diff --git a/libs/tiptap-editor/src/style.css b/libs/tiptap-editor/src/style.css
index f5951eb..e454c18 100644
--- a/libs/tiptap-editor/src/style.css
+++ b/libs/tiptap-editor/src/style.css
@@ -372,6 +372,91 @@
   border-radius: 6px;
 }
 
+/* ========== Upload Image Placeholder NodeView ========== */
+.upload-image-container {
+  position: relative;
+  display: inline-block;
+  max-width: 100%;
+}
+.upload-image-container img {
+  max-width: 100%;
+  height: auto;
+  border-radius: 6px;
+  margin: 1em 0;
+  display: block;
+}
+.upload-image-container.is-error img {
+  opacity: 0.5;
+  filter: grayscale(0.5);
+}
+.upload-image-overlay {
+  position: absolute;
+  inset: 0;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  gap: 8px;
+  border-radius: 6px;
+  pointer-events: none;
+}
+.upload-image-container.is-error .upload-image-overlay {
+  background: rgba(0, 0, 0, 0.35);
+  pointer-events: auto;
+}
+.upload-spinner {
+  width: 28px;
+  height: 28px;
+  border: 3px solid rgba(255, 255, 255, 0.4);
+  border-top-color: #fff;
+  border-radius: 50%;
+  animation: upload-spin 0.8s linear infinite;
+}
+@keyframes upload-spin {
+  to { transform: rotate(360deg); }
+}
+.upload-overlay-text {
+  color: #fff;
+  font-size: 13px;
+  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
+}
+.upload-error-icon {
+  color: #fff;
+  font-size: 22px;
+  line-height: 1;
+}
+.upload-error-msg {
+  color: #fff;
+  font-size: 13px;
+  text-align: center;
+  padding: 0 12px;
+  max-width: 90%;
+  word-break: break-word;
+}
+.upload-error-actions {
+  display: flex;
+  gap: 8px;
+}
+.upload-btn {
+  padding: 3px 12px;
+  font-size: 12px;
+  border-radius: 4px;
+  border: 1px solid rgba(255, 255, 255, 0.6);
+  background: rgba(255, 255, 255, 0.15);
+  color: #fff;
+  cursor: pointer;
+}
+.upload-btn:hover {
+  background: rgba(255, 255, 255, 0.3);
+}
+.upload-btn-remove {
+  border-color: rgba(254, 202, 202, 0.7);
+  color: #fecaca;
+}
+.upload-btn-remove:hover {
+  background: rgba(239, 68, 68, 0.3);
+}
+
 /* ========== Dark Theme: Table ========== */
 .dark .tiptap-editor table {
   border-color: #333;
@@ -420,6 +505,15 @@
 .dark .tiptap-editor img.ProseMirror-selectednode {
   outline-color: #58a6ff;
 }
+.dark .upload-image-container.is-error img {
+  opacity: 0.45;
+}
+.dark .upload-btn {
+  border-color: rgba(200, 200, 200, 0.4);
+}
+.dark .upload-btn-remove {
+  border-color: rgba(239, 68, 68, 0.5);
+}
 
 /* ========== Dark Theme: Task List ========== */
 .dark .tiptap-editor ul[data-type="taskList"] li > label input[type="checkbox"] {