body{color:#333;background:#333 no-repeat;background-position:center center;background-size:cover;transition:background-color .5s}*{font-family:Roboto,Helvetica,Arial,sans-serif}h1{font-weight:900;margin-bottom:2rem}.matrioska{max-width:16em;margin:4em auto;padding:2em 4em 4em 4em;background:#fff;opacity:.9;box-shadow:0 6px 10px 0 rgba(0,0,0,.14),0 1px 18px 0 rgba(0,0,0,.12),0 3px 5px -1px rgba(0,0,0,.2)}@media screen and (max-width: 320px){.matrioska{padding:2em .5em}}my-app{display:block;min-height:16rem}.signature{margin-top:2rem;font-size:70%}.signature a{text-decoration:none}