Add study selection and account registration flows

scripts/ui/question_player.gd

@@ -3,6 +3,9 @@ extends VBoxContainer
 const Style := preload("res://scripts/ui/ui_style.gd")
 const FEEDBACK_FADE_SECONDS := 0.45
 const CORRECT_ADVANCE_DELAY_SECONDS := 0.6
+const TEXT_SCALE_MIN := 0.85
+const TEXT_SCALE_MAX := 1.35
+const TEXT_SCALE_STEP := 0.1
 
 var main: Control
 var choice_buttons: Array[Button] = []
@@ -25,18 +28,24 @@ var stem_plain_text := ""
 var highlight_drag_started_in_stem := false
 var timer_color_state := ""
 var pending_correct_advance := false
+var question_text_scale := 1.0
+var presented_choices: Array = []
 
 var progress_label: Label
 var timer_label: Label
+var player_stats_label: Label
 var stem_label: RichTextLabel
 var lead_label: Label
 var explanation_label: RichTextLabel
 var question_elo_label: Label
 var next_button: Button
 var skip_button: Button
+var text_smaller_button: Button
+var text_larger_button: Button
 var labs_button: Button
 var flag_button: Button
 var report_button: Button
+var question_toolbar: HBoxContainer
 var nav_palette: HBoxContainer
 var question_content: VBoxContainer
 var media_container: VBoxContainer
@@ -61,15 +70,21 @@ func _ready() -> void:
 		QuestionBankService.question_rating_updated.connect(_on_question_rating_updated)
 	if not QuestionBankService.question_skipped.is_connected(_on_question_skipped):
 		QuestionBankService.question_skipped.connect(_on_question_skipped)
+	if not ProfileService.profile_changed.is_connected(_refresh_player_stats):
+		ProfileService.profile_changed.connect(_refresh_player_stats)
+	if not QuestionBankService.ratings_changed.is_connected(_refresh_player_stats):
+		QuestionBankService.ratings_changed.connect(_refresh_player_stats)
+	if not AuthState.auth_changed.is_connected(_refresh_player_stats):
+		AuthState.auth_changed.connect(_refresh_player_stats)
 
 	var top := HBoxContainer.new()
 	top.add_theme_constant_override("separation", 12)
 	progress_label = Label.new()
-	Style.set_label(progress_label, 18, Style.CYAN)
+	_set_scaled_label(progress_label, 18, Style.CYAN)
 	progress_label.size_flags_horizontal = Control.SIZE_EXPAND_FILL
 	top.add_child(progress_label)
 	timer_label = Label.new()
-	Style.set_label(timer_label, 18, Style.AMBER)
+	_set_scaled_label(timer_label, 18, Style.AMBER)
 	timer_label.visible = false
 	timer_label.size_flags_horizontal = Control.SIZE_EXPAND_FILL
 	timer_label.horizontal_alignment = HORIZONTAL_ALIGNMENT_RIGHT
@@ -79,9 +94,30 @@ func _ready() -> void:
 	toolbar_spacer.size_flags_horizontal = Control.SIZE_EXPAND_FILL
 	top.add_child(toolbar_spacer)
 
-	var toolbar := HBoxContainer.new()
-	toolbar.add_theme_constant_override("separation", 8)
-	toolbar.alignment = BoxContainer.ALIGNMENT_END
+	player_stats_label = Label.new()
+	player_stats_label.horizontal_alignment = HORIZONTAL_ALIGNMENT_RIGHT
+	_set_scaled_label(player_stats_label, 15, Style.MUTED)
+	top.add_child(player_stats_label)
+
+	question_toolbar = HBoxContainer.new()
+	question_toolbar.add_theme_constant_override("separation", 8)
+	question_toolbar.alignment = BoxContainer.ALIGNMENT_END
+
+	text_smaller_button = Button.new()
+	text_smaller_button.text = "A-"
+	text_smaller_button.tooltip_text = "Decrease text size"
+	text_smaller_button.custom_minimum_size = Vector2(44, 44)
+	Style.style_chip(text_smaller_button, Style.CYAN)
+	text_smaller_button.pressed.connect(func(): _adjust_question_text_scale(-TEXT_SCALE_STEP))
+	question_toolbar.add_child(text_smaller_button)
+
+	text_larger_button = Button.new()
+	text_larger_button.text = "A+"
+	text_larger_button.tooltip_text = "Increase text size"
+	text_larger_button.custom_minimum_size = Vector2(44, 44)
+	Style.style_chip(text_larger_button, Style.CYAN)
+	text_larger_button.pressed.connect(func(): _adjust_question_text_scale(TEXT_SCALE_STEP))
+	question_toolbar.add_child(text_larger_button)
 
 	labs_button = Button.new()
 	labs_button.tooltip_text = "Review lab results"
@@ -89,7 +125,7 @@ func _ready() -> void:
 	labs_button.custom_minimum_size = Vector2(44, 44)
 	Style.style_chip(labs_button, Style.LIME)
 	labs_button.pressed.connect(_show_labs_modal)
-	toolbar.add_child(labs_button)
+	question_toolbar.add_child(labs_button)
 
 	var clear_highlight_button := Button.new()
 	clear_highlight_button.tooltip_text = "Clear highlights"
@@ -97,7 +133,7 @@ func _ready() -> void:
 	clear_highlight_button.custom_minimum_size = Vector2(44, 44)
 	Style.style_chip(clear_highlight_button, Style.CYAN)
 	clear_highlight_button.pressed.connect(_clear_current_highlights)
-	toolbar.add_child(clear_highlight_button)
+	question_toolbar.add_child(clear_highlight_button)
 
 	flag_button = Button.new()
 	flag_button.toggle_mode = true
@@ -109,16 +145,16 @@ func _ready() -> void:
 		flagged = value
 		_refresh_toolbar_state()
 	)
-	toolbar.add_child(flag_button)
+	question_toolbar.add_child(flag_button)
 
 	report_button = Button.new()
 	report_button.tooltip_text = "Report question"
 	report_button.icon = _make_report_icon()
 	report_button.custom_minimum_size = Vector2(44, 44)
 	report_button.pressed.connect(_toggle_report_current_question)
-	toolbar.add_child(report_button)
+	question_toolbar.add_child(report_button)
 
-	top.add_child(toolbar)
+	top.add_child(question_toolbar)
 	add_child(top)
 
 	nav_palette = HBoxContainer.new()
@@ -151,6 +187,7 @@ func _ready() -> void:
 	stem_label.selection_enabled = true
 	stem_label.scroll_active = false
 	stem_label.custom_minimum_size = Vector2(0, 96)
+	_set_scaled_rich_text(stem_label, 18)
 	question_content.add_child(stem_label)
 
 	media_container = VBoxContainer.new()
@@ -159,15 +196,20 @@ func _ready() -> void:
 	media_container.add_theme_constant_override("separation", 10)
 	question_content.add_child(media_container)
 
+	var lead_margin := MarginContainer.new()
+	lead_margin.add_theme_constant_override("margin_top", 12)
+	lead_margin.size_flags_horizontal = Control.SIZE_EXPAND_FILL
+	question_content.add_child(lead_margin)
+
 	lead_label = Label.new()
 	lead_label.autowrap_mode = TextServer.AUTOWRAP_WORD_SMART
-	Style.set_label(lead_label, 21, Style.TEXT)
-	question_content.add_child(lead_label)
+	_set_scaled_label(lead_label, 21, Style.TEXT)
+	lead_margin.add_child(lead_label)
 
 	question_elo_label = Label.new()
 	question_elo_label.visible = false
 	question_elo_label.horizontal_alignment = HORIZONTAL_ALIGNMENT_RIGHT
-	Style.set_label(question_elo_label, 16, Style.AMBER)
+	_set_scaled_label(question_elo_label, 16, Style.AMBER)
 	question_content.add_child(question_elo_label)
 
 	for index in range(5):
@@ -175,6 +217,7 @@ func _ready() -> void:
 		button.custom_minimum_size = Vector2(0, 64)
 		button.alignment = HORIZONTAL_ALIGNMENT_LEFT
 		Style.style_answer_button(button)
+		_set_scaled_button_font(button, 17)
 		button.pressed.connect(func(i := index): _select_choice(i))
 		button.gui_input.connect(func(event: InputEvent, i := index): _choice_gui_input(event, i))
 		choice_buttons.append(button)
@@ -192,7 +235,7 @@ func _ready() -> void:
 		percent_label.offset_top = 8
 		percent_label.offset_right = -18
 		percent_label.offset_bottom = 40
-		Style.set_label(percent_label, 18, Style.TEXT)
+		_set_scaled_label(percent_label, 18, Style.TEXT)
 		button.add_child(percent_label)
 		choice_percent_labels.append(percent_label)
 
@@ -207,7 +250,7 @@ func _ready() -> void:
 		top_label.offset_top = 10
 		top_label.offset_right = -96
 		top_label.offset_bottom = -252
-		Style.set_label(top_label, 16, Style.RED)
+		_set_scaled_label(top_label, 16, Style.RED)
 		button.add_child(top_label)
 		choice_top_labels.append(top_label)
 
@@ -236,6 +279,7 @@ func _ready() -> void:
 	explanation_label.scroll_active = false
 	explanation_label.custom_minimum_size = Vector2(0, 150)
 	explanation_label.visible = false
+	_set_scaled_rich_text(explanation_label, 17)
 	question_content.add_child(explanation_label)
 
 	var actions := HBoxContainer.new()
@@ -311,6 +355,8 @@ func _input(event: InputEvent) -> void:
 	elif highlight_drag_started_in_stem:
 		highlight_drag_started_in_stem = false
 		call_deferred("_commit_current_text_selection")
+	elif _should_clear_selection_from_click(mouse_event):
+		_clear_selected_choice()
 
 
 func _load_question() -> void:
@@ -328,13 +374,13 @@ func _load_question() -> void:
 	question_elo_label.visible = false
 	question_elo_label.text = ""
 	next_button.text = "Submit"
-	next_button.disabled = false
+	next_button.disabled = true
 	skip_button.disabled = false
 	skip_button.visible = BlockSessionService.session_kind == "core"
 
 	var question := BlockSessionService.get_current_question()
 	if question.is_empty():
-		main.show_screen("dashboard")
+		main.show_screen("selection", "step3")
 		return
 	progress_label.visible = BlockSessionService.session_kind != "core"
 	progress_label.text = "" if BlockSessionService.session_kind == "core" else "Question %s" % BlockSessionService.get_progress_text()
@@ -348,7 +394,9 @@ func _load_question() -> void:
 	lead_label.text = question.get("lead_in", "")
 	_refresh_labs_button()
 
-	var choices: Array = question.get("choices", [])
+	presented_choices = question.get("choices", []).duplicate(true)
+	presented_choices.shuffle()
+	var choices := presented_choices
 	for index in range(choice_buttons.size()):
 		var button := choice_buttons[index]
 		button.visible = index < choices.size()
@@ -357,6 +405,9 @@ func _load_question() -> void:
 			var choice: Dictionary = choices[index]
 			_set_choice_button_text(index, choice)
 			button.modulate = Color.WHITE
+			_style_choice_button_for_state(index, str(choice.get("id", "")))
+
+	_refresh_submit_state()
 
 	var saved_answer = BlockSessionService.get_answer_for_index(BlockSessionService.current_index)
 	if saved_answer != null:
@@ -372,28 +423,78 @@ func _load_question() -> void:
 		else:
 			_apply_saved_choice_state()
 			next_button.text = "Next"
+		next_button.disabled = false
 		_update_question_elo_label(true)
 
 	_refresh_nav_palette()
 	_refresh_toolbar_state()
+	_refresh_player_stats()
 
 
 func _select_choice(index: int) -> void:
 	if pending_correct_advance or followup_required:
 		return
-	var question := BlockSessionService.get_current_question()
-	var choices: Array = question.get("choices", [])
+	var choices := _get_presented_choices()
 	if index >= choices.size() or (BlockSessionService.mode == "Tutor" and not current_answer.is_empty()):
 		return
 	if locked_wrong_choice_ids.has(str(choices[index].get("id", ""))):
 		return
-	selected_choice = str(choices[index].get("id", ""))
+	var choice_id := str(choices[index].get("id", ""))
+	selected_choice = "" if selected_choice == choice_id else choice_id
 	if BlockSessionService.mode == "Timed":
 		current_answer = {}
 		next_button.text = "Submit"
 	_apply_saved_choice_state()
 
 
+func _clear_selected_choice() -> void:
+	if selected_choice == "":
+		return
+	selected_choice = ""
+	if BlockSessionService.mode == "Timed":
+		current_answer = {}
+		next_button.text = "Submit"
+	_apply_saved_choice_state()
+
+
+func _should_clear_selection_from_click(mouse_event: InputEventMouseButton) -> bool:
+	if selected_choice == "" or followup_required or not current_answer.is_empty():
+		return false
+	if mouse_event.pressed or mouse_event.button_index != MOUSE_BUTTON_LEFT:
+		return false
+	var pointer_position := mouse_event.global_position
+	if stem_label.get_global_rect().has_point(pointer_position):
+		return false
+	if lead_label.get_global_rect().has_point(pointer_position):
+		return false
+	if explanation_label.visible and explanation_label.get_global_rect().has_point(pointer_position):
+		return false
+	if labs_overlay != null and labs_overlay.visible:
+		return false
+	if skip_button != null and skip_button.get_global_rect().has_point(pointer_position):
+		return false
+	if next_button != null and next_button.get_global_rect().has_point(pointer_position):
+		return false
+	if question_toolbar != null and question_toolbar.get_global_rect().has_point(pointer_position):
+		return false
+	if labs_button != null and labs_button.visible and labs_button.get_global_rect().has_point(pointer_position):
+		return false
+	if flag_button != null and flag_button.get_global_rect().has_point(pointer_position):
+		return false
+	if report_button != null and report_button.get_global_rect().has_point(pointer_position):
+		return false
+	for button in choice_buttons:
+		if button.visible and button.get_global_rect().has_point(pointer_position):
+			return false
+	for panel in choice_followup_panels:
+		if panel.visible and panel.get_global_rect().has_point(pointer_position):
+			return false
+	for child in media_container.get_children():
+		if child is Control and child.get_global_rect().has_point(pointer_position):
+			return false
+	return true
+
+
 func _skip_current_question() -> void:
 	if pending_correct_advance or not current_answer.is_empty() or BlockSessionService.session_kind != "core":
 		return
@@ -422,8 +523,7 @@ func _choice_gui_input(event: InputEvent, index: int) -> void:
 	if not current_answer.is_empty():
 		return
 
-	var question := BlockSessionService.get_current_question()
-	var choices: Array = question.get("choices", [])
+	var choices := _get_presented_choices()
 	if index >= choices.size():
 		return
 
@@ -442,8 +542,7 @@ func _choice_gui_input(event: InputEvent, index: int) -> void:
 func _toggle_eliminate_selected() -> void:
 	if pending_correct_advance or followup_required or selected_choice == "" or not current_answer.is_empty():
 		return
-	var question := BlockSessionService.get_current_question()
-	var choices: Array = question.get("choices", [])
+	var choices := _get_presented_choices()
 	for index in range(choices.size()):
 		if str(choices[index].get("id", "")) == selected_choice:
 			if eliminated.has(selected_choice):
@@ -499,8 +598,9 @@ func _show_explanation() -> void:
 	var correct_id := str(question.get("correct_choice_id", ""))
 	for button in choice_buttons:
 		button.disabled = true
-	for index in range(question.get("choices", []).size()):
-		var choice: Dictionary = question["choices"][index]
+	var choices := _get_presented_choices()
+	for index in range(choices.size()):
+		var choice: Dictionary = choices[index]
 		var id := str(choice.get("id", ""))
 		_set_choice_button_text(index, choice)
 		if id == correct_id:
@@ -525,7 +625,7 @@ func _advance_or_finish() -> void:
 func _finish() -> void:
 	if BlockSessionService.session_kind == "core":
 		BlockSessionService.finish_block()
-		main.show_screen("dashboard")
+		main.show_screen("selection", "step3")
 		return
 	var results := BlockSessionService.finish_block()
 	main.show_screen("review", results)
@@ -534,7 +634,7 @@ func _finish() -> void:
 func _exit_run() -> void:
 	BlockSessionService.resume_current_question_timer()
 	BlockSessionService.finish_block()
-	main.show_screen("dashboard")
+	main.show_screen("selection", "step3")
 
 
 func _update_timer_bar() -> void:
@@ -690,6 +790,61 @@ func _refresh_toolbar_state() -> void:
 		Style.style_chip(report_button, Style.RED if reported_question_ids.has(question_id) else Style.CYAN)
 
 
+func _refresh_player_stats() -> void:
+	if player_stats_label == null:
+		return
+	var display_name := AuthState.username if AuthState.username != "" else AuthState.role
+	player_stats_label.text = "Rating: %d  |  %s" % [
+		QuestionBankService.overall_elo,
+		display_name
+	]
+
+
+func _adjust_question_text_scale(delta: float) -> void:
+	var next_scale: float = clamp(question_text_scale + delta, TEXT_SCALE_MIN, TEXT_SCALE_MAX)
+	if is_equal_approx(next_scale, question_text_scale):
+		return
+	question_text_scale = next_scale
+	_refresh_scaled_fonts(self)
+	_render_stem()
+	_apply_saved_choice_state()
+
+
+func _set_scaled_label(label: Label, base_size: int, color: Color = Style.TEXT) -> void:
+	label.set_meta("question_base_font_size", base_size)
+	label.add_theme_color_override("font_color", color)
+	label.add_theme_font_size_override("font_size", _scaled_font_size(base_size))
+
+
+func _set_scaled_button_font(button: Button, base_size: int) -> void:
+	button.set_meta("question_base_font_size", base_size)
+	button.add_theme_font_size_override("font_size", _scaled_font_size(base_size))
+
+
+func _set_scaled_rich_text(label: RichTextLabel, base_size: int) -> void:
+	label.set_meta("question_base_font_size", base_size)
+	label.add_theme_font_size_override("normal_font_size", _scaled_font_size(base_size))
+	label.add_theme_font_size_override("bold_font_size", _scaled_font_size(base_size))
+
+
+func _refresh_scaled_fonts(node: Node) -> void:
+	if node.has_meta("question_base_font_size"):
+		var base_size := int(node.get_meta("question_base_font_size"))
+		if node is Label:
+			node.add_theme_font_size_override("font_size", _scaled_font_size(base_size))
+		elif node is Button:
+			node.add_theme_font_size_override("font_size", _scaled_font_size(base_size))
+		elif node is RichTextLabel:
+			node.add_theme_font_size_override("normal_font_size", _scaled_font_size(base_size))
+			node.add_theme_font_size_override("bold_font_size", _scaled_font_size(base_size))
+	for child in node.get_children():
+		_refresh_scaled_fonts(child)
+
+
+func _scaled_font_size(base_size: int) -> int:
+	return int(round(float(base_size) * question_text_scale))
+
+
 func _refresh_labs_button() -> void:
 	if labs_button == null:
 		return
@@ -728,7 +883,7 @@ func _load_question_media(question: Dictionary) -> void:
 		var status := Label.new()
 		status.text = "Loading image..."
 		status.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
-		Style.set_label(status, 15, Style.MUTED)
+		_set_scaled_label(status, 15, Style.MUTED)
 		image_box.add_child(status)
 
 		var texture_rect := TextureRect.new()
@@ -847,7 +1002,7 @@ func _build_labs_modal() -> void:
 	var title := Label.new()
 	title.text = "Lab Results"
 	title.size_flags_horizontal = Control.SIZE_EXPAND_FILL
-	Style.set_label(title, 26, Style.TEXT)
+	_set_scaled_label(title, 26, Style.TEXT)
 	header.add_child(title)
 
 	var close_button := Button.new()
@@ -926,7 +1081,7 @@ func _add_lab_table_label(parent: GridContainer, text: String, color: Color, is_
 	label.text = text if text.strip_edges() != "" else "-"
 	label.autowrap_mode = TextServer.AUTOWRAP_WORD_SMART
 	label.size_flags_horizontal = Control.SIZE_EXPAND_FILL
-	Style.set_label(label, 16 if not is_header else 17, color)
+	_set_scaled_label(label, 16 if not is_header else 17, color)
 	parent.add_child(label)
 
 
@@ -983,8 +1138,7 @@ func _subtract_highlight_range(highlights: Array, start: int, end: int) -> bool:
 
 
 func _apply_saved_choice_state() -> void:
-	var question := BlockSessionService.get_current_question()
-	var choices: Array = question.get("choices", [])
+	var choices := _get_presented_choices()
 	for index in range(choices.size()):
 		var id := str(choices[index].get("id", ""))
 		var has_followup_panel := index < choice_followup_panels.size() and choice_followup_panels[index].visible
@@ -1008,10 +1162,25 @@ func _apply_saved_choice_state() -> void:
 			var id := str(choices[index].get("id", ""))
 			choice_buttons[index].disabled = id != active_followup_choice_id
 
+	_refresh_submit_state()
+
+
+func _refresh_submit_state() -> void:
+	if next_button == null:
+		return
+	if pending_correct_advance or followup_required:
+		next_button.disabled = true
+		return
+	if not current_answer.is_empty():
+		next_button.disabled = false
+		return
+	next_button.disabled = selected_choice == ""
+
 
 func _set_choice_button_text(index: int, choice: Dictionary) -> void:
 	var choice_id := str(choice.get("id", ""))
 	var choice_text := str(choice.get("text", ""))
+	var display_label := _display_label_for_index(index)
 	var has_visible_followup := index < choice_followup_panels.size() and choice_followup_panels[index].visible
 	choice_buttons[index].custom_minimum_size = _choice_row_size(index, choice_id, has_visible_followup)
 	_set_choice_percent_label(index, "")
@@ -1021,21 +1190,21 @@ func _set_choice_button_text(index: int, choice: Dictionary) -> void:
 		if percentage >= 0:
 			_set_choice_percent_label(index, "%d%%" % percentage)
 		if has_visible_followup:
-			var wrong_text := "%s. %s" % [choice_id, choice_text]
+			var wrong_text := "%s. %s" % [display_label, choice_text]
 			choice_buttons[index].text = ""
 			_set_choice_top_label(index, wrong_text)
 		else:
-			var wrong_text := "%s. %s" % [choice_id, _strike_text(choice_text)]
+			var wrong_text := "%s. %s" % [display_label, _strike_text(choice_text)]
 			choice_buttons[index].text = wrong_text
 	elif _should_show_correct_choice_percentage(choice_id):
 		var correct_percentage := _get_choice_selection_percentage(choice_id)
 		if correct_percentage >= 0:
 			_set_choice_percent_label(index, "%d%%" % correct_percentage)
-		choice_buttons[index].text = "%s. %s" % [choice_id, choice_text]
+		choice_buttons[index].text = "%s. %s" % [display_label, choice_text]
 	elif eliminated.has(choice_id):
-		choice_buttons[index].text = "%s. [eliminated] %s" % [choice_id, _strike_text(choice_text)]
+		choice_buttons[index].text = "%s. [eliminated] %s" % [display_label, _strike_text(choice_text)]
 	else:
-		choice_buttons[index].text = "%s. %s" % [choice_id, choice_text]
+		choice_buttons[index].text = "%s. %s" % [display_label, choice_text]
 
 
 func _style_choice_button_for_state(index: int, choice_id: String) -> void:
@@ -1095,7 +1264,7 @@ func _should_show_correct_choice_percentage(choice_id: String) -> bool:
 func _apply_correct_answer_preview() -> void:
 	var question := BlockSessionService.get_current_question()
 	var correct_id := str(question.get("correct_choice_id", ""))
-	var choices: Array = question.get("choices", [])
+	var choices := _get_presented_choices()
 	for index in range(choices.size()):
 		if str(choices[index].get("id", "")) == correct_id:
 			choice_buttons[index].modulate = Color(0.54, 1.0, 0.58)
@@ -1127,11 +1296,14 @@ func _build_followup_panel(index: int, choice_id: String) -> void:
 	var panel := choice_followup_panels[index]
 	var content := choice_followup_contents[index]
 	var followup := _get_followup_for_choice(choice_id)
+	var followup_choices: Array = followup.get("choices", []).duplicate(true)
+	followup_choices.shuffle()
+	followup["choices"] = followup_choices
 	followup_states[choice_id] = {
 		"choice_id": choice_id,
 		"choice_text": _choice_text_for_id(choice_id),
 		"prompt": str(followup.get("prompt", "")),
-		"choices": followup.get("choices", []),
+		"choices": followup_choices,
 		"correct_choice_id": str(followup.get("correct_choice_id", "")),
 		"teaching_point": str(followup.get("teaching_point", "")),
 		"selected_option_id": "",
@@ -1145,19 +1317,21 @@ func _build_followup_panel(index: int, choice_id: String) -> void:
 	var prompt := Label.new()
 	prompt.text = str(followup.get("prompt", "What finding in the stem makes this answer less appropriate?"))
 	prompt.autowrap_mode = TextServer.AUTOWRAP_WORD_SMART
-	Style.set_label(prompt, 14, Style.TEXT)
+	_set_scaled_label(prompt, 14, Style.TEXT)
 	content.add_child(prompt)
 
-	var choices: Array = followup.get("choices", [])
+	var choices: Array = followup_choices
 	if bool(followup.get("has_authored_choices", false)):
-		for option in choices:
+		for option_index in range(choices.size()):
+			var option = choices[option_index]
 			if typeof(option) != TYPE_DICTIONARY:
 				continue
 			var option_button := Button.new()
-			option_button.text = "%s. %s" % [str(option.get("id", "")), str(option.get("text", ""))]
+			option_button.text = "%s. %s" % [_display_label_for_index(option_index), str(option.get("text", ""))]
 			option_button.alignment = HORIZONTAL_ALIGNMENT_LEFT
 			option_button.custom_minimum_size = Vector2(0, 32)
 			Style.style_chip(option_button, Style.CYAN)
+			_set_scaled_button_font(option_button, 15)
 			option_button.set_meta("option_id", str(option.get("id", "")))
 			option_button.pressed.connect(func(option_id := str(option.get("id", "")), selected_button := option_button, followup_data := followup):
 				_answer_followup(option_id, selected_button, followup_data)
@@ -1173,6 +1347,7 @@ func _build_followup_panel(index: int, choice_id: String) -> void:
 		continue_button.text = "Continue"
 		continue_button.custom_minimum_size = Vector2(130, 32)
 		Style.style_chip(continue_button, Style.CYAN)
+		_set_scaled_button_font(continue_button, 15)
 		continue_button.pressed.connect(func(followup_data := followup): _resolve_followup(followup_data, null, false, false))
 		action_row.add_child(continue_button)
 
@@ -1209,7 +1384,7 @@ func _resolve_followup(followup: Dictionary, selected_button: Button, style_sele
 		var teaching := Label.new()
 		teaching.text = str(followup.get("teaching_point", "Review the relevant stem finding before choosing again."))
 		teaching.autowrap_mode = TextServer.AUTOWRAP_WORD_SMART
-		Style.set_label(teaching, 14, Style.AMBER)
+		_set_scaled_label(teaching, 14, Style.AMBER)
 		choice_followup_contents[index].add_child(teaching)
 
 	if followup_states.has(resolved_choice_id):
@@ -1280,10 +1455,11 @@ func _render_followup_state(choice_id: String) -> void:
 func _build_collapsed_followup(index: int, state: Dictionary) -> void:
 	var content := choice_followup_contents[index]
 	var summary := Button.new()
-	summary.text = "Review: %s. %s" % [str(state.get("choice_id", "")), str(state.get("choice_text", ""))]
+	summary.text = "Review: %s. %s" % [_display_label_for_choice_id(str(state.get("choice_id", ""))), str(state.get("choice_text", ""))]
 	summary.alignment = HORIZONTAL_ALIGNMENT_LEFT
 	summary.custom_minimum_size = Vector2(0, 40)
 	Style.style_chip(summary, Style.AMBER)
+	_set_scaled_button_font(summary, 15)
 	summary.gui_input.connect(func(_event: InputEvent): _mark_review_input_handled())
 	summary.pressed.connect(func(choice_id := str(state.get("choice_id", ""))): _toggle_followup_state(choice_id))
 	content.add_child(summary)
@@ -1292,10 +1468,11 @@ func _build_collapsed_followup(index: int, state: Dictionary) -> void:
 func _build_readonly_followup(index: int, state: Dictionary) -> void:
 	var content := choice_followup_contents[index]
 	var summary := Button.new()
-	summary.text = "Hide review: %s. %s" % [str(state.get("choice_id", "")), str(state.get("choice_text", ""))]
+	summary.text = "Hide review: %s. %s" % [_display_label_for_choice_id(str(state.get("choice_id", ""))), str(state.get("choice_text", ""))]
 	summary.alignment = HORIZONTAL_ALIGNMENT_LEFT
 	summary.custom_minimum_size = Vector2(0, 36)
 	Style.style_chip(summary, Style.AMBER)
+	_set_scaled_button_font(summary, 15)
 	summary.gui_input.connect(func(_event: InputEvent): _mark_review_input_handled())
 	summary.pressed.connect(func(choice_id := str(state.get("choice_id", ""))): _toggle_followup_state(choice_id))
 	content.add_child(summary)
@@ -1303,20 +1480,20 @@ func _build_readonly_followup(index: int, state: Dictionary) -> void:
 	var prompt := Label.new()
 	prompt.text = str(state.get("prompt", ""))
 	prompt.autowrap_mode = TextServer.AUTOWRAP_WORD_SMART
-	Style.set_label(prompt, 14, Style.TEXT)
+	_set_scaled_label(prompt, 14, Style.TEXT)
 	content.add_child(prompt)
 
 	var selected := Label.new()
 	var selected_text := str(state.get("selected_option_text", ""))
 	selected.text = "Your follow-up answer: %s" % selected_text if selected_text != "" else "Follow-up reviewed."
 	selected.autowrap_mode = TextServer.AUTOWRAP_WORD_SMART
-	Style.set_label(selected, 14, Style.LIME if bool(state.get("was_correct", false)) else Style.RED)
+	_set_scaled_label(selected, 14, Style.LIME if bool(state.get("was_correct", false)) else Style.RED)
 	content.add_child(selected)
 
 	var teaching := Label.new()
 	teaching.text = str(state.get("teaching_point", ""))
 	teaching.autowrap_mode = TextServer.AUTOWRAP_WORD_SMART
-	Style.set_label(teaching, 14, Style.AMBER)
+	_set_scaled_label(teaching, 14, Style.AMBER)
 	content.add_child(teaching)
 
 
@@ -1361,9 +1538,23 @@ func _get_followup_for_choice(choice_id: String) -> Dictionary:
 	}
 
 
+func _get_presented_choices() -> Array:
+	if not presented_choices.is_empty():
+		return presented_choices
+	return BlockSessionService.get_current_question().get("choices", [])
+
+
+func _display_label_for_index(index: int) -> String:
+	return String.chr(65 + index)
+
+
+func _display_label_for_choice_id(choice_id: String) -> String:
+	var index := _choice_index_for_id(choice_id)
+	return _display_label_for_index(index) if index >= 0 else choice_id
+
+
 func _choice_index_for_id(choice_id: String) -> int:
-	var question := BlockSessionService.get_current_question()
-	var choices: Array = question.get("choices", [])
+	var choices := _get_presented_choices()
 	for index in range(choices.size()):
 		if str(choices[index].get("id", "")) == choice_id:
 			return index
@@ -1371,8 +1562,7 @@ func _choice_index_for_id(choice_id: String) -> int:
 
 
 func _choice_text_for_id(choice_id: String) -> String:
-	var question := BlockSessionService.get_current_question()
-	var choices: Array = question.get("choices", [])
+	var choices := _get_presented_choices()
 	for choice in choices:
 		if typeof(choice) == TYPE_DICTIONARY and str(choice.get("id", "")) == choice_id:
 			return str(choice.get("text", ""))