body{margin:0}#app{font-family:Avenir,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-align:center;color:#2c3e50}nav{padding:30px}nav a{font-weight:700;color:#2c3e50}nav a.router-link-exact-active{color:#42b983}button{height:150px;width:320px;font-size:3em}.flash{position:fixed;width:100%;height:100%;inset:0;pointer-events:none}.flash{-webkit-animation:flashy .5s infinite;animation:flashy .5s infinite}@-webkit-keyframes flashy{0%{background-color:transparent}to{background-color:red}}@keyframes flashy{0%{background-color:transparent}to{background-color:red}}