:root{--primary-color: #3f51b5;--accent-color: #ff4081;--warn-color: #f44336}html,body{margin:0;font-family:Roboto,Helvetica Neue,sans-serif}.container{min-height:100vh;background-color:#f5f5f5}.spacer{flex:1 1 auto}.loading{display:flex;justify-content:center;align-items:center;min-height:200px}.error{color:var(--warn-color);text-align:center;padding:20px}