body{padding:0;margin:0}
main{min-height:100vh;display:-webkit-box;display:-ms-flexbox;display:flex;-webkit-box-align:center;-ms-flex-align:center;align-items:center;-webkit-box-pack:center;-ms-flex-pack:center;justify-content:center;background:#4f4c4c}
main .logo{max-width:300px;-webkit-animation:pulse 10s infinite;animation:pulse 10s infinite}
@media (max-width:400px){main .logo{max-width:240px;margin-top:-25px}
}
@-webkit-keyframes pulse{0%,100%{-webkit-transform:scale(.95);transform:scale(.95);opacity:.85}
50%{-webkit-transform:scale(1);transform:scale(1);opacity:1}
}
@keyframes pulse{0%,100%{-webkit-transform:scale(.95);transform:scale(.95);opacity:.85}
50%{-webkit-transform:scale(1);transform:scale(1);opacity:1}
}