파일 드래그시 보여지는 세로 seperator 개선

src/renderer/style.css

@@ -251,20 +251,16 @@ main {
   border-radius: 8px;
 }
 
-.card-placeholder {
-  border: 2px dashed var(--accent);
-  background: rgba(124, 106, 247, 0.08);
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  border-radius: 8px;
-  pointer-events: auto;
-}
-.card-placeholder-label {
-  color: var(--accent);
-  font-size: 13px;
-  font-weight: 600;
-  opacity: 0.8;
+.drop-separator {
+  position: absolute;
+  z-index: 20;
+  display: none;
+  width: 3px;
+  min-height: 48px;
+  border-radius: 999px;
+  background: var(--accent);
+  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.16), 0 0 16px rgba(124, 106, 247, 0.55);
+  pointer-events: none;
 }
 
 /* ── 썸네일: 정사각형 + object-fit: contain ── */
@@ -581,4 +577,4 @@ footer span { font-size: 11px; color: var(--muted); }
   padding: 12px 24px; border-radius: 12px;
   opacity: 0; transition: all .3s; pointer-events: none; z-index: 200;
 }
-#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
+#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }