@import url(https://fonts.googleapis.com/css?family=Roboto:400,700&display=swap);*{font-family:Roboto,sans-serif}#app{margin:0 auto;margin-top:.5rem;max-width:800px;height:98vh;padding-left:1rem;padding-right:1rem}nav{margin-bottom:1rem;display:flex;justify-content:center;gap:1rem}#app h2{text-align:center}nav a{text-decoration:none;padding:.5rem;color:#000;border:1px solid gray;border-radius:.25rem;background-color:#fff}nav a:focus,nav a:hover{background-color:#d3d3d3}nav a.active{font-weight:700;background-color:#a9a9a9}