html,body{height:100%}body{margin:0;font-family:Roboto,Helvetica Neue,sans-serif}@keyframes glowing{0%{background-color:#00f;box-shadow:0 0 3px #00f}50%{background-color:#000;box-shadow:0 0 10px #000}to{background-color:#00f;box-shadow:0 0 3px #00f}}.buttonAni{color:#fff;animation:glowing 1.3s infinite}