.glow {
    -webkit-animation: glow-text 1.5s ease-in-out infinite alternate;
    -moz-animation: glow-text 1.5s ease-in-out infinite alternate;
    animation: glow-text 1.5s ease-in-out infinite alternate;
}

.glow-box {
    -webkit-animation: glow-box 1.5s ease-in-out infinite alternate;
    -moz-animation: glow-box 1.5s ease-in-out infinite alternate;
    animation: glow-box 1.5s ease-in-out infinite alternate;
}

.glow-blue {
    -webkit-animation: glow-blue 1.5s ease-in-out infinite alternate;
    -moz-animation: glow-blue 1.5s ease-in-out infinite alternate;
    animation: glow-blue 1.5s ease-in-out infinite alternate;
}


@keyframes glow-text {
  from {
    text-shadow: 
        0 0 0px #fff, 
        0 0 2px #fff, 
        0 0 5px #333333, 
        0 0 7px #1f1f1f, 
        0 0 13px #161616, 
        0 0 25px #131313, 
        0 0 25px #000000;
  }
  to {
    text-shadow: 
        0 0 0px #fff, 
        0 0 2px #dddddd, 
        0 0 5px #c0c0c0, 
        0 0 7px #a7a7a7, 
        0 0 13px #7a7a7a, 
        0 0 25px #5c5c5c, 
        0 0 25px #474747;
  }
}

@keyframes glow-blue {
  from {
    text-shadow: 
        0 0 0px #00eeff, 
        0 0 2px #00bfc5, 
        0 0 5px #009ca1, 
        0 0 7px #006172, 
        0 0 13px #004147, 
        0 0 25px #001c41, 
        0 0 25px #000c1d;
  }
  to {
    text-shadow: 
        0 0 0px #00ccff, 
        0 0 2px #009fc7, 
        0 0 5px #01949e, 
        0 0 7px #009191, 
        0 0 13px #006e81, 
        0 0 25px #015f6b, 
        0 0 25px #004a61;
  }
}

@keyframes glow-box {
  from {
    box-shadow: 
        0 0 0px #ff0000, 
        0 0 2px #cc0000, 
        0 0 5px #9b0000, 
        0 0 7px #5a0000, 
        0 0 13px #3f0000, 
        0 0 25px #1f0000, 
        0 0 50px #160000;
  }
  to {
    box-shadow: 
        0 0 0px #ff0000, 
        0 0 2px #c50000, 
        0 0 5px #b10000, 
        0 0 7px #810000, 
        0 0 13px #580000, 
        0 0 25px #550000, 
        0 0 50px #350000;
  }
}