Add multi-select batch fish selling

economy/fish_sale_result.gd

@@ -8,12 +8,15 @@ enum Status {
 	INVALID_VALUE,
 	INVALID_BUYER,
 	INVALID_OFFER,
+	INVALID_SELECTION,
 	TRANSACTION_FAILED,
 }
 
 var success: bool = false
 var status: Status = Status.TRANSACTION_FAILED
 var catch_id: StringName
+var catch_ids: Array[StringName] = []
+var fish_count: int = 0
 var fish_name: String = ""
 var buyer_id: StringName
 var buyer_display_name: String = ""
@@ -32,14 +35,16 @@ func get_message() -> String:
 		Status.SUCCESS:
 			return sale_message
 		Status.NOT_FOUND:
-			return "Fish no longer exists."
+			return "fish no longer exists."
 		Status.FAVORITED:
-			return "Favorited fish cannot be sold."
+			return "favorited fish cannot be sold."
 		Status.INVALID_VALUE:
-			return "Invalid sale value."
+			return "invalid sale value."
 		Status.INVALID_BUYER:
-			return "Buyer is unavailable."
+			return "buyer is unavailable."
 		Status.INVALID_OFFER:
-			return "Invalid buyer offer."
+			return "invalid buyer offer."
+		Status.INVALID_SELECTION:
+			return "the fish selection is invalid."
 		_:
-			return "Transaction failed."
+			return "transaction failed."

economy/fish_sale_service.gd

@@ -25,24 +25,53 @@ func can_sell(
 	catch_id: StringName,
 	buyer: FishBuyerProfileType,
 ) -> bool:
-	return _validate_sale(catch_id, buyer).is_success()
+	return preview_batch([catch_id], buyer).is_success()
+
+
+func can_sell_batch(
+	catch_ids: Array[StringName],
+	buyer: FishBuyerProfileType,
+) -> bool:
+	return preview_batch(catch_ids, buyer).is_success()
+
+
+func preview_batch(
+	catch_ids: Array[StringName],
+	buyer: FishBuyerProfileType,
+) -> FishSaleResultType:
+	return _validate_batch(catch_ids, buyer)
 
 
 func sell(
 	catch_id: StringName,
 	buyer: FishBuyerProfileType,
 ) -> FishSaleResultType:
-	var result: FishSaleResultType = _validate_sale(catch_id, buyer)
+	return sell_batch([catch_id], buyer)
+
+
+func sell_batch(
+	catch_ids: Array[StringName],
+	buyer: FishBuyerProfileType,
+) -> FishSaleResultType:
+	var result: FishSaleResultType = _validate_batch(catch_ids, buyer)
 	if not result.is_success():
 		return result
 
-	var removed_catch: FishCatchType = _inventory.remove_catch_by_id(catch_id)
-	if removed_catch == null:
+	var inventory_snapshot: Array[FishCatchType] = _inventory.get_all_catches()
+	var next_sequence_snapshot: int = _inventory.get_next_catch_sequence()
+	var removed_catches: Array[FishCatchType] = (
+		_inventory.remove_catches_by_ids(result.catch_ids)
+	)
+	if removed_catches.size() != result.catch_ids.size():
 		result.success = false
-		result.status = FishSaleResultType.Status.NOT_FOUND
+		result.status = FishSaleResultType.Status.TRANSACTION_FAILED
 		return result
 	if not _wallet.credit(result.payout):
-		_inventory.add_catch(removed_catch)
+		if not _inventory.replace_all_catches(
+			inventory_snapshot,
+			next_sequence_snapshot
+		):
+			push_error("Unable to roll back a failed fish batch sale.")
 		result.success = false
 		result.status = FishSaleResultType.Status.TRANSACTION_FAILED
 		return result
@@ -50,27 +79,22 @@ func sell(
 	return result
 
 
-func _validate_sale(
-	catch_id: StringName,
+func _validate_batch(
+	catch_ids: Array[StringName],
 	buyer: FishBuyerProfileType,
 ) -> FishSaleResultType:
 	var result := FishSaleResultType.new()
-	result.catch_id = catch_id
-	if (
-		catch_id.is_empty()
-		or _inventory == null
-		or _wallet == null
-	):
-		result.status = FishSaleResultType.Status.NOT_FOUND
+	result.catch_ids = catch_ids.duplicate()
+	result.fish_count = catch_ids.size()
+	if _inventory == null or _wallet == null:
+		result.status = FishSaleResultType.Status.TRANSACTION_FAILED
+		return result
+	if catch_ids.is_empty():
+		result.status = FishSaleResultType.Status.INVALID_SELECTION
 		return result
 	if buyer == null or not buyer.is_valid():
 		result.status = FishSaleResultType.Status.INVALID_BUYER
 		return result
-	var fish_catch: FishCatchType = _inventory.get_catch_by_id(catch_id)
-	if fish_catch == null:
-		result.status = FishSaleResultType.Status.NOT_FOUND
-		return result
-	result.fish_name = fish_catch.fish.display_name
 	result.buyer_id = buyer.id
 	result.buyer_display_name = buyer.display_name
 	result.buyer_animal_name = (
@@ -78,21 +102,55 @@ func _validate_sale(
 		if not buyer.animal_name_plural.is_empty()
 		else buyer.display_name
 	)
-	result.base_value = fish_catch.sale_value
-	result.payout = buyer.get_offer(result.base_value)
-	if fish_catch.is_favorited:
+	var seen_ids: Dictionary[StringName, bool] = {}
+	var contains_favorite: bool = false
+	const MAX_SAFE_TOTAL: int = 9223372036854775807
+	for catch_id: StringName in catch_ids:
+		if catch_id.is_empty() or seen_ids.has(catch_id):
+			result.status = FishSaleResultType.Status.INVALID_SELECTION
+			return result
+		seen_ids[catch_id] = true
+		var fish_catch: FishCatchType = _inventory.get_catch_by_id(catch_id)
+		if fish_catch == null:
+			result.status = FishSaleResultType.Status.NOT_FOUND
+			return result
+		if fish_catch.is_favorited:
+			contains_favorite = true
+		if fish_catch.sale_value < 0:
+			result.status = FishSaleResultType.Status.INVALID_VALUE
+			return result
+		var offer: int = buyer.get_offer(fish_catch.sale_value)
+		if offer < 0:
+			result.status = FishSaleResultType.Status.INVALID_OFFER
+			return result
+		if (
+			result.base_value > MAX_SAFE_TOTAL - fish_catch.sale_value
+			or result.payout > MAX_SAFE_TOTAL - offer
+		):
+			result.status = FishSaleResultType.Status.TRANSACTION_FAILED
+			return result
+		result.base_value += fish_catch.sale_value
+		result.payout += offer
+		if result.fish_count == 1:
+			result.catch_id = fish_catch.catch_id
+			result.fish_name = fish_catch.fish.display_name
+	if contains_favorite:
 		result.status = FishSaleResultType.Status.FAVORITED
-	elif fish_catch.sale_value < 0:
-		result.status = FishSaleResultType.Status.INVALID_VALUE
-	elif result.payout < 0:
-		result.status = FishSaleResultType.Status.INVALID_OFFER
-	elif not _wallet.can_credit(result.payout):
+		return result
+	if not _wallet.can_credit(result.payout):
 		result.status = FishSaleResultType.Status.TRANSACTION_FAILED
-	else:
-		result.status = FishSaleResultType.Status.SUCCESS
-		result.success = true
+		return result
+	result.status = FishSaleResultType.Status.SUCCESS
+	result.success = true
+	if result.fish_count == 1:
 		result.sale_message = buyer.get_sale_message(
 			result.fish_name,
 			result.payout
 		)
+	else:
+		result.sale_message = "you sold %d fish to the %s for $%d." % [
+			result.fish_count,
+			result.buyer_animal_name,
+			result.payout,
+		]
 	return result

inventory/fish_inventory.gd

@@ -95,18 +95,40 @@ func contains_catch_id(catch_id: StringName) -> bool:
 func remove_catch_by_id(catch_id: StringName) -> FishCatchType:
 	if catch_id.is_empty():
 		return null
-	for index: int in range(_catches.size()):
-		var fish_catch: FishCatchType = _catches[index]
-		if fish_catch == null or fish_catch.catch_id != catch_id:
-			continue
-		_catches.remove_at(index)
-		contents_changed.emit(
-			fish_catch.fish_id,
-			get_count(fish_catch.fish_id)
-		)
-		catches_changed.emit()
-		return fish_catch
-	return null
+	var removed: Array[FishCatchType] = remove_catches_by_ids([catch_id])
+	return removed.front() if removed.size() == 1 else null
+
+
+func remove_catches_by_ids(
+	catch_ids: Array[StringName],
+) -> Array[FishCatchType]:
+	var removed: Array[FishCatchType] = []
+	if catch_ids.is_empty():
+		return removed
+	var requested_ids: Dictionary[StringName, bool] = {}
+	for catch_id: StringName in catch_ids:
+		if catch_id.is_empty() or requested_ids.has(catch_id):
+			return removed
+		requested_ids[catch_id] = true
+	for catch_id: StringName in catch_ids:
+		var fish_catch: FishCatchType = get_catch_by_id(catch_id)
+		if fish_catch == null:
+			removed.clear()
+			return removed
+		removed.append(fish_catch)
+
+	var remaining: Array[FishCatchType] = []
+	var affected_species: Dictionary[StringName, bool] = {}
+	for fish_catch: FishCatchType in _catches:
+		if requested_ids.has(fish_catch.catch_id):
+			affected_species[fish_catch.fish_id] = true
+		else:
+			remaining.append(fish_catch)
+	_catches = remaining
+	for fish_id: StringName in affected_species:
+		contents_changed.emit(fish_id, get_count(fish_id))
+	catches_changed.emit()
+	return removed
 
 
 func set_catch_favorited(

ui/fish_batch_selection.gd

@@ -0,0 +1,106 @@
+class_name FishBatchSelection
+extends RefCounted
+
+var _selected_ids: Dictionary[StringName, bool] = {}
+var _visible_ids: Array[StringName] = []
+var _focused_id: StringName
+var _anchor_id: StringName
+
+
+func set_visible_order(visible_ids: Array[StringName]) -> void:
+	_visible_ids = visible_ids.duplicate()
+	var visible_set: Dictionary[StringName, bool] = {}
+	for catch_id: StringName in _visible_ids:
+		if not catch_id.is_empty():
+			visible_set[catch_id] = true
+	for catch_id: StringName in _selected_ids.keys():
+		if not visible_set.has(catch_id):
+			_selected_ids.erase(catch_id)
+	if not visible_set.has(_focused_id):
+		_focused_id = StringName()
+	if not visible_set.has(_anchor_id):
+		_anchor_id = StringName()
+
+
+func apply_click(
+	catch_id: StringName,
+	ctrl_pressed: bool,
+	shift_pressed: bool,
+) -> void:
+	if catch_id.is_empty() or not _visible_ids.has(catch_id):
+		return
+	if not shift_pressed or _anchor_id.is_empty():
+		if ctrl_pressed:
+			if _selected_ids.has(catch_id):
+				_selected_ids.erase(catch_id)
+			else:
+				_selected_ids[catch_id] = true
+		else:
+			_selected_ids.clear()
+			_selected_ids[catch_id] = true
+		_focused_id = catch_id
+		_anchor_id = catch_id
+		return
+
+	var anchor_index: int = _visible_ids.find(_anchor_id)
+	var target_index: int = _visible_ids.find(catch_id)
+	if anchor_index < 0 or target_index < 0:
+		select_only(catch_id)
+		return
+	if not ctrl_pressed:
+		_selected_ids.clear()
+	var first_index: int = mini(anchor_index, target_index)
+	var last_index: int = maxi(anchor_index, target_index)
+	for index: int in range(first_index, last_index + 1):
+		_selected_ids[_visible_ids[index]] = true
+	_focused_id = catch_id
+
+
+func select_only(catch_id: StringName) -> void:
+	_selected_ids.clear()
+	if catch_id.is_empty() or not _visible_ids.has(catch_id):
+		_focused_id = StringName()
+		_anchor_id = StringName()
+		return
+	_selected_ids[catch_id] = true
+	_focused_id = catch_id
+	_anchor_id = catch_id
+
+
+func clear() -> void:
+	_selected_ids.clear()
+	_focused_id = StringName()
+	_anchor_id = StringName()
+
+
+func remove_ids(catch_ids: Array[StringName]) -> void:
+	for catch_id: StringName in catch_ids:
+		_selected_ids.erase(catch_id)
+		if _focused_id == catch_id:
+			_focused_id = StringName()
+		if _anchor_id == catch_id:
+			_anchor_id = StringName()
+
+
+func get_selected_ids() -> Array[StringName]:
+	var selected_in_order: Array[StringName] = []
+	for catch_id: StringName in _visible_ids:
+		if _selected_ids.has(catch_id):
+			selected_in_order.append(catch_id)
+	return selected_in_order
+
+
+func is_selected(catch_id: StringName) -> bool:
+	return _selected_ids.has(catch_id)
+
+
+func get_selected_count() -> int:
+	return _selected_ids.size()
+
+
+func get_focused_id() -> StringName:
+	return _focused_id
+
+
+func get_anchor_id() -> StringName:
+	return _anchor_id

ui/fish_batch_selection.gd.uid

@@ -0,0 +1 @@
+uid://ct2140qw4pdug

ui/fishing_shop.gd

@@ -24,6 +24,9 @@ const PlayerCoolerCapacityType = preload(
 const ShopInteractionType = preload(
 	"res://world/fishing_shop_interaction.gd"
 )
+const FishBatchSelectionType = preload(
+	"res://ui/fish_batch_selection.gd"
+)
 
 signal menu_visibility_changed(is_open: bool)
 
@@ -42,6 +45,7 @@ enum CloseReason {
 @onready var _fish_texture: TextureRect = %FishTexture
 @onready var _fish_name: Label = %FishName
 @onready var _fish_details: Label = %FishDetails
+@onready var _selection_summary: Label = %SelectionSummary
 @onready var _sell_button: Button = %SellButton
 @onready var _feedback: Label = %Feedback
 @onready var _reel_level: Label = %ReelLevel
@@ -73,14 +77,16 @@ var _interaction: ShopInteractionType
 var _bag: PlayerBagType
 var _item_catalog: ItemCatalogType
 var _cooler_capacity: PlayerCoolerCapacityType
-var _selected_catch_id: StringName
-var _confirmation_catch_id: StringName
+var _fish_selection := FishBatchSelectionType.new()
+var _confirmation_catch_ids: Array[StringName] = []
+var _confirmation_generation: int = -1
 var _prior_movement_enabled: bool = true
 var _prior_camera_enabled: bool = true
 var _prior_mouse_mode: Input.MouseMode = Input.MOUSE_MODE_VISIBLE
 var _snapshot_stored: bool = false
 var _mouse_snapshot_stored: bool = false
 var _generation: int = 0
+var _selection_input_generation: int = 0
 var _transaction_in_progress: bool = false
 var _closing: bool = false
 
@@ -88,6 +94,7 @@ var _closing: bool = false
 func _ready() -> void:
 	%CloseButton.pressed.connect(close_shop)
 	_fish_list.item_selected.connect(_on_fish_selected)
+	_fish_list.item_clicked.connect(_on_fish_clicked)
 	_sell_button.pressed.connect(_open_sale_confirmation)
 	_confirm_sale.pressed.connect(_on_confirm_sale)
 	_cancel_sale.pressed.connect(_close_sale_confirmation)
@@ -120,6 +127,7 @@ func setup(
 	_bag = bag
 	_item_catalog = item_catalog
 	_cooler_capacity = cooler_capacity
+	_fish_selection.clear()
 	if not _inventory.catches_changed.is_connected(_on_inventory_changed):
 		_inventory.catches_changed.connect(_on_inventory_changed)
 	if not _wallet.balance_changed.is_connected(_on_wallet_changed):
@@ -189,7 +197,7 @@ func close_shop(
 	_generation += 1
 	_transaction_in_progress = false
 	_close_sale_confirmation()
-	_selected_catch_id = StringName()
+	_fish_selection.clear()
 	hide()
 	get_viewport().gui_release_focus()
 	if _fishing_spot != null and is_instance_valid(_fishing_spot):
@@ -242,9 +250,9 @@ func _refresh_all() -> void:
 
 func _refresh_wallet() -> void:
 	_wallet_label.text = (
-		"Wallet: $%d" % _wallet.get_balance()
+		"wallet: $%d" % _wallet.get_balance()
 		if _wallet != null
-		else "Wallet: $0"
+		else "wallet: $0"
 	)
 
 
@@ -253,7 +261,7 @@ func _refresh_fish_list() -> void:
 	var catches: Array[FishCatchType] = (
 		_inventory.get_all_catches() if _inventory != null else []
 	)
-	_sales_title.text = "Cooler %d / %d • Full base value" % [
+	_sales_title.text = "cooler %d / %d • full base value" % [
 		catches.size(),
 		_cooler_capacity.get_capacity() if _cooler_capacity != null else 0,
 	]
@@ -261,11 +269,21 @@ func _refresh_fish_list() -> void:
 		func(a: FishCatchType, b: FishCatchType) -> bool:
 			return a.catch_sequence > b.catch_sequence
 	)
-	var selected_index: int = -1
+	var visible_ids: Array[StringName] = []
+	for fish_catch: FishCatchType in catches:
+		if fish_catch != null and fish_catch.is_valid():
+			visible_ids.append(fish_catch.catch_id)
+	_fish_selection.set_visible_order(visible_ids)
 	for fish_catch: FishCatchType in catches:
 		if fish_catch == null or not fish_catch.is_valid():
 			continue
-		var marker: String = "★ " if fish_catch.is_favorited else ""
+		var marker: String = ""
+		if _fish_selection.is_selected(fish_catch.catch_id):
+			marker += "✓ "
+		if fish_catch.catch_id == _fish_selection.get_focused_id():
+			marker += "◆ "
+		if fish_catch.is_favorited:
+			marker += "★ "
 		var index: int = _fish_list.add_item(
 			"%s%s — %.2f lb"
 			% [marker, fish_catch.fish.display_name, fish_catch.weight_lb],
@@ -277,16 +295,15 @@ func _refresh_fish_list() -> void:
 			"%s • %s"
 			% [
 				fish_catch.fish.get_rarity_name(),
-				"Favorited" if fish_catch.is_favorited else "Available",
+				"favorited" if fish_catch.is_favorited else "available",
 			]
 		)
-		if fish_catch.catch_id == _selected_catch_id:
-			selected_index = index
 	_fish_empty.visible = _fish_list.item_count == 0
-	if selected_index >= 0:
-		_fish_list.select(selected_index)
-	elif not _selected_catch_id.is_empty():
-		_selected_catch_id = StringName()
+	_fish_list.deselect_all()
+	for index: int in range(_fish_list.item_count):
+		var catch_id := StringName(str(_fish_list.get_item_metadata(index)))
+		if _fish_selection.is_selected(catch_id):
+			_fish_list.select(index, false)
 
 
 func _refresh_selected_fish() -> void:
@@ -295,27 +312,72 @@ func _refresh_selected_fish() -> void:
 		fish_catch.fish.display_texture if fish_catch != null else null
 	)
 	_fish_name.text = (
-		fish_catch.fish.display_name if fish_catch != null else "Select a fish"
+		fish_catch.fish.display_name if fish_catch != null else "select a fish"
 	)
 	if fish_catch == null:
-		_fish_details.text = "Choose one individual fish from your Cooler."
-		_sell_button.disabled = true
+		_fish_details.text = "choose one individual fish from your cooler."
+		_update_sale_summary()
 		return
-	var offer: int = _buyer.get_offer(fish_catch.sale_value)
+	var individual_preview: FishSaleResultType = (
+		_sale_service.preview_batch([fish_catch.catch_id], _buyer)
+		if _sale_service != null
+		else null
+	)
+	var offer: int = (
+		individual_preview.payout if individual_preview != null else -1
+	)
 	_fish_details.text = (
-		"%.2f lb • %s\nBase value: $%d\nMain-shop offer: $%d%s"
+		"%.2f lb • %s\nbase value: $%d\nmain-shop offer: $%d%s"
 		% [
 			fish_catch.weight_lb,
 			fish_catch.fish.get_rarity_name(),
 			fish_catch.sale_value,
 			offer,
-			"\nFavorited fish cannot be sold."
+			"\nfavorited fish cannot be sold."
 			if fish_catch.is_favorited
 			else "",
 		]
 	)
+	_update_sale_summary()
+
+
+func _update_sale_summary() -> void:
+	var selected_ids: Array[StringName] = _fish_selection.get_selected_ids()
+	var selected_count: int = selected_ids.size()
+	_sell_button.text = (
+		"sell fish"
+		if selected_count <= 1
+		else "sell %d fish" % selected_count
+	)
+	if selected_count == 0:
+		_selection_summary.text = "no fish selected"
+		_sell_button.disabled = true
+		return
+	var preview: FishSaleResultType = (
+		_sale_service.preview_batch(selected_ids, _buyer)
+		if _sale_service != null
+		else null
+	)
+	_selection_summary.text = (
+		"1 fish selected"
+		if selected_count == 1
+		else "%d fish selected" % selected_count
+	)
+	if (
+		preview != null
+		and (
+			preview.is_success()
+			or preview.status == FishSaleResultType.Status.FAVORITED
+		)
+	):
+		_selection_summary.text += "\ntotal offer: $%d" % preview.payout
+	if preview != null and preview.status == FishSaleResultType.Status.FAVORITED:
+		_selection_summary.text += (
+			"\nfavorited fish must be removed from the selection."
+		)
 	_sell_button.disabled = (
-		fish_catch.is_favorited
+		preview == null
+		or not preview.is_success()
 		or _transaction_in_progress
 		or _closing
 	)
@@ -326,7 +388,7 @@ func _refresh_upgrades() -> void:
 		return
 	var reel_level: int = _upgrades.get_reel_speed_level()
 	var reel_cost: int = _upgrades.get_next_reel_speed_cost()
-	_reel_level.text = "Level %d" % reel_level
+	_reel_level.text = "level %d" % reel_level
 	_reel_purchase.disabled = (
 		reel_cost < 0
 		or _transaction_in_progress
@@ -335,7 +397,7 @@ func _refresh_upgrades() -> void:
 	)
 	if reel_cost < 0:
 		_reel_effect.text = "%.2f×" % _upgrades.get_reel_speed_multiplier()
-		_reel_cost.text = "MAX"
+		_reel_cost.text = "max"
 	else:
 		_reel_effect.text = (
 			"%.2f× → %.2f×"
@@ -345,10 +407,10 @@ func _refresh_upgrades() -> void:
 			]
 		)
 		_reel_cost.text = "$%d" % reel_cost
-	_reel_purchase.text = "MAX" if reel_cost < 0 else "Purchase"
+	_reel_purchase.text = "max" if reel_cost < 0 else "purchase"
 	var barrier_level: int = _upgrades.get_barrier_power_level()
 	var barrier_cost: int = _upgrades.get_next_barrier_power_cost()
-	_barrier_level.text = "Level %d" % barrier_level
+	_barrier_level.text = "level %d" % barrier_level
 	_barrier_purchase.disabled = (
 		barrier_cost < 0
 		or _transaction_in_progress
@@ -357,7 +419,7 @@ func _refresh_upgrades() -> void:
 	)
 	if barrier_cost < 0:
 		_barrier_effect.text = "%d damage" % _upgrades.get_barrier_damage()
-		_barrier_cost.text = "MAX"
+		_barrier_cost.text = "max"
 	else:
 		_barrier_effect.text = (
 			"%d damage → %d damage"
@@ -367,7 +429,7 @@ func _refresh_upgrades() -> void:
 			]
 		)
 		_barrier_cost.text = "$%d" % barrier_cost
-	_barrier_purchase.text = "MAX" if barrier_cost < 0 else "Purchase"
+	_barrier_purchase.text = "max" if barrier_cost < 0 else "purchase"
 
 
 func _refresh_supplies() -> void:
@@ -385,7 +447,7 @@ func _refresh_supplies() -> void:
 		button.icon = item.icon
 		button.expand_icon = true
 		button.alignment = HORIZONTAL_ALIGNMENT_LEFT
-		button.text = "%s\n$%d • Owned %d" % [
+		button.text = "%s\n$%d • owned %d" % [
 			item.display_name,
 			FishingShopStockType.get_price(item_id),
 			_bag.get_quantity(item_id),
@@ -409,7 +471,7 @@ func _refresh_cooler_capacity() -> void:
 	var level: int = _cooler_capacity.get_level()
 	var cost: int = _cooler_capacity.get_next_cost()
 	var next_capacity: int = _cooler_capacity.get_next_capacity()
-	_cooler_level.text = "Level %d" % level
+	_cooler_level.text = "level %d" % level
 	_cooler_purchase.disabled = (
 		cost < 0
 		or _transaction_in_progress
@@ -418,46 +480,99 @@ func _refresh_cooler_capacity() -> void:
 	)
 	if cost < 0:
 		_cooler_effect.text = "%d fish" % _cooler_capacity.get_capacity()
-		_cooler_cost.text = "MAX"
-		_cooler_purchase.text = "MAX"
+		_cooler_cost.text = "max"
+		_cooler_purchase.text = "max"
 	else:
 		_cooler_effect.text = "%d → %d fish" % [
 			_cooler_capacity.get_capacity(),
 			next_capacity,
 		]
 		_cooler_cost.text = "$%d" % cost
-		_cooler_purchase.text = "Purchase"
+		_cooler_purchase.text = "purchase"
 
 
 func _on_fish_selected(index: int) -> void:
 	if index < 0 or index >= _fish_list.item_count:
 		return
-	_selected_catch_id = StringName(str(_fish_list.get_item_metadata(index)))
+	var input_generation: int = _selection_input_generation
+	call_deferred(
+		"_apply_keyboard_fish_selection",
+		index,
+		input_generation
+	)
+
+
+func _apply_keyboard_fish_selection(
+	index: int,
+	input_generation: int,
+) -> void:
+	if (
+		input_generation != _selection_input_generation
+		or index < 0
+		or index >= _fish_list.item_count
+	):
+		return
+	var catch_id := StringName(str(_fish_list.get_item_metadata(index)))
+	_fish_selection.select_only(catch_id)
 	_feedback.text = ""
+	_refresh_fish_list()
+	_refresh_selected_fish()
+
+
+func _on_fish_clicked(
+	index: int,
+	_position: Vector2,
+	mouse_button_index: int,
+) -> void:
+	if (
+		mouse_button_index != MOUSE_BUTTON_LEFT
+		or index < 0
+		or index >= _fish_list.item_count
+	):
+		return
+	_selection_input_generation += 1
+	var catch_id := StringName(str(_fish_list.get_item_metadata(index)))
+	_fish_selection.apply_click(
+		catch_id,
+		Input.is_key_pressed(KEY_CTRL),
+		Input.is_key_pressed(KEY_SHIFT)
+	)
+	_feedback.text = ""
+	_refresh_fish_list()
 	_refresh_selected_fish()
 
 
 func _open_sale_confirmation() -> void:
-	var fish_catch: FishCatchType = _get_selected_catch()
-	if not _is_transaction_context_valid() or fish_catch == null:
-		_feedback.text = "This fish is no longer available."
+	var selected_ids: Array[StringName] = _fish_selection.get_selected_ids()
+	if not _is_transaction_context_valid() or selected_ids.is_empty():
+		_feedback.text = "the fish selection is no longer available."
 		_refresh_all()
 		return
-	if fish_catch.is_favorited:
-		_feedback.text = "Favorited fish cannot be sold."
+	var preview: FishSaleResultType = _sale_service.preview_batch(
+		selected_ids,
+		_buyer
+	)
+	if not preview.is_success():
+		_feedback.text = (
+			"favorited fish cannot be sold. "
+			+ "remove them from the selection first."
+			if preview.status == FishSaleResultType.Status.FAVORITED
+			else preview.get_message()
+		)
 		return
-	_confirmation_catch_id = fish_catch.catch_id
-	var offer: int = _buyer.get_offer(fish_catch.sale_value)
+	_confirmation_catch_ids = selected_ids.duplicate()
+	_confirmation_generation = _generation
 	_confirmation_text.text = (
-		"Sell this %.2f lb %s to the Fishing Shop for $%d?"
-		% [fish_catch.weight_lb, fish_catch.fish.display_name, offer]
+		"sell %d fish to the fishing shop for $%d?"
+		% [preview.fish_count, preview.payout]
 	)
 	_confirmation.show()
 	_cancel_sale.grab_focus()
 
 
 func _close_sale_confirmation() -> void:
-	_confirmation_catch_id = StringName()
+	_confirmation_catch_ids.clear()
+	_confirmation_generation = -1
 	_confirmation.hide()
 
 
@@ -465,18 +580,23 @@ func _on_confirm_sale() -> void:
 	if _transaction_in_progress:
 		return
 	var transaction_generation: int = _generation
-	var catch_id: StringName = _confirmation_catch_id
+	var catch_ids: Array[StringName] = _confirmation_catch_ids.duplicate()
+	var confirmation_generation: int = _confirmation_generation
 	_close_sale_confirmation()
 	if (
-		catch_id.is_empty()
+		catch_ids.is_empty()
 		or not _is_transaction_context_valid()
 		or transaction_generation != _generation
+		or confirmation_generation != transaction_generation
 		or _buyer.id != MAIN_SHOP_BUYER_ID
 	):
-		_feedback.text = "Unable to complete sale."
+		_feedback.text = "unable to complete sale."
 		return
 	_transaction_in_progress = true
-	var result: FishSaleResultType = _sale_service.sell(catch_id, _buyer)
+	var result: FishSaleResultType = _sale_service.sell_batch(
+		catch_ids,
+		_buyer
+	)
 	_transaction_in_progress = false
 	if (
 		transaction_generation != _generation
@@ -484,8 +604,15 @@ func _on_confirm_sale() -> void:
 	):
 		return
 	if result.is_success():
-		_feedback.text = "Fish sold for $%d." % result.payout
-		_selected_catch_id = StringName()
+		_feedback.text = (
+			"fish sold for $%d."
+			if result.fish_count == 1
+			else "%d fish sold for $%d." % [
+				result.fish_count,
+				result.payout,
+			]
+		)
+		_fish_selection.remove_ids(catch_ids)
 	else:
 		_feedback.text = result.get_message()
 	_refresh_all()
@@ -501,14 +628,14 @@ func _purchase_barrier_power() -> void:
 
 func _purchase_supply(item_id: StringName) -> void:
 	if _transaction_in_progress or not _is_transaction_context_valid():
-		_feedback.text = "Unable to complete purchase."
+		_feedback.text = "unable to complete purchase."
 		return
 	var price: int = FishingShopStockType.get_price(item_id)
 	if not _bag.can_add_item(item_id, 1):
-		_feedback.text = "Bag cannot accept this item."
+		_feedback.text = "bag cannot accept this item."
 		return
 	if not _wallet.can_afford(price):
-		_feedback.text = "Not enough money."
+		_feedback.text = "not enough money."
 		return
 	var transaction_generation: int = _generation
 	_transaction_in_progress = true
@@ -522,21 +649,21 @@ func _purchase_supply(item_id: StringName) -> void:
 	if transaction_generation != _generation or not visible:
 		return
 	_feedback.text = (
-		"Item purchased." if purchased else "Unable to complete purchase."
+		"item purchased." if purchased else "unable to complete purchase."
 	)
 	_refresh_all()
 
 
 func _purchase_cooler_capacity() -> void:
 	if _transaction_in_progress or not _is_transaction_context_valid():
-		_feedback.text = "Unable to complete purchase."
+		_feedback.text = "unable to complete purchase."
 		return
 	var cost: int = _cooler_capacity.get_next_cost()
 	if cost < 0:
-		_feedback.text = "Maximum level reached."
+		_feedback.text = "maximum level reached."
 		return
 	if not _wallet.can_afford(cost):
-		_feedback.text = "Not enough money."
+		_feedback.text = "not enough money."
 		return
 	var transaction_generation: int = _generation
 	_transaction_in_progress = true
@@ -545,16 +672,16 @@ func _purchase_cooler_capacity() -> void:
 	if transaction_generation != _generation or not visible:
 		return
 	_feedback.text = (
-		"Upgrade purchased."
+		"upgrade purchased."
 		if purchased
-		else "Unable to complete purchase."
+		else "unable to complete purchase."
 	)
 	_refresh_all()
 
 
 func _purchase_upgrade(is_reel_speed: bool) -> void:
 	if _transaction_in_progress or not _is_transaction_context_valid():
-		_feedback.text = "Unable to complete purchase."
+		_feedback.text = "unable to complete purchase."
 		return
 	var cost: int = (
 		_upgrades.get_next_reel_speed_cost()
@@ -562,10 +689,10 @@ func _purchase_upgrade(is_reel_speed: bool) -> void:
 		else _upgrades.get_next_barrier_power_cost()
 	)
 	if cost < 0:
-		_feedback.text = "Maximum level reached."
+		_feedback.text = "maximum level reached."
 		return
 	if not _wallet.can_afford(cost):
-		_feedback.text = "Not enough money."
+		_feedback.text = "not enough money."
 		return
 	var transaction_generation: int = _generation
 	_transaction_in_progress = true
@@ -578,17 +705,18 @@ func _purchase_upgrade(is_reel_speed: bool) -> void:
 	if transaction_generation != _generation or not visible:
 		return
 	_feedback.text = (
-		"Upgrade purchased."
+		"upgrade purchased."
 		if purchased
-		else "Unable to complete purchase."
+		else "unable to complete purchase."
 	)
 	_refresh_all()
 
 
 func _get_selected_catch() -> FishCatchType:
-	if _inventory == null or _selected_catch_id.is_empty():
+	var focused_id: StringName = _fish_selection.get_focused_id()
+	if _inventory == null or focused_id.is_empty():
 		return null
-	return _inventory.get_catch_by_id(_selected_catch_id)
+	return _inventory.get_catch_by_id(focused_id)
 
 
 func _is_transaction_context_valid() -> bool:
@@ -607,12 +735,22 @@ func _is_transaction_context_valid() -> bool:
 
 func _on_inventory_changed() -> void:
 	_refresh_fish_list()
-	if (
-		not _confirmation_catch_id.is_empty()
-		and _inventory.get_catch_by_id(_confirmation_catch_id) == null
-	):
-		_close_sale_confirmation()
-		_feedback.text = "This fish is no longer available."
+	if not _confirmation_catch_ids.is_empty():
+		var preview: FishSaleResultType = _sale_service.preview_batch(
+			_confirmation_catch_ids,
+			_buyer
+		)
+		if (
+			_confirmation_generation != _generation
+			or not preview.is_success()
+		):
+			_close_sale_confirmation()
+			_feedback.text = (
+				"favorited fish cannot be sold. "
+				+ "remove them from the selection first."
+				if preview.status == FishSaleResultType.Status.FAVORITED
+				else preview.get_message()
+			)
 	_refresh_selected_fish()
 
 

ui/fishing_shop.tscn

@@ -63,7 +63,7 @@ theme_override_constants/separation = 8
 [node name="Title" type="Label" parent="ShopPanel/Margin/Layout/Header"]
 layout_mode = 2
 size_flags_horizontal = 3
-text = "Fishing Shop"
+text = "fishing shop"
 theme_override_font_sizes/font_size = 24
 theme_override_colors/font_color = Color(0.208, 0.725, 0.78, 1)
 
@@ -78,12 +78,12 @@ texture_filter = 1
 [node name="WalletLabel" type="Label" parent="ShopPanel/Margin/Layout/Header"]
 unique_name_in_owner = true
 layout_mode = 2
-text = "Wallet: $0"
+text = "wallet: $0"
 
 [node name="CloseButton" type="Button" parent="ShopPanel/Margin/Layout/Header"]
 unique_name_in_owner = true
 layout_mode = 2
-text = "Close"
+text = "close"
 custom_minimum_size = Vector2(72, 30)
 
 [node name="Feedback" type="Label" parent="ShopPanel/Margin/Layout"]
@@ -107,7 +107,7 @@ theme_override_constants/separation = 6
 [node name="SalesTitle" type="Label" parent="ShopPanel/Margin/Layout/Body/FishSales"]
 unique_name_in_owner = true
 layout_mode = 2
-text = "Sell individual Cooler fish • Full base value"
+text = "sell individual cooler fish • full base value"
 theme_override_font_sizes/font_size = 17
 
 [node name="SalesBody" type="HSplitContainer" parent="ShopPanel/Margin/Layout/Body/FishSales"]
@@ -133,7 +133,7 @@ layout_mode = 2
 [node name="FishEmpty" type="Label" parent="ShopPanel/Margin/Layout/Body/FishSales/SalesBody/ListPanel/ListMargin/ListStack"]
 unique_name_in_owner = true
 layout_mode = 2
-text = "Your Cooler is empty."
+text = "your cooler is empty."
 horizontal_alignment = 1
 
 [node name="FishList" type="ItemList" parent="ShopPanel/Margin/Layout/Body/FishSales/SalesBody/ListPanel/ListMargin/ListStack"]
@@ -142,6 +142,7 @@ layout_mode = 2
 size_flags_vertical = 3
 fixed_icon_size = Vector2i(48, 36)
 icon_mode = 1
+select_mode = 1
 same_column_width = true
 
 [node name="FishDetail" type="PanelContainer" parent="ShopPanel/Margin/Layout/Body/FishSales/SalesBody"]
@@ -170,22 +171,30 @@ texture_filter = 1
 [node name="FishName" type="Label" parent="ShopPanel/Margin/Layout/Body/FishSales/SalesBody/FishDetail/DetailMargin/DetailStack"]
 unique_name_in_owner = true
 layout_mode = 2
-text = "Select a fish"
+text = "select a fish"
 horizontal_alignment = 1
 theme_override_font_sizes/font_size = 19
 
 [node name="FishDetails" type="Label" parent="ShopPanel/Margin/Layout/Body/FishSales/SalesBody/FishDetail/DetailMargin/DetailStack"]
 unique_name_in_owner = true
 layout_mode = 2
-text = "Choose one individual fish from your Cooler."
+text = "choose one individual fish from your cooler."
 horizontal_alignment = 1
 autowrap_mode = 2
 
+[node name="SelectionSummary" type="Label" parent="ShopPanel/Margin/Layout/Body/FishSales/SalesBody/FishDetail/DetailMargin/DetailStack"]
+unique_name_in_owner = true
+layout_mode = 2
+text = "no fish selected"
+horizontal_alignment = 1
+autowrap_mode = 2
+theme_override_colors/font_color = Color(0.208, 0.725, 0.78, 1)
+
 [node name="SellButton" type="Button" parent="ShopPanel/Margin/Layout/Body/FishSales/SalesBody/FishDetail/DetailMargin/DetailStack"]
 unique_name_in_owner = true
 layout_mode = 2
 disabled = true
-text = "Sell Selected"
+text = "sell selected"
 
 [node name="Upgrades" type="VBoxContainer" parent="ShopPanel/Margin/Layout/Body"]
 custom_minimum_size = Vector2(270, 0)
@@ -194,7 +203,7 @@ theme_override_constants/separation = 8
 
 [node name="UpgradeTitle" type="Label" parent="ShopPanel/Margin/Layout/Body/Upgrades"]
 layout_mode = 2
-text = "Fishing Upgrades"
+text = "fishing upgrades"
 theme_override_font_sizes/font_size = 17
 
 [node name="Supplies" type="VBoxContainer" parent="ShopPanel/Margin/Layout/Body"]
@@ -204,7 +213,7 @@ theme_override_constants/separation = 6
 
 [node name="Title" type="Label" parent="ShopPanel/Margin/Layout/Body/Supplies"]
 layout_mode = 2
-text = "Supplies"
+text = "supplies"
 theme_override_font_sizes/font_size = 17
 
 [node name="Scroll" type="ScrollContainer" parent="ShopPanel/Margin/Layout/Body/Supplies"]
@@ -246,13 +255,13 @@ size_flags_horizontal = 3
 
 [node name="Name" type="Label" parent="ShopPanel/Margin/Layout/Body/Upgrades/ReelCard/Margin/Row/Data"]
 layout_mode = 2
-text = "Reel Speed"
+text = "reel speed"
 theme_override_font_sizes/font_size = 17
 
 [node name="ReelLevel" type="Label" parent="ShopPanel/Margin/Layout/Body/Upgrades/ReelCard/Margin/Row/Data"]
 unique_name_in_owner = true
 layout_mode = 2
-text = "Level 0"
+text = "level 0"
 
 [node name="ReelEffect" type="Label" parent="ShopPanel/Margin/Layout/Body/Upgrades/ReelCard/Margin/Row/Data"]
 unique_name_in_owner = true
@@ -267,7 +276,7 @@ text = "$50"
 [node name="ReelPurchase" type="Button" parent="ShopPanel/Margin/Layout/Body/Upgrades/ReelCard/Margin/Row"]
 unique_name_in_owner = true
 layout_mode = 2
-text = "Purchase"
+text = "purchase"
 
 [node name="BarrierCard" type="PanelContainer" parent="ShopPanel/Margin/Layout/Body/Upgrades"]
 layout_mode = 2
@@ -297,13 +306,13 @@ size_flags_horizontal = 3
 
 [node name="Name" type="Label" parent="ShopPanel/Margin/Layout/Body/Upgrades/BarrierCard/Margin/Row/Data"]
 layout_mode = 2
-text = "Barrier Power"
+text = "barrier power"
 theme_override_font_sizes/font_size = 17
 
 [node name="BarrierLevel" type="Label" parent="ShopPanel/Margin/Layout/Body/Upgrades/BarrierCard/Margin/Row/Data"]
 unique_name_in_owner = true
 layout_mode = 2
-text = "Level 0"
+text = "level 0"
 
 [node name="BarrierEffect" type="Label" parent="ShopPanel/Margin/Layout/Body/Upgrades/BarrierCard/Margin/Row/Data"]
 unique_name_in_owner = true
@@ -318,7 +327,7 @@ text = "$100"
 [node name="BarrierPurchase" type="Button" parent="ShopPanel/Margin/Layout/Body/Upgrades/BarrierCard/Margin/Row"]
 unique_name_in_owner = true
 layout_mode = 2
-text = "Purchase"
+text = "purchase"
 
 [node name="CoolerCard" type="PanelContainer" parent="ShopPanel/Margin/Layout/Body/Upgrades"]
 layout_mode = 2
@@ -348,13 +357,13 @@ size_flags_horizontal = 3
 
 [node name="Name" type="Label" parent="ShopPanel/Margin/Layout/Body/Upgrades/CoolerCard/Margin/Row/Data"]
 layout_mode = 2
-text = "Cooler Capacity"
+text = "cooler capacity"
 theme_override_font_sizes/font_size = 17
 
 [node name="CoolerLevel" type="Label" parent="ShopPanel/Margin/Layout/Body/Upgrades/CoolerCard/Margin/Row/Data"]
 unique_name_in_owner = true
 layout_mode = 2
-text = "Level 0"
+text = "level 0"
 
 [node name="CoolerEffect" type="Label" parent="ShopPanel/Margin/Layout/Body/Upgrades/CoolerCard/Margin/Row/Data"]
 unique_name_in_owner = true
@@ -369,7 +378,7 @@ text = "$75"
 [node name="CoolerPurchase" type="Button" parent="ShopPanel/Margin/Layout/Body/Upgrades/CoolerCard/Margin/Row"]
 unique_name_in_owner = true
 layout_mode = 2
-text = "Purchase"
+text = "purchase"
 
 [node name="SaleConfirmation" type="PanelContainer" parent="."]
 unique_name_in_owner = true
@@ -413,10 +422,10 @@ theme_override_constants/separation = 8
 [node name="ConfirmSale" type="Button" parent="SaleConfirmation/Margin/Stack/Buttons"]
 unique_name_in_owner = true
 layout_mode = 2
-text = "Sell Fish"
+text = "sell fish"
 theme_type_variation = &"DangerButton"
 
 [node name="CancelSale" type="Button" parent="SaleConfirmation/Margin/Stack/Buttons"]
 unique_name_in_owner = true
 layout_mode = 2
-text = "Cancel"
+text = "cancel"

ui/player_menu.gd

@@ -22,6 +22,9 @@ const ItemDragSourceType = preload("res://ui/item_drag_source.gd")
 const PlayerCoolerCapacityType = preload(
 	"res://progression/player_cooler_capacity.gd"
 )
+const FishBatchSelectionType = preload(
+	"res://ui/fish_batch_selection.gd"
+)
 
 signal menu_visibility_changed(is_open: bool)
 
@@ -68,6 +71,7 @@ enum CloseReason {
 @onready var _detail_texture: TextureRect = %DetailTexture
 @onready var _detail_name: Label = %DetailName
 @onready var _detail_data: Label = %DetailData
+@onready var _selection_summary: Label = %SelectionSummary
 @onready var _favorite_button: Button = %FavoriteButton
 @onready var _sell_button: Button = %SellButton
 @onready var _sale_unavailable: Label = %SaleUnavailable
@@ -94,7 +98,7 @@ var _cooler_capacity: PlayerCoolerCapacityType
 var _current_section: Section = Section.COOLER
 var _sort_mode: SortMode = SortMode.CATCH_ORDER
 var _sort_descending: bool = true
-var _selected_catch_id: StringName
+var _fish_selection := FishBatchSelectionType.new()
 var _selected_bag_item_id: StringName
 var _prior_movement_enabled: bool = true
 var _prior_camera_input_enabled: bool = true
@@ -102,9 +106,10 @@ var _prior_mouse_mode: Input.MouseMode = Input.MOUSE_MODE_VISIBLE
 var _control_snapshot_stored: bool = false
 var _mouse_snapshot_stored: bool = false
 var _menu_generation: int = 0
-var _confirmation_catch_id: StringName
+var _confirmation_catch_ids: Array[StringName] = []
 var _confirmation_buyer: FishBuyerProfileType
 var _confirmation_buyer_id: StringName
+var _confirmation_generation: int = -1
 var _sale_in_progress: bool = false
 
 
@@ -123,9 +128,9 @@ func _ready() -> void:
 	_sell_button.pressed.connect(_on_sell_pressed)
 	_confirm_sale_button.pressed.connect(_on_confirm_sale_pressed)
 	_cancel_sale_button.pressed.connect(_close_sale_confirmation)
-	_sort_option.add_item("Catch order", SortMode.CATCH_ORDER)
-	_sort_option.add_item("Name", SortMode.NAME)
-	_sort_option.add_item("Rarity", SortMode.RARITY)
+	_sort_option.add_item("catch order", SortMode.CATCH_ORDER)
+	_sort_option.add_item("name", SortMode.NAME)
+	_sort_option.add_item("rarity", SortMode.RARITY)
 	_sort_option.select(SortMode.CATCH_ORDER)
 	_update_sort_direction_text()
 	_show_section(_current_section)
@@ -157,6 +162,7 @@ func setup(
 	_hotbar = hotbar
 	_item_catalog = item_catalog
 	_cooler_capacity = cooler_capacity
+	_fish_selection.clear()
 	if not _inventory.catches_changed.is_connected(_on_inventory_changed):
 		_inventory.catches_changed.connect(_on_inventory_changed)
 	if not _collection_log.fish_discovered.is_connected(_on_fish_discovered):
@@ -234,6 +240,13 @@ func close_menu(
 		return
 	get_viewport().gui_cancel_drag()
 	_close_sale_confirmation()
+	if reason in [
+		CloseReason.BITE_STARTED,
+		CloseReason.WATER_RECOVERY,
+		CloseReason.SESSION_END,
+		CloseReason.TEARDOWN,
+	]:
+		_fish_selection.clear()
 	var closing_generation: int = _menu_generation
 	visible = false
 	get_viewport().gui_release_focus()
@@ -249,6 +262,7 @@ func close_menu(
 
 
 func close_for_water_recovery() -> void:
+	_fish_selection.clear()
 	close_menu(CloseReason.WATER_RECOVERY, false)
 
 
@@ -257,13 +271,14 @@ func close_for_game_menu() -> void:
 
 
 func close_for_session_end() -> void:
+	_fish_selection.clear()
 	close_menu(CloseReason.SESSION_END, false)
 
 
 func _exit_tree() -> void:
 	if visible:
 		close_menu(CloseReason.TEARDOWN, false)
-		_selected_catch_id = StringName()
+	_fish_selection.clear()
 	_menu_generation += 1
 
 
@@ -340,11 +355,11 @@ func _on_sort_direction_pressed() -> void:
 func _update_sort_direction_text() -> void:
 	match _sort_mode:
 		SortMode.CATCH_ORDER:
-			_sort_direction.text = "Newest first" if _sort_descending else "Oldest first"
+			_sort_direction.text = "newest first" if _sort_descending else "oldest first"
 		SortMode.NAME:
-			_sort_direction.text = "Z–A" if _sort_descending else "A–Z"
+			_sort_direction.text = "z–a" if _sort_descending else "a–z"
 		SortMode.RARITY:
-			_sort_direction.text = "High to low" if _sort_descending else "Low to high"
+			_sort_direction.text = "high to low" if _sort_descending else "low to high"
 
 
 func _refresh_all() -> void:
@@ -386,9 +401,9 @@ func _refresh_bag() -> void:
 			item.get_category_name(),
 		]
 		card.tooltip_text = (
-			"Drag to a hotbar slot."
+			"drag to a hotbar slot."
 			if item.hotbar_allowed
-			else "This item cannot be assigned to the hotbar."
+			else "this item cannot be assigned to the hotbar."
 		)
 		card.setup(item.item_id, item.display_name, item.icon)
 		card.pressed.connect(_select_bag_item.bind(item.item_id))
@@ -427,19 +442,19 @@ func _update_bag_detail() -> void:
 	_bag_detail_texture.texture = item.icon if item != null else null
 	_bag_detail_name.text = item.display_name if item != null else ""
 	_bag_detail_data.text = (
-		"%s\nQuantity: %d\n%s\n%s"
+		"%s\nquantity: %d\n%s\n%s"
 		% [
 			item.get_category_name(),
 			quantity,
 			item.description,
 			(
-				"Can be assigned to the hotbar."
+				"can be assigned to the hotbar."
 				if item.hotbar_allowed
-				else "Cannot be assigned to the hotbar."
+				else "cannot be assigned to the hotbar."
 			),
 		]
 		if item != null
-		else "Select a Bag item for details."
+		else "select a bag item for details."
 	)
 
 
@@ -470,8 +485,8 @@ func _refresh_economy_summary() -> void:
 		if _inventory != null
 		else 0
 	)
-	_wallet_balance.text = "Wallet: $%d" % balance
-	_held_value.text = "Held fish base value: $%d" % held_total
+	_wallet_balance.text = "wallet: $%d" % balance
+	_held_value.text = "held fish base value: $%d" % held_total
 	_cooler_count.text = "%d / %d" % [
 		_inventory.get_all_catches().size() if _inventory != null else 0,
 		_cooler_capacity.get_capacity() if _cooler_capacity != null else 0,
@@ -493,16 +508,18 @@ func _refresh_inventory() -> void:
 				catches.append(fish_catch)
 	catches.sort_custom(_compare_catches)
 	_inventory_empty.visible = catches.is_empty()
+	var visible_ids: Array[StringName] = []
+	for fish_catch: FishCatchType in catches:
+		visible_ids.append(fish_catch.catch_id)
+	_fish_selection.set_visible_order(visible_ids)
 
 	var selected: FishCatchType
 	if _inventory != null:
-		selected = _inventory.get_catch(_selected_catch_id)
-	if selected == null and not catches.is_empty():
-		selected = catches.front()
-		_selected_catch_id = selected.catch_id
+		selected = _inventory.get_catch(_fish_selection.get_focused_id())
 	for fish_catch: FishCatchType in catches:
 		_inventory_grid.add_child(_create_inventory_card(fish_catch))
 	_update_inventory_detail(selected)
+	_update_sale_summary()
 	_update_sort_direction_text()
 
 
@@ -527,11 +544,17 @@ func _create_inventory_card(fish_catch: FishCatchType) -> Button:
 	card.theme_type_variation = &"CardButton"
 	card.custom_minimum_size = Vector2(132.0, 118.0)
 	card.toggle_mode = true
-	card.button_pressed = fish_catch.catch_id == _selected_catch_id
-	card.pressed.connect(_select_catch.bind(fish_catch.catch_id))
+	var is_selected: bool = _fish_selection.is_selected(fish_catch.catch_id)
+	var is_focused: bool = (
+		fish_catch.catch_id == _fish_selection.get_focused_id()
+	)
+	card.button_pressed = is_selected
+	card.pressed.connect(_on_catch_card_pressed.bind(fish_catch.catch_id))
 	_apply_inventory_card_styles(
 		card,
-		UIPalette.get_rarity_color(fish_catch.fish.rarity)
+		UIPalette.get_rarity_color(fish_catch.fish.rarity),
+		is_selected,
+		is_focused
 	)
 
 	var content := VBoxContainer.new()
@@ -573,34 +596,83 @@ func _create_inventory_card(fish_catch: FishCatchType) -> Button:
 		favorite_marker.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
 		favorite_marker.mouse_filter = Control.MOUSE_FILTER_IGNORE
 		card.add_child(favorite_marker)
+	if is_selected:
+		var selected_marker := Label.new()
+		selected_marker.text = "✓"
+		selected_marker.add_theme_color_override(
+			"font_color",
+			UIPalette.SUCCESS
+		)
+		selected_marker.add_theme_font_size_override("font_size", 18)
+		selected_marker.set_anchors_preset(Control.PRESET_TOP_LEFT)
+		selected_marker.offset_left = 8.0
+		selected_marker.offset_top = 5.0
+		selected_marker.offset_right = 30.0
+		selected_marker.offset_bottom = 29.0
+		selected_marker.mouse_filter = Control.MOUSE_FILTER_IGNORE
+		card.add_child(selected_marker)
+	if is_focused:
+		var focus_marker := Label.new()
+		focus_marker.text = "◆"
+		focus_marker.add_theme_color_override(
+			"font_color",
+			UIPalette.PRIMARY
+		)
+		focus_marker.set_anchors_preset(Control.PRESET_BOTTOM_RIGHT)
+		focus_marker.offset_left = -26.0
+		focus_marker.offset_top = -25.0
+		focus_marker.offset_right = -8.0
+		focus_marker.offset_bottom = -7.0
+		focus_marker.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
+		focus_marker.mouse_filter = Control.MOUSE_FILTER_IGNORE
+		card.add_child(focus_marker)
 	return card
 
 
 func _apply_inventory_card_styles(
 	card: Button,
 	rarity_color: Color,
+	is_selected: bool,
+	is_focused: bool,
 ) -> void:
 	card.add_theme_stylebox_override(
 		"normal",
-		_create_inventory_card_style(rarity_color, 0)
+		_create_inventory_card_style(
+			rarity_color,
+			0,
+			is_selected,
+			is_focused
+		)
 	)
 	card.add_theme_stylebox_override(
 		"hover",
-		_create_inventory_card_style(rarity_color, 1)
+		_create_inventory_card_style(
+			rarity_color,
+			1,
+			is_selected,
+			is_focused
+		)
 	)
 	card.add_theme_stylebox_override(
 		"focus",
-		_create_inventory_card_style(rarity_color, 1)
+		_create_inventory_card_style(
+			rarity_color,
+			1,
+			is_selected,
+			true
+		)
 	)
 	card.add_theme_stylebox_override(
 		"pressed",
-		_create_inventory_card_style(rarity_color, 2)
+		_create_inventory_card_style(rarity_color, 2, true, is_focused)
 	)
 
 
 func _create_inventory_card_style(
 	rarity_color: Color,
 	state_index: int,
+	is_selected: bool,
+	is_focused: bool,
 ) -> StyleBoxFlat:
 	var style := StyleBoxFlat.new()
 	match state_index:
@@ -609,9 +681,13 @@ func _create_inventory_card_style(
 		2:
 			style.bg_color = UIPalette.PRIMARY.darkened(0.48)
 		_:
-			style.bg_color = UIPalette.ELEVATED_PANEL
+			style.bg_color = (
+				UIPalette.PRIMARY.darkened(0.55)
+				if is_selected
+				else UIPalette.ELEVATED_PANEL
+			)
 	style.border_color = rarity_color
-	var border_width: int = 4 if state_index == 2 else 2
+	var border_width: int = 4 if state_index == 2 or is_focused else 2
 	style.set_border_width_all(border_width)
 	style.set_corner_radius_all(8)
 	style.content_margin_left = 7.0
@@ -621,13 +697,18 @@ func _create_inventory_card_style(
 	return style
 
 
-func _select_catch(catch_id: StringName) -> void:
+func _on_catch_card_pressed(catch_id: StringName) -> void:
 	if _inventory == null:
 		return
 	var selected: FishCatchType = _inventory.get_catch(catch_id)
 	if selected == null:
 		return
-	_selected_catch_id = catch_id
+	_fish_selection.apply_click(
+		catch_id,
+		Input.is_key_pressed(KEY_CTRL),
+		Input.is_key_pressed(KEY_SHIFT)
+	)
+	_transaction_feedback.text = ""
 	_refresh_inventory()
 
 
@@ -638,26 +719,28 @@ func _update_inventory_detail(fish_catch: FishCatchType) -> void:
 		_detail_name.text = ""
 		_detail_data.text = ""
 		_favorite_button.disabled = true
-		_favorite_button.text = "Favorite"
-		_sell_button.disabled = true
-		_sale_unavailable.text = ""
-		_sale_unavailable.visible = false
+		_favorite_button.text = "favorite"
 		return
 	_detail_texture.texture = fish_catch.fish.display_texture
 	_detail_texture.visible = fish_catch.fish.display_texture != null
 	_detail_name.text = fish_catch.fish.display_name
+	var individual_preview: FishSaleResultType = (
+		_sale_service.preview_batch([fish_catch.catch_id], _default_buyer)
+		if _sale_service != null
+		else null
+	)
 	var buyer_offer: int = (
-		_default_buyer.get_offer(fish_catch.sale_value)
-		if _default_buyer != null
+		individual_preview.payout
+		if individual_preview != null
 		else -1
 	)
-	var buyer_offer_text: String = "Buyer unavailable"
-	if buyer_offer >= 0:
+	var buyer_offer_text: String = "buyer unavailable"
+	if buyer_offer >= 0 and _default_buyer != null:
 		buyer_offer_text = "%s offer: $%d" % [
 			_default_buyer.display_name,
 			buyer_offer,
 		]
-	_detail_data.text = "%.2f lb\n%s\nBase value: $%d\n%s" % [
+	_detail_data.text = "%.2f lb\n%s\nbase value: $%d\n%s" % [
 		fish_catch.weight_lb,
 		fish_catch.fish.get_rarity_name(),
 		fish_catch.sale_value,
@@ -665,35 +748,68 @@ func _update_inventory_detail(fish_catch: FishCatchType) -> void:
 	]
 	_favorite_button.disabled = false
 	_favorite_button.text = (
-		"Unfavorite" if fish_catch.is_favorited else "Favorite"
+		"unfavorite" if fish_catch.is_favorited else "favorite"
 	)
-	var valid_sale_value: bool = fish_catch.sale_value >= 0
-	var valid_buyer: bool = (
-		_default_buyer != null
-		and _default_buyer.is_valid()
-		and buyer_offer >= 0
+
+
+func _update_sale_summary() -> void:
+	var selected_ids: Array[StringName] = _fish_selection.get_selected_ids()
+	var selected_count: int = selected_ids.size()
+	_sell_button.text = (
+		"sell fish"
+		if selected_count == 1
+		else "sell %d fish" % selected_count
 	)
-	_sell_button.disabled = (
-		fish_catch.is_favorited
-		or not valid_sale_value
-		or not valid_buyer
+	if selected_count == 0:
+		_selection_summary.text = "no fish selected"
+		_sell_button.text = "sell fish"
+		_sell_button.disabled = true
+		_sale_unavailable.text = ""
+		_sale_unavailable.visible = false
+		return
+	var preview: FishSaleResultType = (
+		_sale_service.preview_batch(selected_ids, _default_buyer)
+		if _sale_service != null
+		else null
 	)
-	if fish_catch.is_favorited:
-		_sale_unavailable.text = "Favorited fish cannot be sold."
-	elif not valid_sale_value:
-		_sale_unavailable.text = "Invalid sale value."
-	elif not valid_buyer:
-		_sale_unavailable.text = "Buyer is unavailable."
+	var count_text: String = (
+		"1 fish selected"
+		if selected_count == 1
+		else "%d fish selected" % selected_count
+	)
+	_selection_summary.text = count_text
+	if (
+		preview != null
+		and preview.payout >= 0
+		and _default_buyer != null
+		and (
+			preview.is_success()
+			or preview.status == FishSaleResultType.Status.FAVORITED
+		)
+	):
+		_selection_summary.text += "\n%s total offer: $%d" % [
+			_default_buyer.display_name,
+			preview.payout,
+		]
+	_sell_button.disabled = preview == null or not preview.is_success()
+	if preview != null and preview.status == FishSaleResultType.Status.FAVORITED:
+		_sale_unavailable.text = (
+			"favorited fish cannot be sold. "
+			+ "remove them from the selection first."
+		)
+	elif preview != null and not preview.is_success():
+		_sale_unavailable.text = preview.get_message()
 	else:
 		_sale_unavailable.text = ""
 	_sale_unavailable.visible = not _sale_unavailable.text.is_empty()
 
 
 func _on_favorite_pressed() -> void:
-	if _inventory == null or _selected_catch_id.is_empty():
+	var focused_id: StringName = _fish_selection.get_focused_id()
+	if _inventory == null or focused_id.is_empty():
 		return
 	var fish_catch: FishCatchType = _inventory.get_catch_by_id(
-		_selected_catch_id
+		focused_id
 	)
 	if fish_catch == null:
 		_refresh_inventory()
@@ -712,46 +828,40 @@ func _on_favorite_pressed() -> void:
 
 
 func _on_sell_pressed() -> void:
+	var selected_ids: Array[StringName] = _fish_selection.get_selected_ids()
 	if (
 		_inventory == null
 		or _sale_service == null
 		or _default_buyer == null
-		or _selected_catch_id.is_empty()
+		or selected_ids.is_empty()
 	):
 		return
-	var fish_catch: FishCatchType = _inventory.get_catch_by_id(
-		_selected_catch_id
+	var preview: FishSaleResultType = _sale_service.preview_batch(
+		selected_ids,
+		_default_buyer
 	)
-	if fish_catch == null:
-		_transaction_feedback.text = "Fish no longer exists."
+	if not preview.is_success():
+		_transaction_feedback.text = (
+			"favorited fish cannot be sold. "
+			+ "remove them from the selection first."
+			if preview.status == FishSaleResultType.Status.FAVORITED
+			else preview.get_message()
+		)
 		_refresh_inventory()
 		return
-	if fish_catch.is_favorited:
-		_transaction_feedback.text = "Favorited fish cannot be sold."
-		return
-	if fish_catch.sale_value < 0:
-		_transaction_feedback.text = "Invalid sale value."
-		return
-	if not _default_buyer.is_valid():
-		_transaction_feedback.text = "Buyer is unavailable."
-		return
-	var buyer_offer: int = _default_buyer.get_offer(
-		fish_catch.sale_value
-	)
-	if buyer_offer < 0:
-		_transaction_feedback.text = "Invalid buyer offer."
-		return
-	_confirmation_catch_id = fish_catch.catch_id
+	_confirmation_catch_ids = selected_ids.duplicate()
 	_confirmation_buyer = _default_buyer
 	_confirmation_buyer_id = _default_buyer.id
+	_confirmation_generation = _menu_generation
+	var fish_label: String = "fish"
 	_confirmation_message.text = (
-		"Sell this %.2f lb %s to the %s for $%d?\nBase value: $%d"
+		"sell %d %s to the %s for $%d?\ncombined base value: $%d"
 		% [
-			fish_catch.weight_lb,
-			fish_catch.fish.display_name,
+			preview.fish_count,
+			fish_label,
 			_get_buyer_display_group(_default_buyer),
-			buyer_offer,
-			fish_catch.sale_value,
+			preview.payout,
+			preview.base_value,
 		]
 	)
 	_sale_confirmation.visible = true
@@ -763,31 +873,39 @@ func _on_confirm_sale_pressed() -> void:
 	if (
 		_sale_in_progress
 		or _sale_service == null
-		or _confirmation_catch_id.is_empty()
+		or _confirmation_catch_ids.is_empty()
 		or _confirmation_buyer == null
 		or _confirmation_buyer.id != _confirmation_buyer_id
+		or _confirmation_generation != _menu_generation
 	):
 		return
 	_sale_in_progress = true
-	var requested_catch_id: StringName = _confirmation_catch_id
+	var requested_catch_ids: Array[StringName] = (
+		_confirmation_catch_ids.duplicate()
+	)
+	var transaction_generation: int = _menu_generation
+	var transaction_buyer: FishBuyerProfileType = _confirmation_buyer
 	_confirm_sale_button.disabled = true
-	var result: FishSaleResultType = _sale_service.sell(
-		requested_catch_id,
-		_confirmation_buyer
+	var result: FishSaleResultType = _sale_service.sell_batch(
+		requested_catch_ids,
+		transaction_buyer
 	)
 	_close_sale_confirmation()
-	_transaction_feedback.text = result.get_message()
 	_sale_in_progress = false
-	if result.is_success() and _selected_catch_id == requested_catch_id:
-		_selected_catch_id = StringName()
+	if transaction_generation != _menu_generation or not visible:
+		return
+	_transaction_feedback.text = result.get_message()
+	if result.is_success():
+		_fish_selection.remove_ids(requested_catch_ids)
 	_refresh_all()
 	_inventory_tab.grab_focus()
 
 
 func _close_sale_confirmation() -> void:
-	_confirmation_catch_id = StringName()
+	_confirmation_catch_ids.clear()
 	_confirmation_buyer = null
 	_confirmation_buyer_id = StringName()
+	_confirmation_generation = -1
 	_sale_confirmation.visible = false
 	_confirmation_message.text = ""
 	_confirm_sale_button.disabled = false
@@ -796,25 +914,35 @@ func _close_sale_confirmation() -> void:
 func _revalidate_confirmation() -> void:
 	if not _sale_confirmation.visible:
 		return
-	var fish_catch: FishCatchType
-	if _inventory != null:
-		fish_catch = _inventory.get_catch_by_id(_confirmation_catch_id)
-	if fish_catch == null:
+	if (
+		_confirmation_generation != _menu_generation
+		or _confirmation_catch_ids.is_empty()
+		or _sale_service == null
+		or _confirmation_buyer == null
+		or _confirmation_buyer.id != _confirmation_buyer_id
+	):
 		_close_sale_confirmation()
-		_transaction_feedback.text = "Fish no longer exists."
-	elif fish_catch.is_favorited:
-		_close_sale_confirmation()
-		_transaction_feedback.text = "Favorited fish cannot be sold."
-	elif fish_catch.sale_value < 0:
-		_close_sale_confirmation()
-		_transaction_feedback.text = "Invalid sale value."
-	elif (
+		_transaction_feedback.text = "sale selection is no longer available."
+		return
+	var preview: FishSaleResultType = _sale_service.preview_batch(
+		_confirmation_catch_ids,
+		_confirmation_buyer
+	)
+	if (
+		not preview.is_success()
+		or (
 		_confirmation_buyer == null
 		or _confirmation_buyer.id != _confirmation_buyer_id
 		or not _confirmation_buyer.is_valid()
+		)
 	):
 		_close_sale_confirmation()
-		_transaction_feedback.text = "Buyer is unavailable."
+		_transaction_feedback.text = (
+			"favorited fish cannot be sold. "
+			+ "remove them from the selection first."
+			if preview.status == FishSaleResultType.Status.FAVORITED
+			else preview.get_message()
+		)
 
 
 func _get_buyer_display_group(
@@ -840,9 +968,9 @@ func _refresh_logbook() -> void:
 				valid_species.append(fish)
 	_logbook_empty.visible = valid_species.is_empty()
 	_logbook_empty.text = (
-		"No fish catalog configured."
+		"no fish catalog configured."
 		if valid_species.is_empty()
-		else "No species discovered yet."
+		else "no species discovered yet."
 	)
 	if not valid_species.is_empty() and _collection_log != null:
 		var any_discovered: bool = false
@@ -881,12 +1009,12 @@ func _create_logbook_card(fish: FishDataType) -> Control:
 		var owned_count: int = (
 			_inventory.get_count(fish.id) if _inventory != null else 0
 		)
-		details.text = "%s\nOwned: %d" % [
+		details.text = "%s\nowned: %d" % [
 			fish.get_rarity_name(),
 			owned_count,
 		]
 	else:
-		details.text = "Undiscovered"
+		details.text = "undiscovered"
 	details.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
 	content.add_child(details)
 	return card
@@ -904,7 +1032,7 @@ func _create_texture_frame(
 	texture_frame.texture_filter = CanvasItem.TEXTURE_FILTER_NEAREST
 	texture_frame.mouse_filter = Control.MOUSE_FILTER_IGNORE
 	if texture == null:
-		texture_frame.tooltip_text = "Display texture unavailable"
+		texture_frame.tooltip_text = "display texture unavailable"
 	return texture_frame
 
 

ui/player_menu.tscn

@@ -56,39 +56,39 @@ layout_mode = 2
 size_flags_horizontal = 3
 theme_override_colors/font_color = Color(0.208, 0.725, 0.78, 1)
 theme_override_font_sizes/font_size = 22
-text = "Player Menu"
+text = "player menu"
 
 [node name="WalletBalance" type="Label" parent="MenuPanel/Margin/Layout/Header"]
 unique_name_in_owner = true
 layout_mode = 2
-text = "Wallet: $0"
+text = "wallet: $0"
 theme_override_colors/font_color = Color(1, 0.82, 0.4, 1)
 
 [node name="InventoryTab" type="Button" parent="MenuPanel/Margin/Layout/Header"]
 unique_name_in_owner = true
 layout_mode = 2
 toggle_mode = true
-text = "Cooler"
+text = "cooler"
 custom_minimum_size = Vector2(88, 30)
 
 [node name="BagTab" type="Button" parent="MenuPanel/Margin/Layout/Header"]
 unique_name_in_owner = true
 layout_mode = 2
 toggle_mode = true
-text = "Bag"
+text = "bag"
 custom_minimum_size = Vector2(76, 30)
 
 [node name="LogbookTab" type="Button" parent="MenuPanel/Margin/Layout/Header"]
 unique_name_in_owner = true
 layout_mode = 2
 toggle_mode = true
-text = "Logbook"
+text = "logbook"
 custom_minimum_size = Vector2(88, 30)
 
 [node name="CloseButton" type="Button" parent="MenuPanel/Margin/Layout/Header"]
 unique_name_in_owner = true
 layout_mode = 2
-text = "Close"
+text = "close"
 custom_minimum_size = Vector2(68, 30)
 
 [node name="Separator" type="HSeparator" parent="MenuPanel/Margin/Layout"]
@@ -123,7 +123,7 @@ theme_override_constants/separation = 6
 
 [node name="SortLabel" type="Label" parent="MenuPanel/Margin/Layout/Content/InventorySection/SortBar"]
 layout_mode = 2
-text = "Sort:"
+text = "sort:"
 
 [node name="SortOption" type="OptionButton" parent="MenuPanel/Margin/Layout/Content/InventorySection/SortBar"]
 unique_name_in_owner = true
@@ -134,7 +134,7 @@ custom_minimum_size = Vector2(130, 30)
 unique_name_in_owner = true
 layout_mode = 2
 custom_minimum_size = Vector2(112, 30)
-text = "Newest first"
+text = "newest first"
 
 [node name="SortSpacer" type="Control" parent="MenuPanel/Margin/Layout/Content/InventorySection/SortBar"]
 layout_mode = 2
@@ -149,7 +149,7 @@ theme_override_colors/font_color = Color(0.208, 0.725, 0.78, 1)
 [node name="HeldValue" type="Label" parent="MenuPanel/Margin/Layout/Content/InventorySection/SortBar"]
 unique_name_in_owner = true
 layout_mode = 2
-text = "Held fish base value: $0"
+text = "held fish base value: $0"
 theme_override_colors/font_color = Color(0.682, 0.733, 0.761, 1)
 
 [node name="InventoryBody" type="HSplitContainer" parent="MenuPanel/Margin/Layout/Content/InventorySection"]
@@ -176,7 +176,7 @@ theme_override_constants/separation = 6
 [node name="InventoryEmpty" type="Label" parent="MenuPanel/Margin/Layout/Content/InventorySection/InventoryBody/InventoryList/InventoryListMargin/InventoryStack"]
 unique_name_in_owner = true
 layout_mode = 2
-text = "Your Cooler is empty."
+text = "your cooler is empty."
 horizontal_alignment = 1
 
 [node name="InventoryScroll" type="ScrollContainer" parent="MenuPanel/Margin/Layout/Content/InventorySection/InventoryBody/InventoryList/InventoryListMargin/InventoryStack"]
@@ -228,17 +228,25 @@ layout_mode = 2
 autowrap_mode = 2
 horizontal_alignment = 1
 
+[node name="SelectionSummary" type="Label" parent="MenuPanel/Margin/Layout/Content/InventorySection/InventoryBody/DetailPanel/DetailMargin/DetailStack"]
+unique_name_in_owner = true
+layout_mode = 2
+text = "no fish selected"
+autowrap_mode = 2
+horizontal_alignment = 1
+theme_override_colors/font_color = Color(0.208, 0.725, 0.78, 1)
+
 [node name="FavoriteButton" type="Button" parent="MenuPanel/Margin/Layout/Content/InventorySection/InventoryBody/DetailPanel/DetailMargin/DetailStack"]
 unique_name_in_owner = true
 layout_mode = 2
 disabled = true
-text = "Favorite"
+text = "favorite"
 
 [node name="SellButton" type="Button" parent="MenuPanel/Margin/Layout/Content/InventorySection/InventoryBody/DetailPanel/DetailMargin/DetailStack"]
 unique_name_in_owner = true
 layout_mode = 2
 disabled = true
-text = "Sell"
+text = "sell"
 theme_type_variation = &"DangerButton"
 
 [node name="SaleUnavailable" type="Label" parent="MenuPanel/Margin/Layout/Content/InventorySection/InventoryBody/DetailPanel/DetailMargin/DetailStack"]
@@ -262,7 +270,7 @@ theme_override_constants/separation = 7
 
 [node name="BagHint" type="Label" parent="MenuPanel/Margin/Layout/Content/BagSection"]
 layout_mode = 2
-text = "Drag hotbar-compatible items onto a slot below. Right-click a slot to clear it."
+text = "drag hotbar-compatible items onto a slot below. right-click a slot to clear it."
 horizontal_alignment = 1
 
 [node name="BagBody" type="HSplitContainer" parent="MenuPanel/Margin/Layout/Content/BagSection"]
@@ -289,7 +297,7 @@ theme_override_constants/separation = 6
 [node name="BagEmpty" type="Label" parent="MenuPanel/Margin/Layout/Content/BagSection/BagBody/BagList/Margin/Stack"]
 unique_name_in_owner = true
 layout_mode = 2
-text = "Your Bag is empty."
+text = "your bag is empty."
 horizontal_alignment = 1
 
 [node name="BagScroll" type="ScrollContainer" parent="MenuPanel/Margin/Layout/Content/BagSection/BagBody/BagList/Margin/Stack"]
@@ -337,7 +345,7 @@ horizontal_alignment = 1
 [node name="BagDetailData" type="Label" parent="MenuPanel/Margin/Layout/Content/BagSection/BagBody/BagDetail/Margin/Stack"]
 unique_name_in_owner = true
 layout_mode = 2
-text = "Select a Bag item for details."
+text = "select a bag item for details."
 horizontal_alignment = 1
 autowrap_mode = 2
 
@@ -355,7 +363,7 @@ theme_override_constants/separation = 7
 [node name="LogbookEmpty" type="Label" parent="MenuPanel/Margin/Layout/Content/LogbookSection"]
 unique_name_in_owner = true
 layout_mode = 2
-text = "No species discovered yet."
+text = "no species discovered yet."
 horizontal_alignment = 1
 
 [node name="LogbookScroll" type="ScrollContainer" parent="MenuPanel/Margin/Layout/Content/LogbookSection"]
@@ -412,12 +420,12 @@ alignment = 1
 [node name="ConfirmSaleButton" type="Button" parent="MenuPanel/Margin/Layout/Content/SaleConfirmation/ConfirmationMargin/ConfirmationLayout/ConfirmationButtons"]
 unique_name_in_owner = true
 layout_mode = 2
-text = "Confirm"
+text = "confirm"
 theme_type_variation = &"DangerButton"
 custom_minimum_size = Vector2(120, 38)
 
 [node name="CancelSaleButton" type="Button" parent="MenuPanel/Margin/Layout/Content/SaleConfirmation/ConfirmationMargin/ConfirmationLayout/ConfirmationButtons"]
 unique_name_in_owner = true
 layout_mode = 2
-text = "Cancel"
+text = "cancel"
 custom_minimum_size = Vector2(120, 38)