diff --git a/style/base.css b/style/base.css
index e650b5a..5438dc0 100644
--- a/style/base.css
+++ b/style/base.css
@@ -4,7 +4,7 @@
     https://jupyterlab.readthedocs.io/en/stable/developer/css.html
 */
 
-/* AI action buttons inside the native Cell toolbar (active cell, top-right). */
+/* Single AI action button inside the native Cell toolbar (active cell, top-right). */
 .opencode-cell-actions {
   display: flex;
   align-items: center;
@@ -13,19 +13,63 @@
 .opencode-cell-actions .opencode-btn {
   border: none;
   background: transparent;
-  padding: 0 4px;
+  padding: 0 6px;
   font-size: var(--jp-ui-font-size1);
   line-height: 20px;
   cursor: pointer;
   white-space: nowrap;
 }
 
+.opencode-cell-actions .opencode-btn:hover:enabled {
+  background: var(--jp-layout-color2);
+  border-radius: 2px;
+}
+
 .opencode-cell-actions .opencode-btn:disabled {
   opacity: 0.4;
   cursor: default;
 }
 
-.opencode-cell-actions .opencode-btn:hover:enabled {
-  background: var(--jp-layout-color2);
-  border-radius: 2px;
+/* Inline prompt panel attached to the cell when the AI button is clicked. */
+.opencode-inline-prompt {
+  display: flex;
+  flex-direction: column;
+  gap: 4px;
+  padding: 6px;
+  margin: 4px 8px;
+  border: 1px solid var(--jp-border-color2, #ddd);
+  border-radius: 4px;
+  background: var(--jp-layout-color1, #fff);
+}
+
+.opencode-inline-prompt textarea {
+  width: 100%;
+  resize: vertical;
+  font-family: var(--jp-code-font-family, monospace);
+  font-size: var(--jp-code-font-size, 13px);
+  box-sizing: border-box;
+}
+
+.opencode-inline-prompt .opencode-inline-actions {
+  display: flex;
+  justify-content: flex-end;
+  gap: 4px;
+}
+
+.opencode-inline-prompt .opencode-inline-actions button {
+  border: 1px solid var(--jp-border-color2, #ccc);
+  background: var(--jp-layout-color2, #f7f7f7);
+  padding: 2px 8px;
+  border-radius: 3px;
+  cursor: pointer;
+  font-size: var(--jp-ui-font-size1);
+}
+
+.opencode-inline-prompt .opencode-inline-actions button:hover:enabled {
+  background: var(--jp-layout-color3, #eaeaea);
+}
+
+.opencode-inline-prompt .opencode-inline-actions button:disabled {
+  opacity: 0.4;
+  cursor: default;
 }