Migrate icon buttons to Button component and simplify size variants

Replace raw <button> elements with Button variant="ghost" in stat-block
panel, toast, player modals. Add icon-sm size variant (h-6 w-6) for
compact contexts. Consolidate text button sizes into a single default
(h-8 px-3), removing the redundant sm variant. Add size prop to
ConfirmButton for consistent sizing.

Button now has three sizes: default (text), icon, icon-sm.

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

apps/web/src/components/action-bar.tsx

@@ -553,9 +553,7 @@ export function ActionBar({
 					</div>
 				)}
 				{!browseMode && nameInput.length >= 2 && !hasSuggestions && (
-					<Button type="submit" size="sm">
+					<Button type="submit">Add</Button>
-						Add
-					</Button>
 				)}
 				{showRollAllInitiative && onRollAllInitiative && (
 					<Button

apps/web/src/components/bulk-import-prompt.tsx

@@ -28,9 +28,7 @@ export function BulkImportPrompt({
 				<div className="rounded-md border border-green-500/50 bg-green-500/10 px-3 py-2 text-sm text-green-400">
 					All sources loaded
 				</div>
-				<Button size="sm" onClick={onDone}>
+				<Button onClick={onDone}>Done</Button>
-					Done
-				</Button>
 			</div>
 		);
 	}
@@ -42,9 +40,7 @@ export function BulkImportPrompt({
 					Loaded {importState.completed}/{importState.total} sources (
 					{importState.failed} failed)
 				</div>
-				<Button size="sm" onClick={onDone}>
+				<Button onClick={onDone}>Done</Button>
-					Done
-				</Button>
 			</div>
 		);
 	}
@@ -103,11 +99,7 @@ export function BulkImportPrompt({
 				/>
 			</div>
 
-			<Button
+			<Button onClick={() => onStartImport(baseUrl)} disabled={isDisabled}>
-				size="sm"
-				onClick={() => onStartImport(baseUrl)}
-				disabled={isDisabled}
-			>
 				Load All
 			</Button>
 		</div>

apps/web/src/components/create-player-modal.tsx

@@ -100,13 +100,14 @@ export function CreatePlayerModal({
 					<h2 className="text-lg font-semibold text-foreground">
 						{isEdit ? "Edit Player" : "Create Player"}
 					</h2>
-					<button
+					<Button
-						type="button"
+						variant="ghost"
+						size="icon"
 						onClick={onClose}
-						className="text-muted-foreground hover:text-foreground transition-colors"
+						className="text-muted-foreground"
 					>
 						<X size={20} />
-					</button>
+					</Button>
 				</div>
 
 				<form onSubmit={handleSubmit} className="flex flex-col gap-4">

apps/web/src/components/hp-adjust-popover.tsx

@@ -6,7 +6,6 @@ import {
 	useRef,
 	useState,
 } from "react";
-import { Button } from "./ui/button";
 import { Input } from "./ui/input";
 
 interface HpAdjustPopoverProps {
@@ -109,30 +108,26 @@ export function HpAdjustPopover({ onAdjust, onClose }: HpAdjustPopoverProps) {
 					}}
 					onKeyDown={handleKeyDown}
 				/>
-				<Button
+				<button
 					type="button"
-					variant="ghost"
-					size="icon"
 					disabled={!isValid}
-					className="h-7 w-7 shrink-0 text-red-400 hover:bg-red-950 hover:text-red-300"
+					className="inline-flex h-7 w-7 shrink-0 items-center justify-center rounded-md text-red-400 transition-colors hover:bg-red-950 hover:text-red-300 disabled:pointer-events-none disabled:opacity-50"
 					onClick={() => applyDelta(-1)}
 					title="Apply damage"
 					aria-label="Apply damage"
 				>
 					<Sword size={14} />
-				</Button>
+				</button>
-				<Button
+				<button
 					type="button"
-					variant="ghost"
-					size="icon"
 					disabled={!isValid}
-					className="h-7 w-7 shrink-0 text-emerald-400 hover:bg-emerald-950 hover:text-emerald-300"
+					className="inline-flex h-7 w-7 shrink-0 items-center justify-center rounded-md text-emerald-400 transition-colors hover:bg-emerald-950 hover:text-emerald-300 disabled:pointer-events-none disabled:opacity-50"
 					onClick={() => applyDelta(1)}
 					title="Apply healing"
 					aria-label="Apply healing"
 				>
 					<Heart size={14} />
-				</Button>
+				</button>
 			</div>
 		</div>
 	);

apps/web/src/components/player-management.tsx

@@ -52,19 +52,20 @@ export function PlayerManagement({
 					<h2 className="text-lg font-semibold text-foreground">
 						Player Characters
 					</h2>
-					<button
+					<Button
-						type="button"
+						variant="ghost"
+						size="icon"
 						onClick={onClose}
-						className="text-muted-foreground hover:text-foreground transition-colors"
+						className="text-muted-foreground"
 					>
 						<X size={20} />
-					</button>
+					</Button>
 				</div>
 
 				{characters.length === 0 ? (
 					<div className="flex flex-col items-center gap-3 py-8 text-center">
 						<p className="text-muted-foreground">No player characters yet</p>
-						<Button onClick={onCreate} size="sm">
+						<Button onClick={onCreate}>
 							<Plus size={16} />
 							Create your first player character
 						</Button>
@@ -78,7 +79,7 @@ export function PlayerManagement({
 							return (
 								<div
 									key={pc.id}
-									className="group flex items-center gap-3 rounded-md px-3 py-2 hover:bg-background/50"
+									className="group flex items-center gap-3 rounded-md px-3 py-2 hover:bg-hover-neutral-bg"
 								>
 									{Icon && (
 										<Icon size={18} style={{ color }} className="shrink-0" />
@@ -92,25 +93,27 @@ export function PlayerManagement({
 									<span className="text-xs tabular-nums text-muted-foreground">
 										HP {pc.maxHp}
 									</span>
-									<button
+									<Button
-										type="button"
+										variant="ghost"
+										size="icon-sm"
 										onClick={() => onEdit(pc)}
-										className="text-muted-foreground hover:text-foreground transition-colors"
+										className="text-muted-foreground"
 										title="Edit"
 									>
 										<Pencil size={14} />
-									</button>
+									</Button>
 									<ConfirmButton
 										icon={<Trash2 size={14} />}
 										label="Delete player character"
 										onConfirm={() => onDelete(pc.id)}
-										className="h-6 w-6 text-muted-foreground"
+										size="icon-sm"
+										className="text-muted-foreground"
 									/>
 								</div>
 							);
 						})}
 						<div className="mt-2 flex justify-end">
-							<Button onClick={onCreate} size="sm" variant="ghost">
+							<Button onClick={onCreate} variant="ghost">
 								<Plus size={16} />
 								Add
 							</Button>

apps/web/src/components/source-fetch-prompt.tsx

@@ -88,11 +88,7 @@ export function SourceFetchPrompt({
 			</div>
 
 			<div className="flex items-center gap-2">
-				<Button
+				<Button onClick={handleFetch} disabled={status === "fetching" || !url}>
-					size="sm"
-					onClick={handleFetch}
-					disabled={status === "fetching" || !url}
-				>
 					{status === "fetching" ? (
 						<Loader2 className="mr-1 h-3 w-3 animate-spin" />
 					) : (
@@ -104,7 +100,6 @@ export function SourceFetchPrompt({
 				<span className="text-xs text-muted-foreground">or</span>
 
 				<Button
-					size="sm"
 					variant="outline"
 					onClick={() => fileInputRef.current?.click()}
 					disabled={status === "fetching"}

apps/web/src/components/source-manager.tsx

@@ -48,7 +48,6 @@ export function SourceManager({ onCacheCleared }: SourceManagerProps) {
 					Cached Sources
 				</span>
 				<Button
-					size="sm"
 					variant="outline"
 					className="hover:text-hover-destructive hover:border-hover-destructive"
 					onClick={handleClearAll}

apps/web/src/components/stat-block-panel.tsx

@@ -8,6 +8,7 @@ import { useSwipeToDismiss } from "../hooks/use-swipe-to-dismiss.js";
 import { BulkImportPrompt } from "./bulk-import-prompt.js";
 import { SourceFetchPrompt } from "./source-fetch-prompt.js";
 import { StatBlock } from "./stat-block.js";
+import { Button } from "./ui/button.js";
 
 interface StatBlockPanelProps {
 	creatureId: CreatureId | null;
@@ -81,36 +82,39 @@ function PanelHeader({
 		<div className="flex items-center justify-between border-b border-border px-4 py-2">
 			<div className="flex items-center gap-1">
 				{panelRole === "browse" && (
-					<button
+					<Button
-						type="button"
+						variant="ghost"
+						size="icon-sm"
 						onClick={onToggleFold}
-						className="text-muted-foreground hover:text-hover-neutral"
+						className="text-muted-foreground"
 						aria-label="Fold stat block panel"
 					>
 						<PanelRightClose className="h-4 w-4" />
-					</button>
+					</Button>
 				)}
 			</div>
 			<div className="flex items-center gap-1">
 				{panelRole === "browse" && showPinButton && (
-					<button
+					<Button
-						type="button"
+						variant="ghost"
+						size="icon-sm"
 						onClick={onPin}
-						className="text-muted-foreground hover:text-hover-neutral"
+						className="text-muted-foreground"
 						aria-label="Pin creature"
 					>
 						<Pin className="h-4 w-4" />
-					</button>
+					</Button>
 				)}
 				{panelRole === "pinned" && (
-					<button
+					<Button
-						type="button"
+						variant="ghost"
+						size="icon-sm"
 						onClick={onUnpin}
-						className="text-muted-foreground hover:text-hover-neutral"
+						className="text-muted-foreground"
 						aria-label="Unpin creature"
 					>
 						<PinOff className="h-4 w-4" />
-					</button>
+					</Button>
 				)}
 			</div>
 		</div>
@@ -195,14 +199,15 @@ function MobileDrawer({
 				{...handlers}
 			>
 				<div className="flex items-center justify-between border-b border-border px-4 py-2">
-					<button
+					<Button
-						type="button"
+						variant="ghost"
+						size="icon-sm"
 						onClick={onDismiss}
-						className="text-muted-foreground hover:text-hover-neutral"
+						className="text-muted-foreground"
 						aria-label="Fold stat block panel"
 					>
 						<PanelRightClose className="h-4 w-4" />
-					</button>
+					</Button>
 				</div>
 				<div className="h-[calc(100%-41px)] overflow-y-auto p-4">
 					{children}

apps/web/src/components/toast.tsx

@@ -1,6 +1,7 @@
 import { X } from "lucide-react";
 import { useEffect } from "react";
 import { createPortal } from "react-dom";
+import { Button } from "./ui/button.js";
 
 interface ToastProps {
 	message: string;
@@ -33,13 +34,14 @@ export function Toast({
 						/>
 					</div>
 				)}
-				<button
+				<Button
-					type="button"
+					variant="ghost"
+					size="icon-sm"
 					onClick={onDismiss}
-					className="text-muted-foreground hover:text-hover-neutral"
+					className="text-muted-foreground"
 				>
 					<X className="h-3 w-3" />
-				</button>
+				</Button>
 			</div>
 		</div>,
 		document.body,

apps/web/src/components/turn-navigation.tsx

@@ -23,6 +23,7 @@ export function TurnNavigation({
 	return (
 		<div className="flex items-center gap-3 rounded-md border border-border bg-card px-4 py-3">
 			<Button
+				variant="outline"
 				size="icon"
 				onClick={onRetreatTurn}
 				disabled={!hasCombatants || isAtStart}
@@ -52,6 +53,7 @@ export function TurnNavigation({
 					className="text-muted-foreground"
 				/>
 				<Button
+					variant="outline"
 					size="icon"
 					onClick={onAdvanceTurn}
 					disabled={!hasCombatants}

apps/web/src/components/ui/button.tsx

@@ -13,9 +13,9 @@ const buttonVariants = cva(
 				ghost: "hover:bg-hover-neutral-bg hover:text-hover-neutral",
 			},
 			size: {
-				default: "h-9 px-4 py-2",
+				default: "h-8 px-3 text-xs",
-				sm: "h-8 px-3 text-xs",
 				icon: "h-8 w-8",
+				"icon-sm": "h-6 w-6",
 			},
 		},
 		defaultVariants: {

apps/web/src/components/ui/confirm-button.tsx

@@ -13,6 +13,7 @@ interface ConfirmButtonProps {
 	readonly onConfirm: () => void;
 	readonly icon: ReactElement;
 	readonly label: string;
+	readonly size?: "icon" | "icon-sm";
 	readonly className?: string;
 	readonly disabled?: boolean;
 }
@@ -23,6 +24,7 @@ export function ConfirmButton({
 	onConfirm,
 	icon,
 	label,
+	size = "icon",
 	className,
 	disabled,
 }: ConfirmButtonProps) {
@@ -94,7 +96,7 @@ export function ConfirmButton({
 		<div ref={wrapperRef} className="inline-flex">
 			<Button
 				variant="ghost"
-				size="icon"
+				size={size}
 				className={cn(
 					className,
 					isConfirming

apps/web/src/components/ui/overflow-menu.tsx

@@ -54,7 +54,7 @@ export function OverflowMenu({ items }: OverflowMenuProps) {
 						<button
 							key={item.label}
 							type="button"
-							className="flex w-full items-center gap-2 px-3 py-1.5 text-left text-sm text-foreground hover:bg-muted/20 disabled:pointer-events-none disabled:opacity-50"
+							className="flex w-full items-center gap-2 px-3 py-1.5 text-left text-sm text-foreground hover:bg-hover-neutral-bg disabled:pointer-events-none disabled:opacity-50"
 							disabled={item.disabled}
 							onClick={() => {
 								item.onClick();

apps/web/src/index.css

@@ -16,7 +16,7 @@
 	--color-hover-neutral: var(--color-primary);
 	--color-hover-action: var(--color-primary);
 	--color-hover-destructive: var(--color-destructive);
-	--color-hover-neutral-bg: var(--color-card);
+	--color-hover-neutral-bg: oklch(0.623 0.214 259 / 0.15);
 	--color-hover-action-bg: var(--color-muted);
 	--color-hover-destructive-bg: transparent;
 	--radius-sm: 0.25rem;

docs/agents/research/2026-03-13-css-classes-buttons-hover.md

@@ -0,0 +1,188 @@
+---
+date: "2026-03-13T15:35:07.699570+00:00"
+git_commit: bd398080008349b47726d0016f4b03587f453833
+branch: main
+topic: "CSS class usage, button categorization, and hover effects across all components"
+tags: [research, codebase, css, tailwind, buttons, hover, ui]
+status: complete
+---
+
+# Research: CSS Class Usage, Button Categorization, and Hover Effects
+
+## Research Question
+How are CSS classes used across all components? How are buttons categorized — are there primary and secondary buttons? What hover effects exist, and are they unified?
+
+## Summary
+
+The project uses **Tailwind CSS v4** with a custom dark theme defined in `index.css` via `@theme`. All class merging goes through a `cn()` utility (clsx + tailwind-merge). Buttons are built on a shared `Button` component using **class-variance-authority (CVA)** with three variants: **default** (primary), **outline**, and **ghost**. Hover effects are partially unified through semantic color tokens (`hover-neutral`, `hover-action`, `hover-destructive`) defined in the theme, but several components use **one-off hardcoded hover colors** that bypass the token system.
+
+## Detailed Findings
+
+### Theme System (`index.css`)
+
+All colors are defined as CSS custom properties via Tailwind v4's `@theme` directive (`index.css:3-26`):
+
+| Token | Value | Purpose |
+|---|---|---|
+| `--color-background` | `#0f172a` | Page background |
+| `--color-foreground` | `#e2e8f0` | Default text |
+| `--color-muted` | `#64748b` | Subdued elements |
+| `--color-muted-foreground` | `#94a3b8` | Secondary text |
+| `--color-card` | `#1e293b` | Card/panel surfaces |
+| `--color-border` | `#334155` | Borders |
+| `--color-primary` | `#3b82f6` | Primary actions (blue) |
+| `--color-accent` | `#3b82f6` | Accent (same as primary) |
+| `--color-destructive` | `#ef4444` | Destructive actions (red) |
+
+**Hover tokens** (semantic layer for hover states):
+
+| Token | Resolves to | Usage |
+|---|---|---|
+| `hover-neutral` | `primary` (blue) | Text color on neutral hover |
+| `hover-action` | `primary` (blue) | Text color on action hover |
+| `hover-destructive` | `destructive` (red) | Text color on destructive hover |
+| `hover-neutral-bg` | `card` (slate) | Background on neutral hover |
+| `hover-action-bg` | `muted` | Background on action hover |
+| `hover-destructive-bg` | `transparent` | Background on destructive hover |
+
+### Button Component (`components/ui/button.tsx`)
+
+Uses CVA with three variants and three sizes:
+
+**Variants:**
+
+| Variant | Base styles | Hover |
+|---|---|---|
+| `default` (primary) | `bg-primary text-primary-foreground` | `hover:bg-primary/90` |
+| `outline` | `border border-border bg-transparent` | `hover:bg-hover-neutral-bg hover:text-hover-neutral` |
+| `ghost` | (no background/border) | `hover:bg-hover-neutral-bg hover:text-hover-neutral` |
+
+**Sizes:**
+
+| Size | Classes |
+|---|---|
+| `default` | `h-9 px-4 py-2` |
+| `sm` | `h-8 px-3 text-xs` |
+| `icon` | `h-8 w-8` |
+
+All variants share: `rounded-md text-sm font-medium transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-primary disabled:pointer-events-none disabled:opacity-50`.
+
+There is **no "secondary" variant** — the outline variant is the closest equivalent.
+
+### Composite Button Components
+
+**ConfirmButton** (`components/ui/confirm-button.tsx`):
+- Wraps `Button variant="ghost" size="icon"`
+- Default state: `hover:text-hover-destructive` (uses token)
+- Confirming state: `bg-destructive text-primary-foreground animate-confirm-pulse hover:bg-destructive hover:text-primary-foreground`
+
+**OverflowMenu** (`components/ui/overflow-menu.tsx`):
+- Trigger: `Button variant="ghost" size="icon"` with `text-muted-foreground hover:text-hover-neutral`
+- Menu items: raw `<button>` elements with `hover:bg-muted/20` (**not using the token system**)
+
+### Button Usage Across Components
+
+| Component | Button type | Variant/Style |
+|---|---|---|
+| `action-bar.tsx:556` | `<Button type="submit">` | default (primary) — "Add" |
+| `action-bar.tsx:561` | `<Button type="button">` | default (primary) — "Roll all" |
+| `turn-navigation.tsx:25,54` | `<Button size="icon">` | default — prev/next turn |
+| `turn-navigation.tsx:47` | `<ConfirmButton>` | ghost+destructive — clear encounter |
+| `source-fetch-prompt.tsx:91` | `<Button size="sm">` | default — "Load" |
+| `source-fetch-prompt.tsx:106` | `<Button size="sm" variant="outline">` | outline — "Upload file" |
+| `bulk-import-prompt.tsx:31,45,106` | `<Button size="sm">` | default — "Done"/"Load All" |
+| `source-manager.tsx:50` | `<Button size="sm" variant="outline">` | outline — "Clear all" |
+| `hp-adjust-popover.tsx:112` | `<Button variant="ghost" size="icon">` | ghost + custom red — damage |
+| `hp-adjust-popover.tsx:124` | `<Button variant="ghost" size="icon">` | ghost + custom green — heal |
+| `player-management.tsx:67` | `<Button>` | default — "Create first player" |
+| `player-management.tsx:113` | `<Button variant="ghost">` | ghost — "Add player" |
+| `create-player-modal.tsx:177` | `<Button variant="ghost">` | ghost — "Cancel" |
+| `create-player-modal.tsx:180` | `<Button type="submit">` | default — "Save"/"Create" |
+| `combatant-row.tsx:625` | `<ConfirmButton>` | ghost+destructive — remove combatant |
+
+**Raw `<button>` elements** (not using the Button component):
+- `action-bar.tsx` — suggestion items, count increment/decrement, browse toggle, custom add (all inline-styled)
+- `combatant-row.tsx` — editable name, HP display, AC, initiative, concentration toggle
+- `stat-block-panel.tsx` — fold/close/pin/unpin buttons
+- `condition-picker.tsx` — condition items
+- `condition-tags.tsx` — condition tags, add condition button
+- `toast.tsx` — dismiss button
+- `player-management.tsx` — close modal, edit player
+- `create-player-modal.tsx` — close modal
+- `color-palette.tsx` — color swatches
+- `icon-grid.tsx` — icon options
+
+### Hover Effects Inventory
+
+**Using semantic tokens (unified):**
+
+| Hover class | Meaning | Used in |
+|---|---|---|
+| `hover:bg-hover-neutral-bg` | Neutral background highlight | button.tsx (outline/ghost), action-bar.tsx, condition-picker.tsx, condition-tags.tsx |
+| `hover:text-hover-neutral` | Text turns primary blue | button.tsx (outline/ghost), action-bar.tsx, combatant-row.tsx, stat-block-panel.tsx, ac-shield.tsx, toast.tsx, overflow-menu.tsx, condition-tags.tsx |
+| `hover:text-hover-action` | Action text (same as neutral) | action-bar.tsx (overflow trigger) |
+| `hover:text-hover-destructive` | Destructive text turns red | confirm-button.tsx, source-manager.tsx |
+| `hover:bg-hover-destructive-bg` | Destructive background (transparent) | source-manager.tsx |
+
+**One-off / hardcoded hover colors (NOT using tokens):**
+
+| Hover class | Used in | Context |
+|---|---|---|
+| `hover:bg-primary/90` | button.tsx (default variant) | Primary button darken |
+| `hover:bg-accent/20` | action-bar.tsx | Suggestion highlight, custom add |
+| `hover:bg-accent/40` | action-bar.tsx | Count +/- buttons, confirm queued |
+| `hover:bg-muted/20` | overflow-menu.tsx | Menu item highlight |
+| `hover:bg-red-950` | hp-adjust-popover.tsx | Damage button |
+| `hover:text-red-300` | hp-adjust-popover.tsx | Damage button text |
+| `hover:bg-emerald-950` | hp-adjust-popover.tsx | Heal button |
+| `hover:text-emerald-300` | hp-adjust-popover.tsx | Heal button text |
+| `hover:text-foreground` | player-management.tsx, create-player-modal.tsx, icon-grid.tsx | Close/edit buttons |
+| `hover:bg-background/50` | player-management.tsx | Player row hover |
+| `hover:bg-card` | icon-grid.tsx | Icon option hover |
+| `hover:border-hover-destructive` | source-manager.tsx | Clear all button border |
+| `hover:scale-110` | color-palette.tsx | Color swatch enlarge |
+| `hover:bg-destructive` | confirm-button.tsx (confirming state) | Maintain red bg on hover |
+| `hover:text-primary-foreground` | confirm-button.tsx (confirming state) | Maintain white text on hover |
+
+### Hover unification assessment
+
+The hover token system (`hover-neutral`, `hover-action`, `hover-destructive`) provides a consistent pattern for the most common interactions. The `Button` component's outline and ghost variants use these tokens, and many inline buttons in action-bar, combatant-row, stat-block-panel, and condition components also use them.
+
+However, there are notable gaps:
+1. **HP adjust popover** uses hardcoded red/green colors (`red-950`, `emerald-950`) instead of tokens
+2. **Overflow menu items** use `hover:bg-muted/20` instead of `hover:bg-hover-neutral-bg`
+3. **Player management modals** use `hover:text-foreground` and `hover:bg-background/50` instead of the semantic tokens
+4. **Action-bar suggestion items** use `hover:bg-accent/20` and `hover:bg-accent/40` — accent-specific patterns not in the token system
+5. **Icon grid** and **color palette** use their own hover patterns (`hover:bg-card`, `hover:scale-110`)
+
+## Code References
+
+- `apps/web/src/index.css:3-26` — Theme color definitions including hover tokens
+- `apps/web/src/components/ui/button.tsx:1-38` — Button component with CVA variants
+- `apps/web/src/components/ui/confirm-button.tsx:93-115` — ConfirmButton with destructive hover states
+- `apps/web/src/components/ui/overflow-menu.tsx:38-72` — OverflowMenu with non-token hover
+- `apps/web/src/components/hp-adjust-popover.tsx:117-129` — Hardcoded red/green hover colors
+- `apps/web/src/components/action-bar.tsx:80-188` — Mixed token and accent-based hovers
+- `apps/web/src/components/combatant-row.tsx:147-629` — Inline buttons with token hovers
+- `apps/web/src/components/player-management.tsx:58-98` — Non-token hover patterns
+- `apps/web/src/components/stat-block-panel.tsx:55-109` — Consistent token usage
+- `apps/web/src/lib/utils.ts:1-5` — `cn()` utility (clsx + twMerge)
+
+## Architecture Documentation
+
+The styling architecture follows this pattern:
+
+1. **Theme layer**: `index.css` defines all color tokens via `@theme`, including semantic hover tokens
+2. **Component layer**: `Button` (CVA) provides the shared button abstraction with three variants
+3. **Composite layer**: `ConfirmButton` and `OverflowMenu` wrap `Button` with additional behavior
+4. **Usage layer**: Components use either `Button` component or raw `<button>` elements with inline Tailwind classes
+
+The `cn()` utility from `lib/utils.ts` is used in 9+ components for conditional class merging.
+
+Custom animations are defined in `index.css` via `@keyframes` + `@utility` pairs: slide-in-right, confirm-pulse, settle-to-bottom, rise-to-center, slide-down-in, slide-up-out, concentration-pulse.
+
+## Open Questions
+
+1. The `hover-action` and `hover-action-bg` tokens are defined but rarely used — `hover-action` appears only once in `action-bar.tsx:565`. Is this intentional or an incomplete migration?
+2. The `accent` color (`#3b82f6`) is identical to `primary` — are they intended to diverge in the future, or is this redundancy?
+3. Should the hardcoded HP adjust colors (red/emerald) be promoted to theme tokens (e.g., `hover-damage`, `hover-heal`)?