diff --git a/interface/src/components/upload/DragNdrop.tsx b/interface/src/components/upload/DragNdrop.tsx
index e2cfa2abc..1449f5e6c 100644
--- a/interface/src/components/upload/DragNdrop.tsx
+++ b/interface/src/components/upload/DragNdrop.tsx
@@ -1,16 +1,59 @@
 // Code inspired by Prince Azubuike from https://medium.com/@dprincecoder/creating-a-drag-and-drop-file-upload-component-in-react-a-step-by-step-guide-4d93b6cc21e0
-import { type ChangeEvent, useRef, useState } from 'react';
+import {
+  type ChangeEvent,
+  type DragEvent,
+  type MouseEvent,
+  useRef,
+  useState
+} from 'react';
 
 import CancelIcon from '@mui/icons-material/Cancel';
 import CloudUploadIcon from '@mui/icons-material/CloudUpload';
 import UploadIcon from '@mui/icons-material/Upload';
-import { Box, Button } from '@mui/material';
+import { Box, Button, Typography, styled } from '@mui/material';
 
 import { useI18nContext } from 'i18n/i18n-react';
 
-import './dragNdrop.css';
+const DocumentUploader = styled(Box)<{ active?: boolean }>(({ theme, active }) => ({
+  border: `2px dashed ${active ? '#6dc24b' : '#4282fe'}`,
+  backgroundColor: '#2e3339',
+  padding: theme.spacing(1.25),
+  display: 'flex',
+  flexDirection: 'column',
+  alignItems: 'center',
+  justifyContent: 'center',
+  position: 'relative',
+  borderRadius: theme.spacing(1),
+  cursor: 'pointer',
+  minHeight: '120px',
+  transition: 'border-color 0.2s ease-in-out'
+}));
 
-const DragNdrop = ({ text, onFileSelected }) => {
+const UploadInfo = styled(Box)({
+  display: 'flex',
+  alignItems: 'center'
+});
+
+const FileInfo = styled(Box)({
+  display: 'flex',
+  flexDirection: 'column',
+  width: '100%',
+  justifyContent: 'space-between',
+  alignItems: 'center'
+});
+
+const FileName = styled(Typography)(({ theme }) => ({
+  fontSize: '14px',
+  color: '#6dc24b',
+  margin: theme.spacing(1, 0)
+}));
+
+interface DragNdropProps {
+  text: string;
+  onFileSelected: (file: File) => void;
+}
+
+const DragNdrop = ({ text, onFileSelected }: DragNdropProps) => {
   const [file, setFile] = useState<File>();
   const [dragged, setDragged] = useState(false);
   const inputRef = useRef<HTMLInputElement | null>(null);
@@ -28,14 +71,17 @@ const DragNdrop = ({ text, onFileSelected }) => {
   };
 
   const handleFileChange = (e: ChangeEvent<HTMLInputElement>) => {
-    if (!e.target.files) {
+    if (!e.target.files || e.target.files.length === 0) {
       return;
     }
-    checkFileExtension(e.target.files[0]);
+    const selectedFile = e.target.files[0];
+    if (selectedFile) {
+      checkFileExtension(selectedFile);
+    }
     e.target.value = ''; // this is to allow the same file to be selected again
   };
 
-  const handleDrop = (event) => {
+  const handleDrop = (event: DragEvent<HTMLDivElement>) => {
     event.preventDefault();
     const droppedFiles = event.dataTransfer.files;
     if (droppedFiles.length > 0) {
@@ -43,38 +89,40 @@ const DragNdrop = ({ text, onFileSelected }) => {
     }
   };
 
-  const handleRemoveFile = (event) => {
+  const handleRemoveFile = (event: MouseEvent<HTMLButtonElement>) => {
     event.stopPropagation();
     setFile(undefined);
     setDragged(false);
   };
 
-  const handleUploadClick = (event) => {
+  const handleUploadClick = (event: MouseEvent<HTMLButtonElement>) => {
     event.stopPropagation();
-    onFileSelected(file);
+    if (file) {
+      onFileSelected(file);
+    }
   };
 
   const handleBrowseClick = () => {
     inputRef.current?.click();
   };
 
-  const handleDragOver = (event) => {
+  const handleDragOver = (event: DragEvent<HTMLDivElement>) => {
     event.preventDefault(); // prevent file from being opened
     setDragged(true);
   };
 
   return (
-    <div
-      className={`document-uploader ${file || dragged ? 'active' : ''}`}
+    <DocumentUploader
+      active={!!(file || dragged)}
       onDrop={handleDrop}
       onDragOver={handleDragOver}
       onDragLeave={() => setDragged(false)}
       onClick={handleBrowseClick}
     >
-      <div className="upload-info">
+      <UploadInfo>
         <CloudUploadIcon sx={{ marginRight: 4 }} color="primary" fontSize="large" />
-        <p>{text}</p>
-      </div>
+        <Typography>{text}</Typography>
+      </UploadInfo>
 
       <input
         type="file"
@@ -88,9 +136,9 @@ const DragNdrop = ({ text, onFileSelected }) => {
 
       {file && (
         <>
-          <div className="file-info">
-            <p>{file.name}</p>
-          </div>
+          <FileInfo>
+            <FileName>{file.name}</FileName>
+          </FileInfo>
           <Box>
             <Button
               startIcon={<CancelIcon />}
@@ -112,7 +160,7 @@ const DragNdrop = ({ text, onFileSelected }) => {
           </Box>
         </>
       )}
-    </div>
+    </DocumentUploader>
   );
 };
 
diff --git a/interface/src/components/upload/dragNdrop.css b/interface/src/components/upload/dragNdrop.css
deleted file mode 100644
index f239b9831..000000000
--- a/interface/src/components/upload/dragNdrop.css
+++ /dev/null
@@ -1,33 +0,0 @@
-.document-uploader {
-  border: 2px dashed #4282fe;
-  background-color: #2e3339;
-  padding: 10px;
-  display: flex;
-  flex-direction: column;
-  align-items: center;
-  justify-content: center;
-  position: relative;
-  border-radius: 8px;
-  cursor: pointer;
-
-  &.active {
-    border-color: #6dc24b;
-  }
-
-  .upload-info {
-    display: flex;
-    align-items: center;
-  }
-
-  .file-info {
-    display: flex;
-    flex-direction: column;
-    width: 100%;
-    justify-content: space-between;
-    align-items: center;
-    p {
-      font-size: 14px;
-      color: #6dc24b;
-    }
-  }
-}