style.css`, the existing responsive block currently ends with:
+
+```css
+@media (max-width: 900px) {
+  .workspace-layout {
+    flex-direction: column;
+  }
+
+  .lesson-sidebar {
+    width: auto;
+    flex: 0 0 auto;
+    max-height: 180px;
+    border-right: none;
+    border-bottom: 1px solid var(--line);
+  }
+
+  .a4-workspace {
+    padding: 6mm;
+  }
+
+  .page {
+    width: 100%;
+    min-height: auto;
+  }
+}
+```
+
+Add a new, separate media block directly after this one (same `/* Responsive */` section, not nested inside the 900px block):
+
+```css
+@media (max-width: 600px) {
+  .workspace-toolbar {
+    height: auto;
+    flex: 0 0 auto;
+    flex-wrap: wrap;
+    padding: var(--space-2) var(--space-4);
+    gap: var(--space-2);
+  }
+
+  .workspace-toolbar button {
+    flex: 0 0 auto;
+  }
+
+  .workspace-toolbar-count {
+    flex: 1 1 100%;
+  }
+}
+```
+
+- [ ] **Step 2: Build**
+
+Run: `bun run build`
+Expected: exits 0.
+
+- [ ] **Step 3: Verify at 390px width**
+
+With the dev server running, open a lesson workspace in the browser and resize/emulate the viewport to 390px wide (e.g. iPhone 12 Pro preset). Confirm:
+- The toolbar's 6 buttons wrap onto two rows, each button keeps its full label on one line (no character-by-character wrapping).
+- The "已选 N 个" count text drops to its own line below the buttons.
+- At desktop width (e.g. 1280px), the toolbar is unchanged from before (single row, fixed 56px height).
+
+- [ ] **Step 4: Commit**
+
+```bash
+git add src/style.css
+git commit -m "fix: wrap workspace toolbar buttons on narrow mobile widths"
+```
+
+---
+
+## Self-Review Notes
+
+- **Spec coverage:** Section 1 (tokens + 3 spacing snaps) → Task 1. Section 2 (transitions, active states, new hovers, focus-visible) → Tasks 2–3. Section 3 (mobile toolbar) → Task 4. Testing section (build + manual desktop/390px check) → covered in every task's verification step.
+- **Out-of-scope guardrails carried into Global Constraints:** no `window.confirm()` → `.dialog` migration, no A4/`print.css` changes, no new dependencies, no markup changes — all stated explicitly so a task executor with zero conversation context doesn't drift into them.
+- **Type/selector consistency:** the four-selector "button group" (`.ui-button`, `.workspace-toolbar button`, `.dialog-actions button`, `.process-step-actions button`) is used identically across Task 2's transitions/active rule and Task 3's focus-visible rule — verified the selector list matches verbatim in both places.