body{margin:0;font-family:Arial,sans-serif;background-color:#f9f9f9}header{background:#282c34;padding:1rem;color:#fff;text-align:center}.navbar{display:flex;gap:1rem;background:#444;padding:.5rem}.navbar a{color:#fff;text-decoration:none}.navbar a:hover{text-decoration:underline}.page{padding:2rem}html,body,#root{height:100%;margin:0}.app-container{display:flex;flex-direction:column;min-height:100%}.content{flex:1;padding:2rem}.footer{background:#eee;padding:1rem;text-align:center;margin-top:auto}