diff --git a/packages/session-ui/src/components/file.tsx b/packages/session-ui/src/components/file.tsx
index db01a88bf3b..5e8b4a82f5e 100644
--- a/packages/session-ui/src/components/file.tsx
+++ b/packages/session-ui/src/components/file.tsx
@@ -255,8 +255,16 @@ function useFileViewer(config: ViewerConfig) {
     if (!dragMoved) {
       pendingSelectionEnd = false
       const selected = config.buildClickSelection()
-      if (selected) config.setSelectedLines(selected)
-      config.onLineSelectionEnd(lastSelection)
+      const next =
+        selected &&
+        lastSelection?.start === selected.start &&
+        lastSelection.end === selected.end &&
+        lastSelection.side === selected.side &&
+        (lastSelection.endSide ?? lastSelection.side) === (selected.endSide ?? selected.side)
+          ? null
+          : selected
+      if (next !== undefined) config.setSelectedLines(next)
+      config.onLineSelectionEnd(next === undefined ? lastSelection : next)
       dragStart = undefined
       dragEnd = undefined
       dragMoved = false
@@ -291,10 +299,29 @@ function useFileViewer(config: ViewerConfig) {
   createEffect(() => {
     rendered()
     const ranges = config.commentedLines()
-    requestAnimationFrame(() => {
-      const root = getRoot()
-      if (!root) return
+    const root = getRoot()
+    if (!root) return
+    if (ranges.length === 0) {
       config.markCommented(root, ranges)
+      return
+    }
+
+    let frame: number | undefined
+    const mark = () => {
+      if (frame !== undefined) cancelAnimationFrame(frame)
+      frame = requestAnimationFrame(() => {
+        frame = undefined
+        config.markCommented(root, ranges)
+      })
+    }
+    const observer = new MutationObserver(mark)
+
+    observer.observe(root, { childList: true, subtree: true })
+    mark()
+
+    onCleanup(() => {
+      observer.disconnect()
+      if (frame !== undefined) cancelAnimationFrame(frame)
     })
   })
 
diff --git a/packages/session-ui/src/pierre/index.ts b/packages/session-ui/src/pierre/index.ts
index 1e26d944175..714110d92a2 100644
--- a/packages/session-ui/src/pierre/index.ts
+++ b/packages/session-ui/src/pierre/index.ts
@@ -26,30 +26,19 @@ const unsafeCSS = `
     color-mix(in lab, var(--diffs-bg) 33.333%, var(--diffs-deletion-base)),
     color-mix(in lab, var(--diffs-bg) 60%, var(--diffs-deletion-base))
   );
+  --diffs-bg-deletion-number-override: var(--diffs-bg-deletion-override);
   --diffs-bg-addition-override: light-dark(
     color-mix(in lab, var(--diffs-bg) 33.333%, var(--diffs-addition-base)),
     color-mix(in lab, var(--diffs-bg) 60%, var(--diffs-addition-base))
   );
-  --diffs-selection-base: var(--surface-warning-strong);
-  --diffs-selection-border: var(--border-warning-base);
-  --diffs-selection-number-fg: #1c1917;
+  --diffs-bg-addition-number-override: var(--diffs-bg-addition-override);
+  --diffs-selection-base: var(--v2-background-bg-accent);
+  --diffs-selection-number-fg: var(--v2-text-text-accent);
+  --diffs-comment-bg: rgb(from var(--v2-background-bg-accent) r g b / 0.06);
   /* Use explicit alpha instead of color-mix(..., transparent) to avoid Safari's non-premultiplied interpolation bugs. */
-  --diffs-bg-selection: var(--diffs-bg-selection-override, rgb(from var(--surface-warning-base) r g b / 0.65));
-  --diffs-bg-selection-number: var(
-    --diffs-bg-selection-number-override,
-    rgb(from var(--surface-warning-base) r g b / 0.85)
-  );
-  --diffs-bg-selection-text: rgb(from var(--surface-warning-strong) r g b / 0.2);
-}
-
-:host([data-color-scheme='dark']) [data-diff],
-:host([data-color-scheme='dark']) [data-file] {
-  --diffs-selection-number-fg: #fdfbfb;
-  --diffs-bg-selection: var(--diffs-bg-selection-override, rgb(from var(--solaris-dark-6) r g b / 0.65));
-  --diffs-bg-selection-number: var(
-    --diffs-bg-selection-number-override,
-    rgb(from var(--solaris-dark-6) r g b / 0.85)
-  );
+  --diffs-bg-selection: var(--diffs-bg-selection-override, rgb(from var(--diffs-selection-base) r g b / 0.2));
+  --diffs-bg-selection-number: var(--diffs-bg-selection-number-override, var(--diffs-bg-selection));
+  --diffs-bg-selection-text: rgb(from var(--diffs-selection-base) r g b / 0.2);
 }
 
 [data-diff] ::selection,
@@ -57,6 +46,34 @@ const unsafeCSS = `
   background-color: var(--diffs-bg-selection-text);
 }
 
+[data-indicators='bars'] [data-column-number][data-line-type='change-addition']::before,
+[data-indicators='bars'] [data-column-number][data-line-type='change-deletion']::before {
+  width: 2px;
+}
+
+[data-indicators='bars'] [data-column-number][data-line-type='change-deletion']::before {
+  background-image: none;
+  background-color: var(--diffs-deletion-base);
+}
+
+[data-background] [data-column-number] {
+  --mix-light: 88%;
+  --mix-dark: 80%;
+}
+
+[data-diff-type='split'] [data-additions],
+[data-diff-type='split'] [data-additions] [data-gutter],
+[data-diff-type='split'] [data-deletions],
+[data-diff-type='split'] [data-deletions] [data-content] {
+  border-left: 0;
+  border-right: 0;
+}
+
+[data-content-buffer] {
+  background-image: none;
+  background-color: var(--diffs-bg-context-gutter);
+}
+
 ::highlight(opencode-find) {
   background-color: rgb(from var(--surface-warning-base) r g b / 0.35);
 }
@@ -83,22 +100,24 @@ const unsafeCSS = `
   color: var(--diffs-selection-number-fg);
 }
 
-[data-diff] [data-line-annotation][data-comment-selected]:not([data-selected-line]) [data-annotation-content] {
-  box-shadow: inset 0 0 0 9999px var(--diffs-bg-selection);
-}
-
-[data-file] [data-line-annotation][data-comment-selected]:not([data-selected-line]) [data-annotation-content] {
-  box-shadow: inset 0 0 0 9999px var(--diffs-bg-selection);
+[data-diff] [data-line-annotation],
+[data-diff] [data-gutter-buffer='annotation'],
+[data-file] [data-line-annotation],
+[data-file] [data-gutter-buffer='annotation'] {
+  --diffs-annotation-bg: var(--diffs-comment-bg);
+  --diffs-computed-decoration-bg: var(--diffs-comment-bg);
+  --diffs-computed-diff-line-bg: var(--diffs-comment-bg);
+  --diffs-computed-selected-line-bg: var(--diffs-comment-bg);
+  --diffs-line-bg: var(--diffs-comment-bg);
+  background-color: var(--diffs-comment-bg);
 }
 
 [data-diff] [data-line][data-selected-line] {
   background-color: var(--diffs-bg-selection);
-  box-shadow: inset 2px 0 0 var(--diffs-selection-border);
 }
 
 [data-file] [data-line][data-selected-line] {
   background-color: var(--diffs-bg-selection);
-  box-shadow: inset 2px 0 0 var(--diffs-selection-border);
 }
 
 [data-diff] [data-column-number][data-selected-line] {
@@ -118,6 +137,19 @@ const unsafeCSS = `
   color: var(--diffs-selection-number-fg);
 }
 
+@media (pointer: fine) {
+  [data-gutter-utility-slot] {
+    opacity: 0;
+    pointer-events: none;
+  }
+
+  [data-column-number][data-hovered] [data-gutter-utility-slot],
+  [data-gutter-utility-slot]:focus-within {
+    opacity: 1;
+    pointer-events: auto;
+  }
+}
+
 /* The deletion word-diff emphasis is stronger than additions; soften it while selected so the selection highlight reads consistently. */
 [data-diff] [data-line][data-line-type='change-deletion'][data-selected-line] {
   --diffs-bg-deletion-emphasis: light-dark(
@@ -133,7 +165,6 @@ const unsafeCSS = `
     height: 24px;
   }
   [data-column-number] {
-    background-color: var(--diffs-bg);
     cursor: default !important;
   }
 
@@ -182,5 +213,6 @@ export const styleVariables = {
   "--diffs-font-features": "var(--font-family-mono--font-feature-settings)",
   "--diffs-header-font-family": "var(--font-family-sans)",
   "--diffs-gap-block": 0,
-  "--diffs-min-number-column-width": "4ch",
+  "--diffs-gap-style": 0,
+  "--diffs-min-number-column-width": "3ch",
 }
diff --git a/packages/session-ui/src/v2/components/line-comment-annotations-v2.tsx b/packages/session-ui/src/v2/components/line-comment-annotations-v2.tsx
index cd27a1ecc7b..c08deab1593 100644
--- a/packages/session-ui/src/v2/components/line-comment-annotations-v2.tsx
+++ b/packages/session-ui/src/v2/components/line-comment-annotations-v2.tsx
@@ -151,7 +151,10 @@ export function createLineCommentControllerV2<T extends LineCommentShape>(props:
               }
             : undefined
         },
-        onMouseEnter: () => note.hoverComment(comment.selection),
+        onMouseEnter: () => {
+          if (note.commenting()) return
+          note.hoverComment(comment.selection)
+        },
         onClick: () => {
           if (note.isEditing(comment.id)) return
           note.toggleComment(comment.id, comment.selection)
@@ -164,10 +167,14 @@ export function createLineCommentControllerV2<T extends LineCommentShape>(props:
       },
       selection: formatSelectedLineLabel(range, i18n.t),
       onInput: note.setDraft,
-      onCancel: note.cancelDraft,
+      onCancel: () => {
+        note.cancelDraft()
+        note.select(null)
+      },
       onSubmit: (comment) => {
         props.onSubmit({ comment, selection: cloneSelectedLineRange(range) })
         note.cancelDraft()
+        note.select(null)
       },
       cancelLabel: i18n.t("ui.lineComment.cancel"),
       submitLabel: i18n.t("ui.lineComment.submit"),
diff --git a/packages/ui/src/theme/themes/oc-2.json b/packages/ui/src/theme/themes/oc-2.json
index acbc56eee52..ef05ccfbffc 100644
--- a/packages/ui/src/theme/themes/oc-2.json
+++ b/packages/ui/src/theme/themes/oc-2.json
@@ -41,7 +41,8 @@
       "syntax-type": "var(--v2-purple-800)",
       "syntax-constant": "#007b80",
       "syntax-critical": "var(--v2-red-800)",
-      "syntax-diff-delete": "#ff8c00",
+      "syntax-diff-add": "var(--v2-state-fg-success)",
+      "syntax-diff-delete": "var(--v2-state-fg-danger)",
       "syntax-diff-unknown": "#a753ae",
       "surface-critical-base": "#FFF2F0"
     },
@@ -275,7 +276,8 @@
       "syntax-type": "var(--v2-purple-400)",
       "syntax-constant": "#93e9f6",
       "syntax-critical": "var(--v2-red-400)",
-      "syntax-diff-delete": "#fab283",
+      "syntax-diff-add": "var(--v2-state-fg-success)",
+      "syntax-diff-delete": "var(--v2-state-fg-danger)",
       "syntax-diff-unknown": "#edb2f1",
       "surface-critical-base": "#1F0603"
     },