body,html{margin:0;padding:0;height:100%;font-family:"system-ui",sans-serif;background-color:#fff;overflow-x:hidden}.mobile-body{display:flex;flex-direction:column;height:100%;max-width:480px;margin:0 auto;background-color:#f8f8f8}.main-content{flex:1 1;overflow-y:auto;padding:16px;box-sizing:border-box}@media (min-width:768px){.mobile-body{border:1px solid #ddd;border-radius:8px;box-shadow:0 0 10px rgba(0,0,0,.05)}}