Fix icon extraction, drop overlay styling, and card padding

data/resources/style.css

@@ -66,7 +66,29 @@
     color: @window_fg_color;
 }
 
+/* ===== Drop Overlay ===== */
+.drop-overlay-scrim {
+    background: alpha(@window_bg_color, 0.75);
+}
+
+.drop-zone-card {
+    background: @card_bg_color;
+    border-radius: 16px;
+    padding: 48px 40px;
+    border: 2px dashed alpha(@accent_bg_color, 0.5);
+    box-shadow: 0 8px 32px alpha(black, 0.15);
+}
+
+.drop-zone-icon {
+    color: @accent_bg_color;
+    opacity: 0.7;
+}
+
 /* ===== Card View (using libadwaita .card) ===== */
+.card {
+    padding: 24px 20px;
+}
+
 flowboxchild:focus-visible .card {
     outline: 2px solid @accent_bg_color;
     outline-offset: 3px;