diff --git a/button.go b/button.go
index 27b6d0c..83cfa26 100644
--- a/button.go
+++ b/button.go
@@ -25,12 +25,15 @@ type ButtonOptions struct {
 	Icon     *ui.SVG
 	Loading  bool
 	Disabled bool
-	// Label names an icon-only button for assistive technology.
+	// Label names an icon-only button for assistive technology; required without a label.
 	Label string
 }
 
 // Button is a push button. Loading keeps its size and blocks clicks.
 func Button(c *ui.Context, label string, opts ButtonOptions) *ui.Element {
+	if label == "" && opts.Label == "" {
+		panic("mujica: Button without a label needs Label to name it")
+	}
 	k := Tokens(c)
 	d := Density(c)
 	b := ui.ButtonBase(c).MinHeight(d.ControlHeight()).MinWidth(theme.MinHitSize).
@@ -46,13 +49,25 @@ func Button(c *ui.Context, label string, opts ButtonOptions) *ui.Element {
 		b.Border(theme.BorderWidth, border)
 	}
 	b.Children(func() {
-		if opts.Loading {
-			Spinner(c, SpinnerOptions{Size: 14, Color: fg})
-		} else if opts.Icon != nil {
+		switch {
+		case opts.Loading && opts.Icon != nil:
+			// The spinner takes the icon's 16 DIP slot.
+			Spinner(c, SpinnerOptions{Size: 16, Color: fg})
+		case opts.Loading && label == "":
+			Spinner(c, SpinnerOptions{Size: 16, Color: fg})
+		case opts.Loading:
+			// Over the hidden label, so the width stays.
+			ui.Box(c).Absolute().Left(0).Top(0).Right(0).Bottom(0).Center().Children(func() {
+				Spinner(c, SpinnerOptions{Size: 16, Color: fg})
+			})
+		case opts.Icon != nil:
 			ui.Icon(c, opts.Icon).Size(16, 16)
 		}
 		if label != "" {
-			ui.Text(c, label).SingleLine()
+			t := ui.Text(c, label).SingleLine()
+			if opts.Loading && opts.Icon == nil {
+				t.TextColor(fg.Alpha(0))
+			}
 		}
 	})
 	return b
diff --git a/button_group.go b/button_group.go
index b3de134..ab3d6b8 100644
--- a/button_group.go
+++ b/button_group.go
@@ -9,7 +9,7 @@ import (
 	"mujicaui/theme"
 )
 
-// ButtonGroupItem is one button of a ButtonGroup. Give Label, Icon or both.
+// ButtonGroupItem is one button of a ButtonGroup. Give Label, Icon or both; icon-only needs Name.
 type ButtonGroupItem struct {
 	Label string
 	Icon  *ui.SVG
@@ -55,6 +55,9 @@ func ButtonGroup(c *ui.Context, items []ButtonGroupItem, opts ButtonGroupOptions
 			if it.Label == "" && it.Icon == nil {
 				panic("mujica: ButtonGroupItem needs a Label or an Icon")
 			}
+			if it.Label == "" && it.Name == "" {
+				panic("mujica: icon-only ButtonGroupItem needs a Name")
+			}
 			b := ui.ButtonBase(c).Key(i).MinHeight(d.ControlHeight()).MinWidth(d.ControlHeight()).
 				Padding(0, d.Unit()*3).Gap(d.Unit() * 2).Disabled(it.Disabled)
 			internal.Ring(b, k.Focus, theme.ControlRadius)
diff --git a/checkbox.go b/checkbox.go
index de9b5a4..c294aea 100644
--- a/checkbox.go
+++ b/checkbox.go
@@ -26,7 +26,15 @@ func Checkbox(c *ui.Context, value *bool, label string, opts CheckboxOptions) *u
 	}
 	k := Tokens(c)
 	d := Density(c)
-	row := ui.CheckboxBase(c, value).Gap(d.Unit() * 2).MinHeight(d.ControlHeight()).FocusRing(false).Disabled(opts.Disabled)
+	// Disabled on a wrapper blocks the base's click before it toggles.
+	var row *ui.Element
+	wrap := ui.Row(c).Shrink(0).Disabled(opts.Disabled)
+	wrap.Children(func() {
+		row = ui.CheckboxBase(c, value).Gap(d.Unit() * 2).MinHeight(d.ControlHeight()).FocusRing(false)
+	})
+	if opts.Disabled && wrap.FocusWithin() {
+		wrap.FocusRing(false).Focus()
+	}
 	if row.Changed() && opts.Indeterminate && !*value {
 		// From mixed, a click always checks.
 		*value = true
@@ -37,17 +45,9 @@ func Checkbox(c *ui.Context, value *bool, label string, opts CheckboxOptions) *u
 	on, mixed := *value, opts.Indeterminate
 	hover, pressed := row.Hovered(), row.Pressed()
 	row.Children(func() {
-		box := ui.Box(c).Size(checkboxSize, checkboxSize).Shrink(0).Radius(theme.ControlRadius)
-		switch {
-		case on || mixed:
-			box.Background(k.Accent).Border(theme.BorderWidth, k.AccentText)
-		case pressed:
-			box.Background(k.Selection).Border(theme.BorderWidth, k.AccentText)
-		case hover:
-			box.Background(k.SurfaceHover).Border(theme.BorderWidth, k.AccentText)
-		default:
-			box.Background(k.Surface).Border(theme.BorderWidth, k.ControlBorder)
-		}
+		bg, border := checkboxColors(k, on || mixed, hover, pressed)
+		box := ui.Box(c).Size(checkboxSize, checkboxSize).Shrink(0).Radius(theme.ControlRadius).
+			Background(bg).Border(theme.BorderWidth, border)
 		box.Transition(textInputFade)
 		box.DrawOver(func(p *ui.Painter, r ui.Rect) {
 			switch {
@@ -72,6 +72,23 @@ func Checkbox(c *ui.Context, value *bool, label string, opts CheckboxOptions) *u
 	return row
 }
 
+// checkboxColors gives a check box or radio mark its fill and edge.
+func checkboxColors(k theme.Tokens, on, hover, pressed bool) (bg, border ui.Color) {
+	switch {
+	case on && pressed:
+		return k.AccentPressed, k.Text
+	case on && hover:
+		return k.AccentHover, k.Text
+	case on:
+		return k.Accent, k.AccentText
+	case pressed:
+		return k.Selection, k.AccentText
+	case hover:
+		return k.SurfaceHover, k.AccentText
+	}
+	return k.Surface, k.ControlBorder
+}
+
 // CheckboxItem is one box of a CheckboxGroup.
 type CheckboxItem struct {
 	Label    string
diff --git a/docs/components/021-button.md b/docs/components/021-button.md
index 02824ad..ec90fe8 100644
--- a/docs/components/021-button.md
+++ b/docs/components/021-button.md
@@ -18,12 +18,12 @@ if mujica.Button(c, "Save", mujica.ButtonOptions{Icon: icons.Must("check")}).Cli
 
 | 字段 | 类型 | 默认值 | 含义 |
 | --- | --- | --- | --- |
-| `label` | `string` | 必填（仅图标时可为空） | 按钮文字。 |
+| `label` | `string` | 必填（仅图标时可为空） | 按钮文字；为空时必须提供 `Label`，否则 panic。 |
 | `Variant` | `ButtonVariant` | `Primary` | `Primary`、`Secondary`、`Outline`、`Ghost`、`Danger`。 |
 | `Icon` | `*ui.SVG` | `nil` | 文字前的 16 DIP 图标。 |
-| `Loading` | `bool` | `false` | 以菱形加载标记替换图标，保留尺寸与文字，阻止点击。 |
+| `Loading` | `bool` | `false` | 有图标时加载标记占用图标位置；纯文字时标记居中覆盖在隐藏的文字上，宽度不变；阻止点击。 |
 | `Disabled` | `bool` | `false` | 不可点击、不进入 Tab 序列。 |
-| `Label` | `string` | `""` | 无文字按钮的无障碍名称。 |
+| `Label` | `string` | `""` | 无障碍名称；`label` 为空时必填。 |
 
 ## 状态
 
diff --git a/docs/components/023-button-group.md b/docs/components/023-button-group.md
index c394325..db7a2fd 100644
--- a/docs/components/023-button-group.md
+++ b/docs/components/023-button-group.md
@@ -23,7 +23,7 @@ if i := mujica.ButtonGroup(c, items, mujica.ButtonGroupOptions{Label: "Range"}).
 | --- | --- | --- | --- |
 | `Label` | `string` | `""` | 文字；与 `Icon` 至少给一个，否则 panic。 |
 | `Icon` | `*ui.SVG` | `nil` | 图标。 |
-| `Name` | `string` | `""` | 仅图标项的无障碍名称。 |
+| `Name` | `string` | `""` | 仅图标项的无障碍名称；仅图标且为空时 panic。 |
 | `Disabled` | `bool` | `false` | 单项禁用；方向键跳过该项。 |
 
 `ButtonGroupOptions`
diff --git a/docs/components/024-text-input.md b/docs/components/024-text-input.md
index 88649a9..d363468 100644
--- a/docs/components/024-text-input.md
+++ b/docs/components/024-text-input.md
@@ -32,7 +32,7 @@ if r.Submitted() {
 
 ## 状态
 
-默认（Surface 底、ControlBorder 边）、悬停（边框加深）、聚焦（边框 Focus 色；键盘聚焦另加焦点环）、只读（Background 底、Border 边）、错误、禁用。颜色变化 120 毫秒过渡，减少动画时直接切换。
+默认（Surface 底、ControlBorder 边）、悬停（边框加深）、聚焦（边框 Focus 色；键盘聚焦另加焦点环）、只读（Background 底、Border 边）、错误、禁用。聚焦时被禁用会放弃焦点，已排队的按键不再修改值、不触发事件。颜色变化 120 毫秒过渡，减少动画时直接切换。
 
 ## 事件
 
diff --git a/docs/components/025-text-area.md b/docs/components/025-text-area.md
index 32205d8..c4f1b51 100644
--- a/docs/components/025-text-area.md
+++ b/docs/components/025-text-area.md
@@ -25,14 +25,14 @@ if r.Submitted() {
 | `MinHeight` | `float32` | `0`（三行） | 编辑区最小高度，DIP。 |
 | `MaxHeight` | `float32` | `0`（随内容增长） | 编辑区最大高度，超出后滚动；小于 `MinHeight` 时 panic。 |
 | `MaxLength` | `int` | `0`（不显示） | 显示“当前 / 上限”字数（按 Unicode 字符计）；超出时变红并提示超出数量。 |
-| `SubmitKey` / `SubmitMods` | `ui.Key` / `ui.Modifiers` | Cmd+Enter（非 macOS 为 Ctrl+Enter） | 提交快捷键；`SubmitKey` 为零时使用默认值。 |
+| `SubmitKey` / `SubmitMods` | `ui.Key` / `ui.Modifiers` | Cmd+Enter（非 macOS 为 Ctrl+Enter） | 提交快捷键；`SubmitKey` 为零时使用默认值。可设为不带修饰键的 Enter，此时 Shift+Enter 换行。 |
 | `Disabled` | `bool` | `false` | 禁用。 |
 | `ReadOnly` | `bool` | `false` | 只读，可选择复制。 |
 | `Error` | `string` | `""` | 错误文字；为空且超出 `MaxLength` 时自动显示超出提示。 |
 
 ## 状态
 
-默认、悬停、聚焦、只读、错误、禁用，表现同 TextInput。
+默认、悬停、聚焦、只读、错误、禁用，表现同 TextInput；聚焦时被禁用会放弃焦点，之后的输入与提交都不生效。
 
 ## 事件
 
@@ -40,10 +40,10 @@ if r.Submitted() {
 
 ## 键盘操作
 
-Enter 与 Shift+Enter 换行；提交快捷键提交；方向键、PageUp/PageDown 移动光标并滚动；撤销、剪贴板与输入法同 TextInput。
+未配置为提交键时 Enter 与 Shift+Enter 换行；提交快捷键在编辑器处理前被截获并提交，不插入换行；方向键、PageUp/PageDown 移动光标并滚动；撤销、剪贴板与输入法同 TextInput。
 
 ## 限制
 
 - `MaxLength` 只提示，不截断输入，以免打断输入法组合与粘贴。
-- 提交快捷键不能是不带修饰键的 Enter：MyGo 编辑器先接收 Enter 并插入换行（`editor.go:161`）。
+- 输入法组合期间无法阻止提交快捷键：MyGo 不公开组合状态，组合文本存在未导出的 `editor.compose`（`ui/editor.go:73`），带编辑器的元素收不到 `InputCompose` 事件（`ui/input.go:689`）。各平台输入法在组合时通常自己消费 Enter；只有未被输入法消费的按键会触发提交。
 - 只读实现方式同 TextInput。
diff --git a/docs/components/026-number-input.md b/docs/components/026-number-input.md
index 82865f7..2c67ff0 100644
--- a/docs/components/026-number-input.md
+++ b/docs/components/026-number-input.md
@@ -21,7 +21,7 @@ if mujica.NumberInput(c, &copies, mujica.NumberInputOptions{Min: 1, Max: 99, Lab
 | `value` | `*float64` | 必填 | 数值；空值用 `math.NaN()` 表示，仅在 `AllowEmpty` 时允许。 |
 | `Min` / `Max` | `float64` | 都为 0 | 范围；相等（含零值）表示不限范围；`Min > Max` 时 panic。 |
 | `Step` | `float64` | `1` | 方向键与按钮的步长；负数 panic。 |
-| `Precision` | `int` | 取 `Step` 的小数位 | 保留与显示的小数位。 |
+| `Precision` | `int` | 取 `Step` 的小数位 | 保留与显示的小数位。范围边界向内取到该精度上（如 [0.11, 0.29] 精度 1 时有效值只有 0.2）；范围内没有任何该精度的值时 panic。 |
 | `AllowEmpty` | `bool` | `false` | 允许清空，值变为 NaN；从空值步进时从 0（夹在范围内）开始。 |
 | `StepperOnly` | `bool` | `false` | 只显示数值与上下箭头，不可输入；必须给出 `Min < Max`，且不能与 `AllowEmpty` 同用。 |
 | `Placeholder` | `string` | `""` | 空值时的占位。 |
@@ -31,7 +31,7 @@ if mujica.NumberInput(c, &copies, mujica.NumberInputOptions{Min: 1, Max: 99, Lab
 
 ## 状态
 
-输入模式同 TextInput；输入非数字或超出范围时显示内置错误（“请输入数字”“请输入 a 到 b 之间的数字”），值保持上一次有效值；失去焦点后文本恢复为当前值并清除该错误。到达边界时对应按钮禁用。
+输入模式同 TextInput；输入非数字或超出范围时显示内置错误（“请输入数字”“请输入 a 到 b 之间的数字”），值保持上一次有效值；失去焦点后错误文本与提示保留，直到用户改正，或调用方从外部改变了值。值在聚焦期间被外部修改时，输入框立即显示新值。到达边界时对应按钮禁用。
 
 ## 事件
 
diff --git a/docs/components/028-search-input.md b/docs/components/028-search-input.md
index 8d074bc..afec587 100644
--- a/docs/components/028-search-input.md
+++ b/docs/components/028-search-input.md
@@ -48,4 +48,5 @@ if r.Moved() {
 ## 限制
 
 - MyGo 单行编辑器把 Shift+Enter 当作普通提交且不公开修饰键（`editor.go:489`，`submitMods` 未导出），组件用 `HandleInput` 先截获 Shift+Enter。
+- 输入法组合期间无法阻止提交与匹配跳转：MyGo 不公开组合状态，组合文本存在未导出的 `editor.compose`（`ui/editor.go:73`），带编辑器的元素收不到 `InputCompose` 事件（`ui/input.go:689`）。各平台输入法在组合时通常自己消费 Enter；只有未被输入法消费的按键会触发提交或跳转。
 - 没有“完成/关闭”按钮；是否显示查找栏由调用方决定。
diff --git a/docs/components/029-checkbox.md b/docs/components/029-checkbox.md
index 2e88b84..d71bae6 100644
--- a/docs/components/029-checkbox.md
+++ b/docs/components/029-checkbox.md
@@ -33,7 +33,7 @@ func CheckboxGroup(c *ui.Context, label string, items []CheckboxItem, opts Check
 
 ## 状态
 
-未选（Surface 底、ControlBorder 边）、悬停与按下（AccentText 边）、选中（酒红底、象牙白勾）、半选（酒红底、象牙白横线）、键盘聚焦（方框外焦点环）、禁用。行高不低于密度控件高度。
+未选（Surface 底、ControlBorder 边）、悬停与按下（AccentText 边）、选中（酒红底、象牙白勾；悬停与按下时底色加深、边框变为正文色）、半选（酒红底、象牙白横线）、键盘聚焦（方框外焦点环）、禁用。行高不低于密度控件高度。
 
 全选框：全部选中为选中，部分选中为半选，全不选为未选。点击时若可用项未全选则全部勾选，否则全部清除；禁用项保持不变。
 
diff --git a/docs/components/030-radio-group.md b/docs/components/030-radio-group.md
index f421a8e..85e7886 100644
--- a/docs/components/030-radio-group.md
+++ b/docs/components/030-radio-group.md
@@ -37,7 +37,7 @@ if mujica.RadioGroup(c, &size, items, mujica.RadioGroupOptions{Label: "Size"}).C
 
 ## 状态
 
-未选（空心圆）、悬停与按下（AccentText 边）、选中（酒红实心圆与象牙白圆点）、键盘聚焦、禁用。
+未选（空心圆）、悬停与按下（AccentText 边）、选中（酒红实心圆与象牙白圆点；悬停与按下时底色加深、边框变为正文色）、键盘聚焦、禁用。
 
 ## 事件
 
@@ -49,4 +49,6 @@ Tab 进入组并落在已选项；Up/Down/Left/Right 移动并直接选择，循
 
 ## 限制
 
+- 每个选项以 `Value` 为键，选项重新排序后焦点仍跟随原来的值。
+
 - 方向键对横向与纵向组都同时响应上下左右（MyGo `RadioGroup` 固定使用 `Horizontal|Vertical`）。
diff --git a/input_review_test.go b/input_review_test.go
new file mode 100644
index 0000000..df53518
--- /dev/null
+++ b/input_review_test.go
@@ -0,0 +1,187 @@
+package mujica
+
+import (
+	"bytes"
+	"testing"
+
+	"github.com/egoist/mygo/ui"
+
+	"mujicaui/icons"
+)
+
+func TestButtonLoadingKeepsWidth(t *testing.T) {
+	for _, icon := range []*ui.SVG{nil, icons.Must("check")} {
+		loading := false
+		var w float32
+		tt := ui.NewTester(func(c *ui.Context) {
+			Use(c, Settings{})
+			ui.Row(c).Children(func() {
+				w = Button(c, "Save", ButtonOptions{Icon: icon, Loading: loading}).Bounds().W
+			})
+		}, 300, 200)
+		tt.Frame()
+		before := w
+		loading = true
+		tt.Frame()
+		tt.Frame()
+		if w != before || !tt.HasText("Save") {
+			t.Fatalf("icon %v: width %v -> %v, texts %q", icon != nil, before, w, tt.Texts())
+		}
+	}
+}
+
+func inputReviewPanics(t *testing.T, name string, view func(c *ui.Context)) {
+	t.Helper()
+	defer func() {
+		if recover() == nil {
+			t.Errorf("%s: no panic", name)
+		}
+	}()
+	ui.NewTester(func(c *ui.Context) {
+		Use(c, Settings{})
+		view(c)
+	}, 200, 100)
+}
+
+func TestIconOnlyButtonsNeedNames(t *testing.T) {
+	inputReviewPanics(t, "Button", func(c *ui.Context) {
+		Button(c, "", ButtonOptions{Icon: icons.Must("x")})
+	})
+	inputReviewPanics(t, "ButtonGroup", func(c *ui.Context) {
+		ButtonGroup(c, []ButtonGroupItem{{Icon: icons.Must("bold")}}, ButtonGroupOptions{})
+	})
+}
+
+func TestTextInputDisabledWhileFocused(t *testing.T) {
+	s, off, focused, changes := "", false, false, 0
+	tt := ui.NewTester(func(c *ui.Context) {
+		Use(c, Settings{})
+		r := TextInput(c, &s, TextInputOptions{Label: "Name", Disabled: off})
+		focused = r.Input.Focused()
+		if r.Changed() || r.Submitted() {
+			changes++
+		}
+	}, 400, 200)
+	_ = tt.Click("Name")
+	tt.Type("a")
+	off = true
+	tt.Type("b")
+	tt.Key(0, ui.KeyEnter)
+	tt.Frame()
+	if s != "a" || changes != 1 || focused {
+		t.Fatalf("value %q events %d focused %v", s, changes, focused)
+	}
+}
+
+func TestTextAreaDisabledWhileFocused(t *testing.T) {
+	s, off := "", false
+	tt := ui.NewTester(func(c *ui.Context) {
+		Use(c, Settings{})
+		TextArea(c, &s, TextAreaOptions{Label: "Notes", Disabled: off})
+	}, 400, 300)
+	_ = tt.Click("Notes")
+	off = true
+	tt.Type("late")
+	if s != "" {
+		t.Fatalf("disabled area took %q", s)
+	}
+}
+
+func TestCheckboxDisabledWhileFocused(t *testing.T) {
+	on, off, focused := false, false, false
+	tt := ui.NewTester(func(c *ui.Context) {
+		Use(c, Settings{})
+		focused = Checkbox(c, &on, "Sync", CheckboxOptions{Disabled: off}).Focused()
+	}, 300, 200)
+	tt.Key(0, ui.KeyTab)
+	off = true
+	tt.Key(0, ui.KeySpace)
+	tt.Frame()
+	if on || focused {
+		t.Fatalf("checked %v focused %v", on, focused)
+	}
+}
+
+func TestRadioGroupDisabledWhileFocused(t *testing.T) {
+	v, off := "a", false
+	items := []RadioItem[string]{{Value: "a", Label: "A"}, {Value: "b", Label: "B"}}
+	tt := ui.NewTester(func(c *ui.Context) {
+		Use(c, Settings{})
+		RadioGroup(c, &v, items, RadioGroupOptions{Disabled: off})
+	}, 300, 200)
+	tt.Key(0, ui.KeyTab)
+	off = true
+	tt.Key(0, ui.KeyDown)
+	tt.Key(0, ui.KeySpace)
+	if v != "a" {
+		t.Fatalf("disabled group chose %q", v)
+	}
+}
+
+func TestTextAreaPlainEnterSubmits(t *testing.T) {
+	s, submits := "", 0
+	tt := ui.NewTester(func(c *ui.Context) {
+		Use(c, Settings{})
+		if TextArea(c, &s, TextAreaOptions{Label: "Chat", SubmitKey: ui.KeyEnter}).Submitted() {
+			submits++
+		}
+	}, 400, 300)
+	_ = tt.Click("Chat")
+	tt.Type("hi")
+	tt.Key(0, ui.KeyEnter)
+	tt.Key(ui.Shift, ui.KeyEnter)
+	if submits != 1 || s != "hi\n" {
+		t.Fatalf("submits %d value %q", submits, s)
+	}
+}
+
+func TestRadioGroupFocusFollowsValue(t *testing.T) {
+	v := ""
+	items := []RadioItem[string]{{Value: "a", Label: "A"}, {Value: "b", Label: "B"}}
+	tt := ui.NewTester(func(c *ui.Context) {
+		Use(c, Settings{})
+		RadioGroup(c, &v, items, RadioGroupOptions{})
+	}, 300, 200)
+	tt.Key(0, ui.KeyTab)
+	items[0], items[1] = items[1], items[0]
+	tt.Frame()
+	tt.Key(0, ui.KeySpace)
+	if v != "a" {
+		t.Fatalf("Space after reordering chose %q, want a", v)
+	}
+}
+
+// inputReviewStates renders view plain, hovered and pressed at the named element.
+func inputReviewStates(t *testing.T, name string, view func(c *ui.Context)) (plain, hover, pressed []byte) {
+	t.Helper()
+	tt := ui.NewTester(func(c *ui.Context) {
+		Use(c, Settings{Mode: Dark})
+		view(c)
+	}, 300, 200)
+	tt.SetPreferences(ui.Preferences{ReduceMotion: true, TextScale: 1})
+	r, ok := tt.Find(name)
+	if !ok {
+		t.Fatalf("no %q", name)
+	}
+	plain = encode(t, tt.Image())
+	tt.Move(r.X+r.W/2, r.Y+r.H/2)
+	hover = encode(t, tt.Image())
+	tt.Press(r.X+r.W/2, r.Y+r.H/2)
+	pressed = encode(t, tt.Image())
+	return
+}
+
+func TestCheckedMarksShowHoverAndPress(t *testing.T) {
+	on, v := true, "a"
+	for name, view := range map[string]func(c *ui.Context){
+		"Sync": func(c *ui.Context) { Checkbox(c, &on, "Sync", CheckboxOptions{}) },
+		"A": func(c *ui.Context) {
+			RadioGroup(c, &v, []RadioItem[string]{{Value: "a", Label: "A"}}, RadioGroupOptions{})
+		},
+	} {
+		plain, hover, pressed := inputReviewStates(t, name, view)
+		if bytes.Equal(plain, hover) || bytes.Equal(hover, pressed) {
+			t.Errorf("%s: checked state hides hover (%v) or press (%v)", name, bytes.Equal(plain, hover), bytes.Equal(hover, pressed))
+		}
+	}
+}
diff --git a/number_input.go b/number_input.go
index a781378..efed56a 100644
--- a/number_input.go
+++ b/number_input.go
@@ -47,12 +47,15 @@ func (s numberInputSpec) format(v float64) string {
 	return strconv.FormatFloat(v, 'f', s.decimals, 64)
 }
 
-// clamp bounds v and rounds it to the precision.
+// clamp rounds v to the precision, then bounds it; the bounds sit on that grid.
 func (s numberInputSpec) clamp(v float64) float64 {
 	p := math.Pow(10, float64(s.decimals))
-	return math.Round(math.Max(s.lo, math.Min(s.hi, v))*p) / p
+	return math.Max(s.lo, math.Min(s.hi, math.Round(v*p)/p))
 }
 
+// numberInputSame reports equal values, counting NaN (empty) as equal.
+func numberInputSame(a, b float64) bool { return a == b || math.IsNaN(a) && math.IsNaN(b) }
+
 func numberInputResolve(opts NumberInputOptions) numberInputSpec {
 	s := numberInputSpec{lo: opts.Min, hi: opts.Max, step: opts.Step, decimals: opts.Precision}
 	if s.lo > s.hi {
@@ -75,6 +78,13 @@ func numberInputResolve(opts NumberInputOptions) numberInputSpec {
 			s.decimals = len(t) - strings.IndexByte(t, '.') - 1
 		}
 	}
+	// Bounds move inward onto the precision grid, so clamped values keep both.
+	p := math.Pow(10, float64(s.decimals))
+	s.lo = math.Ceil(math.Round(s.lo*p*1e6)/1e6) / p
+	s.hi = math.Floor(math.Round(s.hi*p*1e6)/1e6) / p
+	if s.lo > s.hi {
+		panic("mujica: NumberInput has no value in range at this precision")
+	}
 	return s
 }
 
@@ -114,12 +124,18 @@ func NumberInput(c *ui.Context, value *float64, opts NumberInputOptions) InputRe
 	r.Element, r.Input = textInputFrame(c, look, func(frame *ui.Element) *ui.Element {
 		text := ui.Local(frame, "text", func() string { return s.format(*value) })
 		invalid := ui.Local(frame, "invalid", func() string { return "" })
-		in := ui.TextInputBase(c, text).Grow(1).MinWidth(Density(c).Unit() * 12).
+		seen := ui.Local(frame, "seen", func() float64 { return *value })
+		if !numberInputSame(*seen, *value) {
+			// Set from outside: the text follows, and a typing error goes.
+			*text, *invalid = s.format(*value), ""
+		}
+		in := textInputEditor(c, frame, text, opts.Disabled, ui.TextInputBase).Grow(1).MinWidth(Density(c).Unit() * 12).
 			Placeholder(opts.Placeholder).Label(opts.Label)
-		if in.Changed() {
+		if in.Changed() && !opts.Disabled {
 			*invalid = numberInputParse(c, s, *text, opts.AllowEmpty, set)
 		}
 		switch {
+		case opts.Disabled:
 		case in.Shortcut(0, ui.KeyUp):
 			stepBy(1)
 			*text, *invalid = s.format(*value), ""
@@ -127,9 +143,11 @@ func NumberInput(c *ui.Context, value *float64, opts NumberInputOptions) InputRe
 			stepBy(-1)
 			*text, *invalid = s.format(*value), ""
 		}
-		if !in.Focused() {
-			*text, *invalid = s.format(*value), ""
+		if !in.Focused() && *invalid == "" {
+			// Leaving shows the value rounded; invalid text stays to be fixed.
+			*text = s.format(*value)
 		}
+		defer func() { *seen = *value }()
 		for _, b := range []struct {
 			name  string
 			icon  string
diff --git a/number_input_test.go b/number_input_test.go
index 5259557..1109778 100644
--- a/number_input_test.go
+++ b/number_input_test.go
@@ -63,8 +63,81 @@ func TestNumberInputTypingPrecisionAndErrors(t *testing.T) {
 		t.Fatalf("out of range: value %v texts %q", v, tt.Texts())
 	}
 	_ = tt.Click("Elsewhere")
-	if tt.HasText("Enter a number") {
-		t.Fatal("error stays after leaving the field, which shows the value again")
+	if v != 1.25 || !tt.HasText("Enter a number from 0.00 to 2.00") {
+		t.Fatalf("leaving dropped the error: value %v texts %q", v, tt.Texts())
+	}
+}
+
+func TestNumberInputKeepsInvalidTextAfterBlur(t *testing.T) {
+	v, n := 1.0, 0
+	tt := numberInputTester(&v, &n, NumberInputOptions{Label: "Count"})
+	_ = tt.Click("Count")
+	tt.Command("selectAll")
+	tt.Type("abc")
+	_ = tt.Click("Elsewhere")
+	if !tt.HasText("Enter a number") || v != 1 {
+		t.Fatalf("after blur: value %v texts %q", v, tt.Texts())
+	}
+	_ = tt.Click("Count")
+	tt.Command("selectAll")
+	tt.Command("copy")
+	if tt.Clipboard() != "abc" {
+		t.Fatalf("invalid text replaced by %q", tt.Clipboard())
+	}
+	tt.Type("4")
+	if v != 4 || tt.HasText("Enter a number") {
+		t.Fatalf("correction: value %v texts %q", v, tt.Texts())
+	}
+}
+
+func TestNumberInputSyncsExternalValue(t *testing.T) {
+	v, n := 1.0, 0
+	tt := numberInputTester(&v, &n, NumberInputOptions{Label: "Level"})
+	_ = tt.Click("Level")
+	v = 9
+	tt.Frame()
+	tt.Command("selectAll")
+	tt.Command("copy")
+	if tt.Clipboard() != "9" {
+		t.Fatalf("focused field shows %q after the value became 9", tt.Clipboard())
+	}
+	tt.Key(0, ui.KeyUp)
+	if v != 10 {
+		t.Fatalf("Up after external change gave %v", v)
+	}
+}
+
+func TestNumberInputRangeOnPrecisionGrid(t *testing.T) {
+	v, n := 0.2, 0
+	tt := numberInputTester(&v, &n, NumberInputOptions{Min: 0.11, Max: 0.29, Step: 0.1, Label: "Fine"})
+	_ = tt.Click("Fine")
+	tt.Key(0, ui.KeyUp)
+	if v != 0.2 {
+		t.Fatalf("stepping up left the range: %v", v)
+	}
+	tt.Key(0, ui.KeyDown)
+	if v != 0.2 {
+		t.Fatalf("stepping down left the range: %v", v)
+	}
+}
+
+func TestNumberInputDisabledWhileFocused(t *testing.T) {
+	v, n, off, focused := 5.0, 0, false, false
+	tt := ui.NewTester(func(c *ui.Context) {
+		Use(c, Settings{})
+		r := NumberInput(c, &v, NumberInputOptions{Label: "Live", Disabled: off})
+		if r.Changed() {
+			n++
+		}
+		focused = r.Input.Focused()
+	}, 400, 300)
+	_ = tt.Click("Live")
+	off = true
+	tt.Key(0, ui.KeyUp)
+	tt.Type("7")
+	tt.Frame()
+	if v != 5 || n != 0 || focused {
+		t.Fatalf("disabled while focused: value %v changes %d focused %v", v, n, focused)
 	}
 }
 
@@ -112,7 +185,7 @@ func TestNumberInputDisabled(t *testing.T) {
 }
 
 func TestNumberInputBadOptionsPanic(t *testing.T) {
-	for _, opts := range []NumberInputOptions{{Min: 3, Max: 1}, {StepperOnly: true}, {Step: -1}} {
+	for _, opts := range []NumberInputOptions{{Min: 3, Max: 1}, {StepperOnly: true}, {Step: -1}, {Min: 0.11, Max: 0.19, Precision: 1}} {
 		func() {
 			defer func() {
 				if recover() == nil {
diff --git a/password_input.go b/password_input.go
index 25d07ca..4c025c1 100644
--- a/password_input.go
+++ b/password_input.go
@@ -36,14 +36,14 @@ func PasswordInput(c *ui.Context, value *string, opts PasswordInputOptions) Inpu
 			mode = "shown"
 		}
 		ui.Row(c).Key(mode).Grow(1).Children(func() {
-			in = ui.TextInputBase(c, value).Grow(1).MinWidth(Density(c).Unit() * 10).
+			in = textInputEditor(c, frame, value, opts.Disabled, ui.TextInputBase).Grow(1).MinWidth(Density(c).Unit() * 10).
 				Placeholder(opts.Placeholder).Label(opts.Label)
 			if !*shown {
 				in.Password()
 			}
 		})
-		r.changed = in.Changed()
-		r.submitted = in.Submitted()
+		r.changed = in.Changed() && !opts.Disabled
+		r.submitted = in.Submitted() && !opts.Disabled
 		if passwordInputToggle(c, *shown) {
 			*shown = !*shown
 			slog.Debug("mujica: password_input reveal", "shown", *shown)
diff --git a/radio_group.go b/radio_group.go
index df0b3d4..b0ac1a8 100644
--- a/radio_group.go
+++ b/radio_group.go
@@ -43,37 +43,44 @@ func RadioGroup[T comparable](c *ui.Context, value *T, items []RadioItem[T], opt
 	k := Tokens(c)
 	d := Density(c)
 	var r InputResult
-	r.Element = ui.RadioGroup(c, func() {
-		for _, it := range items {
-			if radioGroupItem(c, k, d, value, it) {
-				r.changed = true
-				slog.Debug("mujica: radio_group choose", "label", it.Label)
+	// Disabled on a wrapper blocks the bases' clicks before they choose.
+	wrap := ui.Box(c).Shrink(0).Disabled(opts.Disabled)
+	wrap.Children(func() {
+		r.Element = ui.RadioGroup(c, func() {
+			for _, it := range items {
+				if radioGroupItem(c, k, d, value, it) {
+					r.changed = true
+					slog.Debug("mujica: radio_group choose", "label", it.Label)
+				}
 			}
-		}
-	}).Label(opts.Label).Disabled(opts.Disabled).Gap(0)
+		}).Label(opts.Label).Gap(0)
+	})
 	if opts.Horizontal {
 		r.Element.Row().Gap(d.Unit() * 6)
 	}
+	if opts.Disabled && wrap.FocusWithin() {
+		wrap.FocusRing(false).Focus()
+	}
 	return r
 }
 
 // radioGroupItem builds one radio and reports whether it was chosen.
 func radioGroupItem[T comparable](c *ui.Context, k theme.Tokens, d theme.Density, value *T, it RadioItem[T]) bool {
-	row := ui.RadioBase(c, value, it.Value).Gap(d.Unit() * 2).MinHeight(d.ControlHeight()).FocusRing(false).Disabled(it.Disabled)
+	// Keyed by value so focus follows the item, not its position.
+	var row *ui.Element
+	item := ui.Box(c).Key(it.Value).Disabled(it.Disabled)
+	item.Children(func() {
+		row = ui.RadioBase(c, value, it.Value).Gap(d.Unit() * 2).MinHeight(d.ControlHeight()).FocusRing(false)
+	})
+	if it.Disabled && item.FocusWithin() {
+		item.FocusRing(false).Focus()
+	}
 	on := *value == it.Value
 	hover, pressed := row.Hovered(), row.Pressed()
 	row.Children(func() {
-		dot := ui.Box(c).Size(checkboxSize, checkboxSize).Shrink(0).Radius(checkboxSize / 2)
-		switch {
-		case on:
-			dot.Background(k.Accent).Border(theme.BorderWidth, k.AccentText)
-		case pressed:
-			dot.Background(k.Selection).Border(theme.BorderWidth, k.AccentText)
-		case hover:
-			dot.Background(k.SurfaceHover).Border(theme.BorderWidth, k.AccentText)
-		default:
-			dot.Background(k.Surface).Border(theme.BorderWidth, k.ControlBorder)
-		}
+		bg, border := checkboxColors(k, on, hover, pressed)
+		dot := ui.Box(c).Size(checkboxSize, checkboxSize).Shrink(0).Radius(checkboxSize/2).
+			Background(bg).Border(theme.BorderWidth, border)
 		dot.Transition(textInputFade)
 		dot.DrawOver(func(p *ui.Painter, r ui.Rect) {
 			if on {
diff --git a/search_input.go b/search_input.go
index 7a1af8f..176b042 100644
--- a/search_input.go
+++ b/search_input.go
@@ -60,7 +60,7 @@ func SearchInput(c *ui.Context, query *string, opts SearchInputOptions) SearchIn
 	}
 	var r SearchInputResult
 	step := func(d int) {
-		if opts.Matches == 0 {
+		if opts.Matches == 0 || opts.Disabled {
 			return
 		}
 		*opts.Current = (*opts.Current + d + opts.Matches) % opts.Matches
@@ -83,8 +83,8 @@ func SearchInput(c *ui.Context, query *string, opts SearchInputOptions) SearchIn
 	r.Element, r.Input = textInputFrame(c, look, func(frame *ui.Element) *ui.Element {
 		ui.Icon(c, icons.Must("search")).Size(16, 16).Shrink(0).TextColor(k.TextMuted)
 		back := ui.Local(frame, "back", func() bool { return false })
-		in := ui.TextInputBase(c, query).Grow(1).MinWidth(Density(c).Unit() * 10).Placeholder(place).Label(name)
-		r.changed = in.Changed()
+		in := textInputEditor(c, frame, query, opts.Disabled, ui.TextInputBase).Grow(1).MinWidth(Density(c).Unit() * 10).Placeholder(place).Label(name)
+		r.changed = in.Changed() && !opts.Disabled
 		if opts.Find {
 			// Shift+Enter would reach the editor as a plain submit.
 			in.HandleInput(func(ev ui.InputEvent) bool {
@@ -102,9 +102,9 @@ func SearchInput(c *ui.Context, query *string, opts SearchInputOptions) SearchIn
 				step(1)
 			}
 		} else {
-			r.submitted = in.Submitted()
+			r.submitted = in.Submitted() && !opts.Disabled
 		}
-		if *query != "" && textInputClear(c, in) {
+		if *query != "" && !opts.Disabled && textInputClear(c, in) {
 			*query = ""
 			r.changed = true
 			slog.Debug("mujica: search_input clear")
@@ -127,7 +127,7 @@ func searchInputFindControls(c *ui.Context, query string, matches, current int,
 	case matches > 0:
 		status = fmt.Sprintf(msg(c, "search_input.count"), current+1, matches)
 	}
-	ui.Text(c, status).TextColor(k.TextMuted).FontSize(theme.CaptionSize).FontFeatures("tnum").
+	ui.Text(c, status).TextColor(k.TextMuted).FontSize(FontSize(c, theme.CaptionSize)).FontFeatures("tnum").
 		SingleLine().Shrink(0).Role(ui.RoleStatus)
 	ui.Box(c).Width(theme.BorderWidth).Height(16).Background(k.Border).Shrink(0)
 	opts := IconButtonOptions{Variant: Ghost, Disabled: matches == 0}
diff --git a/testdata/snapshots/darwin/button-comfortable-dark.png b/testdata/snapshots/darwin/button-comfortable-dark.png
index 6167924..afce442 100644
Binary files a/testdata/snapshots/darwin/button-comfortable-dark.png and b/testdata/snapshots/darwin/button-comfortable-dark.png differ
diff --git a/testdata/snapshots/darwin/button-comfortable-light.png b/testdata/snapshots/darwin/button-comfortable-light.png
index cf71679..0980b9b 100644
Binary files a/testdata/snapshots/darwin/button-comfortable-light.png and b/testdata/snapshots/darwin/button-comfortable-light.png differ
diff --git a/testdata/snapshots/darwin/button-compact-dark.png b/testdata/snapshots/darwin/button-compact-dark.png
index 73e1a88..e0868f3 100644
Binary files a/testdata/snapshots/darwin/button-compact-dark.png and b/testdata/snapshots/darwin/button-compact-dark.png differ
diff --git a/testdata/snapshots/darwin/button-compact-light.png b/testdata/snapshots/darwin/button-compact-light.png
index 6eab1a0..8afc2ba 100644
Binary files a/testdata/snapshots/darwin/button-compact-light.png and b/testdata/snapshots/darwin/button-compact-light.png differ
diff --git a/testdata/snapshots/darwin/button-dark.png b/testdata/snapshots/darwin/button-dark.png
index df1f5e4..365330b 100644
Binary files a/testdata/snapshots/darwin/button-dark.png and b/testdata/snapshots/darwin/button-dark.png differ
diff --git a/testdata/snapshots/darwin/button-light.png b/testdata/snapshots/darwin/button-light.png
index c977763..dbf5a78 100644
Binary files a/testdata/snapshots/darwin/button-light.png and b/testdata/snapshots/darwin/button-light.png differ
diff --git a/testdata/snapshots/darwin/icon_button-dark.png b/testdata/snapshots/darwin/icon_button-dark.png
index ff1961b..c4e2187 100644
Binary files a/testdata/snapshots/darwin/icon_button-dark.png and b/testdata/snapshots/darwin/icon_button-dark.png differ
diff --git a/testdata/snapshots/darwin/icon_button-light.png b/testdata/snapshots/darwin/icon_button-light.png
index 6a4ca9b..79e0330 100644
Binary files a/testdata/snapshots/darwin/icon_button-light.png and b/testdata/snapshots/darwin/icon_button-light.png differ
diff --git a/testdata/snapshots/darwin/spinner-dark.png b/testdata/snapshots/darwin/spinner-dark.png
index 6c3d1a1..a34bd86 100644
Binary files a/testdata/snapshots/darwin/spinner-dark.png and b/testdata/snapshots/darwin/spinner-dark.png differ
diff --git a/testdata/snapshots/darwin/spinner-light.png b/testdata/snapshots/darwin/spinner-light.png
index be8951a..aed49d0 100644
Binary files a/testdata/snapshots/darwin/spinner-light.png and b/testdata/snapshots/darwin/spinner-light.png differ
diff --git a/text_area.go b/text_area.go
index e87274b..7dc8eac 100644
--- a/text_area.go
+++ b/text_area.go
@@ -55,7 +55,7 @@ func TextArea(c *ui.Context, value *string, opts TextAreaOptions) InputResult {
 	var r InputResult
 	look := &textInputLook{disabled: opts.Disabled, readOnly: opts.ReadOnly, err: errMsg, area: true}
 	r.Element, r.Input = textInputFrame(c, look, func(frame *ui.Element) *ui.Element {
-		in := textInputEditor(c, frame, value, opts.ReadOnly, true).Grow(1).Padding(d.Unit()*2, d.Unit()*3).
+		in := textInputEditor(c, frame, value, opts.ReadOnly || opts.Disabled, ui.TextAreaBase).Grow(1).Padding(d.Unit()*2, d.Unit()*3).
 			Placeholder(opts.Placeholder).Label(opts.Label)
 		if opts.MinHeight > 0 {
 			in.MinHeight(opts.MinHeight)
@@ -63,8 +63,18 @@ func TextArea(c *ui.Context, value *string, opts TextAreaOptions) InputResult {
 		if opts.MaxHeight > 0 {
 			in.MaxHeight(opts.MaxHeight)
 		}
-		r.changed = in.Changed() && !opts.ReadOnly
-		r.submitted = in.Shortcut(mods, key)
+		r.changed = in.Changed() && !opts.ReadOnly && !opts.Disabled
+		// Taken before the editor, which would make a plain Enter a newline.
+		submit := ui.Local(frame, "submit", func() bool { return false })
+		in.HandleInput(func(ev ui.InputEvent) bool {
+			if ev.Kind == ui.InputKeyDown && ev.Key == key && ev.Mods == mods {
+				*submit = true
+				return true
+			}
+			return false
+		})
+		r.submitted = *submit && !opts.Disabled
+		*submit = false
 		return in
 	}, count)
 	return r
@@ -82,7 +92,7 @@ func textAreaCount(c *ui.Context, n, max int) func() {
 		if over {
 			color = k.Danger
 		}
-		ui.Text(c, fmt.Sprintf("%d / %d", n, max)).TextColor(color).FontSize(theme.CaptionSize).
+		ui.Text(c, fmt.Sprintf("%d / %d", n, max)).TextColor(color).FontSize(FontSize(c, theme.CaptionSize)).
 			FontFeatures("tnum").Shrink(0).Label(fmt.Sprintf(msg(c, "text_area.count"), n, max))
 	}
 }
diff --git a/text_input.go b/text_input.go
index 07107cc..acacf0d 100644
--- a/text_input.go
+++ b/text_input.go
@@ -53,10 +53,10 @@ func TextInput(c *ui.Context, value *string, opts TextInputOptions) InputResult
 		if opts.Leading != nil {
 			opts.Leading()
 		}
-		in := textInputEditor(c, frame, value, opts.ReadOnly, false).Grow(1).MinWidth(Density(c).Unit() * 10).
+		in := textInputEditor(c, frame, value, opts.ReadOnly || opts.Disabled, ui.TextInputBase).Grow(1).MinWidth(Density(c).Unit() * 10).
 			Placeholder(opts.Placeholder).Label(opts.Label)
-		r.changed = in.Changed() && !opts.ReadOnly
-		r.submitted = in.Submitted()
+		r.changed = in.Changed() && !opts.ReadOnly && !opts.Disabled
+		r.submitted = in.Submitted() && !opts.Disabled
 		if opts.Clearable && *value != "" && !opts.ReadOnly && !opts.Disabled {
 			if textInputClear(c, in) {
 				*value = ""
@@ -95,6 +95,10 @@ func textInputFrame(c *ui.Context, look *textInputLook, build func(frame *ui.Ele
 		}
 		frame.Children(func() { in = build(frame) })
 		in.FocusRing(false)
+		if look.disabled && outer.FocusWithin() {
+			// A field disabled while focused gives the focus up.
+			outer.FocusRing(false).Focus()
+		}
 		if look.err != "" {
 			in.Error(look.err)
 		}
@@ -125,7 +129,7 @@ func textInputFrame(c *ui.Context, look *textInputLook, build func(frame *ui.Ele
 		}
 		ui.Row(c).Gap(d.Unit() * 2).AlignItems(ui.Start).Children(func() {
 			if look.err != "" {
-				ui.Text(c, look.err).TextColor(k.Danger).FontSize(theme.CaptionSize).Grow(1)
+				ui.Text(c, look.err).TextColor(k.Danger).FontSize(FontSize(c, theme.CaptionSize)).Grow(1)
 			} else {
 				ui.Spacer(c)
 			}
@@ -137,16 +141,12 @@ func textInputFrame(c *ui.Context, look *textInputLook, build func(frame *ui.Ele
 	return outer, in
 }
 
-// textInputEditor builds the MyGo editor; read-only edits are undone.
-func textInputEditor(c *ui.Context, frame *ui.Element, value *string, readOnly, area bool) *ui.Element {
-	base := ui.TextInputBase
-	if area {
-		base = ui.TextAreaBase
-	}
-	if !readOnly {
+// textInputEditor builds the MyGo editor; a locked one edits a copy, undone at once.
+func textInputEditor(c *ui.Context, frame *ui.Element, value *string, locked bool, base func(*ui.Context, *string) *ui.Element) *ui.Element {
+	if !locked {
 		return base(c, value)
 	}
-	shown := ui.Local(frame, "readonly", func() string { return *value })
+	shown := ui.Local(frame, "locked", func() string { return *value })
 	*shown = *value
 	in := base(c, shown)
 	*shown = *value