*{box-sizing:border-box}body{margin:0;font-family:Roboto,Helvetica,Arial,sans-serif}.app-container{display:flex;flex-direction:column;min-height:100vh}.app-content{display:flex;flex:1}.main-content{flex:1;padding:24px}.loading-container{display:flex;align-items:center;justify-content:center;height:100vh}