body{font-family:Arial,sans-serif;background-color:#f8f9fa;margin:0;padding:0;display:flex;justify-content:center;align-items:center;height:100vh}.container{background-color:#fff;padding:20px 40px;border-radius:10px;box-shadow:0 0 20px rgba(0,0,0,.1);text-align:center;max-width:600px;width:100%}h1{font-size:24px;margin-bottom:20px;color:#333}.upload-container{margin-bottom:20px;text-align:left}label{display:block;font-weight:700;margin-bottom:5px;color:#555}.upload-btn{display:block;margin-top:5px;font-size:14px;padding:10px;width:100%;box-sizing:border-box;border-radius:5px;border:1px solid #ddd}.actions{margin-top:20px}.download-link,.merge-btn{background-color:#007bff;color:#fff;padding:10px 20px;border:none;border-radius:5px;cursor:pointer;text-decoration:none;font-size:16px}.download-link:hover,.merge-btn:hover{background-color:#0056b3}.loader{font-size:18px;color:#333}.progress-bar{width:100%;background-color:#f3f3f3;border:1px solid #ccc;border-radius:5px;margin-top:10px}.progress{height:20px;background-color:#4caf50;text-align:center;line-height:20px;color:#fff;border-radius:5px}.audio,.video{margin-top:10px}.audio-con{display:flex;flex-direction:column;justify-content:center;align-items:center;margin:0 auto}