diff --git a/src/client/ExplorerView.tsx b/src/client/ExplorerView.tsx
index 403cf12..84a47ba 100644
--- a/src/client/ExplorerView.tsx
+++ b/src/client/ExplorerView.tsx
@@ -66,11 +66,11 @@ export function ExplorerView(props: {
   const renderLevel = (dir: string, depth: number): ReactNode => {
     const level = data[dir]
     if (level === undefined) {
-      return <div className={css.explorerRow} style={{ paddingLeft: depth * 14 + 8 }}>{t('loading')}</div>
+      return <div className={css.explorerRow} style={{ paddingLeft: depth * 22 + 6 }}>{t('loading')}</div>
     }
     if (level.error !== undefined) {
       return (
-        <div className={clsx(css.explorerRow, css.explorerError)} style={{ paddingLeft: depth * 14 + 8 }}>
+        <div className={clsx(css.explorerRow, css.explorerError)} style={{ paddingLeft: depth * 22 + 6 }}>
           {level.error}
         </div>
       )
@@ -84,7 +84,7 @@ export function ExplorerView(props: {
             <button
               type="button"
               className={clsx(css.explorerRow, css.explorerDir, entry.hidden && css.explorerHidden)}
-              style={{ paddingLeft: depth * 14 + 8 }}
+              style={{ paddingLeft: depth * 22 + 6 }}
               onClick={() => { onToggle(entry.path) }}
             >
               {isOpen ? <IconFolderOpen16 size={14} /> : <IconFolderClose16 size={14} />}
@@ -99,7 +99,7 @@ export function ExplorerView(props: {
           key={entry.path}
           type="button"
           className={clsx(css.explorerRow, entry.hidden && css.explorerHidden)}
-          style={{ paddingLeft: depth * 14 + 8 }}
+          style={{ paddingLeft: depth * 22 + 6 }}
           title={entry.path}
           onClick={() => { onOpenFile(entry.path) }}
         >
@@ -133,7 +133,7 @@ export function ExplorerView(props: {
           <div className={css.explorerEmpty}>{t('noSession')}</div>
         ) : (
           <>
-            <div className={css.explorerRow} style={{ paddingLeft: 8 }}>
+            <div className={css.explorerRow} style={{ paddingLeft: 6 }}>
               <IconFolderOpen16 size={14} />
               <span className={css.explorerName}>{baseName(root)}</span>
             </div>
diff --git a/src/client/sidebar.module.css b/src/client/sidebar.module.css
index c2070b8..e52b17c 100644
--- a/src/client/sidebar.module.css
+++ b/src/client/sidebar.module.css
@@ -100,7 +100,8 @@
   align-items: center;
   justify-content: space-between;
   gap: 8px;
-  padding: 6px 8px 6px 12px;
+  height: 36px;
+  padding: 0 8px 0 12px;
   border-bottom: 1px solid var(--dsw-alias-border-l1);
   flex: none;
 }
@@ -119,17 +120,20 @@
   display: flex;
 }
 
+/* Icon button: the app's own icon-button pattern (ui-workspace) — a 28px
+   circle, secondary label, hover fill; no border so the icon alone is the
+   affordance. */
 .iconButton {
   display: inline-flex;
   align-items: center;
   justify-content: center;
-  width: 24px;
-  height: 24px;
+  width: 28px;
+  height: 28px;
   padding: 0;
   border: none;
-  border-radius: 6px;
+  border-radius: 50%;
   background: transparent;
-  color: var(--dsw-alias-label-tertiary);
+  color: var(--dsw-alias-label-secondary);
   cursor: pointer;
   flex: none;
 }
@@ -440,7 +444,8 @@
   align-items: center;
   justify-content: space-between;
   gap: 8px;
-  padding: 6px 8px 6px 12px;
+  height: 36px;
+  padding: 0 8px 0 12px;
 }
 
 .explorerRoot {
@@ -455,16 +460,20 @@
   flex: 1;
   min-height: 0;
   overflow-y: auto;
-  padding-bottom: 8px;
+  padding: 2px 6px 8px;
 }
 
+/* One tree row: the app's tree-row cell (34px, radius 8, inset, hover
+   fill, 22px indent step) with a mount fade so expanding a directory
+   reveals its children gently (stable keys keep existing rows from
+   replaying it). */
 .explorerRow {
   display: flex;
   align-items: center;
   gap: 6px;
   width: 100%;
-  height: 24px;
-  padding: 0 8px;
+  height: 34px;
+  padding: 0 6px;
   border: none;
   background: transparent;
   font: var(--dsw-font-xxs-12);
@@ -472,6 +481,8 @@
   text-align: left;
   cursor: pointer;
   white-space: nowrap;
+  border-radius: 8px;
+  animation: dsh-row-in 150ms var(--ds-ease-in-out);
 }
 
 .explorerRow:hover {
@@ -497,6 +508,11 @@
   cursor: default;
 }
 
+/* Mount fade for tree rows (the app's session-row reveal). */
+@keyframes dsh-row-in {
+  from { opacity: 0; }
+}
+
 .explorerEmpty {
   padding: 16px;
   font: var(--dsw-font-xxs-12);
@@ -740,7 +756,8 @@
   display: flex;
   align-items: center;
   gap: 8px;
-  padding: 6px 8px 6px 12px;
+  height: 36px;
+  padding: 0 8px 0 12px;
 }
 
 .gitBranchSelect {
@@ -791,7 +808,11 @@
   display: flex;
   align-items: center;
   gap: 6px;
-  padding: 2px 8px 2px 12px;
+  min-height: 34px;
+  margin: 0 6px;
+  padding: 0 6px 0 12px;
+  border-radius: 8px;
+  animation: dsh-row-in 150ms var(--ds-ease-in-out);
 }
 
 .gitRow:hover {
@@ -799,7 +820,7 @@
 }
 
 .gitRowSelected {
-  background: var(--dsw-alias-interactive-bg-hover);
+  background: var(--dsw-alias-interactive-bg-active);
 }
 
 .gitRowMain {
@@ -965,3 +986,39 @@
   font: var(--dsw-font-xxs-12);
   color: var(--dsw-alias-label-tertiary);
 }
+
+/* ── Shared interaction rules ──────────────────────────────────────────── */
+
+/* Keyboard focus stays visible on every interactive control (the styling
+   policy requires focus visibility; the accent token doubles as the ring). */
+.toggleButton:focus-visible,
+.iconButton:focus-visible,
+.tab:focus-visible,
+.tabClose:focus-visible,
+.tabBarPlus:focus-visible,
+.paneCard:focus-visible,
+.explorerRow:focus-visible,
+.gitRowMain:focus-visible,
+.gitLink:focus-visible,
+.gitCommitButton:focus-visible,
+.terminalRetry:focus-visible,
+.editorModeButton:focus-visible {
+  outline: 2px solid var(--dsw-alias-interactive-bg-hover-accent);
+  outline-offset: -1px;
+}
+
+/* Reduced motion: no slides, fades or color transitions. */
+@media (prefers-reduced-motion: reduce) {
+  .panel,
+  .panelHidden,
+  .toggleButton,
+  .tab,
+  .tabBarPlus,
+  .paneCard,
+  .explorerRow,
+  .gitRow,
+  .divider {
+    transition: none;
+    animation: none;
+  }
+}