body{font-family:Arial,sans-serif;margin:20px 0 0}.logo{position:absolute;width:50px;left:10px}#upload-container{display:flex;align-items:center;justify-content:center}#file-input{display:none}#file-label{padding:10px 15px;background-color:#fff;color:#000;border:1px solid #000;border-radius:5px;cursor:pointer;font-size:14px}#selected-file{margin-left:10px;font-weight:700;font-size:18px}#error-message{color:red;margin-top:10px}