.container{max-width:640px;margin:40px auto;font-family:system-ui,Arial}label{display:block;margin-top:10px}input,select{width:100%;padding:10px;margin-top:6px;border:1px solid #ccc;border-radius:6px}button{margin-top:14px;padding:10px 16px;border:0;border-radius:8px;background:#111;color:#fff}.alert{background:#ffecec;padding:10px;border-radius:6px;margin:10px 0}.ok{background:#eaffea;padding:10px;border-radius:6px;margin:10px 0}