diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index 26b4ca90..b842e7fe 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -77,7 +77,7 @@ jobs:
 
       - run: |
           mk python-release owner=vkottler \
-                            repo=runtimepy version=5.7.0
+                            repo=runtimepy version=5.7.1
         if: |
           matrix.python-version == '3.12'
           && matrix.system == 'ubuntu-latest'
diff --git a/README.md b/README.md
index 5d961535..853791e3 100644
--- a/README.md
+++ b/README.md
@@ -2,11 +2,11 @@
     =====================================
     generator=datazen
     version=3.1.4
-    hash=aa59dcef7f11c767458b14ad97f9de59
+    hash=8247340c8c4e6982a54b831c311f2c0b
     =====================================
 -->
 
-# runtimepy ([5.7.0](https://pypi.org/project/runtimepy/))
+# runtimepy ([5.7.1](https://pypi.org/project/runtimepy/))
 
 [![python](https://img.shields.io/pypi/pyversions/runtimepy.svg)](https://pypi.org/project/runtimepy/)
 ![Build Status](https://github.com/vkottler/runtimepy/workflows/Python%20Package/badge.svg)
diff --git a/local/variables/package.yaml b/local/variables/package.yaml
index eac174f6..1c564ee1 100644
--- a/local/variables/package.yaml
+++ b/local/variables/package.yaml
@@ -1,5 +1,5 @@
 ---
 major: 5
 minor: 7
-patch: 0
+patch: 1
 entry: runtimepy
diff --git a/pyproject.toml b/pyproject.toml
index 085ef1e7..97d30c6c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta:__legacy__"
 
 [project]
 name = "runtimepy"
-version = "5.7.0"
+version = "5.7.1"
 description = "A framework for implementing Python services."
 readme = "README.md"
 requires-python = ">=3.11"
diff --git a/runtimepy/__init__.py b/runtimepy/__init__.py
index 9ac1236c..25ce4a06 100644
--- a/runtimepy/__init__.py
+++ b/runtimepy/__init__.py
@@ -1,7 +1,7 @@
 # =====================================
 # generator=datazen
 # version=3.1.4
-# hash=c51f4ac6cf134b3c3fa872a096e83489
+# hash=405585c0fbfcc966ef193f744f21fa59
 # =====================================
 
 """
@@ -10,7 +10,7 @@
 
 DESCRIPTION = "A framework for implementing Python services."
 PKG_NAME = "runtimepy"
-VERSION = "5.7.0"
+VERSION = "5.7.1"
 
 # runtimepy-specific content.
 METRICS_NAME = "metrics"
diff --git a/runtimepy/data/css/bootstrap_extra.css b/runtimepy/data/css/bootstrap_extra.css
index 07fe17c3..4bf12189 100644
--- a/runtimepy/data/css/bootstrap_extra.css
+++ b/runtimepy/data/css/bootstrap_extra.css
@@ -104,7 +104,6 @@ button:hover {
  */
 
 :root {
-  /* Prefer 'Arial' and 'Consolas' at the highest priority. */
-  --bs-font-sans-serif: Arial, "Noto Sans", "Liberation Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
-  --bs-font-monospace: Consolas, "Liberation Mono", "Courier New", monospace;
+  --bs-font-sans-serif: CascadiaCode;
+  --bs-font-monospace: CascadiaMono;
 }
diff --git a/runtimepy/data/css/font.css b/runtimepy/data/css/font.css
new file mode 100644
index 00000000..5e40ec16
--- /dev/null
+++ b/runtimepy/data/css/font.css
@@ -0,0 +1,47 @@
+@font-face {
+  font-family: CascadiaCode;
+  src: url("static/woff2/CascadiaCode-Regular.woff2");
+}
+
+@font-face {
+  font-family: CascadiaCode;
+  src: url("static/woff2/CascadiaCode-Bold.woff2");
+  font-weight: bold;
+}
+
+@font-face {
+  font-family: CascadiaCode;
+  src: url("static/woff2/CascadiaCode-BoldItalic.woff2");
+  font-weight: bold;
+  font-style: italic;
+}
+
+@font-face {
+  font-family: CascadiaCode;
+  src: url("static/woff2/CascadiaCode-Italic.woff2");
+  font-style: italic;
+}
+
+@font-face {
+  font-family: CascadiaMono;
+  src: url("static/woff2/CascadiaMono-Regular.woff2");
+}
+
+@font-face {
+  font-family: CascadiaMono;
+  src: url("static/woff2/CascadiaMono-Bold.woff2");
+  font-weight: bold;
+}
+
+@font-face {
+  font-family: CascadiaMono;
+  src: url("static/woff2/CascadiaMono-BoldItalic.woff2");
+  font-weight: bold;
+  font-style: italic;
+}
+
+@font-face {
+  font-family: CascadiaMono;
+  src: url("static/woff2/CascadiaMono-Italic.woff2");
+  font-style: italic;
+}
diff --git a/runtimepy/data/static/woff2/CascadiaCode-Bold.woff2 b/runtimepy/data/static/woff2/CascadiaCode-Bold.woff2
new file mode 100644
index 00000000..351db2cc
Binary files /dev/null and b/runtimepy/data/static/woff2/CascadiaCode-Bold.woff2 differ
diff --git a/runtimepy/data/static/woff2/CascadiaCode-BoldItalic.woff2 b/runtimepy/data/static/woff2/CascadiaCode-BoldItalic.woff2
new file mode 100644
index 00000000..3a5aa63d
Binary files /dev/null and b/runtimepy/data/static/woff2/CascadiaCode-BoldItalic.woff2 differ
diff --git a/runtimepy/data/static/woff2/CascadiaCode-Italic.woff2 b/runtimepy/data/static/woff2/CascadiaCode-Italic.woff2
new file mode 100644
index 00000000..fb7c71f6
Binary files /dev/null and b/runtimepy/data/static/woff2/CascadiaCode-Italic.woff2 differ
diff --git a/runtimepy/data/static/woff2/CascadiaCode-Regular.woff2 b/runtimepy/data/static/woff2/CascadiaCode-Regular.woff2
new file mode 100644
index 00000000..734d1a8d
Binary files /dev/null and b/runtimepy/data/static/woff2/CascadiaCode-Regular.woff2 differ
diff --git a/runtimepy/data/static/woff2/CascadiaMono-Bold.woff2 b/runtimepy/data/static/woff2/CascadiaMono-Bold.woff2
new file mode 100644
index 00000000..083b137d
Binary files /dev/null and b/runtimepy/data/static/woff2/CascadiaMono-Bold.woff2 differ
diff --git a/runtimepy/data/static/woff2/CascadiaMono-BoldItalic.woff2 b/runtimepy/data/static/woff2/CascadiaMono-BoldItalic.woff2
new file mode 100644
index 00000000..7d318064
Binary files /dev/null and b/runtimepy/data/static/woff2/CascadiaMono-BoldItalic.woff2 differ
diff --git a/runtimepy/data/static/woff2/CascadiaMono-Italic.woff2 b/runtimepy/data/static/woff2/CascadiaMono-Italic.woff2
new file mode 100644
index 00000000..ec3f80a3
Binary files /dev/null and b/runtimepy/data/static/woff2/CascadiaMono-Italic.woff2 differ
diff --git a/runtimepy/data/static/woff2/CascadiaMono-Regular.woff2 b/runtimepy/data/static/woff2/CascadiaMono-Regular.woff2
new file mode 100644
index 00000000..52bd5436
Binary files /dev/null and b/runtimepy/data/static/woff2/CascadiaMono-Regular.woff2 differ
diff --git a/runtimepy/data/static/woff2/README.md b/runtimepy/data/static/woff2/README.md
new file mode 100644
index 00000000..d63d8ac1
--- /dev/null
+++ b/runtimepy/data/static/woff2/README.md
@@ -0,0 +1,7 @@
+# [Cascadia Code](https://github.com/microsoft/cascadia-code)
+
+Assets sourced from
+[this release](https://github.com/microsoft/cascadia-code/releases/tag/v2404.23).
+
+See also:
+[LICENSE](https://github.com/microsoft/cascadia-code/blob/main/LICENSE).
diff --git a/runtimepy/net/server/app/base.py b/runtimepy/net/server/app/base.py
index 1c72cb05..8f9195d3 100644
--- a/runtimepy/net/server/app/base.py
+++ b/runtimepy/net/server/app/base.py
@@ -52,10 +52,9 @@ def __init__(self, app: AppInfo) -> None:
     def populate(self, document: Html, app: TabPopulater) -> None:
         """Populate the body element with the application."""
 
-        # Third-party dependencies.
+        # CSS.
+        append_kind(document.head, "font", kind="css", tag="style")
         add_bootstrap_css(document.head)
-
-        # Internal CSS.
         append_kind(
             document.head, "main", "bootstrap_extra", kind="css", tag="style"
         )
diff --git a/tasks/dev.yaml b/tasks/dev.yaml
index 7ed0bd28..9e3b36be 100644
--- a/tasks/dev.yaml
+++ b/tasks/dev.yaml
@@ -7,7 +7,25 @@ includes:
 factories:
   - {name: tasks.tlm.LogCapture}
 tasks:
-  - {name: root_log, factory: log_capture, period_s: 0.1}
+  - name: root_log
+    factory: log_capture
+    period_s: 0.1
+    markdown: |
+      *something isn't looking right...*
+
+      **why's it looking like that...**
+
+      ***why's it looking like THAT...***
+
+      `nice mono stuff there`
+
+      *`nice slanted mono yeah`*
+
+      **`nice mono bold type shit there`**
+
+      ***`nice mono bold type slant shit there`***
+
+      ligature type shit \_\_\_|\_\_\_ ligature type shit
 
 port_overrides:
   runtimepy_https_server: 8443
@@ -15,5 +33,25 @@ port_overrides:
 # This works.
 # websocket_hostname: nuc2
 
+config:
+  top_markdown: &sample |
+    # Libre Embedded
+
+    # `Libre Embedded`
+
+    # *Libre Embedded*
+
+    # *`Libre Embedded`*
+
+    # **Libre Embedded**
+
+    # **`Libre Embedded`**
+
+    # ***Libre Embedded***
+
+    # ***`Libre Embedded`***
+
+  bottom_markdown: *sample
+
 app:
   - runtimepy.net.apps.wait_for_stop