diff --git a/sandbox/basic.css b/sandbox/basic.css
index 3a4c2619e..8bcb7ee79 100644
--- a/sandbox/basic.css
+++ b/sandbox/basic.css
@@ -58,7 +58,7 @@ App > Screen {
 #header {
   color: $text-primary-darken-1;
   background: $primary-darken-1;
-  height: 3;
+  height: 3
 
 }
 
@@ -74,9 +74,9 @@ App > Screen {
 Tweet {
   height: 22;
   max-width: 80;
-  margin: 1 3;
+  margin: 1 3;  
   background: $panel;
-  color: $text-panel
+  color: $text-panel;
   layout: vertical;
   /* border: outer $primary; */
   padding: 1;
diff --git a/src/textual/app.py b/src/textual/app.py
index 02040bae4..c710ac5ee 100644
--- a/src/textual/app.py
+++ b/src/textual/app.py
@@ -4,6 +4,7 @@ import asyncio
 import inspect
 import os
 import platform
+from time import perf_counter
 import warnings
 from asyncio import AbstractEventLoop
 from pathlib import Path
@@ -29,7 +30,7 @@ from ._callback import invoke
 from ._context import active_app
 from ._event_broker import extract_handler_actions, NoHandler
 from .binding import Bindings, NoBinding
-from .css.stylesheet import Stylesheet, StylesheetParseError, StylesheetError
+from .css.stylesheet import Stylesheet
 from .devtools.client import DevtoolsClient, DevtoolsConnectionError
 from .design import ColorSystem
 from .dom import DOMNode
@@ -102,6 +103,7 @@ class App(DOMNode):
         """
         self.console = Console(markup=False, highlight=False)
         self.error_console = Console(markup=False, stderr=True)
+
         self._screen = screen
         self.driver_class = driver_class or self.get_driver_class()
         self._title = title
@@ -121,7 +123,16 @@ class App(DOMNode):
         self.bindings = Bindings()
         self._title = title
 
-        self.log_file = open(log, "wt") if log else None
+        self._log_console: Console | None = None
+        if log:
+            self.log_file = open(log, "wt")
+            self._log_console = Console(
+                file=self.log_file, markup=False, emoji=False, highlight=False
+            )
+        else:
+            self._log_console = None
+            self._log_file = None
+
         self.log_verbosity = log_verbosity
 
         self.bindings.bind("ctrl+c", "quit", show=False, allow_forward=False)
@@ -219,30 +230,36 @@ class App(DOMNode):
             _textual_calling_frame (inspect.FrameInfo | None): The frame info to include in
                 the log message sent to the devtools server.
         """
-        output = ""
+        if verbosity > self.log_verbosity:
+            return
+
         try:
-            output = f" ".join(str(arg) for arg in objects)
-            if kwargs:
-                key_values = " ".join(f"{key}={value}" for key, value in kwargs.items())
-                output = " ".join((output, key_values))
-
-            if not _textual_calling_frame:
-                _textual_calling_frame = inspect.stack()[1]
-
-            calling_path = _textual_calling_frame.filename
-            calling_lineno = _textual_calling_frame.lineno
-
-            if self.devtools.is_connected and verbosity <= self.log_verbosity:
-                if len(objects) > 1 or len(kwargs) >= 1 and output:
-                    self.devtools.log(output, path=calling_path, lineno=calling_lineno)
-                else:
+            if len(objects) == 1:
+                if self._log_console is not None:
+                    self._log_console.print(objects[0])
+                if self.devtools.is_connected:
+                    if not _textual_calling_frame:
+                        _textual_calling_frame = inspect.stack()[1]
+                    calling_path = _textual_calling_frame.filename
+                    calling_lineno = _textual_calling_frame.lineno
                     self.devtools.log(
-                        *objects, path=calling_path, lineno=calling_lineno
+                        objects[0], path=calling_path, lineno=calling_lineno
                     )
-
-            if self.log_file and verbosity <= self.log_verbosity:
-                self.log_file.write(output + "\n")
-                self.log_file.flush()
+            else:
+                output = f" ".join(str(arg) for arg in objects)
+                if kwargs:
+                    key_values = " ".join(
+                        f"{key}={value}" for key, value in kwargs.items()
+                    )
+                    output = " ".join((output, key_values))
+                if self._log_console is not None:
+                    self._log_console.print(output, soft_wrap=True)
+                if self.devtools.is_connected:
+                    if not _textual_calling_frame:
+                        _textual_calling_frame = inspect.stack()[1]
+                    calling_path = _textual_calling_frame.filename
+                    calling_lineno = _textual_calling_frame.lineno
+                    self.devtools.log(output, path=calling_path, lineno=calling_lineno)
         except Exception:
             pass
 
@@ -310,11 +327,13 @@ class App(DOMNode):
         if self.css_file is not None:
             stylesheet = Stylesheet(variables=self.get_css_variables())
             try:
-                self.log("loading", self.css_file)
+                time = perf_counter()
                 stylesheet.read(self.css_file)
-            except StylesheetError as error:
-                self.log(error)
+                elapsed = (perf_counter() - time) * 1000
+                self.log(f"loaded {self.css_file} in {elapsed:.0f}ms")
+            except Exception as error:
                 self.console.bell()
+                self.log(error)
             else:
                 self.reset_styles()
                 self.stylesheet = stylesheet
diff --git a/src/textual/css/_styles_builder.py b/src/textual/css/_styles_builder.py
index 9e85c106f..63627025d 100644
--- a/src/textual/css/_styles_builder.py
+++ b/src/textual/css/_styles_builder.py
@@ -275,8 +275,8 @@ class StylesBuilder:
         space: list[int] = []
         append = space.append
         for token in tokens:
-            token_name, value, _, _, location, _ = token
-            if token_name in ("number", "scalar"):
+            token_name, value, _, _, _, _ = token
+            if token_name == "number":
                 try:
                     append(int(value))
                 except ValueError:
@@ -289,12 +289,44 @@ class StylesBuilder:
             )
         self.styles._rules[name] = Spacing.unpack(cast(SpacingDimensions, tuple(space)))
 
+    def _process_space_partial(self, name: str, tokens: list[Token]) -> None:
+        if len(tokens) != 1:
+            self.error(name, tokens[0], "expected a single token here")
+
+        _EDGE_SPACING_MAP = {"top": 0, "right": 1, "bottom": 2, "left": 3}
+        token = tokens[0]
+        token_name, value, _, _, _, _ = token
+        if token_name == "number":
+            space = int(value)
+        else:
+            self.error(name, token, f"expected a number here; found {value!r}")
+        style_name, _, edge = name.replace("-", "_").partition("_")
+
+        current_spacing = cast(
+            tuple[int, int, int, int], self.styles._rules.get(style_name, (0, 0, 0, 0))
+        )
+
+        spacing_list = list(current_spacing)
+        spacing_list[_EDGE_SPACING_MAP[edge]] = space
+
+        self.styles._rules[style_name] = Spacing(*spacing_list)
+
     def process_padding(self, name: str, tokens: list[Token]) -> None:
         self._process_space(name, tokens)
 
     def process_margin(self, name: str, tokens: list[Token]) -> None:
         self._process_space(name, tokens)
 
+    process_margin_top = _process_space_partial
+    process_margin_right = _process_space_partial
+    process_margin_bottom = _process_space_partial
+    process_margin_left = _process_space_partial
+
+    process_padding_top = _process_space_partial
+    process_padding_right = _process_space_partial
+    process_padding_bottom = _process_space_partial
+    process_padding_left = _process_space_partial
+
     def _parse_border(self, name: str, tokens: list[Token]) -> tuple[str, Color]:
         border_type = "solid"
         border_color = Color(0, 255, 0)
diff --git a/src/textual/css/stylesheet.py b/src/textual/css/stylesheet.py
index 6703c71c8..8ff1382e9 100644
--- a/src/textual/css/stylesheet.py
+++ b/src/textual/css/stylesheet.py
@@ -28,7 +28,7 @@ from ..dom import DOMNode
 from .. import log
 
 
-class StylesheetParseError(Exception):
+class StylesheetParseError(StylesheetError):
     def __init__(self, errors: StylesheetErrors) -> None:
         self.errors = errors
 
diff --git a/src/textual/events.py b/src/textual/events.py
index 6f9ef9fa9..5525a123a 100644
--- a/src/textual/events.py
+++ b/src/textual/events.py
@@ -202,7 +202,7 @@ class Key(InputEvent):
 
 
 @rich.repr.auto
-class MouseEvent(InputEvent, bubble=True):
+class MouseEvent(InputEvent, bubble=True, verbosity=2):
     """Sent in response to a mouse event"""
 
     __slots__ = [
@@ -344,7 +344,7 @@ class MouseScrollDown(InputEvent, verbosity=3, bubble=True):
         self.y = y
 
 
-class MouseScrollUp(MouseScrollDown, bubble=True):
+class MouseScrollUp(MouseScrollDown, verbosity=3, bubble=True):
     pass
 
 
diff --git a/src/textual/screen.py b/src/textual/screen.py
index 96b0825d0..bdc2002ef 100644
--- a/src/textual/screen.py
+++ b/src/textual/screen.py
@@ -91,7 +91,7 @@ class Screen(Widget):
     def on_idle(self, event: events.Idle) -> None:
         # Check for any widgets marked as 'dirty' (needs a repaint)
         if self._dirty_widgets:
-            self.log(dirty=len(self._dirty_widgets))
+            # self.log(dirty=len(self._dirty_widgets))
             for widget in self._dirty_widgets:
                 # Repaint widgets
                 # TODO: Combine these in to a single update.