diff --git a/src/editor/_code.scss b/src/editor/_code.scss
new file mode 100644
index 0000000..0b1c9ff
--- /dev/null
+++ b/src/editor/_code.scss
@@ -0,0 +1,22 @@
+body {
+  --code-background: var(--background-secondary);
+  --code-white-space: pre;
+  --code-size: 0.88em;
+  --code-normal: var(--text-normal);
+  --code-comment: var(--text-faint);
+  --code-function: var(--color-blue);
+  --code-important: var(--color-orange);
+  --code-keyword: var(--text-accent);
+  --code-operator: var(--text-muted);
+  --code-property: var(--color-cyan);
+  --code-punctuation: var(--text-muted);
+  --code-string: var(--color-orange);
+  --code-tag: var(--color-red);
+  --code-value: var(--color-purple);
+}
+
+/* Obsidian has no code-block border or radius variable. */
+.markdown-rendered pre {
+  border: var(--border-width) solid var(--background-modifier-border);
+  border-radius: 6px;
+}
diff --git a/src/editor/_lists.scss b/src/editor/_lists.scss
new file mode 100644
index 0000000..74f5fa9
--- /dev/null
+++ b/src/editor/_lists.scss
@@ -0,0 +1,20 @@
+body {
+  --list-indent: 2em;
+  --list-indent-editing: 0.75em;
+  --list-spacing: var(--size-2-1);
+  --list-marker-color: var(--text-muted);
+  --list-marker-color-hover: var(--text-accent);
+  --list-marker-color-collapsed: var(--text-accent);
+  --list-bullet-border: 1px solid var(--text-muted);
+  --list-bullet-radius: 50%;
+  --list-bullet-size: 5px;
+  --checkbox-radius: 4px;
+  --checkbox-size: 16px;
+  --checkbox-marker-color: var(--text-on-accent);
+  --checkbox-color: var(--interactive-accent);
+  --checkbox-color-hover: var(--interactive-accent-hover);
+  --checkbox-border-color: var(--text-faint);
+  --checkbox-border-color-hover: var(--text-muted);
+  --checklist-done-decoration: line-through;
+  --checklist-done-color: var(--text-faint);
+}
diff --git a/src/editor/_quotes.scss b/src/editor/_quotes.scss
new file mode 100644
index 0000000..c1153d7
--- /dev/null
+++ b/src/editor/_quotes.scss
@@ -0,0 +1,9 @@
+body {
+  --blockquote-background-color: transparent;
+  --blockquote-border-thickness: 2px;
+  --blockquote-border-color: var(--text-accent);
+  --blockquote-font-style: normal;
+  --blockquote-color: var(--text-muted);
+  --hr-color: var(--background-modifier-border);
+  --hr-thickness: 1px;
+}
diff --git a/src/theme.scss b/src/theme.scss
index d57e970..232187c 100644
--- a/src/theme.scss
+++ b/src/theme.scss
@@ -4,3 +4,6 @@
 @use "foundations/typography";
 @use "editor/headings";
 @use "editor/inline";
+@use "editor/lists";
+@use "editor/quotes";
+@use "editor/code";
diff --git a/tests/editor-blocks.test.mjs b/tests/editor-blocks.test.mjs
new file mode 100644
index 0000000..6bf5431
--- /dev/null
+++ b/tests/editor-blocks.test.mjs
@@ -0,0 +1,88 @@
+import assert from "node:assert/strict";
+import { readFile } from "node:fs/promises";
+import test from "node:test";
+
+import postcss from "postcss";
+
+import { declarationsFor } from "./helpers/css.mjs";
+
+const css = await readFile(new URL("../theme.css", import.meta.url), "utf8");
+const body = declarationsFor(css, "body");
+
+function assertDeclarations(expected) {
+  for (const [property, value] of Object.entries(expected)) {
+    assert.equal(body.get(property), value, property);
+  }
+}
+
+test("defines list and task variables", () => {
+  assertDeclarations({
+    "--list-indent": "2em",
+    "--list-indent-editing": "0.75em",
+    "--list-spacing": "var(--size-2-1)",
+    "--list-marker-color": "var(--text-muted)",
+    "--list-marker-color-hover": "var(--text-accent)",
+    "--list-marker-color-collapsed": "var(--text-accent)",
+    "--list-bullet-border": "1px solid var(--text-muted)",
+    "--list-bullet-radius": "50%",
+    "--list-bullet-size": "5px",
+    "--checkbox-radius": "4px",
+    "--checkbox-size": "16px",
+    "--checkbox-marker-color": "var(--text-on-accent)",
+    "--checkbox-color": "var(--interactive-accent)",
+    "--checkbox-color-hover": "var(--interactive-accent-hover)",
+    "--checkbox-border-color": "var(--text-faint)",
+    "--checkbox-border-color-hover": "var(--text-muted)",
+    "--checklist-done-decoration": "line-through",
+    "--checklist-done-color": "var(--text-faint)",
+  });
+});
+
+test("defines quote and horizontal rule variables", () => {
+  assertDeclarations({
+    "--blockquote-background-color": "transparent",
+    "--blockquote-border-thickness": "2px",
+    "--blockquote-border-color": "var(--text-accent)",
+    "--blockquote-font-style": "normal",
+    "--blockquote-color": "var(--text-muted)",
+    "--hr-color": "var(--background-modifier-border)",
+    "--hr-thickness": "1px",
+  });
+});
+
+test("defines semantic code variables", () => {
+  assertDeclarations({
+    "--code-background": "var(--background-secondary)",
+    "--code-white-space": "pre",
+    "--code-size": "0.88em",
+    "--code-normal": "var(--text-normal)",
+    "--code-comment": "var(--text-faint)",
+    "--code-function": "var(--color-blue)",
+    "--code-important": "var(--color-orange)",
+    "--code-keyword": "var(--text-accent)",
+    "--code-operator": "var(--text-muted)",
+    "--code-property": "var(--color-cyan)",
+    "--code-punctuation": "var(--text-muted)",
+    "--code-string": "var(--color-orange)",
+    "--code-tag": "var(--color-red)",
+    "--code-value": "var(--color-purple)",
+  });
+});
+
+test("adds the single code block selector with direct border declarations", () => {
+  const rules = [];
+
+  postcss.parse(css).walkRules((rule) => {
+    if (rule.selector === ".markdown-rendered pre") rules.push(rule);
+  });
+
+  assert.equal(rules.length, 1);
+  const declarations = rules[0].nodes.filter((node) => node.type === "decl");
+  assert.deepEqual(
+    declarations.map(({ prop, value }) => [prop, value]),
+    [
+      ["border", "var(--border-width) solid var(--background-modifier-border)"],
+      ["border-radius", "6px"],
+    ],
+  );
+});
diff --git a/theme.css b/theme.css
index 27f4afa..51d0a76 100644
--- a/theme.css
+++ b/theme.css
@@ -109,3 +109,57 @@ body {
   --link-external-decoration: none;
   --link-external-decoration-hover: underline;
 }
+
+body {
+  --list-indent: 2em;
+  --list-indent-editing: 0.75em;
+  --list-spacing: var(--size-2-1);
+  --list-marker-color: var(--text-muted);
+  --list-marker-color-hover: var(--text-accent);
+  --list-marker-color-collapsed: var(--text-accent);
+  --list-bullet-border: 1px solid var(--text-muted);
+  --list-bullet-radius: 50%;
+  --list-bullet-size: 5px;
+  --checkbox-radius: 4px;
+  --checkbox-size: 16px;
+  --checkbox-marker-color: var(--text-on-accent);
+  --checkbox-color: var(--interactive-accent);
+  --checkbox-color-hover: var(--interactive-accent-hover);
+  --checkbox-border-color: var(--text-faint);
+  --checkbox-border-color-hover: var(--text-muted);
+  --checklist-done-decoration: line-through;
+  --checklist-done-color: var(--text-faint);
+}
+
+body {
+  --blockquote-background-color: transparent;
+  --blockquote-border-thickness: 2px;
+  --blockquote-border-color: var(--text-accent);
+  --blockquote-font-style: normal;
+  --blockquote-color: var(--text-muted);
+  --hr-color: var(--background-modifier-border);
+  --hr-thickness: 1px;
+}
+
+body {
+  --code-background: var(--background-secondary);
+  --code-white-space: pre;
+  --code-size: 0.88em;
+  --code-normal: var(--text-normal);
+  --code-comment: var(--text-faint);
+  --code-function: var(--color-blue);
+  --code-important: var(--color-orange);
+  --code-keyword: var(--text-accent);
+  --code-operator: var(--text-muted);
+  --code-property: var(--color-cyan);
+  --code-punctuation: var(--text-muted);
+  --code-string: var(--color-orange);
+  --code-tag: var(--color-red);
+  --code-value: var(--color-purple);
+}
+
+/* Obsidian has no code-block border or radius variable. */
+.markdown-rendered pre {
+  border: var(--border-width) solid var(--background-modifier-border);
+  border-radius: 6px;
+}