diff --git a/src/components/VersionSelector.svelte b/src/components/VersionSelector.svelte
index 9a70a68..64d3499 100644
--- a/src/components/VersionSelector.svelte
+++ b/src/components/VersionSelector.svelte
@@ -12,7 +12,17 @@
 
   let { releases, selected, onselect, loading, error }: Props = $props();
 
-  let changelogHtml = $derived(selected?.body ? marked.parse(selected.body) : "");
+  // Tag Keep-a-Changelog section headings so CSS can color-code them
+  // (Added → green, Changed → yellow, Fixed → blue, etc.).
+  function renderBody(body: string): string {
+    const html = marked.parse(body) as string;
+    return html.replace(
+      /<h3>(Added|Changed|Fixed|Removed|Deprecated|Security)<\/h3>/g,
+      (_, text) => `<h3 data-section="${text.toLowerCase()}">${text}</h3>`,
+    );
+  }
+
+  let changelogHtml = $derived(selected?.body ? renderBody(selected.body) : "");
 
   function handleChange(e: Event) {
     const tag = (e.target as HTMLSelectElement).value;
@@ -61,49 +71,14 @@
     </div>
 
     {#if selected && changelogHtml}
-      <div class="mt-4 bg-bg-card border border-border rounded p-4">
-        <h4 class="font-mono text-xs text-text-dim uppercase tracking-wider mb-3">Changelog</h4>
-        <div class="prose-dark text-sm text-text-muted leading-relaxed">
+      <div class="mt-4 bg-bg-card border border-border rounded p-5">
+        <h4 class="font-mono text-xs text-text-dim uppercase tracking-wider mb-4">Changelog</h4>
+        <!-- Styles live in src/styles/global.css — Svelte component <style>
+             scoping wasn't being emitted into the prod CSS bundle. -->
+        <div class="changelog text-sm text-text-muted">
           {@html changelogHtml}
         </div>
       </div>
     {/if}
   {/if}
 </div>
-
-<style>
-  .prose-dark :global(h1),
-  .prose-dark :global(h2),
-  .prose-dark :global(h3) {
-    color: var(--color-text);
-    font-family: var(--font-mono);
-    font-size: 0.875rem;
-    font-weight: 600;
-    margin-top: 1rem;
-    margin-bottom: 0.5rem;
-  }
-  .prose-dark :global(ul) {
-    list-style-type: disc;
-    padding-left: 1.25rem;
-  }
-  .prose-dark :global(li) {
-    margin-bottom: 0.25rem;
-  }
-  .prose-dark :global(code) {
-    font-family: var(--font-mono);
-    font-size: 0.8em;
-    color: var(--color-accent);
-    background: var(--color-bg-elevated);
-    padding: 0.1em 0.3em;
-    border-radius: 2px;
-  }
-  .prose-dark :global(a) {
-    color: var(--color-accent);
-  }
-  .prose-dark :global(a:hover) {
-    color: var(--color-accent-bright);
-  }
-  .prose-dark :global(p) {
-    margin-bottom: 0.5rem;
-  }
-</style>
diff --git a/src/styles/global.css b/src/styles/global.css
index fb99c8f..336c581 100644
--- a/src/styles/global.css
+++ b/src/styles/global.css
@@ -70,4 +70,150 @@
     padding: 1rem;
     font-size: 0.875rem;
   }
+
+  /* Changelog typography (markdown rendered from GitHub release bodies).
+     Kept here rather than in VersionSelector.svelte because the Astro +
+     Svelte 5 build pipeline wasn't emitting the component's <style>
+     block into any CSS file, leaving the prod changelog unstyled. */
+  .changelog {
+    line-height: 1.65;
+  }
+
+  /* Top-level heading (e.g. `## [0.4.0] - 2026-04-11`) */
+  .changelog h1,
+  .changelog h2 {
+    font-family: var(--font-mono);
+    font-size: 1rem;
+    font-weight: 600;
+    color: var(--color-text);
+    margin-top: 1.5rem;
+    margin-bottom: 1rem;
+    padding-bottom: 0.5rem;
+    border-bottom: 1px solid var(--color-border);
+  }
+  .changelog h1:first-child,
+  .changelog h2:first-child {
+    margin-top: 0;
+  }
+
+  /* Section heading (e.g. `### Added`) */
+  .changelog h3 {
+    font-family: var(--font-mono);
+    font-size: 0.8125rem;
+    font-weight: 600;
+    text-transform: uppercase;
+    letter-spacing: 0.05em;
+    color: var(--color-text);
+    margin-top: 1.25rem;
+    margin-bottom: 0.5rem;
+  }
+  .changelog h3:first-child {
+    margin-top: 0;
+  }
+
+  /* Color-code Keep-a-Changelog sections */
+  .changelog h3[data-section="added"]      { color: var(--color-accent); }
+  .changelog h3[data-section="changed"]    { color: var(--color-warn); }
+  .changelog h3[data-section="fixed"]      { color: var(--color-info); }
+  .changelog h3[data-section="removed"],
+  .changelog h3[data-section="deprecated"] { color: var(--color-error); }
+  .changelog h3[data-section="security"]   { color: var(--color-warn); }
+
+  .changelog h4,
+  .changelog h5,
+  .changelog h6 {
+    font-family: var(--font-mono);
+    font-size: 0.8125rem;
+    font-weight: 600;
+    color: var(--color-text);
+    margin-top: 0.75rem;
+    margin-bottom: 0.25rem;
+  }
+
+  .changelog p {
+    margin-top: 0.5rem;
+    margin-bottom: 0.5rem;
+  }
+
+  /* Lists */
+  .changelog ul,
+  .changelog ol {
+    margin-top: 0.25rem;
+    margin-bottom: 0.5rem;
+    padding-left: 1.4rem;
+  }
+  .changelog ul { list-style-type: disc; }
+  .changelog ol { list-style-type: decimal; }
+  .changelog li { margin-bottom: 0.35rem; }
+  .changelog li::marker { color: var(--color-text-dim); }
+  .changelog li > p { margin: 0; }
+  /* Nested lists: different marker, tighter spacing */
+  .changelog ul ul {
+    list-style-type: circle;
+    margin-top: 0.25rem;
+    margin-bottom: 0.25rem;
+  }
+  .changelog ul ul ul { list-style-type: square; }
+
+  /* Inline code */
+  .changelog code {
+    font-family: var(--font-mono);
+    font-size: 0.85em;
+    color: var(--color-accent);
+    background: var(--color-bg-elevated);
+    padding: 0.1em 0.35em;
+    border-radius: 3px;
+  }
+
+  /* Fenced code blocks */
+  .changelog pre {
+    background: var(--color-bg-elevated);
+    border: 1px solid var(--color-border);
+    border-radius: 4px;
+    padding: 0.75rem 1rem;
+    margin: 0.75rem 0;
+    font-size: 0.8125rem;
+    overflow-x: auto;
+  }
+  .changelog pre code {
+    background: none;
+    padding: 0;
+    color: var(--color-text);
+    font-size: inherit;
+  }
+
+  /* Links */
+  .changelog a {
+    color: var(--color-accent);
+    text-decoration: underline;
+    text-decoration-color: color-mix(in srgb, var(--color-accent) 40%, transparent);
+    text-underline-offset: 2px;
+  }
+  .changelog a:hover {
+    color: var(--color-accent-bright);
+    text-decoration-color: var(--color-accent-bright);
+  }
+
+  /* Horizontal rule (version separator) */
+  .changelog hr {
+    border: 0;
+    border-top: 1px solid var(--color-border);
+    margin: 1.5rem 0;
+  }
+
+  .changelog strong {
+    color: var(--color-text);
+    font-weight: 600;
+  }
+  .changelog em {
+    color: var(--color-text);
+    font-style: italic;
+  }
+
+  .changelog blockquote {
+    border-left: 3px solid var(--color-border-bright);
+    margin: 0.5rem 0;
+    padding: 0.25rem 0 0.25rem 1rem;
+    color: var(--color-text-dim);
+  }
 }