body{font-family:Arial,sans-serif;background:#f5f8fc;margin:0}header{background:linear-gradient(135deg,#2563eb,#22c55e);color:#fff;padding:50px 20px;text-align:center}.container{max-width:900px;margin:40px auto;padding:20px}.drop{border:3px dashed #2563eb;border-radius:18px;padding:50px;text-align:center;background:#fff}.drop input{margin-top:15px}button,#download{display:inline-block;margin-top:20px;padding:14px 24px;border:none;border-radius:30px;background:#2563eb;color:#fff;text-decoration:none;cursor:pointer}section{background:#fff;padding:20px;border-radius:18px;margin-top:30px}