@import url("https://fonts.googleapis.com/css?family=Source+Sans+Pro");
:root,
body {
    color: #fff;
    height: 100%;
    overflow: hidden;
    background: #333641;
}

body {
    display: -webkit-box;
    display: flex;
    -webkit-box-align: center;
    align-items: center;
    -webkit-box-pack: center;
    justify-content: center;
}

div {
    background: 50% 100%/50% 50% no-repeat radial-gradient(ellipse at bottom, #fff, transparent, transparent);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    font-size: 7vw;
    font-family: "Source Sans Pro", sans-serif;
    -webkit-animation:  glow 5000ms ease-in infinite 2000ms;
    animation:  glow 5000ms ease-in infinite 2000ms;
}
@-webkit-keyframes glow {
    50% {
        text-shadow: 0 0 8px #fff;
    }
}
@keyframes glow {
    50% {
        text-shadow: 0 0 8px #fff;
    }
}