body{font-family:Arial,sans-serif;background:#f5f5f5;margin:0}.container{max-width:760px;margin:0 auto;padding:16px}.card{background:#fff;border-radius:12px;padding:16px;margin-bottom:12px}button{padding:10px 14px;border:none;border-radius:8px;background:#3a77ff;color:#fff;cursor:pointer}a{color:#3a77ff}.locked{opacity:.6}