body{font-family:Arial;background:#f4f6f9;margin:0} .container{max-width:900px;margin:40px auto;background:#fff;padding:20px;border-radius:8px;box-shadow:0 2px 8px rgba(0,0,0,.15)}table{width:100%;border-collapse:collapse}th,td{padding:10px;border:1px solid #ddd}input,button{padding:10px;margin:6px;width:100%}.btn,button{background:#0b6efd;color:#fff;text-decoration:none;border:none;border-radius:4px;padding:8px 12px;cursor:pointer}