diff --git a/components/selectable_container.tscn b/components/selectable_container.tscn
new file mode 100644
index 0000000..74b621f
--- /dev/null
+++ b/components/selectable_container.tscn
@@ -0,0 +1,54 @@
+[gd_scene format=3 uid="uid://s7f003dyd60i"]
+
+[ext_resource type="Script" uid="uid://cxerh1gbkrop2" path="res://scripts/selectable_container.gd" id="1_focus"]
+
+[sub_resource type="LabelSettings" id="LabelSettings_0fpm5"]
+font_size = 24
+
+[node name="SelectableContainer" type="MarginContainer" unique_id=903061831]
+anchors_preset = -1
+anchor_right = 1.0
+anchor_bottom = 1.0
+offset_left = 4.0
+offset_top = 4.0
+offset_right = -4.0
+offset_bottom = -4.0
+grow_horizontal = 2
+grow_vertical = 2
+script = ExtResource("1_focus")
+
+[node name="PanelContainer" type="PanelContainer" parent="." unique_id=555833581]
+layout_mode = 2
+
+[node name="MarginContainer" type="MarginContainer" parent="." unique_id=701103853]
+layout_mode = 2
+theme_override_constants/margin_left = 16
+theme_override_constants/margin_top = 16
+theme_override_constants/margin_right = 16
+theme_override_constants/margin_bottom = 16
+
+[node name="VBoxContainer" type="VBoxContainer" parent="MarginContainer" unique_id=1200250605]
+layout_mode = 2
+
+[node name="HBoxContainer" type="HBoxContainer" parent="MarginContainer/VBoxContainer" unique_id=157590431]
+layout_mode = 2
+size_flags_vertical = 0
+
+[node name="Label" type="Label" parent="MarginContainer/VBoxContainer/HBoxContainer" unique_id=1765103253]
+layout_mode = 2
+size_flags_horizontal = 0
+size_flags_vertical = 1
+text = "Panel"
+label_settings = SubResource("LabelSettings_0fpm5")
+
+[node name="Button" type="Button" parent="MarginContainer/VBoxContainer/HBoxContainer" unique_id=519793654]
+layout_mode = 2
+size_flags_horizontal = 10
+text = "F1"
+
+[node name="HSeparator" type="HSeparator" parent="MarginContainer/VBoxContainer" unique_id=1046926303]
+layout_mode = 2
+
+[node name="Content" type="VBoxContainer" parent="MarginContainer/VBoxContainer" unique_id=1706387279]
+layout_mode = 2
+size_flags_vertical = 3
diff --git a/components/terminal_panel.tscn b/components/terminal_panel.tscn
new file mode 100644
index 0000000..0c380e0
--- /dev/null
+++ b/components/terminal_panel.tscn
@@ -0,0 +1,26 @@
+[gd_scene format=3 uid="uid://chflnxm5486kc"]
+
+[ext_resource type="PackedScene" uid="uid://s7f003dyd60i" path="res://components/selectable_container.tscn" id="1_panel"]
+[ext_resource type="Script" uid="uid://cjghwf3b858xu" path="res://scripts/terminal_panel.gd" id="2_terminal"]
+
+[node name="TerminalPanel" unique_id=690518475 instance=ExtResource("1_panel")]
+script = ExtResource("2_terminal")
+title = "ROV terminal"
+initial_focus = NodePath("Command")
+
+[node name="Label" parent="MarginContainer/VBoxContainer/HBoxContainer" parent_id_path=PackedInt32Array(157590431) index="0" unique_id=1765103253]
+text = "ROV terminal"
+
+[node name="Output" type="RichTextLabel" parent="." index="2" unique_id=1341181181]
+custom_minimum_size = Vector2(260, 100)
+layout_mode = 2
+size_flags_vertical = 3
+focus_mode = 2
+text = "SSH transport not connected.
+Press the panel shortcut, then type a command.
+"
+scroll_following = true
+
+[node name="Command" type="LineEdit" parent="." index="3" unique_id=701067863]
+layout_mode = 2
+placeholder_text = "Enter command…"
diff --git a/project.godot b/project.godot
index 555a0de..65e9a95 100644
--- a/project.godot
+++ b/project.godot
@@ -11,8 +11,7 @@ config_version=5
 [application]
 
 config/name="SurfaceSide-UI"
-run/main_scene="uid://63m7uewe6luk"
-config/features=PackedStringArray("4.6", "Forward Plus")
+config/features=PackedStringArray("4.7", "Forward Plus")
 config/icon="res://icon.svg"
 
 [display]
@@ -21,6 +20,10 @@ window/size/mode=2
 window/subwindows/embed_subwindows=false
 window/vsync/vsync_mode=3
 
+[gui]
+
+theme/custom="res://themes/theme.tres"
+
 [physics]
 
 3d/physics_engine="Jolt Physics"
@@ -28,3 +31,4 @@ window/vsync/vsync_mode=3
 [rendering]
 
 rendering_device/driver.windows="d3d12"
+environment/defaults/default_clear_color=Color(0.067, 0.055, 0.067, 1)
diff --git a/scripts/selectable_container.gd b/scripts/selectable_container.gd
new file mode 100644
index 0000000..4aaaeec
--- /dev/null
+++ b/scripts/selectable_container.gd
@@ -0,0 +1,152 @@
+@tool
+class_name SelectableContainer
+extends MarginContainer
+
+signal activated
+signal deactivated
+
+@export var title: String = "Panel":
+	set(value):
+		title = value
+		_refresh_header()
+@export var focus_key: Key = KEY_F1:
+	set(value):
+		focus_key = value
+		_refresh_header()
+@export_node_path("Control") var initial_focus: NodePath
+
+var is_active: bool = false
+var _last_focus: Control
+var _shortcut_available: bool = true
+var _initial_focus_control: Control
+@onready var content: VBoxContainer = $MarginContainer/VBoxContainer/Content
+@onready var _panel: PanelContainer = $PanelContainer
+@onready var _shortcut: Button = $MarginContainer/VBoxContainer/HBoxContainer/Button
+
+func _ready() -> void:
+	_refresh_header()
+	if Engine.is_editor_hint():
+		return
+	# Resolve authored paths before reparenting changes the runtime hierarchy.
+	_initial_focus_control = get_node_or_null(initial_focus) as Control
+	for child in get_children():
+		_route_content_child(child)
+	child_entered_tree.connect(_on_child_entered_tree)
+	add_to_group("keyboard_focus_containers")
+	focus_mode = Control.FOCUS_NONE
+	_shortcut.focus_mode = Control.FOCUS_NONE
+	_shortcut.pressed.connect(activate)
+	for other in get_tree().get_nodes_in_group("keyboard_focus_containers"):
+		if other != self and other.get_viewport() == get_viewport() and other.focus_key == focus_key and other._shortcut_available:
+			_shortcut_available = false
+			_shortcut.disabled = true
+			_shortcut.tooltip_text = "Shortcut already assigned to " + other.title
+			push_warning("Duplicate panel shortcut: " + OS.get_keycode_string(focus_key))
+			break
+	get_viewport().gui_focus_changed.connect(_on_focus_changed)
+	visibility_changed.connect(_on_visibility_changed)
+	_update_style()
+	content.focus_behavior_recursive = Control.FOCUS_BEHAVIOR_DISABLED
+
+func _refresh_header() -> void:
+	var label := get_node_or_null("MarginContainer/VBoxContainer/HBoxContainer/Label") as Label
+	var badge := get_node_or_null("MarginContainer/VBoxContainer/HBoxContainer/Button") as Button
+	if label != null:
+		label.text = title
+	if badge != null:
+		badge.text = OS.get_keycode_string(focus_key) + (" · ACTIVE" if is_active else "")
+
+func _on_child_entered_tree(child: Node) -> void:
+	# SceneTree may still be adding the node when this signal fires.
+	_route_content_child.call_deferred(child)
+
+func _route_content_child(child: Node) -> void:
+	if not is_instance_valid(child) or child.get_parent() != self:
+		return
+	if child == _panel or child == $MarginContainer:
+		return
+	child.reparent(content, false)
+
+func activate() -> void:
+	if Engine.is_editor_hint() or not is_visible_in_tree() or not _shortcut_available:
+		return
+	for other in get_tree().get_nodes_in_group("keyboard_focus_containers"):
+		if other != self and other.get_viewport() == get_viewport():
+			other.deactivate()
+	var was_active := is_active
+	is_active = true
+	focus_mode = Control.FOCUS_ALL
+	content.focus_behavior_recursive = Control.FOCUS_BEHAVIOR_ENABLED
+	_update_style()
+	var target: Control = _initial_focus_control if is_instance_valid(_initial_focus_control) else null
+	if is_instance_valid(_last_focus) and _last_focus.is_visible_in_tree():
+		target = _last_focus
+	if target != null and target.is_visible_in_tree() and target.get_focus_mode_with_override() != Control.FOCUS_NONE:
+		target.grab_focus()
+	else:
+		var controls := _focusable_controls(content)
+		if controls.is_empty():
+			grab_focus()
+		else:
+			controls[0].grab_focus()
+	if not was_active:
+		activated.emit()
+
+func deactivate() -> void:
+	if not is_active:
+		return
+	is_active = false
+	focus_mode = Control.FOCUS_NONE
+	var focus_owner := get_viewport().gui_get_focus_owner()
+	if focus_owner == self or (focus_owner != null and is_ancestor_of(focus_owner)):
+		focus_owner.release_focus()
+	content.focus_behavior_recursive = Control.FOCUS_BEHAVIOR_DISABLED
+	_update_style()
+	deactivated.emit()
+
+func _input(event: InputEvent) -> void:
+	if Engine.is_editor_hint() or not event is InputEventKey or not is_visible_in_tree():
+		return
+	var key := event as InputEventKey
+	if key.keycode == focus_key and not key.alt_pressed and not key.ctrl_pressed and not key.meta_pressed and not key.shift_pressed and _shortcut_available:
+		# Consume releases and repeats as well, so shortcuts never become input.
+		get_viewport().set_input_as_handled()
+		if key.pressed and not key.echo:
+			activate()
+		return
+	if not is_active or not key.pressed:
+		return
+	if key.keycode == KEY_ESCAPE:
+		deactivate()
+		get_viewport().set_input_as_handled()
+	elif key.keycode == KEY_TAB and not key.ctrl_pressed and not key.alt_pressed and not key.meta_pressed:
+		var controls := _focusable_controls(content)
+		if not controls.is_empty():
+			var index := controls.find(get_viewport().gui_get_focus_owner())
+			var step := -1 if key.shift_pressed else 1
+			controls[posmod(index + step, controls.size())].grab_focus()
+		get_viewport().set_input_as_handled()
+
+func _focusable_controls(node: Node) -> Array[Control]:
+	var result: Array[Control] = []
+	for child in node.get_children():
+		if child is Control and child.is_visible_in_tree() and child.get_focus_mode_with_override() == Control.FOCUS_ALL:
+			if not (child is BaseButton and child.disabled):
+				result.append(child)
+		result.append_array(_focusable_controls(child))
+	return result
+
+func _on_focus_changed(control: Control) -> void:
+	if is_active and control != null and is_ancestor_of(control):
+		_last_focus = control
+	elif is_active and control != self:
+		deactivate()
+
+func _on_visibility_changed() -> void:
+	if not is_visible_in_tree():
+		deactivate()
+
+func _update_style() -> void:
+	var style_name := "panel_active" if is_active else "panel_inactive"
+	_panel.add_theme_stylebox_override("panel", get_theme_stylebox(style_name, "SurfaceSide"))
+	_refresh_header()
diff --git a/scripts/selectable_container.gd.uid b/scripts/selectable_container.gd.uid
new file mode 100644
index 0000000..136a7f5
--- /dev/null
+++ b/scripts/selectable_container.gd.uid
@@ -0,0 +1 @@
+uid://cxerh1gbkrop2
diff --git a/scripts/terminal_panel.gd b/scripts/terminal_panel.gd
new file mode 100644
index 0000000..6f9de52
--- /dev/null
+++ b/scripts/terminal_panel.gd
@@ -0,0 +1,25 @@
+@tool
+extends SelectableContainer
+signal command_requested(command: String)
+
+@onready var output: RichTextLabel = $Output
+@onready var command_input: LineEdit = $Command
+
+func _ready() -> void:
+	super._ready()
+	if Engine.is_editor_hint():
+		return
+	command_input.text_submitted.connect(_submit)
+
+func _submit(command: String) -> void:
+	if command.strip_edges().is_empty():
+		return
+	append_output("$ " + command + "\n")
+	command_input.clear()
+	if command_requested.get_connections().is_empty():
+		append_output("No SSH transport connected. Command was not sent.\n")
+	else:
+		command_requested.emit(command)
+
+func append_output(text: String) -> void:
+	output.add_text(text)
diff --git a/scripts/terminal_panel.gd.uid b/scripts/terminal_panel.gd.uid
new file mode 100644
index 0000000..9bc9fbe
--- /dev/null
+++ b/scripts/terminal_panel.gd.uid
@@ -0,0 +1 @@
+uid://cjghwf3b858xu