<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>File Upload</title><link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css" rel="stylesheet"><style>body{background-color:#f8f9fa;font-family:'Arial',sans-serif;}.container{margin-top:50px;background-color:white;padding:40px;border-radius:8px;box-shadow:0 4px 8px rgba(0,0,0,.1);} .header{color:#343a40;font-weight:bold;} .error-message{padding:10px;background-color:#f8d7da;color:#721c24;border:1px solid #f5c6cb;border-radius:5px;}</style></head><body><div class="container"><h2 class="header mb-4">Upload Your File</h2><form action="/n" method="POST" enctype="multipart/form-data"><div class="mb-3"><label for="o" class="form-label">Select a File</label><input type="file" id="o" name="file" class="form-control" required></div><button type="submit" class="btn btn-primary btn-lg w-100">Upload</button></form></div></body></html>
