fix: keep med detail stock and package values consistent (#249)

frontend/src/styles.css

@@ -4684,7 +4684,7 @@ button.has-validation-error {
 	position: relative;
 	z-index: 1;
 	padding-bottom: calc(1rem + env(safe-area-inset-bottom, 0px));
-	margin: 0 -2rem;
+	margin: 0;
 }
 
 /* Mobile devices can report wide CSS viewports (e.g., 768px in device emulation).
@@ -4912,7 +4912,7 @@ button.has-validation-error {
 		justify-content: center;
 		flex-wrap: wrap;
 		gap: 0.75rem;
-		margin: 0 -1.5rem;
+		margin: 0;
 	}
 
 	.med-detail-footer > button {
@@ -4969,9 +4969,8 @@ button.has-validation-error {
 		margin: 0;
 		padding-left: 1rem;
 		padding-right: 1rem;
-		position: sticky;
-		bottom: 0;
-		z-index: 5;
+		position: relative;
+		z-index: 1;
 	}
 }