diff --git a/src/web/public/app.js b/src/web/public/app.js
index b95fa4a3..1c535ddb 100644
--- a/src/web/public/app.js
+++ b/src/web/public/app.js
@@ -1110,9 +1110,10 @@ class CodemanApp {
 
   /** Render markdown to sanitized HTML, falling back to plain text if marked.js unavailable */
   _renderMarkdown(text) {
+    const src = text || '';
     if (typeof marked !== 'undefined' && marked.parse) {
       try {
-        const prepared = this._preprocessAsciiArt(text);
+        const prepared = this._preprocessAsciiArt(src);
         let html = this._sanitizeHtml(marked.parse(prepared, { breaks: true, gfm: true }));
         // Wrap tables in a horizontal-scroll container so they overflow gracefully
         // on mobile without collapsing into block-level cells.
@@ -1168,7 +1169,7 @@ class CodemanApp {
       } catch { /* fall through */ }
     }
     // Fallback: escape HTML and preserve whitespace
-    const escaped = text.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
+    const escaped = src.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
     return `<pre style="white-space:pre-wrap;word-break:break-word">${escaped}</pre>`;
   }
 
diff --git a/src/web/public/styles.css b/src/web/public/styles.css
index b96277ef..0272c7ae 100644
--- a/src/web/public/styles.css
+++ b/src/web/public/styles.css
@@ -7971,14 +7971,15 @@ kbd {
   bottom: 0;
   left: 0;
   right: 0;
-  max-height: 85vh;
-  background: #1a1a2e;
-  border-top: 1px solid #333;
-  border-radius: 12px 12px 0 0;
+  max-height: 88vh;
+  background: #14141f;
+  border-top: 1px solid #2a2a3a;
+  border-radius: 14px 14px 0 0;
+  box-shadow: 0 -8px 32px rgba(0, 0, 0, 0.45);
   z-index: 5000;
   flex-direction: column;
   transform: translateY(100%);
-  transition: transform 0.25s ease-out;
+  transition: transform 0.28s cubic-bezier(0.22, 1, 0.36, 1);
 }
 
 .response-viewer.visible {
@@ -7990,12 +7991,13 @@ kbd {
   display: flex;
   align-items: center;
   justify-content: space-between;
-  padding: 12px 16px;
-  border-bottom: 1px solid #333;
+  padding: 14px 20px;
+  border-bottom: 1px solid #2a2a3a;
   flex-shrink: 0;
   font-size: 14px;
   font-weight: 600;
-  color: #e0e0e0;
+  color: #e8e8ec;
+  letter-spacing: 0.2px;
 }
 
 .response-viewer-actions {
@@ -8078,42 +8080,80 @@ kbd {
   background: rgba(109, 219, 127, 0.12);
 }
 
-/* Markdown rendered content inside response viewer */
-.rv-text {
-  word-break: break-word;
-  line-height: 1.6;
+/* Markdown rendered content inside response viewer.
+   Prose uses a proportional font for readability; code keeps monospace. */
+.rv-text,
+.response-viewer-body > :not(.rv-message) {
+  word-break: normal;
+  overflow-wrap: anywhere;
+  line-height: 1.7;
 }
 
-.rv-text p {
-  margin: 0 0 0.6em;
+.rv-text p,
+.response-viewer-body > p {
+  margin: 0 0 0.85em;
 }
 
-.rv-text p:last-child {
+.rv-text p:last-child,
+.response-viewer-body > p:last-child {
   margin-bottom: 0;
 }
 
-.rv-text h1, .rv-text h2, .rv-text h3, .rv-text h4 {
-  color: #e0e0e0;
-  margin: 1em 0 0.4em;
+.rv-text h1, .rv-text h2, .rv-text h3, .rv-text h4,
+.response-viewer-body > h1, .response-viewer-body > h2,
+.response-viewer-body > h3, .response-viewer-body > h4 {
+  color: #f2f2f6;
+  margin: 1.4em 0 0.5em;
   line-height: 1.3;
+  font-weight: 700;
+  letter-spacing: -0.01em;
 }
 
-.rv-text h1 { font-size: 1.3em; }
-.rv-text h2 { font-size: 1.15em; }
-.rv-text h3 { font-size: 1.05em; }
+.rv-text h1:first-child, .rv-text h2:first-child,
+.response-viewer-body > h1:first-child, .response-viewer-body > h2:first-child {
+  margin-top: 0;
+}
 
-.rv-text code {
-  background: #2a2a3e;
-  padding: 1px 5px;
-  border-radius: 3px;
+.rv-text h1, .response-viewer-body > h1 {
+  font-size: 1.55em;
+  padding-bottom: 0.3em;
+  border-bottom: 1px solid #2d2d40;
+}
+.rv-text h2, .response-viewer-body > h2 {
+  font-size: 1.3em;
+  color: #ffd27a;
+}
+.rv-text h3, .response-viewer-body > h3 {
+  font-size: 1.13em;
+  color: #bfc8ff;
+}
+.rv-text h4, .response-viewer-body > h4 {
+  font-size: 1em;
+  color: #c9c9d5;
+  text-transform: uppercase;
+  letter-spacing: 0.05em;
+}
+
+.rv-text code,
+.response-viewer-body > :not(pre) code {
+  background: #262638;
+  color: #ffb4a2;
+  padding: 1px 6px;
+  border-radius: 4px;
+  font-family: 'Fira Code', 'JetBrains Mono', 'SF Mono', Menlo, Monaco, monospace;
   font-size: 0.9em;
 }
 
-.rv-text pre {
-  background: #1e1e2e;
-  border: 1px solid #333;
-  border-radius: 6px;
-  padding: 10px 12px;
+/* Descendant (not child) combinator: code blocks are wrapped in .rv-code-wrap,
+   so the latest-response view (markdown rendered straight into the body) nests
+   <pre> one level deeper than a direct child. The historical .rv-text path
+   already matched via descendant; keep both in lockstep. */
+.rv-text pre,
+.response-viewer-body pre {
+  background: #0f0f1a;
+  border: 1px solid #2a2a3d;
+  border-radius: 8px;
+  padding: 14px 16px;
   overflow-x: auto;
   margin: 1em 0;
   -webkit-overflow-scrolling: touch;
@@ -8125,7 +8165,7 @@ kbd {
    Preserve indentation (pre-wrap) but allow breaks inside long tokens
    (URLs, paths, identifiers) so they don't overflow. */
 .rv-text pre code,
-.response-viewer-body > pre code {
+.response-viewer-body pre code {
   background: none;
   color: #e6e6f0;
   padding: 0;
@@ -8294,38 +8334,43 @@ kbd {
 .rv-text ul, .rv-text ol,
 .response-viewer-body > ul, .response-viewer-body > ol {
   margin: 0.6em 0;
+  padding-left: 1.5em;
 }
 
-.rv-text pre code {
-  background: none;
-  padding: 0;
-  font-size: 0.85em;
-  line-height: 1.5;
+.rv-text li,
+.response-viewer-body > ul > li, .response-viewer-body > ol > li {
+  margin-bottom: 0.3em;
 }
 
-.rv-text ul, .rv-text ol {
-  margin: 0.4em 0;
-  padding-left: 1.4em;
-}
+.rv-text li > p { margin: 0.2em 0; }
 
-.rv-text li {
-  margin-bottom: 0.2em;
+.rv-text blockquote,
+.response-viewer-body > blockquote {
+  border-left: 3px solid #5c7cfa;
+  background: rgba(92, 124, 250, 0.06);
+  margin: 0.8em 0;
+  padding: 0.5em 14px;
+  color: #b8b8c8;
+  border-radius: 0 6px 6px 0;
 }
 
-.rv-text blockquote {
-  border-left: 3px solid #444;
-  margin: 0.6em 0;
-  padding: 0.3em 0 0.3em 12px;
-  color: #999;
+.rv-text strong,
+.response-viewer-body > p strong,
+.response-viewer-body > li strong {
+  color: #ffffff;
+  font-weight: 700;
 }
 
-.rv-text strong {
-  color: #f0f0f0;
+.rv-text em,
+.response-viewer-body em {
+  color: #e0e0ec;
 }
 
-.rv-text a {
-  color: #5c7cfa;
+.rv-text a,
+.response-viewer-body a {
+  color: #7aa2ff;
   text-decoration: none;
+  border-bottom: 1px solid rgba(122, 162, 255, 0.35);
 }
 
 .rv-text a:hover,
@@ -8403,19 +8448,37 @@ kbd {
 .rv-text hr,
 .response-viewer-body > hr {
   border: none;
-  border-top: 1px solid #333;
-  margin: 1em 0;
+  border-top: 1px solid #2d2d40;
+  margin: 1.5em 0;
 }
 
 .response-viewer-body {
   flex: 1;
   overflow-y: auto;
   -webkit-overflow-scrolling: touch;
-  padding: 16px;
-  font-family: 'Fira Code', 'Cascadia Code', 'JetBrains Mono', 'SF Mono', Monaco, monospace;
-  font-size: 13px;
-  line-height: 1.5;
-  color: #d4d4d4;
+  overscroll-behavior: contain;
+  padding: 20px 22px 28px;
+  /* Proportional font for prose — monospace only for code/pre */
+  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'PingFang SC',
+    'Hiragino Sans GB', 'Segoe UI', 'Helvetica Neue', Helvetica, Arial,
+    'Noto Sans CJK SC', sans-serif;
+  font-size: 15px;
+  line-height: 1.7;
+  color: #d8d8e0;
+  /* Comfortable reading width on wider viewports */
+  --rv-content-max: 720px;
+}
+
+/* Constrain content width for readability; code blocks can still scroll horizontally */
+.response-viewer-body > * {
+  max-width: var(--rv-content-max);
+  margin-left: auto;
+  margin-right: auto;
+}
+.response-viewer-body > pre,
+.response-viewer-body > table,
+.response-viewer-body > .rv-message {
+  max-width: var(--rv-content-max);
 }
 
 .response-viewer-body:empty::after {