diff --git a/engine/app.py b/engine/app.py
index 98cddd1..a504122 100644
--- a/engine/app.py
+++ b/engine/app.py
@@ -2,23 +2,33 @@
 Application orchestrator — boot sequence, signal handling, main loop wiring.
 """
 
-import sys
-import os
-import time
-import signal
 import atexit
+import os
+import signal
+import sys
 import termios
+import time
 import tty
 
 from engine import config, render
-from engine.terminal import (
-    RST, G_HI, G_MID, G_DIM, W_DIM, W_GHOST, CLR, CURSOR_OFF, CURSOR_ON, tw,
-    slow_print, boot_ln,
-)
 from engine.fetch import fetch_all, fetch_poetry, load_cache, save_cache
-from engine.ntfy import NtfyPoller
 from engine.mic import MicMonitor
+from engine.ntfy import NtfyPoller
 from engine.scroll import stream
+from engine.terminal import (
+    CLR,
+    CURSOR_OFF,
+    CURSOR_ON,
+    G_DIM,
+    G_HI,
+    G_MID,
+    RST,
+    W_DIM,
+    W_GHOST,
+    boot_ln,
+    slow_print,
+    tw,
+)
 
 TITLE = [
     "  ███╗   ███╗ █████╗ ██╗███╗   ██╗██╗     ██╗███╗   ██╗███████╗",
diff --git a/engine/config.py b/engine/config.py
index f509b23..3f2caea 100644
--- a/engine/config.py
+++ b/engine/config.py
@@ -3,8 +3,8 @@ Configuration constants, CLI flags, and glyph tables.
 """
 
 import sys
-
 from pathlib import Path
+
 _REPO_ROOT = Path(__file__).resolve().parent.parent
 _FONT_EXTENSIONS = {".otf", ".ttf", ".ttc"}
 
diff --git a/engine/effects.py b/engine/effects.py
index bad95de..3edb265 100644
--- a/engine/effects.py
+++ b/engine/effects.py
@@ -7,8 +7,8 @@ import random
 from datetime import datetime
 
 from engine import config
-from engine.terminal import RST, DIM, G_LO, G_DIM, W_GHOST, C_DIM
 from engine.sources import FEEDS, POETRY_SOURCES
+from engine.terminal import C_DIM, DIM, G_DIM, G_LO, RST, W_GHOST
 
 
 def noise(w):
diff --git a/engine/fetch.py b/engine/fetch.py
index 906a8b3..1c55861 100644
--- a/engine/fetch.py
+++ b/engine/fetch.py
@@ -3,19 +3,20 @@ RSS feed fetching, Project Gutenberg parsing, and headline caching.
 Depends on: config, sources, filter, terminal.
 """
 
-import re
 import json
 import pathlib
+import re
 import urllib.request
 from datetime import datetime
 
 import feedparser
 
 from engine import config
+from engine.filter import skip, strip_tags
 from engine.sources import FEEDS, POETRY_SOURCES
-from engine.filter import strip_tags, skip
 from engine.terminal import boot_ln
 
+
 # ─── SINGLE FEED ──────────────────────────────────────────
 def fetch_feed(url):
     try:
diff --git a/engine/mic.py b/engine/mic.py
index ffa6fa5..7d09740 100644
--- a/engine/mic.py
+++ b/engine/mic.py
@@ -6,8 +6,8 @@ Gracefully degrades if sounddevice/numpy are unavailable.
 import atexit
 
 try:
-    import sounddevice as _sd
     import numpy as _np
+    import sounddevice as _sd
     _HAS_MIC = True
 except Exception:
     _HAS_MIC = False
diff --git a/engine/ntfy.py b/engine/ntfy.py
index 25dd6a5..777c225 100644
--- a/engine/ntfy.py
+++ b/engine/ntfy.py
@@ -13,8 +13,8 @@ Reusable by any visualizer:
 """
 
 import json
-import time
 import threading
+import time
 import urllib.request
 
 
diff --git a/engine/render.py b/engine/render.py
index 1ef5adf..3025601 100644
--- a/engine/render.py
+++ b/engine/render.py
@@ -4,15 +4,15 @@ Font loading, text rasterization, word-wrap, gradient coloring, headline block a
 Depends on: config, terminal, sources, translate.
 """
 
-import re
 import random
+import re
 from pathlib import Path
 
 from PIL import Image, ImageDraw, ImageFont
 
 from engine import config
+from engine.sources import NO_UPPER, SCRIPT_FONTS, SOURCE_LANGS
 from engine.terminal import RST
-from engine.sources import SCRIPT_FONTS, SOURCE_LANGS, NO_UPPER
 from engine.translate import detect_location_language, translate_headline
 
 # ─── GRADIENT ─────────────────────────────────────────────
@@ -62,7 +62,7 @@ def font():
             f"No primary font selected. Add .otf/.ttf/.ttc files to {config.FONT_DIR}."
         )
     key = (config.FONT_PATH, config.FONT_INDEX, config.FONT_SZ)
-    if _FONT_OBJ is None or _FONT_OBJ_KEY != key:
+    if _FONT_OBJ is None or key != _FONT_OBJ_KEY:
         _FONT_OBJ = ImageFont.truetype(
             config.FONT_PATH, config.FONT_SZ, index=config.FONT_INDEX
         )
diff --git a/engine/scroll.py b/engine/scroll.py
index f9b7f39..d5e815c 100644
--- a/engine/scroll.py
+++ b/engine/scroll.py
@@ -3,16 +3,23 @@ Render engine — ticker content, scroll motion, message panel, and firehose ove
 Depends on: config, terminal, render, effects, ntfy, mic.
 """
 
+import random
 import re
 import sys
 import time
-import random
 from datetime import datetime
 
 from engine import config
-from engine.terminal import RST, W_COOL, CLR, tw, th
+from engine.effects import (
+    fade_line,
+    firehose_line,
+    glitch_bar,
+    next_headline,
+    noise,
+    vis_trunc,
+)
 from engine.render import big_wrap, lr_gradient, lr_gradient_opposite, make_block
-from engine.effects import noise, glitch_bar, fade_line, vis_trunc, next_headline, firehose_line
+from engine.terminal import CLR, RST, W_COOL, th, tw
 
 
 def stream(items, ntfy_poller, mic_monitor):
diff --git a/engine/terminal.py b/engine/terminal.py
index 8ca7112..4194e5e 100644
--- a/engine/terminal.py
+++ b/engine/terminal.py
@@ -4,8 +4,8 @@ No internal dependencies.
 """
 
 import os
-import sys
 import random
+import sys
 import time
 
 # ─── ANSI ─────────────────────────────────────────────────
diff --git a/engine/translate.py b/engine/translate.py
index 57bb795..ab4c273 100644
--- a/engine/translate.py
+++ b/engine/translate.py
@@ -3,10 +3,10 @@ Google Translate wrapper and location→language detection.
 Depends on: sources (for LOCATION_LANGS).
 """
 
-import re
 import json
-import urllib.request
+import re
 import urllib.parse
+import urllib.request
 
 from engine.sources import LOCATION_LANGS
 
diff --git a/tests/test_terminal.py b/tests/test_terminal.py
index 3216b87..766d9fa 100644
--- a/tests/test_terminal.py
+++ b/tests/test_terminal.py
@@ -14,21 +14,25 @@ class TestTerminalDimensions:
 
     def test_tw_returns_columns(self):
         """tw() returns terminal width."""
-        with patch.object(sys.stdout, "isatty", return_value=True):
-            with patch("os.get_terminal_size") as mock_size:
-                mock_size.return_value = io.StringIO("columns=120")
-                mock_size.columns = 120
-                result = terminal.tw()
-                assert isinstance(result, int)
+        with (
+            patch.object(sys.stdout, "isatty", return_value=True),
+            patch("os.get_terminal_size") as mock_size,
+        ):
+            mock_size.return_value = io.StringIO("columns=120")
+            mock_size.columns = 120
+            result = terminal.tw()
+            assert isinstance(result, int)
 
     def test_th_returns_lines(self):
         """th() returns terminal height."""
-        with patch.object(sys.stdout, "isatty", return_value=True):
-            with patch("os.get_terminal_size") as mock_size:
-                mock_size.return_value = io.StringIO("lines=30")
-                mock_size.lines = 30
-                result = terminal.th()
-                assert isinstance(result, int)
+        with (
+            patch.object(sys.stdout, "isatty", return_value=True),
+            patch("os.get_terminal_size") as mock_size,
+        ):
+            mock_size.return_value = io.StringIO("lines=30")
+            mock_size.lines = 30
+            result = terminal.th()
+            assert isinstance(result, int)
 
     def test_tw_fallback_on_error(self):
         """tw() falls back to 80 on error."""
@@ -84,9 +88,11 @@ class TestTypeOut:
     @patch("time.sleep")
     def test_type_out_uses_color(self, mock_sleep):
         """type_out applies color codes."""
-        with patch("sys.stdout", new_callable=io.StringIO):
-            with patch("random.random", return_value=0.5):
-                terminal.type_out("Test", color=terminal.G_HI)
+        with (
+            patch("sys.stdout", new_callable=io.StringIO),
+            patch("random.random", return_value=0.5),
+        ):
+            terminal.type_out("Test", color=terminal.G_HI)
 
 
 class TestSlowPrint: